Blazorise Vertical Sidebar always on top and collapsed

I would like in my Blazor PWA wasm the Sidebar always on top and collpased.

I tried adding to class 'collapse' but the Sidebar disappear.

<div class="sidebar collapse"><NavMenu /></div>

I tried wid @media(min-width 2048px) on app.css but on 640px all return to default. Seems that 'min-width' is not working.

.sidebar {    width: 250px;    transition: width 0.3s;}@media (min-width: 2048px) {    .sidebar {        width: 60px;         overflow: hidden;    }    .main-content {        margin-left: 60px;     }}

I'm really frustrated.Some suggestion? thanks!