/* ===========================
   WordWrap - CSS Styles
   Theme: Ancient Mahjong
   =========================== */

:root {
    /* Color Palette - Modern Clean Theme */
    --background: hsl(0, 0%, 96%);
    --foreground: hsl(0, 0%, 9%);
    --primary: hsl(161, 93%, 30%);
    --primary-foreground: hsl(151, 80%, 95%);
    --secondary: hsl(0, 0%, 32%);
    --secondary-foreground: hsl(0, 0%, 98%);
    --muted: hsl(0, 0%, 63%);
    --muted-foreground: hsl(0, 0%, 9%);
    --border: hsl(0, 0%, 83%);

    /* Game specific colors */
    --tile-ivory: #f5f1e8;
    --tile-border: #d4c5a9;
    --success-green: #26815f;
    --success-glow: #6fa87d;

    /* Fonts */
    --font-display: 'Outfit', sans-serif;
    --font-body: 'DM Sans', sans-serif;
    --font-tile: 'Bitter', serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Shadows */
    --shadow-soft: 0 4px 24px -4px rgba(0, 0, 0, 0.08);
    --shadow-elevated: 0 8px 32px -8px rgba(0, 0, 0, 0.12);

    /* Transitions */
    --transition-fast: 0.2s ease-out;
    --transition-normal: 0.3s ease-out;
}

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

body {
    font-family: var(--font-body);
    background: var(--background);
    color: var(--foreground);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow-x: hidden;
    -webkit-tap-highlight-color: transparent;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===========================
   Screen Management
   =========================== */

.screen {
    display: none;
    width: 100%;
    min-height: 100vh;
    padding: 1.5rem; /* px-6 = 1.5rem */
    position: relative;
}

.screen.active {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.container {
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
}

/* ===========================
   Typography
   =========================== */

.game-title {
    font-family: var(--font-display);
    font-size: 3rem; /* 5xl = 3rem */
    font-weight: 700;
    text-align: center;
    margin-bottom: 0;
    letter-spacing: -0.025em; /* tracking-tight */
    color: var(--foreground);
    animation: fade-in 0.5s ease-out 0.1s backwards;
}

.game-title-small {
    font-size: 1.5rem;
    margin-bottom: 0;
    letter-spacing: -0.025em;
}

.game-title-game {
    font-size: 1.75rem;
    margin-bottom: 0;
}

.game-title-game.game-title-daily {
    font-size: 1.75rem;
    color: var(--primary);
    margin-top: 0.25rem;
    margin-bottom: 0;
    animation: none;
}

.game-title-daily {
    font-size: 2.25rem; /* 4xl = 2.25rem */
    font-weight: 700;
    color: var(--primary);
    margin-top: 0.5rem; /* mt-2 = 0.5rem */
    margin-bottom: 0;
    letter-spacing: -0.025em; /* tracking-tight */
    animation: fade-in 0.5s ease-out 0.15s backwards;
}

.game-header {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.game-subtitle {
    font-size: 1.125rem; /* text-lg = 1.125rem */
    text-align: center;
    color: var(--muted);
    margin-top: 1.5rem; /* mt-6 = 1.5rem */
    margin-bottom: 0;
    animation: fade-in 0.5s ease-out 0.2s backwards;
}

.todays-date {
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    color: var(--primary);
    margin-top: 1.5rem; /* mt-6 = 1.5rem */
    margin-bottom: 2.5rem; /* mt-10 = 2.5rem for buttons */
    letter-spacing: -0.01em;
    animation: fade-in 0.5s ease-out 0.25s backwards;
}

.game-date {
    font-size: 0.875rem;
    font-weight: 500;
    text-align: center;
    color: var(--primary);
    margin-top: var(--spacing-sm);
    letter-spacing: -0.01em;
}

h2 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    text-align: center;
    color: #d1d5db;
}

/* ===========================
   Footer
   =========================== */

.footer {
    position: absolute;
    bottom: 1.5rem; /* bottom-6 = 1.5rem */
    text-align: center;
    font-size: 0.875rem; /* text-sm = 0.875rem */
    color: var(--muted);
    animation: fade-in 0.5s ease-out 0.35s backwards;
}

