:root {
  --primary: #1E3A5F;
  --ink: #16222F;
  --sub: #5E6C7B;
  --bg: #EDF2F7;
  --line: rgba(22, 40, 60, .12);
  --card: #ffffff;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}
.site-header {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 10px;
  max-width: 760px; margin: 0 auto; padding: 20px 24px;
}
.brand { font-weight: 800; font-size: 20px; color: var(--primary); text-decoration: none; letter-spacing: -.02em; }
.site-nav a { color: var(--sub); text-decoration: none; font-size: 14px; font-weight: 600; margin-left: 16px; }
.site-nav a:hover { color: var(--primary); }
main.page { max-width: 760px; margin: 0 auto; padding: 8px 24px 44px; background: var(--card); }
@media (min-width: 800px) {
  main.page { margin: 14px auto; border-radius: 18px; box-shadow: 0 1px 2px var(--line); }
}
h1 { font-size: 30px; font-weight: 800; letter-spacing: -.02em; margin: 16px 0 6px; }
h2 { font-size: 21px; font-weight: 700; margin: 30px 0 8px; }
h3 { font-size: 16px; font-weight: 700; margin: 20px 0 6px; }
p, li { font-size: 16px; color: #243240; }
a { color: var(--primary); }
ul, ol { padding-left: 22px; }
li { margin: 5px 0; }
strong { color: var(--ink); }
em { color: var(--sub); }
hr { border: none; border-top: 1px solid var(--line); margin: 28px 0; }
.site-footer { max-width: 760px; margin: 0 auto; padding: 22px 24px 40px; color: var(--sub); font-size: 13px; text-align: center; }
.site-footer p { color: var(--sub); margin: 4px 0; }
.site-footer a { color: var(--sub); }
.site-footer .links a { margin: 0 2px; }