/* === PsycheMap Shared Design System === */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --bg-deep: #0a0a12;
    --bg-card: #12121e;
    --bg-elevated: #1a1a2e;
    --accent-primary: #c8a2f8;
    --accent-warm: #f0c27a;
    --accent-teal: #64d8cb;
    --accent-red: #f87171;
    --accent-green: #4ade80;
    --text-primary: #e8e6f0;
    --text-secondary: #9896a8;
    --text-muted: #5e5c6e;
    --border: rgba(200, 162, 248, 0.08);
}

html { scroll-behavior: smooth; }

body {
    font-family: 'DM Sans', sans-serif;
    background: var(--bg-deep);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

/* === GRAIN OVERLAY === */
body::before {
    content: '';
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 9999;
}

/* === NAVIGATION === */
nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
    background: rgba(10, 10, 18, 0.7);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

nav a { text-decoration: none; }

.logo {
    font-family: 'Syne', sans-serif;
    font-weight: 800;
    font-size: 1.3rem;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.logo span { color: var(--accent-primary); }

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-link {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-decoration: none;
    letter-spacing: 0.05em;
    transition: color 0.2s;
}

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

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

/* === PAGE WRAPPER === */
.page {
    max-width: 900px;
    margin: 0 auto;
    padding: 8rem 2rem 4rem;
    min-height: 100vh;
}

/* === EXPERIMENT HEADER === */
.exp-header {
    margin-bottom: 3rem;
}

.exp-header .back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-muted);
    text-decoration: none;
    margin-bottom: 2rem;
    transition: color 0.2s;
}

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

.exp-header .tag {
    display: inline-block;
    font-size: 0.7rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    padding: 0.4rem 1rem;
    border-radius: 100px;
    margin-bottom: 1.2rem;
}

.tag.bias { border: 1px solid rgba(240, 194, 122, 0.25); color: var(--accent-warm); }
.tag.cognitive { border: 1px solid rgba(200, 162, 248, 0.25); color: var(--accent-primary); }
.tag.social { border: 1px solid rgba(100, 216, 203, 0.25); color: var(--accent-teal); }

.exp-header h1 {
    font-family: 'Syne', sans-serif;
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 1rem;
}

.exp-header h1 .highlight {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-warm));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.exp-header .subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    line-height: 1.7;
}

/* === PROGRESS BAR === */
.progress-bar {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 3rem;
}

.progress-step {
    flex: 1;
    height: 3px;
    background: var(--bg-elevated);
    border-radius: 2px;
    transition: background 0.5s ease;
}

.progress-step.active {
    background: var(--accent-primary);
}

.progress-step.completed {
    background: var(--accent-teal);
}

/* === EXPERIMENT CARD === */
.experiment-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 3rem;
    position: relative;
    overflow: hidden;
}

.experiment-card .phase {
    display: none;
    animation: fadeIn 0.5s ease;
}

.experiment-card .phase.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* === PHASE TITLES === */
.phase-label {
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--accent-primary);
    margin-bottom: 0.8rem;
}

.phase-title {
    font-family: 'Syne', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
}

.phase-text {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 2rem;
    line-height: 1.7;
}

/* === BUTTONS === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.9rem 2rem;
    border-radius: 8px;
    font-family: 'DM Sans', sans-serif;
    font-size: 0.95rem;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.btn-primary {
    background: var(--accent-primary);
    color: var(--bg-deep);
}

.btn-primary:hover {
    background: #d4b4ff;
    transform: translateY(-1px);
}

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

.btn-secondary:hover {
    background: #222240;
    border-color: rgba(200, 162, 248, 0.2);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    padding: 0.6rem 1.2rem;
}

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

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none !important;
}

/* === INPUTS === */
.input {
    width: 100%;
    padding: 0.9rem 1.2rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: 'DM Sans', sans-serif;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s;
}

.input:focus {
    border-color: rgba(200, 162, 248, 0.3);
}

.input::placeholder {
    color: var(--text-muted);
}

/* === SLIDER === */
.slider-container {
    position: relative;
    padding: 1.5rem 0;
}

.slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 4px;
    background: var(--bg-elevated);
    border-radius: 2px;
    outline: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--accent-primary);
    cursor: pointer;
    box-shadow: 0 0 20px rgba(200, 162, 248, 0.3);
    transition: transform 0.15s;
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

.slider::-moz-range-thumb {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--accent-primary);
    cursor: pointer;
    border: none;
    box-shadow: 0 0 20px rgba(200, 162, 248, 0.3);
}

.slider-value {
    text-align: center;
    font-family: 'Syne', sans-serif;
    font-size: 3rem;
    font-weight: 800;
    margin-top: 1rem;
    letter-spacing: -0.02em;
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

/* === RESULT CARDS === */
.result-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1rem;
}

.result-label {
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.result-value {
    font-family: 'Syne', sans-serif;
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.result-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

/* === INSIGHT BOX === */
.insight-box {
    background: rgba(200, 162, 248, 0.05);
    border: 1px solid rgba(200, 162, 248, 0.15);
    border-radius: 12px;
    padding: 1.5rem;
    margin-top: 1.5rem;
}

.insight-box h4 {
    font-family: 'Syne', sans-serif;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: 0.6rem;
    letter-spacing: 0.03em;
}

.insight-box p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* === BAR CHART === */
.bar-chart {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin: 1.5rem 0;
}

.bar-row {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.bar-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    width: 120px;
    flex-shrink: 0;
    text-align: right;
}

.bar-track {
    flex: 1;
    height: 32px;
    background: var(--bg-elevated);
    border-radius: 6px;
    overflow: hidden;
    position: relative;
}

.bar-fill {
    height: 100%;
    border-radius: 6px;
    transition: width 1s ease;
    display: flex;
    align-items: center;
    padding: 0 0.8rem;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--bg-deep);
    white-space: nowrap;
}

.bar-fill.primary { background: var(--accent-primary); }
.bar-fill.warm { background: var(--accent-warm); }
.bar-fill.teal { background: var(--accent-teal); }
.bar-fill.red { background: var(--accent-red); }

/* === FOOTER === */
footer {
    padding: 3rem 2rem;
    text-align: center;
    border-top: 1px solid var(--border);
    margin-top: 4rem;
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-logo {
    font-family: 'Syne', sans-serif;
    font-weight: 800;
    font-size: 1rem;
    color: var(--text-muted);
}

.footer-logo span { color: var(--accent-primary); opacity: 0.6; }

.footer-note {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* === ANIMATIONS === */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

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

@keyframes countUp {
    from { opacity: 0; transform: scale(0.8); }
    to { opacity: 1; transform: scale(1); }
}

.animate-in {
    animation: slideUp 0.6s ease forwards;
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
    nav { padding: 1rem 1.5rem; }
    .page { padding: 6rem 1.5rem 3rem; }
    .experiment-card { padding: 2rem 1.5rem; }
    .result-grid { grid-template-columns: 1fr; }
    .bar-label { width: 80px; font-size: 0.75rem; }
    .footer-inner { flex-direction: column; gap: 0.8rem; }
    .nav-links { gap: 1rem; }
}

@media (max-width: 480px) {
    .experiment-card { padding: 1.5rem 1rem; }
    .slider-value { font-size: 2.2rem; }
    .result-value { font-size: 1.6rem; }
}