:root {
    /* Primitive Color Tokens */
    --color-white: rgba(255, 255, 255, 1);
    --color-black: rgba(0, 0, 0, 1);
    --color-cream-50: rgba(252, 252, 249, 1);
    --color-cream-100: rgba(255, 255, 253, 1);
    --color-gray-200: rgba(245, 245, 245, 1);
    --color-gray-300: rgba(167, 169, 169, 1);
    --color-gray-400: rgba(119, 124, 124, 1);
    --color-slate-500: rgba(98, 108, 113, 1);
    --color-brown-600: rgba(94, 82, 64, 1);
    --color-charcoal-700: rgba(31, 33, 33, 1);
    --color-charcoal-800: rgba(38, 40, 40, 1);
    --color-slate-900: rgb(0, 208, 255);
    --color-teal-300: rgba(50, 184, 198, 1);
    --color-teal-400: rgba(45, 166, 178, 1);
    --color-teal-500: rgba(33, 128, 141, 1);
    --color-teal-600: rgba(29, 116, 128, 1);
    --color-teal-700: rgba(26, 104, 115, 1);
    --color-teal-800: rgba(41, 150, 161, 1);
    --color-red-400: rgba(255, 84, 89, 1);
    --color-red-500: rgba(192, 21, 47, 1);
    --color-orange-400: rgba(230, 129, 97, 1);
    --color-orange-500: rgba(168, 75, 47, 1);

    /* RGB versions for opacity control */
    --color-brown-600-rgb: 94, 82, 64;
    --color-teal-500-rgb: 33, 128, 141;
    --color-slate-900-rgb: 19, 52, 59;
    --color-slate-500-rgb: 98, 108, 113;
    --color-red-500-rgb: 192, 21, 47;
    --color-red-400-rgb: 255, 84, 89;
    --color-orange-500-rgb: 168, 75, 47;
    --color-orange-400-rgb: 230, 129, 97;

    /* Background color tokens (Light Mode) */
    --color-bg-1: rgba(59, 130, 246, 0.08);
    --color-bg-2: rgba(245, 158, 11, 0.08);
    --color-bg-3: rgba(34, 197, 94, 0.08);
    --color-bg-4: rgba(239, 68, 68, 0.08);
    --color-bg-5: rgba(147, 51, 234, 0.08);
    --color-bg-6: rgba(249, 115, 22, 0.08);
    --color-bg-7: rgba(236, 72, 153, 0.08);
    --color-bg-8: rgba(6, 182, 212, 0.08);

    /* Semantic Color Tokens (Light Mode) */
    --color-background: var(--color-cream-50);
    --color-surface: var(--color-cream-100);
    --color-text: var(--color-slate-900);
    --color-text-secondary: var(--color-slate-500);
    --color-primary: var(--color-teal-500);
    --color-primary-hover: var(--color-teal-600);
    --color-primary-active: var(--color-teal-700);
    --color-secondary: rgba(var(--color-brown-600-rgb), 0.12);
    --color-secondary-hover: rgba(var(--color-brown-600-rgb), 0.2);
    --color-secondary-active: rgba(var(--color-brown-600-rgb), 0.25);
    --color-border: rgba(var(--color-brown-600-rgb), 0.2);
    --color-btn-primary-text: var(--color-cream-50);
    --color-card-border: rgba(var(--color-brown-600-rgb), 0.12);
    --color-card-border-inner: rgba(var(--color-brown-600-rgb), 0.12);
    --color-error: var(--color-red-500);
    --color-success: var(--color-teal-500);
    --color-warning: var(--color-orange-500);
    --color-info: var(--color-slate-500);
    --color-focus-ring: rgba(var(--color-teal-500-rgb), 0.4);
    --color-select-caret: rgba(var(--color-slate-900-rgb), 0.8);

    /* Common style patterns */
    --focus-ring: 0 0 0 3px var(--color-focus-ring);
    --focus-outline: 2px solid var(--color-primary);
    --status-bg-opacity: 0.15;
    --status-border-opacity: 0.25;
    --select-caret-light: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    --select-caret-dark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");

    /* RGB versions for opacity control */
    --color-success-rgb: 33, 128, 141;
    --color-error-rgb: 192, 21, 47;
    --color-warning-rgb: 168, 75, 47;
    --color-info-rgb: 98, 108, 113;

    /* Typography Fonts */
    --font-family-base: "FKGroteskNeue", "Geist", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-family-mono: "Berkeley Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.02);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.04), 0 2px 4px -1px rgba(0, 0, 0, 0.02);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.04), 0 4px 6px -2px rgba(0, 0, 0, 0.02);
    --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.15), inset 0 -1px 0 rgba(0, 0, 0, 0.03);

    /* Animation */
    --duration-fast: 150ms;
    --duration-normal: 250ms;
    --ease-standard: cubic-bezier(0.16, 1, 0.3, 1);

