/* Sonic Healing — cosmic blue / gold palette inspired by reidos */
:root {
  --bg-0: #050816;
  --bg-1: #0a1024;
  --bg-2: #131a36;
  --ink: #e8ecf7;
  --muted: #8a95b8;
  --gold: #d4af55;
  --gold-glow: #f0cb6b;
  --accent: #6fa8ff;
  --accent-2: #b886ff;
  --line: rgba(255,255,255,0.07);
  --layer-bg: rgba(212,175,85,0.06);
  --layer-line: rgba(212,175,85,0.2);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: radial-gradient(ellipse at 50% -10%, #1a2055 0%, var(--bg-0) 55%) fixed;
  color: var(--ink);
  font-family: -apple-system, "SF Pro Display", "Segoe UI", system-ui, sans-serif;
  font-weight: 300;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

.hero {
  text-align: center;
  padding: 4rem 1rem 2rem;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(212,175,85,0.12) 0%, transparent 40%),
    radial-gradient(ellipse at 50% 100%, rgba(111,168,255,0.08) 0%, transparent 60%);
}
.wordmark {
  font-size: clamp(2rem, 7vw, 3.5rem);
  font-weight: 200;
  letter-spacing: 0.4em;
  color: var(--ink);
}
.wordmark span {
  color: var(--gold);
  text-shadow: 0 0 24px rgba(240,203,107,0.4);
}
.tagline {
  margin-top: 0.5rem;
  color: var(--muted);
  font-size: 0.95rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}
.version-stamp {
  margin-top: 0.4rem;
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  opacity: 0.7;
  position: relative;
  z-index: 1;
}

main {
  max-width: 980px;
  margin: 0 auto;
  padding: 1rem 1rem 6rem;
}

h2 {
  font-weight: 300;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-size: 0.8rem;
  color: var(--muted);
  margin: 2.5rem 0 1rem;
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.5rem;
}
h3 {
  font-weight: 300;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 1.5rem 0 0.75rem;
}

.transport {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  padding: 1.25rem;
  background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0));
  border: 1px solid var(--line);
  border-radius: 14px;
  margin-top: 1rem;
}
.play-btn {
  width: 64px; height: 64px;
  border-radius: 50%;
  border: 1px solid var(--gold);
  background: radial-gradient(circle at 30% 30%, rgba(212,175,85,0.3), rgba(212,175,85,0.05));
  color: var(--gold);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  transition: transform 0.15s, box-shadow 0.15s;
}
.play-btn:hover { transform: scale(1.04); box-shadow: 0 0 24px rgba(212,175,85,0.4); }
.play-btn.playing { background: radial-gradient(circle at 30% 30%, rgba(240,203,107,0.45), rgba(212,175,85,0.1)); }

.transport-meta {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
#layer-count { color: var(--muted); font-size: 0.85rem; }
.vol-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.85rem;
}
.vol-row > span:first-child { color: var(--muted); min-width: 100px; }
.vol-row input[type=range] { flex: 1; }
.vol-row select {
  background: var(--bg-2); color: var(--ink); border: 1px solid var(--line);
  padding: 0.25rem 0.5rem; border-radius: 6px; font-size: 0.85rem;
}
.sleep-remaining { color: var(--gold); font-size: 0.8rem; }

input[type=range] {
  -webkit-appearance: none;
  background: transparent;
  height: 20px;
}
input[type=range]::-webkit-slider-runnable-track {
  background: linear-gradient(90deg, var(--gold) 0%, var(--accent) 100%);
  height: 2px; border-radius: 1px;
}
input[type=range]::-moz-range-track {
  background: linear-gradient(90deg, var(--gold) 0%, var(--accent) 100%);
  height: 2px; border-radius: 1px;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px; height: 14px;
  background: var(--gold-glow);
  border-radius: 50%;
  margin-top: -6px;
  box-shadow: 0 0 8px rgba(240,203,107,0.6);
  cursor: pointer;
}
input[type=range]::-moz-range-thumb {
  width: 14px; height: 14px;
  background: var(--gold-glow);
  border-radius: 50%;
  border: 0;
  box-shadow: 0 0 8px rgba(240,203,107,0.6);
  cursor: pointer;
}

.ghost-btn {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--muted);
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  font-size: 0.8rem;
  cursor: pointer;
  align-self: flex-start;
}
.ghost-btn:hover { border-color: var(--gold); color: var(--gold); }

