/* ========================================
   NOVA AI GAMES - Main Stylesheet
   ======================================== */

/* CSS Variables - Dark Theme */
:root {
    /* Colors */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    --bg-card: rgba(30, 30, 45, 0.8);
    --bg-glass: rgba(255, 255, 255, 0.05);

    /* Accent Colors */
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-gradient: linear-gradient(135deg, #6366f1, #8b5cf6, #a855f7);
    --accent-glow: rgba(99, 102, 241, 0.4);

    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.4);

    /* Status Colors */
    --success: #22c55e;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;

    /* Difficulty Colors */
    --easy: #22c55e;
    --medium: #f59e0b;
    --hard: #ef4444;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 50%;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px var(--accent-glow);

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Safe Areas */
    --safe-top: env(safe-area-inset-top, 0px);
    --safe-bottom: env(safe-area-inset-bottom, 0px);
}

/* ========================================
   Reset & Base Styles
   ======================================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.5;
}

#app {
    min-height: 100vh;
    position: relative;
}

/* ========================================
   Screen Management
   ======================================== */
.screen {
    display: none;
    min-height: 100vh;
    flex-direction: column;
    padding-bottom: 80px;
    animation: fadeIn 0.3s ease;
}

.screen.active {
    display: flex;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

/* ========================================
   Loading Screen
   ======================================== */
#loading-screen {
    justify-content: center;
    align-items: center;
    background: radial-gradient(ellipse at center, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.loader-container {
    text-align: center;
}

.brain-icon {
    font-size: 64px;
    animation: pulse 2s ease infinite;
}

.loader-ring {
    width: 100px;
    height: 100px;
    border: 3px solid var(--bg-tertiary);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    margin: 20px auto;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

@keyframes pulse {

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

    50% {
        transform: scale(1.1);
    }
}

.loader-container h2 {
    font-size: 24px;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.loader-container p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* ========================================
   Glass Card Effect
   ======================================== */
.glass-card {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

/* ========================================
   App Header
   ======================================== */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    padding-top: calc(var(--spacing-lg) + var(--safe-top));
    background: linear-gradient(to bottom, var(--bg-secondary), transparent);
}

.app-header.simple {
    justify-content: center;
}

.app-header.simple h1 {
    font-size: 20px;
    font-weight: 700;
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.avatar {
    width: 48px;
    height: 48px;
    background: var(--accent-gradient);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: var(--shadow-glow);
}

.user-details {
    display: flex;
    flex-direction: column;
}

.user-name {
    font-weight: 600;
    font-size: 16px;
}

.user-level {
    font-size: 12px;
    color: var(--text-secondary);
}

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

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--bg-glass);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
}

.stat-icon {
    font-size: 16px;
}

.stat-value {
    font-weight: 600;
    font-size: 14px;
}

/* ========================================
   Home Content
   ======================================== */
.home-content {
    padding: 0 var(--spacing-lg);
    flex: 1;
}

/* Daily Challenge */
.daily-challenge {
    margin-bottom: var(--spacing-xl);
}

.challenge-card {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(139, 92, 246, 0.1));
    border-color: rgba(99, 102, 241, 0.3);
    position: relative;
    overflow: hidden;
}

.challenge-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.2) 0%, transparent 70%);
    animation: shimmer 3s ease infinite;
}

@keyframes shimmer {

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

    50% {
        transform: translate(-20%, 20%);
    }
}

.challenge-badge {
    display: inline-block;
    background: var(--accent-gradient);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 12px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.challenge-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.challenge-progress {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.progress-bar {
    flex: 1;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: var(--radius-full);
    transition: width var(--transition-normal);
}

.challenge-progress span {
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap;
}

/* Games Section */
.games-section h2 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.games-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.game-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.05);
    position: relative;
    overflow: hidden;
}

.game-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--accent-gradient);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.game-card:hover::before,
.game-card:active::before {
    opacity: 0.1;
}

.game-card:active {
    transform: scale(0.98);
}

.game-icon {
    width: 56px;
    height: 56px;
    background: var(--bg-glass);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    flex-shrink: 0;
}

.game-card h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.game-card p {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.game-meta {
    display: flex;
    gap: var(--spacing-sm);
}

.difficulty {
    font-size: 11px;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-weight: 500;
}

.difficulty.easy {
    background: rgba(34, 197, 94, 0.2);
    color: var(--easy);
}

