/* ========================================
   MODERN DARK THEME - Puzzle Hub
   ======================================== */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600;700&family=Outfit:wght@300;400;500;600;700;800&display=swap');

:root {
    /* Dark Theme Colors */
    --bg-deep: #0a0a0f;
    --bg-primary: #12121a;
    --bg-secondary: #1a1a24;
    --bg-tertiary: #22222e;
    --bg-card: #16161f;

    /* Accent Colors */
    --accent-white: #e4e4e7;
    --accent-silver: #a1a1aa;
    --accent-purple: #a855f7;
    --accent-green: #22c55e;
    --accent-orange: #f97316;
    --accent-pink: #ec4899;
    --accent-red: #ef4444;
    --accent-yellow: #eab308;

    /* Wordle Colors - Original Wordle tones */
    --wordle-correct: #6aaa64;
    --wordle-present: #c9b458;
    --wordle-absent: #787c7e;

    /* Text Colors */
    --text-primary: #f4f4f5;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;

    /* Border & Effects */
    --border-color: #27272a;
    --border-glow: rgba(228, 228, 231, 0.2);
    --glow-white: 0 0 20px rgba(228, 228, 231, 0.25), 0 0 40px rgba(228, 228, 231, 0.1);
    --glow-purple: 0 0 20px rgba(168, 85, 247, 0.4);
    --glow-green: 0 0 20px rgba(34, 197, 94, 0.4);

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.6);

    /* Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* Transitions */
    --transition-fast: all 0.15s ease;
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Skip link for keyboard accessibility */
.skip-link {
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent-white);
    color: var(--bg-deep);
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    z-index: 9999;
    transition: top 0.3s ease;
}

.skip-link:focus {
    top: 16px;
    outline: 2px solid var(--accent-white);
    outline-offset: 2px;
}

/* Hidden mobile input for triggering system keyboard */
.mobile-input {
    position: absolute;
    left: -9999px;
    top: 0;
    width: 1px;
    height: 1px;
    opacity: 0;
    pointer-events: none;
    z-index: -1;
}

body {
    font-family: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-deep);
    min-height: 100vh;
    min-height: 100dvh;
    /* Dynamic viewport height for mobile */
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    position: relative;
    overflow-x: hidden;
    overflow-y: auto;
}

/* Animated Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse 80% 50% at 20% -20%, rgba(255, 255, 255, 0.08), transparent),
        radial-gradient(ellipse 60% 40% at 80% 100%, rgba(168, 85, 247, 0.1), transparent),
        radial-gradient(ellipse 40% 30% at 50% 50%, rgba(255, 255, 255, 0.03), transparent);
    pointer-events: none;
    z-index: 0;
}

/* Grid Pattern Overlay */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: 0;
}

.container {
    max-width: 1400px;
    width: 100%;
    min-height: 0;
    max-height: 100%;
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 1;
}

/* ========================================
   HEADER
   ======================================== */
header {
    text-align: center;
    margin-bottom: 16px;
    position: relative;
    flex-shrink: 0;
}

/* Language Selector */
.language-selector {
    position: absolute;
    top: 0;
    right: 0;
    display: flex;
    gap: 6px;
    background: var(--bg-secondary);
    padding: 6px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.lang-btn {
    padding: 6px 14px;
    border: 1px solid transparent;
    background: transparent;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    font-weight: 600;
    transition: var(--transition);
    letter-spacing: 0.1em;
}

.lang-btn:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.lang-btn.active {
    background: var(--accent-white);
    color: var(--bg-deep);
    box-shadow: var(--glow-white);
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 4px;
}

.logo-icon {
    width: 36px;
    height: 36px;
    stroke: var(--accent-white);
    filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.3));
}

header h1 {
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-white) 50%, var(--accent-silver) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 40px rgba(255, 255, 255, 0.1);
}

.subtitle {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 400;
    margin-bottom: 12px;
    letter-spacing: 0.02em;
}

/* Navigation Tabs */
.game-tabs {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 12px;
}

.tab-btn {
    padding: 10px 24px;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-family: 'Outfit', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    letter-spacing: 0.02em;
}

.tab-icon {
    width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.7;
}

.tab-icon svg {
    width: 100%;
    height: 100%;
}

.tab-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--accent-white);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.tab-btn.active {
    background: linear-gradient(135deg, var(--accent-white), var(--accent-silver));
    color: var(--bg-deep);
    border-color: transparent;
    box-shadow: var(--glow-white), var(--shadow-lg);
}

.tab-btn.active .tab-icon {
    opacity: 1;
}

/* ========================================
   GAME CONTAINER
   ======================================== */
.game-container {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 20px;
    align-items: start;
    flex: 1;
    min-height: 0;
    max-height: 100%;
}

/* Controls Panel */
.controls {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 20px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-xl);
    backdrop-filter: blur(10px);
    min-height: 0;
    display: flex;
    flex-direction: column;
}

