/* ============================================================
   Blog Sidebar — Table of Contents
   Scoped to #blog-toc
   ============================================================ */

#blog-toc {
  position: sticky;
  top: 90px;
  z-index: 5;
  background: var(--im-bg-100);
  max-height: calc(100vh - 140px);
  overflow-y: auto;
}

#blog-toc .toc-card {
  border: 1px solid var(--im-bg-300);
  border-top: 3px solid var(--im-accent-200);
  border-radius: 0.5rem;
  background: var(--im-bg-200);
  padding: 1.25rem;
  margin-bottom: 1rem;
}

#blog-toc .toc-heading {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--im-accent-200);
  margin-bottom: 0.75rem;
}

#blog-toc nav {
  border-left: 2px solid var(--im-bg-300);
}

#blog-toc .toc-link {
  display: block;
  padding: 0.25rem 0.75rem;
  font-size: 0.9rem;
  line-height: 1.45;
  color: var(--im-text-200);
  text-decoration: none;
  border-left: 2px solid transparent;
  margin-left: -2px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

#blog-toc .toc-link:hover {
  color: var(--im-accent-200);
}

#blog-toc .toc-link:focus-visible {
  outline: 2px solid var(--im-accent-200);
  outline-offset: 2px;
  border-radius: 2px;
}

#blog-toc .toc-link.is-active {
  color: var(--im-accent-200);
  border-left-color: var(--im-accent-200);
  font-weight: 600;
}

/* H3 links are indented */
#blog-toc .toc-link--h3 {
  padding-left: 1.375rem;
  font-size: 0.8125rem;
  color: var(--im-text-200);
  opacity: 0.85;
}

#blog-toc .toc-link--h3.is-active {
  opacity: 1;
}

/* Empty state */
#blog-toc.toc-empty {
  display: none;
}

/* ---- Reduced motion ---- */
@media (prefers-reduced-motion: reduce) {
  #blog-toc .toc-link {
    transition: none;
  }
}