:root {
  --canvas: #f7f7f8;
  --ink: #18181b;
  --muted: #52525b;
  --rule: #e4e4e7;
  --accent: #1d4ed8;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --canvas: #0b0c0e;
    --ink: #f4f4f5;
    --muted: #a1a1aa;
    --rule: #27272a;
    --accent: #60a5fa;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

main, footer {
  max-width: 38rem;
  margin: 0 auto;
  padding: 0 16px;
}

main { padding-top: 4rem; padding-bottom: 2rem; }

.kicker {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 { margin: 0.25rem 0 1rem; font-size: 2rem; line-height: 1.2; }
h2 { margin: 2.5rem 0 0.5rem; font-size: 1.15rem; }
.lead { font-size: 1.2rem; }
ul { padding-left: 1.2rem; }

a { color: var(--accent); text-underline-offset: 0.15em; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

footer {
  margin-top: 2rem;
  padding-top: 1.5rem;
  padding-bottom: 3rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.85rem;
}

footer p { margin: 0.2rem 0; }