:root {
  color-scheme: light;
  --ink: #17212b;
  --muted: #5f6d78;
  --line: #dce5ea;
  --blue: #0877c9;
  --blue-dark: #07558e;
  --surface: #f5f9fb;
  --white: #ffffff;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--surface);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.65;
}
a { color: var(--blue-dark); }
.shell { width: min(920px, calc(100% - 32px)); margin: 0 auto; }
header { background: var(--white); border-bottom: 1px solid var(--line); }
.nav { display:flex; align-items:center; justify-content:space-between; gap:24px; min-height:76px; }
.brand { color: var(--ink); font-size: 1.35rem; font-weight: 800; letter-spacing: .02em; text-decoration:none; }
nav { display:flex; flex-wrap:wrap; gap:18px; }
nav a { color: var(--muted); text-decoration:none; font-size:.95rem; }
nav a:hover, nav a[aria-current="page"] { color:var(--blue-dark); }
main { padding: 54px 0 72px; }
.card { background:var(--white); border:1px solid var(--line); border-radius:18px; padding: clamp(24px, 5vw, 52px); box-shadow: 0 10px 30px rgba(23,33,43,.05); }
.eyebrow { color:var(--blue-dark); font-weight:700; letter-spacing:.08em; text-transform:uppercase; font-size:.78rem; }
h1 { margin:.35rem 0 1rem; font-size: clamp(2rem, 5vw, 3.2rem); line-height:1.12; letter-spacing:-.03em; }
h2 { margin:2.2rem 0 .6rem; font-size:1.35rem; line-height:1.25; }
h3 { margin:1.5rem 0 .4rem; font-size:1.05rem; }
p, ul { max-width: 72ch; }
.intro { color:var(--muted); font-size:1.08rem; }
.meta { color:var(--muted); font-size:.92rem; }
.links { display:grid; grid-template-columns:repeat(3, 1fr); gap:14px; margin-top:28px; }
.link-card { display:block; padding:18px; border:1px solid var(--line); border-radius:12px; text-decoration:none; background:#fbfdfe; }
.link-card strong { display:block; color:var(--ink); margin-bottom:3px; }
.link-card span { color:var(--muted); font-size:.92rem; }
.notice { border-left:4px solid var(--blue); background:#eef7fd; padding:14px 16px; margin:22px 0; }
footer { border-top:1px solid var(--line); color:var(--muted); padding:24px 0 40px; font-size:.9rem; }
footer .shell { display:flex; flex-wrap:wrap; justify-content:space-between; gap:10px; }
@media (max-width: 650px) { .nav { align-items:flex-start; flex-direction:column; padding:18px 0; gap:10px; } .links { grid-template-columns:1fr; } main { padding-top:28px; } }