body{font-family:Gill Sans,Gill Sans MT,Calibri,Trebuchet MS,sans-serif}#headerBox{display:flex;justify-content:center}#grid{display:grid;gap:2px;width:75vw;height:75vw;max-width:75vh;max-height:75vh;margin:auto;background:#222}.cell{background:#eee;width:100%;aspect-ratio:1 / 1;border-radius:2px;cursor:pointer;transition:background .2s}.cell.alive{background:#4caf50}#controls{display:flex;justify-content:center;gap:1rem;margin:.5rem auto 2rem}#controls button{padding:.6em 1.2em;font-size:1rem;border:none;border-radius:5px;background:#415287;color:#fff;cursor:pointer;transition:background .2s,transform .1s}#controls button:hover{background:#1c3d62;transform:translateY(-2px) scale(1.05)}#speed-control{display:flex;justify-content:center;align-items:center;gap:.5rem;margin:2rem auto}#speed-control label{font-size:1rem;color:#333}#speedRange{direction:rtl}