chore(release): 4.54.0 [skip ci]

## [4.54.0](https://github.com/antialias/soroban-abacus-flashcards/compare/v4.53.0...v4.54.0) (2025-10-20)

### Features

* **homepage:** add interactive levels slider to replace static progression ([8a2d5ae](8a2d5ae319))

### Code Refactoring

* **levels:** extract levels slider into shared component ([015e30b](015e30b085))

CHANGELOG.md

@@ -1,3 +1,89 @@
+## [4.54.0](https://github.com/antialias/soroban-abacus-flashcards/compare/v4.53.0...v4.54.0) (2025-10-20)
+
+
+### Features
+
+* **homepage:** add interactive levels slider to replace static progression ([8a2d5ae](https://github.com/antialias/soroban-abacus-flashcards/commit/8a2d5ae319af8fd66010dd5538e4b82f7fb35d40))
+
+
+### Code Refactoring
+
+* **levels:** extract levels slider into shared component ([015e30b](https://github.com/antialias/soroban-abacus-flashcards/commit/015e30b085ad2ef798ffd6f7f6716269e3256651))
+
+## [4.53.0](https://github.com/antialias/soroban-abacus-flashcards/compare/v4.52.2...v4.53.0) (2025-10-20)
+
+
+### Features
+
+* **homepage:** add interactive draggable flashcards with physics ([0744883](https://github.com/antialias/soroban-abacus-flashcards/commit/074488349a3ec480548223c313006aa1e9e64e5c))
+
+
+### Code Refactoring
+
+* **homepage:** merge flashcard display with create button section ([3cf4f92](https://github.com/antialias/soroban-abacus-flashcards/commit/3cf4f92643306f055188ede508557515ef5efe98))
+
+## [4.52.2](https://github.com/antialias/soroban-abacus-flashcards/compare/v4.52.1...v4.52.2) (2025-10-20)
+
+
+### Bug Fixes
+
+* **homepage:** use actual container dimensions for flashcard positioning ([4082a24](https://github.com/antialias/soroban-abacus-flashcards/commit/4082a246a33ea67617b762d5b7490a8c9af0ad49))
+
+## [4.52.1](https://github.com/antialias/soroban-abacus-flashcards/compare/v4.52.0...v4.52.1) (2025-10-20)
+
+
+### Bug Fixes
+
+* **homepage:** correct flashcard transform rendering ([5dc636a](https://github.com/antialias/soroban-abacus-flashcards/commit/5dc636a71c15db28c029fd4f60e4a6c95620f953))
+
+## [4.52.0](https://github.com/antialias/soroban-abacus-flashcards/compare/v4.51.0...v4.52.0) (2025-10-20)
+
+
+### Features
+
+* **homepage:** add interactive draggable flashcards with physics ([e711c52](https://github.com/antialias/soroban-abacus-flashcards/commit/e711c527574412de2f9d451c7985c4f8667d269a))
+
+## [4.51.0](https://github.com/antialias/soroban-abacus-flashcards/compare/v4.50.1...v4.51.0) (2025-10-20)
+
+
+### Features
+
+* **homepage:** create fancy flashcard display with spread-out cards ([cd30944](https://github.com/antialias/soroban-abacus-flashcards/commit/cd30944c5e067f84d00dfdf41c37580acc589548))
+
+## [4.50.1](https://github.com/antialias/soroban-abacus-flashcards/compare/v4.50.0...v4.50.1) (2025-10-20)
+
+
+### Bug Fixes
+
+* **homepage:** set fixed width for learning panel to prevent layout shift ([dc19622](https://github.com/antialias/soroban-abacus-flashcards/commit/dc19622bbba2fead8cd9c0b2bda3a38abba0bd41))
+* **homepage:** set fixed width for tutorial panel to prevent layout shift ([aba9f8a](https://github.com/antialias/soroban-abacus-flashcards/commit/aba9f8a94d50590cf94b6cd87f85b497e89045e7))
+
+## [4.50.0](https://github.com/antialias/soroban-abacus-flashcards/compare/v4.49.1...v4.50.0) (2025-10-20)
+
+
+### Features
+
+* **homepage:** add interactive learning panels with animated mini-tutorials ([76d6f19](https://github.com/antialias/soroban-abacus-flashcards/commit/76d6f19d51fe4b9594998ae4e0a8823aff389854))
+
+## [4.49.1](https://github.com/antialias/soroban-abacus-flashcards/compare/v4.49.0...v4.49.1) (2025-10-20)
+
+
+### Code Refactoring
+
+* **homepage:** streamline homepage sections ([d362a77](https://github.com/antialias/soroban-abacus-flashcards/commit/d362a770d63405efee5ef8a896d34e783dd11de2))
+
+## [4.49.0](https://github.com/antialias/soroban-abacus-flashcards/compare/v4.48.5...v4.49.0) (2025-10-20)
+
+
+### Features
+
+* add vibrant gradients and equal heights to game cards ([a1a135a](https://github.com/antialias/soroban-abacus-flashcards/commit/a1a135a8586e314c9d695bec6c4e58ec24e5c9cb)), closes [#4](https://github.com/antialias/soroban-abacus-flashcards/issues/4) [#00f2](https://github.com/antialias/soroban-abacus-flashcards/issues/00f2) [#667](https://github.com/antialias/soroban-abacus-flashcards/issues/667) [#764ba2](https://github.com/antialias/soroban-abacus-flashcards/issues/764ba2) [#f093](https://github.com/antialias/soroban-abacus-flashcards/issues/f093) [#f5576](https://github.com/antialias/soroban-abacus-flashcards/issues/f5576) [#43e97](https://github.com/antialias/soroban-abacus-flashcards/issues/43e97) [#38f9d7](https://github.com/antialias/soroban-abacus-flashcards/issues/38f9d7)
+
+
+### Code Refactoring
+
+* make homepage game cards dynamic from game registry ([7f51652](https://github.com/antialias/soroban-abacus-flashcards/commit/7f516526fb5f5b60c1782db5c8c3e29f05caafa7))
+
 ## [4.48.5](https://github.com/antialias/soroban-abacus-flashcards/compare/v4.48.4...v4.48.5) (2025-10-20)
 
 

apps/web/.claude/settings.local.json

@@ -103,7 +103,8 @@
       "Bash(node -e:*)",
       "Bash(do gh run list --limit 1 --workflow=\"Build and Deploy\" --json conclusion,status,databaseId --jq '.[0] | \"\"\\(.status) - \\(.conclusion // \"\"running\"\") - Run \\(.databaseId)\"\"')",
       "Bash(do ssh nas.home.network '/usr/local/bin/docker inspect soroban-abacus-flashcards --format=\"\"{{index .Config.Labels \\\"\"org.opencontainers.image.revision\\\"\"}}\"\"')",
-      "Bash(git rev-parse HEAD)"
+      "Bash(git rev-parse HEAD)",
+      "Bash(gh run watch --exit-status 18662351595)"
     ],
     "deny": [],
     "ask": []

apps/web/package.json

@@ -53,6 +53,7 @@
     "@tanstack/react-form": "^0.19.0",
     "@tanstack/react-query": "^5.90.2",
     "@types/jsdom": "^21.1.7",
+    "@use-gesture/react": "^10.3.1",
     "bcryptjs": "^2.4.3",
     "better-sqlite3": "^12.4.1",
     "drizzle-orm": "^0.44.6",

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

@@ -1,388 +1,11 @@
 'use client'
 
-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 { PageWithNav } from '@/components/PageWithNav'
+import { LevelSliderDisplay } from '@/components/LevelSliderDisplay'
 import { css } from '../../../styled-system/css'
 import { container, stack } from '../../../styled-system/patterns'
-import { kyuLevelDetails } from '@/data/kyuLevelDetails'
-
-// Combine all levels into one array for the slider
-const allLevels = [
-  {
-    level: '10th Kyu',
-    emoji: '🧒',
-    color: 'green',
-    digits: 2,
-    type: 'kyu' as const,
-  },
-  {
-    level: '9th Kyu',
-    emoji: '🧒',
-    color: 'green',
-    digits: 2,
-    type: 'kyu' as const,
-  },
-  {
-    level: '8th Kyu',
-    emoji: '🧒',
-    color: 'green',
-    digits: 3,
-    type: 'kyu' as const,
-  },
-  {
-    level: '7th Kyu',
-    emoji: '🧒',
-    color: 'green',
-    digits: 4,
-    type: 'kyu' as const,
-  },
-  {
-    level: '6th Kyu',
-    emoji: '🧑',
-    color: 'blue',
-    digits: 5,
-    type: 'kyu' as const,
-  },
-  {
-    level: '5th Kyu',
-    emoji: '🧑',
-    color: 'blue',
-    digits: 6,
-    type: 'kyu' as const,
-  },
-  {
-    level: '4th Kyu',
-    emoji: '🧑',
-    color: 'blue',
-    digits: 7,
-    type: 'kyu' as const,
-  },
-  {
-    level: '3rd Kyu',
-    emoji: '🧔',
-    color: 'violet',
-    digits: 8,
-    type: 'kyu' as const,
-  },
-  {
-    level: '2nd Kyu',
-    emoji: '🧔',
-    color: 'violet',
-    digits: 9,
-    type: 'kyu' as const,
-  },
-  {
-    level: '1st Kyu',
-    emoji: '🧔',
-    color: 'violet',
-    digits: 10,
-    type: 'kyu' as const,
-  },
-  {
-    level: 'Pre-1st Dan',
-    name: 'Jun-Shodan',
-    minScore: 90,
-    emoji: '🧙',
-    color: 'amber',
-    digits: 30,
-    type: 'dan' as const,
-  },
-  {
-    level: '1st Dan',
-    name: 'Shodan',
-    minScore: 100,
-    emoji: '🧙',
-    color: 'amber',
-    digits: 30,
-    type: 'dan' as const,
-  },
-  {
-    level: '2nd Dan',
-    name: 'Nidan',
-    minScore: 120,
-    emoji: '🧙‍♂️',
-    color: 'amber',
-    digits: 30,
-    type: 'dan' as const,
-  },
-  {
-    level: '3rd Dan',
-    name: 'Sandan',
-    minScore: 140,
-    emoji: '🧙‍♂️',
-    color: 'amber',
-    digits: 30,
-    type: 'dan' as const,
-  },
-  {
-    level: '4th Dan',
-    name: 'Yondan',
-    minScore: 160,
-    emoji: '🧙‍♀️',
-    color: 'amber',
-    digits: 30,
-    type: 'dan' as const,
-  },
-  {
-    level: '5th Dan',
-    name: 'Godan',
-    minScore: 180,
-    emoji: '🧙‍♀️',
-    color: 'amber',
-    digits: 30,
-    type: 'dan' as const,
-  },
-  {
-    level: '6th Dan',
-    name: 'Rokudan',
-    minScore: 200,
-    emoji: '🧝',
-    color: 'amber',
-    digits: 30,
-    type: 'dan' as const,
-  },
-  {
-    level: '7th Dan',
-    name: 'Nanadan',
-    minScore: 220,
-    emoji: '🧝',
-    color: 'amber',
-    digits: 30,
-    type: 'dan' as const,
-  },
-  {
-    level: '8th Dan',
-    name: 'Hachidan',
-    minScore: 250,
-    emoji: '🧝‍♂️',
-    color: 'amber',
-    digits: 30,
-    type: 'dan' as const,
-  },
-  {
-    level: '9th Dan',
-    name: 'Kudan',
-    minScore: 270,
-    emoji: '🧝‍♀️',
-    color: 'amber',
-    digits: 30,
-    type: 'dan' as const,
-  },
-  {
-    level: '10th Dan',
-    name: 'Judan',
-    minScore: 290,
-    emoji: '👑',
-    color: 'amber',
-    digits: 30,
-    type: 'dan' as const,
-  },
-] as const
-
-// Helper function to map level names to kyuLevelDetails keys
-function getLevelDetailsKey(levelName: string): string | null {
-  // Convert "10th Kyu" → "10-kyu", "3rd Kyu" → "3-kyu", etc.
-  const match = levelName.match(/^(\d+)(?:st|nd|rd|th)\s+Kyu$/)
-  if (match) {
-    return `${match[1]}-kyu`
-  }
-  return null
-}
-
-// Parse and format kyu level details into structured sections with icons
-function parseKyuDetails(rawText: string) {
-  const lines = rawText.split('\n').filter((line) => line.trim() && !line.includes('shuzan.jp'))
-
-  // Always return sections in consistent order: Add/Sub, Multiply, Divide
-  const sections: Array<{
-    type: 'addSub' | 'multiply' | 'divide'
-    icon: string
-    label: string
-    digits: string | null
-    rows: string | null
-    chars: string | null
-    problems: string | null
-  }> = [
-    {
-      type: 'addSub',
-      icon: '➕➖',
-      label: 'Add/Sub',
-      digits: null,
-      rows: null,
-      chars: null,
-      problems: null,
-    },
-    {
-      type: 'multiply',
-      icon: '✖️',
-      label: 'Multiply',
-      digits: null,
-      rows: null,
-      chars: null,
-      problems: null,
-    },
-    {
-      type: 'divide',
-      icon: '➗',
-      label: 'Divide',
-      digits: null,
-      rows: null,
-      chars: null,
-      problems: null,
-    },
-  ]
-
-  for (const line of lines) {
-    if (line.includes('Add/Sub:')) {
-      const match = line.match(/(\d+)-digit.*?(\d+)口.*?(\d+)字/)
-      if (match) {
-        sections[0].digits = match[1]
-        sections[0].rows = match[2]
-        sections[0].chars = match[3]
-      }
-    } else if (line.includes('×:')) {
-      const match = line.match(/(\d+) digits.*?\((\d+)/)
-      if (match) {
-        sections[1].digits = match[1]
-        sections[1].problems = match[2]
-      }
-    } else if (line.includes('÷:')) {
-      const match = line.match(/(\d+) digits.*?\((\d+)/)
-      if (match) {
-        sections[2].digits = match[1]
-        sections[2].problems = match[2]
-      }
-    }
-  }
-
-  return sections
-}
 
