:root {
  font-family: system-ui, sans-serif;
  color: #142b45;
  background: #ffffff;
  line-height: 1.6;
}

* { box-sizing: border-box; }
body { margin: 0; }
main { max-width: 48rem; margin: 10vh auto; padding: 0 1.5rem; }
header { margin-bottom: 3rem; }
h1 { font-size: clamp(2rem, 5vw, 3rem); line-height: 1.15; letter-spacing: -0.03em; }
h2 { font-size: 1.25rem; }
p { max-width: 65ch; }
header p { color: #4d6178; font-size: 1.125rem; }
section { border-left: 0.25rem solid #215dc2; padding-left: 1.5rem; }
footer { margin-top: 3rem; border-top: 1px solid #d9e2ed; padding-top: 1.5rem; }
a { color: #215dc2; text-underline-offset: 0.2em; }
a:focus-visible { outline: 2px solid currentColor; outline-offset: 4px; }