/* Sudoku sidebar - stats section expands */
#sudoku-game .controls .stats {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    padding-top: 20px;
}

#sudoku-game .controls .game-actions {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    margin-bottom: 0;
}

#sudoku-game .controls .btn-action:last-child {
    grid-column: span 2;
}

.difficulty-section h3,
.game-actions h3,
.wordle-info h3 {
    margin-bottom: 12px;
    color: var(--text-primary);
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    display: flex;
    align-items: center;
    gap: 6px;
}

.difficulty-section h3::before,
.wordle-info h3::before {
    content: '';
    width: 3px;
    height: 14px;
    background: var(--accent-white);
    border-radius: 2px;
}

.difficulty-buttons {
    display: flex;
    flex-direction: row;
    gap: 8px;
    margin-bottom: 16px;
}

.btn-difficulty {
    padding: 12px 14px;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: 'Outfit', sans-serif;
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition);
    letter-spacing: 0.02em;
    position: relative;
    overflow: hidden;
    flex: 1;
}

.btn-difficulty::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 3px;
    background: var(--accent-white);
    transform: scaleY(0);
    transition: var(--transition);
}

.btn-difficulty:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--accent-white);
    transform: translateX(6px);
}

.btn-difficulty:hover::before {
    transform: scaleY(1);
}

.btn-difficulty.active {
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.1), transparent);
    color: var(--accent-white);
    border-color: var(--accent-white);
    box-shadow: inset 0 0 20px rgba(255, 255, 255, 0.05);
}

.btn-difficulty.active::before {
    transform: scaleY(1);
}

/* Action Buttons */
.game-actions {
    display: flex;
    flex-direction: row;
    gap: 8px;
    margin-bottom: 16px;
}

.btn-action {
    padding: 12px 16px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: 'Outfit', sans-serif;
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    justify-content: center;
    letter-spacing: 0.02em;
    position: relative;
    overflow: hidden;
    flex: 1;
}

.btn-action svg {
    width: 16px;
    height: 16px;
    stroke-width: 2.5;
}

.btn-action::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), transparent);
    opacity: 0;
    transition: var(--transition);
}

.btn-action:hover::after {
    opacity: 1;
}

.btn-new {
    background: var(--accent-green);
    color: white;
}

.btn-new:hover {
    transform: translateY(-2px);
    box-shadow: var(--glow-green), var(--shadow-md);
}

.btn-check {
    background: var(--accent-white);
    color: var(--bg-deep);
}

.btn-check:hover {
    transform: translateY(-2px);
    box-shadow: var(--glow-white), var(--shadow-md);
}

.btn-hint {
    background: var(--accent-orange);
    color: white;
}

.btn-hint:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(249, 115, 22, 0.4), var(--shadow-md);
}

.btn-solve {
    background: var(--accent-purple);
    color: white;
}

.btn-solve:hover {
    transform: translateY(-2px);
    box-shadow: var(--glow-purple), var(--shadow-md);
}

.btn-clear {
    background: var(--accent-red);
    color: white;
}

.btn-clear:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(239, 68, 68, 0.4), var(--shadow-md);
}

/* Stats Section */
.stats {
    border-top: 1px solid var(--border-color);
    padding-top: 16px;
    margin-top: auto;
    display: flex;
    justify-content: space-between;
    gap: 10px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
    padding: 12px 8px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
}

.stat-label {
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    font-size: 0.65rem;
    letter-spacing: 0.08em;
    margin-bottom: 4px;
}

.stat-value {
    color: var(--accent-white);
    font-family: 'JetBrains Mono', monospace;
    font-weight: 700;
    font-size: 1.3rem;
    text-shadow: 0 0 15px rgba(255, 255, 255, 0.2);
}

/* ========================================
   SUDOKU GRID
   ======================================== */
.sudoku-wrapper {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 20px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 0;
}

.sudoku-grid {
    display: grid;
    grid-template-columns: repeat(9, 1fr);
    gap: 0;
    width: fit-content;
    margin: 0 auto;
    border: 2px solid var(--accent-silver);
    border-radius: var(--radius-sm);
    overflow: hidden;
    box-shadow: var(--glow-white);
}

.cell {
    width: 46px;
    height: 46px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.2rem;
    font-weight: 600;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: var(--transition-fast);
    color: var(--text-primary);
}

/* Best Time Display */
.best-time-section {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    background: var(--bg-card);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.best-time-label {
    font-size: 0.8rem;
    color: var(--accent-white);
    text-transform: uppercase;
    font-weight: 600;
}

.best-time-value {
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--accent-white);
}

/* Pause Button */
.btn-pause {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: 8px;
}

.btn-pause:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.1);
}

.btn-pause svg {
    width: 16px;
    height: 16px;
}

/* Paused Overlay */
.paused-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(4px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    z-index: 10;
    border-radius: var(--radius-lg);
    transition: opacity 0.3s ease;
}

