:root {
  color-scheme: light;
  --bg: #f7f7f5;
  --fg: #25313b;
  --accent: #366782;
  --muted: #64717b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 system-ui, sans-serif;
}

.container {
  width: min(100% - 40px, 1000px);
  margin: auto;
}

header {
  background: white;
  border-bottom: 1px solid #ddd;
  padding: 20px 0;
}

nav {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

nav a { margin-right: 16px; }

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

h1 {
  font-size: clamp(2.5rem, 7vw, 5rem);
  line-height: 1.1;
}

main { padding: 80px 0; }

.lead {
  color: var(--muted);
  font-size: 1.25rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 60px;
}

.card {
  background: white;
  padding: 30px;
  border: 1px solid #ddd;
  border-radius: 12px;
}

footer {
  border-top: 1px solid #ddd;
  padding: 25px 0;
  color: var(--muted);
}

@media(max-width:700px) {
  .cards { grid-template-columns: 1fr; }
  main { padding: 40px 0; }
}