libvirt/docs/css/mobile-libvirt.css

@media (max-width: 1000px) {
    #the-virtualization-api > h1,
    #the-virtualization-api > h2 {
       display: none;
    }

    #the-virtualization-api section,
    #the-virtualization-api .section,
    #documentation section,
    #documentation .section,
    #knowledge-base section,
    #knowledge-base .section {
       width: 100%;
       margin-left: 0px;
       float: none;
    }
}