 export default function LevelsPage() {
-  const [currentIndex, setCurrentIndex] = useState(0)
-  const [isHovering, setIsHovering] = useState(false)
-  const [isPaneHovered, setIsPaneHovered] = useState(false)
-  const currentLevel = allLevels[currentIndex]
-
-  // State for animated abacus digits
-  const [animatedDigits, setAnimatedDigits] = useState<string>('')
-
-  // Initialize animated digits when level changes
-  useEffect(() => {
-    const generateRandomDigits = (numDigits: number) => {
-      return Array.from({ length: numDigits }, () => Math.floor(Math.random() * 10)).join('')
-    }
-    setAnimatedDigits(generateRandomDigits(currentLevel.digits))
-  }, [currentLevel.digits])
-
-  // Animate abacus calculations - speed increases with Dan level
-  useEffect(() => {
-    // Calculate animation speed based on level
-    // Kyu levels: 500ms
-    // Pre-1st Dan: 500ms
-    // 1st-10th Dan: interpolate from 500ms to 10ms
-    const getAnimationInterval = () => {
-      if (currentIndex < 11) {
-        // Kyu levels and Pre-1st Dan: constant 500ms
-        return 500
-      }
-      // 1st Dan through 10th Dan: speed up from 500ms to 10ms
-      // Index 11 (1st Dan) → 500ms
-      // Index 20 (10th Dan) → 10ms
-      const danProgress = (currentIndex - 11) / 9 // 0.0 to 1.0
-      return 500 - danProgress * 490 // 500ms down to 10ms
-    }
-
-    const intervalMs = getAnimationInterval()
-
-    const interval = setInterval(() => {
-      setAnimatedDigits((prev) => {
-        const digits = prev.split('').map(Number)
-        const numColumns = digits.length
-
-        // Pick 1-3 adjacent columns to change (grouping effect)
-        const groupSize = Math.floor(Math.random() * 3) + 1
-        const startCol = Math.floor(Math.random() * (numColumns - groupSize + 1))
-
-        // Change the selected columns
-        for (let i = startCol; i < startCol + groupSize && i < numColumns; i++) {
-          digits[i] = Math.floor(Math.random() * 10)
-        }
-
-        return digits.join('')
-      })
-    }, intervalMs)
-
-    return () => clearInterval(interval)
-  }, [currentIndex])
-
-  // Auto-advance slider position every 3 seconds (unless pane is hovered)
-  useEffect(() => {
-    if (isPaneHovered) return // Don't auto-advance when mouse is over the pane
-
-    const interval = setInterval(() => {
-      setCurrentIndex((prev) => {
-        // Cycle back to 0 when reaching the end
-        return prev >= allLevels.length - 1 ? 0 : prev + 1
-      })
-    }, 3000)
-
-    return () => clearInterval(interval)
-  }, [isPaneHovered])
-
-  // Handle hover on slider track
-  const handleSliderHover = (e: React.MouseEvent<HTMLSpanElement>) => {
-    const rect = e.currentTarget.getBoundingClientRect()
-    const x = e.clientX - rect.left
-    const percentage = x / rect.width
-    const index = Math.round(percentage * (allLevels.length - 1))
-    setCurrentIndex(Math.max(0, Math.min(allLevels.length - 1, index)))
-  }
-
-  // Calculate scale factor based on number of columns to fit the page
-  // Use constrained range to prevent huge size differences between levels
-  // Min 1.2 (for 30-column Dan levels) to Max 2.0 (for 2-column Kyu levels)
-  const scaleFactor = Math.max(1.2, Math.min(2.0, 20 / currentLevel.digits))
-
-  // Animate scale factor with React Spring for smooth transitions
-  const animatedProps = useSpring({
-    scaleFactor,
-    config: { tension: 350, friction: 45 },
-  })
-
-  // Animate emoji with proper cross-fade (old fades out, new fades in)
-  const emojiTransitions = useTransition(currentLevel.emoji, {
-    keys: currentIndex,
-    from: { opacity: 0 },
-    enter: { opacity: 1 },
-    leave: { opacity: 0 },
-    config: { duration: 120 },
-  })
-
-  // Convert animated digits to a number/BigInt for the abacus display
-  // Use BigInt for large numbers to get full 30-digit precision
-  const displayValue =
-    animatedDigits.length > 15
-      ? BigInt(animatedDigits || '0')
-      : Number.parseInt(animatedDigits || '0', 10)
-
-  // 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,
-    },
-  }
-
   return (
     <PageWithNav navTitle="Kyu & Dan Levels" navEmoji="📊">
       <div className={css({ bg: 'gray.900', minHeight: '100vh', pb: '12' })}>
@@ -449,471 +72,7 @@ export default function LevelsPage() {
         {/* Main content */}
         <div className={container({ maxW: '6xl', px: '4', py: '12' })}>
           <section className={stack({ gap: '8' })}>
-            {/* Current Level Display */}
-            <div
-              onMouseEnter={() => setIsPaneHovered(true)}
-              onMouseLeave={() => setIsPaneHovered(false)}
-              className={css({
-                bg: 'transparent',
-                border: '2px solid',
-                borderColor:
-                  currentLevel.color === 'green'
-                    ? 'green.500'
-                    : currentLevel.color === 'blue'
-                      ? 'blue.500'
-                      : currentLevel.color === 'violet'
-                        ? 'violet.500'
-                        : 'amber.500',
-                rounded: 'xl',
-                p: { base: '6', md: '8' },
-                height: { base: 'auto', md: '700px' },
-                display: 'flex',
-                flexDirection: 'column',
-              })}
-            >
-              {/* Abacus-themed Radix Slider */}
-              <div className={css({ mb: '6', px: { base: '2', md: '8' } })}>
-                <div className={css({ position: 'relative', py: '12' })}>
-                  {/* Emoji tick marks */}
-                  <div
-                    className={css({
-                      position: 'absolute',
-                      top: '0',
-                      left: '0',
-                      right: '0',
-                      h: 'full',
-                      display: 'flex',
-                      alignItems: 'center',
-                      pointerEvents: 'none',
-                      px: '0', // Use full width for tick spacing
-                    })}
-                  >
-                    <div
-                      className={css({
-                        position: 'relative',
-                        w: 'full',
-                        display: 'flex',
-                        justifyContent: 'space-between',
-                      })}
-                    >
-                      {allLevels.map((level, index) => (
-                        <div
-                          key={index}
-                          onClick={() => setCurrentIndex(index)}
-                          className={css({
-                            fontSize: '4xl',
-                            opacity: index === currentIndex ? '1' : '0.3',
-                            transition: 'all 0.2s',
-                            cursor: 'pointer',
-                            pointerEvents: 'auto',
-                            _hover: { opacity: index === currentIndex ? '1' : '0.6' },
-                          })}
-                        >
-                          {level.emoji}
-                        </div>
-                      ))}
-                    </div>
-                  </div>
-
-                  <Slider.Root
-                    value={[currentIndex]}
-                    onValueChange={([value]) => setCurrentIndex(value)}
-                    min={0}
-                    max={allLevels.length - 1}
-                    step={1}
-                    onMouseMove={handleSliderHover}
-                    onMouseEnter={() => setIsHovering(true)}
-                    onMouseLeave={() => setIsHovering(false)}
-                    className={css({
-                      position: 'relative',
-                      display: 'flex',
-                      alignItems: 'center',
-                      userSelect: 'none',
-                      touchAction: 'none',
-                      w: 'full',
-                      h: '32',
-                      cursor: 'pointer',
-                    })}
-                  >
-                    <Slider.Track
-                      className={css({
-                        bg: 'rgba(255, 255, 255, 0.2)',
-                        position: 'relative',
-                        flexGrow: 1,
-                        rounded: 'full',
-                        h: '3px',
-                      })}
-                    >
-                      <Slider.Range className={css({ display: 'none' })} />
-                    </Slider.Track>
-
-                    <Slider.Thumb
-                      className={css({
-                        display: 'flex',
-                        alignItems: 'center',
-                        justifyContent: 'center',
-                        position: 'relative',
-                        w: '180px',
-                        h: '128px',
-                        bg: 'transparent',
-                        cursor: 'grab',
-                        transition: 'transform 0.15s ease-out, left 0.3s ease-out',
-                        zIndex: 10,
-                        _hover: { transform: 'scale(1.15)' },
-                        _focus: {
-                          outline: 'none',
-                          transform: 'scale(1.15)',
-                        },
-                        _active: { cursor: 'grabbing' },
-                      })}
-                    >
-                      <div className={css({ opacity: 0.75 })}>
-                        <StandaloneBead
-                          size={128}
-                          color={currentLevel.color === 'violet' ? '#8b5cf6' : '#22c55e'}
-                          animated={false}
-                        />
-                      </div>
-                      {emojiTransitions((style, emoji) => (
-                        <animated.div
-                          style={style}
-                          className={css({
-                            position: 'absolute',
-                            fontSize: '9xl',
-                            pointerEvents: 'none',
-                            top: '50%',
-                            left: '50%',
-                            transform: 'translate(-50%, -50%)',
-                          })}
-                        >
-                          {emoji}
-                        </animated.div>
-                      ))}
-
-                      {/* Level text as part of the bead display */}
-                      <div
-                        className={css({
-                          position: 'absolute',
-                          bottom: '-80px',
-                          left: '50%',
-                          transform: 'translateX(-50%)',
-                          textAlign: 'center',
-                          pointerEvents: 'none',
-                          whiteSpace: 'nowrap',
-                        })}
-                      >
-                        <h2
-                          className={css({
-                            fontSize: '2xl',
-                            fontWeight: 'bold',
-                            color:
-                              currentLevel.color === 'green'
-                                ? 'green.400'
-                                : currentLevel.color === 'blue'
-                                  ? 'blue.400'
-                                  : currentLevel.color === 'violet'
-                                    ? 'violet.400'
-                                    : 'amber.400',
-                            mb: '0.5',
-                          })}
-                        >
-                          {currentLevel.level}
-                        </h2>
-                        {'name' in currentLevel && (
-                          <div
-                            className={css({
-                              fontSize: 'md',
-                              color: 'gray.300',
-                              mb: '0.5',
-                            })}
-                          >
-                            {currentLevel.name}
-                          </div>
-                        )}
-                        {'minScore' in currentLevel && (
-                          <div className={css({ fontSize: 'sm', color: 'gray.400' })}>
-                            Min: {currentLevel.minScore}pts
-                          </div>
-                        )}
-                      </div>
-                    </Slider.Thumb>
-                  </Slider.Root>
-                </div>
-
-                {/* Level Markers */}
-                <div
-                  className={css({
-                    display: 'flex',
-                    justifyContent: 'space-between',
-                    mt: '1',
-                    fontSize: 'xs',
-                    color: 'gray.500',
-                  })}
-                >
-                  <span>10th Kyu</span>
-                  <span>1st Kyu</span>
-                  <span>10th Dan</span>
-                </div>
-              </div>
-
-              {/* Abacus Display with Level Details */}
-              <div
-                className={css({
-                  display: 'flex',
-                  gap: '4',
-                  p: '6',
-                  bg: 'rgba(0, 0, 0, 0.3)',
-                  rounded: 'lg',
-                  border: '1px solid',
-                  borderColor: 'gray.700',
-                  overflow: 'hidden',
-                  flex: 1,
-                })}
-              >
-                {/* Level Details (only for Kyu levels) */}
-                {currentLevel.type === 'kyu' &&
-                  (() => {
-                    const detailsKey = getLevelDetailsKey(currentLevel.level)
-                    const rawText = detailsKey
-                      ? kyuLevelDetails[detailsKey as keyof typeof kyuLevelDetails]
-                      : null
-                    const sections = rawText ? parseKyuDetails(rawText) : []
-
-                    // Use consistent sizing across all levels
-                    const sizing = { fontSize: 'md', gap: '3', iconSize: '4xl' }
-
-                    return sections.length > 0 ? (
-                      <div
-                        className={css({
-                          flex: '0 0 auto',
-                          display: 'grid',
-                          gridTemplateColumns: 'repeat(2, 1fr)',
-                          gap: '2',
-                          p: '2',
-                          maxW: '400px',
-                          alignContent: 'center',
-                        })}
-                      >
-                        {sections.map((section, idx) => {
-                          const hasData = section.digits !== null
-                          const levelColor =
-                            currentLevel.color === 'green'
-                              ? 'green.300'
-                              : currentLevel.color === 'blue'
-                                ? 'blue.300'
-                                : 'violet.300'
-
-                          return (
-                            <div
-                              key={idx}
-                              className={css({
-                                bg: hasData ? 'rgba(0, 0, 0, 0.4)' : 'rgba(0, 0, 0, 0.2)',
-                                border: '1px solid',
-                                borderColor: hasData ? 'gray.700' : 'gray.800',
-                                rounded: 'md',
-                                p: '3',
-                                transition: 'all 0.2s',
-                                display: 'flex',
-                                flexDirection: 'column',
-                                alignItems: 'center',
-                                justifyContent: 'center',
-                                gap: '1.5',
-                                opacity: hasData ? 1 : 0.3,
-                                width: '170px',
-                                height: '150px',
-                                _hover: hasData
-                                  ? {
-                                      borderColor: 'gray.500',
-                                      transform: 'scale(1.05)',
-                                    }
-                                  : {},
-                              })}
-                            >
-                              <span className={css({ fontSize: sizing.iconSize, lineHeight: '1' })}>
-                                {section.icon}
-                              </span>
-                              {hasData && section.digits && (
-                                <>
-                                  <div
-                                    className={css({
-                                      fontSize: '2xl',
-                                      fontWeight: 'bold',
-                                      color: levelColor,
-                                    })}
-                                  >
-                                    {section.digits} digits
-                                  </div>
-                                  {(section.rows || section.chars) && (
-                                    <div
-                                      className={css({
-                                        fontSize: 'sm',
-                                        color: 'gray.400',
-                                        textAlign: 'center',
-                                      })}
-                                    >
-                                      {section.rows && `${section.rows} rows`}
-                                      {section.rows && section.chars && ' • '}
-                                      {section.chars && `${section.chars} chars`}
-                                    </div>
-                                  )}
-                                  {section.problems && (
-                                    <div
-                                      className={css({
-                                        fontSize: 'sm',
-                                        color: 'gray.400',
-                                        textAlign: 'center',
-                                      })}
-                                    >
-                                      {section.problems} problems
-                                    </div>
-                                  )}
-                                </>
-                              )}
-                              <div
-                                className={css({
-                                  fontSize: 'xs',
-                                  color: hasData ? 'gray.500' : 'gray.700',
-                                  textAlign: 'center',
-                                  fontWeight: hasData ? 'normal' : 'bold',
-                                })}
-                              >
-                                {section.label}
-                              </div>
-                            </div>
-                          )
-                        })}
-                      </div>
-                    ) : null
-                  })()}
-
-                {/* Abacus (right-aligned for Kyu, centered for Dan) */}
-                <div
-                  className={css({
-                    display: 'flex',
-                    justifyContent: currentLevel.type === 'kyu' ? 'flex-end' : 'center',
-                    alignItems: 'center',
-                    flex: 1,
-                  })}
-                >
-                  <animated.div
-                    style={{
-                      transform: animatedProps.scaleFactor.to((s) => `scale(${s / scaleFactor})`),
-                    }}
-                  >
-                    <AbacusReact
-                      value={displayValue}
-                      columns={currentLevel.digits}
-                      scaleFactor={scaleFactor}
-                      showNumbers={true}
-                      customStyles={darkStyles}
-                    />
-                  </animated.div>
-                </div>
-              </div>
-
-              {/* Digit Count */}
-              <div
-                className={css({
-                  textAlign: 'center',
-                  color: 'gray.400',
-                  fontSize: 'sm',
-                })}
-              >
-                Requires mastery of <strong>{currentLevel.digits}-digit</strong> calculations
-              </div>
-            </div>
-
-            {/* Legend */}
-            <div
-              className={css({
-                display: 'flex',
-                flexWrap: 'wrap',
-                gap: '6',
-                justifyContent: 'center',
-                p: '6',
-                bg: 'rgba(0, 0, 0, 0.3)',
-                rounded: 'lg',
-                border: '1px solid',
-                borderColor: 'gray.700',
-              })}
-            >
-              <div
-                className={css({
-                  display: 'flex',
-                  alignItems: 'center',
-                  gap: '2',
-                })}
-              >
-                <div
-                  className={css({
-                    w: '4',
-                    h: '4',
-                    bg: 'green.500',
-                    rounded: 'sm',
-                  })}
-                />
-                <span className={css({ fontSize: 'sm', color: 'gray.300' })}>
-                  Beginner (10-7 Kyu)
-                </span>
-              </div>
-              <div
-                className={css({
-                  display: 'flex',
-                  alignItems: 'center',
-                  gap: '2',
-                })}
-              >
-                <div
-                  className={css({
-                    w: '4',
-                    h: '4',
-                    bg: 'blue.500',
-                    rounded: 'sm',
-                  })}
-                />
-                <span className={css({ fontSize: 'sm', color: 'gray.300' })}>
-                  Intermediate (6-4 Kyu)
-                </span>
-              </div>
-              <div
-                className={css({
-                  display: 'flex',
-                  alignItems: 'center',
-                  gap: '2',
-                })}
-              >
-                <div
-                  className={css({
-                    w: '4',
-                    h: '4',
-                    bg: 'violet.500',
-                    rounded: 'sm',
-                  })}
-                />
-                <span className={css({ fontSize: 'sm', color: 'gray.300' })}>
-                  Advanced (3-1 Kyu)
-                </span>
-              </div>
-              <div
-                className={css({
-                  display: 'flex',
-                  alignItems: 'center',
-                  gap: '2',
-                })}
-              >
-                <div
-                  className={css({
-                    w: '4',
-                    h: '4',
-                    bg: 'amber.500',
-                    rounded: 'sm',
-                  })}
-                />
-                <span className={css({ fontSize: 'sm', color: 'gray.300' })}>
-                  Master (Dan ranks)
-                </span>
-              </div>
-            </div>
+            <LevelSliderDisplay />
 
