:root {
  --bg: #fbfbfa;
  --surface: #ffffff;
  --text: #1a1a1a;
  --muted: #5c5c5c;
  --border: #e6e4e0;
  --accent: #4b5bd6;
  --accent-soft: #eef0fc;
  --max: 46rem;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d0d0d;
    --surface: #161616;
    --text: #f2f2f2;
    --muted: #a3a3a3;
    --border: #2a2a2a;
    --accent: #8b97f0;
    --accent-soft: #1b1e33;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
a { color: var(--accent); text-underline-offset: 2px; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 1.25rem; }

header.site { border-bottom: 1px solid var(--border); }
header.site .wrap { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 4rem; flex-wrap: wrap; }
.brand { font-weight: 700; letter-spacing: -0.01em; color: var(--text); text-decoration: none; }
nav a { color: var(--muted); text-decoration: none; margin-left: 1.1rem; font-size: 0.95rem; }
nav a:first-child { margin-left: 0; }
nav a:hover, nav a[aria-current="page"] { color: var(--text); }

main { padding: 3rem 0 4rem; }
h1 { font-size: clamp(1.9rem, 5vw, 2.6rem); line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 1rem; }
h2 { font-size: 1.3rem; letter-spacing: -0.01em; margin: 2.5rem 0 0.75rem; }
h3 { font-size: 1.05rem; margin: 1.75rem 0 0.4rem; }
.lede { font-size: 1.15rem; color: var(--muted); margin: 0 0 2rem; max-width: 36rem; }
.meta { color: var(--muted); font-size: 0.92rem; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); gap: 1rem; margin-top: 1rem; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 1.25rem 1.25rem 1.1rem; }
.card h3 { margin: 0 0 0.35rem; }
.card p { margin: 0 0 0.75rem; color: var(--muted); font-size: 0.97rem; }
.tag { display: inline-block; font-size: 0.78rem; font-weight: 600; color: var(--accent); background: var(--accent-soft); border-radius: 999px; padding: 0.15rem 0.6rem; margin-bottom: 0.6rem; }

.prose p, .prose li { max-width: 40rem; }
.prose ul { padding-left: 1.2rem; }
.prose li { margin: 0.3rem 0; }
.callout { background: var(--accent-soft); border-radius: 12px; padding: 1rem 1.1rem; margin: 1.5rem 0; }

footer.site { border-top: 1px solid var(--border); color: var(--muted); font-size: 0.9rem; }
footer.site .wrap { padding-top: 1.5rem; padding-bottom: 2rem; display: flex; flex-wrap: wrap; gap: 0.5rem 1.25rem; justify-content: space-between; }
footer.site a { color: var(--muted); }