body {
  margin: 0;
  padding: 0;
  font-family: 'Arial', sans-serif;
  background: linear-gradient(135deg, #0072ff, #00c6ff);
  color: #fff;
  text-align: center;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.container {
  max-width: 600px;
  padding: 20px;
  background: rgba(0,0,0,0.5);
  border-radius: 10px;
  box-shadow: 0px 0px 20px rgba(0,0,0,0.3);
}

.illustration {
  width: 200px;
  margin-bottom: 20px;
}

h1 {
  font-size: 2em;
  margin-bottom: 10px;
}

p {
  margin: 10px 0;
}

.btn {
  display: inline-block;
  margin-top: 20px;
  padding: 12px 20px;
  background: #fff;
  color: #0072ff;
  text-decoration: none;
  border-radius: 5px;
  font-weight: bold;
  transition: background 0.3s, color 0.3s;
}

.btn:hover {
  background: #0072ff;
  color: #fff;
}