:root {
  --bg: #f6f7f9; --text: #1f2933; --muted: #52606d; --card: #ffffff;
  --line: #e1e5ea; --accent: #e5484d; --face: #e8ecf0; --link: #2a5d8a;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14181d; --text: #e8ecf0; --muted: #a3adb8; --card: #1d232a;
    --line: #2d343c; --face: #2b323a; --link: #8fb8e0;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--link); }
.bar { padding: 16px; max-width: 880px; margin: 0 auto; }
.brand { font-weight: 700; font-size: 20px; text-decoration: none; color: var(--text); display: inline-flex; align-items: center; gap: 10px; }
.dot { width: 18px; height: 18px; border-radius: 50%; background: conic-gradient(var(--accent) 0 66%, var(--face) 66% 100%); }
.page { max-width: 760px; margin: 0 auto; padding: 8px 16px 48px; }
.page h1 { font-size: clamp(28px, 6vw, 40px); line-height: 1.2; margin: 16px 0 8px; }
.page h2 { font-size: 20px; margin: 32px 0 8px; }
.meta { color: var(--muted); margin-top: 0; }
.page li { margin-bottom: 8px; }
.hero { text-align: center; }
.disk { width: min(220px, 60vw); height: auto; margin-top: 24px; }
.face { fill: var(--face); } .fill { fill: var(--accent); } .hub { fill: var(--text); }
.lead { font-size: 19px; color: var(--muted); max-width: 560px; margin: 0 auto 24px; }
.cta { display: inline-block; background: var(--text); color: var(--bg); padding: 12px 22px; border-radius: 999px; text-decoration: none; font-weight: 600; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 16px; margin-top: 40px; text-align: left; }
.grid div { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 16px 18px; }
.grid h2 { margin: 0 0 4px; font-size: 18px; }
.grid p { margin: 0; color: var(--muted); }
.foot { text-align: center; color: var(--muted); padding: 24px 16px 40px; font-size: 15px; }