nix/doc/manual/custom.css

:root {
    --sidebar-width: 23em;
}

h1.menu-title::before {
  content: "";
  background-image: url("./favicon.svg");
  padding: 1.25em;
  background-position: center center;
  background-size: 2em;
  background-repeat: no-repeat;
}


.menu-bar {
  padding: 0.5em 0em;
}

.sidebar .sidebar-scrollbox {
  padding: 1em;
}

h1:not(:first-of-type) {
    margin-top: 1.3em;
}

h2 {
    margin-top: 1em;
}

.hljs-meta {
    user-select: none;
}