.project-nav {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    margin-left: -5px;
    margin-right: -5px;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
	    margin-bottom: 60px;
}

.project-nav li {
    cursor: pointer;
    -webkit-transition: 0.5s;
    -o-transition: 0.5s;
    transition: 0.5s;
    font-weight: 500;
    padding: 2px 20px;
    margin-bottom: 5px;
    margin-left: 5px;
    margin-right: 5px;
    color: #000000;
}

.project-nav li.active {
    background: #FF8F26;
}

.limestone-masonry-filter ul {
    list-style: none;
    padding: 0;
    margin: 0;
}