:root {
  color-scheme: dark;
  --bg: #101418;
  --panel: #1a2028;
  --panel-border: #2a323d;
  --text: #eef2f6;
  --text-dim: #8a96a3;
  --accent: #d4a94c;
  --accent-dim: #7a6535;
  --danger: #c9584f;
  --tetra-lower: #5b9bd5;
  --tetra-lower-dim: rgba(91, 155, 213, 0.16);
  --tetra-upper: #d4a94c;
  --tetra-upper-dim: rgba(212, 169, 76, 0.16);
  --score-label-width: 64px;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  min-height: 100dvh;
  padding: 16px;
  padding-top: calc(16px + env(safe-area-inset-top, 0px));
  padding-bottom: calc(16px + env(safe-area-inset-bottom, 0px));
  gap: 16px;
}

img {
  max-width: 100%;
}

[hidden] {
  display: none !important;
}

header.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

header.app-header h1 {
  font-size: 1.1rem;
  margin: 0;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.header-links {
  display: flex;
  gap: 8px;
}

.nav-link {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.9rem;
  border: 1px solid var(--panel-border);
  padding: 6px 12px;
  border-radius: 999px;
}

.cant-hear-toggle {
  display: block;
  width: 100%;
  padding: 10px;
  border-radius: 12px;
  border: 1px solid var(--danger);
  background: transparent;
  color: var(--danger);
  font-size: 0.9rem;
  font-weight: 700;
}

.cant-hear-panel {
  margin-top: 12px;
  padding: 14px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
}

.cant-hear-panel .primary-button {
  margin: 10px 0;
}

.control-group {
  margin-bottom: 16px;
}

.control-group:last-child {
  margin-bottom: 0;
}

.help-content p,
.help-content ul {
  margin: 0 0 12px;
  line-height: 1.5;
  color: var(--text-dim);
}

.help-content p:last-child,
.help-content ul:last-child {
  margin-bottom: 0;
}

.help-content strong {
  color: var(--text);
}

.help-content ul {
  padding-left: 1.2em;
}

.help-content li {
  margin-bottom: 6px;
}

.help-content li:last-child {
  margin-bottom: 0;
}

.inline-link {
  color: var(--accent);
}

.help-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 12px;
  font-size: 0.9rem;
}

.help-table th,
.help-table td {
  text-align: left;
  padding: 8px;
  border-bottom: 1px solid var(--panel-border);
}

.help-table th {
  color: var(--text-dim);
  font-weight: 600;
}

.help-table td {
  color: var(--text);
}

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 20px;
  min-height: 0;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  padding: 16px;
}

.tetrachord-toggle {
  display: flex;
  gap: 8px;
}

.tetrachord-toggle button {
  flex: 1;
  padding: 14px;
  border-radius: 12px;
  border: 1px solid var(--panel-border);
  background: transparent;
  color: var(--text-dim);
  font-size: 1rem;
  font-weight: 600;
}

.tetrachord-toggle button.active {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--text);
}

.note-list {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  margin-top: 12px;
}

.note-list .note-chip {
  flex: 1;
  text-align: center;
  padding: 8px 4px;
  border-radius: 10px;
  border: none;
  background: rgba(255, 255, 255, 0.04);
  font-family: inherit;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.note-list .note-chip:active {
  background: var(--accent-dim);
  color: var(--text);
}

.note-list .note-chip strong {
  display: block;
  color: var(--text);
  font-size: 1rem;
}

.stage {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  min-height: 200px;
}

#note-flash {
  font-size: min(28vw, 180px);
  font-weight: 800;
  color: var(--accent);
  opacity: 0;
  transform: scale(0.85);
  transition: none;
}

#note-flash.show {
  opacity: 1;
  transform: scale(1);
  transition: opacity 0.08s ease-out, transform 0.08s ease-out;
}

.primary-button {
  display: block;
  width: 100%;
  padding: 16px;
  border-radius: 14px;
  border: none;
  background: var(--accent);
  color: #201802;
  font-size: 1.05rem;
  font-weight: 700;
}

.primary-button:disabled {
  opacity: 0.5;
}

.status-line {
  text-align: center;
  color: var(--text-dim);
  font-size: 0.9rem;
  min-height: 1.2em;
}

