:root {
  --bg: #ffffff;
  --bg-alt: #f3f6f5;
  --text: #1b2421;
  --muted: #56625e;
  --accent: #0f7a5c;
  --accent-text: #ffffff;
  --border: #dfe6e3;
  --badge-bg: #e3f3ed;
  --badge-text: #0b5e47;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101614;
    --bg-alt: #17201d;
    --text: #e7eeeb;
    --muted: #a2b0ab;
    --accent: #4cc79f;
    --accent-text: #0c1311;
    --border: #26322e;
    --badge-bg: #1d3a30;
    --badge-text: #8fe0c3;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}
a { color: var(--accent); }
.container { max-width: 1040px; margin: 0 auto; padding: 0 16px; }
.site-header { border-bottom: 1px solid var(--border); }
.nav {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 8px 16px; padding: 14px 16px;
}
.logo { font-weight: 700; font-size: 1.2rem; color: var(--text); text-decoration: none; }
.logo span { color: var(--accent); }
.sister { font-size: 0.95rem; color: var(--muted); }
.sister a { font-weight: 600; text-decoration: none; }
.sister a:hover { text-decoration: underline; }
.hero { padding: 80px 0 64px; text-align: center; }
.hero h1 { font-size: clamp(1.9rem, 6vw, 3rem); line-height: 1.15; margin: 0 0 16px; }
.hero p { font-size: 1.1rem; color: var(--muted); max-width: 620px; margin: 0 auto; }
.section { padding: 56px 0; }
.section.alt { background: var(--bg-alt); }
.section h2 { margin: 0 0 24px; font-size: 1.6rem; }
.cards {
  display: grid; gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}
.card {
  border: 1px solid var(--border); border-radius: 12px;
  padding: 20px; background: var(--bg);
}
.card h3 { margin: 12px 0 8px; font-size: 1.15rem; }
.card p { margin: 0; color: var(--muted); }
.badge {
  display: inline-block; font-size: 0.75rem; font-weight: 600;
  letter-spacing: 0.04em; text-transform: uppercase;
  padding: 2px 10px; border-radius: 999px;
  background: var(--badge-bg); color: var(--badge-text);
}
.crosslink p { margin: 0 0 20px; color: var(--muted); max-width: 620px; }
.btn {
  display: inline-block; padding: 12px 24px; border-radius: 8px;
  background: var(--accent); color: var(--accent-text);
  font-weight: 600; text-decoration: none;
}
.btn:hover { opacity: 0.9; }
.site-footer {
  border-top: 1px solid var(--border); padding: 24px 0;
  color: var(--muted); font-size: 0.9rem;
}
.site-footer p { margin: 4px 0; }
a.card { display: block; color: inherit; text-decoration: none; }
a.card:hover { border-color: var(--accent); }
a.card:hover h3 { text-decoration: underline; }
.article { max-width: 700px; padding: 40px 16px 56px; }
.article .back { font-size: 0.95rem; text-decoration: none; }
.article .back:hover { text-decoration: underline; }
.article h1 { font-size: clamp(1.7rem, 5vw, 2.4rem); line-height: 1.2; margin: 16px 0 8px; }
.article .meta { color: var(--muted); font-size: 0.95rem; margin: 0 0 24px; }
.article h2 { font-size: 1.35rem; margin: 36px 0 12px; }
.article ul, .article ol { padding-left: 1.3em; }
.article li { margin: 6px 0; }
.summary {
  background: var(--bg-alt); border: 1px solid var(--border);
  border-left: 4px solid var(--accent); border-radius: 8px;
  padding: 16px 20px; margin: 0 0 8px;
}
.summary p { margin: 0; }
.sources { font-size: 0.95rem; color: var(--muted); }