@keyframes pulse{0%{transform:scale(1);opacity:1}50%{transform:scale(1.1);opacity:.5}to{transform:scale(1);opacity:1}}.circle-container{display:grid;place-items:center}.circle{position:absolute;border-radius:50%}.infinite-pulse{animation:pulse 2s infinite}video{width:100vw;height:100vh;position:fixed;left:0;top:0;z-index:-1}