.difficulty.medium {
    background: rgba(245, 158, 11, 0.2);
    color: var(--medium);
}

.difficulty.hard {
    background: rgba(239, 68, 68, 0.2);
    color: var(--hard);
}

.duration {
    font-size: 11px;
    color: var(--text-muted);
}

/* ========================================
   Bottom Navigation
   ======================================== */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-around;
    background: rgba(18, 18, 26, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: var(--spacing-sm);
    padding-bottom: calc(var(--spacing-sm) + var(--safe-bottom));
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    z-index: 100;
}

.nav-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
    border-radius: var(--radius-md);
}

.nav-btn.active {
    color: var(--accent-primary);
}

.nav-btn:active {
    transform: scale(0.95);
}

.nav-icon {
    font-size: 22px;
}

.nav-label {
    font-size: 11px;
    font-weight: 500;
}

/* ========================================
   Game Screen
   ======================================== */
.game-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    padding-top: calc(var(--spacing-lg) + var(--safe-top));
    background: var(--bg-secondary);
}

.back-btn {
    width: 40px;
    height: 40px;
    background: var(--bg-glass);
    border: none;
    border-radius: var(--radius-full);
    color: var(--text-primary);
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.back-btn:active {
    transform: scale(0.9);
}

.game-info h2 {
    font-size: 18px;
    font-weight: 600;
}

.game-timer {
    font-size: 18px;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.game-container {
    flex: 1;
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.game-score-bar {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
}

.score-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.score-label {
    font-size: 12px;
    color: var(--text-secondary);
}

.score-value {
    font-size: 24px;
    font-weight: 700;
}

/* ========================================
   Result Screen
   ======================================== */
#result-screen {
    justify-content: center;
    align-items: center;
    background: radial-gradient(ellipse at center, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    padding: var(--spacing-xl);
}

.result-container {
    text-align: center;
    max-width: 320px;
    width: 100%;
}

.result-icon {
    font-size: 80px;
    margin-bottom: var(--spacing-md);
    animation: bounceIn 0.6s ease;
}

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

    50% {
        transform: scale(1.2);
    }

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

#result-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
}

.result-score {
    background: var(--bg-glass);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.result-label {
    display: block;
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.result-value {
    font-size: 48px;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.result-stats {
    display: flex;
    justify-content: space-around;
    margin-bottom: var(--spacing-xl);
}

.result-stat {
    text-align: center;
}

.result-stat .stat-label {
    display: block;
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.result-stat .stat-value {
    font-size: 18px;
    font-weight: 600;
}

.result-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* Buttons */
.btn {
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: var(--shadow-glow);
}

.btn-secondary {
    background: var(--bg-glass);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* ========================================
   Stats Screen
   ======================================== */
.stats-content {
    padding: var(--spacing-lg);
    padding-top: 0;
}

.stats-overview {
    display: flex;
    justify-content: space-around;
    margin-bottom: var(--spacing-lg);
}

.overview-stat {
    text-align: center;
}

.overview-value {
    display: block;
    font-size: 28px;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.overview-label {
    font-size: 12px;
    color: var(--text-secondary);
}

.stats-chart {
    margin-bottom: var(--spacing-lg);
}

.stats-chart h3 {
    font-size: 16px;
    margin-bottom: var(--spacing-md);
}

.chart-bars {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    height: 120px;
    padding-top: var(--spacing-md);
}

.chart-bar {
    flex: 1;
    margin: 0 4px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    height: var(--height);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    align-items: center;
    position: relative;
    transition: all var(--transition-normal);
}

.chart-bar::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--accent-gradient);
    opacity: 0.6;
    border-radius: inherit;
}

.chart-bar.today::before {
    opacity: 1;
}

.chart-bar span {
    position: absolute;
    bottom: -24px;
    font-size: 11px;
    color: var(--text-muted);
}

.game-stats h3 {
    font-size: 16px;
    margin-bottom: var(--spacing-md);
}

.game-stat-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    padding: var(--spacing-md);
}

.game-stat-icon {
    font-size: 28px;
}

.game-stat-info {
    flex: 1;
}

.game-stat-info h4 {
    font-size: 14px;
    font-weight: 600;
}

.game-stat-info p {
    font-size: 12px;
    color: var(--text-secondary);
}

.game-stat-level {
    font-size: 14px;
    font-weight: 600;
    color: var(--accent-primary);
}