             {/* Info Section */}
             <div

apps/web/src/app/page.tsx

@@ -8,24 +8,34 @@ import { HomeHeroProvider } from '@/contexts/HomeHeroContext'
 import { PageWithNav } from '@/components/PageWithNav'
 import { TutorialPlayer } from '@/components/tutorial/TutorialPlayer'
 import { getTutorialForEditor } from '@/utils/tutorialConverter'
+import { getAvailableGames } from '@/lib/arcade/game-registry'
+import { InteractiveFlashcards } from '@/components/InteractiveFlashcards'
+import { LevelSliderDisplay } from '@/components/LevelSliderDisplay'
 import { css } from '../../styled-system/css'
 import { container, grid, hstack, stack } from '../../styled-system/patterns'
-import { token } from '../../styled-system/tokens'
 
-// Mini abacus that cycles through random 3-digit numbers
-function MiniAbacus() {
-  const [currentValue, setCurrentValue] = useState(123)
+// Mini abacus that cycles through a sequence of values
+function MiniAbacus({
+  values,
+  columns = 3,
+  interval = 2500,
+}: {
+  values: number[]
+  columns?: number
+  interval?: number
+}) {
+  const [currentIndex, setCurrentIndex] = useState(0)
   const appConfig = useAbacusConfig()
 
   useEffect(() => {
-    // Cycle through random 3-digit numbers every 2.5 seconds
-    const interval = setInterval(() => {
-      const randomNum = Math.floor(Math.random() * 1000) // 0-999
-      setCurrentValue(randomNum)
-    }, 2500)
+    if (values.length === 0) return
 
-    return () => clearInterval(interval)
-  }, [])
+    const timer = setInterval(() => {
+      setCurrentIndex((prev) => (prev + 1) % values.length)
+    }, interval)
+
+    return () => clearInterval(timer)
+  }, [values, interval])
 
   // Dark theme styles for the abacus
   const darkStyles = {
@@ -53,8 +63,8 @@ function MiniAbacus() {
     >
       <div className={css({ transform: 'scale(0.6)', transformOrigin: 'center center' })}>
         <AbacusReact
-          value={currentValue}
-          columns={3}
+          value={values[currentIndex] || 0}
+          columns={columns}
           beadShape={appConfig.beadShape}
           customStyles={darkStyles}
         />
@@ -64,15 +74,46 @@ function MiniAbacus() {
 }
 
 export default function HomePage() {
-  // Extract just the "Friends of 5" step (2+3=5) for homepage demo
+  const [selectedSkillIndex, setSelectedSkillIndex] = useState(1) // Default to "Friends techniques"
   const fullTutorial = getTutorialForEditor()
-  const friendsOf5Tutorial = {
-    ...fullTutorial,
-    id: 'friends-of-5-demo',
-    title: 'Friends of 5',
-    description: 'Learn the "Friends of 5" technique: adding 3 to make 5',
-    steps: fullTutorial.steps.filter((step) => step.id === 'complement-2'),
-  }
+
+  // Create different tutorials for each skill level
+  const skillTutorials = [
+    // Skill 0: Read and set numbers (0-9999)
+    {
+      ...fullTutorial,
+      id: 'read-numbers-demo',
+      title: 'Read and Set Numbers',
+      description: 'Master abacus number representation from zero to thousands',
+      steps: fullTutorial.steps.filter((step) => step.id.startsWith('basic-')),
+    },
+    // Skill 1: Friends techniques (5 = 2+3)
+    {
+      ...fullTutorial,
+      id: 'friends-of-5-demo',
+      title: 'Friends of 5',
+      description: 'Add and subtract using complement pairs: 5 = 2+3',
+      steps: fullTutorial.steps.filter((step) => step.id === 'complement-2'),
+    },
+    // Skill 2: Multiply & divide (12×34)
+    {
+      ...fullTutorial,
+      id: 'multiply-demo',
+      title: 'Multiplication',
+      description: 'Fluent multi-digit calculations with advanced techniques',
+      steps: fullTutorial.steps.filter((step) => step.id.includes('complement')).slice(0, 3),
+    },
+    // Skill 3: Mental calculation (Speed math)
+    {
+      ...fullTutorial,
+      id: 'mental-calc-demo',
+      title: 'Mental Calculation',
+      description: 'Visualize and compute without the physical tool (Anzan)',
+      steps: fullTutorial.steps.slice(-3),
+    },
+  ]
+
+  const selectedTutorial = skillTutorials[selectedSkillIndex]
 