    /* Gaming Color Palette */
    --gaming-bg: #0a0a0f;
    --gaming-surface: rgba(15, 15, 25, 0.8);
    --gaming-card: rgba(20, 20, 35, 0.9);
    --gaming-primary: #00ffff;
    --gaming-secondary: #ff00ff;
    --gaming-accent: #ffff00;
    --gaming-purple: #8a2be2;
    --gaming-blue: #1e90ff;
    --gaming-green: #00ff7f;
    --gaming-red: #ff4444;
    --gaming-text: #ffffff;
    --gaming-text-dim: rgba(255, 255, 255, 0.7);
    --gaming-border: rgba(0, 255, 255, 0.3);
    --gaming-glow: 0 0 20px;

    /* Animation Variables */
    --animation-fast: 0.3s;
    --animation-medium: 0.6s;
    --animation-slow: 1.2s;
    --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --ease-smooth: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Dark mode colors */
@media (prefers-color-scheme: dark) {
    :root {
        --color-gray-400-rgb: 119, 124, 124;
        --color-teal-300-rgb: 50, 184, 198;
        --color-gray-300-rgb: 167, 169, 169;
        --color-gray-200-rgb: 245, 245, 245;

        --color-bg-1: rgba(29, 78, 216, 0.15);
        --color-bg-2: rgba(180, 83, 9, 0.15);
        --color-bg-3: rgba(21, 128, 61, 0.15);
        --color-bg-4: rgba(185, 28, 28, 0.15);
        --color-bg-5: rgba(107, 33, 168, 0.15);
        --color-bg-6: rgba(194, 65, 12, 0.15);
        --color-bg-7: rgba(190, 24, 93, 0.15);
        --color-bg-8: rgba(8, 145, 178, 0.15);

        --color-background: var(--color-charcoal-700);
        --color-surface: var(--color-charcoal-800);
        --color-text: var(--color-gray-200);
        --color-text-secondary: rgba(var(--color-gray-300-rgb), 0.7);
        --color-primary: var(--color-teal-300);
        --color-primary-hover: var(--color-teal-400);
        --color-primary-active: var(--color-teal-800);
        --color-secondary: rgba(var(--color-gray-400-rgb), 0.15);
        --color-secondary-hover: rgba(var(--color-gray-400-rgb), 0.25);
        --color-secondary-active: rgba(var(--color-gray-400-rgb), 0.3);
        --color-border: rgba(var(--color-gray-400-rgb), 0.3);
        --color-error: var(--color-red-400);
        --color-success: var(--color-teal-300);
        --color-warning: var(--color-orange-400);
        --color-info: var(--color-gray-300);
        --color-focus-ring: rgba(var(--color-teal-300-rgb), 0.4);
        --color-btn-primary-text: var(--color-slate-900);
        --color-card-border: rgba(var(--color-gray-400-rgb), 0.2);
        --color-card-border-inner: rgba(var(--color-gray-400-rgb), 0.15);
        --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.1), inset 0 -1px 0 rgba(0, 0, 0, 0.15);
        --button-border-secondary: rgba(var(--color-gray-400-rgb), 0.2);
        --color-border-secondary: rgba(var(--color-gray-400-rgb), 0.2);
        --color-select-caret: rgba(var(--color-gray-200-rgb), 0.8);

        --focus-ring: 0 0 0 3px var(--color-focus-ring);
        --focus-outline: 2px solid var(--color-primary);
        --status-bg-opacity: 0.15;
        --status-border-opacity: 0.25;
        --select-caret-light: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
        --select-caret-dark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");

        --color-success-rgb: var(--color-teal-300-rgb);
        --color-error-rgb: var(--color-red-400-rgb);
        --color-warning-rgb: var(--color-orange-400-rgb);
        --color-info-rgb: var(--color-gray-300-rgb);
    }
}

/* Base theme application */
body {
    background: var(--gaming-bg);
    color: var(--gaming-text);
}

/* ✨ Parallax Star Background Styles */
#star-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 0;
    background: var(--gaming-bg);
    overflow: hidden;
    pointer-events: none;
}

.star-layer {
    position: absolute;
    width: 100%;
    height: 120vh;
    top: -20vh;
}

.star {
    position: absolute;
    background: #ffffff;
    border-radius: 50%;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
    box-shadow: 0 0 6px currentColor;
}

.star.white {
    background: #ffffff;
    color: #ffffff;
    box-shadow: 0 0 6px #ffffff;
}

.star.cyan {
    background: #00ffff;
    color: #00ffff;
    box-shadow: 0 0 8px #00ffff;
}

.star.blue {
    background: #0088ff;
    color: #0088ff;
    box-shadow: 0 0 8px #0088ff;
}

.star.silver {
    background: #c0c0c0;
    color: #c0c0c0;
    box-shadow: 0 0 6px #c0c0c0;
}