.paused-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.paused-text {
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent-white);
    letter-spacing: 0.1em;
}

.btn-primary {
    background: var(--accent-white);
    color: var(--bg-primary);
    border: none;
    padding: 12px 32px;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    background: white;
}

.btn-primary:active {
    transform: translateY(0);
}

/* Undo/Redo Buttons */
.btn-undo,
.btn-redo {
    color: var(--text-secondary);
}

.btn-undo:hover:not(:disabled),
.btn-redo:hover:not(:disabled) {
    color: var(--accent-white);
    background: rgba(255, 255, 255, 0.1);
}

.btn-action:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    background: transparent !important;
}

.cell:focus {
    outline: none;
}

.cell.fixed {
    background: var(--bg-tertiary);
    color: var(--accent-white);
    cursor: default;
    font-weight: 700;
}

.cell.selected {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-white);
    box-shadow: inset 0 0 20px rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.cell.highlight {
    background: rgba(168, 85, 247, 0.1);
}

.cell.error {
    background: rgba(239, 68, 68, 0.2);
    color: var(--accent-red);
    animation: shake 0.3s ease;
}

.cell.correct {
    background: rgba(34, 197, 94, 0.15);
    color: var(--accent-green);
}

.cell.hint {
    background: rgba(249, 115, 22, 0.15);
    color: var(--accent-orange);
    animation: pulse 0.5s ease;
}

/* 3x3 box borders */
.cell:nth-child(9n+3),
.cell:nth-child(9n+6) {
    border-right: 2px solid var(--accent-silver);
}

.cell:nth-child(n+19):nth-child(-n+27),
.cell:nth-child(n+46):nth-child(-n+54) {
    border-bottom: 2px solid var(--accent-silver);
}

/* Messages */
.message {
    text-align: center;
    margin-top: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    min-height: 24px;
    animation: fadeIn 0.3s ease;
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    letter-spacing: 0.02em;
}

.message.success {
    color: var(--accent-green);
    background: rgba(34, 197, 94, 0.15);
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.message.error {
    color: var(--accent-red);
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.message.info {
    color: var(--accent-white);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.wordle-definition {
    margin-top: 8px;
    padding: 16px;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    font-size: 1.2rem;
    color: var(--text-primary);
    line-height: 1.5;
    text-align: center;
    border: 1px solid var(--accent-silver);
    animation: fadeIn 0.5s ease;
    box-shadow: var(--shadow-md);
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

.wordle-definition strong {
    color: var(--accent-white);
    display: block;
    margin-bottom: 4px;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ========================================
   WORDLE STYLES
   ======================================== */
.wordle-container {
    grid-template-columns: 280px 1fr;
}

/* Wordle sidebar layout */
#wordle-game .controls {
    justify-content: space-between;
}

.wordle-info {
    margin-bottom: 16px;
}

.wordle-info p {
    color: var(--text-secondary);
    font-size: 0.8rem;
    line-height: 1.4;
    margin-bottom: 14px;
}

.color-guide {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.guide-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.guide-box {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 700;
    color: white;
    border-radius: 6px;
    font-size: 0.9rem;
}

.guide-box.correct {
    background: var(--wordle-correct);
    box-shadow: 0 0 15px rgba(34, 197, 94, 0.4);
}

.guide-box.present {
    background: var(--wordle-present);
    box-shadow: 0 0 15px rgba(234, 179, 8, 0.4);
}

.guide-box.absent {
    background: var(--wordle-absent);
}

.wordle-wrapper {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 16px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 0;
}

.wordle-board {
    display: grid;
    grid-template-rows: repeat(6, 1fr);
    gap: 6px;
    margin-bottom: 24px;
}

.wordle-row {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 6px;
    perspective: 1000px;
}

/* Wordle Tiles */
.wordle-tile {
    width: 58px;
    height: 58px;
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.8rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-primary);
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    /* GPU acceleration hints */
    transform-style: preserve-3d;
    will-change: transform, background-color;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    transition: border-color 0.15s ease, background-color 0.25s ease;
}

.wordle-tile.filled {
    border-color: var(--text-muted);
}

.wordle-tile.pop {
    animation: tilePop 0.1s cubic-bezier(0.4, 0, 0.2, 1);
}

.wordle-tile.flip {
    animation: tileFlip 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.wordle-tile.dance {
    animation: tileDance 0.5s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.wordle-tile.correct {
    background: var(--wordle-correct);
    border-color: var(--wordle-correct);
    color: white;
    box-shadow: 0 0 20px rgba(34, 197, 94, 0.3);
}

.wordle-tile.present {
    background: var(--wordle-present);
    border-color: var(--wordle-present);
    color: var(--bg-deep);
    box-shadow: 0 0 20px rgba(234, 179, 8, 0.3);
}