   return (
     <HomeHeroProvider>
@@ -123,9 +164,16 @@ export default function HomePage() {
                   })}
                 >
                   {/* Tutorial on the left */}
-                  <div className={css({ flex: '1' })}>
+                  <div
+                    className={css({
+                      flex: '1',
+                      minW: { base: '100%', md: '500px' },
+                      maxW: { base: '100%', md: '500px' },
+                    })}
+                  >
                     <TutorialPlayer
-                      tutorial={friendsOf5Tutorial}
+                      key={selectedTutorial.id}
+                      tutorial={selectedTutorial}
                       isDebugMode={false}
                       showDebugPanel={false}
                       hideNavigation={true}
@@ -140,8 +188,7 @@ export default function HomePage() {
                   <div
                     className={css({
                       flex: '0 0 auto',
-                      minW: '340px',
-                      maxW: { base: '100%', md: '420px' },
+                      w: { base: '100%', md: '420px' },
                     })}
                   >
                     <h3
@@ -157,122 +204,145 @@ export default function HomePage() {
                     <div className={stack({ gap: '5' })}>
                       {[
                         {
-                          icon: '🔢',
                           title: 'Read and set numbers',
                           desc: 'Master abacus number representation from zero to thousands',
                           example: '0-9999',
                           badge: 'Foundation',
+                          values: [0, 1, 2, 3, 4, 5, 10, 50, 100, 500, 999],
+                          columns: 3,
                         },
                         {
-                          icon: '🤝',
                           title: 'Friends techniques',
                           desc: 'Add and subtract using complement pairs and mental shortcuts',
                           example: '5 = 2+3',
                           badge: 'Core',
+                          values: [2, 5, 3],
+                          columns: 1,
                         },
                         {
-                          icon: '✖️➗',
                           title: 'Multiply & divide',
                           desc: 'Fluent multi-digit calculations with advanced techniques',
                           example: '12×34',
                           badge: 'Advanced',
+                          values: [12, 24, 36, 48],
+                          columns: 2,
                         },
                         {
-                          icon: '🧠',
                           title: 'Mental calculation',
                           desc: 'Visualize and compute without the physical tool (Anzan)',
                           example: 'Speed math',
                           badge: 'Expert',
+                          values: [7, 14, 21, 28, 35],
+                          columns: 2,
                         },
-                      ].map((skill, i) => (
-                        <div
-                          key={i}
-                          className={css({
-                            bg: 'linear-gradient(135deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.03))',
-                            borderRadius: 'xl',
-                            p: '4',
-                            border: '1px solid',
-                            borderColor: 'rgba(255, 255, 255, 0.15)',
-                            boxShadow: '0 4px 12px rgba(0, 0, 0, 0.3)',
-                            transition: 'all 0.2s',
-                            _hover: {
-                              bg: 'linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05))',
-                              borderColor: 'rgba(255, 255, 255, 0.25)',
-                              transform: 'translateY(-2px)',
-                              boxShadow: '0 6px 16px rgba(0, 0, 0, 0.4)',
-                            },
-                          })}
-                        >
-                          <div className={hstack({ gap: '3', alignItems: 'flex-start' })}>
-                            <div
-                              className={css({
-                                fontSize: '3xl',
-                                width: '75px',
-                                height: '115px',
-                                display: 'flex',
-                                alignItems: 'center',
-                                justifyContent: 'center',
-                                textAlign: 'center',
-                                bg: 'rgba(255, 255, 255, 0.1)',
-                                borderRadius: 'lg',
-                              })}
-                            >
-                              {i === 0 ? <MiniAbacus /> : skill.icon}
-                            </div>
-                            <div className={stack({ gap: '2', flex: '1' })}>
-                              <div className={hstack({ gap: '2', alignItems: 'center' })}>
-                                <div
-                                  className={css({
-                                    color: 'white',
-                                    fontSize: 'md',
-                                    fontWeight: 'bold',
-                                  })}
-                                >
-                                  {skill.title}
+                      ].map((skill, i) => {
+                        const isSelected = i === selectedSkillIndex
+                        return (
+                          <div
+                            key={i}
+                            onClick={() => setSelectedSkillIndex(i)}
+                            className={css({
+                              bg: isSelected
+                                ? 'linear-gradient(135deg, rgba(250, 204, 21, 0.15), rgba(250, 204, 21, 0.08))'
+                                : 'linear-gradient(135deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.03))',
+                              borderRadius: 'xl',
+                              p: '4',
+                              border: '1px solid',
+                              borderColor: isSelected
+                                ? 'rgba(250, 204, 21, 0.4)'
+                                : 'rgba(255, 255, 255, 0.15)',
+                              boxShadow: isSelected
+                                ? '0 6px 16px rgba(250, 204, 21, 0.2)'
+                                : '0 4px 12px rgba(0, 0, 0, 0.3)',
+                              transition: 'all 0.2s',
+                              cursor: 'pointer',
+                              _hover: {
+                                bg: isSelected
+                                  ? 'linear-gradient(135deg, rgba(250, 204, 21, 0.2), rgba(250, 204, 21, 0.12))'
+                                  : 'linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05))',
+                                borderColor: isSelected
+                                  ? 'rgba(250, 204, 21, 0.5)'
+                                  : 'rgba(255, 255, 255, 0.25)',
+                                transform: 'translateY(-2px)',
+                                boxShadow: isSelected
+                                  ? '0 8px 20px rgba(250, 204, 21, 0.3)'
+                                  : '0 6px 16px rgba(0, 0, 0, 0.4)',
+                              },
+                            })}
+                          >
+                            <div className={hstack({ gap: '3', alignItems: 'flex-start' })}>
+                              <div
+                                className={css({
+                                  fontSize: '3xl',
+                                  width: '75px',
+                                  height: '115px',
+                                  display: 'flex',
+                                  alignItems: 'center',
+                                  justifyContent: 'center',
+                                  textAlign: 'center',
+                                  bg: isSelected
+                                    ? 'rgba(250, 204, 21, 0.15)'
+                                    : 'rgba(255, 255, 255, 0.1)',
+                                  borderRadius: 'lg',
+                                })}
+                              >
+                                <MiniAbacus values={skill.values} columns={skill.columns} />
+                              </div>
+                              <div className={stack({ gap: '2', flex: '1' })}>
+                                <div className={hstack({ gap: '2', alignItems: 'center' })}>
+                                  <div
+                                    className={css({
+                                      color: 'white',
+                                      fontSize: 'md',
+                                      fontWeight: 'bold',
+                                    })}
+                                  >
+                                    {skill.title}
+                                  </div>
+                                  <div
+                                    className={css({
+                                      bg: 'rgba(250, 204, 21, 0.2)',
+                                      color: 'yellow.400',
+                                      fontSize: '2xs',
+                                      fontWeight: 'semibold',
+                                      px: '2',
+                                      py: '0.5',
+                                      borderRadius: 'md',
+                                    })}
+                                  >
+                                    {skill.badge}
+                                  </div>
+                                </div>
+                                <div
+                                  className={css({
+                                    color: 'gray.300',
+                                    fontSize: 'xs',
+                                    lineHeight: '1.5',
+                                  })}
+                                >
+                                  {skill.desc}
                                 </div>
                                 <div
                                   className={css({
-                                    bg: 'rgba(250, 204, 21, 0.2)',
                                     color: 'yellow.400',
-                                    fontSize: '2xs',
+                                    fontSize: 'xs',
+                                    fontFamily: 'mono',
                                     fontWeight: 'semibold',
+                                    mt: '1',
+                                    bg: 'rgba(250, 204, 21, 0.1)',
                                     px: '2',
-                                    py: '0.5',
+                                    py: '1',
                                     borderRadius: 'md',
+                                    w: 'fit-content',
                                   })}
                                 >
-                                  {skill.badge}
+                                  {skill.example}
                                 </div>
                               </div>
-                              <div
-                                className={css({
-                                  color: 'gray.300',
-                                  fontSize: 'xs',
-                                  lineHeight: '1.5',
-                                })}
-                              >
-                                {skill.desc}
-                              </div>
-                              <div
-                                className={css({
-                                  color: 'yellow.400',
-                                  fontSize: 'xs',
-                                  fontFamily: 'mono',
-                                  fontWeight: 'semibold',
-                                  mt: '1',
-                                  bg: 'rgba(250, 204, 21, 0.1)',
-                                  px: '2',
-                                  py: '1',
-                                  borderRadius: 'md',
-                                  w: 'fit-content',
-                                })}
-                              >
-                                {skill.example}
-                              </div>
                             </div>
                           </div>
-                        </div>
-                      ))}
+                        )
+                      })}
                     </div>
                   </div>
                 </div>
@@ -298,85 +368,24 @@ export default function HomePage() {
               </div>
 
               <div className={grid({ columns: { base: 1, sm: 2, lg: 4 }, gap: '5' })}>
-                <GameCard
-                  icon="🧠"
-                  title="Memory Lightning"
-                  description="Memorize soroban numbers"
-                  players="1-8 players"
-                  tags={['Memory', 'Pattern Recognition']}
-                  gradient="linear-gradient(135deg, #667eea 0%, #764ba2 100%)"
-                  href="/games"
-                />
-                <GameCard
-                  icon="⚔️"
-                  title="Matching Pairs"
-                  description="Match complement numbers"
-                  players="1-4 players"
-                  tags={['Friends of 5', 'Friends of 10']}
-                  gradient="linear-gradient(135deg, #f093fb 0%, #f5576c 100%)"
-                  href="/games"
-                />
-                <GameCard
-                  icon="🏁"
-                  title="Complement Race"
-                  description="Race against time"
-                  players="1-4 players"
-                  tags={['Speed', 'Practice', 'Survival']}
-                  gradient="linear-gradient(135deg, #4facfe 0%, #00f2fe 100%)"
-                  href="/games"
-                />
-                <GameCard
-                  icon="🔢"
-                  title="Card Sorting"
-                  description="Arrange numbers visually"
-                  players="Solo challenge"
-                  tags={['Visual Literacy', 'Ordering']}
-                  gradient="linear-gradient(135deg, #43e97b 0%, #38f9d7 100%)"
-                  href="/games"
-                />
-              </div>
-            </section>
-
-            {/* For Kids & Families Section */}
-            <section className={stack({ gap: '6', mb: '16' })}>
-              <div className={css({ textAlign: 'center' })}>
-                <h2
-                  className={css({
-                    fontSize: { base: '2xl', md: '3xl' },
-                    fontWeight: 'bold',
-                    color: 'white',
-                    mb: '2',
-                  })}
-                >
-                  For Kids & Families
-                </h2>
-                <p className={css({ color: 'gray.400', fontSize: 'md', maxW: '2xl', mx: 'auto' })}>
-                  Simple enough for kids to start on their own, structured enough for parents to
-                  trust
-                </p>
-              </div>
-
-              <div className={grid({ columns: { base: 1, lg: 2 }, gap: '8' })}>
-                <FeaturePanel
-                  icon="🧒"
-                  title="Self-Directed for Children"
-                  features={[
-                    'Big, obvious buttons and clear instructions',
-                    'Progress at your own pace',
-                    'Works with or without a physical abacus',
-                  ]}
-                  accentColor="purple"
-                />
-                <FeaturePanel
-                  icon="👨‍👩‍👧"
-                  title="Trusted by Parents"
-                  features={[
-                    'Structured curriculum following Japanese methods',
-                    'Traditional kyu/dan progression levels',
-                    'Track progress and celebrate achievements',
-                  ]}
-                  accentColor="blue"
-                />
+                {getAvailableGames().map((game) => {
+                  const playersText =
+                    game.manifest.maxPlayers === 1
+                      ? 'Solo challenge'
+                      : `1-${game.manifest.maxPlayers} players`
+                  return (
+                    <GameCard
+                      key={game.manifest.name}
+                      icon={game.manifest.icon}
+                      title={game.manifest.displayName}
+                      description={game.manifest.description}
+                      players={playersText}
+                      tags={game.manifest.chips}
+                      gradient={game.manifest.gradient}
+                      href="/games"
+                    />
+                  )
+                })}
               </div>
             </section>
 
@@ -398,150 +407,11 @@ export default function HomePage() {
                 </p>
               </div>
 
