#dvKapak {
    position: fixed;
    left: 0px;
    top: 0px;
    width: 100%;
    height: 100%;
    background-color: #555;
    opacity: 0.8;
    z-index: 2000;
    visibility: hidden;
}
.sPencere {
    position: absolute;
    border-radius: 7px;
    z-index: 2001;
    box-shadow: 5px 5px 5px black;
}