.panel-categories {
    overflow: hidden;
    position: relative;
    border-radius: 1px;
    margin-bottom: 30px;
}
.panel-categories .caption {
    color: #fff;
    font-weight: 600;
    font-size: 1.2em;
    margin-bottom: 15px;
    padding: 10px 15px;
    position: absolute;
    border: 2px solid #fff;
    bottom: 10px;
    left: 40px;
}
.panel-categories:hover .caption {
    background-color: #000;
}
.panel-categories img {
    display: block;
    max-width: 100% !important;
    height: auto !important;
}