/* SEDA Speed Challenge - Styled to match SEDA Explorer */

:root {
    /* SEDA Color Palette */
    --primary-blue: #0066ff;
    --primary-blue-dark: #0052cc;
    --primary-blue-light: #3385ff;
    --secondary-purple: #7c3aed;
    --accent-cyan: #06b6d4;
    --accent-green: #10b981;
    --accent-orange: #f59e0b;
    --accent-red: #ef4444;
    
    /* Neutral Colors */
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-tertiary: #1a1a1a;
    --bg-card: #1e1e1e;
    --bg-hover: #2a2a2a;
    
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --text-accent: #06b6d4;
    
    --border-color: #2a2a2a;
    --border-light: #3a3a3a;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-purple) 100%);
    --gradient-accent: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-green) 100%);
    --gradient-bg: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 20px rgba(0, 102, 255, 0.3);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

body {
    font-family: var(--font-family);
    background: var(--gradient-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
}

/* Header Styles */
@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.subtitle {
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
    font-weight: 400;
}

/* Main Game Container */
.game-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-8);
    position: relative;
}

.screen {
    display: none;
    width: 100%;
    max-width: 800px;
    animation: fadeIn 0.5s ease;
}

.screen.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Welcome Card */
.welcome-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-2xl);
    padding: var(--space-12);
    text-align: center;
    box-shadow: var(--shadow-xl);
    position: relative;
    overflow: hidden;
}

.welcome-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.start-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    align-items: center;
    margin-top: var(--space-6);
}

.leaderboard-button {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: var(--space-4) var(--space-6);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-lg);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    gap: var(--space-2);
    min-width: 200px;
    justify-content: center;
}

.leaderboard-button:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-blue);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.leaderboard-button:active {
    transform: translateY(0);
}

/* Leaderboard Screen Styles */
.leaderboard-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    max-width: 800px;
    margin: 0 auto;
    box-shadow: var(--shadow-xl);
    position: relative;
    overflow: hidden;
}

.leaderboard-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.leaderboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--border-color);
}

.leaderboard-header h2 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
}

.back-button {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.back-button:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-blue);
    transform: translateY(-1px);
}

.leaderboard-footer {
    margin-top: var(--space-6);
    padding-top: var(--space-4);
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.leaderboard-footer p {
    color: var(--text-secondary);
    margin-bottom: var(--space-4);
    font-size: var(--font-size-sm);
}

/* Pagination Styles */
.leaderboard-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-2);
    margin-top: var(--space-4);
    padding-top: var(--space-4);
    border-top: 1px solid var(--border-color);
}

.pagination-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    min-width: 40px;
    text-align: center;
}

.pagination-btn:hover:not(:disabled) {
    background: var(--bg-hover);
    border-color: var(--primary-blue);
    transform: translateY(-1px);
}

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

.pagination-btn.active {
    background: var(--primary-blue);
    color: white;
    border-color: var(--primary-blue);
}

.pagination-info {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin: 0 var(--space-4);
}

.welcome-card h2 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.welcome-card p {
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-8);
    line-height: 1.7;
}

/* Mode Selector */
.seda-info h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--space-6);
    color: var(--text-primary);
}

.mode-selector {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-4);
    margin-bottom: var(--space-8);
}

.mode-btn {
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.mode-btn:hover {
    border-color: var(--primary-blue);
    background: var(--bg-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Mode-specific hover colors */
.mode-btn[data-mode="core"]:hover {
    border-color: var(--primary-blue);
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.05) 0%, rgba(0, 102, 255, 0.02) 100%);
    box-shadow: 0 0 15px rgba(0, 102, 255, 0.2);
}

.mode-btn[data-mode="fast-200"]:hover {
    border-color: var(--accent-cyan);
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.05) 0%, rgba(6, 182, 212, 0.02) 100%);
    box-shadow: 0 0 15px rgba(6, 182, 212, 0.2);
}

.mode-btn[data-mode="fast-50"]:hover {
    border-color: var(--accent-green);
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.05) 0%, rgba(16, 185, 129, 0.02) 100%);
    box-shadow: 0 0 15px rgba(16, 185, 129, 0.2);
}

.mode-btn[data-mode="fast-10"]:hover {
    border-color: var(--accent-orange);
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.05) 0%, rgba(245, 158, 11, 0.02) 100%);
    box-shadow: 0 0 15px rgba(245, 158, 11, 0.2);
}

