/* ============================================
   RITHM - Sequencer (Drum Machine) Styles
   ============================================ */

.sequencer-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-card);
}

/* ── Transport row ─────────────────────────── */

.seq-transport {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.seq-bpm {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-left: auto;
  min-width: 220px;
}

.seq-bpm-label {
  display: inline-flex;
  align-items: baseline;
  gap: 0.35rem;
  cursor: default;
}

.seq-bpm-value {
  font-family: var(--font-sans);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
  min-width: 3.25ch;
  display: inline-block;
  text-align: right;
}

.seq-bpm-unit {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
}

.seq-bpm-slider {
  flex: 1;
  height: 6px;
  border-radius: 3px;
  background: var(--input-bg);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

.seq-bpm-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.seq-bpm-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  box-shadow: var(--shadow-glow);
}

.seq-bpm-slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  border: none;
}

.seq-bpm-slider:focus-visible {
  box-shadow: var(--shadow-focus);
}

/* ── Buttons (sequencer-local) ─────────────── */

.control-btn {
  background: var(--input-bg);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-fast),
              border-color var(--transition-fast),
              transform var(--transition-fast),
              box-shadow var(--transition-fast),
              color var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.control-btn:hover {
  background: var(--surface-alpha);
  border-color: var(--border-hover);
  transform: translateY(-1px);
}

.control-btn:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

.control-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.control-btn.primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
}

.control-btn.primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  box-shadow: var(--shadow-glow);
}

.control-btn.danger {
  background: var(--danger);
  border-color: var(--danger);
  color: #ffffff;
}

.control-btn.danger:hover {
  background: var(--color-danger-dark);
  border-color: var(--color-danger-dark);
}

.control-btn.danger-outline {
  border-color: rgba(239, 68, 68, 0.35);
  color: var(--danger);
}

.control-btn.danger-outline:hover {
  background: var(--surface-danger);
  border-color: var(--danger);
}

/* ── Grid ──────────────────────────────────── */

.seq-grid-wrapper {
  overflow-x: auto;
  padding-bottom: 0.25rem;
}

.seq-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.4rem;
  min-width: 720px;
}

.seq-row {
  display: grid;
  grid-template-columns: 320px 1fr;
  align-items: center;
  gap: 0.75rem;
}

.seq-row.is-muted {
  opacity: 0.55;
}

.seq-row-controls {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.seq-row-delete {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);
  width: 26px;
  height: 26px;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: color var(--transition-fast),
              background var(--transition-fast),
              border-color var(--transition-fast);
}

.seq-row-delete:hover {
  color: var(--danger);
  background: var(--surface-danger);
  border-color: rgba(239, 68, 68, 0.4);
}

.seq-row-delete:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

.seq-row-delete[hidden] {
  display: none;
}

.seq-row-controls .seq-instrument-select,
.seq-row-controls .seq-note-select {
  flex: 0 0 auto;
  min-width: 0;
  padding: 0.35rem 0.45rem;
  font-size: 0.8rem;
  font-weight: 600;
}

.seq-row-controls .seq-instrument-select {
  width: 108px;
}

.seq-row-controls .seq-note-select {
  width: 68px;
}

.seq-row-controls .seq-note-select.is-hidden {
  display: none;
}

.seq-mute-btn {
  background: var(--input-bg);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  width: 32px;
  height: 32px;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: color var(--transition-fast),
              border-color var(--transition-fast),
              background var(--transition-fast);
}

.seq-mute-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
}

.seq-mute-btn[aria-pressed="true"] {
  background: var(--surface-danger);
  border-color: rgba(239, 68, 68, 0.4);
  color: var(--danger);
}

.seq-mute-btn:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

.seq-volume-slider {
  flex: 1;
  height: 4px;
  border-radius: 2px;
  background: var(--input-bg);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
}

.seq-volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--text-secondary);
  cursor: pointer;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.seq-volume-slider::-webkit-slider-thumb:hover {
  background: var(--primary-light);
  transform: scale(1.2);
}

.seq-volume-slider::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--text-secondary);
  cursor: pointer;
  border: none;
}

.seq-volume-slider:focus-visible {
  box-shadow: var(--shadow-focus);
}

.seq-cells {
  display: grid;
  grid-template-columns: repeat(16, 1fr);
  gap: 4px;
}

