body {
  font-family: Arial, sans-serif;
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
  text-align: center;
}

.subtitle {
  color: #666;
  font-style: italic;
  margin-top: -8px;
}

.lead {
  font-size: 1.1em;
  margin: 22px auto 18px;
  max-width: 640px;
}

blockquote {
  text-align: left;
  max-width: 640px;
  margin: 14px auto;
  padding: 2px 0 2px 16px;
  border-left: 3px solid #ddd;
  color: #444;
}

blockquote p {
  margin: 8px 0;
}

blockquote cite {
  display: block;
  font-size: 0.85em;
  color: #888;
  font-style: normal;
  margin-top: 6px;
}

#controls {
  margin: 20px 0;
}

#presets {
  margin-bottom: 10px;
}

button {
  padding: 10px 16px;
  font-size: 1em;
  margin: 4px;
  cursor: pointer;
  border: 1px solid #999;
  border-radius: 6px;
  background: #f5f5f5;
}

button.preset.active {
  background: #333;
  color: #fff;
  border-color: #333;
}

#stop {
  background: #fbe4e4;
  border-color: #c66;
}

#now-playing {
  min-height: 1.2em;
  font-style: italic;
  color: #555;
}

.hint {
  font-size: 0.85em;
  color: #888;
  margin: 8px 0 4px;
}

.hint code {
  background: #f0f0f0;
  padding: 1px 4px;
  border-radius: 3px;
}

.toggle {
  font-size: 0.85em;
  color: #666;
  cursor: pointer;
}

#chord-display {
  min-height: 2.2em;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 10px;
  margin-top: 4px;
}

#chord-roman {
  font-size: 1.1em;
  font-weight: bold;
  color: #333;
  min-width: 2.5em;
}

#chord-name {
  font-size: 1.6em;
  font-weight: bold;
  color: #111;
}

#chord-key {
  font-size: 0.9em;
  font-style: italic;
  color: #888;
}

#progression-strip {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.chip {
  padding: 3px 9px;
  border-radius: 12px;
  border: 1px solid #ccc;
  background: #f5f5f5;
  color: #888;
  font-size: 0.85em;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.chip.current {
  background: #333;
  color: #fff;
  border-color: #333;
}

#tonnetz-panel {
  background: #111;
  border-radius: 10px;
  padding: 10px;
  margin: 20px auto;
  max-width: 100%;
  overflow-x: auto;
  border: 2px solid transparent;
  transition: border-color 0.15s ease;
}

#tonnetz-panel.drop-target {
  border-color: #5b6fe0;
}

#tonnetz {
  display: block;
  width: 100%;
  height: auto;
  min-width: 480px;
}

.idle-dot {
  fill: #666;
  transition: opacity 0.25s ease;
}

.note-circle {
  fill: #dce9ff;
  stroke: none;
  transition: opacity 0.2s ease, r 0.2s ease;
}

.note-label {
  fill: #777;
  font-size: 9px;
  text-anchor: middle;
  font-family: Arial, sans-serif;
  pointer-events: none;
  opacity: 0; /* the paper's running visualization is unlabelled */
}

#tonnetz.show-labels .note-label {
  opacity: 1;
}

.interval-line {
  stroke: #d8b657;
  stroke-width: 1.5;
  opacity: 0;
  transition: opacity 0.25s ease;
}

.triad {
  fill: #5b6fe0;
  fill-opacity: 0.75;
  stroke: #b9c3ff;
  stroke-width: 0.5;
  opacity: 0;
  transition: opacity 0.3s ease;
}

#tracks {
  margin-top: 10px;
}

button.track.active {
  background: #333;
  color: #fff;
  border-color: #333;
}

#track-note {
  min-height: 1.1em;
  max-width: 620px;
  margin: 6px auto 0;
}

#score-panel {
  background: #fff;
  border: 1px solid #e2e2e2;
  border-radius: 10px;
  margin: 16px auto;
  padding: 8px;
  max-height: 420px;
  overflow-y: auto;
}

#options {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-top: 6px;
}

#tempo {
  vertical-align: middle;
  width: 130px;
}

#tempo-label {
  font-variant-numeric: tabular-nums;
}