/* ── Tab overrides ───────────────────────────────────── */
#tab-mix.active {
  border-color: #4fc3f7;
  color: #4fc3f7;
}

/* ── Track View Wrapper ─────────────────────────────── */
.tv-wrap {
  display: flex;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

/* ── Labels (sidebar sinistra fissa) ────────────────── */
.tv-labels {
  width: 140px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  background: rgba(32,32,42,0.8);
  border-right: 1px solid var(--border-subtle);
  overflow: hidden;
}

/* Riga della fascia dedicata al loop: la sua altezza è LOOP_BAND_H di
   track-view.js — sommata a .tv-corner dà TOP_H, la quota da cui partono le
   corsie del canvas. Cambiarne una sola sfasa tutte le tracce. */
.tv-bandlabel {
  height: 14px; /* LOOP_BAND_H */
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: 0 6px;
  background: rgba(24,24,30,0.9);
  border-bottom: 1px solid var(--border-subtle);
  color: var(--accent-loop);
  font-family: var(--font-ui);
  font-size: 8px;
  letter-spacing: 0.14em;
}

.tv-corner {
  height: 28px; /* RULER_H */
  border-bottom: 1px solid var(--border-subtle);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 4px;
  padding: 0 6px;
}

.tv-corner::before {
  content: 'GRID';
  color: var(--text-muted);
  font-family: var(--font-ui);
  font-size: 9px;
  letter-spacing: 0.08em;
}

.tv-grid {
  background: var(--bg-control);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  padding: 1px 2px;
  cursor: pointer;
  outline: none;
}

.tv-grid:hover {
  border-color: var(--border-strong);
  color: var(--text-primary);
}

.tv-track-label {
  height: 56px; /* TRACK_H */
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  padding: 0 8px;
  border-bottom: 1px solid var(--border-subtle);
  flex-shrink: 0;
}

.tv-track-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
  position: absolute;
  left: 6px;
  top: 50%;
  transform: translateY(-50%);
}

.tv-track-label {
  position: relative;
  padding-left: 20px; /* spazio per il dot */
}

.tv-track-name {
  background: transparent;
  border: none;
  border-bottom: 1px solid transparent;
  color: var(--text-secondary);
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  width: 100%;
  padding: 1px 2px;
  outline: none;
}

.tv-track-name:focus {
  border-bottom-color: var(--border-subtle);
  color: var(--text-primary);
}

.tv-track-source {
  color: var(--text-muted);
  font-size: 9px;
  font-family: var(--font-mono);
  padding: 0 2px;
  width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── Timeline Scroll Area ───────────────────────────── */
.tv-scroll {
  flex: 1;
  overflow-x: auto;
  overflow-y: hidden;
  cursor: crosshair;
}

.tv-scroll::-webkit-scrollbar {
  height: 8px;
}
.tv-scroll::-webkit-scrollbar-track {
  background: var(--bg-app);
}
.tv-scroll::-webkit-scrollbar-thumb {
  background: var(--bg-elevated);
  border-radius: 4px;
}
.tv-scroll::-webkit-scrollbar-thumb:hover {
  background: var(--border-strong);
}

.tv-canvas {
  display: block;
}

/* ── Slot Picker Popup ──────────────────────────────── */
.tv-slot-picker {
  position: fixed;
  z-index: 1000;
  background: var(--bg-panel);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  overflow: hidden;
  min-width: 160px;
  max-height: 200px;
  overflow-y: auto;
  box-shadow: 0 4px 16px rgba(0,0,0,0.4);
}

.tv-slot-option {
  display: block;
  width: 100%;
  padding: 6px 12px;
  background: none;
  border: none;
  text-align: left;
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  color: var(--text-secondary);
  cursor: pointer;
}

.tv-slot-option:hover {
  background: var(--bg-elevated);
  color: var(--text-primary);
}

/* ── Context Menu ───────────────────────────────────── */
.tv-ctx-menu {
  position: fixed;
  z-index: 1000;
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  overflow: hidden;
  min-width: 120px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.tv-ctx-item {
  padding: 6px 12px;
  font-size: var(--text-xs);
  color: var(--text-secondary);
  cursor: pointer;
}

.tv-ctx-item:hover {
  background: var(--bg-elevated);
  color: var(--text-primary);
}

/* Voci inerti: strumenti diversi dalla sorgente della traccia dedicata */
.tv-ctx-item.disabled,
.tv-slot-option.disabled {
  font-style: italic;
  opacity: 0.4;
  cursor: default;
  pointer-events: none;
}

