/* === Dopamine Type Test - Dark Mode First === */
:root {
    --primary: #f59e0b;
    --primary-light: #fbbf24;
    --primary-dark: #d97706;
    --primary-glow: rgba(245, 158, 11, 0.3);
    --bg: #0a0a1a;
    --bg-card: rgba(255, 255, 255, 0.05);
    --text: #f1f5f9;
    --text-muted: #94a3b8;
    --border: rgba(255, 255, 255, 0.1);
    --glass-bg: rgba(255, 255, 255, 0.04);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-blur: blur(20px);
}

/* Light mode overrides */
[data-theme="light"] {
    --bg: #f8f9fc;
    --bg-card: rgba(0, 0, 0, 0.03);
    --text: #1a1a2e;
    --text-muted: #64748b;
    --border: rgba(0, 0, 0, 0.1);
    --glass-bg: rgba(255, 255, 255, 0.6);
    --glass-border: rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .app-loader { background: #f8f9fc; }
[data-theme="light"] .loader-spinner { border-color: rgba(245, 158, 11, 0.15); border-top-color: var(--primary); }
[data-theme="light"] .option-btn { background: rgba(0, 0, 0, 0.03); border-color: rgba(0, 0, 0, 0.1); color: var(--text); }
[data-theme="light"] .option-btn:hover { background: rgba(245, 158, 11, 0.06); border-color: rgba(245, 158, 11, 0.3); }
[data-theme="light"] .option-btn.selected { background: rgba(245, 158, 11, 0.1); border-color: var(--primary); }
[data-theme="light"] .metrics-section { background: rgba(0, 0, 0, 0.02); border-color: rgba(0, 0, 0, 0.08); }
[data-theme="light"] .metric-bar-bg { background: rgba(0, 0, 0, 0.06); }
[data-theme="light"] .share-section { background: rgba(0, 0, 0, 0.02); border-color: rgba(0, 0, 0, 0.08); }
[data-theme="light"] .share-btn { background: rgba(0, 0, 0, 0.03); border-color: rgba(0, 0, 0, 0.1); }
[data-theme="light"] .lang-menu { background: rgba(248, 249, 252, 0.98); border-color: rgba(0, 0, 0, 0.1); box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12); }
[data-theme="light"] .lang-option:hover { background: rgba(245, 158, 11, 0.06); }
[data-theme="light"] .social-proof { background: rgba(0, 0, 0, 0.03); border-color: rgba(0, 0, 0, 0.08); }
[data-theme="light"] .time-badge { background: rgba(0, 0, 0, 0.03); border-color: rgba(0, 0, 0, 0.08); }
[data-theme="light"] .ad-container { background: rgba(0, 0, 0, 0.02); }
[data-theme="light"] .analyze-step { background: rgba(0, 0, 0, 0.02); border-color: rgba(0, 0, 0, 0.08); }
[data-theme="light"] .result-description { color: var(--text-muted); }
[data-theme="light"] .brain-half { stroke: var(--primary-dark) !important; }

/* === Reset === */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

button, a, [role="button"] {
    touch-action: manipulation;
    -webkit-user-select: none;
    user-select: none;
}

html { font-size: 16px; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.3s, color 0.3s;
}

/* === App Loader === */
.app-loader {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    background: var(--bg);
    transition: opacity 0.4s ease;
}

.app-loader.hidden {
    opacity: 0;
    pointer-events: none;
}

.loader-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(245, 158, 11, 0.2);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

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

/* === Skip Link === */
.skip-link {
    position: absolute;
    top: -100%;
    left: 16px;
    z-index: 10001;
    padding: 8px 16px;
    background: var(--primary);
    color: #000;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
}

.skip-link:focus {
    top: 16px;
}

/* === App Container === */
.app-container {
    max-width: 480px;
    margin: 0 auto;
    padding: 16px;
    min-height: 100vh;
    position: relative;
}

/* === Theme Toggle === */
.theme-toggle {
    position: fixed;
    top: 16px;
    right: 16px;
    z-index: 100;
    width: 44px;
    height: 44px;
    border: 1px solid var(--glass-border);
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-radius: 12px;
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s;
}

.theme-toggle:hover { transform: scale(1.1); }

/* === Language Selector === */
.language-selector {
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 100;
}

.lang-toggle {
    width: 44px;
    height: 44px;
    border: 1px solid var(--glass-border);
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-radius: 12px;
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s;
}

.lang-toggle:hover { transform: scale(1.1); }

.lang-menu {
    position: absolute;
    top: 52px;
    left: 0;
    background: rgba(15, 15, 30, 0.98);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 8px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4px;
    min-width: 240px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
}

.lang-menu.hidden { display: none; }

.lang-option {
    padding: 8px 12px;
    background: transparent;
    border: none;
    border-radius: 8px;
    color: var(--text);
    font-size: 13px;
    cursor: pointer;
    text-align: left;
    min-height: 44px;
    display: flex;
    align-items: center;
    transition: background 0.2s;
}

.lang-option:hover { background: rgba(245, 158, 11, 0.1); }
.lang-option.active { background: rgba(245, 158, 11, 0.15); font-weight: 600; }

