:root { color-scheme: light dark; font-family: system-ui, -apple-system, "Segoe UI", sans-serif; color: #26313e; background: #f7f9fc; }
* { box-sizing: border-box; }
body { margin: 0; }
header, main, footer { max-width: 780px; margin: 0 auto; padding: 24px; }
header { padding-top: 32px; }
header a { font-weight: 650; text-decoration: none; }
main { padding-top: 16px; padding-bottom: 40px; }
h1 { font-size: clamp(28px, 5vw, 38px); line-height: 1.15; letter-spacing: -.025em; margin: 8px 0 24px; }
h2 { font-size: 19px; line-height: 1.3; margin: 30px 0 10px; }
p { font-size: 16px; line-height: 1.65; margin: 12px 0; }
.date { color: #627185; font-size: 14px; }
a { color: #2d6096; text-underline-offset: 3px; }
a:focus-visible { outline: 2px solid currentColor; outline-offset: 4px; border-radius: 3px; }
footer { display: flex; gap: 24px; border-top: 1px solid #dce3eb; font-size: 14px; padding-bottom: 40px; }
@media (prefers-color-scheme: dark) {
  :root { color: #e1e7ee; background: #11161d; }
  .date { color: #a1afbf; }
  a { color: #9bbfe5; }
  footer { border-color: #303b49; }
}