:root{font-family:Inter,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}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;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}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media (prefers-color-scheme: light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}html,body{margin:0;padding:0;height:100%}body{font-family:Arial,sans-serif;background-color:#f0f0f0}.page-container{display:flex;flex-direction:column;align-items:center;justify-content:center;width:100vw;height:100vh}.solvable-label{margin-top:10px}.controls{margin-top:20px}.puzzle-container{position:relative;display:flex;justify-content:center;align-items:center}.grid-wrapper{position:relative}.column-hints-container{position:absolute;bottom:100%;left:50%;transform:translate(-50%);display:grid;grid-template-columns:repeat(15,30px);text-align:center}.column-hint{display:flex;flex-direction:column;justify-content:flex-end;align-items:center;font-size:12px;padding:4px}.row-hints-container{position:absolute;top:50%;right:100%;transform:translateY(-50%);display:grid;grid-template-rows:repeat(15,30px);text-align:right}.row-hint{display:flex;flex-direction:row;justify-content:flex-end;align-items:center;width:auto;font-size:12px;padding:4px;gap:5px}.grid-container{display:grid;grid-template-columns:repeat(15,30px);grid-template-rows:repeat(15,30px);gap:0}.grid-cell{width:30px;height:30px;border:1px solid #ccc;box-sizing:border-box}.border-bottom-thick{border-bottom:2px solid #000}.border-right-thick{border-right:2px solid #000}.top-left-corner{display:none}.controls{display:flex;gap:1rem;align-items:center}.success-message{position:absolute;top:20px;left:50%;transform:translate(-50%);background:#4caf50;color:#fff;padding:10px 20px;border-radius:5px;font-weight:700;z-index:9999}.error-message{position:absolute;top:60px;left:50%;transform:translate(-50%);background:#f44336;color:#fff;padding:10px 20px;border-radius:5px;font-weight:700;z-index:9999}.info-text{margin-top:20px;background:#f9f9f9;border:1px solid #ddd;border-radius:8px;padding:10px 15px;max-width:300px;text-align:left;font-size:14px;box-shadow:0 2px 5px #0000001a}.info-text p{margin:0 0 5px;font-weight:700;font-size:15px}.info-text ul{margin:0;padding-left:20px}.info-text li{list-style:disc;margin-bottom:5px}