:root {
  color-scheme: light;
  --bg: #f7f7f8;
  --surface: #ffffff;
  --text: #111113;
  --muted: #6e6e73;
  --line: #e5e5ea;
  --accent: #2f86ff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.5;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.shell {
  width: min(920px, calc(100% - 40px));
  margin: 0 auto;
}

header {
  padding: 28px 0 12px;
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0;
}

.links {
  display: flex;
  gap: 16px;
  font-size: 14px;
}

.hero {
  padding: 72px 0 56px;
}

.hero h1 {
  max-width: 720px;
  margin: 0;
  font-size: clamp(40px, 7vw, 72px);
  line-height: 1.02;
  letter-spacing: 0;
}

.hero p {
  max-width: 620px;
  margin: 20px 0 0;
  font-size: 20px;
  color: var(--muted);
}

.section {
  padding: 24px 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
}

.card h2,
.card h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

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

.content {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 28px;
  margin: 28px 0 56px;
}

.content h1 {
  margin-top: 0;
}

.content h2 {
  margin-top: 28px;
}

footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
  padding: 24px 0 36px;
}

@media (max-width: 700px) {
  .links {
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .hero {
    padding-top: 48px;
  }

  .grid {
    grid-template-columns: 1fr;
  }
}