.footer a {
    color: var(--muted);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer a:hover {
    color: var(--foreground);
}

/* ===========================
   CTA Button Container
   =========================== */

.cta-buttons {
    margin-top: 2.5rem; /* mt-10 = 2.5rem */
    display: flex;
    flex-direction: column;
    gap: 1rem; /* gap-4 = 1rem */
    width: 100%;
    max-width: 28rem; /* max-w-md = 28rem */
}

/* ===========================
   Buttons
   =========================== */

.btn {
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: 0.75rem;
    cursor: pointer;
    transition: all 0.2s ease-out;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-elevated);
}

.btn:active {
    transform: translateY(0) scale(0.98);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn:disabled:hover {
    transform: none;
    box-shadow: none;
}

.btn-primary {
    background: var(--primary);
    color: var(--primary-foreground);
    box-shadow: var(--shadow-soft);
    animation: fade-in 0.5s ease-out 0.3s backwards;
}

.btn-primary:hover:not(:disabled) {
    background: hsl(161, 93%, 27%);
}

.btn-secondary {
    background: var(--secondary);
    color: var(--secondary-foreground);
    box-shadow: var(--shadow-soft);
    animation: fade-in 0.5s ease-out 0.35s backwards;
}

.btn-secondary:hover:not(:disabled) {
    background: hsl(0, 0%, 28%);
}

.btn-small {
    font-size: 0.875rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 0.5rem;
}

.btn-large {
    font-size: 1.125rem; /* text-lg = 1.125rem */
    padding: 0 2.5rem; /* px-10 = 2.5rem */
    width: 100%;
    margin-bottom: 1rem; /* gap-4 = 1rem */
    border-radius: 0.75rem; /* rounded-xl = 0.75rem */
    height: 3.5rem; /* h-14 = 3.5rem */
}

/* ===========================
   Menu Sections
   =========================== */

.menu-section {
    margin-bottom: var(--spacing-lg);
}

.grid-size-buttons,
.mode-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
}

.grid-size-buttons .btn {
    flex: 1;
    max-width: 150px;
}

.grid-size-buttons .btn:hover:not(.selected) {
    background: linear-gradient(135deg, #8b7355 0%, #6a5d51 50%, #8b7355 100%);
    border-color: #9d8569;
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.4);
}

.grid-size-buttons .btn.selected {
    background: linear-gradient(135deg, var(--btn-primary) 0%, #7a5d3d 50%, var(--btn-primary) 100%);
    border-color: #d4a574;
    box-shadow: 0 0 0 3px rgba(180, 137, 94, 0.5);
    transform: scale(1.05);
}

.mode-buttons .btn-mode {
    flex: 1;
    padding: var(--spacing-md);
    background-color: var(--tile-grey);
    text-align: center;
    color: var(--text-white);
    border: 2px solid #5a4d41;
    border-radius: 8px;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.mode-buttons .btn-mode:hover:not(.selected) {
    background: linear-gradient(135deg, #8b7355 0%, #6a5d51 50%, #8b7355 100%);
    border-color: #9d8569;
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.4);
}

.mode-buttons .btn-mode strong {
    color: var(--text-white);
}

.mode-buttons .btn-mode small {
    color: rgba(255, 255, 255, 0.85);
}

.mode-buttons .btn-mode.selected {
    background: linear-gradient(135deg, var(--btn-primary) 0%, #7a5d3d 50%, var(--btn-primary) 100%);
    border-color: #d4a574;
    box-shadow: 0 0 0 3px rgba(180, 137, 94, 0.5);
    transform: scale(1.05);
}

.lock-icon {
    margin-left: var(--spacing-xs);
}

/* ===========================
   HUD (Heads-Up Display)
   =========================== */

.hud {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-sm);
    background-color: rgba(55, 65, 81, 0.5);
    border-radius: 8px;
}

.stats {
    display: flex;
    gap: var(--spacing-md);
}

.stat {
    font-size: 1rem;
    font-weight: 700;
}

.stat span {
    color: var(--btn-primary);
}

/* ===========================
   Progress Helper (Word Chips)
   =========================== */

