:root {
  --bg: #fbfaf7;
  --panel: #ffffff;
  --ink: #1d232b;
  --muted: #6b7280;
  --line: #e3e1db;
  --grid: #eeece6;
  --accent: #2e86ab;
  --error: #b42318;
  --wave: #2e86ab;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15181c;
    --panel: #1c2026;
    --ink: #e7e5df;
    --muted: #9aa1ab;
    --line: #2d333b;
    --grid: #242a31;
    --accent: #5fb3d6;
    --error: #f97066;
    --wave: #5fb3d6;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 14px/1.4 system-ui, -apple-system, "Segoe UI", sans-serif;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
button, input { font: inherit; color: inherit; }
button {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 4px 10px;
  cursor: pointer;
}
button:disabled { opacity: 0.45; cursor: default; }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; min-width: 5.5em; }
kbd { font-size: 11px; color: var(--muted); }

.bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 20px;
  padding: 8px 16px;
  border-bottom: 1px solid var(--line);
}
.bar h1 { font-size: 16px; margin: 0; font-weight: 600; }
.bar .about { color: var(--muted); font-size: 13px; text-decoration: none; margin-left: 4px; }
.bar .about:hover { color: inherit; text-decoration: underline; }
.tab-caption { color: var(--muted); font-size: 13px; margin: 0 0 8px; }
.tabs { display: flex; gap: 2px; }
.tabs button { border-radius: 6px 6px 0 0; border-bottom: none; }
.tabs button.active { border-color: var(--accent); box-shadow: inset 0 -2px var(--accent); }
.controls { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin-left: auto; }
.duration input { width: 5em; padding: 3px 4px; border: 1px solid var(--line); border-radius: 6px; background: var(--panel); }
.check { display: inline-flex; align-items: center; gap: 4px; user-select: none; }

main { flex: 1; padding: 12px 16px; display: flex; flex-direction: column; gap: 12px; }

.tracks-body { display: flex; gap: 12px; align-items: flex-start; }
.painted-body, .blobs-body, .edit-body, .mask-body { display: flex; gap: 12px; align-items: flex-start; }
.paint-area { flex: 1; min-width: 0; position: relative; }
canvas.paint, canvas.plane {
  display: block; width: 100%; height: min(60vh, 440px); min-height: 240px;
  background: var(--panel); border: 1px solid var(--line); border-radius: 6px;
  cursor: crosshair; touch-action: none;
}
.side .field { display: flex; align-items: center; gap: 6px; padding: 2px 0; flex-wrap: wrap; }
.side .field[hidden] { display: none; }
.side .field input[type=range] { flex: 1; min-width: 60px; }
.side .field input[type=number] { width: 4.5em; }
.side .clear { margin-top: 4px; }
canvas.stft {
  display: block; width: 100%; height: 180px; margin-top: 8px;
  background: var(--panel); border: 1px solid var(--line); border-radius: 6px;
}
.blobs-body canvas.stft { height: 300px; touch-action: none; }
.blobs-body canvas.plane { height: min(46vh, 360px); }
.mask-body canvas.filter-plane {
  display: block; width: 100%; height: min(50vh, 400px); min-height: 240px;
  background: var(--panel); border: 1px solid var(--line); border-radius: 6px;
  cursor: crosshair; touch-action: none;
}
.mask-body canvas.filter-result {
  display: block; width: 100%; height: 260px;
  background: var(--panel); border: 1px solid var(--line); border-radius: 6px;
}
.edit-body canvas.mask-plane {
  display: block; width: 100%; height: min(50vh, 400px); min-height: 240px;
  background: var(--panel); border: 1px solid var(--line); border-radius: 6px;
  cursor: crosshair; touch-action: none;
}
.edit-body canvas.measured-plane {
  display: block; width: 100%; height: 170px;
  background: var(--panel); border: 1px solid var(--line); border-radius: 6px;
}
.edit-body .clip-note { margin: 0 10px 0 52px; }
.edit-body .clip-note[hidden] { display: none; }
.edit-body canvas.result-stft {
  display: block; width: 100%; height: 220px;
  background: var(--panel); border: 1px solid var(--line); border-radius: 6px;
}
.side .preset-row { display: flex; align-items: center; gap: 4px; margin-bottom: 4px; }
.side .preset-row input { width: 3.5em; }
.side .no-down, .side .no-up, .side .open-audio { display: block; width: 100%; margin-top: 4px; }
.side select.source { width: 100%; }
.side .recording-note:empty { display: none; }
.side .recording-note { margin-top: 4px; }
.panel-box {
  display: flex; gap: 6px; padding: 8px 8px 8px 4px; margin-bottom: 10px;
  border: 1px solid var(--line); border-radius: 8px;
}
.design-box { background: color-mix(in srgb, var(--accent) 5%, transparent); }
.result-box { background: color-mix(in srgb, var(--muted) 7%, transparent); }
.panel-group {
  margin: 0; writing-mode: vertical-rl; transform: rotate(180deg); text-align: center;
  font-size: 13px; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase;
}
.design-box .panel-group { color: var(--accent); }
.result-box .panel-group { color: var(--muted); }
.panel-stack { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 8px; position: relative; }

