header > div > h2 > a::before {
    background-image: url("https://dl.ieclair.pl/data/ricing/web/allegro/aledrogo.png");
        background-color: rgb(28,28,28);
    position: absolute;
    content: "";
    width: 180px;
    height: 53px;
    display: block;
    margin-left: -20px;
    margin-bottom: -2px;
    background-repeat: no-repeat;
    background-size: 10.34pc;
    z-index: 40;
}

nav > div > h2 > a::before {
    background-image: url("https://dl.ieclair.pl/data/ricing/web/allegro/aledrogo.png");
            background-color: rgb(28,28,28);

    position: absolute;
    content: "";
    width: 180px;
    margin-left: -20px;
        margin-bottom: -2px;
    height: 53px;
    display: block;
    background-repeat: no-repeat;
    background-size: 10.34pc;
    z-index: 40;

}