:root { color-scheme: light; font-family: ui-sans-serif, system-ui, sans-serif; color: #24485d; background: #f3f7fa; }
* { box-sizing: border-box; }
body { margin: 0; }
header { max-width: 68rem; margin: auto; padding: 2rem clamp(1.25rem, 5vw, 4rem); display: flex; justify-content: space-between; gap: 1.5rem; align-items: center; flex-wrap: wrap; }
a { color: inherit; text-underline-offset: .3em; padding-block: .3rem; }
header a:first-child { font-size: 1.5rem; font-weight: 700; text-decoration: none; }
a:focus-visible { outline: 3px solid #477a91; outline-offset: 5px; }
main { max-width: 48rem; padding: 1rem 1.5rem 4rem; margin: auto; }
.lighthouse { display: block; width: min(100%, 20rem); height: auto; margin: 0 auto 2.5rem; }
h1 { font-size: clamp(2.25rem, 6vw, 4rem); line-height: 1.12; letter-spacing: -.04em; font-weight: 650; margin: 0 0 1.5rem; }
p { font-size: 1.1rem; line-height: 1.75; max-width: 60ch; }
.intro { font-size: 1.25rem; }
section { margin-top: 4rem; padding-top: 2rem; border-top: 1px solid #c5d8e2; }
h2 { font-size: 1.35rem; }
footer { max-width: 48rem; margin: auto; padding: 0 1.5rem 2.5rem; font-size: .9rem; }