.zu-camera {
    z-index: 100001;
    opacity: 0.5;
    position: fixed;
    top: 0px;
    height: 100%;
    width: 100%;
    background: transparent;
}

.zu-camera::after {
    position: fixed;
    content: '';
    width: 200px;
    height: 200px;
    box-shadow: 0 0 0 1000px #000;
    left: 50%;
    transform: translate(-50%, 50%);
    top: 35px;
}