.wordle-tile.absent {
    background: var(--wordle-absent);
    border-color: var(--wordle-absent);
    color: var(--text-primary);
}

.wordle-tile.shake {
    animation: shake 0.5s ease;
}

/* Keyboard */
.keyboard {
    width: 100%;
    max-width: 560px;
    margin-bottom: 12px;
}

.keyboard-row {
    display: flex;
    gap: 4px;
    justify-content: center;
    margin-bottom: 5px;
}

.key {
    flex: 0 1 auto;
    min-width: 36px;
    height: 48px;
    border: none;
    border-radius: var(--radius-sm);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-family: 'Outfit', sans-serif;
    font-size: 0.85rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    text-transform: uppercase;
    transition: var(--transition-fast);
    padding: 0 4px;
    border: 1px solid var(--border-color);
}

.key:hover {
    background: var(--bg-secondary);
    transform: translateY(-2px);
    border-color: var(--accent-white);
}

.key:active {
    transform: translateY(0);
}

.key.wide {
    min-width: 52px;
    font-size: 0.7rem;
    letter-spacing: 0.05em;
}

.key.correct {
    background: var(--wordle-correct);
    border-color: var(--wordle-correct);
    color: white;
}

.key.present {
    background: var(--wordle-present);
    border-color: var(--wordle-present);
    color: var(--bg-deep);
}

.key.absent {
    background: var(--wordle-absent);
    border-color: var(--wordle-absent);
    color: var(--text-primary);
}

/* ========================================
   HARD MODE TOGGLE
   ======================================== */
.hard-mode-toggle {
    margin-bottom: 16px;
    padding: 12px 14px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    user-select: none;
}

.toggle-label input {
    display: none;
}

.toggle-slider {
    width: 40px;
    height: 22px;
    background: var(--bg-tertiary);
    border-radius: 11px;
    position: relative;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.toggle-slider::before {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    background: var(--text-muted);
    border-radius: 50%;
    top: 2px;
    left: 2px;
    transition: var(--transition);
}

.toggle-label input:checked+.toggle-slider {
    background: var(--accent-white);
    border-color: var(--accent-white);
    box-shadow: var(--glow-white);
}

.toggle-label input:checked+.toggle-slider::before {
    transform: translateX(18px);
    background: white;
}

.toggle-text {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.85rem;
}

.hard-mode-hint {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-align: right;
    max-width: 110px;
    line-height: 1.3;
}

/* ========================================
   GUESS DISTRIBUTION
   ======================================== */
.distribution-section {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.distribution-section h4 {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.distribution-chart {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 6px;
}

.distribution-row {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.dist-label {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 700;
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-align: center;
}

.dist-bar-container {
    width: 100%;
    height: 40px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
    display: flex;
    align-items: flex-end;
}

.dist-bar {
    width: 100%;
    background: linear-gradient(180deg, var(--accent-white), var(--accent-silver));
    border-radius: 4px;
    min-height: 0;
    transition: height 0.5s ease;
}

.dist-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-white), var(--accent-silver));
    border-radius: 4px;
    min-width: 0;
    transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.dist-bar.highlight {
    background: var(--wordle-correct);
    box-shadow: 0 0 10px rgba(34, 197, 94, 0.4);
}

.dist-value {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 700;
    font-size: 0.7rem;
    color: var(--text-primary);
    text-align: center;
}

/* ========================================
   FOOTER
   ======================================== */
footer {
    text-align: center;
    padding: 8px;
    flex-shrink: 0;
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.footer-content p {
    color: var(--text-muted);
    font-size: 0.85rem;
    letter-spacing: 0.02em;
}

.footer-credit {
    color: var(--text-muted);
    font-size: 0.8rem;
    opacity: 0.7;
}

/* ========================================
   ANIMATIONS
   ======================================== */
@keyframes shake {

    0%,
    100% {
        transform: translateX(0);
    }

    20% {
        transform: translateX(-8px);
    }

    40% {
        transform: translateX(8px);
    }

    60% {
        transform: translateX(-8px);
    }

    80% {
        transform: translateX(8px);
    }
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes tilePop {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.15);
        border-color: var(--accent-white);
    }

    100% {
        transform: scale(1);
    }
}

@keyframes tileFlip {
    0% {
        transform: rotateX(0deg);
    }

    50% {
        transform: rotateX(-90deg);
    }

    100% {
        transform: rotateX(0deg);
    }
}

@keyframes tileDance {

    0%,
    100% {
        transform: translateY(0);
    }

    20% {
        transform: translateY(-25px);
    }

    40% {
        transform: translateY(0);
    }

    60% {
        transform: translateY(-12px);
    }

    80% {
        transform: translateY(0);
    }
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

/* Large screens - scale up elements */
@media (min-width: 1400px) {
    .container {
        max-width: 1600px;
    }

