:root {
  color-scheme: light;
  --bg: #fbfaf7;
  --surface: #ffffff;
  --text: #1c2430;
  --muted: #5f6b7a;
  --line: #d8dde4;
  --accent: #146c5c;
  --accent-strong: #0e4f43;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a {
  color: var(--accent-strong);
}

.shell {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.88);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
}

.brand {
  color: var(--text);
  font-size: 1.2rem;
  font-weight: 700;
  text-decoration: none;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.links a {
  color: var(--muted);
  font-size: 0.95rem;
  text-decoration: none;
}

.links a:hover {
  color: var(--accent-strong);
}

.hero {
  padding: 72px 0 48px;
}

.hero h1,
.content h1 {
  margin: 0 0 16px;
  font-size: clamp(2.25rem, 7vw, 4.5rem);
  line-height: 1.05;
  letter-spacing: 0;
}

.hero p {
  max-width: 680px;
  margin: 0;
  color: var(--muted);
  font-size: 1.15rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  padding: 24px 0 72px;
}

.card {
  min-height: 150px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  text-decoration: none;
}

.card h2 {
  margin: 0 0 8px;
  color: var(--text);
  font-size: 1.1rem;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.content {
  max-width: 760px;
  padding: 52px 0 72px;
}

.content h1 {
  font-size: clamp(2rem, 6vw, 3.5rem);
}

.content h2 {
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: 1.35rem;
}

.content p,
.content li {
  color: var(--muted);
}

.content strong {
  color: var(--text);
}

.meta {
  margin-bottom: 32px;
  color: var(--muted);
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 28px 0;
  color: var(--muted);
  font-size: 0.95rem;
}

@media (max-width: 640px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
    padding: 18px 0;
  }

  .hero {
    padding-top: 48px;
  }
}