#layers { display: flex; flex-direction: column; gap: 0.5rem; min-height: 30px; }
#layers:empty::before {
  content: "Tap any frequency or noise below to start layering.";
  color: var(--muted); font-style: italic; font-size: 0.9rem;
}
.layer {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 0.5rem 0.75rem;
  background: var(--layer-bg);
  border: 1px solid var(--layer-line);
  border-radius: 10px;
}
.layer .hz { color: var(--gold); font-variant-numeric: tabular-nums; min-width: 70px; }
.layer .name { flex: 1; font-size: 0.9rem; color: var(--ink); }
.layer input[type=range] { width: 120px; }
.layer .remove {
  background: transparent; border: none; color: var(--muted); cursor: pointer;
  font-size: 1.2rem; padding: 0 0.25rem;
}
.layer .remove:hover { color: #ff8a8a; }

.library-head {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  margin: 2rem 0 0;
}
.library-head h2 { margin: 0; padding: 0; border: 0; }
#search {
  background: var(--bg-2);
  border: 1px solid var(--line);
  color: var(--ink);
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
  font-size: 0.85rem;
  min-width: 220px;
}
#search:focus { outline: 1px solid var(--gold); }

.tabs {
  display: flex; gap: 0.4rem; flex-wrap: wrap;
  margin: 1rem 0;
}
.tab {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--muted);
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
}
.tab.active {
  border-color: var(--gold);
  color: var(--gold);
  background: rgba(212,175,85,0.08);
}
.tab:hover { color: var(--ink); }

.freq-grid, .noise-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.5rem;
}
.freq-chip, .noise-chip {
  display: flex; flex-direction: column; align-items: flex-start;
  padding: 0.6rem 0.75rem;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
  text-align: left;
  transition: border-color 0.1s, background 0.1s;
  color: inherit;
  font: inherit;
}
.freq-chip:hover, .noise-chip:hover {
  border-color: var(--gold);
  background: rgba(212,175,85,0.05);
}
.freq-chip.active, .noise-chip.active {
  border-color: var(--gold);
  background: rgba(212,175,85,0.12);
  box-shadow: inset 0 0 12px rgba(212,175,85,0.1);
}
.freq-chip .hz {
  color: var(--gold-glow);
  font-size: 1.1rem;
  font-variant-numeric: tabular-nums;
}
.freq-chip .name { color: var(--muted); font-size: 0.78rem; margin-top: 0.15rem; }
.freq-chip .binaural-tag {
  font-size: 0.65rem; letter-spacing: 0.15em; text-transform: uppercase;
  color: var(--accent); margin-top: 0.2rem;
}
.noise-chip { font-weight: 300; }
.noise-chip .name { color: var(--ink); }

.binaural-config {
  margin-top: 2rem;
  padding: 1rem 1.25rem;
  background: rgba(111,168,255,0.04);
  border: 1px solid rgba(111,168,255,0.15);
  border-radius: 10px;
}
.binaural-config p.muted {
  font-size: 0.8rem;
  color: var(--muted);
  margin: 0.5rem 0 1rem;
}

.muted { color: var(--muted); }
footer { margin-top: 3rem; text-align: center; }
footer p { font-size: 0.75rem; }

/* ---------- visualizer canvas ---------- */
.hero { position: relative; overflow: hidden; }
.viz {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 0;
}
.wordmark, .tagline { position: relative; z-index: 1; }

/* ---------- suggestion banner ---------- */
.suggest {
  margin: 1rem 0 0;
  padding: 0.75rem 1rem;
  background: linear-gradient(90deg, rgba(212,175,85,0.1), rgba(111,168,255,0.06));
  border: 1px solid rgba(212,175,85,0.3);
  border-radius: 10px;
  display: flex; gap: 0.75rem; align-items: center;
  font-size: 0.9rem;
}
.suggest #suggest-text { flex: 1; color: var(--gold); }

/* ---------- transport extras ---------- */
.btn-row { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-top: 0.5rem; }
.ghost-btn.small { font-size: 0.7rem; padding: 0.25rem 0.55rem; }
.small { font-size: 0.78rem; }
.hidden { display: none !important; }

