.connection-module{display:flex}.left-menu{background-color:#d0d5cb;width:30%}.menu-item{cursor:pointer;padding:20px}.menu-item.active{border-bottom:1px solid #000}.menu-item.active,.right-content{background-color:#fff;border-top:1px solid #000}.right-content{width:70%}.content-item{display:none;padding:40px}.content-item.active{display:block}