:root { color-scheme: light; font: 16px/1.5 system-ui, sans-serif; color: #173047; background: #f4f7fa; }
body { margin: 0; }
header { background: #12354c; color: white; padding: 1rem 2rem; }
header h1 { margin: 0 0 .4rem; font-size: 1.25rem; }
nav { display: flex; gap: 1.5rem; }
nav a { color: #d9edf8; }
main { max-width: 62rem; margin: 2rem auto; padding: 0 1rem; display: grid; gap: 1rem; }
section { background: white; border: 1px solid #d6e0e8; border-radius: .5rem; padding: 1rem 1.5rem; }
footer { margin: 2rem; color: #607586; }