:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #10213a;
  background: #f4f7fb;
}

* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; }
.shell { width: min(760px, calc(100% - 40px)); margin: 0 auto; padding: 64px 0; }
.hero { padding: 42px; color: white; border-radius: 30px; background: linear-gradient(135deg, #075bc9, #12a7cd); box-shadow: 0 22px 48px rgba(8, 85, 177, .22); }
.eyebrow { margin: 0 0 12px; font-size: .75rem; font-weight: 800; letter-spacing: .12em; opacity: .78; }
h1 { margin: 0; font-size: clamp(2.1rem, 8vw, 3.6rem); line-height: 1.02; }
.hero > p:last-child { margin: 16px 0 0; max-width: 42ch; line-height: 1.55; opacity: .9; }
.card { margin-top: 22px; padding: 30px; border: 1px solid #dfE7f1; border-radius: 24px; background: white; box-shadow: 0 12px 35px rgba(31, 58, 93, .08); }
.nav-grid { display: grid; gap: 12px; }
.nav-grid a { display: grid; gap: 4px; padding: 18px; color: inherit; text-decoration: none; border-radius: 16px; background: #f5f9ff; }
.nav-grid a:hover { background: #eaf4ff; }
.nav-grid span, .muted { color: #5f7086; line-height: 1.55; }
.page-header { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin-bottom: 22px; }
.brand { color: #0a69ca; font-weight: 800; text-decoration: none; }
.back { color: #0a69ca; text-decoration: none; font-weight: 700; }
h2 { margin: 0; font-size: 1.8rem; }
h3 { margin: 30px 0 8px; font-size: 1.05rem; }
p, li { line-height: 1.65; }
ul { padding-left: 22px; }
a { color: #006ed7; }
.footer { margin-top: 28px; font-size: .88rem; color: #63758a; }
@media (max-width: 560px) { .shell { width: min(100% - 28px, 760px); padding: 28px 0; } .hero, .card { padding: 24px; border-radius: 22px; } }