/* ---------- portals & presets ---------- */
.portals h2 { margin-top: 1.5rem; }
.portal-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.6rem;
}
.preset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.5rem;
}
.preset-card {
  text-align: left;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.75rem 0.85rem;
  color: inherit;
  font: inherit;
  cursor: pointer;
  position: relative;
  transition: border-color 0.15s, background 0.15s, transform 0.1s;
}
.preset-card:hover { border-color: var(--gold); transform: translateY(-1px); }
.preset-card.active { border-color: var(--gold); background: rgba(212,175,85,0.12); box-shadow: inset 0 0 12px rgba(212,175,85,0.15); }
.preset-card.portal {
  background: linear-gradient(180deg, rgba(212,175,85,0.06), rgba(111,168,255,0.04));
  border-color: rgba(212,175,85,0.25);
}
.preset-card.user { background: rgba(111,168,255,0.04); border-color: rgba(111,168,255,0.2); }
.preset-name {
  color: var(--gold-glow);
  font-size: 1rem;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}
.preset-card.user .preset-name { color: var(--accent); }
.preset-blurb { color: var(--muted); font-size: 0.78rem; line-height: 1.4; }
.preset-meta { color: var(--muted); font-size: 0.7rem; margin-top: 0.4rem; opacity: 0.7; }
.del-btn {
  position: absolute; top: 4px; right: 4px;
  background: transparent; border: 0; color: var(--muted);
  font-size: 1rem; cursor: pointer; padding: 0.1rem 0.35rem;
}
.del-btn:hover { color: #ff8a8a; }

/* ---------- mode toggle ---------- */
.mode-row {
  display: flex; align-items: center; gap: 0.75rem; flex-wrap: wrap;
  margin: 0.75rem 0;
}
.toggle { display: inline-flex; align-items: center; gap: 0.3rem; cursor: pointer; }
.toggle input[type=radio] { accent-color: var(--gold); }

/* ---------- noise grouping ---------- */
.noise-group-head {
  grid-column: 1 / -1;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0.5rem 0 0.25rem;
  border-top: 1px solid var(--line);
  padding-top: 0.5rem;
}

/* ---------- info button on freq chips ---------- */
.freq-chip { position: relative; }
.info-btn {
  position: absolute; top: 4px; right: 6px;
  background: transparent; border: 0; color: var(--muted);
  cursor: pointer; font-size: 0.85rem;
}
.info-btn:hover { color: var(--gold); }

/* ---------- modals ---------- */
.modal {
  position: fixed; inset: 0;
  background: rgba(5, 8, 22, 0.85);
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
  padding: 1rem;
}
.modal-card {
  background: var(--bg-1);
  border: 1px solid var(--gold);
  border-radius: 12px;
  padding: 1.25rem;
  max-width: 480px;
  width: 100%;
  box-shadow: 0 0 60px rgba(212,175,85,0.2);
}
.modal-head {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-size: 0.8rem;
}
.hz-big { color: var(--gold-glow); font-size: 1.5rem; font-variant-numeric: tabular-nums; }
.modal input[type=text] {
  width: 100%;
  background: var(--bg-2);
  border: 1px solid var(--line);
  color: var(--ink);
  padding: 0.6rem 0.8rem;
  border-radius: 8px;
  font: inherit;
  margin-bottom: 0.6rem;
}
.modal input[type=text]:focus { outline: 1px solid var(--gold); }

/* ---------- breath pacer ---------- */
.breath-stage {
  display: flex; flex-direction: column; align-items: center;
  padding: 1.5rem 0;
}
.breath-orb {
  width: 100px; height: 100px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(240,203,107,0.7), rgba(212,175,85,0.1));
  border: 1px solid var(--gold);
  margin-bottom: 1rem;
  transform: scale(1);
  box-shadow: 0 0 40px rgba(212,175,85,0.3);
}
#breath-label {
  color: var(--gold);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-size: 0.9rem;
}

/* ---------- mobile ---------- */
@media (max-width: 600px) {
  .transport { flex-direction: column; align-items: stretch; gap: 1rem; }
  .play-btn { align-self: center; }
  .vol-row > span:first-child { min-width: 80px; font-size: 0.8rem; }
  .library-head { flex-direction: column; align-items: stretch; }
  #search { width: 100%; }
  .freq-grid, .noise-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
  .portal-grid, .preset-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
  .modal-card { padding: 1rem; }
  .hero { padding-top: 3rem; padding-bottom: 1.5rem; }
}