body {
  background: linear-gradient(135deg, #74ebd5 0%, #ACB6E5 100%);
  font-family: 'Segoe UI', sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}
.container {
  background: white;
  padding: 40px;
  border-radius: 15px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
  text-align: center;
}
button {
  background-color: #4da6ff;
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: 5px;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.3s;
}
button:hover {
  background-color: #0077cc;
}