/**
 * Metronome block — shared by the practice session and Interleave pages.
 * Pairs with js/metronome.js; the page stylesheet owns the surrounding panel.
 */

.metronome-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
}

.metronome-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
}

.metro-time-sig-label {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 0;
}

.metro-time-sig-text {
  font-size: 10px;
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
}

.metro-time-sig-select {
  min-width: 58px;
  padding: 4px 6px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text-primary);
  font-size: 11px;
  font-weight: 700;
  font-family: var(--font-mono);
  cursor: pointer;
}

.metro-time-sig-select:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.metronome-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 6px 8px;
}

.metro-btn {
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  border: none;
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  color: white;
  transition: transform 0.15s, opacity 0.15s, box-shadow 0.15s;
}

.metro-btn:not(:disabled):hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.metro-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  transform: none;
}

.metro-btn.metro-start {
  background: linear-gradient(135deg, #22c55e, #16a34a);
}

.metro-btn.metro-stop {
  background: linear-gradient(135deg, #f87171, #ef4444);
}

.metro-btn.metro-tap {
  background: linear-gradient(135deg, #fb923c, #ea580c);
  min-width: 52px;
}

.metro-btn.metro-tap:not(:disabled):active,
.metro-btn.metro-tap.metro-tap-pulse {
  transform: scale(0.97);
  box-shadow: 0 0 0 2px rgba(234, 88, 12, 0.28);
}

.metro-step-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text-primary);
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, color 0.15s;
  flex-shrink: 0;
}

.metro-step-btn:not(:disabled):hover {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.metro-step-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.metro-bpm-group {
  display: flex;
  align-items: center;
  gap: 6px;
  justify-content: center;
}

.metro-bpm-display {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
  min-width: 88px;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  font-family: var(--font-mono);
  transition: border-color 0.1s, box-shadow 0.1s, transform 0.1s;
}

.metro-bpm-display.metro-pulse {
  transform: scale(1.04);
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(30, 110, 181, 0.15);
}

.metro-bpm-display.metro-accent {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(30, 110, 181, 0.22);
}

.metro-bpm-display:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(30, 110, 181, 0.12);
}

.metro-bpm-input {
  width: 44px;
  padding: 0;
  border: none;
  background: transparent;
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  font-family: var(--font-mono);
  text-align: center;
  line-height: 1;
  -moz-appearance: textfield;
  appearance: textfield;
}

.metro-bpm-input::-webkit-outer-spin-button,
.metro-bpm-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.metro-bpm-input:focus {
  outline: none;
}

.metro-bpm-input:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.metro-bpm-unit {
  font-size: 10px;
  font-weight: 600;
  color: var(--text-muted);
}

.metro-beat-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--border);
  align-self: center;
  margin-right: 2px;
  transition: background 0.1s, transform 0.1s;
}

.metro-bpm-display.metro-pulse .metro-beat-dot {
  background: var(--accent);
  transform: scale(1.3);
}

.metro-bpm-display.metro-accent .metro-beat-dot {
  background: var(--accent);
  transform: scale(1.5);
}