.polje-sredina {
    grid-area: main;
    width: auto;
    height: auto;
    min-height: 50vh;
    max-width: 80%;
}
.poruka{
    font-size: 1.5em;
    font-weight: 700;
    display: block;
    margin-bottom: 1.3em;
}
#potpis{
    font-size: 1.4em;
    display: block;
    text-shadow: 1px 1px rgb(0, 0, 0, 0.5);
}
.nazad{
    display: block;
    margin-top: 1.5em;
}