:root {
  color-scheme: light dark;
  --canvas: #f3f5f8;
  --ink: #0e141b;
  --muted: #586473;
  --line: #e1e5ea;
  --accent: #00758f;
}
@media (prefers-color-scheme: dark) {
  :root {
    --canvas: #0a0d11;
    --ink: #e8edf2;
    --muted: #97a2b0;
    --line: #27303a;
    --accent: #4fd0e6;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font: 1rem/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  padding: 0 1rem;
}
header, main, footer { max-width: 44rem; margin: 0 auto; }
header { padding: 1.5rem 0 0.5rem; }
.brand { font-size: 0.8125rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; text-decoration: none; }
main { padding: 1rem 0 2rem; }
h1 { font-size: 1.75rem; line-height: 1.2; margin: 1rem 0; }
h2 { font-size: 1.25rem; margin: 2rem 0 0.5rem; }
h3 { font-size: 1.0625rem; margin: 1.5rem 0 0.5rem; }
.lead { font-size: 1.125rem; color: var(--muted); }
a { color: var(--accent); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
ul, ol { padding-left: 1.4rem; }
.links { list-style: none; padding: 0; }
.links li { margin: 0.5rem 0; }
.scroll { overflow-x: auto; margin: 1rem 0; }
table { border-collapse: collapse; width: 100%; min-width: 34rem; font-size: 0.9375rem; }
th, td { border-bottom: 1px solid var(--line); padding: 0.5rem 0.6rem 0.5rem 0; text-align: left; vertical-align: top; }
footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 0.875rem; padding: 1.5rem 0 calc(2rem + env(safe-area-inset-bottom)); }
footer nav a { margin-right: 1rem; }