.teacher-layout{box-sizing:border-box}.mobile-menu{position:fixed;top:0;left:0;width:220px;height:100vh;background:#fff;z-index:3000;transform:translateX(-100%);transition:.3s}.mobile-menu.open{transform:translateX(0)}.menu-btn{position:fixed;top:100px;left:15px;z-index:3001;font-size:20px;cursor:pointer}