/* === Reset & Base === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg: #0a0a0f;
    --bg-card: #111118;
    --bg-card-hover: #16161f;
    --accent: #00d4aa;
    --accent-dim: #00a88a;
    --accent-glow: rgba(0, 212, 170, 0.15);
    --text: #e0e0e8;
    --text-dim: #888899;
    --text-bright: #ffffff;
    --border: #1e1e2a;
    --radius: 8px;
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

section { padding: 100px 0; }

h2 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2.2rem;
    font-weight: 600;
    color: var(--text-bright);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-intro {
    color: var(--text-dim);
    max-width: 680px;
    margin-bottom: 48px;
    font-size: 1.05rem;
}

/* === Hero === */
#hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0;
    position: relative;
    overflow: hidden;
}

#hero::before {
    content: '';
    position: absolute;
    top: 50%; left: 50%;
    width: 600px; height: 600px;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    pointer-events: none;
}

.hero-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(5rem, 15vw, 12rem);
    font-weight: 700;
    color: var(--text-bright);
    letter-spacing: -0.04em;
    line-height: 1;
    margin-bottom: 24px;
}

.hero-tagline {
    font-size: clamp(1.1rem, 2.5vw, 1.4rem);
    color: var(--text-dim);
    max-width: 500px;
    margin: 0 auto 40px;
    font-weight: 300;
}

.cta-btn {
    display: inline-block;
    padding: 14px 36px;
    background: var(--accent);
    color: var(--bg);
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
    letter-spacing: 0.02em;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.cta-btn:hover { background: var(--accent-dim); transform: translateY(-1px); }

.cta-btn-outline {
    background: transparent;
    border: 1px solid var(--accent);
    color: var(--accent);
}
.cta-btn-outline:hover { background: var(--accent-glow); }

.hero-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

/* === Two Column === */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; margin-top: 32px; }
.two-col p { margin-bottom: 16px; color: var(--text-dim); }

/* === How It Works Flow === */
.flow-diagram {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin: 48px 0 32px;
    overflow-x: auto;
    padding-bottom: 16px;
}

.flow-step {
    flex: 1;
    min-width: 140px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px 16px;
    text-align: center;
}

.flow-step.accent { border-color: var(--accent); background: var(--accent-glow); }

.flow-icon { font-size: 1.8rem; margin-bottom: 8px; }
.flow-label { font-weight: 600; color: var(--text-bright); margin-bottom: 4px; font-size: 0.9rem; }
.flow-desc { font-size: 0.8rem; color: var(--text-dim); }

.flow-arrow {
    color: var(--accent);
    font-size: 1.5rem;
    padding-top: 28px;
    flex-shrink: 0;
}

.how-note {
    color: var(--text-dim);
    font-style: italic;
    max-width: 700px;
    font-size: 0.95rem;
}

/* === Demo Cards === */
.demos-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }

.demo-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    transition: border-color 0.2s;
}

.demo-card:hover { border-color: var(--accent); }

.demo-card h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.1rem;
    color: var(--text-bright);
    margin-bottom: 8px;
}

.demo-desc { font-size: 0.85rem; color: var(--text-dim); margin-bottom: 20px; }

.player-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
}

.player-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    width: 52px;
    flex-shrink: 0;
}

.custom-player {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
}

.play-btn {
    width: 44px; height: 44px;
    border-radius: 50%;
    border: 1px solid var(--accent);
    background: transparent;
    color: var(--accent);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    flex-shrink: 0;
    transition: background 0.2s;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.play-btn:hover { background: var(--accent-glow); }
.play-btn.playing { background: var(--accent); color: var(--bg); }

.progress-bar {
    flex: 1;
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    cursor: pointer;
    position: relative;
}

.progress-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 2px;
    width: 0%;
    transition: width 0.1s linear;
}

.time { font-size: 0.75rem; color: var(--text-dim); width: 36px; text-align: right; flex-shrink: 0; }

/* === Node Explorer === */
.node-reference {
    margin-bottom: 32px;
    border-color: var(--accent);
    background: var(--accent-glow);
}

.node-explorer-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 32px;
}

.node-card { position: relative; padding-top: 40px; }

.node-badge {
    position: absolute;
    top: 12px;
    right: 16px;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 3px 10px;
    border-radius: 20px;
    color: var(--bg);
}

.node-2 .node-badge { background: #00d4aa; }
.node-3 .node-badge { background: #00aaff; }
.node-4 .node-badge { background: #aa66ff; }
.node-5 .node-badge { background: #ff6644; }
.node-6 .node-badge { background: #ffaa00; }

.node-2:hover { border-color: #00d4aa; }
.node-3:hover { border-color: #00aaff; }
.node-4:hover { border-color: #aa66ff; }
.node-5:hover { border-color: #ff6644; }
.node-6:hover { border-color: #ffaa00; }

.demo-effect {
    font-size: 0.82rem;
    color: var(--text-dim);
    margin-bottom: 16px;
    line-height: 1.5;
}

.effect-tag {
    display: inline-block;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    font-size: 0.72rem;
    color: var(--accent);
    background: var(--accent-glow);
    padding: 2px 8px;
    border-radius: 4px;
    margin-right: 6px;
    letter-spacing: 0.04em;
}

