body {
    background-color: #f1f1f1;
}

.logo {
    background-image: url(../gfx/moczul.ski-logotyp.svg);
    background-position: center;
    background-size: contain;
    background-repeat: no-repeat;
    position: absolute;
    left: 50%;
    top: 50%;
    width: 300px;
    height: 300px;
    margin-top: -150px;
    margin-left: -150px;
}