/* === Ad Container === */
.ad-container {
    margin: 12px 0;
    min-height: 50px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 8px;
    overflow: hidden;
}

/* === Screens === */
.screen {
    display: none;
    animation: fadeIn 0.4s ease;
}

.screen.active { display: block; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

/* === START SCREEN === */
.start-content {
    text-align: center;
    padding: 60px 0 20px;
}

/* Brain Hero SVG */
.hero-icon {
    margin: 0 auto 24px;
    width: 180px;
    height: 180px;
}

.brain-svg {
    width: 100%;
    height: 100%;
}

/* Brain animations */
.brain-half {
    animation: brainPulse 3s ease infinite;
}

.brain-right {
    animation-delay: 1.5s;
}

@keyframes brainPulse {
    0%, 100% { opacity: 0.8; }
    50% { opacity: 1; }
}

.brain-fold {
    animation: foldShimmer 4s ease infinite;
}

.bf1, .bf3 { animation-delay: 0s; }
.bf2, .bf4 { animation-delay: 2s; }

@keyframes foldShimmer {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.6; }
}

.dopamine-spark {
    animation: sparkPulse 2s ease infinite;
}

.ds1 { animation-delay: 0s; }
.ds2 { animation-delay: 0.4s; }
.ds3 { animation-delay: 0.8s; }
.ds4 { animation-delay: 1.2s; }
.ds5 { animation-delay: 1.6s; }

@keyframes sparkPulse {
    0%, 100% { opacity: 0.3; r: 2.5; }
    50% { opacity: 1; r: 4.5; }
}

.neuron-line {
    animation: neuronFlow 3s ease infinite;
}

.nl1, .nl3, .nl5 { animation-delay: 0s; }
.nl2, .nl4, .nl6 { animation-delay: 1.5s; }

@keyframes neuronFlow {
    0%, 100% { opacity: 0.2; }
    50% { opacity: 0.6; }
}

.synapse-dot {
    animation: synapsePulse 2.5s ease infinite;
}

.sd1, .sd3, .sd5 { animation-delay: 0.3s; }
.sd2, .sd4, .sd6 { animation-delay: 1.2s; }

@keyframes synapsePulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.8; }
}

/* Social proof */
.social-proof {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    margin-bottom: 20px;
}

.proof-count {
    font-size: 16px;
    font-weight: 700;
    color: var(--primary);
}

.proof-text {
    font-size: 13px;
    color: var(--text-muted);
}

/* Start title */
.start-title {
    font-size: 28px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
    line-height: 1.3;
}

.start-subtitle {
    font-size: 16px;
    color: var(--text-muted);
    margin-bottom: 24px;
    line-height: 1.5;
}

/* Time badge */
.time-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 18px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 28px;
}

.time-dot {
    width: 4px;
    height: 4px;
    background: var(--primary);
    border-radius: 50%;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 52px;
    padding: 14px 32px;
    border: none;
    border-radius: 16px;
    font-size: 17px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
    max-width: 320px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #000;
    box-shadow: 0 4px 20px var(--primary-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 28px rgba(245, 158, 11, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-glow {
    animation: btnGlow 2s ease infinite;
}

@keyframes btnGlow {
    0%, 100% { box-shadow: 0 4px 20px var(--primary-glow); }
    50% { box-shadow: 0 4px 32px rgba(245, 158, 11, 0.5); }
}

.btn-secondary {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text);
    margin-top: 16px;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.08);
}

/* === QUESTION SCREEN === */
.question-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 32px;
    padding-top: 52px;
}

.progress-bar {
    flex: 1;
    height: 6px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    border-radius: 3px;
    transition: width 0.4s ease;
    width: 0%;
}

.question-counter {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-muted);
    white-space: nowrap;
}

.question-body {
    text-align: center;
    padding-bottom: 20px;
}

.question-text {
    font-size: 20px;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 28px;
    min-height: 60px;
}

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

.option-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    min-height: 56px;
    padding: 14px 18px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 14px;
    color: var(--text);
    font-size: 15px;
    font-weight: 500;
    text-align: left;
    cursor: pointer;
    transition: all 0.25s ease;
    position: relative;
    overflow: hidden;
}

.option-btn:hover {
    background: rgba(245, 158, 11, 0.08);
    border-color: rgba(245, 158, 11, 0.3);
    transform: translateX(4px);
}

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

.option-btn.selected {
    background: rgba(245, 158, 11, 0.15);
    border-color: var(--primary);
    box-shadow: 0 0 16px var(--primary-glow);
}

.option-label {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(245, 158, 11, 0.15);
    border-radius: 8px;
    font-size: 13px;
    font-weight: 700;
    color: var(--primary);
    flex-shrink: 0;
}

.option-text {
    flex: 1;
}

/* === ANALYZING SCREEN === */
.analyzing-content {
    text-align: center;
    padding: 80px 0;
}

.brain-scan-visual {
    width: 160px;
    height: 160px;
    margin: 0 auto 32px;
}

