chore(abacus-react): release v2.8.3 [skip ci]

## [2.8.3](https://github.com/antialias/soroban-abacus-flashcards/compare/abacus-react-v2.8.2...abacus-react-v2.8.3) (2025-11-05)

### Bug Fixes

* **tutorial:** correct column validation for bead highlights ([9ba1824](9ba1824226))
* **tutorial:** fix overlay rendering, arrow indicators, and bead visibility ([a804316](a80431608d))
* **web,docker:** add --format flag for Typst and upgrade to v0.13.0 ([19b9d7a](19b9d7a74f))
* **web:** move tsx to production dependencies for calendar generation ([ffae9c1](ffae9c1bdb))

Dockerfile

@@ -85,7 +85,7 @@ RUN ARCH=$(uname -m) && \
     else \
         echo "Unsupported architecture: $ARCH" && exit 1; \
     fi && \
-    TYPST_VERSION="v0.11.1" && \
+    TYPST_VERSION="v0.13.0" && \
     wget -q "https://github.com/typst/typst/releases/download/${TYPST_VERSION}/typst-${TYPST_ARCH}.tar.xz" && \
     tar -xf "typst-${TYPST_ARCH}.tar.xz" && \
     mv "typst-${TYPST_ARCH}/typst" /usr/local/bin/typst && \
@@ -156,6 +156,9 @@ COPY --from=builder --chown=nextjs:nodejs /app/packages/core ./packages/core
 # Copy templates package (needed for Typst templates)
 COPY --from=builder --chown=nextjs:nodejs /app/packages/templates ./packages/templates
 
+# Copy abacus-react package (needed for calendar generation scripts)
+COPY --from=builder --chown=nextjs:nodejs /app/packages/abacus-react ./packages/abacus-react
+
 # Install Python dependencies for flashcard generation
 RUN pip3 install --no-cache-dir --break-system-packages -r packages/core/requirements.txt
 

apps/web/.claude/CLAUDE.md

@@ -1,5 +1,75 @@
 # Claude Code Instructions for apps/web
 
+## CRITICAL: Production Dependencies
+
+**NEVER add TypeScript execution tools to production dependencies.**
+
+### Forbidden Production Dependencies
+
+The following packages must ONLY be in `devDependencies`, NEVER in `dependencies`:
+
+- ❌ `tsx` - TypeScript execution (only for scripts during development)
+- ❌ `ts-node` - TypeScript execution
+- ❌ Any TypeScript compiler/executor that runs .ts/.tsx files at runtime
+
+### Why This Matters
+
+1. **Docker Image Size**: These tools add 50-100MB+ to production images
+2. **Security**: Running TypeScript at runtime is a security risk
+3. **Performance**: Production should run compiled JavaScript, not interpret TypeScript
+4. **Architecture**: If you need TypeScript at runtime, the code is in the wrong place
+
+### What To Do Instead
+
+**❌ WRONG - Adding tsx to dependencies to run .ts/.tsx at runtime:**
+```json
+{
+  "dependencies": {
+    "tsx": "^4.20.5"  // NEVER DO THIS
+  }
+}
+```
+
+**✅ CORRECT - Move code to proper location:**
+
+1. **For Next.js API routes**: Move files to `src/` so Next.js bundles them during build
+   - Example: `scripts/generateCalendar.tsx` → `src/utils/calendar/generateCalendar.tsx`
+   - Next.js will compile and bundle these during `npm run build`
+
+2. **For standalone scripts**: Keep in `scripts/` and use `tsx` from devDependencies
+   - Only run during development/build, never at runtime
+   - Scripts can use `tsx` because it's available during build
+
+3. **For server-side TypeScript**: Compile to JavaScript during build
+   - Use `tsc` to compile `src/` to `dist/`
+   - Production runs the compiled JavaScript from `dist/`
+
+### Historical Context
+
+**We've made this mistake TWICE:**
+
+1. **First time (commit ffae9c1b)**: Added tsx to dependencies for calendar generation scripts
+   - **Fix**: Moved scripts to `src/utils/calendar/` so Next.js bundles them
+
+2. **Second time (would have happened again)**: Almost added tsx again for same reason
+   - **Learning**: If you're tempted to add tsx to dependencies, the architecture is wrong
+
+### Red Flags
+
+If you find yourself thinking:
+- "I need to add tsx to dependencies to run this .ts file in production"
+- "This script needs TypeScript at runtime"
+- "Production can't import this .tsx file"
+
+**STOP.** The code is in the wrong place. Move it to `src/` for bundling.
+
+### Enforcement
+
+Before modifying `package.json` dependencies:
+1. Check if any TypeScript execution tools are being added
+2. Ask yourself: "Could this code be in `src/` instead?"
+3. If unsure, ask the user before proceeding
+
 ## MANDATORY: Quality Checks for ALL Work
 
 **BEFORE declaring ANY work complete, fixed, or working**, you MUST run and pass these checks:

apps/web/README.md

@@ -0,0 +1 @@
+# Test deployment - Mon Nov  3 16:31:57 CST 2025

apps/web/package.json

@@ -4,7 +4,7 @@
   "private": true,
   "scripts": {
     "dev": "tsc -p tsconfig.server.json && tsc-alias -p tsconfig.server.json && concurrently \"node server.js\" \"npx @pandacss/dev --watch\"",
-    "build": "node scripts/generate-build-info.js && tsc -p tsconfig.server.json && tsc-alias -p tsconfig.server.json && next build",
+    "build": "node scripts/generate-build-info.js && npx @pandacss/dev && tsc -p tsconfig.server.json && tsc-alias -p tsconfig.server.json && next build",
     "start": "NODE_ENV=production node server.js",
     "lint": "npx @biomejs/biome lint . && npx eslint .",
     "lint:fix": "npx @biomejs/biome lint . --write && npx eslint . --fix",

apps/web/scripts/generateCalendarAbacus.tsx

@@ -1,35 +0,0 @@
-#!/usr/bin/env tsx
-
-/**
- * Generate a simple abacus SVG (no customization for now - just get it working)
- * Usage: npx tsx scripts/generateCalendarAbacus.tsx <value> <columns>
- * Example: npx tsx scripts/generateCalendarAbacus.tsx 15 2
- *
- * Pattern copied directly from working generateDayIcon.tsx
- */
-
-import React from 'react'
-import { renderToStaticMarkup } from 'react-dom/server'
-import { AbacusReact } from '@soroban/abacus-react'
-
-const value = parseInt(process.argv[2], 10)
-const columns = parseInt(process.argv[3], 10)
-
-if (isNaN(value) || isNaN(columns)) {
-  console.error('Usage: npx tsx scripts/generateCalendarAbacus.tsx <value> <columns>')
-  process.exit(1)
-}
-
-// Use exact same pattern as generateDayIcon - inline customStyles
-const abacusMarkup = renderToStaticMarkup(
-  <AbacusReact
-    value={value}
-    columns={columns}
-    scaleFactor={1}
-    animated={false}
-    interactive={false}
-    showNumbers={false}
-  />
-)
-
-process.stdout.write(abacusMarkup)

apps/web/src/app/api/create/calendar/generate/route.ts

@@ -1,10 +1,12 @@
 import { type NextRequest, NextResponse } from 'next/server'
-import { writeFileSync, readFileSync, mkdirSync, rmSync } from 'fs'
+import { writeFileSync, mkdirSync, rmSync } from 'fs'
 import { tmpdir } from 'os'
 import { join } from 'path'
 import { execSync } from 'child_process'
 import { generateMonthlyTypst, generateDailyTypst, getDaysInMonth } from '../utils/typstGenerator'
 import type { AbacusConfig } from '@soroban/abacus-react'
+import { generateCalendarComposite } from '@/utils/calendar/generateCalendarComposite'
+import { generateAbacusElement } from '@/utils/calendar/generateCalendarAbacus'
 
 interface CalendarRequest {
   month: number
@@ -18,6 +20,9 @@ export async function POST(request: NextRequest) {
   let tempDir: string | null = null
 
   try {
+    // Dynamic import to avoid Next.js bundler issues with react-dom/server
+    const { renderToStaticMarkup } = await import('react-dom/server')
+
     const body: CalendarRequest = await request.json()
     const { month, year, format, paperSize, abacusConfig } = body
 
@@ -26,58 +31,67 @@ export async function POST(request: NextRequest) {
       return NextResponse.json({ error: 'Invalid month or year' }, { status: 400 })
     }
 
-    // Create temp directory
+    // Create temp directory for SVG files
     tempDir = join(tmpdir(), `calendar-${Date.now()}-${Math.random()}`)
     mkdirSync(tempDir, { recursive: true })
 
-    // Generate SVGs using script (avoids Next.js react-dom/server restriction)
+    // Generate and write SVG files
     const daysInMonth = getDaysInMonth(year, month)
-    const maxDay = format === 'daily' ? daysInMonth : 31 // For monthly, pre-generate all
-    const scriptPath = join(process.cwd(), 'scripts', 'generateCalendarAbacus.tsx')
+    let typstContent: string
 
-    // Generate day SVGs (1 to maxDay)
-    for (let day = 1; day <= maxDay; day++) {
-      const svg = execSync(`npx tsx "${scriptPath}" ${day} 2`, {
-        encoding: 'utf-8',
-        cwd: process.cwd(),
+    if (format === 'monthly') {
+      // Generate single composite SVG for monthly calendar
+      const calendarSvg = generateCalendarComposite({
+        month,
+        year,
+        renderToString: renderToStaticMarkup
+      })
+      if (!calendarSvg || calendarSvg.trim().length === 0) {
+        throw new Error('Generated empty composite calendar SVG')
+      }
+      writeFileSync(join(tempDir, 'calendar.svg'), calendarSvg)
+
+      // Generate Typst document
+      typstContent = generateMonthlyTypst({
+        month,
+        year,
+        paperSize,
+        daysInMonth,
+      })
+    } else {
+      // Daily format: generate individual SVGs for each day
+      for (let day = 1; day <= daysInMonth; day++) {
+        const svg = renderToStaticMarkup(generateAbacusElement(day, 2))
+        if (!svg || svg.trim().length === 0) {
+          throw new Error(`Generated empty SVG for day ${day}`)
+        }
+        writeFileSync(join(tempDir, `day-${day}.svg`), svg)
+      }
+
+      // Generate year SVG
+      const yearColumns = Math.max(1, Math.ceil(Math.log10(year + 1)))
+      const yearSvg = renderToStaticMarkup(generateAbacusElement(year, yearColumns))
+      if (!yearSvg || yearSvg.trim().length === 0) {
+        throw new Error(`Generated empty SVG for year ${year}`)
+      }
+      writeFileSync(join(tempDir, 'year.svg'), yearSvg)
+
+      // Generate Typst document
+      typstContent = generateDailyTypst({
+        month,
+        year,
+        paperSize,
+        daysInMonth,
       })
-      writeFileSync(join(tempDir, `day-${day}.svg`), svg)
     }
 
-    // Generate year SVG
-    const yearColumns = Math.max(1, Math.ceil(Math.log10(year + 1)))
-    const yearSvg = execSync(`npx tsx "${scriptPath}" ${year} ${yearColumns}`, {
-      encoding: 'utf-8',
-      cwd: process.cwd(),
-    })
-    writeFileSync(join(tempDir, 'year.svg'), yearSvg)
-
-    // Generate Typst document
-    const typstContent =
-      format === 'monthly'
-        ? generateMonthlyTypst({
-            month,
-            year,
-            paperSize,
-            tempDir,
-            daysInMonth,
-          })
-        : generateDailyTypst({
-            month,
-            year,
-            paperSize,
-            tempDir,
-            daysInMonth,
-          })
-
-    const typstPath = join(tempDir, 'calendar.typ')
-    writeFileSync(typstPath, typstContent)
-
-    // Compile with Typst
-    const pdfPath = join(tempDir, 'calendar.pdf')
+    // Compile with Typst: stdin for .typ content, stdout for PDF output
+    let pdfBuffer: Buffer
     try {
-      execSync(`typst compile "${typstPath}" "${pdfPath}"`, {
-        stdio: 'pipe',
+      pdfBuffer = execSync('typst compile --format pdf - -', {
+        input: typstContent,
+        cwd: tempDir, // Run in temp dir so relative paths work
+        maxBuffer: 50 * 1024 * 1024, // 50MB limit for large calendars
       })
     } catch (error) {
       console.error('Typst compilation error:', error)
@@ -87,18 +101,14 @@ export async function POST(request: NextRequest) {
       )
     }
 
-    // Read and return PDF
-    const pdfBuffer = readFileSync(pdfPath)
-
     // Clean up temp directory
     rmSync(tempDir, { recursive: true, force: true })
     tempDir = null
 
-    return new NextResponse(pdfBuffer, {
-      headers: {
-        'Content-Type': 'application/pdf',
-        'Content-Disposition': `attachment; filename="calendar-${year}-${String(month).padStart(2, '0')}.pdf"`,
-      },
+    // Return JSON with PDF
+    return NextResponse.json({
+      pdf: pdfBuffer.toString('base64'),
+      filename: `calendar-${year}-${String(month).padStart(2, '0')}.pdf`,
     })
   } catch (error) {
     console.error('Error generating calendar:', error)
@@ -112,6 +122,17 @@ export async function POST(request: NextRequest) {
       }
     }
 
-    return NextResponse.json({ error: 'Failed to generate calendar' }, { status: 500 })
+    // Surface the actual error for debugging
+    const errorMessage = error instanceof Error ? error.message : String(error)
+    const errorStack = error instanceof Error ? error.stack : undefined
+
+    return NextResponse.json(
+      {
+        error: 'Failed to generate calendar',
+        message: errorMessage,
+        ...(process.env.NODE_ENV === 'development' && { stack: errorStack })
+      },
+      { status: 500 }
+    )
   }
 }

apps/web/src/app/api/create/calendar/preview/route.ts

@@ -0,0 +1,97 @@
+import { type NextRequest, NextResponse } from 'next/server'
+import { writeFileSync, mkdirSync, rmSync } from 'fs'
+import { tmpdir } from 'os'
+import { join } from 'path'
+import { execSync } from 'child_process'
+import { generateMonthlyTypst, getDaysInMonth } from '../utils/typstGenerator'
+import { generateCalendarComposite } from '@/utils/calendar/generateCalendarComposite'
+
+interface PreviewRequest {
+  month: number
+  year: number
+  format: 'monthly' | 'daily'
+}
+
+export const dynamic = 'force-dynamic'
+
+export async function POST(request: NextRequest) {
+  let tempDir: string | null = null
+
+  try {
+    const body: PreviewRequest = await request.json()
+    const { month, year, format } = body
+
+    // Validate inputs
+    if (!month || month < 1 || month > 12 || !year || year < 1 || year > 9999) {
+      return NextResponse.json({ error: 'Invalid month or year' }, { status: 400 })
+    }
+
+    // Only generate preview for monthly format
+    if (format !== 'monthly') {
+      return NextResponse.json({ svg: null })
+    }
+
+    // Dynamic import to avoid Next.js bundler issues
+    const { renderToStaticMarkup } = await import('react-dom/server')
+
+    // Create temp directory for SVG file
+    tempDir = join(tmpdir(), `calendar-preview-${Date.now()}-${Math.random()}`)
+    mkdirSync(tempDir, { recursive: true })
+
+    // Generate and write composite SVG
+    const calendarSvg = generateCalendarComposite({
+      month,
+      year,
+      renderToString: renderToStaticMarkup
+    })
+    writeFileSync(join(tempDir, 'calendar.svg'), calendarSvg)
+
+    // Generate Typst document content
+    const daysInMonth = getDaysInMonth(year, month)
+    const typstContent = generateMonthlyTypst({
+      month,
+      year,
+      paperSize: 'us-letter',
+      daysInMonth,
+    })
+
+    // Compile with Typst: stdin for .typ content, stdout for SVG output
+    let svg: string
+    try {
+      svg = execSync('typst compile --format svg - -', {
+        input: typstContent,
+        encoding: 'utf8',
+        cwd: tempDir, // Run in temp dir so relative paths work
+      })
+    } catch (error) {
+      console.error('Typst compilation error:', error)
+      return NextResponse.json(
+        { error: 'Failed to compile preview. Is Typst installed?' },
+        { status: 500 }
+      )
+    }
+
+    // Clean up temp directory
+    rmSync(tempDir, { recursive: true, force: true })
+    tempDir = null
+
+    return NextResponse.json({ svg })
+  } catch (error) {
+    console.error('Error generating preview:', error)
+
+    // Clean up temp directory if it exists
+    if (tempDir) {
+      try {
+        rmSync(tempDir, { recursive: true, force: true })
+      } catch (cleanupError) {
+        console.error('Failed to clean up temp directory:', cleanupError)
+      }
+    }
+
+    const errorMessage = error instanceof Error ? error.message : String(error)
+    return NextResponse.json(
+      { error: 'Failed to generate preview', message: errorMessage },
+      { status: 500 }
+    )
+  }
+}

apps/web/src/app/api/create/calendar/utils/typstGenerator.ts

@@ -1,8 +1,14 @@
-interface TypstConfig {
+interface TypstMonthlyConfig {
+  month: number
+  year: number
+  paperSize: 'us-letter' | 'a4' | 'a3' | 'tabloid'
+  daysInMonth: number
+}
+
+interface TypstDailyConfig {
   month: number
   year: number
   paperSize: 'us-letter' | 'a4' | 'a3' | 'tabloid'
-  tempDir: string
   daysInMonth: number
 }
 
@@ -44,73 +50,38 @@ interface PaperConfig {
 
 function getPaperConfig(size: string): PaperConfig {
   const configs: Record<PaperSize, PaperConfig> = {
-    'us-letter': { typstName: 'us-letter', marginX: '0.75in', marginY: '1in' },
-    a4: { typstName: 'a4', marginX: '2cm', marginY: '2.5cm' },
-    a3: { typstName: 'a3', marginX: '2cm', marginY: '2.5cm' },
-    tabloid: { typstName: 'us-tabloid', marginX: '1in', marginY: '1in' },
+    // Tight margins to maximize space for calendar grid
+    'us-letter': { typstName: 'us-letter', marginX: '0.5in', marginY: '0.5in' },
+    // A4 is slightly taller/narrower than US Letter - adjust margins proportionally
+    a4: { typstName: 'a4', marginX: '1.3cm', marginY: '1.3cm' },
+    // A3 is 2x area of A4 - can use same margins but will scale content larger
+    a3: { typstName: 'a3', marginX: '1.5cm', marginY: '1.5cm' },
+    // Tabloid (11" × 17") is larger - can use more margin
+    tabloid: { typstName: 'us-tabloid', marginX: '0.75in', marginY: '0.75in' },
   }
   return configs[size as PaperSize] || configs['us-letter']
 }
 
-export function generateMonthlyTypst(config: TypstConfig): string {
-  const { month, year, paperSize, tempDir, daysInMonth } = config
+export function generateMonthlyTypst(config: TypstMonthlyConfig): string {
+  const { paperSize } = config
   const paperConfig = getPaperConfig(paperSize)
-  const firstDayOfWeek = getFirstDayOfWeek(year, month)
-  const monthName = MONTH_NAMES[month - 1]
-
-  // Generate calendar cells with proper empty cells before the first day
-  let cells = ''
-
-  // Empty cells before first day
-  for (let i = 0; i < firstDayOfWeek; i++) {
-    cells += '  [],\n'
-  }
-
-  // Day cells
-  for (let day = 1; day <= daysInMonth; day++) {
-    cells += `  [#image("${tempDir}/day-${day}.svg", width: 90%)],\n`
-  }
 
+  // Single-page design: use one composite SVG that scales to fit
+  // This prevents overflow - Typst will scale the image to fit available space
   return `#set page(
   paper: "${paperConfig.typstName}",
   margin: (x: ${paperConfig.marginX}, y: ${paperConfig.marginY}),
 )
 
-#set text(font: "Arial", size: 12pt)
-
-// Title
-#align(center)[
-  #text(size: 24pt, weight: "bold")[${monthName} ${year}]
-
-  #v(0.5em)
-
-  // Year as abacus
-  #image("${tempDir}/year.svg", width: 35%)
+// Composite calendar SVG - scales to fit page (prevents multi-page overflow)
+#align(center + horizon)[
+  #image("calendar.svg", width: 100%, fit: "contain")
 ]
-
-#v(1.5em)
-
-// Calendar grid
-#grid(
-  columns: (1fr, 1fr, 1fr, 1fr, 1fr, 1fr, 1fr),
-  gutter: 4pt,
-
-  // Weekday headers
-  [#align(center)[*Sun*]],
-  [#align(center)[*Mon*]],
-  [#align(center)[*Tue*]],
-  [#align(center)[*Wed*]],
-  [#align(center)[*Thu*]],
-  [#align(center)[*Fri*]],
-  [#align(center)[*Sat*]],
-
-  // Calendar days
-${cells})
 `
 }
 
-export function generateDailyTypst(config: TypstConfig): string {
-  const { month, year, paperSize, tempDir, daysInMonth } = config
+export function generateDailyTypst(config: TypstDailyConfig): string {
+  const { month, year, paperSize, daysInMonth } = config
   const paperConfig = getPaperConfig(paperSize)
   const monthName = MONTH_NAMES[month - 1]
 
@@ -127,14 +98,14 @@ export function generateDailyTypst(config: TypstConfig): string {
   // Header: Year
   #align(center)[
     #v(1em)
-    #image("${tempDir}/year.svg", width: 30%)
+    #image("year.svg", width: 30%)
   ]
 
   #v(2em)
 
   // Main: Day number as large abacus
   #align(center + horizon)[
-    #image("${tempDir}/day-${day}.svg", width: 50%)
+    #image("day-${day}.svg", width: 50%)
   ]
 
   #v(2em)

apps/web/src/app/arcade/complement-race/components/AbacusTarget.tsx

@@ -23,13 +23,11 @@ export function AbacusTarget({ number }: AbacusTargetProps) {
       <AbacusReact
         value={number}
         columns={1}
+        compact={true}
         interactive={false}
         showNumbers={false}
         hideInactiveBeads={true}
         scaleFactor={0.72}
-        customStyles={{
-          columnPosts: { opacity: 0 },
-        }}
       />
     </div>
   )

apps/web/src/app/arcade/page.tsx

@@ -22,6 +22,8 @@ import { getAllGames, getGame, hasGame } from '@/lib/arcade/game-registry'
  *
  * Note: ModerationNotifications is handled by PageWithNav inside each game component,
  * so we don't need to render it here.
+ *
+ * Test: Verifying compose-updater automatic deployment cycle
  */
 export default function RoomPage() {
   const router = useRouter()

apps/web/src/app/arcade/rithmomachia/page.tsx

@@ -2,6 +2,9 @@
 
 import { rithmomachiaGame } from '@/arcade-games/rithmomachia'
 
+// Force dynamic rendering to avoid build-time initialization errors
+export const dynamic = 'force-dynamic'
+
 const { Provider, GameComponent } = rithmomachiaGame
 
 export default function RithmomachiaPage() {

apps/web/src/app/create/calendar/components/CalendarConfigPanel.tsx

@@ -2,7 +2,7 @@
 
 import { css } from '../../../../../styled-system/css'
 import { AbacusReact, useAbacusConfig } from '@soroban/abacus-react'
-import Link from 'next/link'
+import { AbacusDisplayDropdown } from '@/components/AbacusDisplayDropdown'
 
 interface CalendarConfigPanelProps {
   month: number
@@ -243,7 +243,7 @@ export function CalendarConfigPanel({
         </select>
       </fieldset>
 
-      {/* Abacus Styling Info */}
+      {/* Abacus Styling */}
       <div
         data-section="styling-info"
         className={css({
@@ -259,7 +259,7 @@ export function CalendarConfigPanel({
             color: 'gray.300',
           })}
         >
-          Using your saved abacus style:
+          Calendar abacus style preview:
         </p>
         <div
           className={css({
@@ -273,22 +273,17 @@ export function CalendarConfigPanel({
             columns={2}
             customStyles={abacusConfig.customStyles}
             scaleFactor={0.5}
+            showNumbers={false}
           />
         </div>
-        <Link
-          href="/create"
-          data-action="edit-style"
+        <div
           className={css({
-            display: 'block',
-            textAlign: 'center',
-            fontSize: '0.875rem',
-            color: 'yellow.400',
-            textDecoration: 'underline',
-            _hover: { color: 'yellow.300' },
+            display: 'flex',
+            justifyContent: 'center',
           })}
         >
-          Edit your abacus style →
-        </Link>
+          <AbacusDisplayDropdown />
+        </div>
       </div>
 
       {/* Generate Button */}

apps/web/src/app/create/calendar/components/CalendarPreview.tsx

@@ -1,45 +1,43 @@
 'use client'
 
+import { useQuery } from '@tanstack/react-query'
 import { css } from '../../../../../styled-system/css'
-import { AbacusReact, useAbacusConfig } from '@soroban/abacus-react'
 
 interface CalendarPreviewProps {
   month: number
   year: number
   format: 'monthly' | 'daily'
+  previewSvg: string | null
 }
 
-const MONTHS = [
-  'January',
-  'February',
-  'March',
-  'April',
-  'May',
-  'June',
-  'July',
-  'August',
-  'September',
-  'October',
-  'November',
-  'December',
-]
+async function fetchTypstPreview(month: number, year: number, format: string): Promise<string | null> {
+  const response = await fetch('/api/create/calendar/preview', {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ month, year, format }),
+  })
 
-const WEEKDAYS = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat']
+  if (!response.ok) {
+    throw new Error('Failed to fetch preview')
+  }
 
-function getDaysInMonth(year: number, month: number): number {
-  return new Date(year, month, 0).getDate()
+  const data = await response.json()
+  return data.svg
 }
 
-function getFirstDayOfWeek(year: number, month: number): number {
-  return new Date(year, month - 1, 1).getDay()
-}
+export function CalendarPreview({ month, year, format, previewSvg }: CalendarPreviewProps) {
+  // Use React Query to fetch Typst-generated preview (client-side only)
+  const { data: typstPreviewSvg, isLoading } = useQuery({
+    queryKey: ['calendar-typst-preview', month, year, format],
+    queryFn: () => fetchTypstPreview(month, year, format),
+    enabled: typeof window !== 'undefined' && format === 'monthly', // Only run on client and for monthly format
+  })
 
-export function CalendarPreview({ month, year, format }: CalendarPreviewProps) {
-  const abacusConfig = useAbacusConfig()
-  const daysInMonth = getDaysInMonth(year, month)
-  const firstDayOfWeek = getFirstDayOfWeek(year, month)
+  // Use generated PDF SVG if available, otherwise use Typst live preview
+  const displaySvg = previewSvg || typstPreviewSvg
 
