body {
  margin: 0;
  padding: 0;
  background: radial-gradient(circle at top left, #0d47a1, #1a237e);
  color: #fff;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.container {
  text-align: center;
  background: rgba(255, 255, 255, 0.1);
  padding: 2rem 3rem;
  border-radius: 12px;
  box-shadow: 0 0 20px rgba(0,0,0,0.3);
}
h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}
p {
  font-size: 1.2rem;
  margin: 0.5rem 0;
}