#root{margin:0 auto;padding:1rem}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}#video-grid{display:grid;grid-template-columns:repeat(auto-fill,300px);grid-auto-rows:300px}video::-webkit-media-controls{display:none!important}.class-room{display:flex;justify-content:space-between}