:root { color-scheme: light; font-family: system-ui, -apple-system, sans-serif; color: #17263b; background: #f4f7fb; line-height: 1.65; }
* { box-sizing: border-box; }
body { margin: 0; }
header, main, footer { max-width: 850px; margin: auto; padding: 24px; }
header { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; align-items: center; }
.brand { font-weight: 800; font-size: 24px; color: #17263b; text-decoration: none; }
nav { display: flex; gap: 24px; }
a { color: #164cac; text-underline-offset: 3px; }
a:focus-visible { outline: 3px solid #164cac; outline-offset: 5px; }
main { background: white; border-radius: 18px; margin-block: 16px; padding: 32px; }
h1 { font-size: clamp(30px, 6vw, 44px); line-height: 1.15; letter-spacing: -0.025em; }
h2 { margin-top: 36px; line-height: 1.3; }
h3 { line-height: 1.4; }
.notice { border-left: 4px solid #997000; background: #fff5d7; padding: 16px; }
.meta, footer { color: #485970; font-size: 14px; }
li { margin-bottom: 10px; }
code { overflow-wrap: anywhere; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 8px; background: white; padding: 10px; }
@media (max-width: 600px) { main { border-radius: 0; padding: 24px 18px; } header, footer { padding: 20px 18px; } }
@media print { body { background: white; } nav, .skip { display: none; } main { padding: 0; } }

nav { flex-wrap: wrap; row-gap: 10px; }
nav a { padding-block: 8px; }
nav [aria-current="page"] { font-weight: 750; text-decoration-thickness: 2px; }
.contents { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-top: 24px; padding-bottom: 16px; border-bottom: 1px solid #dce3ed; }
.cards { display: grid; gap: 16px; margin-top: 28px; }
.card { display: block; border: 1px solid #dce3ed; border-radius: 12px; padding: 20px 24px; text-decoration: none; color: inherit; }
.card:hover { background: #f4f7fb; border-color: #164cac; }
.card h2 { margin: 0; font-size: 23px; }
.card p { margin: 8px 0 14px; }
.card span { color: #164cac; font-weight: 650; }
p, li, a { overflow-wrap: anywhere; }
section { scroll-margin-top: 20px; }