.bgnd {
    background-attachment: fixed;
    background-size: cover;
    height: 76vh;
    max-height: 1200px;
    min-height: 200px;
}

section.bgnd {
    margin-top: 50px;
}    

.display-table {
    display: table; 
    width: 100%; 
    height: 100%; 
    text-align: left;
}
.display-table-cell{
    vertical-align: middle; 
    display: table-cell;
}

header + .bgnd {
    height: 86vh;

}



/* Wyłącz efekt parallax dla tabletow and smartfonow */
@media only screen and (max-width: 768px) {
.bgnd {
   background-attachment: scroll;
}
}