body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #0b0d21;
  color: #f0f0f5;
  line-height: 1.6;
}
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
}
nav a {
  color: #9ec5ff;
  margin-left: 1.5rem;
  text-decoration: none;
}
section {
  padding: 3rem 2rem;
  max-width: 800px;
  margin: 0 auto;
}
.hero {
  text-align: center;
  padding: 6rem 2rem;
}