.btn-attr-wrapper {
    border: solid 1px #eee;
    border-radius: 4px;
    background-color: #f6f6f6;
    margin-right: 0.5em;
    padding-left: 0.25em;
    padding-right: 0.25em;

}

.btn-attr-wrapper:hover {
    background-color: #fcfcfc;
    border: solid 1px #999;
}