.player-app {
  display: grid;
  gap: clamp(0.75rem, 2vw, 1.25rem);
  width: 100%;
}

.player-toolbar {
  position: sticky;
  top: 0;
  z-index: 50;

  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  align-items: center;

  gap: 0.25rem;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;

  padding: 0.35rem;
  border-radius: 0.9rem;
  background: #1f4f8f;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.16);

  overflow: visible;
}

.toolbar-group {
  display: inline-flex;
  flex-direction: row;
  flex-wrap: nowrap;
  gap: 0.2rem;
  align-items: center;
  flex: 0 0 auto;
  white-space: nowrap;
}

.player-btn {
  min-height: 34px;
  border: 0;
  border-radius: 999px;
  background: #ffffff;
  color: #1f4f8f;
  font-size: 0.78rem;
  font-weight: 800;
  cursor: pointer;
  line-height: 1;
  white-space: nowrap;
}

.player-btn-icon {
  width: 34px;
  min-width: 34px;
  padding: 0;
  font-size: 1rem;
}

.player-btn-wide {
  min-height: 34px;
  padding: 0 0.42rem;
  display: inline-flex;
  align-items: center;
}

.player-btn.active {
  background: #ffcc33;
  color: #172033;
}

.playlist-menu {
  position: relative;
  display: inline-block;
  overflow: visible;
}

.playlist-menu summary {
  list-style: none;
  user-select: none;
}

.playlist-menu summary::-webkit-details-marker {
  display: none;
}

.playlist-menu summary::after {
  content: " ▾";
  font-size: 0.8em;
}

.playlist-menu[open] summary::after {
  content: " ▴";
}

.playlist-menu-panel {
  display: none;
  position: absolute;
  z-index: 500;
  top: calc(100% + 0.4rem);
  left: 0;
  min-width: 180px;
  padding: 0.45rem;
  border-radius: 0.9rem;
  background: #ffffff;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.18);
}

.playlist-menu[open] .playlist-menu-panel {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.menu-action {
  display: block;
  width: 100%;
  min-height: 40px;
  margin: 0;
  padding: 0.55rem 0.75rem;
  border: 0;
  border-radius: 0.65rem;
  background: #eaf2ff;
  color: #1f4f8f;
  text-align: left;
  font-weight: 700;
  cursor: pointer;
}

.menu-action:hover:not(:disabled) {
  background: #dbeafe;
}

.menu-action:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  filter: grayscale(1);
}

.playlist-header {
  padding: 0.75rem 1rem;
  border-radius: 1rem;
  background: #eaf2ff;
}

.playlist-header h2 {
  margin: 0.15rem 0 0;
  font-size: clamp(1.35rem, 3vw, 2rem);
}

.eyebrow {
  display: block;
  font-size: clamp(0.75rem, 1.5vw, 0.9rem);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  opacity: 0.75;
}

.track-detail-panel {
  display: grid;
  grid-template-columns: minmax(220px, 320px) minmax(0, 1fr);
  gap: clamp(1rem, 3vw, 1.5rem);
  align-items: start;
  padding: clamp(0.75rem, 2vw, 1.25rem);
  border-radius: 1.25rem;
  background: #1f4f8f;
  color: #ffffff;
}

.cover-frame {
  width: min(100%, 320px);
  aspect-ratio: 4 / 3;
  border-radius: 1rem;
  overflow: hidden;
  background: #1f4f8f;
  display: grid;
  place-items: center;
}

.cover-frame img {
  width: 82%;
  height: 82%;
  object-fit: contain;
  display: block;
}

.track-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.track-title-row h3 {
  margin: 0;
  font-size: clamp(1.2rem, 3vw, 1.8rem);
}

.favorite-btn {
  width: 44px;
  height: 44px;
  border: 0;
  border-radius: 999px;
  background: #ffffff;
  color: #1f4f8f;
  font-size: 1.7rem;
  cursor: pointer;
}

.track-meta-list {
  display: grid;
  grid-template-columns: max-content minmax(0, 1fr);
  gap: 0.4rem 0.9rem;
  margin: 1rem 0 0;
  font-size: clamp(0.9rem, 1.7vw, 1rem);
}

.track-meta-list dt {
  font-weight: 700;
  opacity: 0.85;
}

.track-meta-list dd {
  margin: 0;
  min-width: 0;
  word-break: break-word;
}

.player-lists {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(0.75rem, 2vw, 1.25rem);
}

.player-list-panel {
  min-height: 240px;
  padding: clamp(0.75rem, 2vw, 1rem);
  border-radius: 1.25rem;
  background: #f3f6fb;
}

.list-header h3 {
  margin: 0;
  font-size: clamp(1rem, 2.2vw, 1.25rem);
}

.list-header p {
  margin: 0.25rem 0 0;
  font-size: clamp(0.8rem, 1.5vw, 0.95rem);
  opacity: 0.75;
}

.player-list {
  max-height: min(38vh, 420px);
  overflow-y: auto;
  margin: 0.75rem 0 0;
  padding: 0;
  list-style: none;
}

.player-list li {
  padding: 0.7rem 0.85rem;
  margin-bottom: 0.35rem;
  border-radius: 0.75rem;
  cursor: pointer;
  font-size: clamp(0.9rem, 1.8vw, 1rem);
  background: #ffffff;
}

.player-list li:hover {
  background: #eaf2ff;
}

#tracks li.active,
#library li.active {
  font-weight: 800;
  outline: 3px solid #1f4f8f;
  outline-offset: 2px;
  background: #dbeafe;
}

.audio-player {
  width: 100%;
  margin-top: 0.25rem;
}

@media (max-width: 420px) {
  .player-toolbar {
    gap: 0.25rem;
    padding: 0.35rem;
  }

  .toolbar-group {
    gap: 0.2rem;
  }

  .player-btn {
    min-height: 34px;
    font-size: 0.8rem;
  }

  .player-btn-icon {
    width: 34px;
    min-width: 34px;
    font-size: 1.05rem;
  }

  .player-btn-wide {
    min-height: 34px;
    padding: 0 0.45rem;
  }
}

@media (max-width: 760px) {
  .player-toolbar {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    overflow: visible;
  }

  .track-detail-panel {
    grid-template-columns: 1fr;
  }

  .player-lists {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 1200px) {
  .player-app {
    max-width: 1180px;
  }
}