#flash{text-align:center;position:fixed;left:0;right:0;top:-10rem;background-color:#000;color:#fff;padding:.5rem;animation:shift-up 3s ease-out 1;display:none;font-size:1.4rem;z-index:1000}@keyframes shift-up{0%{top:-10rem}10%{top:0}80%{top:0}100%{top:-10rem;display:none}}