:root { color-scheme: light; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; color: #182139; background: #f5f7ff; }
* { box-sizing: border-box; }
body { margin: 0; }
main { max-width: 800px; margin: 48px auto; padding: 40px 48px; background: #fff; border: 1px solid #e4e9f5; border-radius: 20px; }
.brand { display: inline-flex; align-items: center; gap: 12px; color: #182139; text-decoration: none; font-size: 17px; font-weight: 650; }
.brand img { display: block; }
h1 { margin: 32px 0 12px; font-size: clamp(30px, 5vw, 44px); line-height: 1.15; letter-spacing: -1px; }
h2 { margin: 32px 0 8px; font-size: 21px; letter-spacing: -.3px; }
p { font-size: 16px; line-height: 1.75; margin: 12px 0; }
.updated { font-size: 14px; color: #65718a; }
.summary { margin: 24px 0; padding: 20px 24px; border-radius: 12px; background: #eef2ff; color: #263d8a; }
a { color: #3450d1; text-underline-offset: 3px; overflow-wrap: anywhere; }
a:hover { color: #2139b0; }
a:focus-visible { outline: 3px solid #4d6bfe; outline-offset: 4px; }
code { font-size: .9em; overflow-wrap: anywhere; }
.primary { display: inline-block; padding: 12px 18px; margin-top: 12px; background: #4d6bfe; border-radius: 8px; color: #fff; text-decoration: none; font-weight: 600; }
.primary:hover { background: #3450d1; color: #fff; }
footer { display: flex; flex-wrap: wrap; gap: 16px; justify-content: space-between; margin-top: 40px; padding-top: 24px; border-top: 1px solid #e4e9f5; font-size: 13px; color: #65718a; }
@media (max-width: 600px) { main { margin: 16px; padding: 28px 22px; border-radius: 14px; } .summary { padding: 16px; } }