/* ========================================
   Leaderboard Screen
   ======================================== */
.leaderboard-content {
    padding: var(--spacing-lg);
    padding-top: 0;
}

.leaderboard-tabs {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.tab-btn {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-glass);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tab-btn.active {
    background: var(--accent-gradient);
    color: white;
    border-color: transparent;
}

.top-players {
    display: flex;
    justify-content: center;
    align-items: flex-end;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg) 0;
}

.top-player {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.top-player .player-avatar {
    width: 56px;
    height: 56px;
    background: var(--bg-glass);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: var(--spacing-sm);
}

.top-player.first .player-avatar {
    width: 72px;
    height: 72px;
    font-size: 36px;
    background: linear-gradient(135deg, #ffd700, #ffb700);
    box-shadow: 0 0 30px rgba(255, 215, 0, 0.4);
}

.top-player.second .player-avatar {
    background: linear-gradient(135deg, #c0c0c0, #a0a0a0);
}

.top-player.third .player-avatar {
    background: linear-gradient(135deg, #cd7f32, #b06c2a);
}

.top-player .player-name {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
}

.top-player .player-score {
    font-size: 12px;
    color: var(--text-secondary);
}

.leaderboard-list {
    background: var(--bg-glass);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.leaderboard-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.leaderboard-item:last-child {
    border-bottom: none;
}

.leaderboard-item.you {
    background: rgba(99, 102, 241, 0.1);
}

.leaderboard-item .rank {
    width: 32px;
    font-weight: 600;
    color: var(--text-muted);
}

.leaderboard-item .player-name {
    flex: 1;
    font-weight: 500;
}

.leaderboard-item .player-score {
    font-weight: 600;
    color: var(--accent-primary);
}

/* ========================================
   Profile Screen
   ======================================== */
.profile-content {
    padding: var(--spacing-lg);
    padding-top: 0;
}

.profile-card {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.profile-avatar {
    width: 80px;
    height: 80px;
    background: var(--accent-gradient);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
    margin: 0 auto var(--spacing-md);
    box-shadow: var(--shadow-glow);
}

.profile-card h2 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 4px;
}

.profile-joined {
    font-size: 14px;
    color: var(--text-secondary);
}

.achievements-section {
    margin-bottom: var(--spacing-xl);
}

.achievements-section h3 {
    font-size: 16px;
    margin-bottom: var(--spacing-md);
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.achievement {
    background: var(--bg-glass);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    text-align: center;
    transition: all var(--transition-fast);
}

.achievement.locked {
    opacity: 0.4;
}

.achievement-icon {
    font-size: 28px;
    display: block;
    margin-bottom: var(--spacing-xs);
}

.achievement-name {
    font-size: 12px;
    color: var(--text-secondary);
}

.settings-section h3 {
    font-size: 16px;
    margin-bottom: var(--spacing-md);
}

.settings-list {
    background: var(--bg-glass);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.setting-item:last-child {
    border-bottom: none;
}

.setting-item span {
    font-size: 14px;
}

/* Toggle Switch */
.toggle {
    position: relative;
    width: 48px;
    height: 28px;
}

.toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    inset: 0;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.toggle-slider::before {
    content: '';
    position: absolute;
    width: 22px;
    height: 22px;
    left: 3px;
    top: 3px;
    background: white;
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.toggle input:checked+.toggle-slider {
    background: var(--accent-gradient);
}

.toggle input:checked+.toggle-slider::before {
    transform: translateX(20px);
}

/* ========================================
   Memory Game Styles - Enhanced 3D
   ======================================== */
.memory-game-wrapper {
    width: 100%;
    max-width: 340px;
    position: relative;
}

.memory-grid-enhanced {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    perspective: 1000px;
}

.memory-card-3d {
    aspect-ratio: 1;
    cursor: pointer;
    position: relative;
    transform-style: preserve-3d;
    animation: cardEntrance 0.5s ease backwards;
}

@keyframes cardEntrance {
    from {
        opacity: 0;
        transform: scale(0.5) rotateY(180deg);
    }

    to {
        opacity: 1;
        transform: scale(1) rotateY(0);
    }
}

.memory-card-3d .card-inner {
    position: absolute;
    inset: 0;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    transform-style: preserve-3d;
}

.memory-card-3d.flipped .card-inner {
    transform: rotateY(180deg);
}

.memory-card-3d .card-face {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    backface-visibility: hidden;
    border-radius: var(--radius-md);
    font-size: 28px;
}

