:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --ink: #1b2230;
  --muted: #5b6475;
  --line: #e4e1da;
  --accent: #1f4e79;
  --accent-soft: #e8eef5;
  --serif: Charter, "Bitstream Charter", "Sitka Text", Cambria, Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12161d;
    --surface: #181d26;
    --ink: #e6e8ec;
    --muted: #9aa3b2;
    --line: #2a313d;
    --accent: #8db8e3;
    --accent-soft: #1d2a3a;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header { border-bottom: 1px solid var(--line); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.brand { font-family: var(--serif); font-weight: 700; font-size: 1.25rem; color: var(--ink); letter-spacing: -0.01em; }
.brand:hover { text-decoration: none; }
nav { display: flex; gap: 22px; }
nav a { color: var(--muted); font-size: 0.95rem; font-weight: 500; }
nav a.active, nav a:hover { color: var(--ink); text-decoration: none; }

/* Home hero */
.hero { padding: 64px 0 40px; border-bottom: 1px solid var(--line); }
.eyebrow { text-transform: uppercase; letter-spacing: 0.12em; font-size: 0.75rem; font-weight: 600; color: var(--muted); margin: 0 0 14px; }
.hero h1 { font-family: var(--serif); font-size: clamp(1.9rem, 4.5vw, 2.6rem); line-height: 1.18; letter-spacing: -0.015em; margin: 0 0 18px; font-weight: 700; }
.lede { color: var(--muted); font-size: 1.08rem; margin: 0 0 22px; }
.topics { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.topics .topic { display: inline-block; font-size: 0.82rem; font-weight: 500; padding: 4px 11px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); background: var(--surface); }
a.topic:hover { text-decoration: none; color: var(--accent); border-color: var(--accent); }

/* Topic areas */
.count { font-size: 0.75em; font-weight: 600; color: var(--muted); }
.area-nav { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0 12px; }
.pill { font-size: 0.85rem; font-weight: 500; padding: 5px 12px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); background: var(--surface); }
.pill:hover { text-decoration: none; color: var(--ink); border-color: var(--muted); }
.pill.on { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.pill.on .count { color: var(--bg); opacity: 0.75; }
.area-list { display: grid; gap: 14px; margin-top: 8px; }
.area-card { padding: 20px 22px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); }
.area-card.empty { background: transparent; border-style: dashed; }
.area-card.empty h2 { color: var(--muted); }
.area-card-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.area-card h2 { font-family: var(--serif); font-size: 1.25rem; margin: 0 0 6px; }
.area-card h2 a { color: var(--ink); }
.area-card p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.area-latest { margin: 12px 0 0; padding: 12px 0 0; border-top: 1px solid var(--line); list-style: none; font-size: 0.93rem; }
.area-latest li { margin-bottom: 4px; }
.page-head .eyebrow a { color: var(--muted); }
.meta .tag + .tag { margin-left: -4px; }

/* Sections */
.block { padding: 40px 0 8px; }
.block-head { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 8px; }
.block-head h2 { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--muted); margin: 0; font-weight: 600; }
.block-head a { font-size: 0.9rem; }

/* Post list */
.post-item { padding: 20px 0; border-bottom: 1px solid var(--line); }
.post-item:last-child { border-bottom: 0; }
.post-item h3 { font-family: var(--serif); font-size: 1.3rem; line-height: 1.3; margin: 4px 0 6px; font-weight: 700; }
.post-item h3 a { color: var(--ink); }
.post-item p { margin: 0; color: var(--muted); font-size: 0.98rem; }
.meta { font-size: 0.82rem; color: var(--muted); display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.tag { display: inline-block; font-size: 0.75rem; font-weight: 600; color: var(--accent); background: var(--accent-soft); padding: 2px 8px; border-radius: 4px; }
a.tag:hover { text-decoration: none; filter: brightness(0.97); }

