:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif}.field{position:relative;margin:0 auto;width:90vmin;aspect-ratio:1;background-image:url(/field-bg.png);display:grid;grid-template-columns:repeat(19,1fr);grid-template-rows:repeat(19,1fr);background-repeat:no-repeat;background-size:102%;background-position:center}.cell{display:flex;justify-content:center;align-items:center;padding:0;border:0;border-radius:50%;background-color:transparent}.black{background-color:#000;background-image:linear-gradient(45deg,#000,#333)}.white{background-color:#fff;background-image:linear-gradient(45deg,#fff,#ccc)}.last{border:2px solid red}