:root {
  color-scheme: light;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #10294d;
  background: #fdf9fd;
}

* { box-sizing: border-box; }
body { margin: 0; line-height: 1.65; }
header { padding: 42px 20px 24px; text-align: center; }
.brand { color: #9b68ef; font-size: 18px; font-weight: 800; letter-spacing: .04em; }
main { width: min(860px, calc(100% - 32px)); margin: 0 auto 48px; padding: 32px clamp(20px, 5vw, 52px); background: #fff; border: 1px solid #eee5fa; border-radius: 28px; box-shadow: 0 10px 30px rgba(72, 42, 110, .07); }
h1 { margin: 8px 0 10px; font-size: clamp(30px, 6vw, 46px); line-height: 1.15; }
h2 { margin: 34px 0 10px; font-size: 22px; line-height: 1.3; }
h3 { margin: 22px 0 8px; font-size: 17px; }
p, li { font-size: 16px; }
ul, ol { padding-left: 24px; }
.meta { color: #65799b; font-size: 14px; }
.notice { padding: 18px 20px; background: #f3ecff; border-radius: 18px; }
a { color: #7444ca; }
nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px 20px; margin-top: 20px; }
nav a { font-size: 14px; }
footer { padding: 0 20px 48px; color: #65799b; text-align: center; font-size: 14px; }
@media (max-width: 520px) { header { padding-top: 28px; } main { padding: 24px 20px; border-radius: 22px; } }