.scan-svg { width: 100%; height: 100%; }

.scan-ring {
    transform-origin: center;
}

.ring1 { animation: ringRotate 6s linear infinite; }
.ring2 { animation: ringRotate 4s linear infinite reverse; }
.ring3 { animation: ringRotate 3s linear infinite; }

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

.analyzing-content h2 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text);
}

.analyzing-steps {
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-width: 280px;
    margin: 0 auto 24px;
}

.analyze-step {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    font-size: 14px;
    color: var(--text-muted);
    opacity: 0.4;
    transition: opacity 0.4s ease;
}

.analyze-step.active {
    opacity: 1;
    border-color: rgba(245, 158, 11, 0.3);
}

.analyze-step.done {
    opacity: 0.7;
}

.step-icon { font-size: 18px; }

.step-text { flex: 1; text-align: left; }

.analyzing-progress {
    max-width: 280px;
    margin: 0 auto;
}

.analyzing-bar {
    height: 6px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 3px;
    overflow: hidden;
}

.analyzing-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    border-radius: 3px;
    width: 0%;
    transition: width 0.3s ease;
}

/* === RESULT SCREEN === */
.result-content {
    padding: 48px 0 20px;
    position: relative;
}

.result-header {
    text-align: center;
    margin-bottom: 28px;
}

.result-badge {
    width: 100px;
    height: 100px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--glass-bg);
    border: 2px solid var(--glass-border);
    border-radius: 28px;
    position: relative;
}

.result-badge::after {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: 32px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    opacity: 0.15;
    z-index: -1;
    animation: badgePulse 2s ease infinite;
}

@keyframes badgePulse {
    0%, 100% { opacity: 0.1; transform: scale(1); }
    50% { opacity: 0.2; transform: scale(1.05); }
}

.result-emoji {
    font-size: 52px;
}

.result-label {
    font-size: 13px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 8px;
}

.result-title {
    font-size: 28px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 12px;
}

.result-description {
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-muted);
    max-width: 360px;
    margin: 0 auto;
}

/* Metrics Section */
.metrics-section {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 20px;
    margin-bottom: 20px;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
}

.metrics-section h3 {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text);
}

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

.metric-row {
    display: flex;
    align-items: center;
    gap: 12px;
}

.metric-label {
    font-size: 13px;
    color: var(--text-muted);
    width: 80px;
    flex-shrink: 0;
}

.metric-bar-bg {
    flex: 1;
    height: 8px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 4px;
    overflow: hidden;
}

.metric-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    border-radius: 4px;
    transition: width 1s ease;
    width: 0%;
}

.metric-value {
    font-size: 13px;
    font-weight: 700;
    color: var(--primary);
    width: 36px;
    text-align: right;
    flex-shrink: 0;
}

/* Share Section */
.share-section {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 20px;
    margin-bottom: 20px;
    text-align: center;
}

.share-section h3 {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 14px;
}

.share-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.share-btn {
    min-height: 44px;
    padding: 10px 14px;
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    background: var(--glass-bg);
    color: var(--text);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.share-btn:hover { transform: translateY(-1px); }
.share-btn.kakao { border-color: rgba(254, 229, 0, 0.3); }
.share-btn.kakao:hover { background: rgba(254, 229, 0, 0.1); }
.share-btn.twitter { border-color: rgba(29, 161, 242, 0.3); }
.share-btn.twitter:hover { background: rgba(29, 161, 242, 0.1); }
.share-btn.facebook { border-color: rgba(24, 119, 242, 0.3); }
.share-btn.facebook:hover { background: rgba(24, 119, 242, 0.1); }
.share-btn.copy { border-color: rgba(245, 158, 11, 0.3); }
.share-btn.copy:hover { background: rgba(245, 158, 11, 0.1); }

/* === Footer === */
.game-footer {
    text-align: center;
    padding: 20px;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s;
}

.back-link:hover { color: var(--primary); }

/* === Responsive === */
@media (max-width: 640px) {
    .start-content {
        padding: 48px 0 16px;
    }

    .hero-icon {
        width: 150px;
        height: 150px;
    }

    .start-title {
        font-size: 24px;
    }

    .start-subtitle {
        font-size: 14px;
    }
}

@media (max-width: 360px) {
    .start-title { font-size: 22px; }
    .result-title { font-size: 24px; }
    .question-text { font-size: 18px; }
    .option-btn { min-height: 48px; padding: 12px 14px; }
}

/* === Confetti === */
.confetti-piece {
    position: absolute;
    top: -10px;
    width: 8px;
    height: 8px;
    border-radius: 2px;
    animation: confettiFall 3s ease forwards;
}

@keyframes confettiFall {
    0% { transform: translateY(0) rotate(0deg); opacity: 1; }
    100% { transform: translateY(100vh) rotate(720deg); opacity: 0; }
}

/* === CTA Pulse === */
@keyframes ctaPulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.5); }
    50% { box-shadow: 0 0 0 12px rgba(245, 158, 11, 0); }
}

#start-btn { animation: ctaPulse 2s ease-in-out 1s 3; }

/* === Reduced Motion === */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}