.chord-tangent-explorer {
  display: grid;
  gap: var(--space-4, 1rem);
  min-width: 0;
}

.chord-tangent-explorer__controls {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(190px, 0.75fr) minmax(360px, 1.6fr);
  gap: var(--space-3, 0.75rem);
  align-items: end;
  padding: var(--space-3, 0.75rem);
  border: 1px solid var(--color-border-subtle, #d7dde8);
  border-radius: var(--radius-lg, 16px);
  background: var(--color-surface-raised, #fff);
}

.chord-tangent-explorer__control-label {
  display: grid;
  gap: 0.35rem;
  font-weight: 700;
}

.chord-tangent-explorer__select {
  width: 100%;
  min-height: 44px;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--color-border-strong, #a9b4c5);
  border-radius: var(--radius-md, 10px);
  background: var(--color-surface-raised, #fff);
  color: inherit;
  font: inherit;
}

.chord-tangent-explorer__select:focus-visible {
  outline: 3px solid var(--color-focus, #315efb);
  outline-offset: 2px;
}

.chord-tangent-explorer__readout {
  display: flex;
  justify-content: flex-end;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.chord-tangent-explorer__readout span {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0.28rem 0.62rem;
  border-radius: 999px;
  background: var(--color-surface-muted, #f2f5f9);
  font-variant-numeric: tabular-nums;
  font-size: 0.9rem;
}

.chord-tangent-explorer__card {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--color-border-subtle, #d7dde8);
  border-radius: var(--radius-lg, 16px);
  background: var(--color-surface-raised, #fff);
}

.chord-tangent-explorer__card-heading {
  padding: 0.75rem 0.9rem 0.55rem;
  border-bottom: 1px solid var(--color-border-subtle, #d7dde8);
}

.chord-tangent-explorer__card-title {
  margin: 0;
  font-size: 1rem;
}

.chord-tangent-explorer__expression {
  margin: 0.28rem 0 0;
  color: var(--color-text-muted, #526174);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9rem;
}

.chord-tangent-explorer__diagram {
  min-width: 0;
}

.chord-tangent-explorer__diagram .diagram-primitives__tone--muted {
  color: var(--color-border-strong, #a9b4c5);
}

.chord-tangent-explorer__chord {
  stroke-width: 4;
}

.chord-tangent-explorer__h-line {
  stroke-width: 3;
}

.chord-tangent-explorer__guidance {
  margin: 0;
  padding: 0.75rem 0.9rem;
  border-left: 4px solid var(--color-focus, #315efb);
  border-radius: 0 var(--radius-md, 10px) var(--radius-md, 10px) 0;
  background: var(--color-surface-raised, #fff);
  color: var(--color-text-muted, #526174);
}

@media (max-width: 980px) {
  .chord-tangent-explorer__controls {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .chord-tangent-explorer__readout {
    grid-column: 1 / -1;
    justify-content: flex-start;
  }
}

@media (max-width: 640px) {
  .chord-tangent-explorer__controls {
    grid-template-columns: 1fr;
    align-items: stretch;
  }

  .chord-tangent-explorer__readout {
    grid-column: auto;
    justify-content: flex-start;
  }

  .chord-tangent-explorer__readout span {
    flex: 1 1 145px;
  }

  .chord-tangent-explorer__guidance {
    font-size: 0.94rem;
  }
}