body {
    font-family: Arial, sans-serif;
  }
  
  .calendar-container {
    max-width: 400px;
    margin: 0 auto;
    padding: 20px;
    border: 1px solid #ccc;
    border-radius: 5px;
  }
  
  h2 {
    text-align: center;
  }
  
  table {
    width: 100%;
    border-collapse: collapse;
  }
  
  table th,
  table td {
    padding: 10px;
    border: 1px solid #ccc;
    text-align: center;
  }
  
  #calendarBody td {
    cursor: pointer;
  }
  
  #calendarBody td.current-day {
    background-color: #e0e0e0;
  }
  
  #calendarBody td.selected {
    background-color: #ffc107;
  }