@media screen and (min-width:320px) and (max-width:767px) {
    .leaderboardDiv {
        display: none
    }

    .showcaseDiv {
        display: block
    }
}
@media only screen and (max-width: 1023px) {
    .showcaseDiv {margin: 0 calc((100% - 300px)/ 2) 20px;}
}
@media screen and (min-width:320px) and (max-width:767px) {
    .showcaseDiv {margin: 0 calc((100% - 300px)/ 2) 20px;}
    .leaderboardDiv .leaderboard{min-width: 320px;min-height: 50px;}

}
@media screen and (min-width:320px) and (max-width:767px) {
}
.leaderboardDiv .adTtl {
    border: 0;
    padding: 0 !important;
}
.showcaseDiv .adTtl {
    border: 0;
    padding: 0 !important;
}