.progress-helper {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    justify-content: center;
    margin-bottom: var(--spacing-md);
    min-height: 40px;
    padding: var(--spacing-xs);
}

.word-chip {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: all var(--transition-fast);
    animation: chipAppear var(--transition-normal);
}

.word-chip.found {
    background-color: var(--partial-orange);
    color: var(--bg-charcoal);
}

.word-chip.solved {
    background-color: var(--success-green);
    color: var(--text-white);
}

.word-chip.unsolved {
    background-color: rgba(156, 163, 175, 0.3);
    color: rgba(255, 255, 255, 0.6);
    border: 1px solid rgba(156, 163, 175, 0.4);
}

@keyframes chipAppear {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Win Message in Progress Helper Area */
.progress-helper.win-message {
    flex-direction: column;
    align-items: center;
    background: linear-gradient(135deg, var(--btn-primary) 0%, var(--btn-hover) 100%);
    border-radius: 12px;
    padding: var(--spacing-md);
    min-height: auto;
    animation: slideDown var(--transition-normal);
}

.win-title {
    font-size: 2rem;
    margin: 0 0 var(--spacing-md) 0;
    color: var(--text-white);
}

.win-buttons {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    justify-content: center;
}

.win-buttons .btn {
    font-size: 0.875rem;
    padding: var(--spacing-xs) var(--spacing-md);
}

.win-name-input {
    width: 100%;
    margin-bottom: var(--spacing-md);
}

.win-name-input input {
    width: 100%;
    max-width: 300px;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 1rem;
    font-family: 'Roboto Mono', monospace;
    text-align: center;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-white);
    transition: all var(--transition-fast);
}

.win-name-input input:focus {
    outline: none;
    border-color: var(--text-white);
    background: rgba(255, 255, 255, 0.2);
}

.win-name-input input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

/* ===========================
   Leaderboard Screen
   =========================== */

.leaderboard-list {
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
    max-height: 60vh;
    overflow-y: auto;
    padding: var(--spacing-sm);
}

.leaderboard-entry {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    background: linear-gradient(135deg, rgba(55, 65, 81, 0.6) 0%, rgba(31, 41, 55, 0.6) 100%);
    border-radius: 8px;
    transition: all var(--transition-fast);
}

.leaderboard-entry:hover {
    background: linear-gradient(135deg, rgba(55, 65, 81, 0.8) 0%, rgba(31, 41, 55, 0.8) 100%);
    transform: translateX(4px);
}

.lb-rank {
    font-size: 1.25rem;
    font-weight: 700;
    min-width: 50px;
    text-align: center;
}

.lb-player {
    flex: 1;
    font-weight: 700;
    font-size: 1rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.lb-stats {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
    flex-wrap: wrap;
    font-size: 0.875rem;
}

.lb-badge {
    background-color: var(--btn-primary);
    padding: 2px var(--spacing-xs);
    border-radius: 4px;
    font-size: 0.75rem;
    text-transform: uppercase;
}

.lb-moves, .lb-time {
    color: rgba(255, 255, 255, 0.8);
}

.empty-leaderboard {
    text-align: center;
    padding: var(--spacing-xl);
    color: rgba(255, 255, 255, 0.6);
    font-size: 1.125rem;
}

/* ===========================
   Shared Result Screen
   =========================== */

.shared-result-content {
    max-width: 500px;
    margin: 0 auto var(--spacing-lg);
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, rgba(55, 65, 81, 0.6) 0%, rgba(31, 41, 55, 0.6) 100%);
    border-radius: 12px;
}

.shared-result-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.result-player {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.result-badge {
    display: inline-block;
    background-color: var(--btn-primary);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 8px;
    font-size: 0.875rem;
    text-transform: uppercase;
}

.shared-result-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 2px solid rgba(255, 255, 255, 0.2);
}

.result-stat {
    font-size: 1.125rem;
    font-weight: 700;
}

.shared-result-words {
    text-align: center;
}

.shared-result-words h3 {
    margin-bottom: var(--spacing-md);
    color: var(--text-white);
}