.seq-cell {
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  aspect-ratio: 1 / 1;
  min-height: 28px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  cursor: pointer;
  padding: 0;
  transition: background var(--transition-fast),
              border-color var(--transition-fast),
              box-shadow var(--transition-fast),
              transform var(--transition-fast);
}

.seq-cell:hover {
  border-color: var(--primary-light);
  background: var(--surface-primary);
}

.seq-cell:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

.seq-cell.is-beat-start {
  border-left: 2px solid var(--border-hover);
}

.seq-cell.is-bar-start {
  border-left: 3px solid var(--primary);
}

.seq-cell.is-on {
  background: var(--primary);
  border-color: var(--primary);
  box-shadow: 0 0 8px rgba(94, 106, 210, 0.45);
}

.seq-cell.is-on:hover {
  background: var(--primary-light);
}

.seq-cell.is-playing {
  outline: 2px solid var(--warning);
  outline-offset: 1px;
}

.seq-cell.is-on.is-playing {
  background: var(--primary-light);
  box-shadow: 0 0 14px rgba(245, 158, 11, 0.55);
}

/* ── Shape bar (bars / steps-per-bar) ─────── */

.seq-shape-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.seq-shape-group {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.seq-shape-label {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
}

.seq-shape-group .seq-shape-select {
  min-width: 0;
  width: auto;
  flex: 0 0 auto;
  padding: 0.4rem 0.65rem;
  font-size: 0.85rem;
}

.seq-stepper {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.seq-stepper-btn {
  background: var(--input-bg);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 30px;
  height: 30px;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--transition-fast),
              border-color var(--transition-fast),
              color var(--transition-fast);
}

.seq-stepper-btn:hover {
  background: var(--surface-alpha);
  border-color: var(--border-hover);
}

.seq-stepper-btn:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

.seq-stepper-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.seq-stepper-value {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
  min-width: 1.5ch;
  text-align: center;
}

.seq-shape-hint {
  flex-basis: 100%;
  margin: 0;
  font-size: 0.78rem;
  color: var(--text-muted, var(--text-secondary));
}

/* ── Grid footer (Add Row) ─────────────────── */

.seq-grid-footer {
  display: flex;
  justify-content: flex-start;
  margin-top: 0.85rem;
}

.seq-add-row-btn {
  border-style: dashed;
  font-size: 0.85rem;
  padding: 0.5rem 1rem;
}

/* ── Save panel ────────────────────────────── */

.seq-save-panel {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.seq-save-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.seq-save-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  min-width: 56px;
}

.seq-select,
.seq-text-input {
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  color: var(--text-primary);
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  font-size: 0.9rem;
  font-family: inherit;
  min-width: 200px;
  flex: 1;
}

.seq-select:focus-visible,
.seq-text-input:focus-visible {
  outline: none;
  border-color: var(--primary);
  box-shadow: var(--shadow-focus);
}

.seq-save-status {
  font-size: 0.85rem;
  color: var(--text-secondary);
  min-height: 1.2em;
}

.seq-save-status.is-ok {
  color: var(--success);
}

.seq-save-status.is-error {
  color: var(--danger);
}

.seq-signin-hint {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin: 0;
}

.seq-signin-hint a {
  color: var(--primary-light);
  text-decoration: underline;
}

.sequencer-info {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ── Responsive ────────────────────────────── */

@media (max-width: 900px) {
  .seq-row {
    grid-template-columns: 280px 1fr;
  }
  .seq-row-controls .seq-instrument-select {
    width: 92px;
  }
  .seq-row-controls .seq-note-select {
    width: 60px;
  }
}

@media (max-width: 720px) {
  .seq-bpm {
    margin-left: 0;
    width: 100%;
  }
  .seq-row {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }
  .seq-row-controls {
    flex-wrap: wrap;
  }
  .seq-cells {
    gap: 3px;
  }
  .seq-cell {
    min-height: 22px;
  }
  .seq-select,
  .seq-text-input {
    min-width: 0;
    width: 100%;
  }
  .seq-row-controls .seq-instrument-select {
    width: 108px;
  }
  .seq-row-controls .seq-note-select {
    width: 72px;
  }
  .seq-volume-slider {
    flex: 1 1 120px;
  }
}