-  if (format === 'daily') {
+  // Show loading state while fetching preview
+  if (isLoading || (!displaySvg && format === 'monthly')) {
     return (
       <div
         data-component="calendar-preview"
@@ -57,108 +55,42 @@ export function CalendarPreview({ month, year, format }: CalendarPreviewProps) {
         <p
           className={css({
             fontSize: '1.25rem',
-            color: 'gray.300',
-            marginBottom: '1.5rem',
-            textAlign: 'center',
-          })}
-        >
-          Daily format preview
-        </p>
-        <div
-          className={css({
-            bg: 'white',
-            padding: '3rem 2rem',
-            borderRadius: '8px',
-            boxShadow: '0 4px 6px rgba(0, 0, 0, 0.1)',
-            maxWidth: '400px',
-            width: '100%',
-          })}
-        >
-          {/* Year at top */}
-          <div
-            className={css({
-              display: 'flex',
-              justifyContent: 'center',
-              marginBottom: '2rem',
-            })}
-          >
-            <AbacusReact
-              value={year}
-              columns={4}
-              customStyles={abacusConfig.customStyles}
-              scaleFactor={0.4}
-            />
-          </div>
-
-          {/* Large day number */}
-          <div
-            className={css({
-              display: 'flex',
-              justifyContent: 'center',
-              marginBottom: '2rem',
-            })}
-          >
-            <AbacusReact
-              value={1}
-              columns={2}
-              customStyles={abacusConfig.customStyles}
-              scaleFactor={0.8}
-            />
-          </div>
-
-          {/* Date text */}
-          <div
-            className={css({
-              textAlign: 'center',
-              color: 'gray.800',
-            })}
-          >
-            <div
-              className={css({
-                fontSize: '1.25rem',
-                fontWeight: '600',
-                marginBottom: '0.25rem',
-              })}
-            >
-              {new Date(year, month - 1, 1).toLocaleDateString('en-US', {
-                weekday: 'long',
-              })}
-            </div>
-            <div
-              className={css({
-                fontSize: '1rem',
-                color: 'gray.600',
-              })}
-            >
-              {MONTHS[month - 1]} 1, {year}
-            </div>
-          </div>
-        </div>
-        <p
-          className={css({
-            fontSize: '0.875rem',
             color: 'gray.400',
-            marginTop: '1rem',
             textAlign: 'center',
           })}
         >
-          Example of first day (1 page per day for all {daysInMonth} days)
+          Loading preview...
         </p>
       </div>
     )
   }
 
-  // Monthly format
-  const calendarDays: (number | null)[] = []
-
-  // Add empty cells for days before the first day of month
-  for (let i = 0; i < firstDayOfWeek; i++) {
-    calendarDays.push(null)
-  }
-
-  // Add actual days
-  for (let day = 1; day <= daysInMonth; day++) {
-    calendarDays.push(day)
+  if (!displaySvg) {
+    return (
+      <div
+        data-component="calendar-preview"
+        className={css({
+          bg: 'gray.800',
+          borderRadius: '12px',
+          padding: '2rem',
+          display: 'flex',
+          flexDirection: 'column',
+          alignItems: 'center',
+          justifyContent: 'center',
+          minHeight: '600px',
+        })}
+      >
+        <p
+          className={css({
+            fontSize: '1.25rem',
+            color: 'gray.400',
+            textAlign: 'center',
+          })}
+        >
+          {format === 'daily' ? 'Daily format - preview after generation' : 'No preview available'}
+        </p>
+      </div>
+    )
   }
 
   return (
@@ -168,99 +100,32 @@ export function CalendarPreview({ month, year, format }: CalendarPreviewProps) {
         bg: 'gray.800',
         borderRadius: '12px',
         padding: '2rem',
+        display: 'flex',
+        flexDirection: 'column',
+        alignItems: 'center',
       })}
     >
-      <div
-        className={css({
-          textAlign: 'center',
-          marginBottom: '2rem',
-        })}
-      >
-        <h2
-          className={css({
-            fontSize: '2rem',
-            fontWeight: 'bold',
-            marginBottom: '1rem',
-            color: 'yellow.400',
-          })}
-        >
-          {MONTHS[month - 1]} {year}
-        </h2>
-        <div
-          className={css({
-            display: 'flex',
-            justifyContent: 'center',
-          })}
-        >
-          <AbacusReact
-            value={year}
-            columns={4}
-            customStyles={abacusConfig.customStyles}
-            scaleFactor={0.6}
-          />
-        </div>
-      </div>
-
-      {/* Calendar Grid */}
-      <div
-        className={css({
-          display: 'grid',
-          gridTemplateColumns: 'repeat(7, 1fr)',
-          gap: '0.5rem',
-        })}
-      >
-        {/* Weekday headers */}
-        {WEEKDAYS.map((day) => (
-          <div
-            key={day}
-            className={css({
-              textAlign: 'center',
-              fontWeight: '600',
-              padding: '0.5rem',
-              color: 'yellow.400',
-              fontSize: '0.875rem',
-            })}
-          >
-            {day}
-          </div>
-        ))}
-
-        {/* Calendar days */}
-        {calendarDays.map((day, index) => (
-          <div
-            key={index}
-            className={css({
-              aspectRatio: '1',
-              display: 'flex',
-              alignItems: 'center',
-              justifyContent: 'center',
-              bg: day ? 'gray.700' : 'transparent',
-              borderRadius: '6px',
-              padding: '0.25rem',
-            })}
-          >
-            {day && (
-              <AbacusReact
-                value={day}
-                columns={2}
-                customStyles={abacusConfig.customStyles}
-                scaleFactor={0.35}
-              />
-            )}
-          </div>
-        ))}
-      </div>
-
       <p
         className={css({
-          fontSize: '0.875rem',
-          color: 'gray.400',
-          marginTop: '1.5rem',
+          fontSize: '1.125rem',
+          color: 'yellow.400',
+          marginBottom: '1rem',
           textAlign: 'center',
+          fontWeight: 'bold',
         })}
       >
-        Preview of monthly calendar layout (actual PDF will be optimized for printing)
+        {previewSvg ? 'Generated PDF' : 'Live Preview'}
       </p>
+      <div
+        className={css({
+          bg: 'white',
+          borderRadius: '8px',
+          padding: '1rem',
+          maxWidth: '100%',
+          overflow: 'auto',
+        })}
+        dangerouslySetInnerHTML={{ __html: displaySvg }}
+      />
     </div>
   )
 }

apps/web/src/app/create/calendar/page.tsx

@@ -15,6 +15,7 @@ export default function CalendarCreatorPage() {
   const [format, setFormat] = useState<'monthly' | 'daily'>('monthly')
   const [paperSize, setPaperSize] = useState<'us-letter' | 'a4' | 'a3' | 'tabloid'>('us-letter')
   const [isGenerating, setIsGenerating] = useState(false)
+  const [previewSvg, setPreviewSvg] = useState<string | null>(null)
 
   const handleGenerate = async () => {
     setIsGenerating(true)
@@ -34,21 +35,26 @@ export default function CalendarCreatorPage() {
       })
 
       if (!response.ok) {
-        throw new Error('Failed to generate calendar')
+        const errorData = await response.json().catch(() => ({}))
+        throw new Error(errorData.message || 'Failed to generate calendar')
       }
 
-      const blob = await response.blob()
+      const data = await response.json()
+
+      // Convert base64 PDF to blob and trigger download
+      const pdfBytes = Uint8Array.from(atob(data.pdf), c => c.charCodeAt(0))
+      const blob = new Blob([pdfBytes], { type: 'application/pdf' })
       const url = window.URL.createObjectURL(blob)
       const a = document.createElement('a')
       a.href = url
-      a.download = `calendar-${year}-${String(month).padStart(2, '0')}.pdf`
+      a.download = data.filename
       document.body.appendChild(a)
       a.click()
       window.URL.revokeObjectURL(url)
       document.body.removeChild(a)
     } catch (error) {
       console.error('Error generating calendar:', error)
-      alert('Failed to generate calendar. Please try again.')
+      alert(`Failed to generate calendar: ${error instanceof Error ? error.message : 'Unknown error'}`)
     } finally {
       setIsGenerating(false)
     }
@@ -122,7 +128,7 @@ export default function CalendarCreatorPage() {
             />
 
             {/* Preview */}
-            <CalendarPreview month={month} year={year} format={format} />
+            <CalendarPreview month={month} year={year} format={format} previewSvg={previewSvg} />
           </div>
         </div>
       </div>

apps/web/src/app/test-static-abacus/page.tsx

@@ -0,0 +1,66 @@
+/**
+ * Test page for AbacusStatic - Server Component
+ * This demonstrates that AbacusStatic works without "use client"
+ *
+ * Note: Uses /static import path to avoid client-side code
+ */
+
+import { AbacusStatic } from '@soroban/abacus-react/static'
+
+export default function TestStaticAbacusPage() {
+  const numbers = [1, 2, 3, 4, 5, 10, 25, 50, 100, 123, 456, 789]
+
+  return (
+    <div style={{ padding: '40px', maxWidth: '1200px', margin: '0 auto' }}>
+      <h1 style={{ marginBottom: '10px' }}>AbacusStatic Test (Server Component)</h1>
+      <p style={{ color: '#64748b', marginBottom: '30px' }}>
+        This page is a React Server Component - no &quot;use client&quot; directive!
+        All abacus displays below are rendered on the server with zero client-side JavaScript.
+      </p>
+
+      <div
+        style={{
+          display: 'grid',
+          gridTemplateColumns: 'repeat(auto-fit, minmax(180px, 1fr))',
+          gap: '20px',
+        }}
+      >
+        {numbers.map((num) => (
+          <div
+            key={num}
+            style={{
+              padding: '20px',
+              background: 'white',
+              border: '2px solid #e2e8f0',
+              borderRadius: '12px',
+              display: 'flex',
+              flexDirection: 'column',
+              alignItems: 'center',
+              gap: '10px',
+            }}
+          >
+            <AbacusStatic
+              value={num}
+              columns="auto"
+              hideInactiveBeads
+              compact
+              scaleFactor={0.9}
+            />
+            <span style={{ fontSize: '20px', fontWeight: 'bold', color: '#475569' }}>
+              {num}
+            </span>
+          </div>
+        ))}
+      </div>
+
+      <div style={{ marginTop: '40px', padding: '20px', background: '#f0fdf4', borderRadius: '8px' }}>
+        <h2 style={{ marginTop: 0, color: '#166534' }}>✅ Success!</h2>
+        <p style={{ color: '#15803d' }}>
+          If you can see the abacus displays above, then AbacusStatic is working correctly
+          in React Server Components. Check the page source - you&apos;ll see pure HTML/SVG with
+          no client-side hydration markers!
+        </p>
+      </div>
+    </div>
+  )
+}

apps/web/src/components/HeroAbacus.tsx

@@ -1,7 +1,7 @@
 'use client'
 
 import { useEffect, useRef } from 'react'
-import { AbacusReact, useAbacusConfig } from '@soroban/abacus-react'
+import { AbacusReact, useAbacusConfig, ABACUS_THEMES } from '@soroban/abacus-react'
 import { css } from '../../styled-system/css'
 import { useHomeHero } from '../contexts/HomeHeroContext'
 
@@ -17,19 +17,8 @@ export function HeroAbacus() {
   const appConfig = useAbacusConfig()
   const heroRef = useRef<HTMLDivElement>(null)
 
-  // Styling for structural elements (solid, no translucency)
-  const structuralStyles = {
-    columnPosts: {
-      fill: 'rgb(255, 255, 255)',
-      stroke: 'rgb(200, 200, 200)',
-      strokeWidth: 2,
-    },
-    reckoningBar: {
-      fill: 'rgb(255, 255, 255)',
-      stroke: 'rgb(200, 200, 200)',
-      strokeWidth: 3,
-    },
-  }
+  // Use theme preset from abacus-react instead of manual definition
+  const structuralStyles = ABACUS_THEMES.light
 
   // Detect when hero scrolls out of view
   useEffect(() => {

apps/web/src/components/LevelSliderDisplay.tsx

@@ -3,7 +3,7 @@
 import { useState, useEffect } from 'react'
 import { useSpring, useTransition, animated } from '@react-spring/web'
 import * as Slider from '@radix-ui/react-slider'
-import { AbacusReact, StandaloneBead } from '@soroban/abacus-react'
+import { AbacusReact, StandaloneBead, ABACUS_THEMES } from '@soroban/abacus-react'
 import { css } from '../../styled-system/css'
 import { stack } from '../../styled-system/patterns'
 import { kyuLevelDetails } from '@/data/kyuLevelDetails'
@@ -260,19 +260,8 @@ function parseKyuDetails(rawText: string) {
   return sections
 }
 
-// Dark theme styles matching the homepage
-const darkStyles = {
-  columnPosts: {
-    fill: 'rgba(255, 255, 255, 0.3)',
-    stroke: 'rgba(255, 255, 255, 0.2)',
-    strokeWidth: 2,
-  },
-  reckoningBar: {
-    fill: 'rgba(255, 255, 255, 0.4)',
-    stroke: 'rgba(255, 255, 255, 0.25)',
-    strokeWidth: 3,
-  },
-}
+// Use dark theme preset from abacus-react instead of manual definition
+const darkStyles = ABACUS_THEMES.dark
 
 interface LevelSliderDisplayProps {
   initialIndex?: number

apps/web/src/components/MyAbacus.tsx

@@ -2,7 +2,7 @@
 
 import { useContext, useEffect, useState } from 'react'
 import { usePathname } from 'next/navigation'
-import { AbacusReact, useAbacusConfig } from '@soroban/abacus-react'
+import { AbacusReact, useAbacusConfig, ABACUS_THEMES } from '@soroban/abacus-react'
 import { css } from '../../styled-system/css'
 import { useMyAbacus } from '@/contexts/MyAbacusContext'
 import { HomeHeroContext } from '@/contexts/HomeHeroContext'
@@ -56,33 +56,9 @@ export function MyAbacus() {
     }
   }, [isOpen])
 
-  // Hero mode styles - white structural (from original HeroAbacus)
-  const structuralStyles = {
-    columnPosts: {
-      fill: 'rgb(255, 255, 255)',
-      stroke: 'rgb(200, 200, 200)',
-      strokeWidth: 2,
-    },
-    reckoningBar: {
-      fill: 'rgb(255, 255, 255)',
-      stroke: 'rgb(200, 200, 200)',
-      strokeWidth: 3,
-    },
-  }
-
-  // Trophy abacus styles - golden/premium look
-  const trophyStyles = {
-    columnPosts: {
-      fill: '#fbbf24',
-      stroke: '#f59e0b',
-      strokeWidth: 3,
-    },
-    reckoningBar: {
-      fill: '#fbbf24',
-      stroke: '#f59e0b',
-      strokeWidth: 4,
-    },
-  }
+  // Use theme presets from abacus-react instead of manual definitions
+  const structuralStyles = ABACUS_THEMES.light
+  const trophyStyles = ABACUS_THEMES.trophy
 
   return (
     <>

apps/web/src/components/tutorial/TutorialEditor.tsx

@@ -2,6 +2,7 @@
 
 import { useCallback, useEffect, useMemo, useState } from 'react'
 import Resizable from 'react-resizable-layout'
+import { calculateBeadDiffFromValues } from '@soroban/abacus-react'
 import { css } from '../../../styled-system/css'
 import { hstack, stack, vstack } from '../../../styled-system/patterns'
 import {
@@ -13,7 +14,6 @@ import {
   type TutorialValidation,
 } from '../../types/tutorial'
 import { generateAbacusInstructions } from '../../utils/abacusInstructionGenerator'
-import { calculateBeadDiffFromValues } from '../../utils/beadDiff'
 import { generateSingleProblem } from '../../utils/problemGenerator'
 import {
   createBasicAllowedConfiguration,

apps/web/src/components/tutorial/TutorialPlayer.tsx

@@ -6,6 +6,7 @@ import {
   AbacusReact,
   type StepBeadHighlight,
   useAbacusDisplay,
+  calculateBeadDiffFromValues,
 } from '@soroban/abacus-react'
 import { useTranslations } from 'next-intl'
 import { useCallback, useEffect, useMemo, useRef, useState } from 'react'
@@ -18,7 +19,6 @@ import type {
   TutorialStep,
   UIState,
 } from '../../types/tutorial'
-import { calculateBeadDiffFromValues } from '../../utils/beadDiff'
 import { generateUnifiedInstructionSequence } from '../../utils/unifiedStepGenerator'
 import { CoachBar } from './CoachBar/CoachBar'
 import { DecompositionWithReasons } from './DecompositionWithReasons'
@@ -970,16 +970,11 @@ function TutorialPlayerContent({
 
   // Two-level dynamic column highlights: group terms + individual term
   const dynamicColumnHighlights = useMemo(() => {
-    console.log('🎨 COMPUTING COLUMN HIGHLIGHTS')
-    console.log('  - activeTermIndices:', Array.from(activeTermIndices))
-    console.log('  - activeIndividualTermIndex:', activeIndividualTermIndex)
-
     const highlights: Record<number, any> = {}
 
     // Level 1: Group highlights (blue glow for all terms in activeTermIndices)
     activeTermIndices.forEach((termIndex) => {
       const columnIndex = getColumnFromTermIndex(termIndex, true) // Use group column (rhsPlace)
-      console.log(`  - Group term ${termIndex} maps to column ${columnIndex} (using rhsPlace)`)
       if (columnIndex !== null) {
         highlights[columnIndex] = {
           // Group background glow effect (blue)
@@ -998,16 +993,12 @@ function TutorialPlayerContent({
             borderColor: '#3b82f6',
           },
         }
-        console.log(`  🔵 Added BLUE highlight for column ${columnIndex}`)
       }
     })
 
     // Level 2: Individual term highlight (orange glow, overrides group styling)
     if (activeIndividualTermIndex !== null) {
       const individualColumnIndex = getColumnFromTermIndex(activeIndividualTermIndex, false) // Use individual column (termPlace)
-      console.log(
-        `  - Individual term ${activeIndividualTermIndex} maps to column ${individualColumnIndex} (using termPlace)`
-      )
       if (individualColumnIndex !== null) {
         highlights[individualColumnIndex] = {
           // Individual background glow effect (orange) - overrides group glow
@@ -1026,54 +1017,46 @@ function TutorialPlayerContent({
             borderColor: '#ea580c',
           },
         }
-        console.log(
-          `  🟠 Added ORANGE highlight for column ${individualColumnIndex} (overriding blue)`
-        )
       }
     }
 
-    console.log(
-      '🎨 Final highlights:',
-      Object.keys(highlights).map((col) => `Column ${col}`)
-    )
     return highlights
   }, [activeTermIndices, activeIndividualTermIndex, getColumnFromTermIndex])
 
   // Memoize custom styles calculation to avoid expensive recalculation on every render
   const customStyles = useMemo(() => {
-    // Calculate valid column range based on abacusColumns
-    const minValidColumn = 5 - abacusColumns
-
-    // Start with static highlights from step configuration
-    const staticHighlights: Record<number, any> = {}
+    // Separate bead-level and column-level styles
+    const beadLevelHighlights: Record<number, any> = {}
+    const columnLevelHighlights: Record<number, any> = {}
 
+    // Process static highlights from step configuration (bead-specific)
     if (currentStep.highlightBeads && Array.isArray(currentStep.highlightBeads)) {
       currentStep.highlightBeads.forEach((highlight) => {
         // Convert placeValue to columnIndex for AbacusReact compatibility
         const columnIndex = abacusColumns - 1 - highlight.placeValue
 
-        // Skip highlights for columns that don't exist
-        if (columnIndex < minValidColumn) {
+        // Skip highlights for columns that don't exist in the rendered abacus
+        if (columnIndex < 0 || columnIndex >= abacusColumns) {
           return
         }
 
         // Initialize column if it doesn't exist
-        if (!staticHighlights[columnIndex]) {
-          staticHighlights[columnIndex] = {}
+        if (!beadLevelHighlights[columnIndex]) {
+          beadLevelHighlights[columnIndex] = {}
         }
 
         // Add the bead style to the appropriate type
         if (highlight.beadType === 'earth' && highlight.position !== undefined) {
-          if (!staticHighlights[columnIndex].earth) {
-            staticHighlights[columnIndex].earth = {}
+          if (!beadLevelHighlights[columnIndex].earth) {
+            beadLevelHighlights[columnIndex].earth = {}
           }
-          staticHighlights[columnIndex].earth[highlight.position] = {
+          beadLevelHighlights[columnIndex].earth[highlight.position] = {
             fill: '#fbbf24',
             stroke: '#f59e0b',
             strokeWidth: 3,
           }
         } else {
-          staticHighlights[columnIndex][highlight.beadType] = {
+          beadLevelHighlights[columnIndex][highlight.beadType] = {
             fill: '#fbbf24',
             stroke: '#f59e0b',
             strokeWidth: 3,
@@ -1082,29 +1065,30 @@ function TutorialPlayerContent({
       })
     }
 
-    // Merge static and dynamic highlights (dynamic takes precedence)
-    const mergedHighlights = { ...staticHighlights }
+    // Process dynamic column highlights (column-level: backgroundGlow, numerals)
     Object.keys(dynamicColumnHighlights).forEach((columnIndexStr) => {
       const columnIndex = parseInt(columnIndexStr, 10)
 
-      // Skip highlights for columns that don't exist
-      if (columnIndex < minValidColumn) {
+      // Skip highlights for columns that don't exist in the rendered abacus
+      if (columnIndex < 0 || columnIndex >= abacusColumns) {
         return
       }
 
-      if (!mergedHighlights[columnIndex]) {
-        mergedHighlights[columnIndex] = {}
-      }
-      // Merge dynamic highlights into the column
-      Object.assign(mergedHighlights[columnIndex], dynamicColumnHighlights[columnIndex])
+      // Dynamic highlights are column-level (backgroundGlow, numerals)
+      columnLevelHighlights[columnIndex] = dynamicColumnHighlights[columnIndex]
     })
 
     // Build the custom styles object
     const styles: any = {}
 
-    // Add column highlights if any
-    if (Object.keys(mergedHighlights).length > 0) {
-      styles.columns = mergedHighlights
+    // Add bead-level highlights to styles.beads
+    if (Object.keys(beadLevelHighlights).length > 0) {
+      styles.beads = beadLevelHighlights
+    }
+
+    // Add column-level highlights to styles.columns
+    if (Object.keys(columnLevelHighlights).length > 0) {
+      styles.columns = columnLevelHighlights
     }
 
     // Add frame styling for dark mode
@@ -1123,6 +1107,17 @@ function TutorialPlayerContent({
       }
     }
 
+    // Debug logging for custom styles
+    if (Object.keys(styles).length > 0) {
+      console.log('📋 TUTORIAL CUSTOM STYLES:', JSON.stringify({
+        beadLevelHighlights,
+        columnLevelHighlights,
+        finalStyles: styles,
+        currentStepHighlightBeads: currentStep.highlightBeads,
+        abacusColumns,
+      }, null, 2))
+    }
+
     return Object.keys(styles).length > 0 ? styles : undefined
   }, [currentStep.highlightBeads, dynamicColumnHighlights, abacusColumns, theme])
 
@@ -1608,7 +1603,7 @@ function TutorialPlayerContent({
                   columns={abacusColumns}
                   interactive={true}
                   animated={true}
-                  scaleFactor={2.5}
+                  scaleFactor={1.5}
                   colorScheme={abacusConfig.colorScheme}
                   beadShape={abacusConfig.beadShape}
                   hideInactiveBeads={abacusConfig.hideInactiveBeads}

apps/web/src/utils/abacusInstructionGenerator.ts

@@ -1,29 +1,30 @@
 // Automatic instruction generator for abacus tutorial steps
-import type { ValidPlaceValues } from '@soroban/abacus-react'
+// Re-exports core types and functions from abacus-react
 
-export interface BeadState {
-  heavenActive: boolean
-  earthActive: number // 0-4
-}
+export type { ValidPlaceValues } from '@soroban/abacus-react'
+export {
+  type BeadState,
+  type AbacusState,
+  type PlaceValueBasedBead as BeadHighlight,
+  numberToAbacusState,
+  calculateBeadChanges,
+} from '@soroban/abacus-react'
 
-export interface AbacusState {
-  [placeValue: number]: BeadState
-}
+import type { ValidPlaceValues, PlaceValueBasedBead } from '@soroban/abacus-react'
+import { numberToAbacusState, calculateBeadChanges } from '@soroban/abacus-react'
 
-export interface BeadHighlight {
-  placeValue: ValidPlaceValues
-  beadType: 'heaven' | 'earth'
-  position?: number
-}
+// Type alias for internal use
+type BeadHighlight = PlaceValueBasedBead
 
-export interface StepBeadHighlight extends BeadHighlight {
+// App-specific extension for step-based tutorial highlighting
+export interface StepBeadHighlight extends PlaceValueBasedBead {
   stepIndex: number // Which instruction step this bead belongs to
   direction: 'up' | 'down' | 'activate' | 'deactivate' // Movement direction
   order?: number // Order within the step (for multiple beads per step)
 }
 
 export interface GeneratedInstruction {
-  highlightBeads: BeadHighlight[]
+  highlightBeads: PlaceValueBasedBead[]
   expectedAction: 'add' | 'remove' | 'multi-step'
   actionDescription: string
   multiStepInstructions?: string[]
@@ -40,68 +41,7 @@ export interface GeneratedInstruction {
   }
 }
 
-// Convert a number to abacus state representation
-export function numberToAbacusState(value: number, maxPlaces: number = 5): AbacusState {
-  const state: AbacusState = {}
-
-  for (let place = 0; place < maxPlaces; place++) {
-    const placeValueNum = 10 ** place
-    const digit = Math.floor(value / placeValueNum) % 10
-
-    state[place] = {
-      heavenActive: digit >= 5,
-      earthActive: digit >= 5 ? digit - 5 : digit,
-    }
-  }
-
-  return state
-}
-
-// Calculate the difference between two abacus states
-export function calculateBeadChanges(
-  startState: AbacusState,
-  targetState: AbacusState
-): {
-  additions: BeadHighlight[]
-  removals: BeadHighlight[]
-  placeValue: number
-} {
-  const additions: BeadHighlight[] = []
-  const removals: BeadHighlight[] = []
-  let mainPlaceValue = 0
-
-  for (const placeStr in targetState) {
-    const place = parseInt(placeStr, 10) as ValidPlaceValues
-    const start = startState[place] || { heavenActive: false, earthActive: 0 }
-    const target = targetState[place]
-
-    // Check heaven bead changes
-    if (!start.heavenActive && target.heavenActive) {
-      additions.push({ placeValue: place, beadType: 'heaven' })
-      mainPlaceValue = place
-    } else if (start.heavenActive && !target.heavenActive) {
-      removals.push({ placeValue: place, beadType: 'heaven' })
-      mainPlaceValue = place
-    }
-
-    // Check earth bead changes
-    if (target.earthActive > start.earthActive) {
-      // Adding earth beads
-      for (let pos = start.earthActive; pos < target.earthActive; pos++) {
-        additions.push({ placeValue: place, beadType: 'earth', position: pos })
-        mainPlaceValue = place
-      }
-    } else if (target.earthActive < start.earthActive) {
-      // Removing earth beads
-      for (let pos = start.earthActive - 1; pos >= target.earthActive; pos--) {
-        removals.push({ placeValue: place, beadType: 'earth', position: pos })
-        mainPlaceValue = place
-      }
-    }
-  }
-
-  return { additions, removals, placeValue: mainPlaceValue }
-}
+// Note: numberToAbacusState and calculateBeadChanges are now re-exported from @soroban/abacus-react above
 
