:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}body{margin:0;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}@media (prefers-color-scheme: light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}#root{max-width:620px;margin:0 auto;text-align:center;display:flex;flex-direction:column;align-items:center;height:100vh}.card{padding:2em}.note{color:#888}.heading{font-size:3rem}.square{width:50px;height:50px}.square-Empty{background-color:#d3d3d3}.square-Red{background-color:#f06d6b}.square-Blue{background-color:#009fdf}.highlighted-square-Empty{border:5px solid slategrey}.highlighted-square-Red{border:5px solid #f06d6b}.highlighted-square-Blue{border:5px solid #009fdf}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background-color:#00000080;display:flex;justify-content:center;align-items:center;z-index:1000}.modal-content{background-color:#fff;padding:20px;border-radius:8px;box-shadow:0 4px 6px #0000001a;text-align:center;min-width:250px}.modal-content p{margin-bottom:20px;color:#333}.modal-buttons{display:flex;justify-content:space-around}.modal-buttons button{padding:10px 20px;border:none;border-radius:4px;cursor:pointer;font-weight:700}.modal-buttons button:first-of-type{background-color:#007bff;color:#fff}.modal-buttons button:last-of-type{background-color:#6c757d;color:#fff}.modal-buttons button:hover{opacity:.9}.board{display:grid;border:2px lightgray;gap:2px;margin:0 auto}.board-notification{height:4em;overflow-wrap:break-word;margin-bottom:10px}.board-buttons{display:flex;justify-content:center;gap:10px;margin-top:10px;margin-bottom:10px}