/* ─── MultitrackPlayer styles ─────────────────────────────────────
   Composant modal plein écran type Moises pour la lecture multipiste
   des stems Demucs. Layout desktop horizontal, mobile cards stackées.
   Cohérent avec le design system Master Hub.
   ───────────────────────────────────────────────────────────── */

.mtp-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: #09090f;
  color: #eeeaf8;
  display: flex;
  flex-direction: column;
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  -webkit-font-smoothing: antialiased;
  animation: mtp-fade-in 0.18s ease-out;
}
@keyframes mtp-fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ── Header ─────────────────────────────────────────────────── */
.mtp-header {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  background: #0f0e18;
  position: relative;
  z-index: 11; /* élève le header au-dessus de la zone tracks pour ombre/border net */
}
.mtp-title {
  flex: 1;
  font-size: 16px;
  font-weight: 700;
  color: #eeeaf8;
  letter-spacing: -0.01em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.mtp-close {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: transparent;
  color: #9d9ab5;
  font-size: 16px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.mtp-close:hover {
  color: #eeeaf8;
  border-color: #8B6FE8;
  background: rgba(139, 111, 232, 0.12);
}

/* ── Preload overlay fullscreen (avant que le modal s'affiche) ─
   Affiché immédiatement au click "Écouter"/"Ouvrir". Disparaît
   en fade out une fois les 6 audios bufferisés ET les peaks
   waveforms calculés. Le modal apparaît ensuite avec waveforms
   dessinés et play prêt — zéro lag perçu. */
.mtp-preload-overlay {
  position: fixed;
  inset: 0;
  z-index: 1100;
  background: rgba(0, 0, 0, 0.85);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  opacity: 1;
  transition: opacity 0.2s ease-out;
}
.mtp-preload-hidden { opacity: 0; pointer-events: none; }
.mtp-preload-spinner {
  width: 48px;
  height: 48px;
  border: 3px solid rgba(255, 255, 255, 0.1);
  border-top-color: #A78BFA;
  border-radius: 50%;
  animation: mtp-spin 0.8s linear infinite;
}
@keyframes mtp-spin { to { transform: rotate(360deg); } }
.mtp-preload-text {
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.55);
  font-family: 'DM Mono', ui-monospace, monospace;
  letter-spacing: 0.04em;
  text-transform: lowercase;
}

/* ── Tracks container ──────────────────────────────────────── */
.mtp-tracks {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
}

/* ── Track row (desktop = horizontal ; mobile = card) ─────── */
.mtp-track {
  display: grid;
  grid-template-columns: 200px 1fr;
  align-items: center;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.mtp-track:last-child { border-bottom: none; }

.mtp-track-ctrls {
  display: flex;
  align-items: center;
  gap: 10px;
}
.mtp-track-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--stem-color, #888);
  width: 70px;
  flex-shrink: 0;
  letter-spacing: -0.01em;
}
.mtp-track-btns {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}
.mtp-mute, .mtp-solo {
  width: 28px;
  height: 26px;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.04);
  color: rgba(255, 255, 255, 0.55);
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.12s;
  letter-spacing: 0.04em;
}
.mtp-mute:hover, .mtp-solo:hover {
  color: #eeeaf8;
  border-color: rgba(255, 255, 255, 0.3);
}
.mtp-mute.active {
  background: rgba(248, 113, 113, 0.22);
  color: #f87171;
  border-color: #f87171;
}
.mtp-solo.active {
  background: rgba(234, 179, 8, 0.22);
  color: #eab308;
  border-color: #eab308;
}

.mtp-vol-wrap {
  flex: 1;
  min-width: 60px;
  display: flex;
  align-items: center;
}
.mtp-vol {
  width: 100%;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  outline: none;
  cursor: pointer;
}
.mtp-vol::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--stem-color, #8B6FE8);
  border: 2px solid #09090f;
  cursor: pointer;
  transition: transform 0.1s;
}
.mtp-vol::-webkit-slider-thumb:hover { transform: scale(1.15); }
.mtp-vol::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--stem-color, #8B6FE8);
  border: 2px solid #09090f;
  cursor: pointer;
}

/* ── Waveform ─────────────────────────────────────────────── */
.mtp-track-wave {
  position: relative;
  height: 60px;
  background: rgba(0, 0, 0, 0.25);
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
}
.mtp-canvas {
  display: block;
  width: 100%;
  height: 100%;
}
.mtp-playhead {
  position: absolute;
  top: 0; bottom: 0;
  left: 0;
  width: 2px;
  background: #ffffff;
  pointer-events: none;
  z-index: 2;
  box-shadow: 0 0 8px rgba(255, 255, 255, 0.4);
}

/* ── Transport ────────────────────────────────────────────── */
.mtp-transport {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  background: #0f0e18;
}
.mtp-play {
  flex-shrink: 0;
  width: 48px; height: 48px;
  border-radius: 50%;
  border: none;
  background: #8B6FE8;
  color: #ffffff;
  font-size: 18px;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
  display: flex; align-items: center; justify-content: center;
}
.mtp-play:hover { background: #6b54c4; }
.mtp-play:active { transform: scale(0.95); }
.mtp-time {
  font-family: 'DM Mono', ui-monospace, monospace;
  font-size: 13px;
  color: #9d9ab5;
  min-width: 96px;
  white-space: nowrap;
  flex-shrink: 0;
}
.mtp-seek {
  flex: 1;
  min-width: 80px;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: rgba(255, 255, 255, 0.12);
  border-radius: 4px;
  outline: none;
  cursor: pointer;
}
.mtp-seek::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: #eeeaf8;
  border: 2px solid #0f0e18;
  cursor: pointer;
}
.mtp-seek::-moz-range-thumb {
  width: 14px; height: 14px;
  border-radius: 50%;
  background: #eeeaf8;
  border: 2px solid #0f0e18;
  cursor: pointer;
}

/* ──────────────────────────────────────────────────────────────
   Mobile (< 768px) — cards stackées par piste
   ────────────────────────────────────────────────────────────── */
@media (max-width: 767px) {
  .mtp-header {
    padding: 12px 14px;
  }
  .mtp-title { font-size: 15px; }
  .mtp-close { width: 32px; height: 32px; font-size: 14px; }

  .mtp-tracks {
    padding: 12px 14px;
  }

  .mtp-track {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 12px;
    background: #161524;
    border: 1px solid #25233a;
    border-left: 3px solid var(--stem-color, #888);
    border-radius: 12px;
    margin-bottom: 8px;
  }
  .mtp-track:last-child { border-bottom: 1px solid #25233a; border-left: 3px solid var(--stem-color, #888); }

  .mtp-track-ctrls {
    width: 100%;
  }
  .mtp-track-label {
    width: auto;
    flex: 1;
  }
  .mtp-track-wave {
    width: 100%;
    height: 50px;
  }

  .mtp-transport {
    padding: 12px 14px;
    gap: 10px;
  }
  .mtp-play { width: 44px; height: 44px; font-size: 16px; }
  .mtp-time { font-size: 12px; min-width: 86px; }
}

/* ──────────────────────────────────────────────────────────────
   Très petit écran (< 380px) — compactage extrême
   ────────────────────────────────────────────────────────────── */
@media (max-width: 379px) {
  .mtp-track-label { font-size: 12px; }
  .mtp-mute, .mtp-solo { width: 26px; height: 24px; font-size: 10px; }
  .mtp-time { min-width: 76px; font-size: 11px; }
}