:root {
  color-scheme: light;
  --ink: #162238;
  --muted: #57657a;
  --paper: #f5f7fa;
  --card: #ffffff;
  --brand: #176b87;
  --brand-dark: #0d465d;
  --line: #dfe5eb;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

a { color: var(--brand-dark); }
a:hover { text-decoration-thickness: 2px; }

.shell { width: min(920px, calc(100% - 36px)); margin-inline: auto; }

header {
  padding: 22px 0;
  color: #fff;
  background: var(--brand-dark);
}

header .shell { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { color: #fff; font-size: 1.2rem; font-weight: 760; text-decoration: none; }
nav { display: flex; flex-wrap: wrap; gap: 18px; }
nav a { color: #fff; font-size: .93rem; }

main { padding: 72px 0 88px; }
.hero { max-width: 760px; margin-bottom: 46px; }
.eyebrow { color: var(--brand); font-size: .8rem; font-weight: 760; letter-spacing: .12em; text-transform: uppercase; }
h1 { margin: 10px 0 18px; font-size: clamp(2.35rem, 7vw, 4.7rem); line-height: 1.04; letter-spacing: -.045em; }
h2 { margin-top: 2.3em; line-height: 1.2; }
h3 { margin-bottom: .35em; }
.lead { color: var(--muted); font-size: 1.22rem; }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card { padding: 24px; background: var(--card); border: 1px solid var(--line); border-radius: 16px; }
.card p { color: var(--muted); }
.notice { padding: 20px 22px; background: #e9f5f8; border-left: 4px solid var(--brand); border-radius: 8px; }
.meta { color: var(--muted); font-size: .92rem; }
ul { padding-left: 1.25rem; }

footer { padding: 30px 0; color: var(--muted); background: #fff; border-top: 1px solid var(--line); }
footer .shell { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; }
footer p { margin: 0; }
footer div { display: flex; flex-wrap: wrap; gap: 16px; }

@media (max-width: 720px) {
  header .shell { align-items: flex-start; flex-direction: column; }
  main { padding-top: 48px; }
  .grid { grid-template-columns: 1fr; }
}