/* ═══════════════════════════════════════════════════════
   Components — Buttons, Inputs, Sliders, Playlist Items
   ═══════════════════════════════════════════════════════ */

/* ── Buttons ── */
.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  border: none;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.btn-icon:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.btn-control {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: none;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-control:hover {
  color: var(--text-primary);
  transform: scale(1.05);
}

.btn-control:active {
  transform: scale(0.95);
}

.btn-control-lg {
  width: 48px;
  height: 48px;
}

.btn-play {
  width: 56px;
  height: 56px;
  background: var(--text-primary);
  color: var(--bg-primary);
}

.btn-play:hover {
  background: var(--text-primary);
  transform: scale(1.06);
}

.btn-play:active {
  transform: scale(0.96);
}

/* iOS Controls */
.btn-ios-control {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  border: none;
  background: transparent;
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
}

.btn-ios-control:active {
  transform: scale(0.9);
  opacity: 0.7;
}

.btn-ios-play-main {
  width: 80px;
  height: 80px;
  background: var(--text-primary);
  color: var(--bg-primary);
}

.btn-ios-play-main:active {
  background: var(--text-primary);
  opacity: 0.85;
}

.btn-close-modal {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  border: none;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: var(--text-lg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-close-modal:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

/* ── Search Box ── */
.search-box {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 0 var(--space-4);
  height: 40px;
  transition: border-color var(--transition-fast);
}

.search-box:focus-within {
  border-color: var(--text-muted);
}

.search-icon {
  color: var(--text-muted);
  flex-shrink: 0;
}

.search-input {
  flex: 1;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: var(--text-sm);
  font-family: var(--font-sans);
  outline: none;
}

.search-input::placeholder {
  color: var(--text-muted);
}

.search-shortcut {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 2px 8px;
  background: var(--bg-hover);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  flex-shrink: 0;
}

/* ── Playlist Item (Desktop) ── */
.playlist-item {
  display: grid;
  grid-template-columns: 40px 1fr 180px 60px 40px;
  gap: var(--space-3);
  align-items: center;
  padding: 8px var(--space-6);
  cursor: pointer;
  transition: background var(--transition-fast);
  position: relative;
}

.playlist-item:hover {
  background: var(--bg-hover);
}

.playlist-item:active {
  background: var(--bg-active);
}

.playlist-item.active {
  background: var(--accent-dim);
}

.playlist-item.active .item-index {
  color: var(--accent);
}

.item-index {
  font-size: var(--text-sm);
  color: var(--text-muted);
  text-align: center;
  font-variant-numeric: tabular-nums;
}

.item-index .item-play-icon {
  display: none;
  color: var(--accent);
}

.playlist-item.active .item-index .item-index-num {
  display: none;
}

.playlist-item.active .item-index .item-play-icon {
  display: inline;
}

.playlist-item:hover .item-index .item-index-num {
  display: none;
}

.playlist-item:hover .item-index .item-play-icon {
  display: inline;
  color: var(--text-primary);
}

.item-info {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.item-title {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.playlist-item.active .item-title {
  color: var(--accent);
}

.item-artist {
  font-size: var(--text-xs);
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.item-album {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.item-duration {
  font-size: var(--text-sm);
  color: var(--text-muted);
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.item-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2px;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.playlist-item:hover .item-actions {
  opacity: 1;
}

.item-action-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: none;
  background: none;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.item-action-btn:hover {
  color: var(--text-primary);
  background: var(--bg-active);
}

.item-action-btn.favorited {
  color: var(--accent);
}

.item-action-btn.favorited svg {
  fill: var(--accent);
}

/* ── Progress Bar (Desktop) ── */
.progress-bar {
  flex: 1;
  height: 4px;
  background: var(--bg-hover);
  border-radius: var(--radius-full);
  cursor: pointer;
  position: relative;
}

.progress-fill {
  height: 100%;
  background: var(--text-primary);
  border-radius: var(--radius-full);
  width: 0%;
  position: relative;
  transition: background var(--transition-fast);
}

.progress-bar:hover .progress-fill {
  background: var(--accent);
}

.progress-handle {
  position: absolute;
  top: 50%;
  right: -6px;
  width: 12px;
  height: 12px;
  background: var(--text-primary);
  border-radius: 50%;
  transform: translateY(-50%);
  opacity: 0;
  transition: opacity var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.progress-bar:hover .progress-handle {
  opacity: 1;
}

/* ── Volume Slider ── */
.volume-control {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.volume-slider-container {
  width: 0;
  overflow: hidden;
  transition: width var(--transition-base);
}

.volume-control:hover .volume-slider-container {
  width: 80px;
}

.volume-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 80px;
  height: 4px;
  background: var(--bg-hover);
  border-radius: var(--radius-full);
  outline: none;
  cursor: pointer;
}

.volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 12px;
  height: 12px;
  background: var(--text-primary);
  border-radius: 50%;
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.volume-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.volume-slider::-moz-range-thumb {
  width: 12px;
  height: 12px;
  background: var(--text-primary);
  border-radius: 50%;
  border: none;
  cursor: pointer;
}

/* ── Queue List ── */
.queue-list .playlist-item {
  grid-template-columns: 32px 1fr 50px;
}

.queue-list .item-album,
.queue-list .col-album {
  display: none;
}

/* ── Loading Spinner ── */
.loading-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ── Toast ── */
.toast-container {
  position: fixed;
  bottom: calc(var(--player-bar-height) + var(--space-4));
  left: 50%;
  transform: translateX(-50%);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  pointer-events: none;
}

.toast {
  padding: var(--space-3) var(--space-5);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
  font-size: var(--text-sm);
  color: var(--text-primary);
  animation: toast-in 0.3s ease, toast-out 0.3s ease 2.5s forwards;
  white-space: nowrap;
}

@keyframes toast-in {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes toast-out {
  from { opacity: 1; }
  to { opacity: 0; }
}