:root {
  --lab-ink: #11203b;
  --lab-subtle: #5e728f;
  --lab-surface: rgba(255, 255, 255, 0.88);
  --lab-surface-strong: #ffffff;
  --lab-line: rgba(17, 32, 59, 0.12);
  --lab-primary: #1f6feb;
  --lab-primary-deep: #0e4db3;
  --lab-secondary: #00a38c;
  --lab-accent: #f97316;
  --lab-alert: #d9485f;
  --lab-violet: #7c3aed;
  --lab-shadow: 0 20px 48px rgba(32, 63, 109, 0.12);
  --lab-radius-xl: 24px;
  --lab-radius-lg: 18px;
  --lab-radius-md: 12px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "Space Grotesk", sans-serif;
  color: var(--lab-ink);
  background:
    radial-gradient(circle at top left, rgba(31, 111, 235, 0.18), transparent 28%),
    radial-gradient(circle at top right, rgba(0, 163, 140, 0.18), transparent 32%),
    linear-gradient(180deg, #f8fbff 0%, #eef4fb 42%, #edf1f8 100%);
}

.container {
  width: min(1380px, calc(100% - 28px));
  margin: 0 auto;
}

.lab-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(16px);
  background: rgba(248, 251, 255, 0.78);
  border-bottom: 1px solid rgba(17, 32, 59, 0.08);
}

.lab-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 12px 0;
}

.lab-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: inherit;
  text-decoration: none;
}

.lab-brand img {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  box-shadow: 0 8px 20px rgba(31, 111, 235, 0.18);
}

.lab-brand-title,
.lab-brand-subtitle {
  display: block;
}

.lab-brand-title {
  font-size: 1rem;
  font-weight: 700;
}

.lab-brand-subtitle {
  color: var(--lab-subtle);
  font-size: 0.82rem;
}

.lab-links {
  display: flex;
  align-items: center;
  gap: 16px;
}

.lab-links a {
  color: var(--lab-subtle);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
}

.lab-links a:hover {
  color: var(--lab-primary);
}

.lab-shell {
  padding: 12px 0 20px;
}

.lab-toolbar,
.panel {
  background: var(--lab-surface);
  border: 1px solid rgba(255, 255, 255, 0.65);
  box-shadow: var(--lab-shadow);
  border-radius: var(--lab-radius-xl);
}

.lab-toolbar {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(320px, 0.95fr) minmax(235px, 0.68fr);
  gap: 14px;
  align-items: stretch;
  padding: 14px 16px;
}

.panel-eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--lab-secondary);
  margin: 0 0 6px;
}

.lab-toolbar-copy h1 {
  margin: 0;
  font-size: clamp(1.1rem, 2vw, 1.65rem);
  line-height: 1.08;
  max-width: 28ch;
}

.toolbar-note {
  margin: 8px 0 0;
  color: var(--lab-subtle);
  font-size: 0.82rem;
  line-height: 1.45;
  max-width: 60ch;
}

.lab-toolbar-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-content: start;
}

.lab-toolbar-actions .primary-action,
.lab-toolbar-actions .secondary-action {
  flex: 1 1 140px;
}

.lab-toolbar-actions .drop-zone {
  flex-basis: 100%;
}

.lab-toolbar-meta {
  display: flex;
  flex-direction: column;
  gap: 10px;
  justify-content: space-between;
}

.toolbar-meta-card {
  border-radius: var(--lab-radius-lg);
  border: 1px solid rgba(17, 32, 59, 0.08);
  background: rgba(17, 32, 59, 0.04);
  padding: 10px 12px;
  font-family: "IBM Plex Mono", monospace;
  color: var(--lab-subtle);
  min-height: 62px;
  font-size: 0.78rem;
  line-height: 1.45;
}

.primary-action,
.secondary-action,
.secondary-button,
.play-toggle {
  border: none;
  border-radius: 999px;
  padding: 8px 12px;
  font: inherit;
  font-size: 0.86rem;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, color 0.18s ease;
}

