.toc {
  width: 100%;
  padding: 24px;
  background: rgba(0, 0, 0, 0.5);
  border-radius: 12px;
  outline: 1px solid var(--color-text-secondary, #a7b0ba);
  outline-offset: -1px;
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.toc__heading {
  color: var(--color-brand-text-inverse, #f1fcff);
  font-family: var(--font-display);
  font-size: var(--fs-h5);
  line-height: 1.1;
  font-weight: var(--fw-regular);
}

.toc__nav {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.toc__link {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  text-decoration: none;
  color: var(--color-text-secondary, #a7b0ba);
  font-family: var(--font-secondary);
  font-size: var(--fs-body);
  font-weight: var(--fw-semibold);
  line-height: 1.7;
  transition: color var(--duration-normal) var(--ease-out);
}

.toc__link:hover {
  color: var(--color-brand-primary);
}

.toc__link.is-active {
  color: var(--color-brand-primary);
}

.toc__link-indicator {
  flex: 0 0 12px;
  width: 12px;
  height: 17px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-out);
}

.toc__link.is-active .toc__link-indicator {
  opacity: 1;
}

.toc__link-indicator::before {
  content: "";
  display: block;
  width: 3px;
  height: 6px;
  border-right: 1.25px solid var(--color-brand-primary);
  border-bottom: 1.25px solid var(--color-brand-primary);
  transform: rotate(45deg) translateY(-1px);
}

.toc__link-text {
  flex: 1;
  min-width: 0;
}

@media (max-width: 768px) {
  .toc {
    gap: 16px;
  }

  .toc__nav {
    gap: 12px;
  }
}