-              <Link
-                href="/levels"
-                className={css({
-                  bg: 'rgba(0, 0, 0, 0.4)',
-                  border: '1px solid',
-                  borderColor: 'gray.700',
-                  rounded: 'xl',
-                  p: '8',
-                  display: 'block',
-                  transition: 'all 0.2s',
-                  cursor: 'pointer',
-                  position: 'relative',
-                  _hover: {
-                    bg: 'rgba(0, 0, 0, 0.5)',
-                    borderColor: 'violet.500',
-                    transform: 'translateY(-2px)',
-                    boxShadow: '0 8px 16px rgba(124, 58, 237, 0.2)',
-                  },
-                })}
-              >
-                {/* Subtle arrow indicator */}
-                <div
-                  className={css({
-                    position: 'absolute',
-                    top: '4',
-                    right: '4',
-                    fontSize: 'xl',
-                    color: 'gray.500',
-                    transition: 'all 0.2s',
-                    _groupHover: {
-                      color: 'violet.400',
-                      transform: 'translateX(4px)',
-                    },
-                  })}
-                >
-                  →
-                </div>
-
-                <div
-                  className={css({
-                    display: 'flex',
-                    justifyContent: 'space-between',
-                    alignItems: 'center',
-                    gap: '4',
-                    flexWrap: 'wrap',
-                  })}
-                >
-                  {(
-                    [
-                      {
-                        level: '10 Kyu',
-                        label: 'Beginner',
-                        color: 'colors.green.400',
-                        emoji: '🧒',
-                      },
-                      {
-                        level: '5 Kyu',
-                        label: 'Intermediate',
-                        color: 'colors.blue.400',
-                        emoji: '🧑',
-                      },
-                      {
-                        level: '1 Kyu',
-                        label: 'Advanced',
-                        color: 'colors.violet.400',
-                        emoji: '🧔',
-                      },
-                      { level: 'Dan', label: 'Master', color: 'colors.amber.400', emoji: '🧙' },
-                    ] as const
-                  ).map((stage, i) => (
-                    <div
-                      key={i}
-                      className={stack({
-                        gap: '0',
-                        textAlign: 'center',
-                        flex: '1',
-                        position: 'relative',
-                      })}
-                    >
-                      <div
-                        className={css({
-                          fontSize: '5xl',
-                          mb: '0',
-                        })}
-                      >
-                        {stage.emoji}
-                      </div>
-                      <div
-                        className={css({
-                          fontSize: 'xl',
-                          fontWeight: 'bold',
-                          mt: '-2',
-                        })}
-                        style={{ color: token(stage.color) }}
-                      >
-                        {stage.level}
-                      </div>
-                      <div
-                        className={css({
-                          fontSize: 'sm',
-                          color: 'gray.300',
-                        })}
-                      >
-                        {stage.label}
-                      </div>
-                      {i < 3 && (
-                        <div
-                          style={{
-                            position: 'absolute',
-                            left: '100%',
-                            marginLeft: '0.5rem',
-                            top: '50%',
-                            transform: 'translate(-50%, -50%)',
-                            fontSize: '20px',
-                            color: '#9ca3af',
-                          }}
-                          className={css({
-                            display: { base: 'none', md: 'block' },
-                          })}
-                        >
-                          →
-                        </div>
-                      )}
-                    </div>
-                  ))}
-                </div>
-                <div
-                  style={{
-                    textAlign: 'center',
-                    fontSize: '14px',
-                    color: '#d1d5db',
-                    fontStyle: 'italic',
-                  }}
-                  className={css({
-                    mt: '6',
-                  })}
-                >
-                  Click to learn about the official Japanese ranking system →
-                </div>
-              </Link>
+              <LevelSliderDisplay />
             </section>
 
-            {/* Additional Tools Section */}
-            <section className={stack({ gap: '6' })}>
+            {/* Flashcard Generator Section */}
+            <section className={stack({ gap: '8', mb: '16' })}>
               <div className={css({ textAlign: 'center' })}>
                 <h2
                   className={css({
@@ -551,35 +421,101 @@ export default function HomePage() {
                     mb: '2',
                   })}
                 >
-                  Additional Tools
+                  Create Custom Flashcards
                 </h2>
+                <p className={css({ color: 'gray.400', fontSize: 'md', maxW: '2xl', mx: 'auto' })}>
+                  Design beautiful flashcards for learning and practice
+                </p>
               </div>
 
-              <div className={grid({ columns: { base: 1, lg: 2 }, gap: '8' })}>
-                <FeaturePanel
-                  icon="🎨"
-                  title="Flashcard Creator"
-                  features={[
-                    'Multiple formats: PDF, PNG, SVG, HTML',
-                    'Custom bead shapes, colors, and layouts',
-                    'All paper sizes: A3, A4, A5, US Letter',
-                  ]}
-                  accentColor="blue"
-                  ctaText="Create Flashcards →"
-                  ctaHref="/create"
-                />
-                <FeaturePanel
-                  icon="🧮"
-                  title="Interactive Abacus"
-                  features={[
-                    'Practice anytime in your browser',
-                    'Multiple color schemes and bead styles',
-                    'Sound effects and animations',
-                  ]}
-                  accentColor="purple"
-                  ctaText="Try the Abacus →"
-                  ctaHref="/guide"
-                />
+              {/* Combined interactive display and CTA */}
+              <div
+                className={css({
+                  bg: 'rgba(0, 0, 0, 0.4)',
+                  rounded: 'xl',
+                  p: { base: '6', md: '8' },
+                  border: '1px solid',
+                  borderColor: 'gray.700',
+                  shadow: 'lg',
+                  maxW: '1200px',
+                  mx: 'auto',
+                })}
+              >
+                {/* Interactive Flashcards Display */}
+                <div className={css({ mb: '8' })}>
+                  <InteractiveFlashcards />
+                </div>
+
+                {/* Features */}
+                <div className={grid({ columns: { base: 1, md: 3 }, gap: '4', mb: '6' })}>
+                  {[
+                    {
+                      icon: '📄',
+                      title: 'Multiple Formats',
+                      desc: 'PDF, PNG, SVG, HTML',
+                    },
+                    {
+                      icon: '🎨',
+                      title: 'Customizable',
+                      desc: 'Bead shapes, colors, layouts',
+                    },
+                    {
+                      icon: '📐',
+                      title: 'All Paper Sizes',
+                      desc: 'A3, A4, A5, US Letter',
+                    },
+                  ].map((feature, i) => (
+                    <div
+                      key={i}
+                      className={css({
+                        textAlign: 'center',
+                        p: '4',
+                        rounded: 'lg',
+                        bg: 'rgba(255, 255, 255, 0.05)',
+                      })}
+                    >
+                      <div className={css({ fontSize: '2xl', mb: '2' })}>{feature.icon}</div>
+                      <div
+                        className={css({
+                          fontSize: 'sm',
+                          fontWeight: 'semibold',
+                          color: 'white',
+                          mb: '1',
+                        })}
+                      >
+                        {feature.title}
+                      </div>
+                      <div className={css({ fontSize: 'xs', color: 'gray.400' })}>
+                        {feature.desc}
+                      </div>
+                    </div>
+                  ))}
+                </div>
+
+                {/* CTA Button */}
+                <div className={css({ textAlign: 'center' })}>
+                  <Link
+                    href="/create"
+                    className={css({
+                      display: 'inline-flex',
+                      alignItems: 'center',
+                      gap: '2',
+                      bg: 'blue.600',
+                      color: 'white',
+                      px: '6',
+                      py: '3',
+                      rounded: 'lg',
+                      fontWeight: 'semibold',
+                      transition: 'all 0.2s',
+                      _hover: {
+                        bg: 'blue.500',
+                      },
+                    })}
+                  >
+                    <span>Create Flashcards</span>
+                    <span>→</span>
+                  </Link>
+                </div>
               </div>
             </section>
           </div>
@@ -607,7 +543,7 @@ function GameCard({
   href: string
 }) {
   return (
-    <Link href={href}>
+    <Link href={href} style={{ height: '100%', display: 'block' }}>
       <div
         className={css({
           rounded: 'xl',
@@ -617,6 +553,9 @@ function GameCard({
           cursor: 'pointer',
           position: 'relative',
           overflow: 'hidden',
+          height: '100%',
+          display: 'flex',
+          flexDirection: 'column',
           _hover: {
             transform: 'translateY(-6px) scale(1.02)',
             shadow: '0 25px 50px rgba(0, 0, 0, 0.3)',
@@ -642,7 +581,15 @@ function GameCard({
           })}
         />
         {/* Content */}
-        <div className={css({ position: 'relative', zIndex: 2 })}>
+        <div
+          className={css({
+            position: 'relative',
+            zIndex: 2,
+            flex: 1,
+            display: 'flex',
+            flexDirection: 'column',
+          })}
+        >
           <div
             className={css({
               fontSize: '3xl',

apps/web/src/arcade-games/card-sorting/index.ts

@@ -24,7 +24,7 @@ const manifest: GameManifest = {
   maxPlayers: 1, // Single player only
   difficulty: 'Intermediate',
   chips: ['🧠 Pattern Recognition', '🎯 Solo Challenge', '📊 Smart Scoring'],
-  ...getGameTheme('teal'),
+  ...getGameTheme('green'),
   available: true,
 }
 

apps/web/src/arcade-games/matching/index.ts

@@ -23,7 +23,7 @@ const manifest: GameManifest = {
   maxPlayers: 4,
   difficulty: 'Intermediate',
   chips: ['👥 Multiplayer', '🎯 Strategic', '🏆 Competitive'],
-  ...getGameTheme('purple'),
+  ...getGameTheme('pink'),
   available: true,
 }
 

apps/web/src/arcade-games/memory-quiz/index.ts

@@ -23,7 +23,7 @@ const manifest: GameManifest = {
   maxPlayers: 8,
   difficulty: 'Intermediate',
   chips: ['👥 Multiplayer', '🧠 Memory', '🧮 Soroban'],
-  ...getGameTheme('blue'),
+  ...getGameTheme('purple'),
   available: true,
 }
 