.tv-ctx-item.disabled:hover,
.tv-slot-option.disabled:hover {
  background: none;
  color: var(--text-secondary);
}

.tv-ctx-parent {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.tv-ctx-arrow {
  color: var(--text-muted);
  font-size: 11px;
}

.tv-ctx-sep {
  height: 1px;
  margin: 2px 0;
  background: var(--border-subtle);
}

/* Selettore del parametro di automazione: la voce della lane corrente.
   La spunta è in CSS (::after) e non nel testo: i test e gli screen reader
   leggono il textContent pulito. */
.tv-ctx-item.checked {
  color: #4fc3f7;
}
.tv-ctx-item.checked::after {
  content: '✓';
  float: right;
  margin-left: 12px;
}

/* Con 16 piste (linear-drums, Fase 6) il selettore uscirebbe dallo schermo:
   stessi limiti del submenu (.tv-ctx-submenu). */
.tv-param-menu {
  max-height: 240px;
  overflow-y: auto;
}

/* ── Submenu slot (livello 2 del menu di inserimento) ───────── */
.tv-ctx-submenu {
  position: fixed;
  z-index: 1001;
  background: var(--bg-panel);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  min-width: 160px;
  max-height: 240px;
  overflow-y: auto;
  box-shadow: 0 4px 16px rgba(0,0,0,0.4);
}

/* ── Toast ──────────────────────────────────────────────────── */
.tv-toast {
  position: fixed;
  left: 50%;
  bottom: 48px;
  transform: translateX(-50%);
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  padding: 6px 14px;
  z-index: 2000;
  pointer-events: none;
  white-space: nowrap;
}

/* ── Sidebar View Tabs ──────────────────────────────── */
.sidebar-view-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  flex-shrink: 0;
}

.sidebar-tab {
  flex: 1;
  padding: 5px 0;
  background: transparent;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: var(--text-xs);
  font-family: var(--font-ui);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  cursor: pointer;
  transition: var(--transition-fast);
}

.sidebar-tab:hover {
  color: var(--text-secondary);
  border-color: var(--border-strong);
}

.sidebar-tab.active {
  background: var(--bg-elevated);
  border-color: var(--accent-play);
  color: var(--text-primary);
}

#tab-tracks.active {
  border-color: #23d18b;
  color: #23d18b;
}

#tab-instruments.active {
  border-color: #f0b429;
  color: #f0b429;
}

.tv-track-mute, .tv-track-solo, .tv-track-auto {
  width: 16px; height: 16px;
  font-size: 8px; font-weight: 700;
  background: var(--bg-control);
  border: 1px solid var(--border-subtle);
  border-radius: 2px;
  color: var(--text-muted);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  line-height: 1;
  padding: 0;
}
.tv-track-mute:hover { border-color: var(--accent-rec); }
.tv-track-solo:hover { border-color: #f0b429; }
.tv-track-mute.active       { background: var(--accent-rec); color: #fff; border-color: var(--accent-rec); }
.tv-track-solo.active       { background: #f0b429; color: #000; border-color: #f0b429; }
.tv-track-mute.active:hover { background: var(--accent-rec); color: #fff; border-color: var(--accent-rec); }
.tv-track-solo.active:hover { background: #f0b429; color: #000; border-color: #f0b429; }
.tv-track-auto:hover        { border-color: #4fc3f7; }
.tv-track-auto.active       { background: #4fc3f7; color: #000; border-color: #4fc3f7; }
.tv-track-auto.active:hover { background: #4fc3f7; color: #000; border-color: #4fc3f7; }

/* Traccia non dedicata: registry dei parametri vuoto, niente da automatizzare.
   Il tooltip (da _syncLaneUI) spiega il perché. */
.tv-track-auto:disabled,
.tv-track-auto:disabled:hover {
  opacity: 0.35;
  cursor: default;
  background: var(--bg-control);
  color: var(--text-muted);
  border-color: var(--border-subtle);
}

/* Riga con la lane di automazione aperta: cresce di LANE_H (64) per restare
   in quota col canvas — height e padding-bottom vanno tenuti in pari con
   LANE_H/TRACK_H di track-view.js (unico punto di sincronia sidebar/canvas).
   Il padding-bottom lascia il contenuto centrato nei 56px della zona blocchi,
   esattamente come a lane chiusa. */
.tv-track-label.lane-open {
  height: 120px; /* TRACK_H + LANE_H */
  padding-bottom: 64px; /* LANE_H */
}

.tv-ms-btns {
  display: flex;
  gap: 2px;
  flex-shrink: 0;
}