:root {
  --bg: #f4f7fb;
  --fg: #012f59;
  --muted: #3d5a73;
  --card: #ffffff;
  --line: #d5e0ea;
  --link: #0155c4;
}
* { box-sizing: border-box; }
html { color-scheme: light; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.65;
}
header, footer {
  background: var(--card);
  border-color: var(--line);
}
header {
  position: sticky;
  top: 0;
  border-bottom: 1px solid var(--line);
}
header .bar, footer .bar, main {
  max-width: 42rem;
  margin: 0 auto;
  padding: 0 1.25rem;
}
header .bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 3.5rem;
  gap: 1rem;
}
header a.brand {
  font-family: system-ui, sans-serif;
  font-weight: 700;
  color: var(--fg);
  text-decoration: none;
  letter-spacing: 0.02em;
}
nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  font-family: system-ui, sans-serif;
  font-size: 0.875rem;
}
nav a, footer a { color: var(--muted); }
nav a:hover, footer a:hover, article a { color: var(--link); }
main { padding: 2.5rem 1.25rem 4rem; }
.kicker {
  font-family: system-ui, sans-serif;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0;
}
h1 {
  font-size: 2rem;
  line-height: 1.2;
  margin: 0.4rem 0 0;
}
.updated {
  color: var(--muted);
  font-family: system-ui, sans-serif;
  font-size: 0.875rem;
  margin: 0.5rem 0 2rem;
}
h2 {
  font-size: 1.15rem;
  margin: 2rem 0 0.6rem;
}
p, li { font-size: 1.02rem; }
ul { padding-left: 1.25rem; }
li { margin: 0.35rem 0; }
footer {
  border-top: 1px solid var(--line);
  padding: 1.5rem 0;
  font-family: system-ui, sans-serif;
  font-size: 0.875rem;
  color: var(--muted);
}
footer .bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem;
}
strong { font-weight: 700; }