apps/web/src/components/InteractiveFlashcards.tsx

@@ -0,0 +1,308 @@
+'use client'
+
+import { AbacusReact } from '@soroban/abacus-react'
+import { useDrag } from '@use-gesture/react'
+import { useEffect, useRef, useState } from 'react'
+import { animated, config, to, useSpring } from '@react-spring/web'
+import { css } from '../../styled-system/css'
+
+interface Flashcard {
+  id: number
+  number: number
+  initialX: number
+  initialY: number
+  initialRotation: number
+  zIndex: number
+}
+
+/**
+ * InteractiveFlashcards - A fun, physics-based flashcard display
+ * Users can drag and throw flashcards around with realistic momentum
+ */
+export function InteractiveFlashcards() {
+  const containerRef = useRef<HTMLDivElement>(null)
+  // Generate 8-15 random flashcards (client-side only to avoid hydration errors)
+  const [cards, setCards] = useState<Flashcard[]>([])
+
+  useEffect(() => {
+    if (!containerRef.current) return
+
+    // Double rAF pattern - ensures layout is fully complete
+    const frameId1 = requestAnimationFrame(() => {
+      const frameId2 = requestAnimationFrame(() => {
+        if (!containerRef.current) return
+
+        const containerWidth = containerRef.current.offsetWidth
+        const containerHeight = containerRef.current.offsetHeight
+
+        // Only generate cards once we have proper dimensions
+        if (containerWidth < 100 || containerHeight < 100) {
+          return
+        }
+
+        const count = Math.floor(Math.random() * 8) + 8 // 8-15 cards
+        const generated: Flashcard[] = []
+
+        // Position cards within the actual container bounds
+        const cardWidth = 120 // approximate card width
+        const cardHeight = 200 // approximate card height
+
+        for (let i = 0; i < count; i++) {
+          const card = {
+            id: i,
+            number: Math.floor(Math.random() * 900) + 100, // 100-999
+            initialX: Math.random() * (containerWidth - cardWidth - 40) + 20,
+            initialY: Math.random() * (containerHeight - cardHeight - 40) + 20,
+            initialRotation: Math.random() * 40 - 20, // -20 to 20 degrees
+            zIndex: i,
+          }
+          generated.push(card)
+        }
+
+        setCards(generated)
+      })
+    })
+
+    return () => {
+      // Note: can't cancel nested rAF properly, but component cleanup will prevent state updates
+    }
+  }, [])
+
+  return (
+    <div
+      ref={containerRef}
+      className={css({
+        position: 'relative',
+        width: '100%',
+        maxW: '1200px',
+        mx: 'auto',
+        height: { base: '400px', md: '500px' },
+        overflow: 'hidden',
+        bg: 'rgba(0, 0, 0, 0.3)',
+        rounded: 'xl',
+        border: '1px solid rgba(255, 255, 255, 0.1)',
+      })}
+    >
+      {cards.map((card) => (
+        <DraggableCard key={card.id} card={card} />
+      ))}
+    </div>
+  )
+}
+
+interface DraggableCardProps {
+  card: Flashcard
+}
+
+function DraggableCard({ card }: DraggableCardProps) {
+  // Track the card's current position in state (separate from the animation values)
+  const currentPositionRef = useRef({
+    x: card.initialX,
+    y: card.initialY,
+    rotation: card.initialRotation,
+  })
+
+  const [{ x, y, rotation, scale }, api] = useSpring(() => ({
+    x: card.initialX,
+    y: card.initialY,
+    rotation: card.initialRotation,
+    scale: 1,
+    config: config.wobbly,
+  }))
+
+  const [zIndex, setZIndex] = useState(card.zIndex)
+  const cardRef = useRef<HTMLDivElement>(null)
+  const dragOffsetRef = useRef({ x: 0, y: 0 })
+  const lastVelocityRef = useRef({ vx: 0, vy: 0 })
+  const velocityHistoryRef = useRef<Array<{ vx: number; vy: number }>>([])
+  const [transformOrigin, setTransformOrigin] = useState('center center')
+
+  const bind = useDrag(
+    ({ down, movement: [mx, my], velocity: [vx, vy], direction: [dx, dy], first, xy }) => {
+      // Bring card to front when dragging
+      if (down) {
+        setZIndex(1000)
+
+        // Calculate drag offset from card center on first touch
+        if (first && cardRef.current) {
+          const cardRect = cardRef.current.getBoundingClientRect()
+          const cardWidth = cardRect.width
+          const cardHeight = cardRect.height
+
+          // xy is in viewport coordinates, convert to position relative to card
+          const clickRelativeToCard = {
+            x: xy[0] - cardRect.left,
+            y: xy[1] - cardRect.top,
+          }
+
+          // Calculate offset from card center
+          const cardCenterX = cardWidth / 2
+          const cardCenterY = cardHeight / 2
+          const offsetX = clickRelativeToCard.x - cardCenterX
+          const offsetY = clickRelativeToCard.y - cardCenterY
+
+          dragOffsetRef.current = { x: offsetX, y: offsetY }
+
+          // Convert offset to transform-origin (50% + offset as percentage of card size)
+          const originX = 50 + (offsetX / cardWidth) * 100
+          const originY = 50 + (offsetY / cardHeight) * 100
+          const transformOriginValue = `${originX}% ${originY}%`
+
+          console.log(
+            `Drag start: click at (${clickRelativeToCard.x.toFixed(0)}, ${clickRelativeToCard.y.toFixed(0)}) in card, offset from center: (${offsetX.toFixed(0)}, ${offsetY.toFixed(0)}), origin: ${transformOriginValue}`
+          )
+
+          setTransformOrigin(transformOriginValue)
+          velocityHistoryRef.current = []
+        }
+
+        // Smooth velocity by averaging last 3 frames
+        velocityHistoryRef.current.push({ vx, vy })
+        if (velocityHistoryRef.current.length > 3) {
+          velocityHistoryRef.current.shift()
+        }
+
+        const avgVx =
+          velocityHistoryRef.current.reduce((sum, v) => sum + v.vx, 0) /
+          velocityHistoryRef.current.length
+        const avgVy =
+          velocityHistoryRef.current.reduce((sum, v) => sum + v.vy, 0) /
+          velocityHistoryRef.current.length
+
+        // Calculate rotation based on smoothed velocity and drag offset
+        const velocityAngle = Math.atan2(avgVy, avgVx) * (180 / Math.PI)
+        const offsetAngle =
+          Math.atan2(dragOffsetRef.current.y, dragOffsetRef.current.x) * (180 / Math.PI)
+
+        // Card rotates to align with movement direction, offset by where we're grabbing
+        const targetRotation = velocityAngle - offsetAngle + 90
+
+        const speed = Math.sqrt(avgVx * avgVx + avgVy * avgVy)
+
+        // Store smoothed velocity for throw
+        lastVelocityRef.current = { vx: avgVx, vy: avgVy }
+
+        const finalRotation = speed > 0.01 ? targetRotation : currentPositionRef.current.rotation
+
+        api.start({
+          x: currentPositionRef.current.x + mx,
+          y: currentPositionRef.current.y + my,
+          scale: 1.1,
+          rotation: finalRotation,
+          immediate: (key) => key !== 'rotation', // Position immediate, rotation smooth
+          config: { tension: 200, friction: 30 }, // Smoother rotation spring
+        })
+      } else {
+        // On release, reset transform origin to center
+        setTransformOrigin('center center')
+
+        // On release, apply momentum with decay physics
+        const throwVelocityX = lastVelocityRef.current.vx * 1000
+        const throwVelocityY = lastVelocityRef.current.vy * 1000
+
+        // Calculate final rotation based on throw direction
+        const throwAngle = Math.atan2(throwVelocityY, throwVelocityX) * (180 / Math.PI)
+
+        api.start({
+          x: {
+            from: currentPositionRef.current.x + mx,
+            velocity: throwVelocityX,
+            decay: true,
+          },
+          y: {
+            from: currentPositionRef.current.y + my,
+            velocity: throwVelocityY,
+            decay: true,
+          },
+          scale: 1,
+          rotation: throwAngle + 90, // Card aligns with throw direction
+          config: config.wobbly,
+          onChange: (result) => {
+            // Update current position as card settles
+            if (result.value.x !== undefined) {
+              currentPositionRef.current.x = result.value.x
+            }
+            if (result.value.y !== undefined) {
+              currentPositionRef.current.y = result.value.y
+            }
+            if (result.value.rotation !== undefined) {
+              currentPositionRef.current.rotation = result.value.rotation
+            }
+          },
+        })
+      }
+    },
+    {
+      // Prevent scrolling when dragging
+      preventDefault: true,
+      filterTaps: true,
+    }
+  )
+
+  return (
+    <animated.div
+      ref={cardRef}
+      {...bind()}
+      style={{
+        position: 'absolute',
+        left: 0,
+        top: 0,
+        transform: to(
+          [x, y, rotation, scale],
+          (x, y, r, s) => `translate(${x}px, ${y}px) rotate(${r}deg) scale(${s})`
+        ),
+        transformOrigin,
+        zIndex,
+        touchAction: 'none',
+        cursor: 'grab',
+      }}
+      className={css({
+        userSelect: 'none',
+        _active: {
+          cursor: 'grabbing',
+        },
+      })}
+    >
+      <div
+        className={css({
+          bg: 'white',
+          rounded: 'lg',
+          p: '4',
+          boxShadow: '0 8px 24px rgba(0, 0, 0, 0.3)',
+          display: 'flex',
+          flexDirection: 'column',
+          alignItems: 'center',
+          gap: '2',
+          minW: '120px',
+          border: '2px solid rgba(0, 0, 0, 0.1)',
+          transition: 'box-shadow 0.2s',
+          _hover: {
+            boxShadow: '0 12px 32px rgba(0, 0, 0, 0.4)',
+          },
+        })}
+      >
+        {/* Abacus visualization */}
+        <div
+          className={css({
+            transform: 'scale(0.6)',
+            transformOrigin: 'center',
+          })}
+        >
+          <AbacusReact value={card.number} columns={3} beadShape="circle" />
+        </div>
+
+        {/* Number display */}
+        <div
+          className={css({
+            fontSize: 'xl',
+            fontWeight: 'bold',
+            color: 'gray.800',
+            fontFamily: 'mono',
+          })}
+        >
+          {card.number}
+        </div>
+      </div>
+    </animated.div>
+  )
+}

