.lab-jump nav{grid-template-columns:repeat(4,1fr)}
.lab-jump a:nth-child(2){border-color:#805da1}
.lab-jump a:nth-child(3){border-color:#4275a8}
.lab-jump a:nth-child(4){border-color:#df7448}
@media(max-width:850px){.lab-jump nav{grid-template-columns:1fr}}