.mode-btn[data-mode="fast-1"]:hover {
    border-color: var(--accent-red);
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.05) 0%, rgba(239, 68, 68, 0.02) 100%);
    box-shadow: 0 0 15px rgba(239, 68, 68, 0.2);
}

.mode-btn.active {
    border-color: var(--primary-blue);
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.1) 0%, rgba(124, 58, 237, 0.1) 100%);
    box-shadow: var(--shadow-glow);
}

.mode-btn.active::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
}

/* Mode-specific colors */
.mode-btn[data-mode="core"].active {
    border-color: var(--primary-blue);
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.1) 0%, rgba(0, 102, 255, 0.05) 100%);
    box-shadow: 0 0 20px rgba(0, 102, 255, 0.3);
}

.mode-btn[data-mode="core"].active::before {
    background: var(--primary-blue);
}

.mode-btn[data-mode="fast-200"].active {
    border-color: var(--accent-cyan);
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.1) 0%, rgba(6, 182, 212, 0.05) 100%);
    box-shadow: 0 0 20px rgba(6, 182, 212, 0.3);
}

.mode-btn[data-mode="fast-200"].active::before {
    background: var(--accent-cyan);
}

.mode-btn[data-mode="fast-50"].active {
    border-color: var(--accent-green);
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(16, 185, 129, 0.05) 100%);
    box-shadow: 0 0 20px rgba(16, 185, 129, 0.3);
}

.mode-btn[data-mode="fast-50"].active::before {
    background: var(--accent-green);
}

.mode-btn[data-mode="fast-10"].active {
    border-color: var(--accent-orange);
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1) 0%, rgba(245, 158, 11, 0.05) 100%);
    box-shadow: 0 0 20px rgba(245, 158, 11, 0.3);
}

.mode-btn[data-mode="fast-10"].active::before {
    background: var(--accent-orange);
}

.mode-btn[data-mode="fast-1"].active {
    border-color: var(--accent-red);
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1) 0%, rgba(239, 68, 68, 0.05) 100%);
    box-shadow: 0 0 20px rgba(239, 68, 68, 0.3);
}

.mode-btn[data-mode="fast-1"].active::before {
    background: var(--accent-red);
}

.mode-name {
    display: block;
    font-weight: 600;
    font-size: var(--font-size-lg);
    color: var(--text-primary);
    margin-bottom: var(--space-1);
}

.mode-speed {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* Audio Toggle */
.audio-toggle {
    margin-bottom: var(--space-8);
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    cursor: pointer;
    font-size: var(--font-size-lg);
    color: var(--text-primary);
}

.toggle-slider {
    position: relative;
    width: 50px;
    height: 24px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.toggle-slider::before {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 18px;
    height: 18px;
    background: var(--text-secondary);
    border-radius: var(--radius-full);
    transition: all var(--transition-normal);
}

.toggle-label input[type="checkbox"] {
    display: none;
}

.toggle-label input[type="checkbox"]:checked + .toggle-slider {
    background: var(--primary-blue);
    border-color: var(--primary-blue);
}

.toggle-label input[type="checkbox"]:checked + .toggle-slider::before {
    transform: translateX(26px);
    background: white;
}

/* Start Button */
.start-button {
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--radius-xl);
    padding: var(--space-6) var(--space-12);
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: white;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-lg);
}

.start-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.start-button:active {
    transform: translateY(0);
}

.button-glow {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.start-button:hover .button-glow {
    left: 100%;
}

/* Countdown Screen */
.countdown-container {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 10;
    border-radius: var(--radius-2xl);
}

.countdown-circle {
    width: 120px;
    height: 120px;
    border-radius: var(--radius-full);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: white;
    box-shadow: var(--shadow-glow);
    animation: countdownPulse 1s infinite;
    margin-bottom: var(--space-8);
}

@keyframes countdownPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.countdown-text {
    text-align: center;
}

.countdown-text h2 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.countdown-text p {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Game Screen */
.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-6);
    padding: var(--space-6);
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    min-height: 80px;
}

.timer-container {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.timer-circle {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-full);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: white;
    box-shadow: var(--shadow-glow);
    animation: timerPulse 1s infinite;
}

