#cgp-popup {
    display: none;
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.8);
    justify-content: center;
    align-items: center;
    z-index: 9999;
    text-align: center;
}
#cgp-popup img {
    max-width: 90%;
    max-height: 90%;
    margin: auto;
    display: block;
    position: relative;
    top: 50%;
    transform: translateY(-50%);
}
.cgp-close {
    position: absolute;
    top: 20px; right: 30px;
    color: white;
    font-size: 30px;
    cursor: pointer;
}
.cgp-nav {
    color: white;
    font-size: 40px;
    cursor: pointer;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    user-select: none;
    z-index: 10001;
    padding: 10px;
}
.cgp-prev {
    left: 20px;
}
.cgp-next {
    right: 20px;
}