.calendar {
    width: 100%;
    max-width: 500px;
    margin: auto;
    border: 1px solid #8a8a8a;
    border-radius: 6px;
    font-size: 14px;
    overflow: hidden;
  }
  
  .calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #3491f3;
    color: white;
    padding: 10px;
    font-weight: bold;
  }
  
  .calendar-header button {
    background: transparent;
    border: none;
    color: white;
    font-size: 18px;
    cursor: pointer;
  }
  
  .calendar-table {
    width: 100%;
    border-collapse: collapse;
    text-align: center;
  }
  
  .calendar-table th,
  .calendar-table td {
    padding: 10px;
    border: 1px solid #eee;
    cursor: pointer;
  }
  
  .calendar-table td.empty {
    background-color: #ffffff;
    cursor: default;
  }