body {
    background-image: url("/bg-icons-flags/bg.gif");
    background-size: 304px 234px;
    background-position: center;
    color:#212529;
    image-rendering: pixelated;/* chrome */
    image-rendering: -webkit-optimize-contrast; 
    image-rendering: crisp-edges; /* ff */
    image-rendering: -moz-crisp-edges;
    -ms-interpolation-mode: nearest-neighbor;
}


.center{
    display: flex;
    justify-content: center;
}