body {
  font-family: Arial, sans-serif;
  background-color: #f5f5f5;
  color: #333;
  margin: 0;
  padding: 0;
}
.container {
  max-width: 600px;
  margin: 50px auto;
  padding: 20px;
}
h1 {
  text-align: center;
  margin-bottom: 30px;
}
.card {
  background: #fff;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
.button {
  display: inline-block;
  margin-top: 15px;
  padding: 10px 20px;
  text-decoration: none;
  background-color: #007bff;
  color: #fff;
  border-radius: 4px;
}