:root {
  --bg: #0b1020;
  --card: #121a30;
  --line: rgba(125, 211, 252, 0.2);
  --accent: #7dd3fc;
  --text: #e2e8f0;
  --muted: #94a3b8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  min-height: 100vh;
}

header {
  padding: 2rem 1.5rem 1rem;
  max-width: 52rem;
  margin: 0 auto;
}

header h1 {
  margin: 0;
  font-size: 1.75rem;
}

header p {
  margin: 0.5rem 0 0;
  color: var(--muted);
  max-width: 40rem;
}

main {
  max-width: 52rem;
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
}

.grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 640px) {
  .grid {
    grid-template-columns: 1fr 1fr;
  }
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1.25rem;
}

.card h2 {
  margin: 0 0 0.75rem;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.card ul {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--muted);
  font-size: 0.95rem;
}

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

.btn {
  display: inline-block;
  margin-top: 0.75rem;
  padding: 0.65rem 1.1rem;
  background: rgba(125, 211, 252, 0.15);
  color: var(--accent);
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
}

.btn:hover {
  background: rgba(125, 211, 252, 0.28);
}

footer {
  text-align: center;
  padding: 2rem;
  color: var(--muted);
  font-size: 0.85rem;
}

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