:root {
  color-scheme: light;
  --navy: #12233f;
  --blue: #2459b8;
  --blue-soft: #eaf1ff;
  --red: #d43c47;
  --ink: #1d2939;
  --muted: #5f6c80;
  --line: #dfe6ef;
  --paper: #ffffff;
  --wash: #f5f8fc;
}

* { box-sizing: border-box; }
html { font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
body { margin: 0; background: var(--wash); color: var(--ink); line-height: 1.65; }
a { color: var(--blue); }
.shell { width: min(880px, calc(100% - 32px)); margin: 0 auto; }
header { background: var(--navy); color: white; }
.nav { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 12px; color: white; text-decoration: none; font-weight: 800; }
.mark { width: 38px; height: 38px; border-radius: 12px; background: linear-gradient(135deg, var(--blue) 0 49%, white 49% 66%, var(--red) 66%); border: 1px solid rgba(255,255,255,.35); }
nav { display: flex; flex-wrap: wrap; gap: 18px; }
nav a { color: rgba(255,255,255,.86); text-decoration: none; font-size: .92rem; }
main { padding: 54px 0 72px; }
.hero { padding: 34px; background: var(--paper); border: 1px solid var(--line); border-radius: 24px; box-shadow: 0 16px 44px rgba(18,35,63,.08); }
.eyebrow { color: var(--blue); font-weight: 800; letter-spacing: .08em; text-transform: uppercase; font-size: .78rem; }
h1 { color: var(--navy); font-size: clamp(2rem, 5vw, 3.4rem); line-height: 1.08; margin: 10px 0 18px; }
h2 { color: var(--navy); font-size: 1.45rem; margin: 38px 0 10px; }
h3 { color: var(--navy); margin: 24px 0 6px; }
p, li { color: var(--muted); }
.lead { font-size: 1.1rem; max-width: 700px; }
.notice { margin-top: 24px; padding: 18px 20px; background: var(--blue-soft); border-left: 4px solid var(--blue); border-radius: 10px; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; margin-top: 24px; }
.card { padding: 20px; background: var(--paper); border: 1px solid var(--line); border-radius: 16px; text-decoration: none; }
.card strong { display: block; color: var(--navy); margin-bottom: 5px; }
.meta { color: var(--muted); font-size: .9rem; }
footer { border-top: 1px solid var(--line); padding: 28px 0 44px; font-size: .88rem; color: var(--muted); }
code { background: var(--blue-soft); padding: 2px 6px; border-radius: 5px; }
@media (max-width: 680px) {
  .nav { padding: 18px 0; align-items: flex-start; flex-direction: column; }
  .hero { padding: 24px; }
  main { padding-top: 30px; }
}