:root {
  --bg: #f3f6f4;
  --ink: #1a1d21;
  --muted: #4c5a63;
  --accent: #5b8a8c;
  --accent-dark: #3d5a5c;
  --accent-light: #8fb3b5;
  --archive: #8a7b6b;
  --positive: #6b8a6e;
  --destructive: #b85c5c;
  --card: #ffffff;
  --line: #d7dfda;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Manrope", "Avenir Next", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 85% -10%, #dbe9e9 0%, transparent 60%),
    radial-gradient(1000px 500px at -10% 30%, #edf1e7 0%, transparent 55%),
    var(--bg);
  line-height: 1.6;
}

main {
  max-width: 860px;
  margin: 0 auto;
  padding: 48px 20px 64px;
}

header {
  margin-bottom: 24px;
}

.brand {
  font-size: 15px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-dark);
  font-weight: 700;
}

h1 {
  font-size: clamp(34px, 6vw, 56px);
  line-height: 1.04;
  margin: 10px 0 14px;
  letter-spacing: -0.03em;
}

.lead {
  color: var(--muted);
  font-size: 19px;
  max-width: 62ch;
}

.card {
  margin-top: 24px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px;
}

h2 {
  margin: 0 0 10px;
  font-size: 26px;
  line-height: 1.2;
}

ul {
  margin: 12px 0 0;
  padding-left: 20px;
}

a {
  color: var(--accent-dark);
  text-decoration: none;
  border-bottom: 1px solid rgba(91, 138, 140, 0.35);
}

a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.nav {
  margin-top: 16px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

small, .muted {
  color: var(--muted);
}

@media (max-width: 640px) {
  main { padding-top: 30px; }
  .card { padding: 18px; border-radius: 12px; }
}