.demo-overlay{position:fixed;top:0;right:0;width:200px;height:200px;background:rgba(255,47,0,.7);clip-path:polygon(100% 0,0 0,100% 100%);z-index:9999}.demo-label{position:absolute;top:20px;right:20px;color:#fff;font-size:24px;font-weight:700;transform:rotate(45deg)}