:root {
  --bg: #ffffff;
  --fg: #1c2024;
  --muted: #5b646e;
  --line: #d9dee3;
  --accent: #1b5fa7;
  --note-bg: #f3f6fa;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14181c;
    --fg: #e6e9ec;
    --muted: #9aa4ae;
    --line: #2c333a;
    --accent: #7fb2e8;
    --note-bg: #1b2128;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
header, main, footer {
  max-width: 44rem;
  margin: 0 auto;
  padding: 0 1.25rem;
}
header { padding-top: 1.5rem; padding-bottom: 1rem; border-bottom: 1px solid var(--line); }
.site-name { font-weight: 700; font-size: 1.1rem; color: var(--fg); text-decoration: none; }
nav { margin-top: .4rem; }
nav a { margin-right: 1.1rem; color: var(--accent); text-decoration: none; }
nav a:hover, nav a[aria-current="page"] { text-decoration: underline; }
main { padding-top: 1.5rem; padding-bottom: 2rem; }
h1 { font-size: 1.8rem; line-height: 1.25; margin: .5rem 0 1rem; }
h2 { font-size: 1.25rem; margin: 2rem 0 .5rem; }
p, li { max-width: 40rem; }
a { color: var(--accent); }
.note {
  background: var(--note-bg);
  border-left: 4px solid var(--accent);
  padding: .75rem 1rem;
  margin: 1.25rem 0;
  border-radius: 0 6px 6px 0;
}
table { border-collapse: collapse; width: 100%; margin: 1rem 0; font-size: .95rem; }
th, td { border: 1px solid var(--line); padding: .5rem .6rem; text-align: left; vertical-align: top; }
th { background: var(--note-bg); }
footer { padding-top: 1rem; padding-bottom: 2rem; border-top: 1px solid var(--line); color: var(--muted); font-size: .9rem; }
@media (max-width: 40rem) {
  table { display: block; overflow-x: auto; }
}