.nadpis {
    background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url("obrazok.jpg");
    background-size: cover;
    background-position: top;
    min-height: 60%;
}

.navbar {
    position: sticky;
    top: 0;
}

.navbar a.split {
    float: right;
    background-color: #2D3142;
    color: white;
}

.obrazok {
    width: 70%;
    height: auto;
}