:root {
    --color-bg: #0a0a0f;
    --color-bg-card: rgba(20, 20, 30, 0.6);
    --color-accent: #00d4ff;
    --color-cyan: #00d4ff;
    --color-green: #00ff88;
    --color-yellow: #ffd700;
    --color-orange: #ff8800;
    --color-red: #ff0055;
    --color-text: #ffffff;
    --color-text-secondary: rgba(255, 255, 255, 0.7);
    --color-border: rgba(0, 212, 255, 0.3);

    --font-display: 'Space Grotesk', sans-serif;
    --font-body: 'DM Sans', sans-serif;

    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-body);
    background: var(--color-bg);
    color: var(--color-text);
    overflow-x: hidden;
    min-height: 100vh;
    position: relative;
}

/* Noise Texture Overlay */
.noise-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
    opacity: 0.05;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

/* Gradient Mesh Background */
.gradient-mesh {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    background:
        radial-gradient(circle at 20% 30%, rgba(0, 212, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(255, 0, 85, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(0, 255, 136, 0.1) 0%, transparent 50%);
    animation: gradientShift 15s ease-in-out infinite;
}

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

/* Container */
.container {
    position: relative;
    z-index: 2;
    max-width: 480px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
}

/* Screen Management */
.screen {
    display: none;
    animation: fadeIn 0.5s var(--ease-out-expo);
}

.screen.active {
    display: block;
}

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

/* Staggered Entrance Animation */
.animate-in {
    opacity: 0;
    animation: slideInUp 0.6s var(--ease-out-expo) forwards;
}

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

/* Welcome Screen */
.hero-section {
    text-align: center;
    margin-top: 60px;
    margin-bottom: 60px;
}

.title-gradient {
    font-family: var(--font-display);
    font-size: 52px;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--color-cyan) 0%, var(--color-accent) 50%, var(--color-green) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 40px rgba(0, 212, 255, 0.3);
    margin-bottom: 16px;
}

.subtitle {
    font-size: 18px;
    color: var(--color-text-secondary);
    font-weight: 400;
}

/* Feature Cards */
.features {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 40px;
}

.feature-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background: var(--color-bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    transition: all 0.3s var(--ease-out-expo);
}

.feature-card:hover {
    transform: translateY(-2px);
    border-color: var(--color-accent);
    box-shadow: 0 8px 32px rgba(0, 212, 255, 0.2);
}

.feature-icon {
    font-size: 32px;
    min-width: 40px;
    text-align: center;
}

.feature-text h3 {
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 4px;
}

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

/* Buttons */
.btn-primary {
    width: 100%;
    min-height: 56px;
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 0.05em;
    background: var(--color-accent);
    color: var(--color-bg);
    border: none;
    border-radius: 16px;
    cursor: pointer;
    transition: all 0.3s var(--ease-out-expo);
    box-shadow: 0 8px 32px rgba(0, 212, 255, 0.4);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-primary:active::before {
    width: 300px;
    height: 300px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 48px rgba(0, 212, 255, 0.6);
}

.btn-primary.pulse {
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 8px 32px rgba(0, 212, 255, 0.4); }
    50% { box-shadow: 0 12px 48px rgba(0, 212, 255, 0.8); }
}

.btn-secondary {
    flex: 1;
    min-height: 48px;
    font-family: var(--font-body);
    font-size: 14px;
    font-weight: 500;
    background: var(--color-bg-card);
    backdrop-filter: blur(20px);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s var(--ease-out-expo);
}

.btn-secondary:hover {
    border-color: var(--color-accent);
    background: rgba(0, 212, 255, 0.1);
    transform: translateY(-2px);
}

.btn-text {
    background: none;
    border: none;
    color: var(--color-text-secondary);
    font-family: var(--font-body);
    font-size: 14px;
    cursor: pointer;
    padding: 12px;
    transition: color 0.3s;
}

.btn-text:hover {
    color: var(--color-accent);
}

.btn-back {
    background: var(--color-bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: 14px;
    padding: 8px 16px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s var(--ease-out-expo);
}

.btn-back:hover {
    border-color: var(--color-accent);
    transform: translateX(-2px);
}

.nav-buttons {
    display: flex;
    gap: 12px;
    margin-top: 16px;
}

/* Quiz Screen */
.quiz-header {
    margin-bottom: 40px;
}

.progress-container {
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 12px;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--color-cyan), var(--color-green));
    border-radius: 8px;
    width: 0%;
    transition: width 0.4s var(--ease-out-expo);
    box-shadow: 0 0 20px var(--color-cyan);
}

.question-counter {
    font-family: var(--font-display);
    font-size: 14px;
    font-weight: 700;
    color: var(--color-accent);
    text-align: center;
}

.question-card {
    background: var(--color-bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--color-border);
    border-radius: 24px;
    padding: 32px 24px;
    animation: slideInUp 0.5s var(--ease-out-expo);
}

.question-text {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 32px;
    text-align: center;
}

.options {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.option-btn {
    width: 100%;
    min-height: 56px;
    padding: 16px 20px;
    font-family: var(--font-body);
    font-size: 16px;
    font-weight: 500;
    text-align: left;
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-text);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s var(--ease-out-expo);
}

.option-btn:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--color-accent);
    transform: translateX(4px);
}

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

/* Results Screen */
.results-content {
    text-align: center;
    padding-top: 40px;
}

