.responsive-ad-wrapper {
    width: 100%;
    max-width: 280px;
    margin: 0 auto;
    height: calc(250px * 0.93);
    position: relative;
    overflow: hidden;
}

.responsive-ad-inner {
    width: 300px;
    height: 250px;
    transform: scale(0.85);
    transform-origin: top left;
}