@keyframes timerPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.score-display {
    display: flex;
    gap: var(--space-8);
}

.user-score, .seda-score {
    text-align: center;
}

.label {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--space-1);
}

.user-score span:last-child,
.seda-score span:last-child {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
}

.user-score span:last-child {
    color: var(--accent-green);
}

.seda-score span:last-child {
    color: var(--primary-blue);
}

/* Game Area */
.game-area {
    position: relative;
    margin-bottom: var(--space-8);
}

/* Race Track */
.race-track {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-8) var(--space-6);
    margin-bottom: var(--space-6);
    position: relative;
    overflow: visible;
}

.race-track-container {
    position: relative;
    height: 80px;
    padding-top: var(--space-4);
}

.race-track-line {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    transform: translateY(-50%);
}

.race-track-labels {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-between;
    z-index: 2;
    padding: 0 var(--space-2);
}

.race-label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-secondary);
    background: var(--bg-card);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.race-racers {
    position: absolute;
    top: var(--space-4);
    left: 0;
    right: 0;
    height: 60px;
    z-index: 3;
}

.racer {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: left var(--transition-normal);
    box-shadow: var(--shadow-md);
    margin-left: -18px; /* Half width to center properly */
}

.user-racer {
    background: var(--accent-green);
    left: 0;
}

.seda-racer {
    background: var(--primary-blue);
    left: 0;
}

.racer-icon {
    font-size: var(--font-size-lg);
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.3));
}

/* SEDA mode colors for race track */
.race-track.core {
    border-color: var(--primary-blue);
}

.race-track.fast-200 {
    border-color: var(--accent-cyan);
}

.race-track.fast-50 {
    border-color: var(--accent-green);
}

.race-track.fast-10 {
    border-color: var(--accent-orange);
}

.race-track.fast-1 {
    border-color: var(--accent-red);
}

.seda-racer.core {
    background: var(--primary-blue);
}

.seda-racer.fast-200 {
    background: var(--accent-cyan);
}

.seda-racer.fast-50 {
    background: var(--accent-green);
}

.seda-racer.fast-10 {
    background: var(--accent-orange);
}

.seda-racer.fast-1 {
    background: var(--accent-red);
}

.click-zone {
    background: var(--bg-card);
    border: 3px dashed var(--border-color);
    border-radius: var(--radius-2xl);
    padding: var(--space-16);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    min-height: 250px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: var(--space-4);
}

.click-zone:hover {
    border-color: var(--primary-blue);
    background: var(--bg-hover);
    transform: scale(1.02);
}

.click-zone:active {
    transform: scale(0.98);
}

/* SEDA mode colors for click zone */
.click-zone.core {
    border-color: var(--primary-blue);
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(0, 102, 255, 0.02) 100%);
}

.click-zone.fast-200 {
    border-color: var(--accent-cyan);
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(6, 182, 212, 0.02) 100%);
}

.click-zone.fast-50 {
    border-color: var(--accent-green);
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(16, 185, 129, 0.02) 100%);
}

.click-zone.fast-10 {
    border-color: var(--accent-orange);
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(245, 158, 11, 0.02) 100%);
}

.click-zone.fast-1 {
    border-color: var(--accent-red);
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(239, 68, 68, 0.02) 100%);
}

.click-instruction h3 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--space-2);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.click-instruction p {
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-3);
}

.spacebar-hint {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-top: var(--space-2);
    position: relative;
}

.key-hint {
    background: var(--bg-tertiary);
    color: var(--primary-blue);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
    font-family: 'Courier New', monospace;
    font-weight: 600;
    border: 1px solid var(--primary-blue);
    font-size: var(--font-size-xs);
}


.click-effects {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.click-effect {
    position: absolute;
    width: 20px;
    height: 20px;
    background: var(--accent-green);
    border-radius: var(--radius-full);
    animation: clickAnimation 0.6s ease-out forwards;
}

.spacebar-effect {
    background: var(--primary-blue);
    width: 30px;
    height: 30px;
    animation: spacebarAnimation 0.6s ease-out forwards;
}

@keyframes clickAnimation {
    0% {
        transform: scale(0);
        opacity: 1;
    }
    100% {
        transform: scale(3);
        opacity: 0;
    }
}