 // Generate proper complement breakdown using simple bead movements
 function generateProperComplementDescription(

apps/web/src/utils/beadDiff.ts

@@ -1,107 +1,25 @@
-// Dynamic bead diff algorithm for calculating transitions between abacus states
-// Provides arrows, highlights, and movement directions for tutorial UI
+// Re-export core bead diff functionality from abacus-react
+// App-specific extensions for multi-step tutorials and validation
 
-import type { ValidPlaceValues } from '@soroban/abacus-react'
-import {
+export {
+  type BeadDiffResult,
+  type BeadDiffOutput,
+  calculateBeadDiff,
+  calculateBeadDiffFromValues,
+  areStatesEqual,
   type AbacusState,
-  type BeadHighlight,
-  calculateBeadChanges,
-  numberToAbacusState,
-} from './abacusInstructionGenerator'
+  type BeadState,
+} from '@soroban/abacus-react'
 
-export interface BeadDiffResult {
-  placeValue: ValidPlaceValues
-  beadType: 'heaven' | 'earth'
-  position?: number
-  direction: 'activate' | 'deactivate'
-  order: number // Order of operations for animations
-}
-
-export interface BeadDiffOutput {
-  changes: BeadDiffResult[]
-  highlights: BeadHighlight[]
-  hasChanges: boolean
-  summary: string
-}
-
-/**
- * THE BEAD DIFF ALGORITHM
- *
- * Takes current and desired abacus states and returns exactly which beads
- * need to move with arrows and highlights for the tutorial UI.
- *
- * This is the core "diff" function that keeps tutorial highlights in sync.
- */
-export function calculateBeadDiff(fromState: AbacusState, toState: AbacusState): BeadDiffOutput {
-  const { additions, removals } = calculateBeadChanges(fromState, toState)
-
-  const changes: BeadDiffResult[] = []
-  const highlights: BeadHighlight[] = []
-  let order = 0
-
-  // Process removals first (pedagogical order: clear before adding)
-  removals.forEach((removal) => {
-    changes.push({
-      placeValue: removal.placeValue,
-      beadType: removal.beadType,
-      position: removal.position,
-      direction: 'deactivate',
-      order: order++,
-    })
-
-    highlights.push({
-      placeValue: removal.placeValue,
-      beadType: removal.beadType,
-      position: removal.position,
-    })
-  })
-
-  // Process additions second (pedagogical order: add after clearing)
-  additions.forEach((addition) => {
-    changes.push({
-      placeValue: addition.placeValue,
-      beadType: addition.beadType,
-      position: addition.position,
-      direction: 'activate',
-      order: order++,
-    })
-
-    highlights.push({
-      placeValue: addition.placeValue,
-      beadType: addition.beadType,
-      position: addition.position,
-    })
-  })
-
-  // Generate summary
-  const summary = generateDiffSummary(changes)
-
-  return {
-    changes,
-    highlights,
-    hasChanges: changes.length > 0,
-    summary,
-  }
-}
-
-/**
- * Calculate bead diff from numeric values
- * Convenience function for when you have numbers instead of states
- */
-export function calculateBeadDiffFromValues(
-  fromValue: number,
-  toValue: number,
-  maxPlaces: number = 5
-): BeadDiffOutput {
-  const fromState = numberToAbacusState(fromValue, maxPlaces)
-  const toState = numberToAbacusState(toValue, maxPlaces)
-  return calculateBeadDiff(fromState, toState)
-}
+import type { BeadDiffOutput, BeadDiffResult, AbacusState } from '@soroban/abacus-react'
+import { calculateBeadDiffFromValues } from '@soroban/abacus-react'
 
 /**
  * Calculate step-by-step bead diffs for multi-step operations
  * This is used for tutorial multi-step instructions where we want to show
  * the progression through intermediate states
+ *
+ * APP-SPECIFIC FUNCTION - not in core abacus-react
  */
 export function calculateMultiStepBeadDiffs(
   startValue: number,
@@ -133,126 +51,10 @@ export function calculateMultiStepBeadDiffs(
   return stepDiffs
 }
 
-/**
- * Generate a human-readable summary of what the diff does
- * Respects pedagogical order: removals first, then additions
- */
-function generateDiffSummary(changes: BeadDiffResult[]): string {
-  if (changes.length === 0) {
-    return 'No changes needed'
-  }
-
-  // Sort by order to respect pedagogical sequence
-  const sortedChanges = [...changes].sort((a, b) => a.order - b.order)
-
-  const deactivations = sortedChanges.filter((c) => c.direction === 'deactivate')
-  const activations = sortedChanges.filter((c) => c.direction === 'activate')
-
-  const parts: string[] = []
-
-  // Process deactivations first (pedagogical order)
-  if (deactivations.length > 0) {
-    const deactivationsByPlace = groupByPlace(deactivations)
-    Object.entries(deactivationsByPlace).forEach(([place, beads]) => {
-      const placeName = getPlaceName(parseInt(place, 10))
-      const heavenBeads = beads.filter((b) => b.beadType === 'heaven')
-      const earthBeads = beads.filter((b) => b.beadType === 'earth')
-
-      if (heavenBeads.length > 0) {
-        parts.push(`remove heaven bead in ${placeName}`)
-      }
-      if (earthBeads.length > 0) {
-        const count = earthBeads.length
-        parts.push(`remove ${count} earth bead${count > 1 ? 's' : ''} in ${placeName}`)
-      }
-    })
-  }
-
-  // Process activations second (pedagogical order)
-  if (activations.length > 0) {
-    const activationsByPlace = groupByPlace(activations)
-    Object.entries(activationsByPlace).forEach(([place, beads]) => {
-      const placeName = getPlaceName(parseInt(place, 10))
-      const heavenBeads = beads.filter((b) => b.beadType === 'heaven')
-      const earthBeads = beads.filter((b) => b.beadType === 'earth')
-
-      if (heavenBeads.length > 0) {
-        parts.push(`add heaven bead in ${placeName}`)
-      }
-      if (earthBeads.length > 0) {
-        const count = earthBeads.length
-        parts.push(`add ${count} earth bead${count > 1 ? 's' : ''} in ${placeName}`)
-      }
-    })
-  }
-
-  return parts.join(', then ')
-}
-
-/**
- * Group bead changes by place value
- */
-function groupByPlace(changes: BeadDiffResult[]): {
-  [place: string]: BeadDiffResult[]
-} {
-  return changes.reduce(
-    (groups, change) => {
-      const place = change.placeValue.toString()
-      if (!groups[place]) {
-        groups[place] = []
-      }
-      groups[place].push(change)
-      return groups
-    },
-    {} as { [place: string]: BeadDiffResult[] }
-  )
-}
-
-/**
- * Get human-readable place name
- */
-function getPlaceName(place: number): string {
-  switch (place) {
-    case 0:
-      return 'ones column'
-    case 1:
-      return 'tens column'
-    case 2:
-      return 'hundreds column'
-    case 3:
-      return 'thousands column'
-    default:
-      return `place ${place} column`
-  }
-}
-
-/**
- * Check if two abacus states are equal
- */
-export function areStatesEqual(state1: AbacusState, state2: AbacusState): boolean {
-  const places1 = Object.keys(state1)
-    .map((k) => parseInt(k, 10))
-    .sort()
-  const places2 = Object.keys(state2)
-    .map((k) => parseInt(k, 10))
-    .sort()
-
-  if (places1.length !== places2.length) return false
-
-  for (const place of places1) {
-    const bead1 = state1[place]
-    const bead2 = state2[place]
-
-    if (!bead2) return false
-    if (bead1.heavenActive !== bead2.heavenActive) return false
-    if (bead1.earthActive !== bead2.earthActive) return false
-  }
-
-  return true
-}
-
 /**
  * Validate that a bead diff is feasible (no impossible bead states)
+ *
+ * APP-SPECIFIC FUNCTION - not in core abacus-react
  */
 export function validateBeadDiff(diff: BeadDiffOutput): {
   isValid: boolean
@@ -282,3 +84,20 @@ export function validateBeadDiff(diff: BeadDiffOutput): {
     errors,
   }
 }
+
+// Helper function for validation
+function groupByPlace(changes: BeadDiffResult[]): {
+  [place: string]: BeadDiffResult[]
+} {
+  return changes.reduce(
+    (groups, change) => {
+      const place = change.placeValue.toString()
+      if (!groups[place]) {
+        groups[place] = []
+      }
+      groups[place].push(change)
+      return groups
+    },
+    {} as { [place: string]: BeadDiffResult[] }
+  )
+}

apps/web/src/utils/calendar/generateCalendarAbacus.tsx

@@ -0,0 +1,19 @@
+/**
+ * Generate a simple abacus SVG element
+ * Uses AbacusStatic for server-side rendering (no client hooks)
+ */
+
+import React from 'react'
+import { AbacusStatic } from '@soroban/abacus-react/static'
+
+export function generateAbacusElement(value: number, columns: number) {
+  return (
+    <AbacusStatic
+      value={value}
+      columns={columns}
+      scaleFactor={1}
+      showNumbers={false}
+      frameVisible={true}
+    />
+  )
+}

apps/web/src/utils/calendar/generateCalendarComposite.tsx

@@ -0,0 +1,187 @@
+/**
+ * Generate a complete monthly calendar as a single SVG
+ * This prevents multi-page overflow - one image scales to fit
+ */
+
+import React from 'react'
+import { AbacusStatic, calculateAbacusDimensions } from '@soroban/abacus-react/static'
+
+interface CalendarCompositeOptions {
+  month: number
+  year: number
+  renderToString: (element: React.ReactElement) => string
+}
+
+const MONTH_NAMES = [
+  'January', 'February', 'March', 'April', 'May', 'June',
+  'July', 'August', 'September', 'October', 'November', 'December',
+]
+
+const WEEKDAYS = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat']
+
+function getDaysInMonth(year: number, month: number): number {
+  return new Date(year, month, 0).getDate()
+}
+
+function getFirstDayOfWeek(year: number, month: number): number {
+  return new Date(year, month - 1, 1).getDay()
+}
+
+export function generateCalendarComposite(options: CalendarCompositeOptions): string {
+  const { month, year, renderToString } = options
+  const daysInMonth = getDaysInMonth(year, month)
+  const firstDayOfWeek = getFirstDayOfWeek(year, month)
+  const monthName = MONTH_NAMES[month - 1]
+
+// Layout constants for US Letter aspect ratio (8.5 x 11)
+const WIDTH = 850
+const HEIGHT = 1100
+const MARGIN = 50
+const CONTENT_WIDTH = WIDTH - MARGIN * 2
+const CONTENT_HEIGHT = HEIGHT - MARGIN * 2
+
+// Abacus natural size is 120x230 at scale=1
+const ABACUS_NATURAL_WIDTH = 120
+const ABACUS_NATURAL_HEIGHT = 230
+
+// Calculate how many columns needed for year
+const yearColumns = Math.max(1, Math.ceil(Math.log10(year + 1)))
+
+// Year abacus dimensions (calculate first to determine header height)
+// Use the shared dimension calculator so we stay in sync with AbacusStatic
+const { width: yearAbacusActualWidth, height: yearAbacusActualHeight } = calculateAbacusDimensions({
+  columns: yearColumns,
+  showNumbers: false,
+  columnLabels: [],
+})
+
+const yearAbacusDisplayWidth = WIDTH * 0.15 // Display size on page
+const yearAbacusDisplayHeight = (yearAbacusActualHeight / yearAbacusActualWidth) * yearAbacusDisplayWidth
+
+// Header - sized to fit month name + year abacus
+const MONTH_NAME_HEIGHT = 40
+const HEADER_HEIGHT = MONTH_NAME_HEIGHT + yearAbacusDisplayHeight + 20 // 20px spacing
+const TITLE_Y = MARGIN + 35
+const yearAbacusX = (WIDTH - yearAbacusDisplayWidth) / 2
+const yearAbacusY = TITLE_Y + 10
+
+// Calendar grid
+const GRID_START_Y = MARGIN + HEADER_HEIGHT
+const GRID_HEIGHT = CONTENT_HEIGHT - HEADER_HEIGHT
+const WEEKDAY_ROW_HEIGHT = 25
+const DAY_GRID_HEIGHT = GRID_HEIGHT - WEEKDAY_ROW_HEIGHT
+
+// 7 columns, up to 6 rows (35 cells max = 5 empty + 30 days worst case)
+const CELL_WIDTH = CONTENT_WIDTH / 7
+const DAY_CELL_HEIGHT = DAY_GRID_HEIGHT / 6
+
+// Day abacus sizing - fit in cell with padding
+const CELL_PADDING = 5
+
+// Calculate max scale to fit in cell
+const MAX_SCALE_X = (CELL_WIDTH - CELL_PADDING * 2) / ABACUS_NATURAL_WIDTH
+const MAX_SCALE_Y = (DAY_CELL_HEIGHT - CELL_PADDING * 2) / ABACUS_NATURAL_HEIGHT
+const ABACUS_SCALE = Math.min(MAX_SCALE_X, MAX_SCALE_Y) * 0.9 // 90% to leave breathing room
+
+const SCALED_ABACUS_WIDTH = ABACUS_NATURAL_WIDTH * ABACUS_SCALE
+const SCALED_ABACUS_HEIGHT = ABACUS_NATURAL_HEIGHT * ABACUS_SCALE
+
+// Generate calendar grid
+const calendarCells: (number | null)[] = []
+for (let i = 0; i < firstDayOfWeek; i++) {
+  calendarCells.push(null)
+}
+for (let day = 1; day <= daysInMonth; day++) {
+  calendarCells.push(day)
+}
+
+// Render individual abacus SVGs as complete SVG elements
+function renderAbacusSVG(value: number, columns: number, scale: number): string {
+  return renderToString(
+    <AbacusStatic
+      value={value}
+      columns={columns}
+      scaleFactor={scale}
+      showNumbers={false}
+      frameVisible={true}
+      compact={false}
+    />
+  )
+}
+
+// Main composite SVG
+const compositeSVG = `<svg xmlns="http://www.w3.org/2000/svg" width="${WIDTH}" height="${HEIGHT}" viewBox="0 0 ${WIDTH} ${HEIGHT}">
+  <!-- Background -->
+  <rect width="${WIDTH}" height="${HEIGHT}" fill="white"/>
+
+  <!-- Title: Month Name -->
+  <text x="${WIDTH / 2}" y="${TITLE_Y}" text-anchor="middle" font-family="Arial" font-size="32" font-weight="bold" fill="#1a1a1a">
+    ${monthName}
+  </text>
+
+  <!-- Year Abacus (centered below month name) -->
+  ${(() => {
+    const yearAbacusSVG = renderAbacusSVG(year, yearColumns, 1)
+    const yearAbacusContent = yearAbacusSVG.replace(/<svg[^>]*>/, '').replace(/<\/svg>$/, '')
+    return `<svg x="${yearAbacusX}" y="${yearAbacusY}" width="${yearAbacusDisplayWidth}" height="${yearAbacusDisplayHeight}"
+         viewBox="0 0 ${yearAbacusActualWidth} ${yearAbacusActualHeight}">
+    ${yearAbacusContent}
+  </svg>`
+  })()}
+
+  <!-- Weekday Headers -->
+  ${WEEKDAYS.map((day, i) => `
+  <text x="${MARGIN + i * CELL_WIDTH + CELL_WIDTH / 2}" y="${GRID_START_Y + 18}"
+        text-anchor="middle" font-family="Arial" font-size="14" font-weight="bold" fill="#555">
+    ${day}
+  </text>`).join('')}
+
+  <!-- Separator line under weekdays -->
+  <line x1="${MARGIN}" y1="${GRID_START_Y + WEEKDAY_ROW_HEIGHT}"
+        x2="${WIDTH - MARGIN}" y2="${GRID_START_Y + WEEKDAY_ROW_HEIGHT}"
+        stroke="#333" stroke-width="2"/>
+
+  <!-- Calendar Grid Cells -->
+  ${calendarCells.map((day, index) => {
+    const row = Math.floor(index / 7)
+    const col = index % 7
+    const cellX = MARGIN + col * CELL_WIDTH
+    const cellY = GRID_START_Y + WEEKDAY_ROW_HEIGHT + row * DAY_CELL_HEIGHT
+
+    return `
+  <rect x="${cellX}" y="${cellY}" width="${CELL_WIDTH}" height="${DAY_CELL_HEIGHT}"
+        fill="none" stroke="#333" stroke-width="2"/>`
+  }).join('')}
+
+  <!-- Calendar Day Abaci -->
+  ${calendarCells.map((day, index) => {
+    if (day === null) return ''
+
+    const row = Math.floor(index / 7)
+    const col = index % 7
+    const cellX = MARGIN + col * CELL_WIDTH
+    const cellY = GRID_START_Y + WEEKDAY_ROW_HEIGHT + row * DAY_CELL_HEIGHT
+
+    // Center abacus in cell
+    const abacusCenterX = cellX + CELL_WIDTH / 2
+    const abacusCenterY = cellY + DAY_CELL_HEIGHT / 2
+
+    // Offset to top-left corner of abacus (accounting for scaled size)
+    const abacusX = abacusCenterX - SCALED_ABACUS_WIDTH / 2
+    const abacusY = abacusCenterY - SCALED_ABACUS_HEIGHT / 2
+
+    // Render at scale=1 and let the nested SVG handle scaling via viewBox
+    const abacusSVG = renderAbacusSVG(day, 2, 1)
+    const svgContent = abacusSVG.replace(/<svg[^>]*>/, '').replace(/<\/svg>$/, '')
+
+    return `
+  <!-- Day ${day} (row ${row}, col ${col}) -->
+  <svg x="${abacusX}" y="${abacusY}" width="${SCALED_ABACUS_WIDTH}" height="${SCALED_ABACUS_HEIGHT}"
+       viewBox="0 0 ${ABACUS_NATURAL_WIDTH} ${ABACUS_NATURAL_HEIGHT}">
+    ${svgContent}
+  </svg>`
+  }).join('')}
+</svg>`
+
+  return compositeSVG
+}

packages/abacus-react/.claude/settings.local.json

@@ -11,7 +11,13 @@
       "Bash(git commit:*)",
       "Bash(npm run build:*)",
       "Bash(git reset:*)",
-      "Bash(cat:*)"
+      "Bash(cat:*)",
+      "Bash(pnpm --filter @soroban/abacus-react build:*)",
+      "Bash(git show:*)",
+      "Bash(pnpm build:*)",
+      "Bash(pnpm --filter @soroban/web build:*)",
+      "Bash(pnpm tsc:*)",
+      "Bash(AbacusReact.tsx)"
     ]
   },
   "enableAllProjectMcpServers": true,

packages/abacus-react/CHANGELOG.md

@@ -1,3 +1,96 @@
+## [2.8.3](https://github.com/antialias/soroban-abacus-flashcards/compare/abacus-react-v2.8.2...abacus-react-v2.8.3) (2025-11-05)
+
+
+### Bug Fixes
+
+* **tutorial:** correct column validation for bead highlights ([9ba1824](https://github.com/antialias/soroban-abacus-flashcards/commit/9ba18242262cd63cc6c25361aaec3a4c0f66b161))
+* **tutorial:** fix overlay rendering, arrow indicators, and bead visibility ([a804316](https://github.com/antialias/soroban-abacus-flashcards/commit/a80431608dbc4f54d8e4f1095936b95a258b4a72))
+* **web,docker:** add --format flag for Typst and upgrade to v0.13.0 ([19b9d7a](https://github.com/antialias/soroban-abacus-flashcards/commit/19b9d7a74f549c7e93c9564e4a903e1bcd5a4bbc))
+* **web:** move tsx to production dependencies for calendar generation ([ffae9c1](https://github.com/antialias/soroban-abacus-flashcards/commit/ffae9c1bdbccc5edb2e747a09d1fcad3b29e4eac))
+
+## [2.8.2](https://github.com/antialias/soroban-abacus-flashcards/compare/abacus-react-v2.8.1...abacus-react-v2.8.2) (2025-11-04)
+
+
+### Bug Fixes
+
+* **abacus-react:** add data-testid attributes back to beads for testing ([23ae1b0](https://github.com/antialias/soroban-abacus-flashcards/commit/23ae1b0c6f878daf79a993992d43ad80a89fa790))
+
+## [2.8.1](https://github.com/antialias/soroban-abacus-flashcards/compare/abacus-react-v2.8.0...abacus-react-v2.8.1) (2025-11-04)
+
+
+### Bug Fixes
+
+* **abacus-react:** fix animations by preventing component remounting ([be7d4c4](https://github.com/antialias/soroban-abacus-flashcards/commit/be7d4c471327534a95c4c75372680c629b5f12c2))
+* **abacus-react:** restore original AbacusReact measurements and positioning ([88c0baa](https://github.com/antialias/soroban-abacus-flashcards/commit/88c0baaad9b83b60ab8cdcad92070cc049d61cc7))
+
+# [2.8.0](https://github.com/antialias/soroban-abacus-flashcards/compare/abacus-react-v2.7.1...abacus-react-v2.8.0) (2025-11-04)
+
+
+### Bug Fixes
+
+* **docker:** add scripts, abacus-react, and tsx for production calendar generation ([33eb90e](https://github.com/antialias/soroban-abacus-flashcards/commit/33eb90e316f84650ae619f8c6c02c9e77c663d1b))
+* **web:** generate styled-system artifacts during build ([293390a](https://github.com/antialias/soroban-abacus-flashcards/commit/293390ae350a6c6aa467410f68c735512104d9dd))
+* **web:** move react-dom/server import to API route to satisfy Next.js ([00a8bc3](https://github.com/antialias/soroban-abacus-flashcards/commit/00a8bc3e5e8f044df280c4356d3605a852f82e84))
+* **web:** prevent abacus overlap in composite calendar ([448f93c](https://github.com/antialias/soroban-abacus-flashcards/commit/448f93c1e2a7f86bc48e678d4599ca968c6d81d2)), closes [#f0f0f0](https://github.com/antialias/soroban-abacus-flashcards/issues/f0f0f0)
+* **web:** use dynamic import for react-dom/server in API route ([4f93c7d](https://github.com/antialias/soroban-abacus-flashcards/commit/4f93c7d996732de4bc19e7acf2d4ce803cba88b6))
+* **web:** use nested SVG elements to prevent coordinate space conflicts ([f9cbee8](https://github.com/antialias/soroban-abacus-flashcards/commit/f9cbee8fcdf80641f3b82a65fad6b8a3575525fc))
+
+
+### Features
+
+* **abacus-react:** add shared dimension calculator for consistent sizing ([e5ba772](https://github.com/antialias/soroban-abacus-flashcards/commit/e5ba772fde9839c22daec92007f052ca125c7695))
+* **web:** add Typst-based preview endpoint with React Suspense ([599a758](https://github.com/antialias/soroban-abacus-flashcards/commit/599a758471c43ab0fc87301c5e7eeceed608062e))
+* **web:** add year abacus to calendar header and make grid bolder ([867c7ee](https://github.com/antialias/soroban-abacus-flashcards/commit/867c7ee17251b8df13665bee9c0391961975e681)), closes [#333](https://github.com/antialias/soroban-abacus-flashcards/issues/333)
+* **web:** optimize monthly calendar for single-page layout ([b277a89](https://github.com/antialias/soroban-abacus-flashcards/commit/b277a89415d1823455376c3e0f641b52f3394e7c))
+* **web:** redesign monthly calendar as single composite SVG ([8ce8038](https://github.com/antialias/soroban-abacus-flashcards/commit/8ce8038baeea0b8b0fffe3215746958731bd9d6a))
+
+## [2.7.1](https://github.com/antialias/soroban-abacus-flashcards/compare/abacus-react-v2.7.0...abacus-react-v2.7.1) (2025-11-04)
+
+
+### Bug Fixes
+
+* add xmlns to AbacusStatic for Typst SVG parsing ([98cd019](https://github.com/antialias/soroban-abacus-flashcards/commit/98cd019d4af91d7ca4e7a88f700194273476afb7))
+* **web:** use AbacusStatic for calendar SVG generation ([08c6a41](https://github.com/antialias/soroban-abacus-flashcards/commit/08c6a419e25d220560eba13d6db437145e6e61b8))
+
+# [2.7.0](https://github.com/antialias/soroban-abacus-flashcards/compare/abacus-react-v2.6.0...abacus-react-v2.7.0) (2025-11-04)
+
+
+### Bug Fixes
+
+* **web:** add dynamic export to rithmomachia page ([329e623](https://github.com/antialias/soroban-abacus-flashcards/commit/329e62321245ef62726c986c917f19a909a5b65e))
+* **web:** fix Typst PDF generation path resolution ([7ce1287](https://github.com/antialias/soroban-abacus-flashcards/commit/7ce12875254a31d8acdb35ef5de7d36d215ccd92))
+
+
+### Features
+
+* **abacus-react:** add separate /static export path for React Server Components ([ed69f6b](https://github.com/antialias/soroban-abacus-flashcards/commit/ed69f6b917c543bbcaa4621a0e63745bee70f5bf))
+* **web:** add test page for AbacusStatic RSC compatibility ([903dea2](https://github.com/antialias/soroban-abacus-flashcards/commit/903dea25844f1d2b3730fbcbd8478e7af1887663))
+* **web:** improve calendar abacus preview styling ([8439727](https://github.com/antialias/soroban-abacus-flashcards/commit/8439727b152accf61f0c28158b92788510ca086e))
+
+# [2.6.0](https://github.com/antialias/soroban-abacus-flashcards/compare/abacus-react-v2.5.0...abacus-react-v2.6.0) (2025-11-04)
+
+
+### Bug Fixes
+
+* **abacus-react:** correct column highlighting offset in AbacusStatic ([0641eb7](https://github.com/antialias/soroban-abacus-flashcards/commit/0641eb719ef56c67de965296006df666f83e5b08))
+
+
+### Features
+
+* **abacus-react:** add AbacusStatic for React Server Components ([3b8e864](https://github.com/antialias/soroban-abacus-flashcards/commit/3b8e864cfa3af50b1912ce7ff55003d7f6b9c229))
+* **web:** add test page for AbacusStatic Server Component ([3588d5a](https://github.com/antialias/soroban-abacus-flashcards/commit/3588d5acde25588ce4db3ee32adb04ace0e394d4))
+
+# [2.5.0](https://github.com/antialias/soroban-abacus-flashcards/compare/abacus-react-v2.4.0...abacus-react-v2.5.0) (2025-11-03)
+
+
+### Features
+
+* **abacus-react:** add core utility functions for state management ([e65541c](https://github.com/antialias/soroban-abacus-flashcards/commit/e65541c100e590a51448750c6d5178ed4f3e8eeb))
+* **abacus-react:** add layout and educational props ([35bbcec](https://github.com/antialias/soroban-abacus-flashcards/commit/35bbcecb9e36f1ef5917a5a629f5e78f1f490e9c))
+* **abacus-react:** add pre-defined theme presets ([cf1f950](https://github.com/antialias/soroban-abacus-flashcards/commit/cf1f950c7c5fb9ee1f0de673235d6f037be3b9d6))
+* **abacus-react:** add React hooks for abacus calculations ([de038d2](https://github.com/antialias/soroban-abacus-flashcards/commit/de038d2afc26c36c1490d5ea45dace0ab812c5cc))
+* **abacus-react:** export new utilities, hooks, and themes ([ce4e44d](https://github.com/antialias/soroban-abacus-flashcards/commit/ce4e44d6302746053ad40dc61bab57ef3a0a9f31))
+
 # [2.4.0](https://github.com/antialias/soroban-abacus-flashcards/compare/abacus-react-v2.3.0...abacus-react-v2.4.0) (2025-11-03)
 
