OpenDroneMap-WebODM/app/static/app/js/css/ImagePopup.scss

.image-popup{
    div{
        margin-top: 8px;
    }

    div.title{
        margin-top: 0;
        font-weight: bold;
        max-width: 300px;
        text-overflow: ellipsis;
        white-space: nowrap;
        overflow: hidden;
    }

    div.image{
        a{
            cursor: zoom-in;
        }
        &.fullscreen{
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            i{
                font-size: 200%;
                position: absolute;
                left: 50%;
                top: 45%;
            }
            a{
                cursor: zoom-out;
            }
            img{
                max-width: 100%;
                max-height: 100%;
            }
        }
    }   
}