/* ============================================================
 * article.css
 * Long-form typography & layout used by individual article
 * pages in /articles/<slug>.html.
 *
 * Every article page shares the same shell (header/footer +
 * base/layout/components css); this file is the only extra
 * stylesheet they load.
 * ============================================================ */

/* ---------- article header (title block) ---------- */

.article-page {
  padding: 72px 0 40px;
  border-bottom: 1px solid var(--rule);
}
.article-page .shell > .crumbs {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 32px;
  display: flex;
  gap: 12px;
  align-items: baseline;
  flex-wrap: wrap;
}
.article-page .crumbs a {
  color: var(--muted);
  transition: color .15s ease;
}
.article-page .crumbs a:hover { color: var(--accent); }
.article-page .crumbs .sep { color: var(--muted-2); }
.article-page .crumbs .tag {
  color: var(--accent);
}

.article-header {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 48px;
  padding-bottom: 56px;
}
@media (max-width: 960px) {
  .article-header { grid-template-columns: 1fr; gap: 20px; }
}
.article-header .meta {
  padding-top: 14px;
}
.article-header .meta .row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--rule-soft);
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
}
.article-header .meta .row:last-child { border: 0; }
.article-header .meta .row span:last-child { color: var(--ink); }

.article-header h1 {
  font-weight: 400;
  font-size: clamp(32px, 4.2vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin: 0 0 24px;
  max-width: 22ch;
}
.article-header h1 em {
  font-family: var(--serif);
  font-style: italic;
  color: var(--accent);
  font-weight: 400;
}
.article-header .standfirst {
  font-size: 19px;
  line-height: 1.5;
  color: var(--ink-2);
  max-width: 54ch;
  margin: 0;
  letter-spacing: -0.005em;
}

/* ---------- article body ---------- */

.article-body {
  padding: 64px 0 96px;
  display: grid;
  grid-template-columns: 160px 1fr 200px;
  gap: 48px;
}
@media (max-width: 960px) {
  .article-body { grid-template-columns: 1fr; gap: 0; }
  .article-body .toc { display: none; }
}

.prose {
  max-width: 65ch;
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink-2);
}
.prose > * + * { margin-top: 1.2em; }
.prose h2 {
  font-weight: 400;
  font-size: 28px;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-top: 2.2em;
  margin-bottom: 0.6em;
}
.prose h2 em {
  font-family: var(--serif);
  font-style: italic;
  color: var(--accent);
  font-weight: 400;
}
.prose h3 {
  font-weight: 500;
  font-size: 18px;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin-top: 1.8em;
  margin-bottom: 0.4em;
}
.prose p { margin: 0; }
.prose strong { color: var(--ink); font-weight: 500; }
.prose em { color: var(--ink); font-style: italic; }
.prose a {
  color: var(--ink);
  border-bottom: 1px solid var(--rule);
  transition: color .15s ease, border-color .15s ease;
}
.prose a:hover { color: var(--accent); border-color: var(--accent); }

.prose ul, .prose ol {
  padding-left: 1.4em;
  margin: 0;
}
.prose li + li { margin-top: 0.4em; }
.prose li { padding-left: 0.3em; }

.prose blockquote {
  margin: 1.6em 0;
  padding: 0 0 0 24px;
  border-left: 2px solid var(--accent);
  font-style: italic;
  color: var(--ink);
  font-size: 19px;
  line-height: 1.5;
}
.prose blockquote p + p { margin-top: 0.8em; }

.prose code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: var(--bg-2);
  padding: 2px 6px;
}
.prose pre {
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.55;
  background: var(--bg-2);
  color: var(--ink);
  padding: 20px 24px;
  overflow-x: auto;
  border-left: 2px solid var(--accent);
  letter-spacing: 0;
}
.prose pre code {
  background: transparent;
  padding: 0;
  font-size: inherit;
}

.prose hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 2.4em 0;
}

.prose .callout {
  border: 1px solid var(--rule);
  padding: 20px 24px;
  background: transparent;
  margin: 1.6em 0;
}
.prose .callout .label {
  margin-bottom: 8px;
  display: block;
}
.prose .callout p { margin: 0; font-size: 15px; color: var(--ink-2); }

/* ---------- sticky TOC gutter ---------- */

.toc {
  position: sticky;
  top: 88px;
  align-self: start;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  line-height: 1.6;
  letter-spacing: 0.02em;
}
.toc .label { margin-bottom: 14px; display: block; }
.toc ul { list-style: none; padding: 0; margin: 0; }
.toc li { margin-bottom: 8px; }
.toc a {
  color: var(--muted);
  display: block;
  padding: 3px 0;
  transition: color .15s ease, padding .15s ease;
  border-left: 1px solid var(--rule-soft);
  padding-left: 12px;
}
.toc a:hover, .toc a.active {
  color: var(--accent);
  border-color: var(--accent);
  padding-left: 16px;
}

/* ---------- "more articles" footer ---------- */

.article-more {
  padding: 64px 0 0;
  border-top: 1px solid var(--rule);
}
.article-more .section-head {
  margin-bottom: 32px;
}
.article-more .section-head h2 {
  font-size: 28px;
}