 

packages/abacus-react/ENHANCEMENT_PLAN.md

@@ -0,0 +1,402 @@
+# Abacus-React Feature Enhancement Plan
+
+## Executive Summary
+
+The web application has developed numerous custom patterns and workarounds for styling, layout, and interactions with the abacus component. These patterns reveal gaps in the abacus-react API that, if addressed, would significantly improve developer experience and reduce code duplication across the application.
+
+## Priority 1: Critical Features (High Impact, High Frequency)
+
+### 1. **Inline "Mini Abacus" Component**
+**Location**: `apps/web/src/app/arcade/complement-race/components/AbacusTarget.tsx`
+
+**Current Implementation**:
+```tsx
+<AbacusReact
+  value={number}
+  columns={1}
+  interactive={false}
+  showNumbers={false}
+  hideInactiveBeads={true}
+  scaleFactor={0.72}
+  customStyles={{
+    columnPosts: { opacity: 0 },
+  }}
+/>
+```
+
+**Problem**: Creating an inline mini-abacus for displaying single digits requires multiple props and style overrides. This pattern appears throughout game UIs.
+
+**Proposed Solution**: Add a `variant` prop with preset configurations:
+
+```tsx
+// Native API proposal
+<AbacusReact
+  value={7}
+  variant="inline-digit"
+  // Automatically sets: columns=1, hideInactiveBeads, transparent frame, optimal scaleFactor
+/>
+
+// Or more granular:
+<AbacusReact
+  value={7}
+  compact={true}  // Removes frame, optimizes spacing
+  frameVisible={false}  // Hide posts and bar
+/>
+```
+
+**Benefits**:
+- Single prop instead of 5+
+- Consistent inline abacus appearance across the app
+- Better semantic intent
+
+---
+
+### 2. **Theme-Aware Styling Presets**
+**Locations**:
+- `MyAbacus.tsx` (lines 60-85) - structural & trophy styles
+- `HeroAbacus.tsx` (lines 20-32) - structural styles
+- `LevelSliderDisplay.tsx` (lines 263-275) - dark theme styles
+
+**Current Pattern**: Every component defines custom style objects for structural elements:
+
+```tsx
+const structuralStyles = {
+  columnPosts: {
+    fill: 'rgb(255, 255, 255)',
+    stroke: 'rgb(200, 200, 200)',
+    strokeWidth: 2,
+  },
+  reckoningBar: {
+    fill: 'rgb(255, 255, 255)',
+    stroke: 'rgb(200, 200, 200)',
+    strokeWidth: 3,
+  },
+}
+```
+
+**Problem**: Manual style object creation for common themes is repetitive and error-prone.
+
+**Proposed Solution**: Add theme presets to abacus-react:
+
+```tsx
+// Native API proposal
+<AbacusReact
+  value={123}
+  theme="dark"  // or "light", "translucent", "solid", "trophy"
+/>
+
+// Or expose theme constants
+import { ABACUS_THEMES } from '@soroban/abacus-react'
+<AbacusReact customStyles={ABACUS_THEMES.dark} />
+```
+
+**Benefits**:
+- Eliminates ~30 lines of style definitions per component
+- Ensures visual consistency
+- Makes theme switching trivial
+
+---
+
+### 3. **Scaling Containers & Responsive Layouts**
+**Locations**:
+- `HeroAbacus.tsx` (lines 133-138) - manual scale transforms
+- `MyAbacus.tsx` (lines 214-218) - responsive scale values
+- `LevelSliderDisplay.tsx` (lines 370-379) - dynamic scale calculation
+
+**Current Pattern**: Components manually wrap abacus in transform containers:
+
+```tsx
+<div style={{
+  transform: 'scale(3.5)',
+  transformOrigin: 'center center'
+}}>
+  <AbacusReact value={1234} columns={4} />
+</div>
+```
+
+**Problem**: Manual transform handling requires extra DOM nesting, breaks click boundaries, and makes centering complex.
+
+**Proposed Solution**: Enhanced `scaleFactor` with responsive breakpoints:
+
+```tsx
+// Native API proposal
+<AbacusReact
+  value={1234}
+  scaleFactor={{ base: 2.5, md: 3.5, lg: 4.5 }}  // Responsive
+  scaleOrigin="center"  // Handle transform origin
+  scaleContainer={true}  // Apply correct boundaries for interaction
+/>
+```
+
+**Benefits**:
+- Eliminates wrapper divs
+- Proper click/hover boundaries
+- Built-in responsive scaling
+
+---
+
+## Priority 2: Developer Experience Improvements
+
+### 4. **Bead Diff Calculation System**
+**Location**: `apps/web/src/utils/beadDiff.ts` (285 lines) + `abacusInstructionGenerator.ts` (400+ lines)
+
+**Current Implementation**: Complex utilities to calculate which beads need to move between states:
+
+```tsx
+// Current external pattern
+import { calculateBeadDiffFromValues } from '@/utils/beadDiff'
+
+const diff = calculateBeadDiffFromValues(fromValue, toValue)
+const stepBeadHighlights = diff.changes.map(change => ({
+  placeValue: change.placeValue,
+  beadType: change.beadType,
+  direction: change.direction,
+  // ...
+}))
+```
+
+**Problem**: Tutorial/game developers need to calculate bead movements manually. This core logic belongs in abacus-react.
+
+**Proposed Solution**: Add a diff calculation hook:
+
+```tsx
+// Native API proposal
+import { useAbacusDiff } from '@soroban/abacus-react'
+
+function Tutorial() {
+  const diff = useAbacusDiff(startValue, targetValue)
+
+  return (
+    <AbacusReact
+      value={currentValue}
+      stepBeadHighlights={diff.highlights}  // Generated by hook
+      // diff also includes: instructions, order, validation
+    />
+  )
+}
+```
+
+**Benefits**:
+- Centralizes "diff" algorithm
+- Eliminates ~500 lines of application code
+- Better tested and maintained
+
+---
+
+### 5. **Tutorial/Step Context Provider**
+**Location**: `apps/web/src/components/tutorial/TutorialContext.tsx`
+
+**Current Pattern**: Apps need to implement complex state management for multi-step tutorial flows with reducer patterns, event tracking, and error handling.
+
+**Problem**: Tutorial infrastructure is duplicated across components. The logic for tracking progress through abacus instruction steps is tightly coupled to application code.
+
+**Proposed Solution**: Add optional tutorial/stepper context to abacus-react:
+
+```tsx
+// Native API proposal
+import { AbacusReact, AbacusTutorial } from '@soroban/abacus-react'
+
+<AbacusTutorial
+  steps={[
+    { from: 0, to: 5, instruction: "Add 5" },
+    { from: 5, to: 15, instruction: "Add 10" },
+  ]}
+  onStepComplete={(step) => { /* analytics */ }}
+  onComplete={() => { /* celebration */ }}
+>
+  <AbacusReact />
+</AbacusTutorial>
+```
+
+**Benefits**:
+- Reusable tutorial infrastructure
+- Built-in progress tracking and validation
+- Could power educational features across projects
+
+---
+
+## Priority 3: Nice-to-Have Enhancements
+
+### 6. **Animation Speed Configuration**
+**Location**: `LevelSliderDisplay.tsx` (lines 306-345)
+
+**Current Pattern**: Applications control animation speed by rapidly changing the value prop:
+
+```tsx
+const intervalMs = 500 - danProgress * 490  // 500ms down to 10ms
+setInterval(() => {
+  setAnimatedDigits(prev => {
+    // Rapidly change digits to simulate calculation
+  })
+}, intervalMs)
+```
+
+**Problem**: "Rapid calculation" animation requires external interval management.
+
+**Proposed Solution**: Add animation speed prop:
+
+```tsx
+// Native API proposal
+<AbacusReact
+  value={calculatingValue}
+  animationSpeed="fast"  // or "normal", "slow", or ms number
+  autoAnimate={true}  // Animate value prop changes automatically
+/>
+```
+
+**Benefits**:
+- Smoother animations with internal management
+- Consistent timing across the app
+
+---
+
+### 7. **Draggable/Positionable Abacus Cards**
+**Location**: `InteractiveFlashcards.tsx`
+
+**Current Pattern**: Complex drag-and-drop implementation wrapped around each AbacusReact instance with pointer capture, offset tracking, and rotation.
+
+**Problem**: Making abacus instances draggable requires significant boilerplate.
+
+**Proposed Solution**: This is probably too specific to remain external. However, a ref-based API to get bounding boxes would help:
+
+```tsx
+// Possible improvement
+const abacusRef = useAbacusRef()
+
+<AbacusReact ref={abacusRef} />
+
+// abacusRef.current.getBoundingBox() for drag calculations
+```
+
+---
+
+### 8. **Column Highlighting for Multi-Step Problems**
+**Location**: Tutorial system extensively
+
+**Current Pattern**: Manual column highlighting based on place values with custom overlay positioning logic.
+
+**Problem**: Highlighting specific columns (e.g., "the tens column") requires external overlay management.
+
+**Proposed Solution**: Add native column highlighting:
+
+```tsx
+// Native API proposal
+<AbacusReact
+  value={123}
+  highlightColumns={[1]}  // Highlight tens column
+  columnLabels={["ones", "tens", "hundreds"]}  // Optional labels
+/>
+```
+
+---
+
+## Priority 4: Documentation & Exports
+
+### 9. **Utility Functions & Types**
+**Current State**: Apps re-implement utilities for working with abacus states:
+- `numberToAbacusState()` - convert numbers to bead states
+- `calculateBeadChanges()` - diff algorithm
+- `ValidPlaceValues` type - imported but limited
+
+**Proposed Solution**: Export more utilities from abacus-react:
+
+```tsx
+// Expanded exports
+export {
+  // Utilities
+  numberToAbacusState,
+  abacusStateToNumber,
+  calculateBeadDiff,
+  validateAbacusValue,
+
+  // Types
+  AbacusState,
+  BeadState,
+  PlaceValue,
+
+  // Hooks
+  useAbacusDiff,
+  useAbacusValidation,
+  useAbacusState,
+}
+```
+
+---
+
+## Implementation Roadmap
+
+### Phase 1 (Immediate) ✅ COMPLETED
+1. ✅ Add `frameVisible={false}` prop
+2. ✅ Add `compact` prop/variant
+3. ✅ Export theme presets (ABACUS_THEMES constant)
+
+### Phase 2 (Short-term) ✅ COMPLETED
+4. ⏸️ Enhanced `scaleFactor` with responsive object support (DEFERRED - too complex, low priority)
+5. ✅ Export utility functions (numberToAbacusState, calculateBeadDiff, etc.)
+
+### Phase 3 (Medium-term) ✅ COMPLETED
+6. ✅ Add `useAbacusDiff` hook
+7. ✅ Add native column highlighting with `highlightColumns` and `columnLabels` props
+
+### Phase 4 (Long-term - Future)
+8. 📋 Consider tutorial context provider (needs more research)
+9. 📋 Animation speed controls
+
+## Completed Features Summary
+
+### New Props
+- `frameVisible?: boolean` - Show/hide column posts and reckoning bar
+- `compact?: boolean` - Compact layout for inline display (implies frameVisible=false)
+- `highlightColumns?: number[]` - Highlight specific columns by index
+- `columnLabels?: string[]` - Optional labels for columns
+
+### New Exports
+- `ABACUS_THEMES` - Pre-defined theme presets (light, dark, trophy, translucent, solid, traditional)
+- `AbacusThemeName` type - TypeScript type for theme names
+
+### New Utility Functions
+- `numberToAbacusState(value, maxPlaces)` - Convert number to bead positions
+- `abacusStateToNumber(state)` - Convert bead positions to number
+- `calculateBeadChanges(startState, targetState)` - Calculate bead differences
+- `calculateBeadDiff(fromState, toState)` - Full diff with order and directions
+- `calculateBeadDiffFromValues(from, to, maxPlaces)` - Convenience wrapper
+- `validateAbacusValue(value, maxPlaces)` - Validate number ranges
+- `areStatesEqual(state1, state2)` - Compare states
+
+### New Hooks
+- `useAbacusDiff(fromValue, toValue, maxPlaces)` - Calculate bead differences for tutorials
+- `useAbacusState(value, maxPlaces)` - Convert number to abacus state (memoized)
+
+### New Types
+- `BeadState` - Bead state in a single column
+- `AbacusState` - Complete abacus state
+- `BeadDiffResult` - Single bead movement result
+- `BeadDiffOutput` - Complete diff output
+- `PlaceValueBasedBead` - Internal place-value based bead type
+
+---
+
+## Metrics & Impact
+
+**Code Reduction Estimate**:
+- Eliminates ~800-1000 lines of repetitive application code
+- Reduces component complexity by ~40% for tutorial/game components
+
+**Developer Experience**:
+- Faster onboarding for new features using abacus
+- More consistent UX across application
+- Better TypeScript support and autocomplete
+
+**Maintenance**:
+- Centralized logic easier to test and debug
+- Single source of truth for abacus behavior
+- Easier to add new features (e.g., sound effects for different themes)
+
+---
+
+## Questions for Discussion
+
+1. Should we split these into separate packages (e.g., `@soroban/abacus-tutorial`)?
+2. Which theme presets should be included by default?
+3. Should responsive scaling use CSS media queries or JS breakpoints?
+4. How much tutorial logic belongs in the core library vs. app code?

packages/abacus-react/INTEGRATION_SUMMARY.md

@@ -0,0 +1,162 @@
+# Integration Summary
+
+## ✅ Completed: Apps/Web Integration with Abacus-React Enhancements
+
+### Features Implemented & Integrated
+
+#### 1. **Theme Presets (ABACUS_THEMES)**
+**Status:** ✅ Fully integrated
+
+**Files Updated:**
+- `apps/web/src/components/MyAbacus.tsx` - Now uses `ABACUS_THEMES.light` and `ABACUS_THEMES.trophy`
+- `apps/web/src/components/HeroAbacus.tsx` - Now uses `ABACUS_THEMES.light`
+- `apps/web/src/components/LevelSliderDisplay.tsx` - Now uses `ABACUS_THEMES.dark`
+
+**Code Eliminated:** ~60 lines of duplicate theme style definitions
+
+---
+
+#### 2. **Compact Prop**
+**Status:** ✅ Fully integrated
+
+**Files Updated:**
+- `apps/web/src/app/arcade/complement-race/components/AbacusTarget.tsx` - Now uses `compact={true}`
+
+**Before:**
+```tsx
+<AbacusReact
+  value={number}
+  columns={1}
+  interactive={false}
+  showNumbers={false}
+  hideInactiveBeads={true}
+  scaleFactor={0.72}
+  customStyles={{ columnPosts: { opacity: 0 } }}
+/>
+```
+
+**After:**
+```tsx
+<AbacusReact
+  value={number}
+  columns={1}
+  compact={true}
+  interactive={false}
+  showNumbers={false}
+  hideInactiveBeads={true}
+  scaleFactor={0.72}
+/>
+```
+
+---
+
+#### 3. **Utility Functions**
+**Status:** ✅ Fully integrated
+
+**Files Updated:**
+- `apps/web/src/utils/beadDiff.ts` - Now re-exports from abacus-react
+- `apps/web/src/utils/abacusInstructionGenerator.ts` - Now re-exports from abacus-react
+- `apps/web/src/components/tutorial/TutorialPlayer.tsx` - Imports `calculateBeadDiffFromValues` from abacus-react
+- `apps/web/src/components/tutorial/TutorialEditor.tsx` - Imports `calculateBeadDiffFromValues` from abacus-react
+
+**Exports from abacus-react:**
+- `numberToAbacusState()`
+- `abacusStateToNumber()`
+- `calculateBeadChanges()`
+- `calculateBeadDiff()`
+- `calculateBeadDiffFromValues()`
+- `validateAbacusValue()`
+- `areStatesEqual()`
+
+**Code Eliminated:** ~200+ lines of duplicate utility implementations
+
+---
+
+#### 4. **React Hooks**
+**Status:** ✅ Exported and ready to use
+
+**Available Hooks:**
+- `useAbacusDiff(fromValue, toValue, maxPlaces)` - Memoized bead diff calculation
+- `useAbacusState(value, maxPlaces)` - Memoized state conversion
+
+**Not yet used in app** (available for future tutorials)
+
+---
+
+#### 5. **Column Highlighting**
+**Status:** ✅ Implemented, not yet used
+
+**New Props:**
+- `highlightColumns?: number[]` - Highlight specific columns
+- `columnLabels?: string[]` - Add educational labels above columns
+
+**Usage Example:**
+```tsx
+<AbacusReact
+  value={123}
+  highlightColumns={[1]}
+  columnLabels={['ones', 'tens', 'hundreds']}
+/>
+```
+
+---
+
+### Code Deduplication Summary
+
+**Total Lines Eliminated:** ~260-300 lines
+
+**Breakdown:**
+- Theme style definitions: ~60 lines
+- Utility function implementations: ~200 lines
+- Custom styles for inline abacus: ~5-10 lines per usage
+
+---
+
+### Remaining Work (Optional Future Enhancements)
+
+1. Use `highlightColumns` and `columnLabels` in tutorial components
+2. Replace manual bead diff calculations with `useAbacusDiff` hook in interactive tutorials
+3. Use `useAbacusState` for state inspection in debugging/development tools
+4. Consider implementing `frameVisible` toggles in settings pages
+
+---
+
+### Files Modified
+
+**packages/abacus-react:**
+- `src/AbacusReact.tsx` - Added new props (frameVisible, compact, highlightColumns, columnLabels)
+- `src/AbacusThemes.ts` - **NEW FILE** - 6 theme presets
+- `src/AbacusUtils.ts` - **NEW FILE** - Core utility functions
+- `src/AbacusHooks.ts` - **NEW FILE** - React hooks
+- `src/index.ts` - Updated exports
+- `src/AbacusReact.themes-and-utilities.stories.tsx` - **NEW FILE** - Storybook demos
+- `README.md` - Updated with new features documentation
+- `ENHANCEMENT_PLAN.md` - Updated with completion status
+
+**apps/web:**
+- `src/components/MyAbacus.tsx` - Using ABACUS_THEMES
+- `src/components/HeroAbacus.tsx` - Using ABACUS_THEMES
+- `src/components/LevelSliderDisplay.tsx` - Using ABACUS_THEMES
+- `src/app/arcade/complement-race/components/AbacusTarget.tsx` - Using compact prop
+- `src/components/tutorial/TutorialPlayer.tsx` - Importing from abacus-react
+- `src/components/tutorial/TutorialEditor.tsx` - Importing from abacus-react
+- `src/utils/beadDiff.ts` - Re-exports from abacus-react
+- `src/utils/abacusInstructionGenerator.ts` - Re-exports from abacus-react
+
+---
+
+### Testing
+
+✅ Build successful for packages/abacus-react
+✅ TypeScript compilation passes for integrated files
+✅ Runtime tests confirm functions work correctly
+✅ Storybook stories demonstrate all new features
+
+---
+
+### Next Steps
+
+1. Monitor app for any runtime issues with the new integrations
+2. Consider using hooks in future tutorial implementations
+3. Explore using column highlighting in educational content
+4. Document best practices for theme usage in the app

packages/abacus-react/README.md

@@ -14,6 +14,7 @@ A comprehensive React component for rendering interactive Soroban (Japanese abac
 - 🎓 **Tutorial system** - Built-in overlay and guidance capabilities
 - 🧩 **Framework-free SVG** - Complete control over rendering
 - ✨ **3D Enhancement** - Three levels of progressive 3D effects for immersive visuals
+- 🚀 **Server Component support** - AbacusStatic works in React Server Components (Next.js App Router)
 
 ## Installation
 
@@ -86,34 +87,213 @@ Personalized colors and highlights
 />
 ```
 
+### Theme Presets
+
+Use pre-defined themes for quick styling:
+
+```tsx
+import { AbacusReact, ABACUS_THEMES } from '@soroban/abacus-react';
+
+// Available themes: 'light', 'dark', 'trophy', 'translucent', 'solid', 'traditional'
+<AbacusReact
+  value={123}
+  columns={3}
+  customStyles={ABACUS_THEMES.dark}
+/>
+
+<AbacusReact
+  value={456}
+  columns={3}
+  customStyles={ABACUS_THEMES.trophy}  // Golden frame for achievements
+/>
+
+<AbacusReact
+  value={789}
+  columns={3}
+  customStyles={ABACUS_THEMES.traditional}  // Brown wooden appearance
+/>
+```
+
+**Available Themes:**
+- `light` - Solid white frame with subtle gray accents (best for light backgrounds)
+- `dark` - Translucent white with subtle glow (best for dark backgrounds)
+- `trophy` - Golden frame with warm tones (best for achievements/rewards)
+- `translucent` - Nearly invisible frame (best for inline/minimal UI)
+- `solid` - Black frame (best for high contrast/educational contexts)
+- `traditional` - Brown wooden appearance (best for traditional soroban aesthetic)
+
+### Static Display (Server Components)
+
+For static, non-interactive displays that work in React Server Components:
+
+```tsx
+// IMPORTANT: Use /static import path for RSC compatibility!
+import { AbacusStatic } from '@soroban/abacus-react/static';
+
+// ✅ Works in React Server Components - no "use client" needed!
+// ✅ No JavaScript sent to client
+// ✅ Perfect for SSG, SSR, and static previews
+
+<AbacusStatic
+  value={123}
+  columns="auto"
+  hideInactiveBeads
+  compact
+/>
+```
+
+**Import paths:**
+- `@soroban/abacus-react` - Full package (client components with hooks/animations)
+- `@soroban/abacus-react/static` - Server-compatible components only (no client code)
+
+**Guaranteed Visual Consistency:**
+
+Both `AbacusStatic` and `AbacusReact` share the same underlying layout engine. **Same props = same exact SVG output.** This ensures:
+- Static previews match interactive versions pixel-perfect
+- Server-rendered abaci look identical to client-rendered ones
+- PDF generation produces accurate representations
+- No visual discrepancies between environments
+
+**Architecture: How We Guarantee Consistency**
+
+The package uses a shared rendering architecture with dependency injection:
+
+```
+┌─────────────────────────────────────────────┐
+│ Shared Utilities (AbacusUtils.ts)          │
+│ • calculateStandardDimensions() - Single    │
+│   source of truth for all layout dimensions│
+│ • calculateBeadPosition() - Exact bead      │
+│   positioning using shared formulas        │
+└────────────┬────────────────────────────────┘
+             │
+             ├──────────────────────────────────┐
+             ↓                                  ↓
+   ┌─────────────────┐              ┌─────────────────┐
+   │ AbacusStatic    │              │ AbacusReact     │
+   │ (Server/Static) │              │ (Interactive)   │
+   └────────┬────────┘              └────────┬────────┘
+            │                                │
+            └────────────┬───────────────────┘
+                         ↓
+             ┌────────────────────────┐
+             │ AbacusSVGRenderer      │
+             │ • Pure SVG structure   │
+             │ • Dependency injection │
+             │ • Bead component prop  │
+             └────────────────────────┘
+                         ↓
+         ┌───────────────┴───────────────┐
+         ↓                               ↓
+   ┌──────────────┐              ┌──────────────────┐
+   │ AbacusStatic │              │ AbacusAnimated   │
+   │ Bead         │              │ Bead             │
+   │ (Simple SVG) │              │ (react-spring)   │
+   └──────────────┘              └──────────────────┘
+```
+
+**Key Components:**
+
+1. **`calculateStandardDimensions()`** - Returns complete layout dimensions (bar position, bead sizes, gaps, etc.)
+2. **`calculateBeadPosition()`** - Calculates exact x,y coordinates for any bead
+3. **`AbacusSVGRenderer`** - Shared SVG rendering component that accepts a bead component via dependency injection
+4. **`AbacusStaticBead`** - Simple SVG shapes for static display (no hooks, RSC-compatible)
+5. **`AbacusAnimatedBead`** - Client component with react-spring animations and gesture handling
+
+This architecture eliminates code duplication (~560 lines removed in the refactor) while guaranteeing pixel-perfect consistency.
+
+**When to use `AbacusStatic` vs `AbacusReact`:**
+
+| Feature | AbacusStatic | AbacusReact |
+|---------|--------------|-------------|
+| React Server Components | ✅ Yes | ❌ No (requires "use client") |
+| Client-side JavaScript | ❌ None | ✅ Yes |
+| User interaction | ❌ No | ✅ Click/drag beads |
+| Animations | ❌ No | ✅ Smooth transitions |
+| Sound effects | ❌ No | ✅ Optional sounds |
+| 3D effects | ❌ No | ✅ Yes |
+| **Visual output** | **✅ Identical** | **✅ Identical** |
+| Bundle size | 📦 Minimal | 📦 Full-featured |
+| Use cases | Preview cards, thumbnails, static pages, PDFs | Interactive tutorials, games, tools |
+
+```tsx
+// Example: Server Component with static abacus cards
+// app/flashcards/page.tsx
+import { AbacusStatic } from '@soroban/abacus-react/static'
+
+export default function FlashcardsPage() {
+  const numbers = [1, 5, 10, 25, 50, 100]
+
+  return (
+    <div className="grid grid-cols-3 gap-4">
+      {numbers.map(num => (
+        <div key={num} className="card">
+          <AbacusStatic value={num} columns="auto" compact />
+          <p>{num}</p>
+        </div>
+      ))}
+    </div>
+  )
+}
+```
+
+### Compact/Inline Display
+
+Create mini abacus displays for inline use:
+
+```tsx
+// Compact mode - automatically hides frame and optimizes spacing
+<AbacusReact
+  value={7}
+  columns={1}
+  compact={true}
+  hideInactiveBeads={true}
+  scaleFactor={0.7}
+/>
+
+// Or manually control frame visibility
+<AbacusReact
+  value={42}
+  columns={2}
+  frameVisible={false}  // Hide column posts and reckoning bar
+/>
+```
+
 ### Tutorial System
 
-Educational guidance with tooltips
+Educational guidance with tooltips and column highlighting
 
 <img src="https://raw.githubusercontent.com/antialias/soroban-abacus-flashcards/main/packages/abacus-react/examples/tutorial-mode.svg" alt="Tutorial System">
 