.words-display {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    justify-content: center;
}

.shared-result-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ===========================
   Game Grid
   =========================== */

.game-grid {
    display: grid;
    gap: 6px;
    max-width: 500px;
    margin: 0 auto var(--spacing-lg);
    padding: var(--spacing-md);
    background: linear-gradient(135deg, #3d2817 0%, #2d1f15 50%, #3d2817 100%);
    border-radius: 12px;
    border: 4px solid #4a3422;
    box-shadow:
        0 8px 24px rgba(0, 0, 0, 0.6),
        inset 0 2px 4px rgba(0, 0, 0, 0.3);
    touch-action: none;
    user-select: none;
}

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

.game-grid.size-5 {
    grid-template-columns: repeat(5, 1fr);
}

.tile {
    aspect-ratio: 1;
    /* Aged ivory color with subtle warmth */
    background:
        /* Noise texture overlay */
        url('data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 200"%3E%3Cfilter id="noise"%3E%3CfeTurbulence type="fractalNoise" baseFrequency="0.9" numOctaves="4" /%3E%3CfeColorMatrix values="0 0 0 0 0, 0 0 0 0 0, 0 0 0 0 0, 0 0 0 0.03 0"/%3E%3C/filter%3E%3Crect width="200" height="200" filter="url(%23noise)"/%3E%3C/svg%3E'),
        linear-gradient(135deg, #ebe5d9 0%, #e8dfd0 30%, #f0e9dd 70%, #ebe5d9 100%);
    color: #000000;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-tile);
    font-size: 2.2rem;
    font-weight: 800;
    /* Slightly irregular rounded corners for worn look */
    border-radius: 3px;
    transition: all var(--transition-fast);
    cursor: grab;
    position: relative;

    /* Aged ivory tile effect */
    border: 2px solid #d4c5a9;
    box-shadow:
        /* Deep shadow for raised tile */
        0 6px 12px rgba(0, 0, 0, 0.4),
        /* Subtle inner highlight */
        inset 0 1px 0 rgba(255, 255, 255, 0.5),
        /* Inner shadow for depth */
        inset 0 0 20px rgba(139, 119, 87, 0.08),
        /* Edge wear */
        inset 2px 2px 3px rgba(0, 0, 0, 0.05);

    /* Slight irregularity in the surface */
    filter: contrast(1.02) brightness(1.01);
}

.tile:active {
    cursor: grabbing;
    transform: translateY(2px);
    box-shadow:
        0 2px 4px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

/* Grid Row/Column States */
.tile.correct {
    /* Stronger green shade for found words */
    background:
        url('data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 200"%3E%3Cfilter id="noise"%3E%3CfeTurbulence type="fractalNoise" baseFrequency="0.9" numOctaves="4" /%3E%3CfeColorMatrix values="0 0 0 0 0, 0 0 0 0 0, 0 0 0 0 0, 0 0 0 0.03 0"/%3E%3C/filter%3E%3Crect width="200" height="200" filter="url(%23noise)"/%3E%3C/svg%3E'),
        linear-gradient(135deg, #c5e3cd 0%, #b8d9c2 30%, #d0ead8 70%, #c5e3cd 100%);
    color: #1a4d2e;
    border-color: #7fae8e;
    box-shadow:
        0 6px 16px rgba(74, 124, 89, 0.5),
        inset 0 1px 0 rgba(255, 255, 255, 0.7),
        inset 0 0 30px rgba(74, 124, 89, 0.15),
        0 0 25px rgba(111, 168, 125, 0.4);
    animation: pulse 0.3s ease-out;
    opacity: 0.85;
}

