body.dark > header a#logo, .dark header a.logo{
    background: url("../../monitor/img/logo-monitor.svg") no-repeat center left;
    background-size: 10rem;
}

body > header a#logo, header a.logo {
    background: url("../../monitor/img/logo-monitor.svg") no-repeat center left;
    background-size: 10rem;
}