 ```tsx
 <AbacusReact
   value={42}
-  columns={2}
+  columns={3}
   interactive={true}
+  // Highlight the tens column with a label
+  highlightColumns={[1]}  // Highlight column index 1 (tens)
+  columnLabels={['ones', 'tens', 'hundreds']}  // Add labels to columns
   overlays={[{
     id: 'tip',
     type: 'tooltip',
-    target: { type: 'bead', columnIndex: 0, beadType: 'earth', beadPosition: 1 },
-    content: <div>Click this bead!</div>,
+    target: { type: 'bead', columnIndex: 1, beadType: 'earth', beadPosition: 1 },
+    content: <div>Click this bead in the tens column!</div>,
     offset: { x: 0, y: -30 }
   }]}
   callbacks={{
     onBeadClick: (event) => {
-      if (event.columnIndex === 0 && event.beadType === 'earth' && event.position === 1) {
-        console.log('Correct!');
+      if (event.columnIndex === 1 && event.beadType === 'earth' && event.position === 1) {
+        console.log('Correct! You clicked the tens column.');
       }
     }
   }}
 />
 ```
 
+**Column Highlighting:**
+- `highlightColumns` - Array of column indices to highlight (e.g., `[0, 2]` highlights first and third columns)
+- `columnLabels` - Optional labels displayed above each column (indexed left to right)
+
 ## 3D Enhancement
 
 Make the abacus feel tangible and satisfying with three progressive levels of 3D effects.
@@ -209,10 +389,18 @@ interface AbacusConfig {
   colorPalette?: 'default' | 'colorblind' | 'mnemonic' | 'grayscale' | 'nature';
   hideInactiveBeads?: boolean;       // Hide/show inactive beads
 
+  // Layout & Frame
+  frameVisible?: boolean;            // Show/hide column posts and reckoning bar
+  compact?: boolean;                 // Compact layout (implies frameVisible=false)
+
   // Interaction
   interactive?: boolean;             // Enable user interactions
   animated?: boolean;               // Enable animations
   gestures?: boolean;               // Enable drag gestures
+
+  // Tutorial Features
+  highlightColumns?: number[];       // Highlight specific columns by index
+  columnLabels?: string[];           // Optional labels for columns
 }
 ```
 
@@ -359,6 +547,60 @@ function AdvancedExample() {
 
 ## Hooks
 
+### useAbacusDiff
+
+Calculate bead differences between values for tutorials and animations:
+
+```tsx
+import { useAbacusDiff } from '@soroban/abacus-react';
+
+function Tutorial() {
+  const [currentValue, setCurrentValue] = useState(5);
+  const targetValue = 15;
+
+  // Get diff information: which beads need to move
+  const diff = useAbacusDiff(currentValue, targetValue);
+
+  return (
+    <div>
+      <p>{diff.summary}</p> {/* "add heaven bead in tens column, then..." */}
+      <AbacusReact
+        value={currentValue}
+        stepBeadHighlights={diff.highlights}  // Highlight beads that need to change
+        interactive
+        onValueChange={setCurrentValue}
+      />
+      <p>Changes needed: {diff.changes.length}</p>
+    </div>
+  );
+}
+```
+
+**Returns:**
+- `changes` - Array of bead movements with direction and order
+- `highlights` - Bead highlight data for stepBeadHighlights prop
+- `hasChanges` - Boolean indicating if any changes needed
+- `summary` - Human-readable description of changes (e.g., "add heaven bead in ones column")
+
+### useAbacusState
+
+Convert numbers to abacus bead states:
+
+```tsx
+import { useAbacusState } from '@soroban/abacus-react';
+
+function BeadAnalyzer() {
+  const value = 123;
+  const state = useAbacusState(value);
+
+  // Check bead positions
+  const onesHasHeaven = state[0].heavenActive;  // false (3 < 5)
+  const tensEarthCount = state[1].earthActive;  // 2 (20 = 2 tens)
+
+  return <div>Ones column heaven bead: {onesHasHeaven ? 'active' : 'inactive'}</div>;
+}
+```
+
 ### useAbacusDimensions
 
 Get exact sizing information for layout planning:
@@ -377,6 +619,149 @@ function MyComponent() {
 }
 ```
 
+## Utility Functions
+
+Low-level functions for working with abacus states and calculations:
+
+### numberToAbacusState
+
+Convert a number to bead positions:
+
+```tsx
+import { numberToAbacusState } from '@soroban/abacus-react';
+
+const state = numberToAbacusState(123, 5); // 5 columns
+// Returns: {
+//   0: { heavenActive: false, earthActive: 3 },  // ones = 3
+//   1: { heavenActive: false, earthActive: 2 },  // tens = 2
+//   2: { heavenActive: true, earthActive: 0 },   // hundreds = 1
+//   ...
+// }
+```
+
+### abacusStateToNumber
+
+Convert bead positions back to a number:
+
+```tsx
+import { abacusStateToNumber } from '@soroban/abacus-react';
+
+const state = {
+  0: { heavenActive: false, earthActive: 3 },
+  1: { heavenActive: false, earthActive: 2 },
+  2: { heavenActive: true, earthActive: 0 }
+};
+
+const value = abacusStateToNumber(state); // 123
+```
+
+### calculateBeadDiff
+
+Calculate the exact bead movements needed between two states:
+
+```tsx
+import { calculateBeadDiff, numberToAbacusState } from '@soroban/abacus-react';
+
+const fromState = numberToAbacusState(5);
+const toState = numberToAbacusState(15);
+const diff = calculateBeadDiff(fromState, toState);
+
+console.log(diff.summary); // "add heaven bead in tens column"
+console.log(diff.changes);  // Detailed array of movements with order
+```
+
+### calculateBeadDiffFromValues
+
+Convenience wrapper for calculating diff from numbers:
+
+```tsx
+import { calculateBeadDiffFromValues } from '@soroban/abacus-react';
+
+const diff = calculateBeadDiffFromValues(42, 57);
+// Equivalent to: calculateBeadDiff(numberToAbacusState(42), numberToAbacusState(57))
+```
+
+### validateAbacusValue
+
+Check if a value is within the supported range:
+
+```tsx
+import { validateAbacusValue } from '@soroban/abacus-react';
+
+const result = validateAbacusValue(123456, 5); // 5 columns max
+console.log(result.isValid);  // false
+console.log(result.error);    // "Value exceeds maximum for 5 columns (max: 99999)"
+```
+
+### areStatesEqual
+
+Compare two abacus states:
+
+```tsx
+import { areStatesEqual, numberToAbacusState } from '@soroban/abacus-react';
+
+const state1 = numberToAbacusState(123);
+const state2 = numberToAbacusState(123);
+const isEqual = areStatesEqual(state1, state2); // true
+```
+
+### calculateStandardDimensions
+
+**⚡ Core Architecture Function** - Calculate complete layout dimensions for consistent rendering.
+
+This is the **single source of truth** for all layout dimensions, used internally by both `AbacusStatic` and `AbacusReact` to guarantee pixel-perfect consistency.
+
+```tsx
+import { calculateStandardDimensions } from '@soroban/abacus-react';
+
+const dimensions = calculateStandardDimensions({
+  columns: 3,
+  scaleFactor: 1.5,
+  showNumbers: true,
+  columnLabels: ['ones', 'tens', 'hundreds']
+});
+
+// Returns complete layout info:
+// {
+//   width, height,           // SVG canvas size
+//   beadSize,                // 12 * scaleFactor (standard bead size)
+//   rodSpacing,              // 25 * scaleFactor (column spacing)
+//   rodWidth,                // 3 * scaleFactor
+//   barThickness,            // 2 * scaleFactor
+//   barY,                    // Reckoning bar Y position (30 * scaleFactor + labels)
+//   heavenY, earthY,         // Inactive bead rest positions
+//   activeGap,               // 1 * scaleFactor (gap to bar when active)
+//   inactiveGap,             // 8 * scaleFactor (gap between active/inactive)
+//   adjacentSpacing,         // 0.5 * scaleFactor (spacing between adjacent beads)
+//   padding, labelHeight, numbersHeight, totalColumns
+// }
+```
+
+**Why this matters:** Same input parameters = same exact layout dimensions = pixel-perfect visual consistency across static and interactive displays.
+
+### calculateBeadPosition
+
+**⚡ Core Architecture Function** - Calculate exact x,y coordinates for any bead.
+
+Used internally by `AbacusSVGRenderer` to position all beads consistently in both static and interactive modes.
+
+```tsx
+import { calculateBeadPosition, calculateStandardDimensions } from '@soroban/abacus-react';
+
+const dimensions = calculateStandardDimensions({ columns: 3, scaleFactor: 1 });
+const bead = {
+  type: 'heaven',
+  active: true,
+  position: 0,
+  placeValue: 1  // tens column
+};
+
+const position = calculateBeadPosition(bead, dimensions);
+// Returns: { x: 25, y: 29 }  // exact pixel coordinates
+```
+
+Useful for custom rendering or positioning tooltips/overlays relative to specific beads.
+
 ## Educational Use Cases
 
 ### Interactive Math Lessons
@@ -439,14 +824,41 @@ Full TypeScript definitions included:
 
 ```tsx
 import {
+  // Components
   AbacusReact,
+
+  // Hooks
+  useAbacusDiff,
+  useAbacusState,
+  useAbacusDimensions,
+
+  // Utility Functions
+  numberToAbacusState,
+  abacusStateToNumber,
+  calculateBeadDiff,
+  calculateBeadDiffFromValues,
+  validateAbacusValue,
+  areStatesEqual,
+  calculateStandardDimensions,  // NEW: Shared layout calculator
+  calculateBeadPosition,         // NEW: Bead position calculator
+
+  // Theme Presets
+  ABACUS_THEMES,
+
+  // Types
   AbacusConfig,
   BeadConfig,
   BeadClickEvent,
   AbacusCustomStyles,
   AbacusOverlay,
   AbacusCallbacks,
-  useAbacusDimensions
+  AbacusState,
+  BeadState,
+  BeadDiffResult,
+  BeadDiffOutput,
+  AbacusThemeName,
+  AbacusLayoutDimensions,        // NEW: Complete layout dimensions type
+  BeadPositionConfig             // NEW: Bead config for position calculation
 } from '@soroban/abacus-react';
 
 // All interfaces fully typed for excellent developer experience

packages/abacus-react/package.json

@@ -10,6 +10,11 @@
       "types": "./dist/index.d.ts",
       "import": "./dist/index.es.js",
       "require": "./dist/index.cjs.js"
+    },
+    "./static": {
+      "types": "./dist/static.d.ts",
+      "import": "./dist/static.es.js",
+      "require": "./dist/static.cjs.js"
     }
   },
   "files": [

packages/abacus-react/src/AbacusAnimatedBead.tsx

@@ -0,0 +1,390 @@
+'use client'
+
+/**
+ * AbacusAnimatedBead - Interactive bead component for AbacusReact (Core Architecture)
+ *
+ * This is the **client-side bead component** injected into AbacusSVGRenderer by AbacusReact.
+ * It provides animations and interactivity while the parent renderer handles positioning.
+ *
+ * ## Architecture Role:
+ * - Injected into `AbacusSVGRenderer` via dependency injection (BeadComponent prop)
+ * - Receives x,y position from `calculateBeadPosition()` (already calculated)
+ * - Adds animations and interactions on top of the shared layout
+ * - Used ONLY by AbacusReact (requires "use client")
+ *
+ * ## Features:
+ * - ✅ React Spring animations for smooth position changes
+ * - ✅ Drag gesture handling with @use-gesture/react
+ * - ✅ Direction indicators for tutorials (pulsing arrows)
+ * - ✅ 3D effects and gradients
+ * - ✅ Click and hover interactions
+ *
+ * ## Comparison:
+ * - `AbacusStaticBead` - Simple SVG shapes (no animations, RSC-compatible)
+ * - `AbacusAnimatedBead` - This component (animations, gestures, client-only)
+ *
+ * Both receive the same position from `calculateBeadPosition()`, ensuring visual consistency.
+ */
+
+import React, { useCallback, useRef } from 'react'
+import { useSpring, animated, to } from '@react-spring/web'
+import { useDrag } from '@use-gesture/react'
+import type { BeadComponentProps } from './AbacusSVGRenderer'
+import type { BeadConfig } from './AbacusReact'
+
+interface AnimatedBeadProps extends BeadComponentProps {
+  // Animation controls
+  enableAnimation: boolean
+  physicsConfig: any
+
+  // Gesture handling
+  enableGestures: boolean
+  onGestureToggle?: (bead: BeadConfig, direction: 'activate' | 'deactivate') => void
+
+  // Direction indicators (for tutorials)
+  showDirectionIndicator?: boolean
+  direction?: 'activate' | 'deactivate'
+  isCurrentStep?: boolean
+
+  // 3D effects
+  enhanced3d?: 'none' | 'subtle' | 'realistic' | 'delightful'
+  columnIndex?: number
+
+  // Hover state from parent abacus
+  isAbacusHovered?: boolean
+}
+
+export function AbacusAnimatedBead({
+  bead,
+  x,
+  y,
+  size,
+  shape,
+  color,
+  hideInactiveBeads,
+  customStyle,
+  onClick,
+  onMouseEnter,
+  onMouseLeave,
+  onRef,
+  enableAnimation,
+  physicsConfig,
+  enableGestures,
+  onGestureToggle,
+  showDirectionIndicator,
+  direction,
+  isCurrentStep,
+  enhanced3d = 'none',
+  columnIndex,
+  isAbacusHovered = false,
+}: AnimatedBeadProps) {
+  // x, y are already calculated by AbacusSVGRenderer
+
+  // Track hover state for showing hidden inactive beads
+  const [isHovered, setIsHovered] = React.useState(false)
+
+  // Use abacus hover if provided, otherwise use individual bead hover
+  const effectiveHoverState = isAbacusHovered || isHovered
+
+  // Spring animation for position
+  const [{ springX, springY }, api] = useSpring(() => ({
+    springX: x,
+    springY: y,
+    config: physicsConfig,
+  }))
+
+  // Arrow pulse animation for direction indicators
+  const [{ arrowPulse }, arrowApi] = useSpring(() => ({
+    arrowPulse: 1,
+    config: enableAnimation ? { tension: 200, friction: 10 } : { duration: 0 },
+  }))
+
+  const gestureStateRef = useRef({
+    isDragging: false,
+    lastDirection: null as 'activate' | 'deactivate' | null,
+    startY: 0,
+    threshold: size * 0.3,
+    hasGestureTriggered: false,
+  })
+
+  // Calculate gesture direction based on bead type
+  const getGestureDirection = useCallback(
+    (deltaY: number) => {
+      const movement = Math.abs(deltaY)
+      if (movement < gestureStateRef.current.threshold) return null
+
+      if (bead.type === 'heaven') {
+        return deltaY > 0 ? 'activate' : 'deactivate'
+      } else {
+        return deltaY < 0 ? 'activate' : 'deactivate'
+      }
+    },
+    [bead.type, size]
+  )
+
+  // Gesture handler
+  const bind = enableGestures
+    ? useDrag(
+        ({ event, movement: [, deltaY], first, active }) => {
+          if (first) {
+            event?.preventDefault()
+            gestureStateRef.current.isDragging = true
+            gestureStateRef.current.lastDirection = null
+            gestureStateRef.current.hasGestureTriggered = false
+            return
+          }
+
+          if (!active || !gestureStateRef.current.isDragging) {
+            if (!active) {
+              gestureStateRef.current.isDragging = false
+              gestureStateRef.current.lastDirection = null
+              setTimeout(() => {
+                gestureStateRef.current.hasGestureTriggered = false
+              }, 100)
+            }
+            return
+          }
+
+          const currentDirection = getGestureDirection(deltaY)
+
+          if (
+            currentDirection &&
+            currentDirection !== gestureStateRef.current.lastDirection
+          ) {
+            gestureStateRef.current.lastDirection = currentDirection
+            gestureStateRef.current.hasGestureTriggered = true
+            onGestureToggle?.(bead, currentDirection)
+          }
+        },
+        {
+          enabled: enableGestures,
+          preventDefault: true,
+        }
+      )
+    : () => ({})
+
+  // Update spring animation when position changes
+  React.useEffect(() => {
+    if (enableAnimation) {
+      api.start({ springX: x, springY: y, config: physicsConfig })
+    } else {
+      api.set({ springX: x, springY: y })
+    }
+  }, [x, y, enableAnimation, api, physicsConfig])
+
+  // Pulse animation for direction indicators
+  React.useEffect(() => {
+    if (showDirectionIndicator && direction && isCurrentStep) {
+      const startPulse = () => {
+        arrowApi.start({
+          from: { arrowPulse: 1 },
+          to: async (next) => {
+            await next({ arrowPulse: 1.3 })
+            await next({ arrowPulse: 1 })
+          },
+          loop: true,
+        })
+      }
+
+      const timeoutId = setTimeout(startPulse, 200)
+      return () => {
+        clearTimeout(timeoutId)
+        arrowApi.stop()
+      }
+    } else {
+      arrowApi.set({ arrowPulse: 1 })
+    }
+  }, [showDirectionIndicator, direction, isCurrentStep, arrowApi])
+
+  // Render bead shape
+  const renderShape = () => {
+    const halfSize = size / 2
+
+    // Determine fill - use gradient for realistic mode, otherwise use color
+    let fillValue = customStyle?.fill || color
+    if (enhanced3d === 'realistic' && columnIndex !== undefined) {
+      if (bead.type === 'heaven') {
+        fillValue = `url(#bead-gradient-${columnIndex}-heaven)`
+      } else {
+        fillValue = `url(#bead-gradient-${columnIndex}-earth-${bead.position})`
+      }
+    }
+
+    // Calculate opacity based on state and settings
+    let opacity: number
+    if (customStyle?.opacity !== undefined) {
+      // Custom opacity always takes precedence
+      opacity = customStyle.opacity
+    } else if (bead.active) {
+      // Active beads are always full opacity
+      opacity = 1
+    } else if (hideInactiveBeads && effectiveHoverState) {
+      // Inactive beads that are hidden but being hovered show at low opacity
+      opacity = 0.3
+    } else if (hideInactiveBeads) {
+      // Inactive beads that are hidden and not hovered are invisible (handled below)
+      opacity = 0
+    } else {
+      // Inactive beads when hideInactiveBeads is false are full opacity
+      opacity = 1
+    }
+
+    const stroke = customStyle?.stroke || '#000'
+    const strokeWidth = customStyle?.strokeWidth || 0.5
+
+    switch (shape) {
+      case 'diamond':
+        return (
+          <polygon
+            points={`${size * 0.7},0 ${size * 1.4},${halfSize} ${size * 0.7},${size} 0,${halfSize}`}
+            fill={fillValue}
+            stroke={stroke}
+            strokeWidth={strokeWidth}
+            opacity={opacity}
+          />
+        )
+      case 'square':
+        return (
+          <rect
+            width={size}
+            height={size}
+            fill={fillValue}
+            stroke={stroke}
+            strokeWidth={strokeWidth}
+            rx="1"
+            opacity={opacity}
+          />
+        )
+      case 'circle':
+      default:
+        return (
+          <circle
+            cx={halfSize}
+            cy={halfSize}
+            r={halfSize}
+            fill={fillValue}
+            stroke={stroke}
+            strokeWidth={strokeWidth}
+            opacity={opacity}
+          />
+        )
+    }
+  }
+
+  // Calculate offsets for shape positioning
+  const getXOffset = () => {
+    return shape === 'diamond' ? size * 0.7 : size / 2
+  }
+
+  const getYOffset = () => {
+    return size / 2
+  }
+
+  // Use animated.g if animations enabled, otherwise regular g
+  const GElement = enableAnimation ? animated.g : 'g'
+  const DirectionIndicatorG =
+    enableAnimation && showDirectionIndicator && direction ? animated.g : 'g'
+
+  // Build style object
+  // Show pointer cursor on hidden beads so users know they can interact
+  const shouldShowCursor = bead.active || !hideInactiveBeads || effectiveHoverState
+  const cursor = shouldShowCursor ? (enableGestures ? 'grab' : onClick ? 'pointer' : 'default') : 'default'
+
+  const beadStyle: any = enableAnimation
+    ? {
+        transform: to(
+          [springX, springY],
+          (sx, sy) => `translate(${sx - getXOffset()}px, ${sy - getYOffset()}px)`
+        ),
+        cursor,
+        touchAction: 'none' as const,
+        transition: 'opacity 0.2s ease-in-out',
+        pointerEvents: 'auto' as const, // Ensure hidden beads can still be hovered
+      }
+    : {
+        transform: `translate(${x - getXOffset()}px, ${y - getYOffset()}px)`,
+        cursor,
+        touchAction: 'none' as const,
+        transition: 'opacity 0.2s ease-in-out',
+        pointerEvents: 'auto' as const, // Ensure hidden beads can still be hovered
+      }
+
+  const handleClick = (event: React.MouseEvent) => {
+    // Prevent click if gesture was triggered
+    if (gestureStateRef.current.hasGestureTriggered) {
+      event.preventDefault()
+      return
+    }
+    onClick?.(bead, event)
+  }
+
+  const handleMouseEnter = (e: React.MouseEvent) => {
+    setIsHovered(true)
+    onMouseEnter?.(bead, e as any)
+  }
+
+  const handleMouseLeave = (e: React.MouseEvent) => {
+    setIsHovered(false)
+    onMouseLeave?.(bead, e as any)
+  }
+
+  return (
+    <>
+      <GElement
+        className={`abacus-bead ${bead.active ? 'active' : 'inactive'} ${hideInactiveBeads && !bead.active ? 'hidden-inactive' : ''}`}
+        data-testid={`bead-place-${bead.placeValue}-${bead.type}${bead.type === 'earth' ? `-pos-${bead.position}` : ''}`}
+        style={beadStyle}
+        {...bind()}
+        onClick={handleClick}
+        onMouseEnter={handleMouseEnter}
+        onMouseLeave={handleMouseLeave}
+        ref={(el) => onRef?.(bead, el as any)}
+      >
+        {renderShape()}
+      </GElement>
+
+      {/* Direction indicator for tutorials */}
+      {showDirectionIndicator && direction && (
+        <DirectionIndicatorG
+          className="direction-indicator"
+          style={
+            (enableAnimation
+              ? {
+                  transform: to(
+                    [springX, springY, arrowPulse],
+                    (sx, sy, pulse) => {
+                      const centerX = shape === 'diamond' ? size * 0.7 : size / 2
+                      const centerY = size / 2
+                      // Scale from center: translate to position, then translate to center, scale, translate back
+                      return `translate(${sx}px, ${sy}px) scale(${pulse}) translate(${-centerX}px, ${-centerY}px)`
+                    }
+                  ),
+                  pointerEvents: 'none' as const,
+                }
+              : {
+                  transform: `translate(${x}px, ${y}px) translate(${-(shape === 'diamond' ? size * 0.7 : size / 2)}px, ${-size / 2}px)`,
+                  pointerEvents: 'none' as const,
+                }) as any
+          }
+        >
+          <text
+            x={shape === 'diamond' ? size * 0.7 : size / 2}
+            y={size / 2}
+            textAnchor="middle"
+            dy=".35em"
+            fontSize={size * 0.7}
+            fill="#fbbf24"
+            fontWeight="bold"
+            stroke="#000"
+            strokeWidth="1.5"
+            paintOrder="stroke"
+          >
+            {bead.type === 'heaven'
+              ? (direction === 'activate' ? '↓' : '↑')
+              : (direction === 'activate' ? '↑' : '↓')}
+          </text>
+        </DirectionIndicatorG>
+      )}
+    </>
+  )
+}

packages/abacus-react/src/AbacusHooks.ts

@@ -0,0 +1,71 @@
+/**
+ * Utility hooks for working with abacus calculations and state
+ */
+
+import { useMemo } from 'react'
+import {
+  calculateBeadDiffFromValues,
+  numberToAbacusState,
+  type BeadDiffOutput,
+  type AbacusState,
+} from './AbacusUtils'
+
+/**
+ * Hook to calculate bead differences between two values
+ * Useful for tutorials, animations, and highlighting which beads need to move
+ *
+ * @param fromValue - Starting value
+ * @param toValue - Target value
+ * @param maxPlaces - Maximum number of place values to consider (default: 5)
+ * @returns BeadDiffOutput with changes, highlights, and summary
+ *
+ * @example
+ * ```tsx
+ * function Tutorial() {
+ *   const diff = useAbacusDiff(5, 15)
+ *
+ *   return (
+ *     <AbacusReact
+ *       value={currentValue}
+ *       stepBeadHighlights={diff.highlights}
+ *     />
+ *   )
+ * }
+ * ```
+ */
+export function useAbacusDiff(
+  fromValue: number | bigint,
+  toValue: number | bigint,
+  maxPlaces: number = 5
+): BeadDiffOutput {
+  return useMemo(() => {
+    return calculateBeadDiffFromValues(fromValue, toValue, maxPlaces)
+  }, [fromValue, toValue, maxPlaces])
+}
+
+/**
+ * Hook to convert a number to abacus state
+ * Memoized for performance when used in components
+ *
+ * @param value - The number to convert
+ * @param maxPlaces - Maximum number of place values (default: 5)
+ * @returns AbacusState representing the bead positions
+ *
+ * @example
+ * ```tsx
+ * function MyComponent() {
+ *   const state = useAbacusState(123)
+ *
+ *   // Check if ones column has heaven bead active
+ *   const onesHasHeaven = state[0].heavenActive
+ * }
+ * ```
+ */
+export function useAbacusState(
+  value: number | bigint,
+  maxPlaces: number = 5
+): AbacusState {
+  return useMemo(() => {
+    return numberToAbacusState(value, maxPlaces)
+  }, [value, maxPlaces])
+}

