.header{
    width: 100%;
    height: 80px;
    background-color: #fff;
    position: fixed;
    z-index: 1;
    background-image: url(https://blueform.pl/projekty2024/FE_SL_kolor_poziom_br.png);
    background-position: center;
    background-repeat: no-repeat;
    background-size: contain;
    background-position: center;
    border-bottom: 1px solid #bababa;
}
h1{
    text-align: center;
}
.container{
    padding-top: 80px
}