:root {
  --primary: #2E6BE6; --bg: #F7F8FB; --surface: #fff;
  --text: #191C22; --muted: #5A606C; --outline: #E2E5EC;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --primary: #8AB4FF; --bg: #111317; --surface: #1B1E24; --text: #E3E6EC; --muted: #B7BCC7; --outline: #33373F; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; display: flex; flex-direction: column; min-height: 100vh; }
a { color: var(--primary); }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; width: 100%; }
main { flex: 1; }
header.top { display: flex; align-items: center; gap: 12px; padding: 18px 0; }
header.top b { font-size: 20px; }
header.top b a { color: var(--text); text-decoration: none; }
header.top nav { margin-left: auto; display: flex; gap: 18px; font-weight: 600; }
header.top nav a { color: var(--text); text-decoration: none; }
.hero { padding: 64px 0; }
.hero h1 { font-size: clamp(32px, 5vw, 48px); line-height: 1.1; margin: 0 0 12px; letter-spacing: -.02em; }
.hero p { font-size: 19px; color: var(--muted); margin: 0; }
article { padding-bottom: 48px; }
article h1 { font-size: 36px; margin: 24px 0 4px; }
article h2 { font-size: 21px; margin: 28px 0 6px; }
article .date { color: var(--muted); margin: 0 0 20px; }
footer { border-top: 1px solid var(--outline); padding: 28px 0 40px; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 18px; }
footer a { color: var(--muted); }