/* the panel is a plain popover anchored to .toc-open-sticky (positioned via
   that ancestor, since position:sticky establishes a containing block for
   absolutely-positioned descendants same as position:relative) -- no
   backdrop, so the rest of the page stays fully visible and interactable;
   table_of_content.js closes it on an outside click / Escape / choosing a
   link instead. background-color/border come from ../shared/popover_base.css,
   shared across every anchored-popover component. */
.toc-overlay-panel {
  position: absolute;
  top: 0;
  left: calc(100% + 0.75rem);
  z-index: 50;
  width: min(85vw, 20rem);
  max-width: calc(100vw - 5rem);
  max-height: 80vh;
  overflow-y: auto;
  box-sizing: border-box;
  padding: 1.25rem;
  border-left: 6px solid var(--accent-color, var(--color-border));
  border-radius: 12px;
  box-shadow: 0 4px 16px var(--color-shadow);
}

.toc-overlay-panel[hidden] {
  display: none;
}

/* display/align-items/justify-content/gap come from ../shared/popover_base.css */
.toc-overlay-header {
  margin: 0 0 0.75rem;
}

/* margin/font-weight come from ../shared/popover_base.css */
.toc-overlay-title {
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

/* flex/cursor come from ../shared/popover_base.css */
.toc-overlay-close {
  padding: 0.1rem 0.5rem;
  background: none;
  border: 1px solid var(--color-text-muted);
  border-radius: 8px;
  font-family: inherit;
  font-size: 1.1rem;
  line-height: 1.4;
  color: var(--color-text-muted);
  transition: border-color 0.15s ease, color 0.15s ease;
}

.toc-overlay-close:hover {
  color: var(--color-text);
  border-color: var(--color-text);
}

.toc-overlay-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.toc-overlay-list li {
  margin: 0.3rem 0;
}

.toc-overlay-list li.toc-h3 {
  margin-left: 1.25rem;
}

.toc-overlay-list li.toc-h4 {
  margin-left: 2.5rem;
}

.toc-overlay-list li.toc-h5 {
  margin-left: 3.75rem;
}

.toc-overlay-list a {
  color: var(--color-text);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s ease, color 0.15s ease;
}

.toc-overlay-list a::before {
  content: "→";
  display: inline-block;
  margin-right: 0.4rem;
  color: var(--accent-color, var(--color-accent));
}

.toc-overlay-list a:hover {
  color: var(--color-text-muted);
  border-bottom-color: var(--accent-color, var(--color-text-muted));
}