/* mobile "contents" dialog -- unlike .toc-overlay-panel below, this one
   does use a backdrop + centered layout (same pattern as .tool-lightbox in
   tool_page.css), since a small screen doesn't have room to anchor a
   popover next to anything sensible. position:fixed/inset:0 come from
   ../shared/modal_base.css, shared across every full-screen modal. */
.toc-modal {
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

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

/* background comes from ../shared/modal_base.css */
.toc-modal-backdrop {
  position: absolute;
  inset: 0;
}

.toc-modal-panel {
  position: relative;
  z-index: 1;
  width: min(90vw, 22rem);
  max-height: 80vh;
  overflow-y: auto;
  box-sizing: border-box;
  padding: 1.5rem;
  background-color: var(--color-bg);
  border: 2px solid var(--color-bg);
  border-radius: 12px;
  box-shadow: 0 8px 32px var(--color-shadow-strong);
}

.toc-modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 999px;
  border: 2px solid var(--color-on-accent);
  background: var(--color-text);
  color: var(--color-on-accent);
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
}

.toc-modal-close:hover {
  background: var(--color-cta);
}

.toc-modal-title {
  margin: 0 2.5rem 0.75rem 0;
  font-size: 0.9rem;
  font-weight: bold;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

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

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

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

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

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

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

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