.photo-card {
    position: relative;
}
.photo-credit {
    position: absolute;
    left: 8px;
    bottom: 8px;
    padding: 2px 6px;
    background: rgba(0, 0, 0, 0.6);
    color: #fff;
    font-size: 12px;
    line-height: 1.2;
    border-radius: 3px;
}