.post-layout {
  display: block;
}

article {
  margin: 2rem 0;
}

.toc {
  display: none;
}

@media (min-width: 72rem) {
  .post-layout {
    display: grid;
    grid-template-columns: 1fr 14rem;
    gap: 2rem;
  }

  .toc {
    display: block;
    position: sticky;
    top: 4rem;
    margin-top: 2rem;
    max-height: calc(100vh - 5rem);
    overflow-y: auto;
    font-size: 0.85rem;
    align-self: start;
  }

  .toc details {
    border-left: 2px solid var(--border);
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .toc summary {
    cursor: pointer;
    font-weight: bold;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
  }

  .toc ol {
    list-style: none;
    padding: 0 0 0 0.5rem;
    margin: 0;
  }

  .toc li {
    margin: 0.25rem 0;
    line-height: 1.4;
  }

  .toc .depth-1 { padding-left: 1rem; }
  .toc .depth-2 { padding-left: 2rem; }
  .toc .depth-3 { padding-left: 3rem; }
  .toc .depth-4 { padding-left: 4rem; }
  .toc .depth-5 { padding-left: 5rem; }

  .toc a {
    text-decoration: none;
    color: var(--text-secondary);
    opacity: 0.7;
    transition: opacity 0.15s, color 0.15s;
  }

  .toc a:hover {
    color: var(--link);
    opacity: 1;
  }
}

article h1 {
  margin-top: 0;
}

.post-meta {
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.post-date {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.tag {
  display: inline-block;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 0.25rem;
  padding: 0.1rem 0.5rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

table {
  border-collapse: collapse;
  width: 100%;
  margin: 1rem 0;
}

th, td {
  border: 1px solid var(--border);
  padding: 0.5rem;
  text-align: left;
}

th {
  background: var(--bg-secondary);
}

.callout {
  border-left: 4px solid var(--link);
  background: var(--bg-secondary);
  padding: 1rem;
  margin: 1rem 0;
  border-radius: 0 0.3rem 0.3rem 0;
}

.callout-title {
  font-weight: bold;
  margin-bottom: 0.5rem;
}