.readout-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  font-variant-numeric: tabular-nums;
}

.readout-grid .readout-item {
  background: rgba(255, 255, 255, 0.04);
  border-radius: 10px;
  padding: 10px;
}

.readout-item .label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.readout-item .value {
  font-size: 1.1rem;
  font-weight: 600;
}

.slider-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 16px;
}

.slider-row:last-child {
  margin-bottom: 0;
}

.slider-row .slider-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.slider-row .slider-label span.value {
  color: var(--text);
  font-weight: 600;
}

.slider-row input[type='range'] {
  width: 100%;
  accent-color: var(--accent);
}

.gesture-log {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 220px;
  overflow-y: auto;
  display: flex;
  flex-direction: column-reverse;
  gap: 6px;
}

.gesture-log li {
  background: rgba(255, 255, 255, 0.04);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 0.85rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  row-gap: 2px;
}

.gesture-log li .gesture-name {
  color: var(--accent);
  font-weight: 700;
  text-transform: uppercase;
}

.gesture-log li .gesture-values {
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
  font-size: 0.8rem;
  flex-basis: 100%;
  order: 3;
}

.gesture-log li .ago {
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
}

.section-title {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  margin: 0 0 10px;
}

.reset-button {
  width: 100%;
  padding: 10px;
  border-radius: 10px;
  border: 1px solid var(--panel-border);
  background: transparent;
  color: var(--text-dim);
  font-size: 0.85rem;
}

.score-main {
  gap: 16px;
}

.song-picker {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.song-picker-btn {
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid var(--panel-border);
  background: transparent;
  color: var(--text-dim);
  font-size: 0.9rem;
  font-weight: 600;
  white-space: nowrap;
}

.song-picker-btn.active {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--text);
}

.score-stage {
  overflow-x: auto;
}

.score-panel {
  min-width: max-content;
}

.score-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.score-title {
  margin: 0;
  font-size: 1.2rem;
}

.score-meta {
  color: var(--text-dim);
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.score-grid-wrap {
  overflow-x: auto;
}

.score-grid {
  display: flex;
  min-width: max-content;
}

.score-label-col {
  display: flex;
  flex-direction: column;
  gap: 2px;
  width: var(--score-label-width);
  flex-shrink: 0;
}

.score-track {
  position: relative;
  flex: 1;
}

.score-cells {
  display: grid;
  gap: 2px;
}

.score-playhead {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 3px;
  margin-left: -1.5px;
  background: var(--danger);
  border-radius: 2px;
  pointer-events: none;
}

.score-row-label {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 10px;
  font-weight: 700;
  font-size: 1rem;
  min-height: 32px;
}

.score-cell {
  min-width: 28px;
  min-height: 32px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 4px;
  position: relative;
}

.score-measure-start {
  border-left: 3px solid var(--text-dim);
}

.score-tetra-lower.score-row-label,
.score-tetra-lower.score-cell {
  color: var(--tetra-lower);
}

.score-tetra-lower.score-cell {
  background: var(--tetra-lower-dim);
}

.score-tetra-upper.score-row-label,
.score-tetra-upper.score-cell {
  color: var(--tetra-upper);
}

.score-tetra-upper.score-cell {
  background: var(--tetra-upper-dim);
}

.score-mark {
  position: absolute;
  inset: 4px;
  border-radius: 6px;
}

.score-mark.score-tetra-lower {
  background: var(--tetra-lower);
}

.score-mark.score-tetra-upper {
  background: var(--tetra-upper);
}

.score-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.score-btn {
  padding: 10px 18px;
  border-radius: 10px;
  border: 1px solid var(--panel-border);
  background: transparent;
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 600;
}

.score-btn-play {
  background: var(--accent);
  border-color: var(--accent);
  color: #201802;
}

.score-tempo {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  min-width: 160px;
}

.score-tempo-label {
  color: var(--text-dim);
  font-size: 0.85rem;
  white-space: nowrap;
}

.score-tempo input[type='range'] {
  flex: 1;
  accent-color: var(--accent);
}

.score-tempo-value {
  color: var(--text);
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  min-width: 4.5em;
}

.score-beat-counter {
  color: var(--text-dim);
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}