.overlay, .overlay_privacy {
 width: 100%;
 height: 100%;
 background: rgba(0, 0, 0, 0.4);
 position: fixed;
 top: 0;
 z-index: 110;
 display: none;
}
.modal_close {
 position: absolute;
 top: 10px;
 right: 30px;
 cursor: pointer;
}

.iframe, .privacy_frame {
 width: 90%;
 max-width: 800px;
 min-width: 340px;
 height: 600px;
 position: absolute;
 top: 50%;
 left: 50%;
 transform: translate(-50%, -50%);
 background-color: #fff;
 z-index: 5;
 max-height: 90%;
 box-shadow: 5px 5px 10px #666;
}
.privacy_frame{
    overflow-y: auto;
}
@media screen and (max-width: 768px) {
 .iframe, .privacy_frame {
  height: 400px;
 }
 .modal_close {
  right: 15px;
 }
 }