.icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  transition: background-color var(--duration-fast) var(--ease), color var(--duration-fast) var(--ease);
}
.icon-button svg { width: 18px; height: 18px; }
.icon-button:hover { background-color: var(--color-surface-2); color: var(--color-text); }
.icon-button[aria-pressed='true'], .icon-button.is-active { color: var(--color-accent); }
.icon-button.is-disabled { opacity: 0.35; pointer-events: none; }
.icon-button[hidden] { display: none; }

.tabs {
  display: flex;
  gap: var(--space-6);
  border-bottom: 1px solid var(--color-border);
  overflow-x: auto;
  scrollbar-width: none;
}
.tabs::-webkit-scrollbar { display: none; }
.tabs__tab {
  position: relative;
  padding: var(--space-3) var(--space-1);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-muted);
  white-space: nowrap;
  transition: color var(--duration-fast) var(--ease);
}
.tabs__tab::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 2px;
  background-color: var(--color-accent);
  opacity: 0;
  transition: opacity var(--duration-fast) var(--ease);
}
.tabs__tab:hover { color: var(--color-text); }
.tabs__tab[aria-selected='true'] { color: var(--color-text); }
.tabs__tab[aria-selected='true']::after { opacity: 1; }

.tag-list { display: flex; flex-wrap: wrap; gap: 4px; }
.tag {
  font-size: 0.6875rem;
  font-weight: var(--weight-medium);
  color: var(--color-text-muted);
  background-color: var(--color-surface-2);
  border-radius: var(--radius-sm);
  padding: 1px 7px;
  line-height: 1.6;
}

.track-row {
  display: grid;
  grid-template-columns: 40px 1fr auto;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  transition: border-color var(--duration-fast) var(--ease), background-color var(--duration-fast) var(--ease);
}
.track-row[hidden] { display: none; }
.track-row:hover { border-color: var(--color-border-strong); background: var(--color-surface-2); }
.track-row.is-playing { border-color: var(--color-accent); background: var(--color-accent-soft); }
.track-row.is-playing .track-row__title { color: var(--color-accent); }
.track-row__artwork {
  width: 40px; height: 40px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  background-color: var(--color-surface-2);
}
.track-row__info { min-width: 0; display: flex; flex-direction: column; gap: 5px; }
.track-row__title {
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  color: var(--color-text);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.track-row__actions { display: flex; align-items: center; gap: var(--space-3); }
.track-row__duration {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-variant-numeric: tabular-nums;
}
.track-row__play {
  width: 36px; height: 36px;
  border: 1px solid var(--color-border-strong);
  color: var(--color-text);
}
.track-row__play svg { width: 15px; height: 15px; }
.track-row__play:hover {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-accent-contrast);
}
.track-row.is-playing .track-row__play {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-accent-contrast);
}

.card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--duration-base) var(--ease), border-color var(--duration-base) var(--ease);
}
.card:hover { box-shadow: var(--shadow-md); border-color: var(--color-border-strong); }
.card__artwork-wrap { aspect-ratio: 4 / 3; background-color: var(--color-surface-2); overflow: hidden; }
.card__artwork { width: 100%; height: 100%; object-fit: cover; }
.card__body { padding: var(--space-4); display: flex; flex-direction: column; gap: var(--space-2); flex: 1; }
.card__title {
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: var(--leading-tight);
}
.card__meta { font-size: var(--text-sm); color: var(--color-text-muted); }
.card__description {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card__description:empty { display: none; }
.card__actions { display: flex; align-items: center; gap: var(--space-2); margin-top: auto; padding-top: var(--space-2); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  transition: background-color var(--duration-fast) var(--ease), color var(--duration-fast) var(--ease), border-color var(--duration-fast) var(--ease), opacity var(--duration-fast) var(--ease);
}
.btn svg { width: 14px; height: 14px; flex-shrink: 0; }
.btn--primary { background-color: var(--color-accent); color: var(--color-accent-contrast); }
.btn--primary:hover { opacity: 0.9; }
.btn--ghost { background-color: transparent; border: 1px solid var(--color-border-strong); color: var(--color-text); }
.btn--ghost:hover { border-color: var(--color-accent); color: var(--color-accent); }