apps/web/src/components/LevelSliderDisplay.tsx

@@ -0,0 +1,862 @@
+'use client'
+
+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 { css } from '../../styled-system/css'
+import { stack } from '../../styled-system/patterns'
+import { kyuLevelDetails } from '@/data/kyuLevelDetails'
+
+// Combine all levels into one array for the slider
+const allLevels = [
+  {
+    level: '10th Kyu',
+    emoji: '🧒',
+    color: 'green',
+    digits: 2,
+    type: 'kyu' as const,
+  },
+  {
+    level: '9th Kyu',
+    emoji: '🧒',
+    color: 'green',
+    digits: 2,
+    type: 'kyu' as const,
+  },
+  {
+    level: '8th Kyu',
+    emoji: '🧒',
+    color: 'green',
+    digits: 3,
+    type: 'kyu' as const,
+  },
+  {
+    level: '7th Kyu',
+    emoji: '🧒',
+    color: 'green',
+    digits: 4,
+    type: 'kyu' as const,
+  },
+  {
+    level: '6th Kyu',
+    emoji: '🧑',
+    color: 'blue',
+    digits: 5,
+    type: 'kyu' as const,
+  },
+  {
+    level: '5th Kyu',
+    emoji: '🧑',
+    color: 'blue',
+    digits: 6,
+    type: 'kyu' as const,
+  },
+  {
+    level: '4th Kyu',
+    emoji: '🧑',
+    color: 'blue',
+    digits: 7,
+    type: 'kyu' as const,
+  },
+  {
+    level: '3rd Kyu',
+    emoji: '🧔',
+    color: 'violet',
+    digits: 8,
+    type: 'kyu' as const,
+  },
+  {
+    level: '2nd Kyu',
+    emoji: '🧔',
+    color: 'violet',
+    digits: 9,
+    type: 'kyu' as const,
+  },
+  {
+    level: '1st Kyu',
+    emoji: '🧔',
+    color: 'violet',
+    digits: 10,
+    type: 'kyu' as const,
+  },
+  {
+    level: 'Pre-1st Dan',
+    name: 'Jun-Shodan',
+    minScore: 90,
+    emoji: '🧙',
+    color: 'amber',
+    digits: 30,
+    type: 'dan' as const,
+  },
+  {
+    level: '1st Dan',
+    name: 'Shodan',
+    minScore: 100,
+    emoji: '🧙',
+    color: 'amber',
+    digits: 30,
+    type: 'dan' as const,
+  },
+  {
+    level: '2nd Dan',
+    name: 'Nidan',
+    minScore: 120,
+    emoji: '🧙‍♂️',
+    color: 'amber',
+    digits: 30,
+    type: 'dan' as const,
+  },
+  {
+    level: '3rd Dan',
+    name: 'Sandan',
+    minScore: 140,
+    emoji: '🧙‍♂️',
+    color: 'amber',
+    digits: 30,
+    type: 'dan' as const,
+  },
+  {
+    level: '4th Dan',
+    name: 'Yondan',
+    minScore: 160,
+    emoji: '🧙‍♀️',
+    color: 'amber',
+    digits: 30,
+    type: 'dan' as const,
+  },
+  {
+    level: '5th Dan',
+    name: 'Godan',
+    minScore: 180,
+    emoji: '🧙‍♀️',
+    color: 'amber',
+    digits: 30,
+    type: 'dan' as const,
+  },
+  {
+    level: '6th Dan',
+    name: 'Rokudan',
+    minScore: 200,
+    emoji: '🧝',
+    color: 'amber',
+    digits: 30,
+    type: 'dan' as const,
+  },
+  {
+    level: '7th Dan',
+    name: 'Nanadan',
+    minScore: 220,
+    emoji: '🧝',
+    color: 'amber',
+    digits: 30,
+    type: 'dan' as const,
+  },
+  {
+    level: '8th Dan',
+    name: 'Hachidan',
+    minScore: 250,
+    emoji: '🧝‍♂️',
+    color: 'amber',
+    digits: 30,
+    type: 'dan' as const,
+  },
+  {
+    level: '9th Dan',
+    name: 'Kudan',
+    minScore: 270,
+    emoji: '🧝‍♀️',
+    color: 'amber',
+    digits: 30,
+    type: 'dan' as const,
+  },
+  {
+    level: '10th Dan',
+    name: 'Judan',
+    minScore: 290,
+    emoji: '👑',
+    color: 'amber',
+    digits: 30,
+    type: 'dan' as const,
+  },
+] as const
+
+// Helper function to map level names to kyuLevelDetails keys
+function getLevelDetailsKey(levelName: string): string | null {
+  // Convert "10th Kyu" → "10-kyu", "3rd Kyu" → "3-kyu", etc.
+  const match = levelName.match(/^(\d+)(?:st|nd|rd|th)\s+Kyu$/)
+  if (match) {
+    return `${match[1]}-kyu`
+  }
+  return null
+}
+
+// Parse and format kyu level details into structured sections with icons
+function parseKyuDetails(rawText: string) {
+  const lines = rawText.split('\n').filter((line) => line.trim() && !line.includes('shuzan.jp'))
+
+  // Always return sections in consistent order: Add/Sub, Multiply, Divide
+  const sections: Array<{
+    type: 'addSub' | 'multiply' | 'divide'
+    icon: string
+    label: string
+    digits: string | null
+    rows: string | null
+    chars: string | null
+    problems: string | null
+  }> = [
+    {
+      type: 'addSub',
+      icon: '➕➖',
+      label: 'Add/Sub',
+      digits: null,
+      rows: null,
+      chars: null,
+      problems: null,
+    },
+    {
+      type: 'multiply',
+      icon: '✖️',
+      label: 'Multiply',
+      digits: null,
+      rows: null,
+      chars: null,
+      problems: null,
+    },
+    {
+      type: 'divide',
+      icon: '➗',
+      label: 'Divide',
+      digits: null,
+      rows: null,
+      chars: null,
+      problems: null,
+    },
+  ]
+
+  for (const line of lines) {
+    if (line.includes('Add/Sub:')) {
+      const match = line.match(/(\d+)-digit.*?(\d+)口.*?(\d+)字/)
+      if (match) {
+        sections[0].digits = match[1]
+        sections[0].rows = match[2]
+        sections[0].chars = match[3]
+      }
+    } else if (line.includes('×:')) {
+      const match = line.match(/(\d+) digits.*?\((\d+)/)
+      if (match) {
+        sections[1].digits = match[1]
+        sections[1].problems = match[2]
+      }
+    } else if (line.includes('÷:')) {
+      const match = line.match(/(\d+) digits.*?\((\d+)/)
+      if (match) {
+        sections[2].digits = match[1]
+        sections[2].problems = match[2]
+      }
+    }
+  }
+
+  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,
+  },
+}
+
+interface LevelSliderDisplayProps {
+  initialIndex?: number
+  autoAdvanceEnabled?: boolean
+  autoAdvanceInterval?: number
+  showLegend?: boolean
+}
+
+export function LevelSliderDisplay({
+  initialIndex = 0,
+  autoAdvanceEnabled = true,
+  autoAdvanceInterval = 3000,
+  showLegend = true,
+}: LevelSliderDisplayProps) {
+  const [currentIndex, setCurrentIndex] = useState(initialIndex)
+  const [isHovering, setIsHovering] = useState(false)
+  const [isPaneHovered, setIsPaneHovered] = useState(false)
+  const currentLevel = allLevels[currentIndex]
+
+  // State for animated abacus digits
+  const [animatedDigits, setAnimatedDigits] = useState<string>('')
+
+  // Initialize animated digits when level changes
+  useEffect(() => {
+    const generateRandomDigits = (numDigits: number) => {
+      return Array.from({ length: numDigits }, () => Math.floor(Math.random() * 10)).join('')
+    }
+    setAnimatedDigits(generateRandomDigits(currentLevel.digits))
+  }, [currentLevel.digits])
+
+  // Animate abacus calculations - speed increases with Dan level
+  useEffect(() => {
+    // Calculate animation speed based on level
+    // Kyu levels: 500ms
+    // Pre-1st Dan: 500ms
+    // 1st-10th Dan: interpolate from 500ms to 10ms
+    const getAnimationInterval = () => {
+      if (currentIndex < 11) {
+        // Kyu levels and Pre-1st Dan: constant 500ms
+        return 500
+      }
+      // 1st Dan through 10th Dan: speed up from 500ms to 10ms
+      // Index 11 (1st Dan) → 500ms
+      // Index 20 (10th Dan) → 10ms
+      const danProgress = (currentIndex - 11) / 9 // 0.0 to 1.0
+      return 500 - danProgress * 490 // 500ms down to 10ms
+    }
+
+    const intervalMs = getAnimationInterval()
+
+    const interval = setInterval(() => {
+      setAnimatedDigits((prev) => {
+        const digits = prev.split('').map(Number)
+        const numColumns = digits.length
+
+        // Pick 1-3 adjacent columns to change (grouping effect)
+        const groupSize = Math.floor(Math.random() * 3) + 1
+        const startCol = Math.floor(Math.random() * (numColumns - groupSize + 1))
+
+        // Change the selected columns
+        for (let i = startCol; i < startCol + groupSize && i < numColumns; i++) {
+          digits[i] = Math.floor(Math.random() * 10)
+        }
+
+        return digits.join('')
+      })
+    }, intervalMs)
+
+    return () => clearInterval(interval)
+  }, [currentIndex])
+
+  // Auto-advance slider position every 3 seconds (unless pane is hovered)
+  useEffect(() => {
+    if (!autoAdvanceEnabled || isPaneHovered) return
+
+    const interval = setInterval(() => {
+      setCurrentIndex((prev) => {
+        // Cycle back to 0 when reaching the end
+        return prev >= allLevels.length - 1 ? 0 : prev + 1
+      })
+    }, autoAdvanceInterval)
+
+    return () => clearInterval(interval)
+  }, [autoAdvanceEnabled, isPaneHovered, autoAdvanceInterval])
+
+  // Handle hover on slider track
+  const handleSliderHover = (e: React.MouseEvent<HTMLSpanElement>) => {
+    const rect = e.currentTarget.getBoundingClientRect()
+    const x = e.clientX - rect.left
+    const percentage = x / rect.width
+    const index = Math.round(percentage * (allLevels.length - 1))
+    setCurrentIndex(Math.max(0, Math.min(allLevels.length - 1, index)))
+  }
+
+  // Calculate scale factor based on number of columns to fit the page
+  // Use constrained range to prevent huge size differences between levels
+  // Min 1.2 (for 30-column Dan levels) to Max 2.0 (for 2-column Kyu levels)
+  const scaleFactor = Math.max(1.2, Math.min(2.0, 20 / currentLevel.digits))
+
+  // Animate scale factor with React Spring for smooth transitions
+  const animatedProps = useSpring({
+    scaleFactor,
+    config: { tension: 350, friction: 45 },
+  })
+
+  // Animate emoji with proper cross-fade (old fades out, new fades in)
+  const emojiTransitions = useTransition(currentLevel.emoji, {
+    keys: currentIndex,
+    from: { opacity: 0 },
+    enter: { opacity: 1 },
+    leave: { opacity: 0 },
+    config: { duration: 120 },
+  })
+
+  // Convert animated digits to a number/BigInt for the abacus display
+  // Use BigInt for large numbers to get full 30-digit precision
+  const displayValue =
+    animatedDigits.length > 15
+      ? BigInt(animatedDigits || '0')
+      : Number.parseInt(animatedDigits || '0', 10)
+
+  return (
+    <div className={stack({ gap: '8' })}>
+      {/* Current Level Display */}
+      <div
+        onMouseEnter={() => setIsPaneHovered(true)}
+        onMouseLeave={() => setIsPaneHovered(false)}
+        className={css({
+          bg: 'transparent',
+          border: '2px solid',
+          borderColor:
+            currentLevel.color === 'green'
+              ? 'green.500'
+              : currentLevel.color === 'blue'
+                ? 'blue.500'
+                : currentLevel.color === 'violet'
+                  ? 'violet.500'
+                  : 'amber.500',
+          rounded: 'xl',
+          p: { base: '6', md: '8' },
+          height: { base: 'auto', md: '700px' },
+          display: 'flex',
+          flexDirection: 'column',
+        })}
+      >
+        {/* Abacus-themed Radix Slider */}
+        <div className={css({ mb: '6', px: { base: '2', md: '8' } })}>
+          <div className={css({ position: 'relative', py: '12' })}>
+            {/* Emoji tick marks */}
+            <div
+              className={css({
+                position: 'absolute',
+                top: '0',
+                left: '0',
+                right: '0',
+                h: 'full',
+                display: 'flex',
+                alignItems: 'center',
+                pointerEvents: 'none',
+                px: '0', // Use full width for tick spacing
+              })}
+            >
+              <div
+                className={css({
+                  position: 'relative',
+                  w: 'full',
+                  display: 'flex',
+                  justifyContent: 'space-between',
+                })}
+              >
+                {allLevels.map((level, index) => (
+                  <div
+                    key={index}
+                    onClick={() => setCurrentIndex(index)}
+                    className={css({
+                      fontSize: '4xl',
+                      opacity: index === currentIndex ? '1' : '0.3',
+                      transition: 'all 0.2s',
+                      cursor: 'pointer',
+                      pointerEvents: 'auto',
+                      _hover: { opacity: index === currentIndex ? '1' : '0.6' },
+                    })}
+                  >
+                    {level.emoji}
+                  </div>
+                ))}
+              </div>
+            </div>
+
+            <Slider.Root
+              value={[currentIndex]}
+              onValueChange={([value]) => setCurrentIndex(value)}
+              min={0}
+              max={allLevels.length - 1}
+              step={1}
+              onMouseMove={handleSliderHover}
+              onMouseEnter={() => setIsHovering(true)}
+              onMouseLeave={() => setIsHovering(false)}
+              className={css({
+                position: 'relative',
+                display: 'flex',
+                alignItems: 'center',
+                userSelect: 'none',
+                touchAction: 'none',
+                w: 'full',
+                h: '32',
+                cursor: 'pointer',
+              })}
+            >
+              <Slider.Track
+                className={css({
+                  bg: 'rgba(255, 255, 255, 0.2)',
+                  position: 'relative',
+                  flexGrow: 1,
+                  rounded: 'full',
+                  h: '3px',
+                })}
+              >
+                <Slider.Range className={css({ display: 'none' })} />
+              </Slider.Track>
+
+              <Slider.Thumb
+                className={css({
+                  display: 'flex',
+                  alignItems: 'center',
+                  justifyContent: 'center',
+                  position: 'relative',
+                  w: '180px',
+                  h: '128px',
+                  bg: 'transparent',
+                  cursor: 'grab',
+                  transition: 'transform 0.15s ease-out, left 0.3s ease-out',
+                  zIndex: 10,
+                  _hover: { transform: 'scale(1.15)' },
+                  _focus: {
+                    outline: 'none',
+                    transform: 'scale(1.15)',
+                  },
+                  _active: { cursor: 'grabbing' },
+                })}
+              >
+                <div className={css({ opacity: 0.75 })}>
+                  <StandaloneBead
+                    size={128}
+                    color={currentLevel.color === 'violet' ? '#8b5cf6' : '#22c55e'}
+                    animated={false}
+                  />
+                </div>
+                {emojiTransitions((style, emoji) => (
+                  <animated.div
+                    style={style}
+                    className={css({
+                      position: 'absolute',
+                      fontSize: '9xl',
+                      pointerEvents: 'none',
+                      top: '50%',
+                      left: '50%',
+                      transform: 'translate(-50%, -50%)',
+                    })}
+                  >
+                    {emoji}
+                  </animated.div>
+                ))}
+
+                {/* Level text as part of the bead display */}
+                <div
+                  className={css({
+                    position: 'absolute',
+                    bottom: '-80px',
+                    left: '50%',
+                    transform: 'translateX(-50%)',
+                    textAlign: 'center',
+                    pointerEvents: 'none',
+                    whiteSpace: 'nowrap',
+                  })}
+                >
+                  <h2
+                    className={css({
+                      fontSize: '2xl',
+                      fontWeight: 'bold',
+                      color:
+                        currentLevel.color === 'green'
+                          ? 'green.400'
+                          : currentLevel.color === 'blue'
+                            ? 'blue.400'
+                            : currentLevel.color === 'violet'
+                              ? 'violet.400'
+                              : 'amber.400',
+                      mb: '0.5',
+                    })}
+                  >
+                    {currentLevel.level}
+                  </h2>
+                  {'name' in currentLevel && (
+                    <div
+                      className={css({
+                        fontSize: 'md',
+                        color: 'gray.300',
+                        mb: '0.5',
+                      })}
+                    >
+                      {currentLevel.name}
+                    </div>
+                  )}
+                  {'minScore' in currentLevel && (
+                    <div className={css({ fontSize: 'sm', color: 'gray.400' })}>
+                      Min: {currentLevel.minScore}pts
+                    </div>
+                  )}
+                </div>
+              </Slider.Thumb>
+            </Slider.Root>
+          </div>
+
+          {/* Level Markers */}
+          <div
+            className={css({
+              display: 'flex',
+              justifyContent: 'space-between',
+              mt: '1',
+              fontSize: 'xs',
+              color: 'gray.500',
+            })}
+          >
+            <span>10th Kyu</span>
+            <span>1st Kyu</span>
+            <span>10th Dan</span>
+          </div>
+        </div>
+
+        {/* Abacus Display with Level Details */}
+        <div
+          className={css({
+            display: 'flex',
+            gap: '4',
+            p: '6',
+            bg: 'rgba(0, 0, 0, 0.3)',
+            rounded: 'lg',
+            border: '1px solid',
+            borderColor: 'gray.700',
+            overflow: 'hidden',
+            flex: 1,
+          })}
+        >
+          {/* Level Details (only for Kyu levels) */}
+          {currentLevel.type === 'kyu' &&
+            (() => {
+              const detailsKey = getLevelDetailsKey(currentLevel.level)
+              const rawText = detailsKey
+                ? kyuLevelDetails[detailsKey as keyof typeof kyuLevelDetails]
+                : null
+              const sections = rawText ? parseKyuDetails(rawText) : []
+
+              // Use consistent sizing across all levels
+              const sizing = { fontSize: 'md', gap: '3', iconSize: '4xl' }
+
+              return sections.length > 0 ? (
+                <div
+                  className={css({
+                    flex: '0 0 auto',
+                    display: 'grid',
+                    gridTemplateColumns: 'repeat(2, 1fr)',
+                    gap: '2',
+                    p: '2',
+                    maxW: '400px',
+                    alignContent: 'center',
+                  })}
+                >
+                  {sections.map((section, idx) => {
+                    const hasData = section.digits !== null
+                    const levelColor =
+                      currentLevel.color === 'green'
+                        ? 'green.300'
+                        : currentLevel.color === 'blue'
+                          ? 'blue.300'
+                          : 'violet.300'
+
+                    return (
+                      <div
+                        key={idx}
+                        className={css({
+                          bg: hasData ? 'rgba(0, 0, 0, 0.4)' : 'rgba(0, 0, 0, 0.2)',
+                          border: '1px solid',
+                          borderColor: hasData ? 'gray.700' : 'gray.800',
+                          rounded: 'md',
+                          p: '3',
+                          transition: 'all 0.2s',
+                          display: 'flex',
+                          flexDirection: 'column',
+                          alignItems: 'center',
+                          justifyContent: 'center',
+                          gap: '1.5',
+                          opacity: hasData ? 1 : 0.3,
+                          width: '170px',
+                          height: '150px',
+                          _hover: hasData
+                            ? {
+                                borderColor: 'gray.500',
+                                transform: 'scale(1.05)',
+                              }
+                            : {},
+                        })}
+                      >
+                        <span className={css({ fontSize: sizing.iconSize, lineHeight: '1' })}>
+                          {section.icon}
+                        </span>
+                        {hasData && section.digits && (
+                          <>
+                            <div
+                              className={css({
+                                fontSize: '2xl',
+                                fontWeight: 'bold',
+                                color: levelColor,
+                              })}
+                            >
+                              {section.digits} digits
+                            </div>
+                            {(section.rows || section.chars) && (
+                              <div
+                                className={css({
+                                  fontSize: 'sm',
+                                  color: 'gray.400',
+                                  textAlign: 'center',
+                                })}
+                              >
+                                {section.rows && `${section.rows} rows`}
+                                {section.rows && section.chars && ' • '}
+                                {section.chars && `${section.chars} chars`}
+                              </div>
+                            )}
+                            {section.problems && (
+                              <div
+                                className={css({
+                                  fontSize: 'sm',
+                                  color: 'gray.400',
+                                  textAlign: 'center',
+                                })}
+                              >
+                                {section.problems} problems
+                              </div>
+                            )}
+                          </>
+                        )}
+                        <div
+                          className={css({
+                            fontSize: 'xs',
+                            color: hasData ? 'gray.500' : 'gray.700',
+                            textAlign: 'center',
+                            fontWeight: hasData ? 'normal' : 'bold',
+                          })}
+                        >
+                          {section.label}
+                        </div>
+                      </div>
+                    )
+                  })}
+                </div>
+              ) : null
+            })()}
+
+          {/* Abacus (right-aligned for Kyu, centered for Dan) */}
+          <div
+            className={css({
+              display: 'flex',
+              justifyContent: currentLevel.type === 'kyu' ? 'flex-end' : 'center',
+              alignItems: 'center',
+              flex: 1,
+            })}
+          >
+            <animated.div
+              style={{
+                transform: animatedProps.scaleFactor.to((s) => `scale(${s / scaleFactor})`),
+              }}
+            >
+              <AbacusReact
+                value={displayValue}
+                columns={currentLevel.digits}
+                scaleFactor={scaleFactor}
+                showNumbers={true}
+                customStyles={darkStyles}
+              />
+            </animated.div>
+          </div>
+        </div>
+
+        {/* Digit Count */}
+        <div
+          className={css({
+            textAlign: 'center',
+            color: 'gray.400',
+            fontSize: 'sm',
+          })}
+        >
+          Requires mastery of <strong>{currentLevel.digits}-digit</strong> calculations
+        </div>
+      </div>
+
+      {/* Legend */}
+      {showLegend && (
+        <div
+          className={css({
+            display: 'flex',
+            flexWrap: 'wrap',
+            gap: '6',
+            justifyContent: 'center',
+            p: '6',
+            bg: 'rgba(0, 0, 0, 0.3)',
+            rounded: 'lg',
+            border: '1px solid',
+            borderColor: 'gray.700',
+          })}
+        >
+          <div
+            className={css({
+              display: 'flex',
+              alignItems: 'center',
+              gap: '2',
+            })}
+          >
+            <div
+              className={css({
+                w: '4',
+                h: '4',
+                bg: 'green.500',
+                rounded: 'sm',
+              })}
+            />
+            <span className={css({ fontSize: 'sm', color: 'gray.300' })}>Beginner (10-7 Kyu)</span>
+          </div>
+          <div
+            className={css({
+              display: 'flex',
+              alignItems: 'center',
+              gap: '2',
+            })}
+          >
+            <div
+              className={css({
+                w: '4',
+                h: '4',
+                bg: 'blue.500',
+                rounded: 'sm',
+              })}
+            />
+            <span className={css({ fontSize: 'sm', color: 'gray.300' })}>
+              Intermediate (6-4 Kyu)
+            </span>
+          </div>
+          <div
+            className={css({
+              display: 'flex',
+              alignItems: 'center',
+              gap: '2',
+            })}
+          >
+            <div
+              className={css({
+                w: '4',
+                h: '4',
+                bg: 'violet.500',
+                rounded: 'sm',
+              })}
+            />
+            <span className={css({ fontSize: 'sm', color: 'gray.300' })}>Advanced (3-1 Kyu)</span>
+          </div>
+          <div
+            className={css({
+              display: 'flex',
+              alignItems: 'center',
+              gap: '2',
+            })}
+          >
+            <div
+              className={css({
+                w: '4',
+                h: '4',
+                bg: 'amber.500',
+                rounded: 'sm',
+              })}
+            />
+            <span className={css({ fontSize: 'sm', color: 'gray.300' })}>Master (Dan ranks)</span>
+          </div>
+        </div>
+      )}
+    </div>
+  )
+}