.memory-card-3d .card-front-3d {
    background: linear-gradient(145deg, #1e1e2e, #2a2a40);
    border: 2px solid rgba(99, 102, 241, 0.3);
    box-shadow:
        0 4px 15px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    overflow: hidden;
}

.memory-card-3d .card-pattern {
    position: absolute;
    inset: 0;
    background:
        repeating-linear-gradient(45deg,
            transparent,
            transparent 5px,
            rgba(99, 102, 241, 0.05) 5px,
            rgba(99, 102, 241, 0.05) 10px);
}

.memory-card-3d .card-question {
    position: relative;
    z-index: 1;
    font-size: 32px;
    color: var(--text-muted);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.memory-card-3d .card-back-3d {
    background: linear-gradient(135deg, #6366f1, #8b5cf6, #a855f7);
    transform: rotateY(180deg);
    box-shadow:
        0 8px 25px rgba(99, 102, 241, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.memory-card-3d .card-emoji {
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
    animation: emojiPop 0.3s ease;
}

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

    50% {
        transform: scale(1.2);
    }

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

.memory-card-3d:hover:not(.flipped):not(.matched) {
    transform: translateY(-3px);
}

.memory-card-3d:hover:not(.flipped):not(.matched) .card-front-3d {
    border-color: rgba(99, 102, 241, 0.6);
    box-shadow:
        0 8px 25px rgba(99, 102, 241, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.memory-card-3d.matched .card-inner {
    animation: matchCelebrate 0.5s ease;
}

@keyframes matchCelebrate {

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

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

.memory-card-3d.matched .card-back-3d {
    background: linear-gradient(135deg, #22c55e, #16a34a);
    box-shadow:
        0 8px 30px rgba(34, 197, 94, 0.5),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.memory-moves {
    text-align: center;
    margin-top: var(--spacing-lg);
    font-size: 14px;
    color: var(--text-secondary);
}

.moves-value {
    font-weight: 700;
    color: var(--accent-primary);
    margin-left: 4px;
}

/* Particle Effects */
.particles-container {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.particle {
    position: absolute;
    border-radius: 50%;
    animation: particleFloat 0.8s ease-out forwards;
}

@keyframes particleFloat {
    0% {
        opacity: 1;
        transform: translate(0, 0) scale(1);
    }

    100% {
        opacity: 0;
        transform: translate(var(--tx), var(--ty)) scale(0);
    }
}

/* ========================================
   Pattern Game Styles
   ======================================== */
.pattern-display {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    max-width: 280px;
    width: 100%;
    margin-bottom: var(--spacing-xl);
}

.pattern-cell {
    aspect-ratio: 1;
    background: var(--bg-glass);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.pattern-cell.active {
    background: var(--accent-gradient);
    box-shadow: var(--shadow-glow);
    transform: scale(1.05);
}

.pattern-cell.correct {
    background: var(--success);
}

.pattern-cell.wrong {
    background: var(--error);
    animation: shake 0.5s ease;
}

@keyframes shake {

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

    25% {
        transform: translateX(-8px);
    }

    75% {
        transform: translateX(8px);
    }
}

.pattern-instruction {
    text-align: center;
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    min-height: 50px;
}

.pattern-level {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ========================================
   Math Game Styles
   ======================================== */
.math-container {
    text-align: center;
    max-width: 320px;
    width: 100%;
}

.math-problem {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: var(--spacing-xl);
    min-height: 60px;
}

.math-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.math-option {
    padding: var(--spacing-lg);
    background: var(--bg-glass);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.math-option:active {
    transform: scale(0.95);
}

.math-option.correct {
    background: rgba(34, 197, 94, 0.2);
    border-color: var(--success);
}

.math-option.wrong {
    background: rgba(239, 68, 68, 0.2);
    border-color: var(--error);
}

.math-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.math-stat {
    text-align: center;
}

.math-stat-label {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
}

.math-stat-value {
    font-size: 24px;
    font-weight: 700;
}

/* ========================================
   Word Scramble Game Styles
   ======================================== */
.word-container {
    text-align: center;
    max-width: 340px;
    width: 100%;
}

.word-instruction {
    margin-bottom: var(--spacing-lg);
}

.word-instruction span {
    font-size: 18px;
    font-weight: 600;
}

.word-level {
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: 4px;
}

.word-answer {
    min-height: 60px;
    background: var(--bg-glass);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
    border: 2px solid transparent;
    transition: all var(--transition-fast);
}

