.calendar-container {
    font-family: Arial, sans-serif;
    width: 400px;
    margin: 20px auto;
  }
  .month-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    border-bottom: 1px solid #ccc;
  }
  .month-name {
    font-size: 18px;
    font-weight: bold;
  }
  .prev-month, .next-month {
    cursor: pointer;
    font-size: 14px;
    color: #999;
  }
  .weekdays {
    display: flex;
    justify-content: space-between;
    padding: 10px;
  }
  .weekday {
    text-align: center;
    font-size: 14px;
    color: #666;
    width: 40px;
  }
  .days {
    display: flex;
    flex-wrap: wrap;
    padding: 10px;
  }
  .day {
    width: 40px;
    height: 40px;
    border: 1px solid #ccc;
    text-align: center;
    line-height: 40px;
    cursor: pointer;
  }
  .selected-day {
    background-color: #e6e6e6;
  }