:root { color-scheme: light; font-family: system-ui, -apple-system, "Segoe UI", sans-serif; color: #202b35; background: #fff; font-size: 16px; line-height: 1.85; }
* { box-sizing: border-box; }
body { margin: 0; }
header, main, footer { max-width: 800px; margin: auto; padding: 24px; }
header { padding-top: 36px; }
h1 { font-size: 1.75rem; margin: 20px 0; }
h2 { font-size: 1.35rem; margin: 0 0 20px; }
h3 { font-size: 1.05rem; margin: 28px 0 10px; }
p, ul { margin: 12px 0; }
a { color: #2458b5; text-underline-offset: .2em; overflow-wrap: anywhere; }
a:focus-visible { outline: 2px solid currentColor; outline-offset: 4px; }
nav { display: flex; flex-wrap: wrap; gap: 12px 24px; font-size: .875rem; }
section { border-top: 1px solid #dce1e6; padding-top: 32px; margin-top: 40px; scroll-margin-top: 24px; }
.notice { border: 1px solid #dce1e6; border-radius: 12px; padding: 16px; }
dt { font-weight: 700; margin-top: 24px; }
dd { margin: 6px 0 0; }
footer { border-top: 1px solid #dce1e6; padding-bottom: 48px; }
@media (max-width: 420px) { header, main, footer { padding-left: 18px; padding-right: 18px; } }