leptos-use/docs/book/src/custom.css

:root {
    --brand-color: #EF3939;
    --brand-color-dark: #9c2525;
    --background-color: #ffffff;
    --text-color: #856464;
    --devider-light-color: #bbb;
}

.light {
    --fg: #333;
    --links: #c42f2f;
    --sidebar-active: var(--links);
}

.coal {
    --links: #ee6f6f;
    --sidebar-active: var(--links);
}

pre > code {
    border-radius: 5px;
    padding: 1.5rem;
}

.meta-data {
    font-size: 87.5%;
    display: grid;
    grid-template-columns: 70px auto;
    gap: 2rem;
    align-items: flex-start;
    margin: 2rem 0 4rem;
}

.meta-data > div:first-child {
    opacity: 0.5;
}

.sidebar .sidebar-scrollbox {
    padding: 10px 10px 10px 20px ;
}

.chapter li.chapter-item {
    margin: 0;
}

.chapter li.part-title {
    margin-top: 20px;
}

li.chapter-item a {
    padding: 0.1em 1em;
    margin: 0.4em 0 0;
}

li.chapter-item::before {
    content: " ";
    border-left: 1px solid var(--fg);
    opacity: 0.1;
}

li.chapter-item a.active {
    border-left: 1px solid currentColor;
    font-weight: 600;
    margin-left: -1px;
}

li.part-title + li.chapter-item a {
    margin-top: 0;
}

li.chapter-item.affix::before {
    content: none;
}

li.chapter-item.affix a {
    padding-left: 0;
}