.hidden {display:none;}
#resa-popup {position:fixed;top:0;left:0;width:100%;height:100%;display:flex;justify-content:center;align-items:center;background:rgba(0,0,0,0.5);visibility:hidden;opacity:0;transition:opacity .3s;}
#resa-popup.hidden {visibility:hidden;opacity:0;}
#resa-popup:not(.hidden) {visibility:visible;opacity:1;}
.popup-overlay {position:absolute;top:0;left:0;width:100%;height:100%;}
.popup-content {
    padding: 40px;
    background-color: #fff;
    box-shadow: 0px 0px 10px #333;
    max-width: 600px;
    border-radius: 8px;
    width: 100%;
    z-index: 10;
}
.popup-content input,
.popup-content textarea,
.popup-content select {
    margin-top: 10px;
    width: 100%;
    box-sizing: border-box;
}
.popup-close {position:absolute;top:10px;right:10px;cursor:pointer;}