:root {
  color-scheme: light dark;
  font-family: system-ui, sans-serif;
  line-height: 1.75;
  overflow-wrap: anywhere;
}

body { max-width: 48rem; margin: 0 auto; padding: 2rem 1.25rem 4rem; }
h1 { font-size: clamp(1.8rem, 5vw, 2.7rem); line-height: 1.2; }
h2 { margin-top: 2.5rem; font-size: 1.3rem; line-height: 1.4; }
a { color: light-dark(#155e75, #8bd8ee); text-underline-offset: .2em; }
a:focus-visible { outline: 3px solid currentColor; outline-offset: 4px; }
header, footer { padding-block: 1rem; border-bottom: 1px solid #8492a666; }