Customize your theme 
html{color:pink;background:#333}
div .code{background:#ccc;color:black}
html a{color:#fbf}html a::hover{background:transparent}
iframe{margin:8px !important}
@media screen and (max-device-width:500px) , screen and (orientation:portrait) {
#main-content { margin: 0 1.2em; }
#side-bar {display:none;}
}