/*.btn-default,.btn-primary,.btn-success,.btn-info,.btn-warning,.btn-danger {*/
.btn {
    -webkit-box-shadow: 2px 3px 0px rgba(4, 4, 4, 0.3);
    -moz-box-shadow:    2px 3px 0px rgba(4, 4, 4, 0.3);
    box-shadow:         2px 3px 0px rgba(4, 4, 4, 0.3);
    border-radius:0;
}

/*.btn-default:active,.btn-primary:active,.btn-success:active,.btn-info:active,.btn-warning:active,.btn-danger:active {*/
.btn:active{
    margin-top: 3px;
    margin-bottom: -3px;
}