.navbar-sharp {
    background-image: none;
}
.navbar-sharp:before {
    color: #fff;
    display: block;
    font-size: 30px;
    line-height: 48px;
    text-align: center;
    position: absolute;
    width: 100%;
}

.env-local   .navbar-sharp { background-color: #3498db; }
.env-local   .navbar-sharp:before { content: "LOCAL"; }

.env-develop     .navbar-sharp { background-color: blueviolet; }
.env-develop     .navbar-sharp:before { content: "VYVOJ"; }

.env-staging .navbar-sharp { background-color: darkgreen; }
.env-staging .navbar-sharp:before { content: "STAGING"; }

.env-test    .navbar-sharp { background-color: orangered; }
.env-test    .navbar-sharp:before { content: "TEST"; }