/*
 * Revealation — sidebar styles
 * ============================
 *
 * Styles for the core slide/subslide navigator, its Thumbnail/Outline modes,
 * lazy thumbnail surfaces and drag/drop hierarchy cues.
 */

.sidebar-view-toggle {
  display: inline-flex;
  gap: 2px;
  margin-left: auto;
  padding: 2px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
}
.sidebar-view-toggle button {
  display: inline-grid;
  place-items: center;
  width: 28px;
  height: 26px;
  padding: 0;
  border: 0;
  border-radius: 4px;
  background: transparent;
  color: var(--muted);
}
.sidebar-view-toggle button.active {
  background: var(--button-hover);
  color: var(--text);
}

.sidebar-thumbnails .slide-list {
  padding: 8px;
}
.sidebar-thumbnails .slide-list li {
  position: relative;
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr) auto;
  align-items: start;
  gap: 6px;
  padding: 7px;
}
.sidebar-thumbnails .slide-list li.subslide,
/* RV-COMPAT(subslide-vertical): REMOVE .vertical hook BEFORE PUBLIC RELEASE. */
.sidebar-thumbnails .slide-list li.vertical {
  margin-left: 18px;
}
.sidebar-thumbnails .slide-list li > .label {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  overflow: hidden !important;
  clip: rect(0 0 0 0) !important;
  white-space: nowrap !important;
}
.sidebar-thumbnails .slide-list .num {
  align-self: start;
  padding-top: 3px;
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
}
.thumbnail-shell {
  min-width: 0;
  width: 100%;
  grid-column: 2;
  border: 1px solid color-mix(in srgb, var(--border) 90%, transparent);
  border-radius: 5px;
  overflow: hidden;
  background: var(--rv-bg, var(--r-background-color, #191919));
  box-shadow: 0 1px 2px rgba(0,0,0,.08);
}
.slide-list li.active .thumbnail-shell {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}
.sidebar-thumbnails .slide-list li.active {
  border-color: transparent;
  box-shadow: none;
  background: transparent;
}
.thumbnail-viewport {
  position: relative;
  width: 100%;
  overflow: hidden;
  background: var(--r-background-color, #191919);
}
.thumbnail-surface.slide-editor {
  position: absolute;
  inset: 0 auto auto 0;
  box-sizing: border-box;
  transform-origin: 0 0;
  overflow: hidden;
  padding: 0;
  pointer-events: none;
  text-align: left;
  background: var(--rv-bg, var(--r-background-color, #191919));
  color: var(--rv-text, var(--r-main-color, #fff));
  font-family: var(--rv-font-body, var(--r-main-font, system-ui, sans-serif));
  line-height: var(--r-main-line-height, 1.3);
  font-size: var(--rv-size-body, var(--r-main-font-size, 22px));
}
/* RV-COMPAT(columns-directive): REMOVE old `.sr-col` thumbnail style BEFORE PUBLIC RELEASE. */
.thumbnail-surface .sr-col {
  outline: 0 !important;
}
/* Thumbnails show presentation output, never editor affordances. */
.thumbnail-surface.slide-editor .sr-layout,
.thumbnail-surface.slide-editor .sr-layout-slot,
.thumbnail-surface.slide-editor .sr-layout-content > * {
  outline: 0 !important;
}
.thumbnail-surface.slide-editor .sr-layout::before,
.thumbnail-surface.slide-editor .sr-layout-slot::before {
  display: none !important;
}
.thumbnail-surface.slide-editor .sr-layout-content {
  min-height: 0 !important;
}
.thumbnail-surface .fragment::after,
.thumbnail-surface pre.sr-code::after,
.thumbnail-surface .sr-math::after,
.thumbnail-surface a.linked-image::after {
  display: none !important;
}
.thumbnail-placeholder {
  min-height: 120px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: 2px dashed rgba(127,127,127,.45);
  border-radius: 8px;
  color: rgba(127,127,127,.9);
  font: 600 26px/1.2 system-ui, sans-serif;
}
.thumbnail-placeholder i { font-size: 42px; }

.sidebar-outline .slide-list .thumbnail-shell { display: none; }

@media (max-width: 760px) {
  .sidebar-view-toggle { margin-left: 0; }
  .sidebar-thumbnails .slide-list li { grid-template-columns: 30px minmax(0,1fr) auto; }
}