    .game-container {
        grid-template-columns: 320px 1fr;
        gap: 30px;
    }

    .cell {
        width: 52px;
        height: 52px;
        font-size: 1.4rem;
    }

    .wordle-tile {
        width: 66px;
        height: 66px;
        font-size: 2rem;
    }

    .key {
        min-width: 44px;
        height: 58px;
        font-size: 0.95rem;
    }

    .key.wide {
        min-width: 70px;
    }

    header h1 {
        font-size: 2.6rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .controls {
        padding: 24px;
    }

    .btn-action {
        padding: 14px 18px;
        font-size: 0.9rem;
    }
}

/* Extra large screens */
@media (min-width: 1600px) {
    .container {
        max-width: 1800px;
    }

    .game-container {
        grid-template-columns: 360px 1fr;
        gap: 40px;
    }

    .cell {
        width: 58px;
        height: 58px;
        font-size: 1.5rem;
    }

    .wordle-tile {
        width: 72px;
        height: 72px;
        font-size: 2.2rem;
    }

    .key {
        min-width: 48px;
        height: 62px;
        font-size: 1rem;
    }

    .key.wide {
        min-width: 76px;
    }

    header h1 {
        font-size: 2.8rem;
    }

    .wordle-board {
        gap: 8px;
    }

    .wordle-row {
        gap: 8px;
    }
}

/* Ultra-wide / 4K screens */
@media (min-width: 1920px) {
    .container {
        max-width: 2000px;
    }

    .game-container {
        grid-template-columns: 400px 1fr;
        gap: 50px;
    }

    .cell {
        width: 64px;
        height: 64px;
        font-size: 1.6rem;
    }

    .wordle-tile {
        width: 80px;
        height: 80px;
        font-size: 2.4rem;
    }

    .key {
        min-width: 52px;
        height: 66px;
        font-size: 1.05rem;
    }

    .key.wide {
        min-width: 82px;
    }

    header h1 {
        font-size: 3rem;
    }

    .subtitle {
        font-size: 1.1rem;
    }

    .controls {
        padding: 28px;
    }

    .btn-action {
        padding: 16px 20px;
        font-size: 0.95rem;
    }

    .stat-value {
        font-size: 1.5rem;
    }
}

/* Smaller screens - scale down */
@media (max-width: 1200px) {
    body {
        height: auto;
        min-height: 100vh;
        overflow-y: auto;
        overflow-x: hidden;
        align-items: flex-start;
        padding-top: 24px;
        padding-bottom: 24px;
    }

    .container {
        height: auto;
        min-height: auto;
    }

    .game-container,
    .wordle-container {
        grid-template-columns: 1fr;
        max-width: 700px;
        margin: 0 auto;
        height: auto;
    }

    .controls {
        max-width: 100%;
        height: auto;
    }

    .difficulty-buttons {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .btn-difficulty {
        flex: 1;
        min-width: 120px;
    }
}

@media (max-width: 968px) {
    body {
        padding: 16px 12px;
        padding-bottom: 32px;
    }

    header h1 {
        font-size: 2rem;
    }

    .logo-icon {
        width: 32px;
        height: 32px;
    }

    .subtitle {
        font-size: 0.9rem;
    }

    .game-tabs {
        gap: 8px;
    }

    .tab-btn {
        padding: 12px 20px;
        font-size: 0.9rem;
    }

    .sudoku-wrapper,
    .wordle-wrapper {
        padding: 20px;
    }

    .cell {
        width: 42px;
        height: 42px;
        font-size: 1.1rem;
    }

    .wordle-tile {
        width: 52px;
        height: 52px;
        font-size: 1.6rem;
    }
}

@media (max-width: 640px) {
    body {
        padding: 12px 8px;
        padding-bottom: 40px;
        align-items: flex-start;
    }

    .container {
        min-height: auto;
        height: auto;
    }

    header {
        margin-bottom: 12px;
    }

    .language-selector {
        position: static;
        justify-content: center;
        margin-bottom: 12px;
    }

    header h1 {
        font-size: 1.6rem;
    }

    .logo {
        gap: 8px;
    }

    .logo-icon {
        width: 28px;
        height: 28px;
    }

    .subtitle {
        font-size: 0.8rem;
        margin-bottom: 12px;
    }

    .game-tabs {
        flex-direction: row;
        gap: 6px;
        width: 100%;
        margin-bottom: 12px;
    }

    .tab-btn {
        flex: 1;
        padding: 10px 12px;
        font-size: 0.8rem;
        gap: 6px;
    }

    .tab-icon {
        width: 16px;
        height: 16px;
    }

    .game-container,
    .wordle-container {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .controls {
        padding: 16px;
        order: 2;
    }

    .sudoku-wrapper,
    .wordle-wrapper {
        padding: 12px;
        order: 1;
    }

