/* Audio Mastering Analysis Toolkit — web front end.
   Dark by default: a spectrogram is read against its surroundings, and the
   desktop app's pythonic defaults are what these numbers were tuned against. */

:root {
  --bg: #12141a;
  --panel: #191c24;
  --panel-2: #1f232d;
  --line: #2b303c;
  --text: #e8eaf0;
  --muted: #939aa8;
  --accent: #4fc3f7;
  --accent-dim: #2b7fa3;
  --warn: #ffb74d;
  --error: #ef5350;
  --ok: #81c784;
  --radius: 6px;
  --mono: ui-monospace, "Cascadia Mono", "Source Code Pro", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

/* The UA's [hidden] { display: none } loses to any class that sets display
   (e.g. .drop-overlay's flex), which left the overlay permanently covering the
   page. Make the attribute win everywhere. */
[hidden] { display: none !important; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font: 13px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", sans-serif;
  overflow: hidden;
}

/* ---- top bar ---- */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 48px;
  padding: 0 14px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}

.brand { display: flex; align-items: baseline; gap: 8px; }
.logo { color: var(--accent); font-size: 16px; }
.brand-name { font-weight: 600; letter-spacing: .2px; }
.brand-sub {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--bg);
  background: var(--accent-dim);
  border-radius: 3px;
  padding: 1px 5px;
}

.topbar-controls { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

.field { display: flex; align-items: center; gap: 6px; color: var(--muted); font-size: 12px; }

select, .btn, .toggle {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 5px 9px;
  font: inherit;
  font-size: 12px;
  cursor: pointer;
}
select:hover, .btn:hover, .toggle:hover { border-color: var(--accent-dim); }
select:focus-visible, .btn:focus-visible, .toggle:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

.btn.primary { background: var(--accent-dim); border-color: var(--accent); color: #eaf7ff; }
.btn.primary:hover { background: var(--accent); color: #06202b; }
.btn.small { padding: 3px 7px; font-size: 11px; }
.btn:disabled, .toggle:disabled { opacity: .45; cursor: not-allowed; }

.toggle.on { border-color: var(--accent); color: var(--accent); }
.toggle.off { color: var(--muted); }

.separator { width: 1px; height: 22px; background: var(--line); }

/* ---- layout ---- */

.layout {
  display: grid;
  grid-template-columns: 288px minmax(0, 1fr);
  height: calc(100% - 48px);
}

.sidebar {
  background: var(--panel);
  border-right: 1px solid var(--line);
  overflow-y: auto;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.panel {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px;
}
.panel h2 {
  margin: 0 0 8px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .8px;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 6px;
}
.badge {
  background: var(--line);
  color: var(--text);
  border-radius: 8px;
  padding: 0 6px;
  font-size: 10px;
  font-variant-numeric: tabular-nums;
}

/* ---- file list ---- */

.file-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 2px; }
.file-row {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 5px 6px;
  border-radius: 4px;
  cursor: pointer;
  border: 1px solid transparent;
}
.file-row:hover { background: #252a35; }
.file-row.selected { background: #232a38; border-color: var(--accent-dim); }
.file-row input[type=checkbox] { margin: 0; accent-color: var(--accent-dim); flex: none; }
.file-swatch { width: 9px; height: 9px; border-radius: 2px; flex: none; }
.file-name {
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: 12px;
}
.file-remove {
  flex: none;
  border: 0;
  background: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
  padding: 0 2px;
  opacity: 0;
}
.file-row:hover .file-remove { opacity: 1; }
.file-remove:hover { color: var(--error); }

.empty, .hint { color: var(--muted); font-size: 11.5px; margin: 4px 0 0; }
.hint code { background: #000; padding: 0 3px; border-radius: 3px; }

/* ---- metadata ---- */

.metadata { display: grid; grid-template-columns: auto 1fr; gap: 3px 10px; margin: 0; font-size: 12px; }
.metadata dt { color: var(--muted); }
.metadata dd { margin: 0; text-align: right; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.metadata dd.muted { color: var(--muted); }

/* ---- reference lines ---- */

.ref-list { list-style: none; margin: 0 0 8px; padding: 0; display: flex; flex-direction: column; gap: 3px; }
.ref-row { display: flex; align-items: center; gap: 6px; font-size: 12px; }
.ref-row input[type=color] { width: 20px; height: 18px; padding: 0; border: 1px solid var(--line); background: none; }
.ref-row input[type=text] { width: 62px; }
.ref-row input[type=number] { width: 62px; }
.ref-row input { background: var(--bg); color: var(--text); border: 1px solid var(--line); border-radius: 4px; padding: 2px 4px; font: inherit; font-size: 11px; }
.ref-row .ref-remove { border: 0; background: none; color: var(--muted); cursor: pointer; }
.ref-row .ref-remove:hover { color: var(--error); }
.ref-actions { display: flex; gap: 6px; }

/* ---- plot stage ---- */

.stage { display: flex; flex-direction: column; min-width: 0; padding: 10px 12px 0; }

.plot-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; min-height: 24px; }
.plot-head h1 { margin: 0; font-size: 13px; font-weight: 600; color: var(--text); }
.legend { display: flex; flex-wrap: wrap; gap: 10px; font-size: 11.5px; color: var(--muted); }
.legend .item { display: flex; align-items: center; gap: 5px; }
.legend .swatch { width: 9px; height: 9px; border-radius: 2px; }
.legend .annotation { font-family: var(--mono); color: var(--text); }

.plot-host {
  position: relative;
  flex: 1;
  min-height: 200px;
  margin-top: 6px;
  background: #0d0f14;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.plot-host .uplot { position: absolute; inset: 0; width: 100% !important; height: 100% !important; }
.plot-host canvas.heatmap { position: absolute; inset: 0; width: 100%; height: 100%; cursor: crosshair; }

.placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--muted);
  gap: 6px;
  padding: 20px;
}
.ph-title { font-size: 15px; color: var(--text); margin: 0; }
.ph-body { margin: 0; max-width: 44ch; font-size: 12px; }
.ph-body code { background: #000; padding: 0 3px; border-radius: 3px; }

.statusbar {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 6px 2px;
  font-size: 11.5px;
  color: var(--muted);
  min-height: 24px;
}
.status.working { color: var(--accent); }
.status.error { color: var(--error); }
.status.warn { color: var(--warn); }
.timing { font-family: var(--mono); }

/* ---- drag & drop ---- */

.drop-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 20, 30, .82);
  border: 3px dashed var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--accent);
  z-index: 40;
}

/* ---- tooltip ---- */

.tooltip {
  position: fixed;
  background: #05070b;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 5px 7px;
  font: 11px/1.4 var(--mono);
  color: var(--text);
  pointer-events: none;
  z-index: 30;
  white-space: nowrap;
}