packages/abacus-react/src/AbacusReact.themes-and-utilities.stories.tsx

@@ -0,0 +1,613 @@
+/**
+ * Theme system, layout utilities, hooks, and helper functions
+ * Features: Theme presets, compact mode, column highlighting, hooks, utility functions
+ */
+
+import type { Meta, StoryObj } from '@storybook/react';
+import React, { useState } from 'react';
+import AbacusReact from './AbacusReact';
+import {
+  ABACUS_THEMES,
+  AbacusThemeName,
+  useAbacusDiff,
+  useAbacusState,
+  numberToAbacusState,
+  abacusStateToNumber,
+  calculateBeadDiffFromValues,
+  validateAbacusValue,
+  areStatesEqual
+} from './index';
+
+const meta = {
+  title: 'AbacusReact/Themes & Utilities',
+  component: AbacusReact,
+  parameters: {
+    layout: 'centered',
+  },
+  tags: ['autodocs'],
+} satisfies Meta<typeof AbacusReact>;
+
+export default meta;
+type Story = StoryObj<typeof meta>;
+
+// ============================================================================
+// THEME PRESETS
+// ============================================================================
+
+export const AllThemePresets: Story = {
+  render: () => {
+    const themes: AbacusThemeName[] = ['light', 'dark', 'trophy', 'translucent', 'solid', 'traditional'];
+
+    return (
+      <div style={{ display: 'flex', flexDirection: 'column', gap: '30px', padding: '20px' }}>
+        <h2>Theme Presets</h2>
+        <p>Pre-defined themes eliminate manual style object creation</p>
+
+        {themes.map((themeName) => (
+          <div key={themeName} style={{
+            background: themeName === 'dark' ? '#1a1a1a' : '#f5f5f5',
+            padding: '20px',
+            borderRadius: '8px'
+          }}>
+            <h3 style={{
+              marginTop: 0,
+              color: themeName === 'dark' ? 'white' : 'black',
+              textTransform: 'capitalize'
+            }}>
+              {themeName} Theme
+            </h3>
+            <AbacusReact
+              value={12345}
+              columns={5}
+              customStyles={ABACUS_THEMES[themeName]}
+              showNumbers={true}
+            />
+          </div>
+        ))}
+      </div>
+    );
+  },
+};
+
+export const LightTheme: Story = {
+  render: () => (
+    <div style={{ padding: '20px', background: '#f5f5f5' }}>
+      <h3>Light Theme - Best for light backgrounds</h3>
+      <AbacusReact
+        value={12345}
+        columns={5}
+        customStyles={ABACUS_THEMES.light}
+        showNumbers={true}
+      />
+    </div>
+  ),
+};
+
+export const DarkTheme: Story = {
+  render: () => (
+    <div style={{ padding: '20px', background: '#1a1a1a' }}>
+      <h3 style={{ color: 'white' }}>Dark Theme - Best for dark backgrounds</h3>
+      <AbacusReact
+        value={12345}
+        columns={5}
+        customStyles={ABACUS_THEMES.dark}
+        showNumbers={true}
+      />
+    </div>
+  ),
+};
+
+export const TrophyTheme: Story = {
+  render: () => (
+    <div style={{ padding: '20px', background: '#f0f0f0' }}>
+      <h3>Trophy Theme - Golden frame for achievements</h3>
+      <AbacusReact
+        value={9999}
+        columns={4}
+        customStyles={ABACUS_THEMES.trophy}
+        showNumbers={true}
+      />
+    </div>
+  ),
+};
+
+export const TraditionalTheme: Story = {
+  render: () => (
+    <div style={{ padding: '20px', background: '#f5f5f0' }}>
+      <h3>Traditional Theme - Brown wooden soroban aesthetic</h3>
+      <AbacusReact
+        value={8765}
+        columns={4}
+        customStyles={ABACUS_THEMES.traditional}
+        showNumbers={true}
+      />
+    </div>
+  ),
+};
+
+// ============================================================================
+// COMPACT MODE & FRAME VISIBILITY
+// ============================================================================
+
+export const CompactMode: Story = {
+  render: () => (
+    <div style={{ padding: '20px' }}>
+      <h3>Compact Mode - Inline mini-abacus displays</h3>
+      <p>Perfect for inline number displays, badges, or game UI</p>
+
+      <div style={{ display: 'flex', gap: '20px', alignItems: 'center', marginTop: '20px' }}>
+        <span>Single digits: </span>
+        {[1, 2, 3, 4, 5, 6, 7, 8, 9].map(num => (
+          <AbacusReact
+            key={num}
+            value={num}
+            columns={1}
+            compact={true}
+            hideInactiveBeads={true}
+            scaleFactor={0.6}
+          />
+        ))}
+      </div>
+
+      <div style={{ marginTop: '30px' }}>
+        <h4>Two-digit compact displays:</h4>
+        <div style={{ display: 'flex', gap: '15px', alignItems: 'center' }}>
+          {[12, 34, 56, 78, 99].map(num => (
+            <AbacusReact
+              key={num}
+              value={num}
+              columns={2}
+              compact={true}
+              hideInactiveBeads={true}
+              scaleFactor={0.7}
+            />
+          ))}
+        </div>
+      </div>
+    </div>
+  ),
+};
+
+export const FrameVisibilityControl: Story = {
+  render: () => {
+    const [frameVisible, setFrameVisible] = useState(true);
+
+    return (
+      <div style={{ padding: '20px' }}>
+        <h3>Frame Visibility Control</h3>
+        <p>Toggle column posts and reckoning bar on/off</p>
+
+        <div style={{ marginBottom: '20px' }}>
+          <label>
+            <input
+              type="checkbox"
+              checked={frameVisible}
+              onChange={(e) => setFrameVisible(e.target.checked)}
+            />
+            {' '}Show Frame
+          </label>
+        </div>
+
+        <AbacusReact
+          value={12345}
+          columns={5}
+          frameVisible={frameVisible}
+          showNumbers={true}
+        />
+      </div>
+    );
+  },
+};
+
+// ============================================================================
+// COLUMN HIGHLIGHTING & LABELS
+// ============================================================================
+
+export const ColumnHighlighting: Story = {
+  render: () => (
+    <div style={{ padding: '20px' }}>
+      <h3>Column Highlighting</h3>
+      <p>Highlight specific columns for educational purposes</p>
+
+      <div style={{ marginBottom: '30px' }}>
+        <h4>Highlight ones column:</h4>
+        <AbacusReact
+          value={12345}
+          columns={5}
+          highlightColumns={[0]}
+          showNumbers={true}
+        />
+      </div>
+
+      <div style={{ marginBottom: '30px' }}>
+        <h4>Highlight tens and hundreds:</h4>
+        <AbacusReact
+          value={12345}
+          columns={5}
+          highlightColumns={[1, 2]}
+          showNumbers={true}
+        />
+      </div>
+
+      <div>
+        <h4>Highlight all columns:</h4>
+        <AbacusReact
+          value={12345}
+          columns={5}
+          highlightColumns={[0, 1, 2, 3, 4]}
+          showNumbers={true}
+        />
+      </div>
+    </div>
+  ),
+};
+
+export const ColumnLabels: Story = {
+  render: () => (
+    <div style={{ padding: '20px' }}>
+      <h3>Column Labels</h3>
+      <p>Add educational labels above columns</p>
+
+      <div style={{ marginBottom: '30px' }}>
+        <h4>Standard place value labels:</h4>
+        <AbacusReact
+          value={12345}
+          columns={5}
+          columnLabels={['ones', 'tens', 'hundreds', 'thousands', '10k']}
+          showNumbers={true}
+        />
+      </div>
+
+      <div>
+        <h4>Custom labels:</h4>
+        <AbacusReact
+          value={789}
+          columns={3}
+          columnLabels={['1s', '10s', '100s']}
+          highlightColumns={[1]}
+          showNumbers={true}
+        />
+      </div>
+    </div>
+  ),
+};
+
+export const ColumnHighlightingWithLabels: Story = {
+  render: () => (
+    <div style={{ padding: '20px' }}>
+      <h3>Combined: Column Highlighting + Labels</h3>
+      <p>Perfect for tutorials showing which column to work with</p>
+
+      <AbacusReact
+        value={42}
+        columns={3}
+        highlightColumns={[1]}
+        columnLabels={['ones', 'tens', 'hundreds']}
+        showNumbers={true}
+      />
+
+      <p style={{ marginTop: '20px', fontStyle: 'italic' }}>
+        "Add 10 to the tens column"
+      </p>
+    </div>
+  ),
+};
+
+// ============================================================================
+// HOOKS: useAbacusDiff
+// ============================================================================
+
+function AbacusDiffDemo() {
+  const [currentValue, setCurrentValue] = useState(5);
+  const targetValue = 23;
+
+  const diff = useAbacusDiff(currentValue, targetValue);
+
+  return (
+    <div style={{ padding: '20px' }}>
+      <h3>useAbacusDiff Hook</h3>
+      <p>Automatically calculate which beads need to move</p>
+
+      <div style={{ marginBottom: '20px' }}>
+        <p><strong>Current value:</strong> {currentValue}</p>
+        <p><strong>Target value:</strong> {targetValue}</p>
+        <p><strong>Instructions:</strong> {diff.summary}</p>
+        <p><strong>Changes needed:</strong> {diff.changes.length}</p>
+      </div>
+
+      <AbacusReact
+        value={currentValue}
+        columns={2}
+        stepBeadHighlights={diff.highlights}
+        showNumbers={true}
+        interactive={true}
+        onValueChange={setCurrentValue}
+      />
+
+      <div style={{ marginTop: '20px' }}>
+        <button onClick={() => setCurrentValue(5)}>Reset to 5</button>
+        {' '}
+        <button onClick={() => setCurrentValue(targetValue)}>Jump to target (23)</button>
+      </div>
+
+      {diff.hasChanges ? (
+        <div style={{ marginTop: '20px', color: '#666' }}>
+          <p><strong>Detailed changes:</strong></p>
+          <pre style={{ fontSize: '12px' }}>
+            {JSON.stringify(diff.changes, null, 2)}
+          </pre>
+        </div>
+      ) : (
+        <p style={{ marginTop: '20px', color: 'green', fontWeight: 'bold' }}>
+          ✓ Target reached!
+        </p>
+      )}
+    </div>
+  );
+}
+
+export const UseAbacusDiffHook: Story = {
+  render: () => <AbacusDiffDemo />,
+};
+
+// ============================================================================
+// HOOKS: useAbacusState
+// ============================================================================
+
+function AbacusStateDemo() {
+  const [value, setValue] = useState(123);
+  const state = useAbacusState(value);
+
+  return (
+    <div style={{ padding: '20px' }}>
+      <h3>useAbacusState Hook</h3>
+      <p>Convert numbers to bead positions (memoized)</p>
+
+      <div style={{ marginBottom: '20px' }}>
+        <label>
+          Value:
+          <input
+            type="number"
+            value={value}
+            onChange={(e) => setValue(parseInt(e.target.value) || 0)}
+            style={{ marginLeft: '10px', width: '100px' }}
+          />
+        </label>
+      </div>
+
+      <AbacusReact
+        value={value}
+        columns={3}
+        showNumbers={true}
+      />
+
+      <div style={{ marginTop: '20px', fontSize: '14px' }}>
+        <p><strong>Bead State Analysis:</strong></p>
+        <table style={{ borderCollapse: 'collapse', marginTop: '10px' }}>
+          <thead>
+            <tr style={{ background: '#f0f0f0' }}>
+              <th style={{ border: '1px solid #ccc', padding: '8px' }}>Place</th>
+              <th style={{ border: '1px solid #ccc', padding: '8px' }}>Heaven Active?</th>
+              <th style={{ border: '1px solid #ccc', padding: '8px' }}>Earth Count</th>
+              <th style={{ border: '1px solid #ccc', padding: '8px' }}>Digit</th>
+            </tr>
+          </thead>
+          <tbody>
+            {[0, 1, 2].map(place => {
+              const placeState = state[place];
+              const digit = (placeState.heavenActive ? 5 : 0) + placeState.earthActive;
+              const placeName = ['Ones', 'Tens', 'Hundreds'][place];
+
+              return (
+                <tr key={place}>
+                  <td style={{ border: '1px solid #ccc', padding: '8px' }}>{placeName}</td>
+                  <td style={{ border: '1px solid #ccc', padding: '8px', textAlign: 'center' }}>
+                    {placeState.heavenActive ? '✓' : '✗'}
+                  </td>
+                  <td style={{ border: '1px solid #ccc', padding: '8px', textAlign: 'center' }}>
+                    {placeState.earthActive}
+                  </td>
+                  <td style={{ border: '1px solid #ccc', padding: '8px', textAlign: 'center' }}>
+                    {digit}
+                  </td>
+                </tr>
+              );
+            })}
+          </tbody>
+        </table>
+      </div>
+    </div>
+  );
+}
+
+export const UseAbacusStateHook: Story = {
+  render: () => <AbacusStateDemo />,
+};
+
+// ============================================================================
+// UTILITY FUNCTIONS
+// ============================================================================
+
+function UtilityFunctionsDemo() {
+  const [inputValue, setInputValue] = useState(123);
+
+  const state = numberToAbacusState(inputValue, 5);
+  const backToNumber = abacusStateToNumber(state);
+
+  const fromValue = 42;
+  const toValue = 57;
+  const diff = calculateBeadDiffFromValues(fromValue, toValue);
+
+  const validation1 = validateAbacusValue(inputValue, 5);
+  const validation2 = validateAbacusValue(123456, 5);
+
+  const state1 = numberToAbacusState(100);
+  const state2 = numberToAbacusState(100);
+  const state3 = numberToAbacusState(200);
+  const areEqual1 = areStatesEqual(state1, state2);
+  const areEqual2 = areStatesEqual(state1, state3);
+
+  return (
+    <div style={{ padding: '20px' }}>
+      <h3>Utility Functions</h3>
+      <p>Low-level functions for working with abacus states</p>
+
+      <div style={{ marginBottom: '30px' }}>
+        <h4>numberToAbacusState & abacusStateToNumber:</h4>
+        <label>
+          Input value:
+          <input
+            type="number"
+            value={inputValue}
+            onChange={(e) => setInputValue(parseInt(e.target.value) || 0)}
+            style={{ marginLeft: '10px', width: '100px' }}
+          />
+        </label>
+        <pre style={{ background: '#f5f5f5', padding: '10px', marginTop: '10px', fontSize: '12px' }}>
+          {`numberToAbacusState(${inputValue}, 5) = ${JSON.stringify(state, null, 2)}`}
+        </pre>
+        <pre style={{ background: '#f5f5f5', padding: '10px', fontSize: '12px' }}>
+          {`abacusStateToNumber(state) = ${backToNumber}`}
+        </pre>
+      </div>
+
+      <div style={{ marginBottom: '30px' }}>
+        <h4>calculateBeadDiffFromValues:</h4>
+        <p>From {fromValue} to {toValue}:</p>
+        <pre style={{ background: '#f5f5f5', padding: '10px', fontSize: '12px' }}>
+          {`Summary: ${diff.summary}\nChanges: ${diff.changes.length}`}
+        </pre>
+      </div>
+
+      <div style={{ marginBottom: '30px' }}>
+        <h4>validateAbacusValue:</h4>
+        <pre style={{ background: '#f5f5f5', padding: '10px', fontSize: '12px' }}>
+          {`validateAbacusValue(${inputValue}, 5):\n  isValid: ${validation1.isValid}\n  error: ${validation1.error || 'none'}`}
+        </pre>
+        <pre style={{ background: '#f5f5f5', padding: '10px', fontSize: '12px' }}>
+          {`validateAbacusValue(123456, 5):\n  isValid: ${validation2.isValid}\n  error: ${validation2.error || 'none'}`}
+        </pre>
+      </div>
+
+      <div>
+        <h4>areStatesEqual:</h4>
+        <pre style={{ background: '#f5f5f5', padding: '10px', fontSize: '12px' }}>
+          {`areStatesEqual(state(100), state(100)) = ${areEqual1}\nareStatesEqual(state(100), state(200)) = ${areEqual2}`}
+        </pre>
+      </div>
+    </div>
+  );
+}
+
+export const UtilityFunctions: Story = {
+  render: () => <UtilityFunctionsDemo />,
+};
+
+// ============================================================================
+// COMBINED FEATURES
+// ============================================================================
+
+export const AllFeaturesShowcase: Story = {
+  render: () => {
+    const [value, setValue] = useState(42);
+    const targetValue = 75;
+    const diff = useAbacusDiff(value, targetValue);
+
+    return (
+      <div style={{ padding: '20px', maxWidth: '800px' }}>
+        <h2>All New Features Combined</h2>
+        <p>Theme preset + column highlighting + labels + diff hook</p>
+
+        <div style={{
+          background: '#1a1a1a',
+          padding: '30px',
+          borderRadius: '8px',
+          marginTop: '20px'
+        }}>
+          <h3 style={{ color: 'white', marginTop: 0 }}>
+            Tutorial: Add to reach {targetValue}
+          </h3>
+
+          <p style={{ color: '#ccc' }}>
+            <strong>Current:</strong> {value} → <strong>Target:</strong> {targetValue}
+          </p>
+          <p style={{ color: '#fbbf24' }}>
+            <strong>Instructions:</strong> {diff.summary}
+          </p>
+
+          <AbacusReact
+            value={value}
+            columns={2}
+            customStyles={ABACUS_THEMES.dark}
+            highlightColumns={[0, 1]}
+            columnLabels={['ones', 'tens']}
+            stepBeadHighlights={diff.highlights}
+            showNumbers={true}
+            interactive={true}
+            onValueChange={setValue}
+          />
+
+          <div style={{ marginTop: '20px' }}>
+            <button onClick={() => setValue(42)}>Reset</button>
+            {' '}
+            <button onClick={() => setValue(targetValue)}>Show Answer</button>
+          </div>
+
+          {!diff.hasChanges && (
+            <p style={{ color: '#4ade80', fontWeight: 'bold', marginTop: '20px' }}>
+              🎉 Perfect! You reached the target!
+            </p>
+          )}
+        </div>
+      </div>
+    );
+  },
+};
+
+export const CompactThemeComparison: Story = {
+  render: () => {
+    const themes: AbacusThemeName[] = ['light', 'dark', 'trophy', 'traditional'];
+
+    return (
+      <div style={{ padding: '20px' }}>
+        <h3>Compact Mode with Different Themes</h3>
+        <p>Inline displays work with all theme presets</p>
+
+        <div style={{ display: 'flex', flexDirection: 'column', gap: '20px', marginTop: '20px' }}>
+          {themes.map(theme => (
+            <div
+              key={theme}
+              style={{
+                background: theme === 'dark' ? '#1a1a1a' : '#f5f5f5',
+                padding: '15px',
+                borderRadius: '6px'
+              }}
+            >
+              <h4 style={{
+                margin: '0 0 15px 0',
+                color: theme === 'dark' ? 'white' : 'black',
+                textTransform: 'capitalize'
+              }}>
+                {theme}:
+              </h4>
+              <div style={{ display: 'flex', gap: '15px', alignItems: 'center' }}>
+                {[7, 42, 99].map(num => (
+                  <div key={num}>
+                    <AbacusReact
+                      value={num}
+                      columns={num < 10 ? 1 : 2}
+                      compact={true}
+                      hideInactiveBeads={true}
+                      customStyles={ABACUS_THEMES[theme]}
+                      scaleFactor={0.7}
+                    />
+                  </div>
+                ))}
+              </div>
+            </div>
+          ))}
+        </div>
+      </div>
+    );
+  },
+};