.primary-action,
.play-toggle {
  background: linear-gradient(135deg, var(--lab-primary) 0%, var(--lab-primary-deep) 100%);
  color: #fff;
  box-shadow: 0 12px 22px rgba(31, 111, 235, 0.22);
}

.secondary-action,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(17, 32, 59, 0.06);
  color: var(--lab-ink);
  text-decoration: none;
  border: 1px solid rgba(17, 32, 59, 0.08);
}

.primary-action:hover,
.secondary-action:hover,
.secondary-button:hover,
.play-toggle:hover {
  transform: translateY(-1px);
}

button:disabled,
input:disabled,
select:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.drop-zone {
  border: 1.5px dashed rgba(31, 111, 235, 0.32);
  background: rgba(31, 111, 235, 0.05);
  border-radius: var(--lab-radius-lg);
  padding: 10px 12px;
  min-height: 58px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--lab-subtle);
  font-size: 0.82rem;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.drop-zone.active {
  border-color: var(--lab-secondary);
  background: rgba(0, 163, 140, 0.08);
  transform: translateY(-1px);
}

.drop-hint {
  margin: 0;
  color: var(--lab-subtle);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  line-height: 1.45;
}

.lab-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.42fr) minmax(290px, 0.74fr) minmax(380px, 0.98fr);
  grid-template-areas: "timeline inspector editor";
  gap: 14px;
  margin-top: 14px;
  align-items: start;
}

.timeline-panel { grid-area: timeline; }
.inspector-panel { grid-area: inspector; }
.editor-panel { grid-area: editor; }

.panel {
  padding: 14px;
  min-height: 0;
}

.panel-header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 10px;
}

.panel-header h2,
.events-header h3 {
  margin: 0;
  font-size: 1rem;
}

.panel-meta,
.editor-hint,
.algorithm-status,
.debug-output {
  color: var(--lab-subtle);
}

.canvas-frame {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.82), rgba(243, 247, 253, 0.9)),
    linear-gradient(90deg, rgba(17, 32, 59, 0.03) 1px, transparent 1px),
    linear-gradient(180deg, rgba(17, 32, 59, 0.03) 1px, transparent 1px);
  background-size: auto, 90px 100%, 100% 72px;
  border: 1px solid rgba(17, 32, 59, 0.08);
  border-radius: var(--lab-radius-lg);
  padding: 8px;
}

#waveform-canvas {
  width: 100%;
  height: auto;
  display: block;
}

.timeline-toolbar {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  gap: 8px;
  align-items: center;
  margin-top: 8px;
}

.time-slider {
  width: 100%;
}

.time-readout,
.speed-picker,
.legend,
.events-shell,
.editor-hint,
.debug-output,
code,
textarea {
  font-family: "IBM Plex Mono", monospace;
}

.time-readout {
  font-size: 0.82rem;
  color: var(--lab-subtle);
}

.speed-picker {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
}

.speed-picker select {
  border: 1px solid rgba(17, 32, 59, 0.12);
  border-radius: 10px;
  padding: 6px 9px;
  font: inherit;
  background: rgba(255, 255, 255, 0.95);
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
  font-size: 0.68rem;
  color: var(--lab-subtle);
  margin-top: 8px;
}

.legend-chip {
  display: inline-block;
  width: 11px;
  height: 11px;
  border-radius: 999px;
  margin-right: 5px;
  vertical-align: middle;
}

.legend-raw { background: #4f7cff; }
.legend-smooth { background: var(--lab-secondary); }
.legend-threshold { background: var(--lab-accent); }
.legend-high { background: var(--lab-alert); }
.legend-pair { background: var(--lab-violet); }
.legend-playhead { background: #111111; }

.inspector-panel {
  position: sticky;
  top: 76px;
  max-height: calc(100vh - 92px);
  overflow: auto;
}

.editor-panel {
  position: sticky;
  top: 76px;
  max-height: calc(100vh - 92px);
  overflow: auto;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
  margin-bottom: 10px;
}

