body {
  margin: 0;
  padding: 0;
  font-family: Arial, sans-serif;
  background: linear-gradient(to right, #f5f7fa, #c3cfe2);
  color: #333;
}
.container {
  max-width: 600px;
  margin: 100px auto;
  padding: 20px;
  background: white;
  border-radius: 10px;
  box-shadow: 0 10px 20px rgba(0,0,0,0.1);
  text-align: center;
}
h1 {
  color: #2c3e50;
}
ul {
  text-align: left;
  margin-top: 20px;
}
.button {
  display: inline-block;
  margin-top: 20px;
  padding: 10px 20px;
  background-color: #3498db;
  color: white;
  text-decoration: none;
  border-radius: 5px;
}
.button:hover {
  background-color: #2980b9;
}