.header-container{
    min-height: 4.5rem;
    background-color:transparent;
    margin-top: 12px;
    transition: all .35s, margin .35s;
    position: fixed;
    z-index: 1000;
}
.header-container.active{
    background-color: white;
    margin:0px;
    box-shadow: 0 0 2px 1px rgba(0, 0, 0, .1);
}