@media all and (min-width : 980px) {
    /* OK */
    div {
        color:#000;
    }

    /* OK */
    div#withId {
        color:#000;
    }

    /* Error - Unexpected dot found, Unexpected brace found */
    div:nth-child(1) {
        color:#000;
    }

    /* Error - Unexpected dot found, Unexpected brace found */
    div.withClassAndNthChild:nth-child(1) {
        color:#000;
    }

    /* Errror - Unexpected hash found, Unexpected brace found */
    div#withIdAndNthChild:nth-child(1) {
        color:#000;
    }
}