body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  margin: 0;
  padding: 2rem;
  background: #0b1120;
  color: #e5e7eb;
}

header {
  margin-bottom: 2rem;
}

h1 {
  margin: 0 0 0.5rem;
}

section {
  background: #020617;
  border-radius: 0.75rem;
  padding: 1.5rem;
  margin-bottom: 1rem;
  border: 1px solid #1f2937;
}

button {
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  border: none;
  cursor: pointer;
}