.stat-card {
  background: var(--lab-surface-strong);
  border: 1px solid rgba(17, 32, 59, 0.08);
  border-radius: var(--lab-radius-md);
  padding: 10px;
}

.stat-label {
  display: block;
  font-size: 0.72rem;
  color: var(--lab-subtle);
  margin-bottom: 4px;
}

.stat-card strong {
  font-size: 1.08rem;
  line-height: 1.15;
}

.events-shell {
  background: rgba(17, 32, 59, 0.04);
  border-radius: var(--lab-radius-lg);
  padding: 10px;
}

.event-list {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  display: grid;
  gap: 6px;
  max-height: 280px;
  overflow: auto;
}

.event-list li {
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(17, 32, 59, 0.08);
  padding: 8px 9px;
  transition: border-color 0.2s ease, background 0.2s ease;
  font-size: 0.78rem;
}

.event-list li.active {
  border-color: rgba(31, 111, 235, 0.28);
  background: rgba(31, 111, 235, 0.08);
}

.event-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 2px 7px;
  font-size: 0.67rem;
  margin-bottom: 6px;
}

.event-tag.high {
  background: rgba(217, 72, 95, 0.12);
  color: #b72f48;
}

.event-tag.pair {
  background: rgba(124, 58, 237, 0.12);
  color: #6d28d9;
}

.event-time {
  color: var(--lab-subtle);
  font-size: 0.69rem;
  margin-top: 4px;
}

.editor-hint {
  margin: 0 0 8px;
  font-size: 0.72rem;
  line-height: 1.45;
}

#algorithm-editor {
  width: 100%;
  height: clamp(300px, 50vh, 520px);
  min-height: 280px;
  border: 1px solid rgba(17, 32, 59, 0.12);
  background: #0f172a;
  color: #e2e8f0;
  border-radius: var(--lab-radius-lg);
  padding: 12px;
  resize: vertical;
  font-size: 0.74rem;
  line-height: 1.46;
}

.editor-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
}

.autorun-toggle {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--lab-subtle);
  font-size: 0.82rem;
}

.algorithm-status {
  padding: 6px 9px;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 700;
}

.algorithm-status.neutral {
  background: rgba(17, 32, 59, 0.06);
}

.algorithm-status.success {
  background: rgba(0, 163, 140, 0.12);
  color: #0c7667;
}

.algorithm-status.error {
  background: rgba(217, 72, 95, 0.12);
  color: #b72f48;
}

.debug-output {
  margin: 10px 0 0;
  border-radius: var(--lab-radius-lg);
  border: 1px solid rgba(17, 32, 59, 0.08);
  background: rgba(17, 32, 59, 0.04);
  padding: 10px;
  font-size: 0.68rem;
  line-height: 1.45;
  white-space: pre-wrap;
  min-height: 100px;
  max-height: 170px;
  overflow: auto;
}

@media (max-width: 1240px) {
  .lab-toolbar {
    grid-template-columns: 1fr;
  }

  .lab-grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(305px, 0.82fr);
    grid-template-areas:
      "timeline inspector"
      "editor inspector";
  }

  .inspector-panel,
  .editor-panel {
    position: static;
    max-height: none;
    overflow: visible;
  }
}

@media (max-width: 900px) {
  .lab-grid {
    grid-template-columns: 1fr;
    grid-template-areas:
      "timeline"
      "inspector"
      "editor";
  }
}

@media (max-width: 760px) {
  .container {
    width: min(100%, calc(100% - 18px));
  }

  .lab-nav {
    flex-wrap: wrap;
    justify-content: center;
  }

  .lab-links {
    flex-wrap: wrap;
    justify-content: center;
  }

  .timeline-toolbar {
    grid-template-columns: 1fr;
  }

  .lab-toolbar-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .stat-grid {
    grid-template-columns: 1fr;
  }

  .panel,
  .lab-toolbar {
    padding: 14px;
  }
}