.caption {
    width:100%;
    bottom: .3rem;
    position: absolute;
    background:#000;
    background: -webkit-linear-gradient(bottom, #000 40%, rgba(0, 0, 0, 0) 100%) repeat scroll 0 0 rgba(0, 0, 0, 0);
    background: -moz-linear-gradient(bottom, #000 40%, rgba(0, 0, 0, 0) 100%) repeat scroll 0 0 rgba(0, 0, 0, 0);
    background: -o-linear-gradient(bottom, #000 40%, rgba(0, 0, 0, 0) 100%) repeat scroll 0 0 rgba(0, 0, 0, 0);
    background: linear-gradient(to top, #000 40%, rgba(0, 0, 0, 0) 100%) repeat scroll 0 0 rgba(0, 0, 0, 0);
}

.thumbnail {
    border: 0 none;
    box-shadow: none;
    margin:0;
    padding:0;
}

.caption h4 {
    color: #fff;
    -webkit-font-smoothing: antialiased;
}