/* ─── UI Scale Slider ─── */
.ui-scale-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 2px;
  background: var(--border-subtle);
  outline: none;
  cursor: pointer;
}

.ui-scale-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  transition: transform 0.1s ease, box-shadow 0.1s ease;
}

.ui-scale-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 20%, transparent);
}

/* ── Folder Browser (Miller Columns) ──────────────────────────────────────── */

.folder-browser {
  display: flex;
  flex-direction: column;
  padding: 0;
  height: 100%;
}

.folder-browser-title {
  padding: 1.5rem 1.5rem 0.75rem;
  flex-shrink: 0;
}

.folder-browser-columns {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: row;
  overflow-x: auto;
  overflow-y: hidden;
  /* height fallback for browsers that don't support flex: 1 correctly here */
  height: calc(100vh - var(--player-height, 88px) - var(--titlebar-height, 0px) - 70px);
  border-top: 1px solid var(--border-subtle);
  scrollbar-width: thin;
  scrollbar-color: color-mix(in srgb, var(--accent) 35%, var(--text-muted)) transparent;
}

.folder-browser-columns:focus,
.folder-browser-columns:focus-visible {
  outline: none;
}

.folder-browser-columns::-webkit-scrollbar {
  height: 8px;
}

.folder-browser-columns::-webkit-scrollbar-track {
  background: transparent;
}

.folder-browser-columns::-webkit-scrollbar-thumb {
  background: color-mix(in srgb, var(--accent) 35%, var(--text-muted));
  border-radius: 999px;
  border: 2px solid transparent;
  background-clip: content-box;
}

.folder-col {
  flex: 1 1 220px;
  min-width: 200px;
  height: 100%;
  overflow-y: auto;
  overflow-x: hidden;
  border-right: 1px solid var(--border-subtle);
  scrollbar-width: thin;
  scrollbar-color: color-mix(in srgb, var(--accent) 35%, var(--text-muted)) transparent;
  transition: min-width 0.18s ease, max-width 0.18s ease, flex-basis 0.18s ease, flex-grow 0.18s ease;
}

.folder-browser-columns--compact .folder-col {
  flex: 0 0 var(--folder-col-width, 220px);
  min-width: var(--folder-col-width, 220px);
  max-width: var(--folder-col-width, 220px);
}

.folder-col.folder-col--compact {
  flex-basis: 56px;
  min-width: 56px;
  max-width: 56px;
}

.folder-col.folder-col--compact .folder-col-row {
  justify-content: center;
  gap: 0;
  padding-left: 0.2rem;
  padding-right: 0.2rem;
}

.folder-col.folder-col--compact .folder-col-name,
.folder-col.folder-col--compact .folder-col-chevron {
  display: none;
}

.folder-col.folder-col--compact .folder-col-icon {
  opacity: 0.95;
}

.folder-col::-webkit-scrollbar {
  width: 8px;
}

.folder-col::-webkit-scrollbar-track {
  background: transparent;
}

.folder-col::-webkit-scrollbar-thumb {
  background: color-mix(in srgb, var(--accent) 35%, var(--text-muted));
  border-radius: 999px;
  border: 2px solid transparent;
  background-clip: content-box;
}

.folder-col::-webkit-scrollbar-thumb:hover {
  background: color-mix(in srgb, var(--accent) 55%, var(--text-primary));
}

.folder-col-status {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 80px;
  color: var(--text-muted);
  font-size: 0.8rem;
  padding: 1rem;
  text-align: center;
}

.folder-col-filter {
  position: sticky;
  top: 0;
  z-index: 2;
  padding: 0.35rem 0.45rem;
  background: color-mix(in srgb, var(--bg-app) 92%, transparent);
  border-bottom: 1px solid var(--border-subtle);
}

.folder-col-filter-input {
  width: 100%;
  padding: 0.35rem 0.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 0.78rem;
}

.folder-col-filter-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.folder-col.folder-col--compact .folder-col-filter {
  display: none;
}

.folder-col-error {
  color: var(--danger, #f38ba8);
}

.folder-col-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.38rem 0.6rem 0.38rem 0.75rem;
  background: none;
  border: none;
  border-radius: 0;
  cursor: pointer;
  color: var(--text-primary);
  font-size: 0.8rem;
  text-align: left;
  transition: background 0.1s;
}

.folder-col-row:hover {
  background: var(--bg-hover, color-mix(in srgb, var(--accent) 8%, transparent));
}

.folder-browser-columns.keyboard-nav-active .folder-col-row:hover:not(.selected):not(.context-active):not(.keyboard-active) {
  background: none;
}

/* Context-menu anchor only — does not replace Miller “open” selection (accent). */
.folder-col-row.context-active:not(.selected) {
  background: var(--bg-hover, color-mix(in srgb, var(--accent) 8%, transparent));
}

.folder-col-row.keyboard-active:not(.selected) {
  background: var(--bg-hover, color-mix(in srgb, var(--accent) 8%, transparent));
}

.folder-col-row.selected {
  background: var(--accent);
  color: oklch(from var(--accent) clamp(0, (0.58 - l) * 100, 1) 0 h);
}

.folder-col-row.selected .folder-col-chevron {
  color: oklch(from var(--accent) clamp(0, (0.58 - l) * 100, 1) 0 h / 0.7);
}

.folder-col-icon {
  flex-shrink: 0;
  opacity: 0.75;
  display: flex;
  align-items: center;
}

.folder-col-row.selected .folder-col-icon {
  opacity: 1;
}

.folder-col-row.now-playing .folder-col-name {
  font-weight: 600;
}

.folder-col-playing-icon {
  animation: folderTrackPulse 1.2s ease-in-out infinite;
  transform-origin: center;
}

.folder-col-path-playing-icon {
  animation: folderTrackPulse 1.2s ease-in-out infinite;
  transform-origin: center;
}

.folder-col-path-playing-icon svg {
  stroke-width: 2.6;
  filter: saturate(1.08) contrast(1.06);
}

@keyframes folderTrackPulse {
  0% { transform: scale(1); opacity: 0.92; }
  50% { transform: scale(1.16); opacity: 1; }
  100% { transform: scale(1); opacity: 0.92; }
}

.folder-col-name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.folder-col-chevron {
  flex-shrink: 0;
  color: var(--text-muted);
  margin-left: auto;
}