packages/abacus-react/src/AbacusSVGRenderer.tsx

@@ -0,0 +1,383 @@
+/**
+ * AbacusSVGRenderer - Shared SVG rendering component (Core Architecture)
+ *
+ * This is the **single SVG renderer** used by both AbacusStatic and AbacusReact to guarantee
+ * pixel-perfect visual consistency. It implements dependency injection to support different
+ * bead components while maintaining identical layout.
+ *
+ * ## Architecture Role:
+ * ```
+ * AbacusStatic + AbacusReact
+ *         ↓
+ * calculateStandardDimensions() ← Single source for all layout dimensions
+ *         ↓
+ * AbacusSVGRenderer ← This component (shared structure)
+ *         ↓
+ * calculateBeadPosition() ← Exact positioning for every bead
+ *         ↓
+ * BeadComponent (injected) ← AbacusStaticBead OR AbacusAnimatedBead
+ * ```
+ *
+ * ## Key Features:
+ * - ✅ No "use client" directive - works in React Server Components
+ * - ✅ No hooks or state - pure rendering from props
+ * - ✅ Dependency injection for bead components
+ * - ✅ Supports 3D gradients, background glows, overlays (via props)
+ * - ✅ Same props → same dimensions → same positions → same layout
+ *
+ * ## Why This Matters:
+ * Before this architecture, AbacusStatic and AbacusReact had ~700 lines of duplicate
+ * SVG rendering code with separate dimension calculations. This led to layout inconsistencies.
+ * Now they share this single renderer, eliminating duplication and guaranteeing consistency.
+ */
+
+import React from 'react'
+import type { AbacusLayoutDimensions } from './AbacusUtils'
+import type { BeadConfig, AbacusCustomStyles, ValidPlaceValues } from './AbacusReact'
+import { numberToAbacusState, calculateBeadPosition, type AbacusState } from './AbacusUtils'
+
+/**
+ * Props that bead components must accept
+ */
+export interface BeadComponentProps {
+  bead: BeadConfig
+  x: number
+  y: number
+  size: number
+  shape: 'circle' | 'diamond' | 'square'
+  color: string
+  hideInactiveBeads: boolean
+  customStyle?: {
+    fill?: string
+    stroke?: string
+    strokeWidth?: number
+    opacity?: number
+  }
+  onClick?: (bead: BeadConfig, event?: React.MouseEvent) => void
+  onMouseEnter?: (bead: BeadConfig, event?: React.MouseEvent) => void
+  onMouseLeave?: (bead: BeadConfig, event?: React.MouseEvent) => void
+  onRef?: (bead: BeadConfig, element: SVGElement | null) => void
+}
+
+/**
+ * Props for the SVG renderer
+ */
+export interface AbacusSVGRendererProps {
+  // Core data
+  value: number | bigint
+  columns: number
+  state: AbacusState
+  beadConfigs: BeadConfig[][]  // Array of columns, each containing beads
+
+  // Layout
+  dimensions: AbacusLayoutDimensions
+  scaleFactor?: number
+
+  // Appearance
+  beadShape: 'circle' | 'diamond' | 'square'
+  colorScheme: string
+  colorPalette: string
+  hideInactiveBeads: boolean
+  frameVisible: boolean
+  showNumbers: boolean
+  customStyles?: AbacusCustomStyles
+  interactive?: boolean  // Enable interactive CSS styles
+
+  // Tutorial features
+  highlightColumns?: number[]
+  columnLabels?: string[]
+
+  // 3D Enhancement (optional - only used by AbacusReact)
+  defsContent?: React.ReactNode  // Custom defs content (gradients, patterns, etc.)
+
+  // Additional content (overlays, etc.)
+  children?: React.ReactNode  // Rendered at the end of the SVG
+
+  // Dependency injection
+  BeadComponent: React.ComponentType<any>  // Accept any bead component (base props + extra props)
+  getBeadColor: (bead: BeadConfig, totalColumns: number, colorScheme: string, colorPalette: string) => string
+
+  // Event handlers (optional, passed through to beads)
+  onBeadClick?: (bead: BeadConfig, event?: React.MouseEvent) => void
+  onBeadMouseEnter?: (bead: BeadConfig, event?: React.MouseEvent) => void
+  onBeadMouseLeave?: (bead: BeadConfig, event?: React.MouseEvent) => void
+  onBeadRef?: (bead: BeadConfig, element: SVGElement | null) => void
+
+  // Extra props calculator (for animations, gestures, etc.)
+  // This function is called for each bead to get extra props
+  calculateExtraBeadProps?: (bead: BeadConfig, baseProps: BeadComponentProps) => Record<string, any>
+}
+
+/**
+ * Pure SVG renderer for abacus
+ * Uses dependency injection to support both static and animated beads
+ */
+export function AbacusSVGRenderer({
+  value,
+  columns,
+  state,
+  beadConfigs,
+  dimensions,
+  scaleFactor = 1,
+  beadShape,
+  colorScheme,
+  colorPalette,
+  hideInactiveBeads,
+  frameVisible,
+  showNumbers,
+  customStyles,
+  interactive = false,
+  highlightColumns = [],
+  columnLabels = [],
+  defsContent,
+  children,
+  BeadComponent,
+  getBeadColor,
+  onBeadClick,
+  onBeadMouseEnter,
+  onBeadMouseLeave,
+  onBeadRef,
+  calculateExtraBeadProps,
+}: AbacusSVGRendererProps) {
+  const { width, height, rodSpacing, barY, beadSize, barThickness, labelHeight, numbersHeight } = dimensions
+
+  return (
+    <svg
+      xmlns="http://www.w3.org/2000/svg"
+      width={width * scaleFactor}
+      height={height * scaleFactor}
+      viewBox={`0 0 ${width} ${height}`}
+      className={`abacus-svg ${hideInactiveBeads ? 'hide-inactive-mode' : ''} ${interactive ? 'interactive' : ''}`}
+      style={{ overflow: 'visible', display: 'block' }}
+    >
+      <defs>
+        <style>{`
+          /* CSS-based opacity system for hidden inactive beads */
+          .abacus-bead {
+            transition: opacity 0.2s ease-in-out;
+          }
+
+          /* Hidden inactive beads are invisible by default */
+          .hide-inactive-mode .abacus-bead.hidden-inactive {
+            opacity: 0;
+          }
+
+          /* Interactive abacus: When hovering over the abacus, hidden inactive beads become semi-transparent */
+          .abacus-svg.hide-inactive-mode.interactive:hover .abacus-bead.hidden-inactive {
+            opacity: 0.5;
+          }
+
+          /* Interactive abacus: When hovering over a specific hidden inactive bead, it becomes fully visible */
+          .hide-inactive-mode.interactive .abacus-bead.hidden-inactive:hover {
+            opacity: 1 !important;
+          }
+
+          /* Non-interactive abacus: Hidden inactive beads always stay at opacity 0 */
+          .abacus-svg.hide-inactive-mode:not(.interactive) .abacus-bead.hidden-inactive {
+            opacity: 0 !important;
+          }
+        `}</style>
+
+        {/* Custom defs content (for 3D gradients, patterns, etc.) */}
+        {defsContent}
+      </defs>
+
+      {/* Background glow effects - rendered behind everything */}
+      {Array.from({ length: columns }, (_, colIndex) => {
+        const placeValue = columns - 1 - colIndex
+        const columnStyles = customStyles?.columns?.[colIndex]
+        const backgroundGlow = columnStyles?.backgroundGlow
+
+        if (!backgroundGlow) return null
+
+        const x = colIndex * rodSpacing + rodSpacing / 2
+        const glowWidth = rodSpacing + (backgroundGlow.spread || 0)
+        const glowHeight = height + (backgroundGlow.spread || 0)
+
+        return (
+          <rect
+            key={`background-glow-pv${placeValue}`}
+            x={x - glowWidth / 2}
+            y={-(backgroundGlow.spread || 0) / 2}
+            width={glowWidth}
+            height={glowHeight}
+            fill={backgroundGlow.fill || 'rgba(59, 130, 246, 0.2)'}
+            filter={backgroundGlow.blur ? `blur(${backgroundGlow.blur}px)` : 'none'}
+            opacity={backgroundGlow.opacity ?? 0.6}
+            rx={8}
+            style={{ pointerEvents: 'none' }}
+          />
+        )
+      })}
+
+      {/* Column highlights */}
+      {highlightColumns.map((colIndex) => {
+        if (colIndex < 0 || colIndex >= columns) return null
+
+        const x = colIndex * rodSpacing + rodSpacing / 2
+        const highlightWidth = rodSpacing * 0.9
+        const highlightHeight = height - labelHeight - numbersHeight
+
+        return (
+          <rect
+            key={`column-highlight-${colIndex}`}
+            x={x - highlightWidth / 2}
+            y={labelHeight}
+            width={highlightWidth}
+            height={highlightHeight}
+            fill="rgba(59, 130, 246, 0.15)"
+            stroke="rgba(59, 130, 246, 0.4)"
+            strokeWidth={2}
+            rx={6}
+            style={{ pointerEvents: 'none' }}
+          />
+        )
+      })}
+
+      {/* Column labels */}
+      {columnLabels.map((label, colIndex) => {
+        if (!label || colIndex >= columns) return null
+
+        const x = colIndex * rodSpacing + rodSpacing / 2
+
+        return (
+          <text
+            key={`column-label-${colIndex}`}
+            x={x}
+            y={labelHeight / 2 + 5}
+            textAnchor="middle"
+            fontSize="14"
+            fontWeight="600"
+            fill="rgba(0, 0, 0, 0.7)"
+            style={{ pointerEvents: 'none', userSelect: 'none' }}
+          >
+            {label}
+          </text>
+        )
+      })}
+
+      {/* Rods (column posts) */}
+      {frameVisible && beadConfigs.map((_, colIndex) => {
+        const placeValue = columns - 1 - colIndex
+        const x = colIndex * rodSpacing + rodSpacing / 2
+
+        // Apply custom column post styling (column-specific overrides global)
+        const columnStyles = customStyles?.columns?.[colIndex]
+        const globalColumnPosts = customStyles?.columnPosts
+        const rodStyle = {
+          fill: columnStyles?.columnPost?.fill || globalColumnPosts?.fill || 'rgb(0, 0, 0, 0.1)',
+          stroke: columnStyles?.columnPost?.stroke || globalColumnPosts?.stroke || 'none',
+          strokeWidth: columnStyles?.columnPost?.strokeWidth ?? globalColumnPosts?.strokeWidth ?? 0,
+          opacity: columnStyles?.columnPost?.opacity ?? globalColumnPosts?.opacity ?? 1,
+        }
+
+        return (
+          <rect
+            key={`rod-pv${placeValue}`}
+            x={x - dimensions.rodWidth / 2}
+            y={labelHeight}
+            width={dimensions.rodWidth}
+            height={height - labelHeight - numbersHeight}
+            fill={rodStyle.fill}
+            stroke={rodStyle.stroke}
+            strokeWidth={rodStyle.strokeWidth}
+            opacity={rodStyle.opacity}
+            className="column-post"
+          />
+        )
+      })}
+
+      {/* Reckoning bar */}
+      {frameVisible && (
+        <rect
+          x={0}
+          y={barY}
+          width={columns * rodSpacing}
+          height={barThickness}
+          fill={customStyles?.reckoningBar?.fill || 'rgb(0, 0, 0, 0.15)'}
+          stroke={customStyles?.reckoningBar?.stroke || 'rgba(0, 0, 0, 0.3)'}
+          strokeWidth={customStyles?.reckoningBar?.strokeWidth || 2}
+          opacity={customStyles?.reckoningBar?.opacity ?? 1}
+        />
+      )}
+
+      {/* Beads - delegated to injected component */}
+      {beadConfigs.map((columnBeads, colIndex) => {
+        const placeValue = columns - 1 - colIndex
+        // Get column state for inactive earth bead positioning
+        const columnState = state[placeValue] || { heavenActive: false, earthActive: 0 }
+
+        return (
+          <g key={`column-${colIndex}`}>
+            {columnBeads.map((bead, beadIndex) => {
+              // Calculate position using shared utility with column state for accurate positioning
+              const position = calculateBeadPosition(bead, dimensions, { earthActive: columnState.earthActive })
+              const color = getBeadColor(bead, columns, colorScheme, colorPalette)
+
+              // Get custom style for this specific bead
+              const customStyle =
+                bead.type === 'heaven'
+                  ? customStyles?.heavenBeads
+                  : customStyles?.earthBeads
+
+              // Build base props
+              const baseProps: BeadComponentProps = {
+                bead,
+                x: position.x,
+                y: position.y,
+                size: beadSize,
+                shape: beadShape,
+                color,
+                hideInactiveBeads,
+                customStyle,
+                onClick: onBeadClick,
+                onMouseEnter: onBeadMouseEnter,
+                onMouseLeave: onBeadMouseLeave,
+                onRef: onBeadRef,
+              }
+
+              // Calculate extra props if provided (for animations, etc.)
+              const extraProps = calculateExtraBeadProps?.(bead, baseProps) || {}
+
+              return (
+                <BeadComponent
+                  key={`bead-pv${bead.placeValue}-${bead.type}-${bead.position}`}
+                  {...baseProps}
+                  {...extraProps}
+                />
+              )
+            })}
+          </g>
+        )
+      })}
+
+      {/* Column numbers */}
+      {showNumbers && beadConfigs.map((_, colIndex) => {
+        const placeValue = columns - 1 - colIndex
+        const columnState = state[placeValue] || { heavenActive: false, earthActive: 0 }
+        const digit = (columnState.heavenActive ? 5 : 0) + columnState.earthActive
+        const x = colIndex * rodSpacing + rodSpacing / 2
+
+        return (
+          <text
+            key={`number-${colIndex}`}
+            x={x}
+            y={height - numbersHeight / 2 + 5}
+            textAnchor="middle"
+            fontSize={customStyles?.numerals?.fontSize || '16px'}
+            fontWeight={customStyles?.numerals?.fontWeight || '600'}
+            fill={customStyles?.numerals?.color || 'rgba(0, 0, 0, 0.8)'}
+            style={{ pointerEvents: 'none', userSelect: 'none' }}
+          >
+            {digit}
+          </text>
+        )
+      })}
+
+      {/* Additional content (overlays, numbers, etc.) */}
+      {children}
+    </svg>
+  )
+}
+
+export default AbacusSVGRenderer

packages/abacus-react/src/AbacusStatic.stories.tsx

@@ -0,0 +1,283 @@
+import type { Meta, StoryObj } from '@storybook/react'
+import { AbacusStatic } from './AbacusStatic'
+import { ABACUS_THEMES } from './AbacusThemes'
+
+/**
+ * AbacusStatic - Server Component compatible static abacus
+ *
+ * ## Key Features:
+ * - ✅ Works in React Server Components (no "use client")
+ * - ✅ **Identical layout to AbacusReact** - same props = same exact SVG output
+ * - ✅ No animations, hooks, or client-side JavaScript
+ * - ✅ Lightweight rendering for static displays
+ *
+ * ## Shared Architecture (Zero Duplication!):
+ * Both AbacusStatic and AbacusReact use the **exact same rendering pipeline**:
+ *
+ * ```
+ * calculateStandardDimensions() → AbacusSVGRenderer → calculateBeadPosition()
+ *                                        ↓
+ *                    ┌───────────────────┴───────────────────┐
+ *                    ↓                                       ↓
+ *             AbacusStaticBead                    AbacusAnimatedBead
+ *             (Simple SVG)                        (react-spring)
+ * ```
+ *
+ * - `calculateStandardDimensions()` - Single source of truth for layout (beadSize, gaps, bar position, etc.)
+ * - `AbacusSVGRenderer` - Shared SVG structure with dependency injection for bead components
+ * - `calculateBeadPosition()` - Exact positioning formulas used by both variants
+ * - `AbacusStaticBead` - RSC-compatible simple SVG shapes (this component)
+ * - `AbacusAnimatedBead` - Client component with animations (AbacusReact)
+ *
+ * ## Visual Consistency Guarantee:
+ * Both AbacusStatic and AbacusReact produce **pixel-perfect identical output** for the same props.
+ * This ensures previews match interactive versions, PDFs match web displays, etc.
+ *
+ * **Architecture benefit:** ~560 lines of duplicate code eliminated. Same props = same dimensions = same positions = same layout.
+ *
+ * ## When to Use:
+ * - React Server Components (Next.js App Router)
+ * - Static site generation
+ * - Non-interactive previews
+ * - PDF generation
+ * - Server-side rendering without hydration
+ */
+const meta = {
+  title: 'AbacusStatic/Server Component Ready',
+  component: AbacusStatic,
+  parameters: {
+    layout: 'centered',
+  },
+  tags: ['autodocs'],
+} satisfies Meta<typeof AbacusStatic>
+
+export default meta
+type Story = StoryObj<typeof meta>
+
+export const Default: Story = {
+  args: {
+    value: 123,
+    columns: 'auto',
+  },
+}
+
+export const DifferentValues: Story = {
+  render: () => (
+    <div style={{ display: 'flex', gap: '30px', flexWrap: 'wrap' }}>
+      {[1, 5, 10, 25, 50, 100, 456, 789].map((value) => (
+        <div key={value} style={{ textAlign: 'center' }}>
+          <AbacusStatic value={value} columns="auto" />
+          <p style={{ marginTop: '10px', color: '#64748b' }}>{value}</p>
+        </div>
+      ))}
+    </div>
+  ),
+}
+
+export const ColorSchemes: Story = {
+  render: () => (
+    <div style={{ display: 'flex', gap: '40px', flexWrap: 'wrap' }}>
+      <div style={{ textAlign: 'center' }}>
+        <AbacusStatic value={456} colorScheme="place-value" />
+        <p style={{ marginTop: '10px', color: '#64748b' }}>Place Value</p>
+      </div>
+      <div style={{ textAlign: 'center' }}>
+        <AbacusStatic value={456} colorScheme="monochrome" />
+        <p style={{ marginTop: '10px', color: '#64748b' }}>Monochrome</p>
+      </div>
+      <div style={{ textAlign: 'center' }}>
+        <AbacusStatic value={456} colorScheme="heaven-earth" />
+        <p style={{ marginTop: '10px', color: '#64748b' }}>Heaven-Earth</p>
+      </div>
+      <div style={{ textAlign: 'center' }}>
+        <AbacusStatic value={456} colorScheme="alternating" />
+        <p style={{ marginTop: '10px', color: '#64748b' }}>Alternating</p>
+      </div>
+    </div>
+  ),
+}
+
+export const BeadShapes: Story = {
+  render: () => (
+    <div style={{ display: 'flex', gap: '40px' }}>
+      <div style={{ textAlign: 'center' }}>
+        <AbacusStatic value={42} beadShape="circle" />
+        <p style={{ marginTop: '10px', color: '#64748b' }}>Circle</p>
+      </div>
+      <div style={{ textAlign: 'center' }}>
+        <AbacusStatic value={42} beadShape="diamond" />
+        <p style={{ marginTop: '10px', color: '#64748b' }}>Diamond</p>
+      </div>
+      <div style={{ textAlign: 'center' }}>
+        <AbacusStatic value={42} beadShape="square" />
+        <p style={{ marginTop: '10px', color: '#64748b' }}>Square</p>
+      </div>
+    </div>
+  ),
+}
+
+export const CompactMode: Story = {
+  render: () => (
+    <div style={{ fontSize: '24px', display: 'flex', alignItems: 'center', gap: '15px' }}>
+      <span>The equation:</span>
+      <AbacusStatic value={5} columns={1} compact hideInactiveBeads scaleFactor={0.7} />
+      <span>+</span>
+      <AbacusStatic value={3} columns={1} compact hideInactiveBeads scaleFactor={0.7} />
+      <span>=</span>
+      <AbacusStatic value={8} columns={1} compact hideInactiveBeads scaleFactor={0.7} />
+    </div>
+  ),
+}
+
+export const HideInactiveBeads: Story = {
+  render: () => (
+    <div style={{ display: 'flex', gap: '40px' }}>
+      <div style={{ textAlign: 'center' }}>
+        <AbacusStatic value={25} hideInactiveBeads={false} />
+        <p style={{ marginTop: '10px', color: '#64748b' }}>Show All</p>
+      </div>
+      <div style={{ textAlign: 'center' }}>
+        <AbacusStatic value={25} hideInactiveBeads />
+        <p style={{ marginTop: '10px', color: '#64748b' }}>Hide Inactive</p>
+      </div>
+    </div>
+  ),
+}
+
+export const WithThemes: Story = {
+  render: () => (
+    <div style={{ display: 'flex', gap: '40px', flexWrap: 'wrap' }}>
+      <div style={{ textAlign: 'center' }}>
+        <AbacusStatic value={123} customStyles={ABACUS_THEMES.light} />
+        <p style={{ marginTop: '10px', color: '#64748b' }}>Light</p>
+      </div>
+      <div style={{ textAlign: 'center', padding: '20px', background: '#1e293b', borderRadius: '8px' }}>
+        <AbacusStatic value={123} customStyles={ABACUS_THEMES.dark} />
+        <p style={{ marginTop: '10px', color: '#cbd5e1' }}>Dark</p>
+      </div>
+      <div style={{ textAlign: 'center' }}>
+        <AbacusStatic value={123} customStyles={ABACUS_THEMES.trophy} />
+        <p style={{ marginTop: '10px', color: '#64748b' }}>Trophy</p>
+      </div>
+    </div>
+  ),
+}
+
+export const ColumnHighlightingAndLabels: Story = {
+  render: () => (
+    <div style={{ display: 'flex', flexDirection: 'column', gap: '40px' }}>
+      <div style={{ textAlign: 'center' }}>
+        <AbacusStatic
+          value={456}
+          highlightColumns={[1]}
+          columnLabels={['ones', 'tens', 'hundreds']}
+        />
+        <p style={{ marginTop: '10px', color: '#64748b' }}>Highlighting tens place</p>
+      </div>
+      <div style={{ textAlign: 'center' }}>
+        <AbacusStatic
+          value={789}
+          highlightColumns={[0, 2]}
+          columnLabels={['ones', 'tens', 'hundreds']}
+        />
+        <p style={{ marginTop: '10px', color: '#64748b' }}>Multiple highlights</p>
+      </div>
+    </div>
+  ),
+}
+
+export const Scaling: Story = {
+  render: () => (
+    <div style={{ display: 'flex', gap: '40px', alignItems: 'flex-end' }}>
+      <div style={{ textAlign: 'center' }}>
+        <AbacusStatic value={9} scaleFactor={0.5} />
+        <p style={{ marginTop: '10px', color: '#64748b' }}>0.5x</p>
+      </div>
+      <div style={{ textAlign: 'center' }}>
+        <AbacusStatic value={9} scaleFactor={1} />
+        <p style={{ marginTop: '10px', color: '#64748b' }}>1x</p>
+      </div>
+      <div style={{ textAlign: 'center' }}>
+        <AbacusStatic value={9} scaleFactor={1.5} />
+        <p style={{ marginTop: '10px', color: '#64748b' }}>1.5x</p>
+      </div>
+    </div>
+  ),
+}
+
+export const ServerComponentExample: Story = {
+  render: () => (
+    <div style={{ maxWidth: '700px', padding: '20px', background: '#f8fafc', borderRadius: '8px' }}>
+      <h3 style={{ marginTop: 0 }}>React Server Component Usage</h3>
+      <pre
+        style={{
+          background: '#1e293b',
+          color: '#e2e8f0',
+          padding: '15px',
+          borderRadius: '6px',
+          overflow: 'auto',
+          fontSize: '13px',
+        }}
+      >
+        {`// app/flashcards/page.tsx (Server Component)
+import { AbacusStatic } from '@soroban/abacus-react'
+
+export default function FlashcardsPage() {
+  const numbers = [1, 5, 10, 25, 50, 100]
+
+  return (
+    <div className="grid grid-cols-3 gap-4">
+      {numbers.map(num => (
+        <div key={num} className="card">
+          <AbacusStatic
+            value={num}
+            columns="auto"
+            hideInactiveBeads
+            compact
+          />
+          <p>{num}</p>
+        </div>
+      ))}
+    </div>
+  )
+}
+
+// ✅ No "use client" needed!
+// ✅ Rendered on server
+// ✅ Zero client JavaScript`}
+      </pre>
+    </div>
+  ),
+}
+
+export const PreviewCards: Story = {
+  render: () => (
+    <div
+      style={{
+        display: 'grid',
+        gridTemplateColumns: 'repeat(auto-fit, minmax(150px, 1fr))',
+        gap: '20px',
+        maxWidth: '900px',
+      }}
+    >
+      {[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 25, 50].map((value) => (
+        <div
+          key={value}
+          style={{
+            padding: '15px',
+            background: 'white',
+            border: '2px solid #e2e8f0',
+            borderRadius: '12px',
+            display: 'flex',
+            flexDirection: 'column',
+            alignItems: 'center',
+            gap: '10px',
+          }}
+        >
+          <AbacusStatic value={value} columns="auto" scaleFactor={0.8} hideInactiveBeads />
+          <span style={{ fontSize: '18px', fontWeight: 'bold', color: '#475569' }}>{value}</span>
+        </div>
+      ))}
+    </div>
+  ),
+}

packages/abacus-react/src/AbacusStatic.tsx

@@ -0,0 +1,184 @@
+/**
+ * AbacusStatic - Server Component compatible static abacus
+ *
+ * Shares layout and rendering with AbacusReact through dependency injection.
+ * Uses standard dimensions to ensure same props = same exact visual output.
+ * Reuses: AbacusSVGRenderer for structure, shared dimension/position calculators
+ * Different: No hooks, no animations, no interactions, simplified bead rendering
+ */
+
+import { numberToAbacusState, calculateStandardDimensions } from './AbacusUtils'
+import { AbacusSVGRenderer } from './AbacusSVGRenderer'
+import { AbacusStaticBead } from './AbacusStaticBead'
+import type {
+  AbacusCustomStyles,
+  BeadConfig,
+  ValidPlaceValues
+} from './AbacusReact'
+
+export interface AbacusStaticConfig {
+  value: number | bigint
+  columns?: number | 'auto'
+  beadShape?: 'circle' | 'diamond' | 'square'
+  colorScheme?: 'monochrome' | 'place-value' | 'alternating' | 'heaven-earth'
+  colorPalette?: 'default' | 'pastel' | 'vibrant' | 'earth-tones'
+  showNumbers?: boolean | 'always' | 'never'
+  hideInactiveBeads?: boolean
+  scaleFactor?: number
+  frameVisible?: boolean
+  compact?: boolean
+  customStyles?: AbacusCustomStyles
+  highlightColumns?: number[]
+  columnLabels?: string[]
+}
+
+// Shared color logic (matches AbacusReact)
+function getBeadColor(
+  bead: BeadConfig,
+  totalColumns: number,
+  colorScheme: string,
+  colorPalette: string
+): string {
+  const placeValue = bead.placeValue
+
+  // Place-value coloring
+  if (colorScheme === 'place-value') {
+    const colors: Record<string, string[]> = {
+      default: [
+        '#ef4444', // red - ones
+        '#f59e0b', // amber - tens
+        '#10b981', // emerald - hundreds
+        '#3b82f6', // blue - thousands
+        '#8b5cf6', // purple - ten thousands
+        '#ec4899', // pink - hundred thousands
+        '#14b8a6', // teal - millions
+        '#f97316', // orange - ten millions
+        '#6366f1', // indigo - hundred millions
+        '#84cc16', // lime - billions
+      ],
+      pastel: [
+        '#fca5a5', '#fcd34d', '#6ee7b7', '#93c5fd', '#c4b5fd',
+        '#f9a8d4', '#5eead4', '#fdba74', '#a5b4fc', '#bef264',
+      ],
+      vibrant: [
+        '#dc2626', '#d97706', '#059669', '#2563eb', '#7c3aed',
+        '#db2777', '#0d9488', '#ea580c', '#4f46e5', '#65a30d',
+      ],
+      'earth-tones': [
+        '#92400e', '#78350f', '#365314', '#1e3a8a', '#4c1d95',
+        '#831843', '#134e4a', '#7c2d12', '#312e81', '#3f6212',
+      ],
+    }
+
+    const palette = colors[colorPalette] || colors.default
+    return palette[placeValue % palette.length]
+  }
+
+  // Heaven-earth coloring
+  if (colorScheme === 'heaven-earth') {
+    return bead.type === 'heaven' ? '#3b82f6' : '#10b981'
+  }
+
+  // Alternating coloring
+  if (colorScheme === 'alternating') {
+    const columnIndex = totalColumns - 1 - placeValue
+    return columnIndex % 2 === 0 ? '#3b82f6' : '#10b981'
+  }
+
+  // Monochrome (default)
+  return '#3b82f6'
+}
+
+/**
+ * AbacusStatic - Pure static abacus component (Server Component compatible)
+ */
+export function AbacusStatic({
+  value,
+  columns = 'auto',
+  beadShape = 'circle',
+  colorScheme = 'place-value',
+  colorPalette = 'default',
+  showNumbers = true,
+  hideInactiveBeads = false,
+  scaleFactor = 1,
+  frameVisible = true,
+  compact = false,
+  customStyles,
+  highlightColumns = [],
+  columnLabels = [],
+}: AbacusStaticConfig) {
+  // Calculate columns
+  const valueStr = value.toString().replace('-', '')
+  const minColumns = Math.max(1, valueStr.length)
+  const effectiveColumns = columns === 'auto' ? minColumns : Math.max(columns, minColumns)
+
+  // Use shared utility to convert value to bead states
+  const state = numberToAbacusState(value, effectiveColumns)
+
+  // Generate bead configs (matching AbacusReact's structure)
+  const beadConfigs: BeadConfig[][] = []
+  for (let colIndex = 0; colIndex < effectiveColumns; colIndex++) {
+    const placeValue = (effectiveColumns - 1 - colIndex) as ValidPlaceValues
+    const columnState = state[placeValue] || { heavenActive: false, earthActive: 0 }
+
+    const beads: BeadConfig[] = []
+
+    // Heaven bead
+    beads.push({
+      type: 'heaven',
+      value: 5,
+      active: columnState.heavenActive,
+      position: 0,
+      placeValue,
+    })
+
+    // Earth beads
+    for (let i = 0; i < 4; i++) {
+      beads.push({
+        type: 'earth',
+        value: 1,
+        active: i < columnState.earthActive,
+        position: i,
+        placeValue,
+      })
+    }
+
+    beadConfigs.push(beads)
+  }
+
+  // Calculate standard dimensions (same as AbacusReact!)
+  const dimensions = calculateStandardDimensions({
+    columns: effectiveColumns,
+    scaleFactor,
+    showNumbers: !!showNumbers,
+    columnLabels,
+  })
+
+  // Compact mode hides frame
+  const effectiveFrameVisible = compact ? false : frameVisible
+
+  // Use shared renderer with static bead component
+  return (
+    <AbacusSVGRenderer
+      value={value}
+      columns={effectiveColumns}
+      state={state}
+      beadConfigs={beadConfigs}
+      dimensions={dimensions}
+      scaleFactor={scaleFactor}
+      beadShape={beadShape}
+      colorScheme={colorScheme}
+      colorPalette={colorPalette}
+      hideInactiveBeads={hideInactiveBeads}
+      frameVisible={effectiveFrameVisible}
+      showNumbers={!!showNumbers}
+      customStyles={customStyles}
+      highlightColumns={highlightColumns}
+      columnLabels={columnLabels}
+      BeadComponent={AbacusStaticBead}
+      getBeadColor={getBeadColor}
+    />
+  )
+}
+
+export default AbacusStatic

packages/abacus-react/src/AbacusStaticBead.tsx

@@ -0,0 +1,101 @@
+/**
+ * StaticBead - Pure SVG bead with no animations or interactions
+ * Used by AbacusStatic for server-side rendering
+ */
+
+import type { BeadConfig, BeadStyle } from './AbacusReact'
+
+export interface StaticBeadProps {
+  bead: BeadConfig
+  x: number
+  y: number
+  size: number
+  shape: 'diamond' | 'square' | 'circle'
+  color: string
+  customStyle?: BeadStyle
+  hideInactiveBeads?: boolean
+}
+
+export function AbacusStaticBead({
+  bead,
+  x,
+  y,
+  size,
+  shape,
+  color,
+  customStyle,
+  hideInactiveBeads = false,
+}: StaticBeadProps) {
+  // Don't render inactive beads if hideInactiveBeads is true
+  if (!bead.active && hideInactiveBeads) {
+    return null
+  }
+
+  const halfSize = size / 2
+  const opacity = bead.active ? (customStyle?.opacity ?? 1) : 0.3
+  const fill = customStyle?.fill || color
+  const stroke = customStyle?.stroke || '#000'
+  const strokeWidth = customStyle?.strokeWidth || 0.5
+
+  // Calculate offset based on shape (matching AbacusReact positioning)
+  const getXOffset = () => {
+    return shape === 'diamond' ? size * 0.7 : halfSize
+  }
+
+  const getYOffset = () => {
+    return halfSize
+  }
+
+  const transform = `translate(${x - getXOffset()}, ${y - getYOffset()})`
+
+  const renderShape = () => {
+    switch (shape) {
+      case 'diamond':
+        return (
+          <polygon
+            points={`${size * 0.7},0 ${size * 1.4},${halfSize} ${size * 0.7},${size} 0,${halfSize}`}
+            fill={fill}
+            stroke={stroke}
+            strokeWidth={strokeWidth}
+            opacity={opacity}
+          />
+        )
+      case 'square':
+        return (
+          <rect
+            width={size}
+            height={size}
+            fill={fill}
+            stroke={stroke}
+            strokeWidth={strokeWidth}
+            rx="1"
+            opacity={opacity}
+          />
+        )
+      case 'circle':
+      default:
+        return (
+          <circle
+            cx={halfSize}
+            cy={halfSize}
+            r={halfSize}
+            fill={fill}
+            stroke={stroke}
+            strokeWidth={strokeWidth}
+            opacity={opacity}
+          />
+        )
+    }
+  }
+
+  return (
+    <g
+      className={`abacus-bead ${bead.active ? 'active' : 'inactive'} ${hideInactiveBeads && !bead.active ? 'hidden-inactive' : ''}`}
+      data-testid={`bead-place-${bead.placeValue}-${bead.type}${bead.type === 'earth' ? `-pos-${bead.position}` : ''}`}
+      transform={transform}
+      style={{ transition: 'opacity 0.2s ease-in-out' }}
+    >
+      {renderShape()}
+    </g>
+  )
+}

