.sidebar{width:300px;background-color:#2c3e50;color:#fff;padding:20px;top:0;left:0}.sidebar-title{font-size:20px;margin-bottom:20px;text-align:center}.sidebar-menu{list-style:none;padding:0}.sidebar-menu li{margin:10px 0}.sidebar-menu a{color:#fff;text-decoration:none;display:block;padding:10px;border-radius:5px;transition:background .3s}