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