:root {
  color: #0a2440;
  background: #fbfaf7;
  font: 17px/1.65 Inter, ui-sans-serif, system-ui, sans-serif;
  --navy: #043258;
  --orange: #d94800;
  --line: #d9d9d4;
}

* { box-sizing: border-box; }
body { margin: 0; }

.page-shell {
  width: min(760px, calc(100% - 40px));
  margin: 0 auto;
  padding: 64px 0 72px;
}

.site-nav,
.site-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
}

.site-nav { align-items: center; margin-bottom: 58px; }
.site-nav a:first-child { margin-right: auto; font-weight: 800; text-decoration: none; }
.site-nav [aria-current="page"] { color: var(--navy); font-weight: 800; }

h1,
h2 {
  line-height: 1.15;
  letter-spacing: -.03em;
}

h1 { max-width: 700px; margin: 0 0 22px; font-size: clamp(2.25rem, 7vw, 4rem); }
h2 { margin-top: 2.25rem; font-size: 1.55rem; }
p, li { color: #344b61; }
a { color: var(--orange); text-underline-offset: 3px; }
code { padding: 1px 5px; background: #eceae4; border-radius: 4px; }
.notice { margin: 28px 0; border-left: 4px solid #ff5b16; padding: 1px 0 1px 20px; }
.site-footer { margin-top: 58px; padding-top: 24px; border-top: 1px solid var(--line); font-size: .9rem; }
.site-footer p { flex-basis: 100%; margin: 0; }

@media (max-width: 560px) {
  .page-shell { padding-top: 30px; }
  .site-nav a:first-child { flex-basis: 100%; margin-bottom: 4px; }
}