:root {
  --bg: #ffffff;
  --text: #1a1a1a;
  --muted: #5f6368;
  --line: #e6e6e6;
  --accent: #3a6df0;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212;
    --text: #ececec;
    --muted: #a0a0a0;
    --line: #2a2a2a;
    --accent: #7c9cff;
  }
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font:
    17px/1.6 -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    Roboto,
    sans-serif;
}
main {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 16px 64px;
}
nav {
  display: flex;
  gap: 20px;
  margin-bottom: 40px;
  font-size: 15px;
}
nav a:first-child {
  font-weight: 600;
  margin-right: auto;
  color: var(--text);
}
a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}
h1 {
  font-size: 34px;
  line-height: 1.2;
  margin: 0 0 8px;
}
h2 {
  font-size: 21px;
  margin: 36px 0 8px;
}
.lede {
  color: var(--muted);
  margin: 0 0 24px;
}
ul {
  padding-left: 22px;
}
li {
  margin: 6px 0;
}
footer {
  margin-top: 56px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}