    .difficulty-buttons {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .btn-difficulty {
        flex: 1;
        padding: 10px 12px;
        font-size: 0.8rem;
        min-width: 80px;
    }

    .btn-action {
        padding: 10px 12px;
        font-size: 0.8rem;
        gap: 8px;
    }

    .btn-action svg {
        width: 14px;
        height: 14px;
    }

    .cell {
        width: 34px;
        height: 34px;
        font-size: 0.95rem;
    }

    .wordle-tile {
        width: 48px;
        height: 48px;
        font-size: 1.4rem;
    }

    .wordle-row {
        gap: 4px;
    }

    .key {
        min-width: 24px;
        height: 42px;
        font-size: 0.7rem;
        padding: 0 2px;
    }

    .key.wide {
        min-width: 38px;
        font-size: 0.55rem;
    }

    .keyboard {
        max-width: 100%;
    }

    .keyboard-row {
        gap: 3px;
    }

    .message {
        font-size: 0.85rem;
        padding: 10px 14px;
    }

    /* Sidebar sections on mobile */
    .stats {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 10px;
    }

    .stat {
        flex: 1;
        min-width: 70px;
    }

    .distribution-section {
        margin-top: 12px;
    }

    .distribution-chart {
        height: 80px;
    }

    .hard-mode-toggle {
        padding: 10px;
        margin-bottom: 12px;
    }

    .color-guide {
        gap: 8px;
    }

    .guide-item {
        font-size: 0.75rem;
    }

    .guide-item span:first-child {
        width: 20px;
        height: 20px;
        font-size: 0.65rem;
    }

    footer {
        margin-top: 20px;
    }

    .footer-content p {
        font-size: 0.75rem;
    }
}

@media (max-width: 380px) {
    header h1 {
        font-size: 1.4rem;
    }

    .subtitle {
        font-size: 0.75rem;
    }

    .tab-btn {
        padding: 8px 10px;
        font-size: 0.75rem;
    }

    .cell {
        width: 30px;
        height: 30px;
        font-size: 0.85rem;
    }

    .wordle-tile {
        width: 42px;
        height: 42px;
        font-size: 1.2rem;
    }

    .wordle-row {
        gap: 3px;
    }

    .key {
        min-width: 20px;
        height: 38px;
        font-size: 0.6rem;
        padding: 0 1px;
    }

    .key.wide {
        min-width: 32px;
        font-size: 0.5rem;
    }

    .keyboard-row {
        gap: 2px;
    }

    .controls {
        padding: 12px;
    }

    .btn-difficulty,
    .btn-action {
        padding: 8px 10px;
        font-size: 0.75rem;
    }
}

/* Cookie Consent */
.cookie-consent {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-card);
    padding: 16px 24px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 24px;
    z-index: 1000;
    width: 90%;
    max-width: 500px;
    animation: slideUp 0.5s ease-out;
}

.cookie-consent.hidden {
    display: none;
}

.cookie-consent p {
    margin: 0;
    color: var(--text-primary);
    font-size: 0.95rem;
    flex: 1;
}

/* ========================================
   ANIMATIONS
   ======================================== */

/* Tile Pop Animation - when letter is typed */
@keyframes tilePop {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.1);
    }

    100% {
        transform: scale(1);
    }
}

/* Tile Flip Animation - smooth 3D flip when revealing */
@keyframes tileFlip {
    0% {
        transform: perspective(400px) rotateX(0deg);
    }

    50% {
        transform: perspective(400px) rotateX(90deg);
    }

    100% {
        transform: perspective(400px) rotateX(0deg);
    }
}

/* Win Dance Animation */
@keyframes tileDance {

    0%,
    100% {
        transform: translateY(0);
    }

    25% {
        transform: translateY(-10px);
    }

    50% {
        transform: translateY(0);
    }

    75% {
        transform: translateY(-5px);
    }
}

/* Shake Animation - for invalid words */
@keyframes shake {

    0%,
    100% {
        transform: translateX(0);
    }

    10%,
    30%,
    50%,
    70%,
    90% {
        transform: translateX(-5px);
    }

    20%,
    40%,
    60%,
    80% {
        transform: translateX(5px);
    }
}

/* Fade In Animation */
@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translate(-50%, 20px);
    }

    to {
        opacity: 1;
        transform: translate(-50%, 0);
    }
}

/* ========================================
   HEIGHT-BASED RESPONSIVE DESIGN
   For monitors with limited vertical space
   ======================================== */

/* Short screens (laptops, smaller monitors) */
@media (max-height: 800px) {
    body {
        padding: 10px;
        align-items: flex-start;
    }

    header {
        margin-bottom: 10px;
    }

    header h1 {
        font-size: 1.8rem;
    }

    .logo-icon {
        width: 28px;
        height: 28px;
    }

    .subtitle {
        font-size: 0.8rem;
        margin-bottom: 8px;
    }

    .game-tabs {
        margin-top: 8px;
    }

    .tab-btn {
        padding: 8px 16px;
        font-size: 0.8rem;
    }

    .wordle-tile {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }

    .wordle-board {
        gap: 5px;
        margin-bottom: 16px;
    }

    .wordle-row {
        gap: 5px;
    }

    .key {
        min-width: 32px;
        height: 42px;
        font-size: 0.8rem;
    }

