body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
  }
  header {
    text-align: center;
    padding: 20px;
    background: #007BFF;
    color: white;
  }
  .doctor-card {
    border: 1px solid #ccc;
    padding: 10px;
    margin: 10px;
    border-radius: 5px;
  }