.readingGrid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 22px;
  align-items: start;
}

@media (max-width: 920px) {
  .readingGrid {
    grid-template-columns: 1fr;
  }
}

.sidebar {
  position: sticky;
  top: 14px;
  max-height: calc(100vh - 28px);
  overflow: auto;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background: var(--card);
  padding: 12px;
}

.sidebar h3 {
  margin: 8px 0 10px;
  font-size: 0.95rem;
  color: var(--muted);
  letter-spacing: 0.01em;
}

.tocPart {
  margin: 10px 0;
  padding: 8px;
  border: 1px solid var(--hairline);
  border-radius: 10px;
}

.tocPartTitle {
  font-size: 0.9rem;
  color: var(--muted);
  margin: 0 0 6px;
}

.tocList {
  list-style: none;
  padding: 0;
  margin: 0;
}

.tocItem a {
  display: block;
  padding: 6px 8px;
  border-radius: 8px;
  text-decoration: none;
}
.tocItem a:hover { background: rgba(127,127,127,0.08); }

.tocItem[data-active="true"] a {
  border: 1px solid var(--hairline);
  background: rgba(127,127,127,0.10);
}

.article {
  max-width: var(--content);
}

.articleHeader {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: baseline;
  justify-content: space-between;
}

.articleHeader .meta {
  color: var(--muted);
  font-size: 0.95rem;
}

.utilRow {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 12px 0 18px;
}

.pn {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin: 30px 0 0;
}
.pn a { text-decoration: none; border: 1px solid var(--hairline); padding: 10px 12px; border-radius: 10px; background: var(--card); }
.pn a:hover { opacity: 0.9; }

.anchor {
  opacity: 0;
  margin-left: 8px;
  text-decoration: none;
  color: var(--muted);
}
h2:hover .anchor, h3:hover .anchor, h4:hover .anchor { opacity: 1; }