@keyframes spacebarAnimation {
    0% {
        transform: scale(0);
        opacity: 1;
    }
    50% {
        transform: scale(2);
        opacity: 0.8;
    }
    100% {
        transform: scale(4);
        opacity: 0;
    }
}

/* SEDA Visualizer */
.seda-visualizer {
    position: absolute;
    top: var(--space-6);
    right: var(--space-6);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    z-index: 5;
}

.seda-pulse {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    animation: sedaPulse 1s infinite;
    box-shadow: var(--shadow-glow);
    transition: all var(--transition-normal);
}

/* SEDA Mode Colors */
.seda-pulse.core {
    background: var(--primary-blue);
    box-shadow: 0 0 20px rgba(0, 102, 255, 0.3);
}

.seda-pulse.fast-200 {
    background: var(--accent-cyan);
    box-shadow: 0 0 20px rgba(6, 182, 212, 0.3);
    animation: sedaPulse 0.2s infinite;
}

.seda-pulse.fast-50 {
    background: var(--accent-green);
    box-shadow: 0 0 20px rgba(16, 185, 129, 0.3);
    animation: sedaPulse 0.05s infinite;
}

.seda-pulse.fast-10 {
    background: var(--accent-orange);
    box-shadow: 0 0 20px rgba(245, 158, 11, 0.3);
    animation: sedaPulse 0.01s infinite;
}

.seda-pulse.fast-1 {
    background: var(--accent-red);
    box-shadow: 0 0 20px rgba(239, 68, 68, 0.3);
    animation: sedaPulse 0.001s infinite;
}

@keyframes sedaPulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.2); opacity: 0.8; }
}

@keyframes screenShake {
    0%, 100% { transform: translateX(0); }
    10% { transform: translateX(-2px) rotate(-0.5deg); }
    20% { transform: translateX(2px) rotate(0.5deg); }
    30% { transform: translateX(-2px) rotate(-0.5deg); }
    40% { transform: translateX(2px) rotate(0.5deg); }
    50% { transform: translateX(-1px) rotate(-0.25deg); }
    60% { transform: translateX(1px) rotate(0.25deg); }
    70% { transform: translateX(-1px) rotate(-0.25deg); }
    80% { transform: translateX(1px) rotate(0.25deg); }
    90% { transform: translateX(-0.5px) rotate(-0.125deg); }
}

.seda-indicator {
    background: var(--bg-tertiary);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.seda-indicator.core {
    border-color: var(--primary-blue);
    background: rgba(0, 102, 255, 0.1);
}

.seda-indicator.fast-200 {
    border-color: var(--accent-cyan);
    background: rgba(6, 182, 212, 0.1);
}

.seda-indicator.fast-50 {
    border-color: var(--accent-green);
    background: rgba(16, 185, 129, 0.1);
}

.seda-indicator.fast-10 {
    border-color: var(--accent-orange);
    background: rgba(245, 158, 11, 0.1);
}

.seda-indicator.fast-1 {
    border-color: var(--accent-red);
    background: rgba(239, 68, 68, 0.1);
}

.seda-indicator span {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    font-weight: 500;
}

/* Game Stats */
.game-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-8);
    padding: var(--space-6);
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

/* SEDA mode colors for game stats */
.game-stats.core {
    border-color: var(--primary-blue);
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(0, 102, 255, 0.05) 100%);
}

.game-stats.fast-200 {
    border-color: var(--accent-cyan);
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(6, 182, 212, 0.05) 100%);
}

.game-stats.fast-50 {
    border-color: var(--accent-green);
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(16, 185, 129, 0.05) 100%);
}

.game-stats.fast-10 {
    border-color: var(--accent-orange);
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(245, 158, 11, 0.05) 100%);
}

.game-stats.fast-1 {
    border-color: var(--accent-red);
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(239, 68, 68, 0.05) 100%);
}

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

.stat-label {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--space-1);
}

.stat-item span:last-child {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
}

/* Results Screen */
.results-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-2xl);
    padding: var(--space-12);
    text-align: center;
    box-shadow: var(--shadow-xl);
    position: relative;
    overflow: hidden;
}

.results-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.results-header {
    margin-bottom: var(--space-8);
}

.results-header h2 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.performance-badge {
    display: inline-block;
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--font-size-lg);
}

.performance-badge.excellent {
    background: var(--accent-green);
    color: white;
}

.performance-badge.good {
    background: var(--accent-cyan);
    color: white;
}