.accordion-panel { display: grid; grid-template-rows: 0fr; transition: grid-template-rows var(--duration-slow) var(--ease); }
.accordion-panel.is-open { grid-template-rows: 1fr; }
.accordion-panel__inner { overflow: hidden; }
.accordion-panel__content {
  padding: var(--space-3) var(--space-4) var(--space-4);
  border-top: 1px solid var(--color-border);
  display: flex; flex-direction: column; gap: var(--space-2);
  margin-top: var(--space-3);
}

.cta-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  transition: border-color var(--duration-fast) var(--ease), background-color var(--duration-fast) var(--ease);
}
.cta-card:hover { border-color: var(--color-accent); background-color: var(--color-surface-2); }
.cta-card__label { font-size: var(--text-sm); font-weight: var(--weight-semibold); }
.cta-card__arrow { color: var(--color-accent); font-size: var(--text-base); transition: transform var(--duration-fast) var(--ease); }
.cta-card:hover .cta-card__arrow { transform: translateX(3px); }

.player {
  position: fixed; left: 0; right: 0; bottom: 0;
  z-index: var(--z-player);
  height: var(--player-height);
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  transition: transform var(--duration-base) var(--ease);
}
.player[hidden] { display: none; }
.player__inner {
  max-width: var(--content-max-width); height: 100%;
  margin-inline: auto; padding-inline: var(--content-padding-inline);
  display: grid;
  grid-template-columns: minmax(0, 220px) auto 1fr auto auto auto;
  align-items: center; gap: var(--space-5);
}
.player__track { display: flex; align-items: center; gap: var(--space-3); min-width: 0; }
.player__artwork { width: 44px; height: 44px; border-radius: var(--radius-sm); object-fit: cover; background-color: var(--color-surface-2); flex-shrink: 0; }
.player__meta { min-width: 0; display: flex; flex-direction: column; gap: 2px; }
.player__title { font-size: var(--text-sm); font-weight: var(--weight-medium); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.player__subtitle { font-size: var(--text-xs); color: var(--color-text-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.player__controls { display: flex; align-items: center; gap: var(--space-1); }
.player__play { width: 40px; height: 40px; background-color: var(--color-accent); color: var(--color-accent-contrast); border-radius: var(--radius-full); display: flex; align-items: center; justify-content: center; }
.player__play:hover { opacity: 0.9; background-color: var(--color-accent); color: var(--color-accent-contrast); }
.player__play.is-loading { cursor: wait; }
.player__spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-top-color: var(--color-accent-contrast);
  border-radius: 50%;
  animation: player-spin 0.7s linear infinite;
}
@keyframes player-spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
  .player__spinner { animation-duration: 1.6s; }
}
.player__progress { display: flex; align-items: center; gap: var(--space-2); min-width: 0; }
.player__time { font-size: var(--text-xs); color: var(--color-text-faint); font-variant-numeric: tabular-nums; flex-shrink: 0; }
.player__seek, .player__volume-slider {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 4px; border-radius: var(--radius-full);
  background: var(--color-border-strong); cursor: pointer;
}
.player__volume-slider { width: 80px; }
.player__seek::-webkit-slider-thumb, .player__volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none; width: 12px; height: 12px; border-radius: 50%;
  background: var(--color-accent); transition: transform var(--duration-fast) var(--ease);
}
.player__seek::-webkit-slider-thumb:hover, .player__volume-slider::-webkit-slider-thumb:hover { transform: scale(1.15); }
.player__seek::-moz-range-thumb, .player__volume-slider::-moz-range-thumb { width: 12px; height: 12px; border: none; border-radius: 50%; background: var(--color-accent); }
.player__volume { display: flex; align-items: center; gap: var(--space-2); }
.player__collapse { display: none; }
.player.is-collapsed .player__progress, .player.is-collapsed .player__volume { display: none; }
.player.is-collapsed .player__collapse svg { transform: rotate(180deg); transition: transform var(--duration-fast) var(--ease); }

@media (max-width: 900px) {
  .player__inner { grid-template-columns: 1fr auto auto auto; }
  .player__progress, .player__volume { display: none; }
}
@media (max-width: 480px) {
  .player { height: 64px; }
  .player__meta { max-width: 140px; }
}