@media screen and (min-width: 770px) {

    div#wrapper > div,
    section#a{
    background: rgba(0,0,0,0.07);
    padding: 11px;
    border: 1px solid rgba(0,0,0,0.1);
    border-radius: 6px;
    box-shadow: inset rgba(0,0,0,0.12) 0 0 4px, rgba(255,255,255,0.3) 0 0 1px;
    }
    
    #wrapper > div{
	margin-top: 20px;
    }

}