.navbar-default .navbar-nav>.active>a, .navbar-default .navbar-nav>.active>a:focus, .navbar-default .navbar-nav>.active>a:hover {
    color: #fff;
    background-color: #006633;
}

.block {
    text-align: center;
    margin: 20px 0 0 0;
}

.block:before {
    content: '\200B';
    display: inline-block;
    height: 100%;
    vertical-align: middle;
}

.centered {
    display: inline-block;
    vertical-align: middle;
    padding: 15px 15px;

}