.performance-badge.fair {
    background: var(--accent-orange);
    color: white;
}

.performance-badge.poor {
    background: var(--accent-red);
    color: white;
}

.results-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-6);
    margin-bottom: var(--space-8);
    padding: var(--space-6);
    background: var(--bg-tertiary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
}

.stat-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-4);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    min-height: 60px;
}

.stat-label {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    font-weight: 500;
    white-space: nowrap;
    flex-shrink: 0;
}

.stat-value {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    white-space: nowrap;
    text-align: right;
    flex-shrink: 0;
}

.performance-message {
    margin-bottom: var(--space-8);
    padding: var(--space-6);
    background: var(--bg-tertiary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
}

.performance-message p {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    line-height: 1.7;
}

.seda-education {
    margin-bottom: var(--space-8);
    padding: var(--space-6);
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.1) 0%, rgba(124, 58, 237, 0.1) 100%);
    border-radius: var(--radius-xl);
    border: 1px solid var(--primary-blue);
}

.seda-education h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--space-4);
    color: var(--text-primary);
}

.seda-education p {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    line-height: 1.7;
}

.action-buttons {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    flex-wrap: wrap;
}

.action-btn {
    padding: var(--space-4) var(--space-8);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-lg);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: none;
    min-width: 150px;
}

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

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

.action-btn.secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.action-btn.secondary:hover {
    background: var(--bg-hover);
    border-color: var(--primary-blue);
}

/* Footer */
.footer {
    padding: var(--space-6) var(--space-8);
    text-align: center;
    background: rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-6);
    flex-wrap: wrap;
}

.footer p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.footer a {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 500;
}

.footer a:hover {
    color: var(--primary-blue-light);
    text-decoration: underline;
}

/* SEDA Speed Comparison Page Styles */
.comparison-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-8);
    text-align: center;
    overflow: visible;
}

.comparison-header {
    margin-bottom: var(--space-12);
    position: relative;
}

.comparison-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.comparison-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.speed-comparison {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    margin-bottom: var(--space-12);
    position: relative;
    overflow: hidden;
}

.seda-speeds {
    margin-bottom: var(--space-2);
}

.speed-labels {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    height: 60px;
    margin: 0 var(--space-4);
}

.speed-label {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-purple));
    color: white;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: var(--font-size-sm);
    position: relative;
    z-index: 2;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    cursor: pointer;
    user-select: none;
}

.speed-label:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, var(--primary-blue-light), var(--secondary-purple));
}

.speed-label:active {
    transform: translateY(0);
    box-shadow: var(--shadow-md);
}

.slider-container {
    position: relative;
    height: 40px;
    margin: var(--space-3) 0;
}

.slider-track {
    position: relative;
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    cursor: pointer;
    margin: 0 var(--space-4);
    width: calc(100% - var(--space-8));
}

.slider-line {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    background: linear-gradient(90deg, var(--primary-blue), var(--secondary-purple));
    border-radius: 2px;
    opacity: 0.3;
}

.slider-handle {
    position: absolute;
    top: -12px;
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-purple));
    border: 3px solid var(--bg-primary);
    border-radius: 50%;
    cursor: grab;
    transform: translateX(-50%);
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-normal);
    z-index: 3;
}

.slider-handle:hover {
    transform: translateX(-50%) scale(1.1);
    box-shadow: var(--shadow-xl);
}

.slider-handle:active {
    cursor: grabbing;
    transform: translateX(-50%) scale(1.05);
}

.speed-indicator {
    position: absolute;
    top: -8px;
    width: 8px;
    height: 8px;
    background: var(--accent-cyan);
    border-radius: 50%;
    transform: translateX(-50%);
    box-shadow: 0 0 10px var(--accent-cyan);
    z-index: 1;
}

.blockchain-times {
    margin-top: var(--space-1);
}

.blockchain-labels {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    height: 80px;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin: 0 var(--space-4);
}

.blockchain-label {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: var(--font-size-xs);
    text-align: center;
    line-height: 1.2;
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    flex: 1;
    min-width: 80px;
    cursor: pointer;
    user-select: none;
}

.blockchain-label:hover {
    background: var(--bg-primary);
    color: var(--text-primary);
    border-color: var(--primary-blue);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.blockchain-label:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.current-speed-display {
    text-align: center;
    margin-top: var(--space-6);
    margin-bottom: var(--space-4);
}

