.offer-gallery img,
.offer-gallery video {
    width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}

.offer-gallery video {
    max-width: 100%;
    height: auto;
}

.video_wrapper {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 ratio */
    height: 0;
    overflow: hidden;
    max-width: 100%;
    background: #000;
}

.video_wrapper iframe,
.video_wrapper object,
.video_wrapper embed,
.video_wrapper video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}