body {
  background: #0f172a;
  color: white;
  font-family: Arial, sans-serif;
  text-align: center;
  padding-top: 80px;
}

h1 {
  font-size: 3rem;
}

p {
  opacity: 0.8;
}

.btn {
  display: inline-block;
  margin-top: 30px;
  padding: 12px 24px;
  background: #3b82f6;
  color: white;
  text-decoration: none;
  border-radius: 8px;
  font-weight: bold;
}