.speed-value {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.speed-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto;
}

.sound-controls {
    position: absolute;
    top: 0;
    right: 0;
    z-index: 10;
}

.sound-toggle {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
}

.sound-toggle:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-blue);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.sound-toggle:active {
    transform: translateY(0);
}

.speed-demo {
    position: relative;
    height: 200px;
    margin-bottom: var(--space-12);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: visible;
    z-index: 1;
}

.demo-pulse {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-purple));
    border-radius: 50%;
    animation: pulse 1000ms infinite ease-in-out;
    box-shadow: 
        0 0 40px rgba(0, 102, 255, 0.6),
        0 0 80px rgba(0, 102, 255, 0.3),
        0 0 120px rgba(0, 102, 255, 0.1);
    position: relative;
    z-index: 2;
}

.demo-pulse::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 600px;
    height: 600px;
    margin: -300px 0 0 -300px;
    background: radial-gradient(circle, rgba(0, 102, 255, 0.12) 0%, rgba(0, 102, 255, 0.06) 40%, rgba(0, 102, 255, 0.03) 70%, transparent 100%);
    border-radius: 50%;
    z-index: -1;
    pointer-events: none;
}

.demo-pulse::before {
    content: '';
    position: absolute;
    top: -20px;
    left: -20px;
    right: -20px;
    bottom: -20px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-purple));
    opacity: 0.3;
    animation: pulse-ring 1000ms infinite ease-in-out;
    z-index: -1;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

@keyframes pulse-ring {
    0% {
        transform: scale(0.8);
        opacity: 0.8;
    }
    50% {
        transform: scale(1.2);
        opacity: 0.4;
    }
    100% {
        transform: scale(1.6);
        opacity: 0;
    }
}

.demo-text {
    position: absolute;
    bottom: -30px;
    font-size: var(--font-size-sm);
    color: var(--text-tertiary);
}


.nav-link.active {
    color: var(--primary-blue);
    font-weight: 600;
}

/* Mobile Responsiveness for Comparison Page */
@media (max-width: 768px) {
    .comparison-container {
        padding: var(--space-4);
    }
    
    .comparison-title {
        font-size: var(--font-size-3xl);
    }
    
    .speed-labels {
        flex-wrap: wrap;
        gap: var(--space-1);
        height: auto;
        margin: 0 var(--space-2);
    }
    
    .speed-label {
        font-size: var(--font-size-xs);
        padding: var(--space-1) var(--space-2);
        flex: 1;
        min-width: 60px;
        text-align: center;
    }
    
    .blockchain-labels {
        flex-direction: row;
        flex-wrap: wrap;
        height: auto;
        gap: var(--space-1);
        margin: 0 var(--space-2);
    }
    
    .blockchain-label {
        flex: 1;
        min-width: 80px;
        font-size: var(--font-size-xs);
        padding: var(--space-1) var(--space-2);
    }
    
    .speed-value {
        font-size: var(--font-size-4xl);
    }
    
    .speed-description {
        font-size: var(--font-size-base);
    }
    
    .slider-track {
        margin: 0 var(--space-2);
        width: calc(100% - var(--space-4));
    }
}

/* Mobile Optimizations */
@media (max-width: 768px) {
    
    .subtitle {
        font-size: var(--font-size-base);
    }
    
    .game-container {
        padding: var(--space-4);
        min-height: 100vh;
        min-height: 100dvh; /* Dynamic viewport height for mobile */
    }
    
    .welcome-card {
        padding: var(--space-8);
    }
    
    .welcome-card h2 {
        font-size: var(--font-size-3xl);
    }
    
    .mode-selector {
        grid-template-columns: 1fr;
    }
    
    .mode-btn {
        min-height: 48px; /* Minimum touch target size */
        font-size: var(--font-size-sm);
        -webkit-tap-highlight-color: transparent;
    }
    
    .game-header {
        flex-direction: column;
        gap: var(--space-4);
        padding: var(--space-4);
    }
    
    .score-display {
        gap: var(--space-4);
    }
    
    .click-zone {
        padding: var(--space-8);
        min-height: 200px;
        font-size: var(--font-size-lg);
        /* Prevent text selection on mobile */
        -webkit-user-select: none;
        -moz-user-select: none;
        -ms-user-select: none;
        user-select: none;
        /* Prevent zoom on double tap */
        touch-action: manipulation;
        -webkit-tap-highlight-color: transparent;
    }
    
