Tidy CSS in npp test file

/* @media - indents */

@media (max-width:991.98px)
{
    .bd-navbar
    {
        padding-right: .5rem;
        padding-left: .5rem;
    }
}


/* @supports - indents */

@supports ((position:-webkit-sticky) or (position:sticky))
{
    .bd-navbar
    {
        position: -webkit-sticky;
        position: sticky;
        top: 0;
        z-index: 1071;
    }
}


/* @media + @supports - indentation and faulty inserted semicolon */
@media (min-width:768px)
{
    @supports ((position:-webkit-sticky) or (position:sticky))
    {
        .bd-navbar
        {
            position: -webkit-sticky;
            position: sticky;
            top: 0;
            z-index: 1071;
        }
    }
}


/* url(data) - there should be no linebreak after semicolon */
.nav-bg
{
    background-image: url(data:image/png;base64,iVE6JMhCvMPc/ov+3Ox9...lFHILd+UQ55SFXWmo) !important;
}


/* Comments - should always get their own line */

/* comment1 */
.bd-navbar .navbar-nav .nav-link /* comment2 */
{
    padding-right: .5rem; /* comment3 */
    padding-left: .5rem;/* comment4 */
    color: #cbbde2;
}