    .key.wide {
        min-width: 48px;
        font-size: 0.65rem;
    }

    .keyboard {
        margin-bottom: 8px;
    }

    .keyboard-row {
        margin-bottom: 4px;
    }

    .controls {
        padding: 14px;
    }

    .wordle-wrapper {
        padding: 12px;
    }

    .message {
        margin-top: 8px;
        padding: 8px 12px;
        font-size: 0.9rem;
    }

    footer {
        padding: 4px;
    }

    .footer-content p {
        font-size: 0.75rem;
    }
}

/* Very short screens */
@media (max-height: 700px) {
    body {
        padding: 8px;
    }

    header {
        margin-bottom: 8px;
    }

    header h1 {
        font-size: 1.6rem;
    }

    .logo-icon {
        width: 24px;
        height: 24px;
    }

    .subtitle {
        font-size: 0.75rem;
        margin-bottom: 6px;
    }

    .game-tabs {
        margin-top: 6px;
    }

    .tab-btn {
        padding: 6px 14px;
        font-size: 0.75rem;
    }

    .wordle-tile {
        width: 44px;
        height: 44px;
        font-size: 1.3rem;
    }

    .wordle-board {
        gap: 4px;
        margin-bottom: 12px;
    }

    .wordle-row {
        gap: 4px;
    }

    .key {
        min-width: 28px;
        height: 38px;
        font-size: 0.75rem;
    }

    .key.wide {
        min-width: 42px;
        font-size: 0.6rem;
    }

    .keyboard-row {
        gap: 3px;
        margin-bottom: 3px;
    }

    .controls {
        padding: 12px;
    }

    .wordle-wrapper {
        padding: 10px;
    }

    .wordle-info p {
        font-size: 0.7rem;
        margin-bottom: 10px;
    }

    .guide-box {
        width: 26px;
        height: 26px;
        font-size: 0.75rem;
    }

    .guide-item {
        font-size: 0.7rem;
        gap: 8px;
    }

    .game-actions {
        margin-bottom: 10px;
    }

    .btn-action {
        padding: 8px 12px;
        font-size: 0.75rem;
    }

    .hard-mode-toggle {
        padding: 8px 10px;
        margin-bottom: 10px;
    }

    .toggle-text {
        font-size: 0.75rem;
    }

    .stats {
        padding-top: 10px;
        gap: 6px;
    }

    .stat-item {
        padding: 8px 6px;
    }

    .stat-label {
        font-size: 0.55rem;
    }

    .stat-value {
        font-size: 1.1rem;
    }

    .distribution-section {
        margin-top: 10px;
        padding-top: 10px;
    }

    footer {
        padding: 2px;
        margin-top: 4px;
    }
}

/* Extra short screens (netbooks, split screens) */
@media (max-height: 600px) {
    header h1 {
        font-size: 1.4rem;
    }

    .logo {
        gap: 6px;
        margin-bottom: 2px;
    }

    .logo-icon {
        width: 22px;
        height: 22px;
    }

    .subtitle {
        display: none;
    }

    .game-tabs {
        margin-top: 4px;
    }

    .tab-btn {
        padding: 5px 12px;
        font-size: 0.7rem;
    }

    .wordle-tile {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }

    .wordle-board {
        gap: 3px;
        margin-bottom: 10px;
    }

    .wordle-row {
        gap: 3px;
    }

    .key {
        min-width: 26px;
        height: 34px;
        font-size: 0.7rem;
    }

    .key.wide {
        min-width: 38px;
        font-size: 0.55rem;
    }

    .keyboard-row {
        gap: 2px;
        margin-bottom: 2px;
    }

    .wordle-wrapper {
        padding: 8px;
    }

    /* Hide sidebar on very short screens to prioritize game */
    .game-container {
        grid-template-columns: 1fr;
    }

    .controls {
        display: none;
    }

    footer {
        display: none;
    }
}

/* Combined width + height constraints for smaller laptops (not mobile) */
@media (min-width: 641px) and (max-width: 1400px) and (max-height: 800px) {

    .game-container,
    .wordle-container,
    .matchwords-container {
        grid-template-columns: 240px 1fr;
        gap: 16px;
    }

    .wordle-tile {
        width: 48px;
        height: 48px;
        font-size: 1.4rem;
    }

    .key {
        min-width: 30px;
        height: 40px;
    }
}

@media (min-width: 641px) and (max-width: 1200px) and (max-height: 700px) {

    .game-container,
    .wordle-container,
    .matchwords-container {
        grid-template-columns: 1fr;
        max-width: 500px;
    }