/* Synthesis progress, over the top of the tab's main figure; it never takes the pointer */
.synth-progress { position: absolute; left: 0; right: 0; top: 0; pointer-events: none; z-index: 3; }
.synth-progress .bar { height: 3px; width: 0; background: var(--accent); border-radius: 2px; transition: width 0.15s; }
.synth-progress.unknown .bar { width: 30%; animation: synth-slide 1.2s ease-in-out infinite alternate; }
@keyframes synth-slide { from { margin-left: 0; } to { margin-left: 70%; } }
.synth-progress .label {
  position: absolute; right: 6px; top: 7px; font-size: 11px; color: var(--ink);
  background: color-mix(in srgb, var(--panel) 85%, transparent); border: 1px solid var(--line);
  border-radius: 4px; padding: 1px 6px;
}
.panel-stack canvas { margin-top: 0; }
canvas.wave {
  display: block; height: 60px; margin: 0 10px 0 52px; width: calc(100% - 62px);
  background: var(--panel); border: 1px solid var(--line); border-radius: 6px;
}
.side .band-tools { display: flex; flex-wrap: wrap; gap: 2px 10px; margin-bottom: 4px; font-size: 13px; }
.band-tool kbd { font-size: 10px; color: var(--muted); }
canvas.measured {
  display: block; width: 100%; height: 170px;
  background: var(--panel); border: 1px solid var(--line); border-radius: 6px;
}
.side .f0-field[hidden], .side .iterations-field[hidden], .side .blob-edit[hidden], .side .use-depth[hidden], .side .coarse[hidden],
.side .band-edit[hidden], .side .band-motion[hidden] { display: none; }
.side .blob-count, .side .band-count { margin-bottom: 4px; }
.side .add-band { margin-top: 4px; }
.side .use-depth { border-color: var(--accent); }
.panels { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 6px; }
.panel {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 6px;
  height: 96px;
}
.panel[hidden] { display: none; }
.panel-formants { height: min(52vh, 380px); min-height: 220px; }
.panel-F0 { height: min(28vh, 210px); min-height: 160px; } /* tall enough to draw pitch on: about 35 px per octave */
.panel canvas.background { position: absolute; pointer-events: none; }
.panel svg.surface {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  touch-action: none;
  cursor: crosshair;
}
.grid line { stroke: var(--grid); stroke-width: 1; }
.grid line.time { stroke-dasharray: 2 3; }
.tick { fill: var(--muted); font-size: 11px; text-anchor: end; dominant-baseline: middle; }
.panel-title { fill: var(--muted); font-size: 11px; dominant-baseline: hanging; }
.track polyline { fill: none; stroke: var(--track); stroke-width: 1.5; opacity: 0.55; }
.track.selected polyline { stroke-width: 3; opacity: 1; }
.track circle { fill: var(--panel); stroke: var(--track); stroke-width: 2; }
.track-label { fill: var(--track); font-size: 11px; font-weight: 600; text-anchor: end; }
.preview { fill: none; stroke: var(--ink); stroke-width: 1.5; stroke-dasharray: 4 3; }
.playhead { stroke: var(--accent); stroke-width: 1.5; }
/* Over the magma spectrogram: lighter grid and text, and each formant in a
   bright hue magma does not use (--track-bright), on a dark casing, so it
   reads on the black, red and yellow parts alike. */
.on-spectrogram .grid line { stroke: rgba(255, 255, 255, 0.18); }
.on-spectrogram .panel-title { fill: rgba(255, 255, 255, 0.8); }
.on-spectrogram .track polyline { stroke: var(--track-bright, var(--track)); stroke-width: 2; opacity: 0.9; }
.on-spectrogram .track.selected polyline { stroke-width: 3; opacity: 1; }
.on-spectrogram .track polyline, .on-spectrogram .track-label, .on-spectrogram .track circle {
  filter: drop-shadow(0 0 1px rgba(0, 0, 0, 0.95)) drop-shadow(0 0 1.5px rgba(0, 0, 0, 0.8));
}
.on-spectrogram .track-label { fill: var(--track-bright, var(--track)); }
.on-spectrogram .track circle { fill: #000; stroke: var(--track-bright, var(--track)); }
.on-spectrogram .preview { stroke: #fff; }
.on-spectrogram .playhead { stroke: #fff; }

