body{margin:0;font-family:sans-serif;background-color:#000;color:#fff}@keyframes blink{0%,to{opacity:1}50%{opacity:.5}}.blink{animation:blink 1s ease-in-out infinite;will-change:opacity}@keyframes screen-background-blink{0%,to{filter:brightness(1)}50%{filter:brightness(.45)}}.screen-background-blink{animation:screen-background-blink 1s ease-in-out infinite;will-change:filter}