img[src$='#center'] {
    display: block;
    margin: 0.7rem auto;
}

img[src$='#float-left'] {
    float: left;
    margin: 0.7rem 1rem 0.7rem 0;
}

img[src$='#float-right'] {
    float: right;
    margin: 0.7rem 0 0.7rem 1rem;
}