.word-answer.correct {
    border-color: var(--success);
    background: rgba(34, 197, 94, 0.1);
}

.word-answer.wrong {
    border-color: var(--error);
    background: rgba(239, 68, 68, 0.1);
}

.answer-letter {
    width: 40px;
    height: 48px;
    background: var(--accent-gradient);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    color: white;
    animation: letterPop 0.2s ease;
}

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

    70% {
        transform: scale(1.1);
    }

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

.answer-placeholder {
    color: var(--text-muted);
    font-size: 14px;
}

.word-scrambled {
    display: flex;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

.word-letter {
    width: 48px;
    height: 56px;
    background: linear-gradient(145deg, #1e1e2e, #2a2a40);
    border: 2px solid rgba(99, 102, 241, 0.4);
    border-radius: var(--radius-md);
    font-size: 26px;
    font-weight: 700;
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.word-letter:hover:not(.used) {
    border-color: var(--accent-primary);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.3);
}

.word-letter:active:not(.used) {
    transform: scale(0.95);
}

.word-letter.used {
    opacity: 0.3;
    cursor: not-allowed;
    transform: scale(0.9);
}

.word-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

.word-btn {
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.word-btn-clear {
    background: var(--bg-glass);
    color: var(--text-primary);
}

.word-btn-submit {
    background: var(--accent-gradient);
    color: white;
}

.word-btn-submit:not(:disabled):hover {
    box-shadow: var(--shadow-glow);
}

.word-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
}

.word-stat {
    text-align: center;
}

.word-stat-label {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
}

.word-stat-value {
    font-size: 24px;
    font-weight: 700;
}

/* ========================================
   Reaction Time Game Styles
   ======================================== */
.reaction-container {
    text-align: center;
    max-width: 340px;
    width: 100%;
}

.reaction-box {
    width: 100%;
    height: 280px;
    background: linear-gradient(145deg, #1e1e2e, #2a2a40);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 3px solid rgba(255, 255, 255, 0.1);
    margin-bottom: var(--spacing-lg);
}

.reaction-container.waiting .reaction-box {
    background: linear-gradient(145deg, #b91c1c, #dc2626);
    border-color: #ef4444;
    animation: waitingPulse 1s infinite;
}

@keyframes waitingPulse {

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

    50% {
        transform: scale(1.02);
    }
}

.reaction-container.ready .reaction-box {
    background: linear-gradient(145deg, #15803d, #22c55e);
    border-color: #22c55e;
    box-shadow: 0 0 40px rgba(34, 197, 94, 0.5);
    animation: readyGlow 0.3s ease;
}

@keyframes readyGlow {
    0% {
        transform: scale(0.95);
    }

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

.reaction-box.early {
    background: linear-gradient(145deg, #c2410c, #ea580c) !important;
    border-color: #f97316 !important;
    animation: shakeBox 0.5s ease;
}

@keyframes shakeBox {

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

    20% {
        transform: translateX(-10px);
    }

    40% {
        transform: translateX(10px);
    }

    60% {
        transform: translateX(-10px);
    }

    80% {
        transform: translateX(10px);
    }
}

.reaction-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.reaction-icon {
    font-size: 64px;
}

.reaction-message {
    font-size: 24px;
    font-weight: 700;
    color: white;
}

.reaction-hint {
    font-size: 14px;
    color: var(--text-secondary);
    max-width: 200px;
}

.reaction-progress {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.reaction-dot {
    width: 50px;
    height: 50px;
    background: var(--bg-glass);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    color: var(--text-muted);
    transition: all var(--transition-fast);
}

.reaction-dot.current {
    border: 2px solid var(--accent-primary);
}

.reaction-dot.completed {
    background: var(--accent-gradient);
    color: white;
    font-weight: 600;
}

.reaction-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
}

.reaction-stat {
    text-align: center;
}

.reaction-stat-label {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
}

.reaction-stat-value {
    font-size: 20px;
    font-weight: 700;
}

/* ========================================
   Countdown Overlay
   ======================================== */
.countdown-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
}

.countdown-number {
    font-size: 120px;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: countPulse 1s ease infinite;
}

@keyframes countPulse {
    0% {
        transform: scale(0.5);
        opacity: 0;
    }

    50% {
        transform: scale(1.2);
        opacity: 1;
    }

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

/* ========================================
   Responsive Adjustments
   ======================================== */
@media (min-width: 768px) {
    .games-grid {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .game-card {
        flex: 1 1 calc(50% - var(--spacing-md));
    }
}

