main {
    position: fixed;
    inset: 0;
    z-index: 10;
    background: #111
}

.bg {
    position: fixed;
    inset: 0;
    z-index: 2;
}

aside {
    height: 100%;
    width: 300px;
    display: inline-block;
}

* {
    color: white;
    font-family: "Noto Sans", "Segoe UI", "CMS", sans-serif;
}