.muncul{
    position: fixed;
    top: 0;
    left: 0;
    background: rgba(0,0,0,.9);
    height: 100%;
    width: 100%;
    z-index: 100;
    display: none;
}
.muncul span{
    position: absolute;
    top: 0;
    right: 10px;
    font-size: 40px;
    font-weight: bolder;
    color: #fff;
    cursor: pointer;
    z-index: inherit;
}
.muncul img{
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: 5px solid #fff;
    border-radius: 5px; 
    max-width: 450px;
    object-fit: cover;
}
@media (max-width:768px){
            .muncul .popup img{
                width: 95%px;
                height: 75%;
                object-fit: cover;
            }
        }