.modal {
    display: none;
    position:fixed;
    z-index: 99;
    padding-top: 100px;
    left:0;
    top:0;
    background-color: rgb(0,0,0);
    background-color: rgba(0,0,0,0.4);
    overflow: auto;
    width:100%;
    height:100%;
}

.modal-content {
    margin: auto;
    text-align: center;
    display:flex;
    flex-direction: column;
    width:800px;
    height:600px;
}

.close {
  padding:2px;
  border: 1px solid gray;
  background-color:gray;
  color: #aaaaaa;
  float: right;
  font-size: 28px;
  font-weight: bold;
}

.close:hover,
.close:focus {
    color:#000;
    text-decoration: none;
    cursor: pointer;
}