:root { color-scheme: light; }
* { box-sizing: border-box; }
body { margin: 0; color: #222; background: #fff; font: 16px/1.7 system-ui, sans-serif; }
a { color: #245a91; text-underline-offset: 3px; }
a:hover { color: #123654; }
.site-header, .site-footer { max-width: 1000px; margin: auto; padding: 24px; }
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 24px; border-bottom: 1px solid #eee; }
.site-name { color: #222; font-weight: 600; text-decoration: none; }
.site-header nav, .site-footer { display: flex; flex-wrap: wrap; gap: 20px; }
.site-header nav a { text-decoration: none; }
main { max-width: 808px; margin: 0 auto; padding: 40px 24px 64px; }
main.main-wide { max-width: 1100px; }
h1 { margin: 0 0 24px; font-size: clamp(28px, 4vw, 38px); line-height: 1.25; letter-spacing: -.025em; }
h2, h3, h4 { line-height: 1.35; margin-top: 32px; }
p { margin: 0 0 20px; }
main img, main video { max-width: 100%; height: auto; }
main > img { display: block; margin: 24px 0; }
iframe { display: block; width: 100%; aspect-ratio: 16 / 9; height: auto; border: 0; margin: 24px 0; }
pre { overflow-x: auto; padding: 16px; background: #f6f6f6; }
.post-date { color: #777; font-size: 14px; margin-top: -12px; margin-bottom: 28px; }
.site-footer { border-top: 1px solid #eee; font-size: 14px; color: #666; }
.blog-list { margin: 0; padding: 0; list-style: none; }
.blog-list li { padding: 18px 0; border-bottom: 1px solid #eee; }
.blog-list a { font-size: 18px; }
.blog-list time { display: block; font-size: 13px; color: #777; margin-top: 4px; }
:focus-visible { outline: 2px solid #245a91; outline-offset: 4px; }
@media (max-width: 600px) { .site-header, .site-footer { padding: 20px; } .site-header { gap: 16px; } .site-header nav { gap: 14px; } main { padding: 30px 20px 48px; } }