body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background: radial-gradient(circle at top, #0b1020, #05070f);
  color: #fff;
}

header {
  display: flex;
  justify-content: space-between;
  padding: 20px 40px;
  border-bottom: 1px solid rgba(255,255,255,.1);
}

nav a {
  color: #cfd8ff;
  margin-left: 20px;
  text-decoration: none;
}

.hero {
  padding: 100px 20px;
  text-align: center;
}

.cta {
  display: inline-block;
  background: #5b6cff;
  padding: 14px 28px;
  border-radius: 10px;
  color: white;
  text-decoration: none;
  margin-top: 20px;
}