/* ========================================
   AI Indicator Badge
   ======================================== */
.ai-indicator {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.ai-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 600;
    animation: badgePulse 2s ease infinite;
}

.ai-badge:not(.local) {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.3), rgba(168, 85, 247, 0.3));
    border: 1px solid rgba(139, 92, 246, 0.5);
    color: #a78bfa;
    box-shadow: 0 0 20px rgba(139, 92, 246, 0.3);
}

.ai-badge.local {
    background: rgba(100, 116, 139, 0.2);
    border: 1px solid rgba(148, 163, 184, 0.3);
    color: var(--text-secondary);
}

@keyframes badgePulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.7;
    }
}

/* ========================================
   Mode Selection (Play to Learn / Earn)
   ======================================== */
.mode-selection {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    min-height: 100vh;
    justify-content: center;
}

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

.mode-header h1 {
    font-size: 28px;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
}

.mode-header p {
    color: var(--text-secondary);
    font-size: 14px;
}

.mode-card {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.mode-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.mode-card.learn {
    border-color: rgba(34, 197, 94, 0.3);
}

.mode-card.learn:hover {
    border-color: var(--success);
    box-shadow: 0 0 30px rgba(34, 197, 94, 0.2);
}

.mode-card.earn {
    border-color: rgba(245, 158, 11, 0.3);
}

.mode-card.earn:hover {
    border-color: var(--warning);
    box-shadow: 0 0 30px rgba(245, 158, 11, 0.2);
}

.mode-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-md);
}

.mode-card h2 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.mode-card p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.mode-features {
    text-align: left;
    font-size: 13px;
}

.mode-features li {
    padding: 4px 0;
    color: var(--text-secondary);
}

.mode-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-size: 11px;
    font-weight: 600;
}

.mode-card.learn .mode-badge {
    background: rgba(34, 197, 94, 0.2);
    color: var(--success);
}

.mode-card.earn .mode-badge {
    background: rgba(245, 158, 11, 0.2);
    color: var(--warning);
}

/* ========================================
   Coins Display
   ======================================== */
.coins-display {
    display: flex;
    align-items: center;
    gap: 6px;
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.2), rgba(234, 179, 8, 0.1));
    border: 1px solid rgba(245, 158, 11, 0.3);
    padding: 6px 12px;
    border-radius: var(--radius-full);
    font-weight: 600;
    color: #fbbf24;
}

.coins-display .coin-icon {
    font-size: 16px;
}

.coins-display .coin-amount {
    font-size: 14px;
}

/* ========================================
   Daily Bonus
   ======================================== */
.daily-bonus-popup {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 300;
    padding: var(--spacing-lg);
}

.daily-bonus-content {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    max-width: 340px;
    width: 100%;
    text-align: center;
}

.daily-bonus-content h2 {
    font-size: 24px;
    margin-bottom: var(--spacing-md);
}

.streak-days {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: var(--spacing-lg);
}

.streak-day {
    width: 40px;
    height: 50px;
    background: var(--bg-glass);
    border-radius: var(--radius-sm);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 12px;
}

.streak-day.active {
    background: var(--accent-gradient);
}

.streak-day.claimed {
    background: rgba(34, 197, 94, 0.3);
    border: 1px solid var(--success);
}

.streak-day .day-num {
    font-weight: 700;
}

.streak-day .day-coins {
    font-size: 10px;
    color: var(--text-secondary);
}

.bonus-reward {
    font-size: 48px;
    margin-bottom: var(--spacing-md);
}

.bonus-coins {
    font-size: 32px;
    font-weight: 800;
    color: #fbbf24;
    margin-bottom: var(--spacing-lg);
}

/* ========================================
   Ad Overlay
   ======================================== */
.ad-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 400;
    padding: var(--spacing-lg);
}

.ad-container {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 340px;
    overflow: hidden;
}

.ad-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--bg-card);
    font-size: 14px;
    color: var(--text-secondary);
}

.ad-timer {
    background: var(--accent-gradient);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-weight: 700;
    color: white;
}

.ad-content {
    min-height: 250px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-glass);
}

.ad-reward {
    padding: var(--spacing-md);
    text-align: center;
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.2), rgba(234, 179, 8, 0.1));
    color: #fbbf24;
    font-weight: 600;
}

