.gallery {
    margin: 0 auto 18px;
}
.gallery .gallery-item {
    float: left;
    margin-top: 0;
    text-align: center;
    width: 33%;
}
.gallery-columns-2 .gallery-item {
    width: 50%;
}
.gallery-columns-4 .gallery-item {
    width: 25%;
}
.gallery img {
    border: 2px solid #cfcfcf;
}
.gallery-columns-2 .attachment-medium {
    max-width: 92%;
    height: auto;
}
.gallery-columns-4 .attachment-thumbnail {
    max-width: 84%;
    height: auto;
}
.gallery .gallery-caption {
    color: #888;
    font-size: 12px;
    margin: 0 0 12px;
}
.gallery dl {
    margin: 0;
}
.gallery img {
    border: 10px solid #f1f1f1;
}
.gallery br+br {
    display: none;
}
#content .attachment img {/* single attachment images should be centered */
    display: block;
    margin: 0 auto;
}