/* Project grid */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 16px; margin-top: 12px; }
.project-card { display: flex; flex-direction: column; gap: 6px; padding: 20px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); color: var(--ink); transition: border-color .15s, transform .15s; }
.project-card:hover { text-decoration: none; border-color: var(--accent); transform: translateY(-1px); }
.project-card .kicker { font-size: 0.75rem; color: var(--muted); font-weight: 500; }
.project-card h3 { margin: 0; font-family: var(--serif); font-size: 1.15rem; line-height: 1.3; }
.project-card p { margin: 0; font-size: 0.93rem; color: var(--muted); flex: 1; }
.project-card .more { font-size: 0.85rem; color: var(--accent); font-weight: 500; margin-top: 6px; }

/* List pages */
.page-head { padding: 48px 0 12px; }
.page-head h1 { font-family: var(--serif); font-size: 2.2rem; margin: 0 0 8px; letter-spacing: -0.015em; }
.page-head .intro p { color: var(--muted); margin: 0; }
.year { font-size: 0.8rem; color: var(--muted); letter-spacing: 0.12em; margin: 28px 0 0; font-weight: 600; }

/* Article */
.post { padding: 48px 0 24px; }
.post-head { margin-bottom: 28px; }
.post-head h1 { font-family: var(--serif); font-size: clamp(1.9rem, 5vw, 2.5rem); line-height: 1.15; letter-spacing: -0.015em; margin: 8px 0 12px; }
.post-head .tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 14px; }
.prose { font-family: var(--serif); font-size: 1.12rem; line-height: 1.72; }
.prose h2 { font-family: var(--sans); font-size: 1.25rem; margin: 2em 0 0.5em; letter-spacing: -0.01em; }
.prose h3 { font-family: var(--sans); font-size: 1.05rem; margin: 1.6em 0 0.4em; }
.prose p, .prose ul, .prose ol { margin: 0 0 1.1em; }
.prose li { margin-bottom: 0.35em; }
.prose blockquote { margin: 1.4em 0; padding: 2px 0 2px 18px; border-left: 3px solid var(--accent); color: var(--muted); }
.prose code { font-family: var(--mono); font-size: 0.88em; background: var(--accent-soft); padding: 1px 5px; border-radius: 4px; }
.prose pre { background: var(--surface); border: 1px solid var(--line); padding: 14px 16px; border-radius: 8px; overflow-x: auto; font-size: 0.9rem; }
.prose pre code { background: none; padding: 0; }
.prose table { width: 100%; border-collapse: collapse; font-family: var(--sans); font-size: 0.92rem; margin: 1.4em 0; display: block; overflow-x: auto; }
.prose th, .prose td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.prose th { font-weight: 600; color: var(--muted); font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.06em; }
.prose img { max-width: 100%; border-radius: 8px; }
.post-foot { margin-top: 40px; padding-top: 18px; border-top: 1px solid var(--line); font-size: 0.88rem; color: var(--muted); }
.post-foot p { margin: 0 0 6px; }

/* Newsletter */
.newsletter { margin: 40px 0 8px; padding: 22px 24px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.newsletter h2 { font-family: var(--serif); font-size: 1.25rem; margin: 0 0 4px; }
.newsletter p { margin: 0; color: var(--muted); font-size: 0.93rem; }
.btn { flex-shrink: 0; display: inline-block; background: var(--accent); color: var(--bg); font-weight: 600; font-size: 0.95rem; padding: 10px 20px; border-radius: 8px; }
.btn:hover { text-decoration: none; filter: brightness(1.1); }
@media (max-width: 560px) { .newsletter { flex-direction: column; align-items: flex-start; } }

/* Footer */
.site-footer { margin-top: 56px; border-top: 1px solid var(--line); padding: 28px 0 40px; font-size: 0.85rem; color: var(--muted); }
.site-footer p { margin: 0 0 6px; }
.site-footer .links { display: flex; gap: 18px; margin-bottom: 12px; }

@media (max-width: 560px) {
  body { font-size: 16px; }
  nav { gap: 14px; }
  nav a { font-size: 0.88rem; }
  .brand { font-size: 1.1rem; white-space: nowrap; }
  .hero { padding: 40px 0 32px; }
  .grid { grid-template-columns: 1fr; }
  .prose { font-size: 1.06rem; }
}