apps/web/src/lib/arcade/game-themes.ts

@@ -14,59 +14,59 @@ export interface GameTheme {
 }
 
 /**
- * Standard theme presets
- * These use Panda CSS's color system and provide consistent styling
+ * Standard theme presets with vibrant gradients
+ * Updated for eye-catching game cards on the homepage
  */
 export const GAME_THEMES = {
   blue: {
     color: 'blue',
-    gradient: 'linear-gradient(135deg, #dbeafe, #bfdbfe)', // blue.100 to blue.200
-    borderColor: '#bfdbfe', // blue.200
+    gradient: 'linear-gradient(135deg, #4facfe 0%, #00f2fe 100%)', // Vibrant cyan
+    borderColor: '#00f2fe',
   },
   purple: {
     color: 'purple',
-    gradient: 'linear-gradient(135deg, #e9d5ff, #ddd6fe)', // purple.100 to purple.200
-    borderColor: '#ddd6fe', // purple.200
+    gradient: 'linear-gradient(135deg, #667eea 0%, #764ba2 100%)', // Vibrant purple
+    borderColor: '#764ba2',
   },
   green: {
     color: 'green',
-    gradient: 'linear-gradient(135deg, #d1fae5, #a7f3d0)', // green.100 to green.200
-    borderColor: '#a7f3d0', // green.200
+    gradient: 'linear-gradient(135deg, #43e97b 0%, #38f9d7 100%)', // Vibrant green/teal
+    borderColor: '#38f9d7',
   },
   teal: {
     color: 'teal',
-    gradient: 'linear-gradient(135deg, #ccfbf1, #99f6e4)', // teal.100 to teal.200
-    borderColor: '#99f6e4', // teal.200
+    gradient: 'linear-gradient(135deg, #11998e 0%, #38ef7d 100%)', // Vibrant teal
+    borderColor: '#38ef7d',
   },
   indigo: {
     color: 'indigo',
-    gradient: 'linear-gradient(135deg, #e0e7ff, #c7d2fe)', // indigo.100 to indigo.200
-    borderColor: '#c7d2fe', // indigo.200
+    gradient: 'linear-gradient(135deg, #5f72bd 0%, #9b23ea 100%)', // Vibrant indigo
+    borderColor: '#9b23ea',
   },
   pink: {
     color: 'pink',
-    gradient: 'linear-gradient(135deg, #fce7f3, #fbcfe8)', // pink.100 to pink.200
-    borderColor: '#fbcfe8', // pink.200
+    gradient: 'linear-gradient(135deg, #f093fb 0%, #f5576c 100%)', // Vibrant pink
+    borderColor: '#f5576c',
   },
   orange: {
     color: 'orange',
-    gradient: 'linear-gradient(135deg, #ffedd5, #fed7aa)', // orange.100 to orange.200
-    borderColor: '#fed7aa', // orange.200
+    gradient: 'linear-gradient(135deg, #fa709a 0%, #fee140 100%)', // Vibrant orange/coral
+    borderColor: '#fee140',
   },
   yellow: {
     color: 'yellow',
-    gradient: 'linear-gradient(135deg, #fef3c7, #fde68a)', // yellow.100 to yellow.200
-    borderColor: '#fde68a', // yellow.200
+    gradient: 'linear-gradient(135deg, #ffd89b 0%, #19547b 100%)', // Vibrant yellow/blue
+    borderColor: '#ffd89b',
   },
   red: {
     color: 'red',
-    gradient: 'linear-gradient(135deg, #fee2e2, #fecaca)', // red.100 to red.200
-    borderColor: '#fecaca', // red.200
+    gradient: 'linear-gradient(135deg, #f85032 0%, #e73827 100%)', // Vibrant red
+    borderColor: '#e73827',
   },
   gray: {
     color: 'gray',
-    gradient: 'linear-gradient(135deg, #f3f4f6, #e5e7eb)', // gray.100 to gray.200
-    borderColor: '#e5e7eb', // gray.200
+    gradient: 'linear-gradient(135deg, #868f96 0%, #596164 100%)', // Vibrant gray
+    borderColor: '#596164',
   },
 } as const satisfies Record<string, GameTheme>
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "soroban-monorepo",
-  "version": "4.48.5",
+  "version": "4.54.0",
   "private": true,
   "description": "Beautiful Soroban Flashcard Generator - Monorepo",
   "workspaces": [

pnpm-lock.yaml

@@ -134,6 +134,9 @@ importers:
       '@types/jsdom':
         specifier: ^21.1.7
         version: 21.1.7
+      '@use-gesture/react':
+        specifier: ^10.3.1
+        version: 10.3.1(react@18.3.1)
       bcryptjs:
         specifier: ^2.4.3
         version: 2.4.3