:root {
  color-scheme: light;
  --ink: #17211b;
  --muted: #5d6a62;
  --green: #287a4d;
  --green-dark: #175d38;
  --soft: #edf7f1;
  --line: #dce7df;
  --white: #ffffff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  background: #f8fbf9;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

a { color: var(--green-dark); }

.site-header {
  background: var(--white);
  border-bottom: 1px solid var(--line);
}

.nav {
  width: min(1080px, calc(100% - 40px));
  min-height: 72px;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  color: var(--ink);
  font-size: 1.25rem;
  font-weight: 800;
  text-decoration: none;
}

.nav-links { display: flex; flex-wrap: wrap; gap: 22px; }
.nav-links a { color: var(--muted); text-decoration: none; font-weight: 600; }
.nav-links a:hover { color: var(--green); }

main { width: min(860px, calc(100% - 40px)); margin: 56px auto 80px; }

.hero {
  padding: 64px 48px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: linear-gradient(145deg, var(--white), var(--soft));
}

.eyebrow { color: var(--green); font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
h1 { margin: 8px 0 18px; font-size: clamp(2.2rem, 7vw, 4.5rem); line-height: 1.03; letter-spacing: -.04em; }
h2 { margin-top: 40px; line-height: 1.25; }
p, li { color: var(--muted); }
.lead { max-width: 670px; font-size: 1.16rem; }

.button {
  display: inline-block;
  margin-top: 18px;
  padding: 12px 20px;
  color: var(--white);
  background: var(--green);
  border-radius: 12px;
  font-weight: 750;
  text-decoration: none;
}

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 28px; }
.card { padding: 24px; border: 1px solid var(--line); border-radius: 18px; background: var(--white); }
.card h2 { margin-top: 0; }
.document { padding: 42px 48px; border: 1px solid var(--line); border-radius: 24px; background: var(--white); }
.document h1 { font-size: clamp(2.2rem, 6vw, 3.6rem); }
.updated { color: var(--green); font-weight: 700; }
.notice { padding: 18px 20px; border-left: 4px solid var(--green); background: var(--soft); border-radius: 8px; }

footer {
  padding: 28px 20px;
  color: var(--muted);
  text-align: center;
  border-top: 1px solid var(--line);
  background: var(--white);
}

@media (max-width: 720px) {
  .nav { align-items: flex-start; flex-direction: column; padding: 18px 0; }
  .nav-links { gap: 14px; }
  main { margin-top: 32px; }
  .hero, .document { padding: 32px 24px; }
  .cards { grid-template-columns: 1fr; }
}