.imm-ads {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

@media (min-width: 769px) {
    .imm-ads #adform_leaderboard {
        min-height: 210px;
    }

    .imHbBranding #adform_leaderboard {
        min-height: 0px !important;
    }

    .imm-ads #adform_wallpaper_1,
    #adform_wallpaper_2,
    #adform_square_1 {
        min-height: 300px;
    }

    .imm-ads #adform_halfpage_1,
    #adform_halfpage_2 {
        min-height: 600px;
    }

    .imm-ads #adform_boardbottom {
        min-height: 300px;
    }
}

@media (max-width: 768px) {

    .imm-ads #adform_mobilerectangle_1,
    #adform_mobilerectangle_2,
    #adform_mobilerectangle_3,
    #adform_mobilerectangle_4,
    #adform_square_1 {
        min-height: 300px;
    }
}