:root { color-scheme: light dark; font-family: system-ui, sans-serif; line-height: 1.65; color: #172d3a; background: #f8fafb; }
body { max-width: 48rem; margin: 0 auto; padding: 1.25rem; }
header { border-bottom: 1px solid #92a7b2; padding-bottom: 1rem; }
header p { font-weight: 650; }
nav { display: flex; gap: 1.5rem; flex-wrap: wrap; }
a { color: #005778; text-underline-offset: .2em; overflow-wrap: anywhere; }
a:focus-visible { outline: 3px solid #aa5400; outline-offset: 4px; }
nav a { display: inline-block; padding: .5rem 0; }
main { margin: 2rem 0 3rem; }
h1 { font-size: 2.1rem; line-height: 1.2; }
h2 { font-size: 1.3rem; line-height: 1.35; margin-top: 2rem; }
p, dd { max-width: 70ch; }
dt { font-weight: 650; margin-top: 1.25rem; }
dd { margin: .35rem 0 0; }
.notice { border-left: 3px solid #986000; padding-left: 1rem; }
footer { border-top: 1px solid #92a7b2; font-size: .9rem; }
@media (prefers-color-scheme: dark) {
  :root { color: #e8f0f3; background: #11202a; }
  a { color: #8ad6f3; }
  .notice { border-color: #eab76c; }
}