/* === Samples Page: style.css === */
/* Extends the main site design system */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Space+Grotesk:wght@400;500;600;700&display=swap');

*, *::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, 0.12);
  --text: #e0e0e8;
  --text-dim: #888899;
  --text-bright: #ffffff;
  --border: #1e1e2a;
  --radius: 8px;
  --warn: #ffaa00;
  --warn-glow: rgba(255, 170, 0, 0.1);
  --danger: #ff6644;
}

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;
}

/* === Navigation (from technology page) === */

.tech-nav {
  position: sticky;
  top: 0;
  background: rgba(10,10,15,0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
  padding: 14px 0;
}

.tech-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

.tech-nav-left { display: flex; align-items: baseline; gap: 12px; }

.tech-nav-brand {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  color: var(--text-bright);
  text-decoration: none;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
}

.tech-nav-label {
  font-size: 0.7rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 600;
}

.tech-nav-link {
  font-size: 0.82rem;
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
  font-weight: 500;
}

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

.tech-nav-back {
  font-size: 0.82rem;
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.2s;
}

.tech-nav-back:hover { color: var(--accent); }

/* === Disclosure banner === */

.disclosure-banner {
  background: var(--warn-glow);
  border: 1px solid rgba(255,170,0,0.3);
  border-radius: var(--radius);
  padding: 14px 20px;
  font-size: 0.82rem;
  color: var(--text-dim);
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin-bottom: 64px;
}

.disclosure-banner-icon { color: var(--warn); flex-shrink: 0; font-size: 1rem; line-height: 1.5; }
.disclosure-banner strong { color: var(--warn); }

/* === Main body === */

.tech-body {
  max-width: 960px;
  margin: 0 auto;
  padding: 48px 24px 100px;
}

/* === Section layout === */

.tech-section { margin-bottom: 96px; }

.section-label {
  display: block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  margin-bottom: 10px;
}

.tech-section h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2rem;
  color: var(--text-bright);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.tech-section h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.2rem;
  color: var(--text-bright);
  margin: 0;
}

.tech-section p {
  color: var(--text-dim);
  margin-bottom: 16px;
  line-height: 1.8;
  font-size: 0.97rem;
}

.tech-divider { border: none; border-top: 1px solid var(--border); margin: 0; }

/* === CTA Button === */

.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;
  font-family: 'Inter', sans-serif;
}

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

/* === Node table === */

.node-table {
  width: 100%;
  border-collapse: collapse;
  margin: 0;
  font-size: 0.85rem;
}

.node-table th {
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--text-dim);
  font-weight: 600;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

.node-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--text-dim);
  vertical-align: top;
}

.node-table tr:last-child td { border-bottom: none; }
.node-table td:first-child { color: var(--text-bright); font-weight: 600; font-family: 'Space Grotesk', sans-serif; }

/* === Collapsible sections (How to Listen) === */

.collapsible-section {
  margin-top: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.collapsible-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 16px 20px;
  background: none;
  border: none;
  color: var(--text);
  font-family: 'Inter', sans-serif;
  font-size: 0.92rem;
  font-weight: 500;
  cursor: pointer;
  transition: color 0.2s;
}

.collapsible-toggle:hover { color: var(--accent); }

.toggle-icon {
  font-size: 1.2rem;
  font-weight: 300;
  color: var(--text-dim);
  transition: transform 0.2s;
}

.collapsible-content {
  padding: 0 20px 20px;
}

/* === Audio player (from technology page) === */

.player-row { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.player-label { font-size: 0.72rem; font-weight: 600; color: var(--accent); text-transform: uppercase; letter-spacing: 0.08em; width: 64px; flex-shrink: 0; }
.custom-player { display: flex; align-items: center; gap: 10px; flex: 1; }
.play-btn { width: 32px; height: 32px; 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: 0.7rem; flex-shrink: 0; transition: background 0.2s; }
.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: 0.72rem; color: var(--text-dim); width: 36px; text-align: right; flex-shrink: 0; }

/* === Song cards === */

.song-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 16px;
  transition: border-color 0.2s;
  overflow: hidden;
}

.song-card:hover { border-color: rgba(0, 212, 170, 0.3); }

.song-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  cursor: pointer;
  user-select: none;
  transition: background 0.2s;
}

.song-card-header:hover { background: var(--bg-card-hover); }

.song-card-title {
  display: flex;
  align-items: center;
  gap: 12px;
}

.song-card-title h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1rem;
  color: var(--text-bright);
  margin: 0;
}

.instrument-tag {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  background: var(--accent-glow);
  padding: 3px 8px;
  border-radius: 20px;
  white-space: nowrap;
}

.expand-icon {
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--text-dim);
  flex-shrink: 0;
  line-height: 1;
}

.song-card-body {
  padding: 0 24px 24px;
}

.song-card-note {
  font-size: 0.82rem;
  color: var(--text-dim);
  font-style: italic;
  margin-bottom: 12px;
}

/* === Pedal selector === */

.pedal-selector {
  display: flex;
  gap: 6px;
  margin: 14px 0;
  flex-wrap: wrap;
}

.pedal-btn {
  padding: 6px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-dim);
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  min-width: 44px;
  text-align: center;
}

.pedal-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}

.pedal-btn.active {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}

/* === Spin animation (for auth gate) === */
@keyframes spin { to { transform: rotate(360deg); } }

/* === Responsive === */

@media (max-width: 700px) {
  .tech-nav-inner { flex-direction: column; gap: 10px; }
  .tech-body { padding: 32px 16px 80px; }
  .tech-section h2 { font-size: 1.5rem; }
  .pedal-selector { gap: 4px; }
  .pedal-btn { padding: 8px 10px; min-width: 38px; font-size: 0.75rem; }
  .player-label { width: 52px; font-size: 0.65rem; }
  .song-card-header { padding: 14px 16px; }
  .song-card-body { padding: 0 16px 16px; }
  .song-card-title { gap: 8px; }
  .song-card-title h3 { font-size: 0.9rem; }
}

@media (max-width: 400px) {
  .pedal-selector { gap: 3px; }
  .pedal-btn { padding: 8px 8px; min-width: 32px; font-size: 0.7rem; }
}