:root {
  color-scheme: light dark;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --bg: #f7f7f5;
  --surface: #fff;
  --text: #171816;
  --muted: #656960;
  --line: #dfe1dc;
  --accent: #137c78;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #181a18; --surface: #222522; --text: #f3f4ef; --muted: #adb2a9; --line: #3a3f39; --accent: #65d8d0; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); }
main { width: min(100% - 28px, 760px); margin: 28px auto; padding: clamp(20px, 5vw, 42px); background: var(--surface); border: 1px solid var(--line); border-radius: 18px; }
a { color: var(--accent); }
h1 { margin: 0 0 8px; font-size: clamp(30px, 7vw, 46px); letter-spacing: -.04em; }
h2 { margin: 28px 0 8px; font-size: 19px; }
p, li { line-height: 1.62; }
.meta { color: var(--muted); margin-bottom: 26px; }
.notice { padding: 12px 14px; border-left: 3px solid var(--accent); background: color-mix(in srgb, var(--accent) 9%, var(--surface)); }
nav { margin-top: 28px; display: flex; flex-wrap: wrap; gap: 12px; }