:root {
  --bg: #0f1419;
  --surface: #1a222c;
  --text: #f2f5f8;
  --muted: #9aa7b5;
  --accent: #3d8bfd;
  --border: #2a3542;
  --font: "Segoe UI", "Helvetica Neue", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  background:
    radial-gradient(1200px 600px at 10% -10%, #1b2a3d 0%, transparent 55%),
    radial-gradient(900px 500px at 100% 0%, #243018 0%, transparent 50%),
    var(--bg);
  color: var(--text);
}

main {
  max-width: 880px;
  margin: 0 auto;
  padding: 4rem 1.5rem 3rem;
}

h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(2rem, 4vw, 2.75rem);
  letter-spacing: -0.02em;
}

.lead {
  margin: 0 0 2.5rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.35rem 1.4rem;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.card:hover,
.card:focus-visible {
  border-color: var(--accent);
  transform: translateY(-2px);
  outline: none;
}

.card h2 {
  margin: 0 0 0.4rem;
  font-size: 1.2rem;
}

.card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
  font-size: 0.95rem;
}