.topic-main { width: min(960px, calc(100% - 48px)); margin: 0 auto; padding: 72px 0 96px; }
.topic-header { max-width: 760px; margin-bottom: 64px; }
.topic-header .breadcrumb { display: flex; gap: 8px; align-items: center; color: var(--muted2); font-size: 13px; margin-bottom: 28px; }
.topic-header .breadcrumb a { color: var(--muted); }
.topic-kicker { color: var(--accent2); font-size: 12px; font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; margin-bottom: 10px; }
.topic-header h1 { font-size: clamp(38px, 7vw, 68px); line-height: 1.05; letter-spacing: -.04em; margin-bottom: 24px; }
.topic-header > p:not(.topic-kicker) { max-width: 720px; color: var(--muted); font-size: 17px; margin-top: 14px; }
.topic-section-heading { margin-bottom: 24px; }
.topic-section-heading h2 { font-size: clamp(24px, 4vw, 36px); line-height: 1.15; }
.topic-article-list { list-style: none; display: grid; gap: 12px; }
.topic-article { padding: 24px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.topic-article h2 { font-size: 19px; line-height: 1.35; margin-bottom: 8px; }
.topic-article h2 a { color: var(--text); text-decoration: none; }
.topic-article h2 a:hover { color: var(--accent2); }
.topic-article > p { color: var(--muted); font-size: 14px; line-height: 1.6; }
.topic-editions { margin-top: 14px; }
.topic-editions summary { cursor: pointer; width: fit-content; color: var(--accent2); font-size: 13px; }
.topic-edition-links { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 10px; }
.topic-edition-links a { padding: 5px 9px; border: 1px solid var(--border); border-radius: 999px; color: var(--muted); text-decoration: none; font-size: 12px; }
.topic-edition-links a:hover { color: var(--text); border-color: var(--border2); }
.related-topics { margin-top: 64px; padding-top: 40px; border-top: 1px solid var(--border); }
.related-topics h2 { margin-bottom: 20px; }
.related-topics ul { list-style: none; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.related-topics a { display: block; height: 100%; padding: 20px; border: 1px solid var(--border); border-radius: var(--radius); color: var(--text); text-decoration: none; background: var(--surface); }
.related-topics a:hover { border-color: var(--accent); }
.related-topics strong { display: block; margin-bottom: 6px; }
.related-topics span { display: block; color: var(--muted); font-size: 13px; line-height: 1.55; }
@media (max-width: 640px) {
  .topic-main { width: min(100% - 32px, 960px); padding-top: 48px; }
  .related-topics ul { grid-template-columns: 1fr; }
}