:root { color-scheme: light dark; font-family: system-ui, sans-serif; line-height: 1.6; color: #182b30; background: #f4f6f5; }
* { box-sizing: border-box; }
body { margin: 0; }
header, main, footer { max-width: 48rem; margin: auto; padding: 1.5rem; }
header { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1rem; border-bottom: 1px solid #b6c4c3; }
header > a { font-weight: 700; font-size: 1.3rem; text-decoration: none; }
nav { display: flex; flex-wrap: wrap; gap: 1rem; }
a { color: #005e60; text-underline-offset: .2em; }
a:focus-visible { outline: 3px solid currentColor; outline-offset: 4px; }
main { padding-top: 0; }
section { padding: 2rem 0; border-bottom: 1px solid #b6c4c3; scroll-margin-top: 1rem; }
h1, h2, h3 { line-height: 1.25; }
h1, h2 { font-size: 1.8rem; margin: 0 0 1rem; }
h3 { font-size: 1.1rem; margin: 1.5rem 0 .5rem; }
p { margin: .75rem 0; }
li + li { margin-top: .6rem; }
.links { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 1.5rem; }
.notice { border-left: 3px solid #005e60; padding-left: 1rem; margin-top: 1.5rem; }
footer { font-size: .9rem; }
@media (prefers-color-scheme: dark) {
  :root { color: #e7eeeb; background: #152326; }
  a { color: #8fd8ce; }
  header, section { border-color: #536563; }
  .notice { border-color: #8fd8ce; }
}