Remove old css file, and add the new, compiled one.

app.css

@@ -1,177 +0,0 @@
-#sidebar-menu {
-  background-color: #f5f5f5;
-  border-right: 1px solid #ccc;
-  position: fixed;
-  overflow-y: auto;
-  width: 250px;
-  height: 100%;
-}
-
-ul {
-  padding: 0;
-  margin: 0;
-}
-
-li {
-  list-style: none;
-  padding: 0;
-}
-
-.sidebar__level-1 {
-  padding: .5rem 1rem;
-}
-
-.sidebar__level-1, .sidebar__level-2 {
-  padding-left: 15px;
-}
-
-.sidebar__level-2 {
-  margin-left: 15px;
-}
-
-.sidebar__level-1:hover,
-.sidebar__level-2--item:hover {
-  cursor: pointer;
-  background-color: rgba(0, 0, 0, 0.05);
-}
-
-#sidebar-menu .sidebar__level-2--item {
-  padding: 0 20px 0 0;
-}
-
-#sidebar-menu .sidebar__level-2--item .fa.pull-right {
-  position: relative;
-  top: 2px;
-}
-
-#sidebar-menu .fa-star-o {
-  color: #f5f5f5;
-}
-
-#sidebar-menu .sidebar__level-2--item:hover .fa-star-o {
-  color: #000;
-}
-
-#sidebar-menu .sidebar__level-2--item .fa-star-o:hover {
-  color: #000;
-}
-
-#sidebar-menu .fa-star {
-  color: #666;
-}
-
-.sidebar__level-1 {
-  font-size: 2rem;
-  line-height: 3rem;
-}
-
-.sidebar__level-1--item {
-  margin-top: 0;
-}
-
-.sidebar__level-1--item:nth-child(1) {
-  margin: 0;
-}
-
-#sidebar-menu .sidebar__actions--list {
-  margin-top: 1rem;
-}
-
-.sidebar__action--item {
-  text-align: center;
-}
-
-.sidebar__action {
-  width: 80%;
-}
-
-.sidebar__level-2--item.active {
-  background-color: #555;
-  color: #fff;
-}
-
-.sidebar__level-2--item.active i {
-  display: none;
-}
-
-.menu--bottom {
-  position: absolute;
-  bottom: 0;
-  left: 0;
-  width: 100%;
-}
-
-.menu--bottom .sidebar__level-1 {
-  background-color: transparent;
-  padding: 1rem;
-}
-
-#main-content {
-  margin-left: 250px;
-}
-
-.pane-title {
-  margin-bottom: 1em;
-}
-
-.keymap__name.active,
-.keymap__abbrev.active {
-  box-shadow: 0 0 0px 1px #ccc, 0 0 5px 0px #ccc;
-  border-color: transparent;
-}
-
-.keymap__name,
-.keymap__abbrev {
-  border: none;
-  border-bottom: 2px dotted #999;
-}
-
-.keymap__name,
-.keymap__name.active,
-.keymap__abbrev,
-.keymap__abbrev.active {
-  padding: 0 .5rem;
-  margin: 0 .25rem;
-}
-
-.keymap__is-default.fa-star {
-  color: #333;
-}
-
-.keymap__is-default.fa-star-o {
-  color: #333;
-}
-
-.keymap__is-default:hover {
-  color: #555;
-  cursor: pointer;
-}
-
-.uhk {
-  max-width: 100%;
-}
-
-.owl-carousel {
-  max-width: 991px;
-  margin: auto;
-}
-
-.owl-carousel .item img {
-  display: block;
-  width: 100%;
-  height: auto;
-}
-
-.sidebar__level-1 .fa.fa-chevron-down,
-.sidebar__level-1 .fa.fa-chevron-up {
-  margin-right: 1rem;
-  font-size: 1.5rem;
-  position: relative;
-  top: .5rem;
-  display: none;
-}
-
-.sidebar__level-1:hover .fa.fa-chevron-down,
-.sidebar__level-1:hover .fa.fa-chevron-up {
-  display: inline-block;
-}