:root {
  color-scheme: light dark;
  --bg: #fbfbfa;
  --fg: #1a1a18;
  --muted: #6b6b66;
  --line: #e4e4e0;
  --accent: #3b5bdb;
  --code-bg: #f0f0ed;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16161a;
    --fg: #e8e8e4;
    --muted: #9a9a94;
    --line: #2c2c32;
    --accent: #8ea3f0;
    --code-bg: #212127;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
main { max-width: 40rem; margin: 0 auto; padding: 4rem 1.5rem 4rem; }
h1 { font-size: 1.85rem; line-height: 1.2; margin: 0 0 .35rem; letter-spacing: -.02em; }
h2 { font-size: 1.05rem; margin: 2rem 0 .5rem; letter-spacing: -.01em; }
p { margin: .7rem 0; }
.sub { color: var(--muted); margin: 0 0 2rem; }
ul { padding-left: 1.15rem; margin: .7rem 0; }
li { margin: .3rem 0; }
a { color: var(--accent); text-underline-offset: 2px; }
code {
  background: var(--code-bg); padding: .1em .35em; border-radius: 4px;
  font: .875em/1.4 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  overflow-wrap: anywhere;
}
footer {
  margin-top: 3rem; padding-top: 1.1rem; border-top: 1px solid var(--line);
  font-size: .9rem;
}