:root { color-scheme: light; font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; color: #1c3047; background: #f2f5f9; line-height: 1.65; }
* { box-sizing: border-box; }
body { margin: 0; padding: 48px 20px; }
main { max-width: 820px; margin: auto; padding: 44px 52px; background: #fff; border: 1px solid #dce4ed; border-radius: 18px; }
h1 { color: #12375b; font-size: clamp(2rem, 5vw, 2.8rem); line-height: 1.15; letter-spacing: -.04em; margin: 10px 0 24px; }
h2 { color: #173e65; font-size: 1.18rem; margin: 0 0 10px; }
p { margin: 0 0 14px; }
.intro { font-size: 1.13rem; color: #43566b; }
.eyebrow { color: #496b8d; font-size: .83rem; font-weight: 650; letter-spacing: .08em; text-transform: uppercase; }
section { padding-top: 26px; margin-top: 22px; border-top: 1px solid #e6ebf2; }
a { color: #145c9b; text-underline-offset: 3px; }
a:hover { color: #0a3861; }
code { font-size: .95em; background: #edf3f9; padding: 1px 5px; border-radius: 4px; }
footer { margin-top: 36px; padding-top: 20px; border-top: 1px solid #dce4ed; font-size: .84rem; color: #5b6c80; }
@media (max-width: 600px) { body { padding: 16px 10px; } main { padding: 28px 23px; border-radius: 12px; } }