packages/abacus-react/src/AbacusThemes.ts

@@ -0,0 +1,115 @@
+/**
+ * Pre-defined theme presets for AbacusReact component
+ * These eliminate the need for manual style object creation
+ */
+
+import type { AbacusCustomStyles } from './AbacusReact'
+
+export const ABACUS_THEMES = {
+  /**
+   * Light theme - solid white frame with subtle gray accents
+   * Best for: Clean, minimalist designs on light backgrounds
+   */
+  light: {
+    columnPosts: {
+      fill: 'rgb(255, 255, 255)',
+      stroke: 'rgb(200, 200, 200)',
+      strokeWidth: 2,
+    },
+    reckoningBar: {
+      fill: 'rgb(255, 255, 255)',
+      stroke: 'rgb(200, 200, 200)',
+      strokeWidth: 3,
+    },
+  } as AbacusCustomStyles,
+
+  /**
+   * Dark theme - translucent white with subtle glow
+   * Best for: Dark backgrounds, hero sections, dramatic presentations
+   */
+  dark: {
+    columnPosts: {
+      fill: 'rgba(255, 255, 255, 0.3)',
+      stroke: 'rgba(255, 255, 255, 0.2)',
+      strokeWidth: 2,
+    },
+    reckoningBar: {
+      fill: 'rgba(255, 255, 255, 0.4)',
+      stroke: 'rgba(255, 255, 255, 0.25)',
+      strokeWidth: 3,
+    },
+  } as AbacusCustomStyles,
+
+  /**
+   * Trophy/Premium theme - golden frame with warm tones
+   * Best for: Achievements, rewards, celebration contexts
+   */
+  trophy: {
+    columnPosts: {
+      fill: '#fbbf24',
+      stroke: '#f59e0b',
+      strokeWidth: 3,
+    },
+    reckoningBar: {
+      fill: '#fbbf24',
+      stroke: '#f59e0b',
+      strokeWidth: 4,
+    },
+  } as AbacusCustomStyles,
+
+  /**
+   * Translucent theme - subtle, nearly invisible frame
+   * Best for: Inline displays, minimal UI, focus on beads
+   */
+  translucent: {
+    columnPosts: {
+      fill: 'rgba(0, 0, 0, 0.05)',
+      stroke: 'rgba(0, 0, 0, 0.1)',
+      strokeWidth: 1,
+    },
+    reckoningBar: {
+      fill: 'rgba(0, 0, 0, 0.1)',
+      stroke: 'none',
+      strokeWidth: 0,
+    },
+  } as AbacusCustomStyles,
+
+  /**
+   * Solid/High-contrast theme - black frame for maximum visibility
+   * Best for: Educational contexts, high visibility requirements
+   */
+  solid: {
+    columnPosts: {
+      fill: 'rgb(0, 0, 0)',
+      stroke: 'rgb(0, 0, 0)',
+      strokeWidth: 2,
+    },
+    reckoningBar: {
+      fill: 'rgb(0, 0, 0)',
+      stroke: 'none',
+      strokeWidth: 0,
+    },
+  } as AbacusCustomStyles,
+
+  /**
+   * Traditional/Natural theme - brown wooden appearance
+   * Best for: Traditional soroban aesthetic, cultural contexts
+   */
+  traditional: {
+    columnPosts: {
+      fill: '#8B5A2B',
+      stroke: '#654321',
+      strokeWidth: 2,
+    },
+    reckoningBar: {
+      fill: '#8B5A2B',
+      stroke: '#654321',
+      strokeWidth: 3,
+    },
+  } as AbacusCustomStyles,
+} as const
+
+/**
+ * Theme names type for TypeScript autocomplete
+ */
+export type AbacusThemeName = keyof typeof ABACUS_THEMES

packages/abacus-react/src/AbacusUtils.ts

@@ -0,0 +1,562 @@
+/**
+ * Utility functions for working with abacus states and calculations
+ * These help convert between numbers and bead positions, calculate diffs, etc.
+ */
+
+import type { ValidPlaceValues, BeadHighlight } from './AbacusReact'
+
+/**
+ * Represents the state of beads in a single column
+ */
+export interface BeadState {
+  heavenActive: boolean
+  earthActive: number // 0-4
+}
+
+/**
+ * Represents the complete state of an abacus
+ * Key is the place value (0 = ones, 1 = tens, etc.)
+ */
+export interface AbacusState {
+  [placeValue: number]: BeadState
+}
+
+/**
+ * Convert a number to abacus state representation
+ * @param value - The number to convert
+ * @param maxPlaces - Maximum number of place values to include
+ * @returns AbacusState object representing the bead positions
+ */
+export function numberToAbacusState(value: number | bigint, maxPlaces: number = 5): AbacusState {
+  const state: AbacusState = {}
+  const valueNum = typeof value === 'bigint' ? Number(value) : value
+
+  for (let place = 0; place < maxPlaces; place++) {
+    const placeValueNum = 10 ** place
+    const digit = Math.floor(valueNum / placeValueNum) % 10
+
+    state[place] = {
+      heavenActive: digit >= 5,
+      earthActive: digit >= 5 ? digit - 5 : digit,
+    }
+  }
+
+  return state
+}
+
+/**
+ * Convert abacus state to a number
+ * @param state - The abacus state to convert
+ * @returns The numeric value represented by the abacus
+ */
+export function abacusStateToNumber(state: AbacusState): number {
+  let total = 0
+
+  for (const placeStr in state) {
+    const place = parseInt(placeStr, 10)
+    const beadState = state[place]
+    const digit = (beadState.heavenActive ? 5 : 0) + beadState.earthActive
+    total += digit * (10 ** place)
+  }
+
+  return total
+}
+
+/**
+ * Bead highlight with place value (internal type for calculations)
+ */
+export interface PlaceValueBasedBead {
+  placeValue: ValidPlaceValues
+  beadType: 'heaven' | 'earth'
+  position?: 0 | 1 | 2 | 3
+}
+
+/**
+ * Calculate which beads need to change between two abacus states
+ * @param startState - The starting abacus state
+ * @param targetState - The target abacus state
+ * @returns Object with arrays of bead additions and removals
+ */
+export function calculateBeadChanges(
+  startState: AbacusState,
+  targetState: AbacusState
+): {
+  additions: PlaceValueBasedBead[]
+  removals: PlaceValueBasedBead[]
+  placeValue: number
+} {
+  const additions: PlaceValueBasedBead[] = []
+  const removals: PlaceValueBasedBead[] = []
+  let mainPlaceValue = 0
+
+  for (const placeStr in targetState) {
+    const place = parseInt(placeStr, 10) as ValidPlaceValues
+    const start = startState[place] || { heavenActive: false, earthActive: 0 }
+    const target = targetState[place]
+
+    // Check heaven bead changes
+    if (!start.heavenActive && target.heavenActive) {
+      additions.push({ placeValue: place, beadType: 'heaven' })
+      mainPlaceValue = place
+    } else if (start.heavenActive && !target.heavenActive) {
+      removals.push({ placeValue: place, beadType: 'heaven' })
+      mainPlaceValue = place
+    }
+
+    // Check earth bead changes
+    if (target.earthActive > start.earthActive) {
+      // Adding earth beads
+      for (let pos = start.earthActive; pos < target.earthActive; pos++) {
+        additions.push({ placeValue: place, beadType: 'earth', position: pos as 0 | 1 | 2 | 3 })
+        mainPlaceValue = place
+      }
+    } else if (target.earthActive < start.earthActive) {
+      // Removing earth beads
+      for (let pos = start.earthActive - 1; pos >= target.earthActive; pos--) {
+        removals.push({ placeValue: place, beadType: 'earth', position: pos as 0 | 1 | 2 | 3 })
+        mainPlaceValue = place
+      }
+    }
+  }
+
+  return { additions, removals, placeValue: mainPlaceValue }
+}
+
+/**
+ * Result of a bead diff calculation
+ */
+export interface BeadDiffResult {
+  placeValue: ValidPlaceValues
+  beadType: 'heaven' | 'earth'
+  position?: number
+  direction: 'activate' | 'deactivate'
+  order: number // Order of operations for animations
+}
+
+/**
+ * Output of calculateBeadDiff function
+ */
+export interface BeadDiffOutput {
+  changes: BeadDiffResult[]
+  highlights: PlaceValueBasedBead[]
+  hasChanges: boolean
+  summary: string
+}
+
+/**
+ * Calculate the diff between two abacus states
+ * Returns exactly which beads need to move with directions and order
+ * @param fromState - Starting state
+ * @param toState - Target state
+ * @returns BeadDiffOutput with changes, highlights, and summary
+ */
+export function calculateBeadDiff(fromState: AbacusState, toState: AbacusState): BeadDiffOutput {
+  const { additions, removals } = calculateBeadChanges(fromState, toState)
+
+  const changes: BeadDiffResult[] = []
+  const highlights: PlaceValueBasedBead[] = []
+  let order = 0
+
+  // Process removals first (pedagogical order: clear before adding)
+  removals.forEach((removal) => {
+    changes.push({
+      placeValue: removal.placeValue,
+      beadType: removal.beadType,
+      position: removal.position,
+      direction: 'deactivate',
+      order: order++,
+    })
+
+    highlights.push({
+      placeValue: removal.placeValue,
+      beadType: removal.beadType,
+      position: removal.position,
+    })
+  })
+
+  // Process additions second (pedagogical order: add after clearing)
+  additions.forEach((addition) => {
+    changes.push({
+      placeValue: addition.placeValue,
+      beadType: addition.beadType,
+      position: addition.position,
+      direction: 'activate',
+      order: order++,
+    })
+
+    highlights.push({
+      placeValue: addition.placeValue,
+      beadType: addition.beadType,
+      position: addition.position,
+    })
+  })
+
+  // Generate summary
+  const summary = generateDiffSummary(changes)
+
+  return {
+    changes,
+    highlights,
+    hasChanges: changes.length > 0,
+    summary,
+  }
+}
+
+/**
+ * Calculate bead diff from numeric values
+ * Convenience function for when you have numbers instead of states
+ * @param fromValue - Starting numeric value
+ * @param toValue - Target numeric value
+ * @param maxPlaces - Maximum number of place values to consider
+ * @returns BeadDiffOutput
+ */
+export function calculateBeadDiffFromValues(
+  fromValue: number | bigint,
+  toValue: number | bigint,
+  maxPlaces: number = 5
+): BeadDiffOutput {
+  const fromState = numberToAbacusState(fromValue, maxPlaces)
+  const toState = numberToAbacusState(toValue, maxPlaces)
+  return calculateBeadDiff(fromState, toState)
+}
+
+/**
+ * Validate that an abacus value is within the supported range
+ * @param value - The value to validate
+ * @param maxPlaces - Maximum number of place values supported
+ * @returns Object with isValid boolean and optional error message
+ */
+export function validateAbacusValue(
+  value: number | bigint,
+  maxPlaces: number = 5
+): { isValid: boolean; error?: string } {
+  const valueNum = typeof value === 'bigint' ? Number(value) : value
+
+  if (valueNum < 0) {
+    return { isValid: false, error: 'Negative values are not supported' }
+  }
+
+  const maxValue = 10 ** maxPlaces - 1
+  if (valueNum > maxValue) {
+    return { isValid: false, error: `Value exceeds maximum for ${maxPlaces} columns (max: ${maxValue})` }
+  }
+
+  return { isValid: true }
+}
+
+/**
+ * Check if two abacus states are equal
+ * @param state1 - First state
+ * @param state2 - Second state
+ * @returns true if states are equal
+ */
+export function areStatesEqual(state1: AbacusState, state2: AbacusState): boolean {
+  const places1 = Object.keys(state1)
+    .map((k) => parseInt(k, 10))
+    .sort()
+  const places2 = Object.keys(state2)
+    .map((k) => parseInt(k, 10))
+    .sort()
+
+  if (places1.length !== places2.length) return false
+
+  for (const place of places1) {
+    const bead1 = state1[place]
+    const bead2 = state2[place]
+
+    if (!bead2) return false
+    if (bead1.heavenActive !== bead2.heavenActive) return false
+    if (bead1.earthActive !== bead2.earthActive) return false
+  }
+
+  return true
+}
+
+// Internal helper functions
+
+function generateDiffSummary(changes: BeadDiffResult[]): string {
+  if (changes.length === 0) {
+    return 'No changes needed'
+  }
+
+  // Sort by order to respect pedagogical sequence
+  const sortedChanges = [...changes].sort((a, b) => a.order - b.order)
+
+  const deactivations = sortedChanges.filter((c) => c.direction === 'deactivate')
+  const activations = sortedChanges.filter((c) => c.direction === 'activate')
+
+  const parts: string[] = []
+
+  // Process deactivations first (pedagogical order)
+  if (deactivations.length > 0) {
+    const deactivationsByPlace = groupByPlace(deactivations)
+    Object.entries(deactivationsByPlace).forEach(([place, beads]) => {
+      const placeName = getPlaceName(parseInt(place, 10))
+      const heavenBeads = beads.filter((b) => b.beadType === 'heaven')
+      const earthBeads = beads.filter((b) => b.beadType === 'earth')
+
+      if (heavenBeads.length > 0) {
+        parts.push(`remove heaven bead in ${placeName}`)
+      }
+      if (earthBeads.length > 0) {
+        const count = earthBeads.length
+        parts.push(`remove ${count} earth bead${count > 1 ? 's' : ''} in ${placeName}`)
+      }
+    })
+  }
+
+  // Process activations second (pedagogical order)
+  if (activations.length > 0) {
+    const activationsByPlace = groupByPlace(activations)
+    Object.entries(activationsByPlace).forEach(([place, beads]) => {
+      const placeName = getPlaceName(parseInt(place, 10))
+      const heavenBeads = beads.filter((b) => b.beadType === 'heaven')
+      const earthBeads = beads.filter((b) => b.beadType === 'earth')
+
+      if (heavenBeads.length > 0) {
+        parts.push(`add heaven bead in ${placeName}`)
+      }
+      if (earthBeads.length > 0) {
+        const count = earthBeads.length
+        parts.push(`add ${count} earth bead${count > 1 ? 's' : ''} in ${placeName}`)
+      }
+    })
+  }
+
+  return parts.join(', then ')
+}
+
+function groupByPlace(changes: BeadDiffResult[]): {
+  [place: string]: BeadDiffResult[]
+} {
+  return changes.reduce(
+    (groups, change) => {
+      const place = change.placeValue.toString()
+      if (!groups[place]) {
+        groups[place] = []
+      }
+      groups[place].push(change)
+      return groups
+    },
+    {} as { [place: string]: BeadDiffResult[] }
+  )
+}
+
+function getPlaceName(place: number): string {
+  switch (place) {
+    case 0:
+      return 'ones column'
+    case 1:
+      return 'tens column'
+    case 2:
+      return 'hundreds column'
+    case 3:
+      return 'thousands column'
+    default:
+      return `place ${place} column`
+  }
+}
+
+/**
+ * Complete layout dimensions for abacus rendering
+ * Used by both static and dynamic rendering to ensure identical layouts
+ */
+export interface AbacusLayoutDimensions {
+  // SVG canvas size
+  width: number
+  height: number
+
+  // Bead and spacing
+  beadSize: number
+  rodSpacing: number  // Same as columnSpacing
+  rodWidth: number
+  barThickness: number
+
+  // Gaps and positioning
+  heavenEarthGap: number  // Gap between heaven and earth sections (where bar sits)
+  activeGap: number       // Gap between active beads and reckoning bar
+  inactiveGap: number     // Gap between inactive beads and active beads/bar
+  adjacentSpacing: number // Minimal spacing for adjacent beads of same type
+
+  // Key Y positions (absolute coordinates)
+  barY: number           // Y position of reckoning bar
+  heavenY: number        // Y position where inactive heaven beads rest
+  earthY: number         // Y position where inactive earth beads rest
+
+  // Padding and extras
+  padding: number
+  labelHeight: number
+  numbersHeight: number
+
+  // Derived values
+  totalColumns: number
+}
+
+/**
+ * Calculate standard layout dimensions for abacus rendering
+ * This ensures both static and dynamic rendering use identical geometry
+ * Same props = same exact visual output
+ *
+ * @param columns - Number of columns in the abacus
+ * @param scaleFactor - Size multiplier (default: 1)
+ * @param showNumbers - Whether numbers are shown below columns
+ * @param columnLabels - Array of column labels (if any)
+ * @returns Complete layout dimensions object
+ */
+export function calculateStandardDimensions({
+  columns,
+  scaleFactor = 1,
+  showNumbers = false,
+  columnLabels = [],
+}: {
+  columns: number
+  scaleFactor?: number
+  showNumbers?: boolean
+  columnLabels?: string[]
+}): AbacusLayoutDimensions {
+  // Standard dimensions - used by both AbacusStatic and AbacusReact
+  const rodWidth = 3 * scaleFactor
+  const beadSize = 12 * scaleFactor
+  const adjacentSpacing = 0.5 * scaleFactor
+  const columnSpacing = 25 * scaleFactor
+  const heavenEarthGap = 30 * scaleFactor
+  const barThickness = 2 * scaleFactor
+
+  // Positioning gaps
+  const activeGap = 1 * scaleFactor
+  const inactiveGap = 8 * scaleFactor
+
+  // Calculate total dimensions
+  const totalWidth = columns * columnSpacing
+  const baseHeight = heavenEarthGap + 5 * (beadSize + 4 * scaleFactor) + 10 * scaleFactor
+
+  // Extra spacing
+  const numbersSpace = showNumbers ? 40 * scaleFactor : 0
+  const labelSpace = columnLabels.length > 0 ? 30 * scaleFactor : 0
+  const padding = 0 // No padding - keeps layout clean
+
+  const totalHeight = baseHeight + numbersSpace + labelSpace
+
+  // Key Y positions - bar is at heavenEarthGap from top
+  const barY = heavenEarthGap + labelSpace
+  const heavenY = labelSpace + activeGap  // Top area for inactive heaven beads
+  const earthY = barY + barThickness + (4 * beadSize) + activeGap + inactiveGap  // Bottom area for inactive earth
+
+  return {
+    width: totalWidth,
+    height: totalHeight,
+    beadSize,
+    rodSpacing: columnSpacing,
+    rodWidth,
+    barThickness,
+    heavenEarthGap,
+    activeGap,
+    inactiveGap,
+    adjacentSpacing,
+    barY,
+    heavenY,
+    earthY,
+    padding,
+    labelHeight: labelSpace,
+    numbersHeight: numbersSpace,
+    totalColumns: columns,
+  }
+}
+
+/**
+ * @deprecated Use calculateStandardDimensions instead for full layout info
+ * This function only returns width/height for backward compatibility
+ */
+export function calculateAbacusDimensions({
+  columns,
+  showNumbers = true,
+  columnLabels = [],
+}: {
+  columns: number
+  showNumbers?: boolean
+  columnLabels?: string[]
+}): { width: number; height: number } {
+  // Redirect to new function for backward compatibility
+  const dims = calculateStandardDimensions({ columns, scaleFactor: 1, showNumbers, columnLabels })
+  return { width: dims.width, height: dims.height }
+}
+
+/**
+ * Simplified bead config for position calculation
+ * (Compatible with BeadConfig from AbacusReact)
+ */
+export interface BeadPositionConfig {
+  type: 'heaven' | 'earth'
+  active: boolean
+  position: number  // 0 for heaven, 0-3 for earth
+  placeValue: number
+}
+
+/**
+ * Column state needed for earth bead positioning
+ * (Required to calculate inactive earth bead positions correctly)
+ */
+export interface ColumnStateForPositioning {
+  earthActive: number  // Number of active earth beads (0-4)
+}
+
+/**
+ * Calculate the x,y position for a bead based on standard layout dimensions
+ * This ensures both static and dynamic rendering position beads identically
+ * Uses exact Typst formulas from the original implementation
+ *
+ * @param bead - Bead configuration
+ * @param dimensions - Layout dimensions from calculateStandardDimensions
+ * @param columnState - Optional column state (required for inactive earth beads)
+ * @returns Object with x and y coordinates
+ */
+export function calculateBeadPosition(
+  bead: BeadPositionConfig,
+  dimensions: AbacusLayoutDimensions,
+  columnState?: ColumnStateForPositioning
+): { x: number; y: number } {
+  const { beadSize, rodSpacing, heavenEarthGap, barThickness, activeGap, inactiveGap, adjacentSpacing, totalColumns } = dimensions
+
+  // X position based on place value (rightmost = ones place)
+  const columnIndex = totalColumns - 1 - bead.placeValue
+  const x = columnIndex * rodSpacing + rodSpacing / 2
+
+  // Y position based on bead type and active state
+  // These formulas match the original Typst implementation exactly
+  if (bead.type === 'heaven') {
+    if (bead.active) {
+      // Active heaven bead: positioned close to reckoning bar (Typst line 175)
+      const y = heavenEarthGap - beadSize / 2 - activeGap
+      return { x, y }
+    } else {
+      // Inactive heaven bead: positioned away from reckoning bar (Typst line 178)
+      const y = heavenEarthGap - inactiveGap - beadSize / 2
+      return { x, y }
+    }
+  } else {
+    // Earth bead positioning (Typst lines 249-261)
+    const earthActive = columnState?.earthActive ?? 0
+
+    if (bead.active) {
+      // Active beads: positioned near reckoning bar, adjacent beads touch (Typst line 251)
+      const y = heavenEarthGap + barThickness + activeGap + beadSize / 2 +
+                bead.position * (beadSize + adjacentSpacing)
+      return { x, y }
+    } else {
+      // Inactive beads: positioned after active beads + gap (Typst lines 254-261)
+      let y: number
+      if (earthActive > 0) {
+        // Position after the last active bead + gap, then adjacent inactive beads touch (Typst line 256)
+        y = heavenEarthGap + barThickness + activeGap + beadSize / 2 +
+            (earthActive - 1) * (beadSize + adjacentSpacing) +
+            beadSize / 2 + inactiveGap + beadSize / 2 +
+            (bead.position - earthActive) * (beadSize + adjacentSpacing)
+      } else {
+        // No active beads: position after reckoning bar + gap, adjacent inactive beads touch (Typst line 259)
+        y = heavenEarthGap + barThickness + inactiveGap + beadSize / 2 +
+            bead.position * (beadSize + adjacentSpacing)
+      }
+      return { x, y }
+    }
+  }
+}

packages/abacus-react/src/index.ts

@@ -1,5 +1,20 @@
 export { default as AbacusReact } from "./AbacusReact";
-export type { AbacusConfig, BeadConfig, AbacusDimensions } from "./AbacusReact";
+export type {
+  AbacusConfig,
+  BeadConfig,
+  AbacusDimensions,
+  AbacusCustomStyles,
+  BeadStyle,
+  ColumnPostStyle,
+  ReckoningBarStyle,
+  NumeralStyle,
+  ValidPlaceValues,
+  BeadHighlight,
+  StepBeadHighlight,
+  BeadClickEvent,
+  AbacusCallbacks,
+  AbacusOverlay,
+} from "./AbacusReact";
 
 export {
   useAbacusConfig,
@@ -17,3 +32,33 @@ export type {
 
 export { StandaloneBead } from "./StandaloneBead";
 export type { StandaloneBeadProps } from "./StandaloneBead";
+
+export { AbacusStatic } from "./AbacusStatic";
+export type { AbacusStaticConfig } from "./AbacusStatic";
+
+export { ABACUS_THEMES } from "./AbacusThemes";
+export type { AbacusThemeName } from "./AbacusThemes";
+
+export {
+  numberToAbacusState,
+  abacusStateToNumber,
+  calculateBeadChanges,
+  calculateBeadDiff,
+  calculateBeadDiffFromValues,
+  validateAbacusValue,
+  areStatesEqual,
+  calculateAbacusDimensions,
+  calculateStandardDimensions,  // NEW: Shared layout calculator
+  calculateBeadPosition,         // NEW: Bead position calculator
+} from "./AbacusUtils";
+export type {
+  BeadState,
+  AbacusState,
+  BeadDiffResult,
+  BeadDiffOutput,
+  PlaceValueBasedBead,
+  AbacusLayoutDimensions,        // NEW: Complete layout dimensions type
+  BeadPositionConfig,            // NEW: Bead config for position calculation
+} from "./AbacusUtils";
+
+export { useAbacusDiff, useAbacusState } from "./AbacusHooks";

packages/abacus-react/src/static.ts

@@ -0,0 +1,18 @@
+/**
+ * Server Component compatible exports
+ * This entry point only exports components that work without "use client"
+ */
+
+export { AbacusStatic } from './AbacusStatic'
+export type { AbacusStaticConfig } from './AbacusStatic'
+export { AbacusStaticBead } from './AbacusStaticBead'
+export type { StaticBeadProps } from './AbacusStaticBead'
+
+// Re-export shared utilities that are safe for server components
+export { numberToAbacusState, calculateAbacusDimensions } from './AbacusUtils'
+export type {
+  AbacusCustomStyles,
+  BeadConfig,
+  PlaceState,
+  ValidPlaceValues,
+} from './AbacusReact'

packages/abacus-react/vite.config.ts

@@ -8,10 +8,12 @@ export default defineConfig(async () => {
     plugins: [react()],
     build: {
       lib: {
-        entry: resolve(__dirname, "src/index.ts"),
-        name: "AbacusReact",
+        entry: {
+          index: resolve(__dirname, "src/index.ts"),
+          static: resolve(__dirname, "src/static.ts"),
+        },
         formats: ["es", "cjs"],
-        fileName: (format) => `index.${format}.js`,
+        fileName: (format, entryName) => `${entryName}.${format === "es" ? "es" : "cjs"}.js`,
       },
       sourcemap: true,
       rollupOptions: {