.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    padding-top: 100px;
    left: 0; top: 0;
    width: 100%; height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.4);
  }

  .modal-content {
    background-color: #fff;
    margin: auto;
    padding: 20px;
    border-radius: 8px;
    width: 300px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    text-align: center;
  }

  .close {
    color: #aaa;
    float: right;
    font-size: 20px;
    font-weight: bold;
    cursor: pointer;
  }

  .close:hover {
    color: red;
  }