.richText .toc {
  position: relative;
  margin: 48px 0;
  padding: 30px 32px 28px;
  border: 1px solid var(--aidia-color-border);
  border-radius: 18px;
  background:
    linear-gradient(135deg, var(--aidia-color-brand-wash), transparent 44%),
    var(--aidia-color-surface);
  box-shadow: 0 16px 42px var(--aidia-color-shadow-warm);
  overflow: hidden;
}

.richText .toc::before {
  position: absolute;
  inset: 0 auto 0 0;
  width: 5px;
  background: linear-gradient(180deg, var(--aidia-color-brand), var(--aidia-color-brand-strong));
  content: "";
}

.richText .toc_title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 18px;
  color: var(--aidia-color-ink);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: .04em;
}

.richText .toc_title span {
  color: var(--aidia-color-brand-strong);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .18em;
}

.richText .toc_list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  background: transparent;
  counter-reset: toc-section;
  list-style: none;
}

.richText .toc_item {
  position: relative;
  margin: 0;
  border-top: 1px solid var(--aidia-color-outline-subtle);
}

.richText .toc_item:first-child {
  border-top: 0;
}

.richText .toc_item--2 {
  counter-increment: toc-section;
}

.richText .toc_item a {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  min-height: 48px;
  padding: 12px 8px;
  border-radius: 10px;
  color: var(--aidia-color-text);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.6;
  text-decoration: none;
  transition: color .2s ease, background-color .2s ease, transform .2s ease;
}

.richText .toc_item a::before {
  color: var(--aidia-color-brand-strong);
  font-variant-numeric: tabular-nums;
  font-weight: 800;
  text-align: center;
  content: counter(toc-section, decimal-leading-zero);
}

.richText .toc_item--3 {
  margin-left: 34px;
  border-top-style: dashed;
}

.richText .toc_item--3 a {
  grid-template-columns: 16px minmax(0, 1fr);
  min-height: 44px;
  color: var(--aidia-color-text-soft);
  font-size: 14px;
  font-weight: 600;
}

.richText .toc_item--3 a::before {
  color: var(--aidia-color-brand);
  content: "↳";
}

.richText .toc_item a:hover {
  background: var(--aidia-color-brand-wash);
  color: var(--aidia-color-brand-strong);
  transform: translateX(3px);
}

.richText .toc_item a:focus-visible {
  outline: 3px solid var(--aidia-color-brand-focus);
  outline-offset: 2px;
}

@media (max-width: 720px) {
  .richText .toc {
    margin: 36px 0;
    padding: 24px 18px 20px 22px;
    border-radius: 14px;
  }

  .richText .toc_title {
    margin-bottom: 12px;
    font-size: 20px;
  }

  .richText .toc_item a {
    grid-template-columns: 30px minmax(0, 1fr);
    gap: 8px;
    min-height: 48px;
    padding: 12px 4px;
    font-size: 14px;
  }

  .richText .toc_item--3 {
    margin-left: 26px;
  }

  .richText .toc_item--3 a {
    grid-template-columns: 14px minmax(0, 1fr);
    font-size: 13px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .richText .toc_item a {
    transition: none;
  }
}