.tile.partial {
    background:
        url('data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 200"%3E%3Cfilter id="noise"%3E%3CfeTurbulence type="fractalNoise" baseFrequency="0.9" numOctaves="4" /%3E%3CfeColorMatrix values="0 0 0 0 0, 0 0 0 0 0, 0 0 0 0 0, 0 0 0 0.03 0"/%3E%3C/filter%3E%3Crect width="200" height="200" filter="url(%23noise)"/%3E%3C/svg%3E'),
        linear-gradient(135deg, #f5e5d0 0%, #f0dcc4 30%, #f8ebda 70%, #f5e5d0 100%);
    color: #000000;
    border-color: #d9b894;
    box-shadow:
        0 6px 12px rgba(198, 125, 62, 0.35),
        inset 0 1px 0 rgba(255, 255, 255, 0.5),
        inset 0 0 20px rgba(198, 125, 62, 0.1);
}

/* Pulse Animation */
@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* ===========================
   Instructions
   =========================== */

.instructions {
    text-align: center;
    font-size: 0.875rem;
    color: #9ca3af;
    line-height: 1.6;
}

.instructions p {
    margin-bottom: var(--spacing-xs);
}

/* ===========================
   Win Screen
   =========================== */

.win-stats {
    text-align: center;
    font-size: 1.5rem;
    margin: var(--spacing-lg) 0;
}

.win-stats p {
    margin-bottom: var(--spacing-sm);
}

.win-stats span {
    color: var(--success-green);
    font-weight: 700;
}

/* ===========================
   How to Play Button
   =========================== */

.btn-help {
    position: fixed;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    background: hsl(0, 0%, 98%);
    color: var(--foreground);
    border: none;
    font-size: 1.25rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: var(--shadow-soft);
    transition: all 0.2s ease-out;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fade-in 0.5s ease-out 0.4s backwards;
}

.btn-help:hover {
    background: hsl(166, 76%, 96%);
    box-shadow: var(--shadow-elevated);
    transform: scale(0.95);
}

/* ===========================
   Modal (How to Play)
   =========================== */

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    z-index: 2000;
    overflow-y: auto;
    animation: fadeIn var(--transition-normal);
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.modal-content {
    background-color: var(--bg-charcoal);
    border: 2px solid var(--tile-grey);
    border-radius: 12px;
    padding: var(--spacing-xl);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    animation: slideDown var(--transition-normal);
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: none;
    border: none;
    color: var(--text-white);
    font-size: 2rem;
    cursor: pointer;
    line-height: 1;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    color: var(--btn-primary);
    transform: rotate(90deg);
}

.modal-content h2 {
    margin-bottom: var(--spacing-lg);
    color: var(--btn-primary);
    font-size: 2rem;
}

.modal-content h3 {
    color: var(--text-white);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.instructions-section {
    margin-bottom: var(--spacing-lg);
}

.instructions-section p {
    line-height: 1.6;
    color: #d1d5db;
    margin-bottom: var(--spacing-sm);
}

.instructions-section ul {
    list-style: none;
    padding-left: 0;
    margin-bottom: 0;
}

.instructions-section ul li {
    line-height: 1.8;
    color: #d1d5db;
    padding-left: var(--spacing-md);
    position: relative;
}

.instructions-section ul li::before {
    content: "▸";
    position: absolute;
    left: 0;
    color: var(--btn-primary);
}

.color-indicator {
    font-weight: 700;
}

.color-indicator.green {
    color: var(--success-green);
}

.color-indicator.orange {
    color: var(--partial-orange);
}

.color-indicator.gray {
    color: var(--tile-grey);
}

#gotItBtn {
    margin-top: var(--spacing-md);
}

/* ===========================
   Responsive Design
   =========================== */

@media (max-width: 640px) {
    .game-title {
        font-size: 2rem;
    }

    .btn-help {
        top: auto;
        bottom: var(--spacing-md);
        width: 45px;
        height: 45px;
        font-size: 1.25rem;
    }

    .tile {
        font-size: 1.5rem;
    }

    .hud {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .stats {
        order: -1;
    }
}

@media (max-width: 400px) {
    .tile {
        font-size: 1.25rem;
    }

    .mode-buttons {
        flex-direction: column;
    }
}

/* ===========================
   Animations & Transitions
   =========================== */

.tile-sliding {
    transition: transform var(--transition-fast);
}

/* Fade animations */
@keyframes fade-in {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.screen {
    animation: fadeIn var(--transition-normal);
}