.html-post {
  --post-accent: #236a72;
  --post-border: #d9e3e3;
  --post-surface: #f5f9f9;
}

.html-post > :first-child {
  margin-top: 0;
}

.html-post .post-lead {
  font-size: 1.12em;
  line-height: 1.7;
}

.html-post .post-panel {
  margin: 1.5rem 0;
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--post-border);
  border-left: 4px solid var(--post-accent);
  border-radius: 0.45rem;
  background: var(--post-surface);
}

.html-post .post-panel > :first-child {
  margin-top: 0;
}

.html-post .post-panel > :last-child {
  margin-bottom: 0;
}

.html-post .post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.html-post .post-grid > * {
  min-width: 0;
  margin: 0;
}

.html-post .post-toc {
  margin: 1.5rem 0;
  padding: 0.9rem 1.2rem;
  border: 1px solid var(--post-border);
  border-radius: 0.45rem;
  background: var(--post-surface);
  font-size: 0.92em;
}

.html-post .post-toc__title {
  margin: 0 0 0.4rem;
  font-weight: 700;
}

.html-post .post-toc ol {
  margin: 0;
  padding-left: 1.3rem;
}

.html-post .post-toc > ol {
  columns: 2 14rem;
  column-gap: 2rem;
}

.html-post .post-toc li {
  margin: 0 0 0.3rem;
  list-style: decimal;
  break-inside: avoid;
}

.html-post details {
  margin: 1.5rem 0;
  padding: 0.8rem 1rem;
  border: 1px solid var(--post-border);
  border-radius: 0.45rem;
}

.html-post summary {
  cursor: pointer;
  font-weight: 700;
}

.html-post :focus-visible {
  outline: 3px solid var(--post-accent);
  outline-offset: 3px;
}