/* ========================================
   Missions
   ======================================== */
.missions-section {
    padding: var(--spacing-lg);
}

.missions-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.missions-header h3 {
    font-size: 18px;
}

.missions-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.mission-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: all var(--transition-fast);
}

.mission-card.complete {
    border: 1px solid var(--success);
    background: rgba(34, 197, 94, 0.1);
}

.mission-card.claimed {
    opacity: 0.5;
}

.mission-icon {
    font-size: 28px;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-glass);
    border-radius: var(--radius-md);
}

.mission-info {
    flex: 1;
}

.mission-title {
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 2px;
}

.mission-desc {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.mission-progress {
    height: 4px;
    background: var(--bg-glass);
    border-radius: 2px;
    overflow: hidden;
}

.mission-progress-fill {
    height: 100%;
    background: var(--accent-gradient);
    transition: width 0.3s ease;
}

.mission-reward {
    padding: 6px 12px;
    background: rgba(245, 158, 11, 0.2);
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 700;
    color: #fbbf24;
}

.mission-claim-btn {
    padding: 8px 16px;
    background: var(--accent-gradient);
    border: none;
    border-radius: var(--radius-sm);
    color: white;
    font-weight: 600;
    cursor: pointer;
}

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

/* ========================================
   Coin Exchange
   ======================================== */
.exchange-section {
    padding: var(--spacing-lg);
}

.exchange-card {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    text-align: center;
}

.exchange-rate {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
    font-size: 24px;
}

.exchange-arrow {
    color: var(--text-secondary);
}

.exchange-input {
    background: var(--bg-glass);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    font-size: 24px;
    font-weight: 700;
    color: white;
    text-align: center;
    width: 100%;
    margin-bottom: var(--spacing-md);
}

.exchange-result {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.exchange-result span {
    color: #fbbf24;
    font-weight: 700;
}

/* ========================================
   Welcome Screen - Logo & Banner
   ======================================== */
.welcome-logo {
    width: 100px;
    height: 100px;
    border-radius: 24px;
    margin-bottom: var(--spacing-md);
    box-shadow: 0 8px 32px rgba(99, 102, 241, 0.4);
    animation: logoFloat 3s ease-in-out infinite;
}

@keyframes logoFloat {

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

    50% {
        transform: translateY(-10px);
    }
}

.welcome-banner {
    width: 100%;
    max-width: 320px;
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-md);
}

.mode-header {
    text-align: center;
    padding: var(--spacing-lg);
}

.earn-lock-notice {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(239, 68, 68, 0.2);
    border-radius: var(--radius-sm);
    font-size: 12px;
    color: #fca5a5;
}

.lock-icon {
    font-size: 14px;
}

/* ========================================
   Pre-Game Mode Selection Modal
   ======================================== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.2s ease;
}

.pregame-modal-content {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    max-width: 340px;
    width: 90%;
    text-align: center;
    position: relative;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }

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

.pregame-modal-content h2 {
    font-size: 20px;
    margin-bottom: var(--spacing-sm);
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.pregame-modal-content>p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.pregame-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.pregame-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-lg);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    background: var(--bg-glass);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.pregame-btn:hover {
    border-color: var(--accent-primary);
    transform: scale(1.02);
}

.pregame-btn.learn:hover {
    border-color: var(--success);
    background: rgba(34, 197, 94, 0.1);
}

.pregame-btn.earn:hover {
    border-color: #fbbf24;
    background: rgba(245, 158, 11, 0.1);
}

.pregame-btn.earn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

.pregame-icon {
    font-size: 32px;
    margin-bottom: var(--spacing-sm);
}

.pregame-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.pregame-desc {
    font-size: 12px;
    color: var(--text-secondary);
}

.pregame-earn-locked {
    background: rgba(239, 68, 68, 0.1);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.pregame-earn-locked p {
    font-size: 13px;
    color: #fca5a5;
    margin: 0;
}

.days-remaining {
    font-weight: 600;
    margin-top: var(--spacing-xs) !important;
}

.pregame-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 32px;
    height: 32px;
    border: none;
    background: var(--bg-glass);
    color: var(--text-secondary);
    border-radius: var(--radius-full);
    cursor: pointer;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.pregame-close:hover {
    background: rgba(239, 68, 68, 0.2);
    color: var(--error);
}

/* ========================================
   Result Screen - Coins & Ads
   ======================================== */
.result-coins-earned {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: rgba(245, 158, 11, 0.15);
    border-radius: var(--radius-md);
    animation: coinBounce 0.5s ease;
}

