body {
  font-family: Arial, sans-serif;
  background-color: #f5f5f5;
  text-align: center;
}

.container {
  margin: 50px auto;
  width: 90%;
  max-width: 600px;
  background: #fff;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.btn {
  display: block;
  margin: 10px auto;
  padding: 10px 20px;
  background-color: #007bff;
  color: white;
  text-decoration: none;
  border-radius: 5px;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  border: 1px solid #ddd;
  padding: 8px;
}