#imagePopup {
    display: none;
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.8);
    z-index: 9999;
}

#viewerContainer {
    width: 90%;
    height: 90%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
}

    #viewerContainer img {
        max-width: 100%;
        max-height: 100%;
    }

.viewer-toolbar-custom {
    position: absolute;
    top: 20px;
    right: 20px;
    z-index: 10000;
}

    .viewer-toolbar-custom button {
        margin-left: 10px;
        padding: 8px 14px;
        border: none;
        background: #1976d2;
        color: white;
        cursor: pointer;
        border-radius: 4px;
    }