@keyframes coinBounce {

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

    50% {
        transform: scale(1.1);
    }
}

.coins-earned-label {
    font-size: 14px;
    color: var(--text-secondary);
}

.coins-earned-value {
    font-size: 28px;
    font-weight: 800;
    color: #fbbf24;
}

.result-ad-container {
    margin: var(--spacing-lg) 0;
    min-height: 100px;
    border-radius: var(--radius-md);
    overflow: hidden;
}

/* ========================================
   Enhanced Leaderboard
   ======================================== */
.your-rank-card {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(139, 92, 246, 0.1));
    border-color: rgba(99, 102, 241, 0.3);
}

.your-rank-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.your-rank-avatar {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-full);
    background: var(--bg-glass);
    object-fit: cover;
}

.your-rank-details {
    display: flex;
    flex-direction: column;
}

.your-rank-name {
    font-size: 18px;
    font-weight: 600;
}

.your-rank-username {
    font-size: 13px;
    color: var(--text-secondary);
}

.your-rank-stats {
    display: flex;
    justify-content: space-around;
}

.rank-stat {
    text-align: center;
}

.rank-stat-value {
    display: block;
    font-size: 20px;
    font-weight: 700;
    color: var(--accent-primary);
}

.rank-stat-label {
    font-size: 11px;
    color: var(--text-muted);
}

.player-avatar-img {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    object-fit: cover;
    margin-bottom: var(--spacing-sm);
}

.top-player.first .player-avatar-img {
    width: 64px;
    height: 64px;
    border: 3px solid #ffd700;
    box-shadow: 0 0 20px rgba(255, 215, 0, 0.4);
}

.player-medal {
    font-size: 20px;
    margin-bottom: var(--spacing-xs);
}

.player-level {
    font-size: 11px;
    color: var(--accent-primary);
    margin-bottom: 2px;
}

.leaderboard-loading {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
}

.leaderboard-item .player-level {
    font-size: 11px;
    color: var(--text-muted);
    margin-left: var(--spacing-sm);
}

.leaderboard-item .player-avatar-small {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    margin-right: var(--spacing-sm);
}

/* ========================================
   Referral Section
   ======================================== */
.referral-section {
    margin-top: var(--spacing-xl);
}

.referral-section h3 {
    font-size: 16px;
    margin-bottom: var(--spacing-md);
}

.referral-card {
    text-align: center;
}

.referral-reward {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.referral-bonus {
    font-size: 28px;
    font-weight: 800;
    color: #fbbf24;
}

.referral-text {
    font-size: 14px;
    color: var(--text-secondary);
}

.referral-code-box {
    margin-bottom: var(--spacing-lg);
}

.referral-label {
    display: block;
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
}

.referral-code-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    background: var(--bg-tertiary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
}

.referral-code {
    font-size: 20px;
    font-weight: 700;
    font-family: monospace;
    letter-spacing: 2px;
    color: var(--accent-primary);
}

.copy-btn {
    width: 36px;
    height: 36px;
    background: var(--accent-gradient);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.copy-btn:active {
    transform: scale(0.9);
}

.referral-stats {
    display: flex;
    justify-content: space-around;
    margin-bottom: var(--spacing-lg);
}

.referral-stat {
    text-align: center;
}

.referral-stat-value {
    display: block;
    font-size: 24px;
    font-weight: 700;
    color: var(--success);
}

.referral-stat-label {
    font-size: 11px;
    color: var(--text-muted);
}

.referral-share-btn {
    width: 100%;
}

/* Profile Avatar Image */
.profile-avatar-img {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-full);
    object-fit: cover;
    margin-bottom: var(--spacing-md);
    border: 3px solid var(--accent-primary);
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
}

.profile-avatar-fallback {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-full);
    background: var(--accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
    margin-bottom: var(--spacing-md);
}

/* Leaderboard Avatar Fallback */
.player-avatar-img {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    object-fit: cover;
    margin-bottom: var(--spacing-sm);
    background: var(--bg-glass);
}

.player-avatar-img[src=""],
.player-avatar-img:not([src]) {
    background: var(--accent-gradient);
}

.your-rank-avatar {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-full);
    background: var(--accent-gradient);
    object-fit: cover;
}

.your-rank-avatar[src=""],
.your-rank-avatar:not([src]) {
    background: var(--accent-gradient);
}