:root {
  --bg: #ffffff;
  --text: #1c2026;
  --dim: #5b6470;
  --line: #dfe3e8;
  --accent: #2f6fde;
  --panel: #f5f7f9;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171c;
    --text: #e6e9ee;
    --dim: #9aa4b1;
    --line: #2a3038;
    --accent: #7aa7ff;
    --panel: #1c2027;
  }
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}
main,
header,
footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 16px;
}
header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  padding-top: 28px;
}
.brand {
  color: var(--text);
  font-size: 18px;
  font-weight: 650;
  text-decoration: none;
}
nav a {
  margin-left: 14px;
}
nav a:first-child {
  margin-left: 0;
}
h1 {
  margin: 36px 0 8px;
  font-size: 32px;
  line-height: 1.2;
}
h2 {
  margin: 34px 0 6px;
  font-size: 20px;
}
p,
ul {
  margin: 10px 0;
}
ul {
  padding-left: 22px;
}
li {
  margin: 5px 0;
}
a {
  color: var(--accent);
}
.lead {
  color: var(--dim);
  font-size: 18px;
}
.meta {
  color: var(--dim);
  font-size: 14px;
}
.note {
  margin: 18px 0;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}
section + section {
  margin-top: 56px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
}
footer {
  margin-top: 56px;
  padding-top: 18px;
  padding-bottom: 36px;
  border-top: 1px solid var(--line);
  color: var(--dim);
  font-size: 14px;
}