:root { color-scheme: light; font-family: "Segoe UI", Arial, sans-serif; color: #0f172a; background: #f8fafc; }
* { box-sizing: border-box; }
body { margin: 0; line-height: 1.65; }
header { background: linear-gradient(115deg, #0a49a0, #177ddc 55%, #25a7f0); color: white; padding: 64px 24px; }
header div, main, footer { max-width: 900px; margin: auto; }
nav { margin-top: 20px; }
nav a { color: white; margin-right: 20px; }
main { background: white; padding: 42px; margin-top: 28px; margin-bottom: 28px; border: 1px solid #e2e8f0; border-radius: 18px; }
h1, h2 { line-height: 1.2; }
h1 { font-size: clamp(2.25rem, 6vw, 4.5rem); margin: 8px 0 16px; }
h2 { margin-top: 34px; }
.eyebrow { font-size: .78rem; letter-spacing: .18em; font-weight: 700; opacity: .9; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 26px; }
.cards section { border: 1px solid #dbeafe; border-radius: 14px; padding: 20px; background: #f8fbff; }
.cards h2 { margin-top: 0; font-size: 1.2rem; }
.button { display: inline-block; background: #0a66c2; color: white; padding: 10px 16px; border-radius: 9px; text-decoration: none; font-weight: 600; }
.notice { background: #fff7ed; border-left: 4px solid #f97316; padding: 14px 18px; }
code { background: #f1f5f9; padding: 2px 5px; border-radius: 4px; }
footer { padding: 0 24px 36px; color: #64748b; }
a { color: #0a66c2; }
@media (max-width: 720px) { main { padding: 26px; margin: 16px; } .cards { grid-template-columns: 1fr; } nav a { display: inline-block; margin-bottom: 8px; } }