.results-title {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 800;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: 40px;
}

.gauge-container {
    position: relative;
    max-width: 280px;
    margin: 0 auto 40px;
}

.gauge-svg {
    width: 100%;
    height: auto;
    filter: drop-shadow(0 8px 24px rgba(0, 212, 255, 0.4));
}

.gauge-score {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -10%);
    font-family: var(--font-display);
    font-size: 64px;
    font-weight: 800;
    color: var(--color-accent);
    text-shadow: 0 0 40px currentColor;
}

.score-label {
    font-family: var(--font-display);
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 12px;
}

.score-message {
    font-size: 18px;
    color: var(--color-text-secondary);
    margin-bottom: 24px;
    line-height: 1.5;
}

.comparison {
    display: inline-block;
    padding: 12px 24px;
    background: var(--color-bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--color-border);
    border-radius: 24px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-accent);
    margin-bottom: 40px;
}

.results-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 24px;
}

/* Global Screen */
.screen-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 32px;
}

.screen-title {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 800;
    letter-spacing: 0.05em;
    flex: 1;
}

.global-gauge-container {
    background: var(--color-bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--color-border);
    border-radius: 24px;
    padding: 32px 24px;
    text-align: center;
    margin-bottom: 24px;
}

.global-score-label {
    font-size: 14px;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 16px;
}

.global-score {
    font-family: var(--font-display);
    font-size: 72px;
    font-weight: 800;
    color: var(--color-orange);
    text-shadow: 0 0 40px currentColor;
    margin-bottom: 16px;
}

.global-gauge {
    height: 24px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 16px;
}

.global-gauge-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-green), var(--color-yellow), var(--color-orange));
    border-radius: 12px;
    width: 67%;
    transition: width 1s var(--ease-out-expo);
    box-shadow: 0 0 20px var(--color-orange);
}

.global-status {
    font-size: 18px;
    font-weight: 500;
}

/* Distribution */
.distribution {
    background: var(--color-bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--color-border);
    border-radius: 24px;
    padding: 24px;
    margin-bottom: 24px;
}

.distribution h3 {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 20px;
}

.distribution-bars {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.dist-bar {
    display: grid;
    grid-template-columns: 120px 1fr 50px;
    gap: 12px;
    align-items: center;
}

.dist-label {
    font-size: 14px;
    font-weight: 500;
}

.dist-bar-bg {
    height: 24px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    overflow: hidden;
}

.dist-bar-fill {
    height: 100%;
    border-radius: 12px;
    transition: width 1s var(--ease-out-expo);
    animation: barGrow 1s var(--ease-out-expo);
}

@keyframes barGrow {
    from { width: 0 !important; }
}

.dist-value {
    font-family: var(--font-display);
    font-size: 14px;
    font-weight: 700;
    text-align: right;
}

.global-commentary {
    background: var(--color-bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    padding: 20px;
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text-secondary);
}

/* Leaderboard */
.leaderboard-subtitle {
    text-align: center;
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: 24px;
}

.leaderboard-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.leaderboard-item {
    display: grid;
    grid-template-columns: 40px 1fr 60px;
    gap: 16px;
    align-items: center;
    padding: 16px 20px;
    background: var(--color-bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    transition: all 0.3s var(--ease-out-expo);
    animation: slideInUp 0.5s var(--ease-out-expo) backwards;
}

.leaderboard-item.top-1 {
    border-color: rgba(255, 215, 0, 0.6);
    box-shadow: 0 8px 32px rgba(255, 215, 0, 0.2);
}

.leaderboard-item.top-2 {
    border-color: rgba(192, 192, 192, 0.6);
    box-shadow: 0 8px 32px rgba(192, 192, 192, 0.2);
}

.leaderboard-item.top-3 {
    border-color: rgba(205, 127, 50, 0.6);
    box-shadow: 0 8px 32px rgba(205, 127, 50, 0.2);
}

.leaderboard-item.current-user {
    border-color: var(--color-accent);
    box-shadow: 0 8px 32px rgba(0, 212, 255, 0.3);
}

.leaderboard-rank {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 800;
    text-align: center;
}

.leaderboard-name {
    font-size: 16px;
    font-weight: 500;
}

.leaderboard-score {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 700;
    text-align: right;
    color: var(--color-cyan);
}

/* Premium Lock */
.premium-lock {
    text-align: center;
    padding: 60px 24px;
}

.lock-icon {
    font-size: 64px;
    margin-bottom: 24px;
}

.premium-lock h3 {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
}

.premium-lock p {
    font-size: 16px;
    color: var(--color-text-secondary);
    margin-bottom: 32px;
    line-height: 1.6;
}

.premium-features {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 32px;
    text-align: left;
}

.premium-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 16px;
}

.premium-feature::before {
    content: '✨';
    font-size: 20px;
}

.price-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(255, 215, 0, 0.1);
    border: 1px solid rgba(255, 215, 0, 0.3);
    border-radius: 8px;
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 700;
    color: #ffd700;
    margin-bottom: 24px;
}

/* History Content */
.history-content {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.history-chart {
    background: var(--color-bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--color-border);
    border-radius: 24px;
    padding: 24px;
}

.history-chart h3 {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 16px;
}

/* Responsive */
@media (max-width: 375px) {
    .title-gradient {
        font-size: 44px;
    }

    .gauge-score {
        font-size: 52px;
    }
}

/* Loading State */
@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}