.bonus-heading {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.3rem;
    color: var(--text-bright);
    margin-top: 48px;
    margin-bottom: 8px;
}

/* === Spectrograms === */
#spectrograms { background: var(--bg-card); }
.spectro-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 24px; }

.spectro-card {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--bg);
}

.spectro-card img { width: 100%; display: block; }
.spectro-card p { padding: 16px; font-size: 0.85rem; color: var(--text-dim); }

/* === Effects Grid === */
.effects-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 40px; }

.effect-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    transition: border-color 0.2s, transform 0.2s;
}

.effect-item:hover { border-color: var(--accent); transform: translateY(-2px); }

.effect-name {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    color: var(--text-bright);
    margin-bottom: 6px;
    font-size: 0.95rem;
}

.effect-desc { font-size: 0.8rem; color: var(--text-dim); }

/* === Audience Grid === */
.audience-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 40px; }

.audience-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
}

.audience-card h3 {
    font-family: 'Space Grotesk', sans-serif;
    color: var(--accent);
    margin-bottom: 10px;
    font-size: 1rem;
}

.audience-card p { font-size: 0.85rem; color: var(--text-dim); }

/* === Patent === */
#patent { text-align: center; padding: 60px 0; }
#patent p { color: var(--text-dim); max-width: 600px; margin: 0 auto; }

/* === Contact === */
#contact { text-align: center; }

.contact-form {
    max-width: 560px;
    margin: 0 auto;
    text-align: left;
}

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    transition: border-color 0.2s;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--accent);
}

.contact-form textarea { margin-bottom: 16px; resize: vertical; }
.contact-form .cta-btn { width: 100%; text-align: center; }

/* === Footer === */
footer {
    text-align: center;
    padding: 40px 0;
    border-top: 1px solid var(--border);
}

footer p { color: var(--text-dim); font-size: 0.85rem; }

/* === Medley Replay Button === */
.medley-btn {
    display: inline-block;
    padding: 12px 24px;
    background: transparent;
    border: 1px solid var(--accent);
    color: var(--accent);
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 0.85rem;
    border-radius: var(--radius);
    cursor: pointer;
    margin-bottom: 32px;
    transition: background 0.2s, color 0.2s;
    letter-spacing: 0.02em;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.medley-btn:hover {
    background: var(--accent);
    color: var(--bg);
}

/* === Medley Player Bar === */
.medley-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 20px;
    background: #0d0d14;
    border-top: 1px solid var(--border);
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.medley-bar.hidden {
    transform: translateY(100%);
    opacity: 0;
    pointer-events: none;
}

.medley-bar-play {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--accent);
    background: transparent;
    color: var(--accent);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    flex-shrink: 0;
    transition: background 0.2s;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.medley-bar-play:hover {
    background: var(--accent-glow);
}

.medley-bar-progress {
    flex: 1;
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    cursor: pointer;
    min-width: 60px;
}

.medley-bar-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 2px;
    width: 0%;
    transition: width 0.1s linear;
}

.medley-bar-time {
    font-size: 0.75rem;
    color: var(--text-dim);
    flex-shrink: 0;
    min-width: 70px;
}

.medley-bar-label {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-bright);
    flex-shrink: 0;
}

.medley-bar-link {
    font-size: 0.8rem;
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    flex-shrink: 0;
    white-space: nowrap;
    transition: color 0.2s;
}

.medley-bar-link:hover {
    color: var(--accent-dim);
}

.medley-bar-close {
    background: none;
    border: none;
    color: var(--text-dim);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 4px 8px;
    flex-shrink: 0;
    transition: color 0.2s;
}

.medley-bar-close:hover {
    color: var(--text-bright);
}

/* === Responsive === */
@media (max-width: 900px) {
    .two-col { grid-template-columns: 1fr; gap: 24px; }
    .demos-grid { grid-template-columns: 1fr; }
    .node-explorer-grid { grid-template-columns: 1fr; }
    .spectro-grid { grid-template-columns: 1fr; }
    .effects-grid { grid-template-columns: 1fr 1fr; }
    .audience-grid { grid-template-columns: 1fr 1fr; }
    .flow-diagram { flex-wrap: wrap; justify-content: center; }
    .flow-arrow { display: none; }
}

@media (max-width: 600px) {
    section { padding: 64px 0; }
    h2 { font-size: 1.6rem; }
    .effects-grid { grid-template-columns: 1fr; }
    .audience-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .progress-bar { height: 8px; }
    .progress-fill { height: 100%; }
    .medley-bar { flex-wrap: wrap; gap: 8px; padding: 8px 12px; }
    .medley-bar-label { display: none; }
    .medley-bar-link { font-size: 0.7rem; }
    .medley-bar-progress { order: 10; width: 100%; flex-basis: 100%; height: 8px; }
    .medley-bar-fill { height: 100%; }
    .hero-buttons { flex-direction: column; align-items: center; }
    .hero-buttons .cta-btn { width: 100%; max-width: 280px; text-align: center; }
}