    .click-instruction h3 {
        font-size: var(--font-size-xl);
        margin-bottom: var(--space-2);
    }
    
    .click-instruction p {
        font-size: var(--font-size-sm);
    }
    
    .spacebar-hint {
        font-size: var(--font-size-xs);
        margin-top: var(--space-2);
    }
    
    /* Race track mobile adjustments */
    .race-track {
        padding: var(--space-4);
        margin-bottom: var(--space-4);
    }
    
    .race-track-container {
        height: 60px;
    }
    
    .racer {
        width: 32px;
        height: 32px;
        margin-left: -16px;
    }
    
    .racer-icon {
        font-size: 14px;
    }
    
    /* SEDA visualizer mobile positioning */
    .seda-visualizer {
        top: var(--space-4);
        right: var(--space-4);
    }
    
    .seda-pulse {
        width: 28px;
        height: 28px;
    }
    
    .results-stats {
        grid-template-columns: 1fr;
    }
    
    .stat-row {
        flex-direction: column;
        align-items: center;
        gap: var(--space-2);
        text-align: center;
    }
    
    .stat-value {
        text-align: center;
    }
    
    .action-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .action-btn {
        width: 100%;
        max-width: 300px;
        min-height: 48px;
    }
    
    /* Prevent horizontal scroll */
    body {
        overflow-x: hidden;
    }
}

@media (max-width: 480px) {
    .welcome-card {
        padding: var(--space-6);
    }
    
    .welcome-card h2 {
        font-size: var(--font-size-2xl);
    }
    
    .start-actions {
        gap: var(--space-3);
    }
    
    .leaderboard-button {
        min-width: 180px;
        padding: var(--space-3) var(--space-4);
        font-size: var(--font-size-base);
    }
    
    .leaderboard-header {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }
    
    .leaderboard-header h2 {
        font-size: var(--font-size-2xl);
    }
    
    .click-zone {
        padding: var(--space-6);
        min-height: 150px;
    }
    
    .click-instruction h3 {
        font-size: var(--font-size-lg);
    }
    
    .click-instruction p {
        font-size: var(--font-size-xs);
    }
    
    .timer-circle {
        width: 60px;
        height: 60px;
        font-size: var(--font-size-2xl);
    }
    
    /* Race track small screen adjustments */
    .race-track {
        padding: var(--space-3);
    }
    
    .race-track-container {
        height: 50px;
    }
    
    .racer {
        width: 28px;
        height: 28px;
        margin-left: -14px;
    }
    
    .racer-icon {
        font-size: 12px;
    }
    
    .seda-pulse {
        width: 24px;
        height: 24px;
    }
    
    .mode-btn {
        padding: var(--space-3);
        font-size: var(--font-size-xs);
    }
}

/* Leaderboard Styles */
.leaderboard-section {
    margin-top: var(--space-8);
    padding: var(--space-6);
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
}

.leaderboard-section h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
    text-align: center;
}

.leaderboard-container {
    max-height: 300px;
    overflow-y: auto;
    margin-bottom: var(--space-6);
}

.leaderboard-loading {
    text-align: center;
    color: var(--text-secondary);
    font-style: italic;
    padding: var(--space-4);
}

.leaderboard-entry {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-3) var(--space-4);
    margin-bottom: var(--space-2);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    color: var(--text-primary);
}

.leaderboard-entry:hover {
    background: var(--bg-hover);
    transform: translateX(4px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.leaderboard-entry:nth-child(1) {
    border-left: 4px solid #FFD700;
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(255, 215, 0, 0.1) 100%);
    box-shadow: 0 4px 20px rgba(255, 215, 0, 0.2);
    transform: scale(1.02);
    position: relative;
}

.leaderboard-entry:nth-child(1)::before {
    content: "👑";
    position: absolute;
    top: -8px;
    right: 8px;
    font-size: 20px;
    z-index: 1;
}

.leaderboard-entry:nth-child(2) {
    border-left: 4px solid #C0C0C0;
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(192, 192, 192, 0.1) 100%);
    box-shadow: 0 3px 15px rgba(192, 192, 192, 0.2);
    transform: scale(1.01);
    position: relative;
}

