gmx.css/src/_nav.css

A micro Material Design 3 based CSS-only framework.

main>aside {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    padding: 0 .75rem;
}

main>aside>:is(menu, .row) {
    display: flex;
    height: 100%;
    justify-content: center;
    flex-direction: column;
    padding: 0;
    margin: 0;
}

main>article {
    width: 93.5%;
    margin: 0 0 0 auto;
    padding: 0 1.5rem;
}

@media screen and (max-width: 64em) {
    main>aside {
        background: var(--m3-scheme-surface);
        top: auto;
        bottom: 0;
        padding: .25rem 0;
        width: 100%;
        z-index: 100;
        height: min-content;
    }

    main>aside>:is(menu, .row) {
        justify-content: space-around;
        flex-direction: row;
    }

    main {
        padding: 0 1rem;
        margin: 0 auto 2rem;
    }

    main>article {
        width: 100%;
        padding: 0 0 !important;
        margin-bottom: 2.25rem;
    }

    :is(dialog, .dialog) {
        min-width: 100% !important;
        width: 100%;
    }
}

:is(nav, .row):not(.segmented),
.list-box>*,
.menu>*,
label.checkbox *,
label.radio *,
.field:has(i) {
    display: flex;
    align-items: center;
    align-self: normal;
    text-align: start;
}


:is(nav, .row) *:not(main>aside *, :is(h1, h2, h3, h4, h5, h6)) {
    margin-bottom: 0;
    margin-top: 0;
}

main>aside li,
main>aside li:has(*>i)>* {
    width: 3.5rem;
    margin: .25rem 0;
    cursor: pointer;
    display: flex;
    text-align: center;
    list-style-type: none;
    align-self: center;
    flex-direction: column;
    justify-content: center;
    color: inherit;
}

main>aside li span {
    font-size: .75rem;
    font-weight: 500;
}

main>aside li i {
    width: 100%;
    display: flex;
    align-self: center;
    flex-direction: column;
    justify-content: center;
    padding: .25rem;
    border-radius: var(--m3-util-rounding-full);
    transition: .1s;
}

main>aside li.active i {
    background: var(--m3-scheme-secondary-container);
}

main>aside li i * {
    font-size: 1.5rem;
}

main>article>section {
    margin: 3.5rem 0;
}

main>aside * {
    align-self: center;
}