.screenshot span {
    width: 70px;
    height: 135px;
    top: 0;
    left: 0;
    z-index: 0;
    background: transparent;
    background: -moz-radial-gradient(right, circle farthest-side,  rgba(255, 255, 255, 0) 40%, rgba(255, 255, 255, 1) 100%); /* FF3.6+ */
    background: -webkit-gradient(right, circle farthest-side,  rgba(255, 255, 255, 0) 40%, rgba(255, 255, 255, 1) 100%); /* Chrome,Safari4+ */
    background: -webkit-radial-gradient(right, circle farthest-side,  rgba(255, 255, 255, 0) 40%, rgba(255, 255, 255, 1) 100%); /* Chrome10+,Safari5.1+ */
    background: -o-radial-gradient(right, circle farthest-side,  rgba(255, 255, 255, 0) 40%, rgba(255, 255, 255, 1) 100%); /* Opera 12+ */
    background: -ms-radial-gradient(right, circle farthest-side,  rgba(255, 255, 255, 0) 40%, rgba(255, 255, 255, 1) 100%); /* IE10+ */
    background: radial-gradient(right, circle farthest-side,  rgba(255, 255, 255, 0) 40%, rgba(255, 255, 255, 1) 100%); /* W3C */
}
.screenshot img {
    float: left;
    margin-right: 10px;
    margin-bottom: 5px;
    margin-top: 5px;
}