.nav-block:active
{
    background-color: blue;
}

.bd-placeholder-img {
font-size: 1.125rem;
text-anchor: middle;
-webkit-user-select: none;
-moz-user-select: none;
user-select: none;
}

@media (min-width: 768px) {
.bd-placeholder-img-lg {
  font-size: 3.5rem;
}
}

.b-example-divider {
height: 3rem;
background-color: rgba(0, 0, 0, .1);
border: solid rgba(0, 0, 0, .15);
border-width: 1px 0;
box-shadow: inset 0 .5em 1.5em rgba(0, 0, 0, .1), inset 0 .125em .5em rgba(0, 0, 0, .15);
}

.b-example-vr {
flex-shrink: 0;
width: 1.5rem;
height: 100vh;
}

.bi {
vertical-align: -.125em;
fill: currentColor;
}

.nav-scroller {
  position: relative;
  z-index: 2;
  height: 2.75rem;
  overflow-y: hidden;
}

.nav-scroller .nav {
  display: flex;
  flex-wrap: nowrap;
  padding-bottom: 1rem;
  margin-top: -1px;
  overflow-x: auto;
  text-align: center;
  white-space: nowrap;
  -webkit-overflow-scrolling: touch;
}

.btn-xs {
    padding: 1px 5px;
    font-size: 12px;
    line-height: 1.5;
    border-radius: 3px;
    border: 1px solid #CCC;
}

.item-menu {
  display: none;  
}

.list-group-item:hover .item-menu {
  display:block;  
}