.sidebar {
    position: relative;
}
.sidebar-widget-ribbon{
    position: relative;
    z-index: 1;
    margin-right: -30px;
    zoom: 1;
    padding: 0 10px 10px;
    border: 1px solid #ededed;
    background: #fff;
    background: -moz-linear-gradient(top, #ffffff 80%, #ededed 98%); /* FF3.6+ */
    background: -webkit-gradient(linear, left top, left bottom, color-stop(80%,#ffffff), color-stop(98%,#ededed)); /* Chrome,Safari4+ */
    background: -webkit-linear-gradient(top, #ffffff 80%,#ededed 98%); /* Chrome10+,Safari5.1+ */
    background: -o-linear-gradient(top, #ffffff 80%,#ededed 98%); /* Opera 11.10+ */
    background: -ms-linear-gradient(top, #ffffff 80%,#ededed 98%); /* IE10+ */
    background: linear-gradient(top, #ffffff 80%,#ededed 98%); /* W3C */
    box-shadow: 0 1px 1px #fff, 0 13px 5px -10px rgba(0, 0, 0, 0.5);
}
.sidebar-widget:after {
    content: '';
    position: absolute;
    z-index: 0;
    top: -10px;
    right: -41px;
    width: 1px;
    height: 1px;
    border: 10px solid #999;
    border-color: transparent transparent transparent  #999;
}