:root { color-scheme: light; font-family: system-ui, -apple-system, "Segoe UI", sans-serif; color: #172033; background: #f6f8fb; }
* { box-sizing: border-box; }
body { margin: 0; line-height: 1.6; }
main { width: min(100% - 2rem, 48rem); margin: 0 auto; padding: 3rem 0 4rem; }
header { border-bottom: 1px solid #d8deea; background: #fff; }
header .inner { width: min(100% - 2rem, 48rem); margin: 0 auto; padding: 1rem 0; display: flex; justify-content: space-between; gap: 1rem; align-items: center; }
a { color: #174ea6; text-underline-offset: 0.16em; }
nav { display: flex; gap: 1rem; flex-wrap: wrap; }
h1 { font-size: clamp(2rem, 7vw, 3rem); line-height: 1.15; margin: 0 0 1.25rem; }
h2 { margin-top: 2rem; line-height: 1.25; }
p, li { font-size: 1rem; }
section { background: #fff; border: 1px solid #d8deea; border-radius: .75rem; padding: 1.25rem; margin: 1rem 0; }
footer { color: #526074; font-size: .9rem; margin-top: 2rem; }
@media (max-width: 390px) { main { width: min(100% - 1.25rem, 48rem); padding-top: 2rem; } header .inner { width: min(100% - 1.25rem, 48rem); } }