.time-axis { width: 100%; height: 18px; margin-top: -4px; }
.time-axis text { fill: var(--muted); font-size: 11px; text-anchor: middle; }
.time-axis text.unit { text-anchor: end; }

.side { width: 150px; display: flex; flex-direction: column; gap: 10px; }
.side fieldset { border: 1px solid var(--line); border-radius: 6px; margin: 0; padding: 6px 8px 8px; }
.side legend { color: var(--muted); font-size: 12px; padding: 0 4px; }
.choice { display: flex; align-items: center; gap: 6px; padding: 2px 0; }
.choice kbd { margin-left: auto; }
.track-group { display: grid; grid-template-columns: repeat(3, 1fr); gap: 4px; }
/* Each track's button carries the colour it is drawn in over the spectrogram:
   the bright stripe on a dark edge, and dark with the bright text when chosen. */
.track-group button { padding: 3px 0; border-left: 5px solid var(--track-bright, var(--track)); box-shadow: inset 1px 0 0 #1b1b24, -1px 0 0 #1b1b24; }
.track-group button kbd { font-size: 10px; font-weight: 400; margin-left: 2px; }
.track-group button.active { background: #1b1b24; color: var(--track-active, #fff); font-weight: 600; }
.hint { color: var(--muted); font-size: 12px; margin: 0; }

.result {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-right: 162px;
}
.result-row { display: flex; align-items: center; gap: 0; }
.result-label { width: 52px; color: var(--muted); font-size: 11px; }
.result canvas {
  flex: 1;
  min-width: 0;
  height: 70px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 6px;
}

.status {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 6px 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}
.status .error { color: var(--error); }

@media (max-width: 720px) {
  .tracks-body { flex-direction: column-reverse; }
  .painted-body, .blobs-body, .edit-body, .mask-body { flex-direction: column-reverse; }
  .time-axis { width: 100%; height: 18px; margin-top: -4px; }
.time-axis text { fill: var(--muted); font-size: 11px; text-anchor: middle; }
.time-axis text.unit { text-anchor: end; }

.side { width: 100%; flex-direction: row; flex-wrap: wrap; }
  .result { margin-right: 0; }
}

.log { background: var(--panel); border: 1px solid var(--line); border-radius: 6px; padding: 8px 10px; }
.log[hidden], main > .result[hidden] { display: none; }
.log-head { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.log-note { color: var(--muted); font-size: 12px; margin-right: auto; }
.log pre {
  margin: 8px 0 0;
  max-height: 240px;
  overflow: auto;
  font: 12px/1.45 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  white-space: pre-wrap;
  word-break: break-word;
}
.log pre .error { color: var(--error); }
#log-toggle.has-errors { border-color: var(--error); color: var(--error); }
.panel svg.over-point { cursor: grab; }
.panel svg.over-point:active { cursor: grabbing; }