:root {
  color-scheme: light;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
  color: #152235;
  background: #f6f8fb;
}

* { box-sizing: border-box; }

body { margin: 0; }

main {
  max-width: 48rem;
  margin: 3rem auto;
  padding: 2rem;
  background: #fff;
  border: 1px solid #dce3eb;
  border-radius: .8rem;
}

h1, h2 { line-height: 1.2; }
h1 { margin-top: 0; }
h2 { margin-top: 2rem; font-size: 1.2rem; }
p, li { max-width: 65ch; }
nav { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 2rem; }
a { color: #07589a; }
a:focus-visible { outline: 3px solid #07589a; outline-offset: 3px; }
.note { padding: 1rem; border-left: 4px solid #447ba8; background: #f0f6fb; }
footer { margin-top: 2.5rem; font-size: .9rem; color: #4b5b6d; }

@media (max-width: 52rem) {
  main { margin: 0; padding: 1.25rem; border: 0; border-radius: 0; }
}