.star-layer-1 .star {
    width: 2px;
    height: 2px;
    opacity: 0.4;
    animation: moveStarsUp 40s linear infinite;
}

.star-layer-2 .star {
    width: 3px;
    height: 3px;
    opacity: 0.6;
    animation: moveStarsUp 25s linear infinite;
}

.star-layer-3 .star {
    width: 4px;
    height: 4px;
    opacity: 0.8;
    animation: moveStarsUp 15s linear infinite;
}

/* Visual Styles for Elements */
.leaderboard-card {
    background: var(--gaming-card);
    border: 1px solid var(--gaming-border);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.leaderboard-card:hover {
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4), 0 0 30px rgba(0, 255, 255, 0.2);
}

.leaderboard-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 6px;
    right: 6px;
    height: 2px;
    border-radius: 15px 15px 0 0;
}

.card-title {
    color: var(--gaming-text);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.leaderboard-table th {
    background: rgba(0, 255, 255, 0.1);
    color: var(--gaming-primary);
    border-bottom: 2px solid var(--gaming-border);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.leaderboard-table td {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.leaderboard-table tbody tr:hover {
    background: rgba(0, 255, 255, 0.05);
    box-shadow: inset 0 0 20px rgba(0, 255, 255, 0.1), 0 0 15px rgba(0, 255, 255, 0.2);
}

.rank-1 {
    background: linear-gradient(45deg, #ffd700, #ffed4e);
    color: var(--gaming-bg);
    box-shadow: var(--gaming-glow) #ffd700;
    animation: rankPulse 2s ease-in-out infinite;
}

.rank-2 {
    background: linear-gradient(45deg, #c0c0c0, #e5e5e5);
    color: var(--gaming-bg);
}

.rank-3 {
    background: linear-gradient(45deg, #cd7f32, #daa520);
    color: var(--gaming-bg);
}

.rank-other {
    background: rgba(0, 255, 255, 0.2);
    color: var(--gaming-primary);
    border: 1px solid var(--gaming-primary);
}

.player-name {
    color: var(--gaming-text);
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
}

.player-score {
    color: var(--gaming-primary);
    text-shadow: var(--gaming-glow) var(--gaming-primary);
}

.gaming-btn {
    background: linear-gradient(45deg, var(--gaming-primary), var(--gaming-blue));
    color: var(--gaming-bg);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.gaming-btn:hover {
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3), 0 0 20px rgba(255, 255, 255, 0.4);
}

.gaming-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.6s ease;
}

.gaming-btn:hover::before {
    left: 100%;
}



/* Gamer Tabs Theme */
.gamer-tab {
    background: transparent;
    color: #fff;
    font-family: 'Orbitron', 'Segoe UI', Arial, sans-serif;
    letter-spacing: 1px;
}

.gamer-tab .tab-icon {
    filter: drop-shadow(0 0 4px #FFC185);
}

.gamer-tab .tab-glow {
    box-shadow: 0 0 16px 4px #1FB8CD, 0 0 32px 8px #FFC185;
}

.gamer-tab.active,
.gamer-tab:focus-visible {
    background: linear-gradient(90deg, #1FB8CD 0%, #13343B 100%);
    color: #FFC185;
    box-shadow: 0 4px 16px rgba(255, 193, 133, 0.25), 0 0 0 2px #FFC185;
}

.gamer-tab:hover {
    background: linear-gradient(90deg, #FFC185 0%, #1FB8CD 100%);
    color: #13343B;
    box-shadow: 0 6px 24px rgba(31, 184, 205, 0.25);
}

.gamer-tab:active {
    box-shadow: 0 2px 8px rgba(31, 184, 205, 0.15);
}

/* Animations */
@keyframes moveStarsUp {
    0% {
        transform: translateY(120vh);
        opacity: 0;
    }

    10% {
        opacity: var(--star-opacity, 0.6);
    }

    90% {
        opacity: var(--star-opacity, 0.6);
    }

    100% {
        transform: translateY(-20vh);
        opacity: 0;
    }
}


@keyframes rankPulse {

    0%,
    100% {
        transform: scale(1);
        box-shadow: var(--gaming-glow) #ffd700;
    }

    50% {
        transform: scale(1.1);
        box-shadow: 0 0 30px #ffd700;
    }
}

@keyframes badgeFloat {

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

    50% {
        transform: translateY(-5px);
    }
}



@keyframes countUp {
    from {
        transform: scale(1.2);
        opacity: 0;
    }

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

.score-counting {
    animation: countUp 0.5s var(--ease-bounce);
}

/* Fonts */
@font-face {
    font-family: 'FKGroteskNeue';
    src: url('https://r2cdn.perplexity.ai/fonts/FKGroteskNeue.woff2') format('woff2');
}

/* Badge Animation */
.badge {
    animation: badgeFloat 3s ease-in-out infinite;
    display: inline-block;
}