.esm-modal {
    display: none; /* Verborgen standaard */
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.4);
  }
  .esm-modal-content {
    background-color: #fefefe;
    margin: 10% auto;
    padding: 20px;
    border: 1px solid #888;
    width: 80%;
    max-width: 500px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
  }
  .esm-close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
  }
  .esm-close:hover,
  .esm-close:focus {
    color: black;
    text-decoration: none;
  }