:root {
  --bg: #0b0f14;
  --panel: #11161c;
  --ink: #e6edf3;
  --muted: #8aa0b4;
  --line: #1f2a36;
  --accent: #1b6fd0;
  --accent2: #124e9c;
  --pill: #16324a;
  --grid: #1d2936;
  --grid-bar: #264257;
  --panelShadow: 0 12px 30px rgba(0,0,0,.35), inset 0 1px 0 rgba(255,255,255,0.02);
  --ring: 0 0 0 3px rgba(36, 131, 255, .25);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden; /* prevent accidental horizontal scroll on mobile */
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid #13202f;
  background: linear-gradient(180deg, #0c141e, var(--bg));
  backdrop-filter: blur(20px);
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.brand .logo { width: 40px; height: 40px; filter: drop-shadow(0 0 12px rgba(100, 180, 255, .35)); }
.brand .brand-text {
  background: linear-gradient(180deg, #e6f3ff, #bcdcff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 0 18px rgba(50,145,255,.25);
  letter-spacing: -0.02em;
}

/* Spin animation for logo while playing */
.logo.spin { animation: spin 2.5s linear infinite; }
@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

/* Subtle pulsing glow for brand text when playing */
.brand-text.pulse { animation: pulse 1.6s ease-in-out infinite; }
@keyframes pulse {
  0%, 100% { text-shadow: 0 0 14px rgba(50,145,255,.20), 0 0 0 rgba(139,92,246,.0); }
  50% { text-shadow: 0 0 24px rgba(50,145,255,.35), 0 0 14px rgba(139,92,246,.25); }
}
.snap-group {
  display: flex;
  gap: 12px;
  align-items: center;
}
.snap-group label {
  color: var(--muted);
  font-size: 0.9375rem;
}
.cwrap {
  gap: 8px;
  align-items: center;
}
.hz { color: var(--muted); }

.shell {
  padding: 20px;
  display: grid;
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px;
  box-shadow: var(--panelShadow);
  align-self: start; /* prevent grid stretch creating extra bottom space */
}

/* Trim bottom whitespace inside panels */
.panel { padding-bottom: 10px; }
.panel > *:last-child { margin-bottom: 0; }

/* Tones panel */
.tone-head {
  display: grid;
  gap: 16px;
  margin-bottom: 24px;
}
.title {
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.01em;
  text-align: center;
}
.readouts {
  display: grid;
  gap: 12px;
}
.ro {
  display: grid;
  grid-template-columns: 32px 1fr auto;
  gap: 12px;
  align-items: baseline;
  color: var(--muted);
  font-size: 0.9375rem;
}
.ro strong {
  color: var(--ink);
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-align: right;
  min-width: 100px;
}
.ro strong.in-scale { color: #22c55e; }
.ro em {
  font-style: normal;
  color: #9dd4ff;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  min-width: 48px;
  text-align: right;
}

.tone-controls {
  display: grid;
  gap: 24px;
}
.tone-controls > div {
  display: grid;
  gap: 12px;
}
.tone-controls label {
  color: var(--muted);
  font-size: 0.9375rem;
}

.slider-row {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr auto;
  align-items: center;
}
.slider-row input[type=number] {
  width: 90px;
}
.slider-row-arrows{ grid-template-columns: auto 1fr auto auto; align-items: center; }
.icon{ background:#0e141b; border:1px solid var(--line); color:var(--ink); border-radius:10px; padding:6px 10px; }
.icon:hover{ filter: brightness(1.08); }
.no-spin::-webkit-outer-spin-button,.no-spin::-webkit-inner-spin-button{ -webkit-appearance:none; margin:0; }
.no-spin{ -moz-appearance:textfield; }

input[type=range] {
  width: 100%;
  appearance: none;
  height: 6px;
  border-radius: 3px;
  background: linear-gradient(90deg, #244363, #1a2b3e);
  cursor: pointer;
}

/* Special gradient for B frequency slider - red closest to 1.22 ratio, blue furthest */
#bFreqSlider {
  background: linear-gradient(90deg, #3b82f6, #10b981, #eab308, #f59e0b, #ef4444);
}
input[type=range]::-webkit-slider-thumb {
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #9dd4ff;
  border: 1px solid #6bb5ef;
  box-shadow: 0 0 0 4px rgba(157,212,255,.15);
  transition: box-shadow .15s ease;
}
input[type=range]::-webkit-slider-thumb:hover {
  box-shadow: 0 0 0 6px rgba(157,212,255,.2);
}

input[type=number], select {
  background: #0e141b;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px 12px;
  font-size: 0.9375rem;
  min-width: 80px;
}
input[type=number]:focus, select:focus { outline: none; box-shadow: var(--ring); border-color: #245fb3; }
select { padding-right: 32px; }

