.bpfw-back-image img {
    max-width: 100%;
    display: block;
    height: auto;
    width: auto;
}
.bpfw-set-image-button {
    display: inline-block;
}
.bpfw-remove-image-button {
    display: none;
}
.bpfw-back-image-wrap.has-back-image .bpfw-remove-image-button {
    display: inline-block;
}
.bpfw-back-image-wrap.has-back-image .bpfw-set-image-button {
    display: none;
}