    .controls {
        order: 2;
    }

    .wordle-wrapper,
    .sudoku-wrapper,
    .match-wrapper {
        order: 1;
    }
}

/* Mobile Optimizations */
@media (max-width: 600px) {

    /* Cookie Consent Mobile */
    .cookie-consent {
        width: 95%;
        bottom: 10px;
        padding: 16px;
        flex-direction: column;
        text-align: center;
        gap: 12px;
    }

    .cookie-consent p {
        font-size: 0.9rem;
    }

    .cookie-consent .btn-primary {
        width: 100%;
        padding: 10px;
    }

    /* Paused Overlay Mobile */
    .paused-text {
        font-size: 1.5rem;
    }
}

/* ========================================
   MATCH WORDS GAME
   ======================================== */

.matchwords-container {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 20px;
    align-items: start;
}

/* Match Words Info */
.match-info {
    margin-bottom: 16px;
}

.match-info h3 {
    margin-bottom: 12px;
    color: var(--text-primary);
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    display: flex;
    align-items: center;
    gap: 6px;
}

.match-info h3::before {
    content: '';
    width: 3px;
    height: 14px;
    background: var(--accent-orange);
    border-radius: 2px;
}

.match-info p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.5;
}

/* Match Stats Section */
.match-stats-section {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.match-stats-section h4 {
    color: var(--text-muted);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 12px;
}

.match-stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.match-stat {
    background: var(--bg-secondary);
    padding: 12px 8px;
    border-radius: var(--radius-sm);
    text-align: center;
}

.match-stat-value {
    display: block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--accent-white);
    margin-bottom: 4px;
}

.match-stat-label {
    font-size: 0.65rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Match Words Board Wrapper */
.match-wrapper {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 24px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Match Words Board - 6x4 Grid */
.match-board {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 12px;
    width: 100%;
    max-width: 700px;
    perspective: 1000px;
}

/* Match Card */
.match-card {
    aspect-ratio: 1;
    cursor: pointer;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.5s ease;
}

.match-card.flipped {
    transform: rotateY(180deg);
}

.match-card.matched {
    transform: rotateY(180deg);
}

.card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
}

.card-front,
.card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--border-color);
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.card-front {
    background: linear-gradient(145deg, var(--bg-tertiary), var(--bg-secondary));
}

.card-front:hover {
    border-color: var(--accent-orange);
    box-shadow: 0 0 15px rgba(249, 115, 22, 0.3);
}

.card-icon {
    font-size: 2rem;
    color: var(--text-muted);
    font-weight: 700;
}

.card-back {
    background: linear-gradient(145deg, var(--accent-orange), #e65100);
    transform: rotateY(180deg);
    border-color: transparent;
}

.card-word {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    font-weight: 700;
    color: white;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    padding: 4px;
    text-align: center;
    word-break: break-all;
}

/* Matched cards */
.match-card.matched .card-back {
    background: linear-gradient(145deg, var(--accent-green), #15803d);
    border-color: var(--accent-green);
    box-shadow: var(--glow-green);
}

.match-card.matched .card-word {
    color: white;
}

/* Celebrate animation */
.match-card.celebrate {
    animation: cardCelebrate 0.6s ease;
}

@keyframes cardCelebrate {

    0%,
    100% {
        transform: rotateY(180deg) scale(1);
    }

    50% {
        transform: rotateY(180deg) scale(1.1);
    }
}

/* Match card hover effect */
.match-card:not(.flipped):not(.matched):hover {
    transform: translateY(-4px);
}

.match-card:not(.flipped):not(.matched):active {
    transform: scale(0.95);
}

/* ========================================
   MATCH WORDS MOBILE RESPONSIVE
   ======================================== */
@media (max-width: 900px) {
    .matchwords-container {
        grid-template-columns: 1fr;
    }

    .match-board {
        grid-template-columns: repeat(4, 1fr);
        gap: 8px;
    }

    .card-word {
        font-size: 0.7rem;
    }
}

@media (max-width: 600px) {
    .match-wrapper {
        padding: 16px;
    }

    .match-board {
        grid-template-columns: repeat(4, 1fr);
        gap: 6px;
    }

    .card-word {
        font-size: 0.6rem;
        letter-spacing: 0;
    }

    .card-icon {
        font-size: 1.5rem;
    }

    .match-stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .match-stat {
        padding: 8px 4px;
    }

    .match-stat-value {
        font-size: 0.9rem;
    }
}

/* ========================================
   FOOTER STYLES
   ======================================== */
footer {
    margin-top: 24px;
    padding: 16px 0;
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.footer-content p {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    margin-top: 8px;
}

.footer-link:hover {
    color: var(--accent-white);
    background: var(--bg-secondary);
}