:root { color-scheme: light; font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; color: #152033; background: #f5f7fb; }
* { box-sizing: border-box; }
body { margin: 0; }
header, main, footer { max-width: 920px; margin: auto; padding: 24px; }
header { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
header img { width: 160px; height: 80px; object-fit: contain; }
nav { display: flex; gap: 20px; flex-wrap: wrap; }
a { color: #1d4ed8; text-underline-offset: 3px; }
main { background: #fff; border: 1px solid #e4e9f2; border-radius: 20px; margin-bottom: 24px; padding: 36px; }
h1 { font-size: clamp(28px, 5vw, 42px); line-height: 1.2; margin: 0 0 20px; letter-spacing: -.025em; }
h2 { font-size: 23px; margin: 32px 0 12px; line-height: 1.3; }
p { margin: 12px 0; }
li { margin: 8px 0; }
.intro { font-size: 20px; }
.notice { padding: 16px 20px; background: #eef4ff; border-left: 3px solid #2563eb; border-radius: 8px; }
.muted, footer { color: #5c6d85; }
.button { display: inline-block; background: #2563eb; color: #fff; padding: 10px 18px; border-radius: 9px; text-decoration: none; }
a:focus-visible { outline: 3px solid #2563eb; outline-offset: 4px; }
@media (max-width: 600px) { header { align-items: flex-start; flex-direction: column; } main { border-radius: 0; padding: 24px; } }