:root {
  color-scheme: light dark;
  --blue: #0477cc;
  --ink: #0f172a;
  --muted: #526173;
  --surface: #ffffff;
  --background: #f5f7fb;
  --border: #d7e2ee;
}

@media (prefers-color-scheme: dark) {
  :root {
    --blue: #67c5ff;
    --ink: #f8fafc;
    --muted: #cbd5e1;
    --surface: #111820;
    --background: #08111f;
    --border: #334155;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
}

a {
  color: var(--blue);
  font-weight: 700;
}

.site-nav {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.site-nav__inner {
  width: min(940px, calc(100% - 32px));
  min-height: 64px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 20px;
}

.site-nav__brand {
  margin-right: auto;
  color: var(--ink);
  font-size: 20px;
  font-weight: 800;
  text-decoration: none;
}

.site-nav__links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.site-nav__links a {
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
}

main {
  width: min(940px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0;
}

header,
section {
  margin-bottom: 16px;
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
}

h1 {
  margin: 0 0 8px;
  font-size: 38px;
  line-height: 1.15;
  letter-spacing: 0;
}

h2 {
  margin: 0 0 12px;
  font-size: 22px;
  letter-spacing: 0;
}

h3 {
  margin: 18px 0 6px;
  font-size: 16px;
  letter-spacing: 0;
}

p,
li {
  color: var(--muted);
  font-weight: 600;
}

.updated {
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.site-footer {
  width: min(940px, calc(100% - 32px));
  margin: 0 auto;
  padding: 0 0 32px;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 680px) {
  .site-nav__inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
    padding: 14px 0;
  }

  .site-nav__links {
    gap: 12px;
  }

  h1 {
    font-size: 30px;
  }
}