:root { color-scheme: light; font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
* { box-sizing: border-box; }
body { margin: 0; background: #f5f8fc; color: #182735; line-height: 1.65; }
header, main, footer { max-width: 900px; margin: auto; padding: 24px; }
header { padding-top: 36px; }
nav { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-top: 12px; }
a { color: #0054a6; }
a:focus-visible { outline: 3px solid #0054a6; outline-offset: 3px; }
nav a[aria-current="page"] { font-weight: 700; }
h1 { font-size: clamp(2rem, 5vw, 3rem); line-height: 1.15; margin: 10px 0 16px; }
h2 { font-size: 1.35rem; line-height: 1.3; margin-top: 32px; }
p, ul, aside { max-width: 76ch; }
li + li { margin-top: 7px; }
.brand { color: #0054a6; font-weight: 800; font-size: 1.2rem; text-decoration: none; }
.notice { background: #fff8ed; border-left: 5px solid #b56000; border-radius: 8px; padding: 16px 20px; margin: 18px 0; }
.action { display: inline-block; padding: 12px 18px; border-radius: 8px; background: #0054a6; color: white; font-weight: 700; text-decoration: none; }
footer { padding-bottom: 48px; }