.subs {
  display: flex;
  gap: 16px;
  align-items: center;
}
.chk {
  display: flex;
  gap: 8px;
  align-items: center;
  color: var(--muted);
  font-size: 0.9375rem;
}
.transport {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}
.export-row { display:none }
.composer-actions { display:flex; justify-content:center; gap:10px; margin-top:12px }
.panel-hint { text-align: center; margin: 8px 0 0; }

.hint { color: var(--muted); font-size: 0.9375rem; }
.panel-hint { text-align: center; margin: 10px 0 4px; }

button {
  background: linear-gradient(180deg, var(--accent), var(--accent2));
  color: #fff;
  border: 0;
  border-radius: 12px;
  padding: 10px 16px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity .15s ease;
  white-space: nowrap;
}
button:hover { opacity: 0.9; }
button.primary {
  background: linear-gradient(180deg, #2693ff, #1a6fd1);
}
button.ghost { background: linear-gradient(180deg, #163a66, #102a4d); border: 1px solid #14365f; color: #cfe7ff; }
button.ghost.active { background: linear-gradient(180deg, #2693ff, #1a6fd1); border-color: #1a6fd1; color: #fff; }
button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Composer panel */
.seq-head {
  display: grid;
  grid-auto-flow: row;
  justify-items: center;
  align-items: center;
  row-gap: 12px;
  margin-bottom: 16px;
}
.seq-opts {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
}
.seq-opts label {
  color: var(--muted);
  margin-right: -4px;
}
.seq-opts input[type=number] {
  width: 70px;
}

.timeline {
  width: 100%;
  height: 220px;
  background: #0e141b;
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--panelShadow);
  cursor: pointer;
}
.tone-panel .viz-row { margin-bottom: 0; }
.timeline line {
  stroke-width: 1;
}
.timeline rect {
  transition: opacity .15s ease;
}
.timeline rect:hover {
  opacity: 1;
}
.note-left { fill:#2693ff; filter: saturate(1.1); }
.note-right { fill:#8b5cf6; filter: saturate(1.1); }

.note-palette {
  display: flex;
  gap: 8px;
  margin-top: 16px;
  justify-content: center;
}
.pill {
  background: var(--pill);
  font-size: 0.875rem;
  padding: 8px 12px;
  min-width: 44px;
  text-align: center;
}
.pill.primary {
  background: var(--accent);
}

@media (min-width: 900px) {
  .shell {
    grid-template-columns: 360px 1fr;
  }
  .tone-head {
    gap: 20px;
  }
  .readouts {
    gap: 16px;
  }
  .ro {
    grid-template-columns: 32px 1fr 64px;
  }
  /* Match Copy layout: Tones left (360px), Composer right */
  /* No explicit grid-column overrides needed. */
  .panel-wrap { display: contents; }
  .panel-hint.tone { grid-column: 1; }
  .panel-hint.seq { grid-column: 2; }
}

/* Mobile optimizations */
@media (max-width: 560px) {
  .shell { grid-template-columns: 1fr !important; }
  .panel { width: 100%; }
  .topbar, .snap-group { width: 100%; overflow: hidden; }
  canvas, svg, img { max-width: 100%; height: auto; }
  .topbar { padding: 12px 14px; flex-wrap: wrap; row-gap: 8px; }
  .brand { gap: 8px; }
  .brand .logo { width: 28px; height: 28px; }
  .brand .brand-text { font-size: 1.05rem; text-shadow: 0 0 12px rgba(50,145,255,.22); }
  .snap-group { flex-wrap: wrap; gap: 8px; width: 100%; justify-content: flex-start; }
  .snap-group > * { min-width: 0; }
  .cwrap { gap: 6px; }
  #snapMode { max-width: 60vw; }
  input[type=number], select { min-width: 68px; padding: 7px 10px; border-radius: 9px; font-size: 0.9rem; }

  .shell { padding: 14px; gap: 14px; }
  .panel { padding: 14px; border-radius: 14px; }
  .title { font-size: 1.1rem; }
  .tone-head { margin-bottom: 12px; }
  .readouts { gap: 8px; }
  .ro { grid-template-columns: 24px 1fr 56px; gap: 10px; }
  .ro strong { min-width: 0; font-size: 1rem; }
  .ro em { min-width: 40px; font-size: 0.9rem; }

  .tone-controls { gap: 16px; }
  .transport { margin-top: 6px; }
  .inst-row { margin-top: 6px !important; }
  button { padding: 9px 12px; border-radius: 10px; }
  .composer-actions { gap: 8px; }
  .timeline { height: 180px; }
  .note-palette { flex-wrap: wrap; row-gap: 6px; }
  .panel-hint { margin: 8px 12px 0; font-size: 0.95rem; }
}

/* Removed panel-wrap layout overrides to match Copy layout */