.leaderboard-entry:nth-child(2)::before {
    content: "🥈";
    position: absolute;
    top: -8px;
    right: 8px;
    font-size: 18px;
    z-index: 1;
}

.leaderboard-entry:nth-child(3) {
    border-left: 4px solid #CD7F32;
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(205, 127, 50, 0.1) 100%);
    box-shadow: 0 2px 10px rgba(205, 127, 50, 0.2);
    transform: scale(1.005);
    position: relative;
}

.leaderboard-entry:nth-child(3)::before {
    content: "🥉";
    position: absolute;
    top: -8px;
    right: 8px;
    font-size: 16px;
    z-index: 1;
}

.leaderboard-entry.current-player {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-light) 100%);
    color: white;
    border-color: var(--primary-blue);
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(0, 102, 255, 0.3);
}

.leaderboard-rank {
    font-weight: 700;
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    min-width: 30px;
}

.leaderboard-entry:nth-child(1) .leaderboard-rank {
    color: #FFD700;
}

.leaderboard-entry:nth-child(2) .leaderboard-rank {
    color: #C0C0C0;
}

.leaderboard-entry:nth-child(3) .leaderboard-rank {
    color: #CD7F32;
}

.leaderboard-entry.current-player .leaderboard-rank {
    color: white;
}

.leaderboard-player {
    flex: 1;
    margin-left: var(--space-3);
    font-weight: 500;
}

.leaderboard-player a {
    color: var(--primary-blue);
    text-decoration: none;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.leaderboard-player a:hover {
    color: var(--primary-blue-light);
    text-decoration: underline;
}

.leaderboard-player a::before {
    content: "𝕏";
    font-size: var(--font-size-sm);
    font-weight: 700;
    margin-right: var(--space-1);
}

.leaderboard-entry.current-player .leaderboard-player a {
    color: white;
}

.leaderboard-entry.current-player .leaderboard-player a:hover {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: underline;
}

.leaderboard-entry.current-player .leaderboard-mode {
    color: rgba(255, 255, 255, 0.9);
    font-weight: 600;
}

.leaderboard-entry.current-player .leaderboard-score {
    color: white;
    font-weight: 700;
}

/* SEDA Mode Colors */
.leaderboard-entry[data-mode="core"] {
    border-left-color: var(--primary-blue);
}

.leaderboard-entry[data-mode="fast-200"] {
    border-left-color: var(--accent-green);
}

.leaderboard-entry[data-mode="fast-50"] {
    border-left-color: var(--accent-orange);
}

.leaderboard-entry[data-mode="fast-10"] {
    border-left-color: var(--accent-purple);
}

.leaderboard-entry[data-mode="fast-1"] {
    border-left-color: var(--accent-red);
}

.leaderboard-score {
    font-weight: 600;
    color: var(--text-primary);
    font-size: var(--font-size-base);
}

.leaderboard-mode {
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    margin-left: var(--space-2);
    font-weight: 500;
    opacity: 0.9;
}

.submit-score-section {
    display: flex;
    gap: var(--space-3);
    align-items: center;
    flex-wrap: wrap;
}

#player-name-input {
    flex: 1;
    min-width: 200px;
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: var(--font-size-base);
    transition: all var(--transition-normal);
}

#player-name-input:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

#player-name-input::placeholder {
    color: var(--text-secondary);
}

#submit-score-btn {
    white-space: nowrap;
}

.leaderboard-empty {
    text-align: center;
    color: var(--text-secondary);
    font-style: italic;
    padding: var(--space-6);
}

/* Mobile leaderboard adjustments */
@media (max-width: 768px) {
    .leaderboard-section {
        margin-top: var(--space-6);
        padding: var(--space-4);
    }
    
    .leaderboard-entry {
        padding: var(--space-2) var(--space-3);
        font-size: var(--font-size-sm);
    }
    
    .leaderboard-rank {
        font-size: var(--font-size-base);
        min-width: 25px;
    }
    
    .submit-score-section {
        flex-direction: column;
        align-items: stretch;
    }
    
    #player-name-input {
        min-width: auto;
        width: 100%;
    }
    
    #submit-score-btn {
        width: 100%;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus states for keyboard navigation */
button:focus,
input:focus {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border-color: #ffffff;
        --text-secondary: #ffffff;
    }
}