/* ============================================================
   Collection page (Collection.html)
   Two-pane layout: music list (left) + video player (right).
   ============================================================ */

.collection {
  display: flex;
  gap: 24px;
  max-width: 1400px;
  margin: 0 auto;
  padding: 40px 20px;
  min-height: 70vh;
}

/* ── Left: track list ──────────────────────────────────────── */
.track-list {
  flex: 0 0 320px;
  background: rgba(255, 255, 255, 0.92);
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  padding: 20px;
  max-height: 80vh;
  overflow-y: auto;
}

.track-list h2 {
  font-family: var(--font-display);
  font-size: 22px;
  color: var(--heading);
  margin: 0 0 20px;
}

.track {
  position: relative;
  padding: 10px 16px 10px 32px;
  margin-bottom: 6px;
  background: #f8f8f8;
  border-left: 3px solid transparent;
  border-radius: 5px;
  font-size: 16px;
  color: var(--heading);
  cursor: pointer;
  transition: background 0.25s, border-color 0.25s, transform 0.25s;
}

.track::before {
  content: '•';
  position: absolute;
  left: 13px;
  color: var(--muted);
  font-size: 20px;
}

.track:hover {
  background: #ededed;
  border-left-color: var(--accent);
  transform: translateX(4px);
}

.track.active {
  background: #f0e7e1;
  border-left-color: var(--accent);
  font-weight: 700;
}

/* ── Right: player ─────────────────────────────────────────── */
.player {
  flex: 1 1 auto;
  min-width: 0;
}

.player h2 {
  font-family: var(--font-display);
  font-size: 24px;
  color: var(--heading);
  margin: 0 0 15px;
}

.video-frame {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;   /* 16:9 */
  background: #000;
  border-radius: 6px;
  overflow: hidden;
}

.video-frame iframe,
.video-frame video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.video-frame video { object-fit: contain; background: #000; }

/* ── Mobile ────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .collection {
    flex-direction: column;
    padding: 24px 15px;
  }

  .track-list {
    flex: 1 1 auto;
    max-height: 280px;
  }
}