: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}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}}.app-container{display:flex;justify-content:center;align-items:center;height:100vh;width:100vw;background-color:#f8f8f8;margin:0;overflow:hidden}.start-menu{text-align:center}.checkbox-label{display:block;margin-bottom:10px;font-size:1.2em;font-weight:400}.start-button{padding:10px 20px;font-size:16px;background-color:#007bff;color:#fff;border:none;border-radius:5px;cursor:pointer;transition:background-color .3s ease}.start-button:hover{background-color:#0056b3}.app-header{position:fixed;top:0;left:0;width:100%;box-sizing:border-box;background-color:#222;color:#fff;padding:10px 20px;display:flex;justify-content:space-between;align-items:center;z-index:1000;box-shadow:0 2px 4px #0000001a}.app-title{margin:0;font-size:1.5em}.exit-button{background-color:#ff4d4d;color:#fff;border:none;border-radius:5px;padding:5px 10px;cursor:pointer;font-size:1em;transition:background-color .3s ease}.exit-button:hover{background-color:#c00}.quantumness-selector{margin-top:15px;margin-bottom:20px;font-size:1em}.quantumness-selector label{margin-right:10px}.quantumness-selector select{padding:5px;font-size:1em;border-radius:5px;border:1px solid #ccc}.game-over-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background-color:#000000b3;display:flex;justify-content:center;align-items:center;z-index:2000}.game-over-content{background-color:#fff;padding:20px;border-radius:10px;text-align:center;box-shadow:0 4px 8px #0003}.game-over-content h2{margin-bottom:20px;font-size:1.8em}.restart-button{margin-right:10px;background-color:#007bff;color:#fff;border:none;border-radius:5px;padding:10px 20px;cursor:pointer;font-size:1em;transition:background-color .3s ease}.restart-button:hover{background-color:#0056b3}.board{display:grid;grid-template-columns:repeat(8,1fr);grid-template-rows:repeat(8,1fr);aspect-ratio:1 / 1;width:90vw;max-width:400px;border:2px solid black}.square{width:100%;height:100%;display:flex;align-items:center;justify-content:center}.square.light{background-color:#f0d9b5}.square.dark{background-color:#b58863}.piece{width:70%;height:70%;border-radius:50%;box-shadow:0 2px 5px #00000080;display:flex;justify-content:center;align-items:center}.piece-white{background-color:#fff;color:#000}.piece-black{background-color:#000;color:#fff}.crowned-piece{background-size:cover;background-position:center;background-image:url(/crown.png)}.moveable{cursor:pointer;position:relative;box-shadow:0 0 5px #0f0c,0 0 8px #0f09;animation:pulse 1.5s infinite;transform:scale(1.1)}.moveable:hover{transform:scale(1.2);box-shadow:0 0 8px #0f0,0 0 12px #0f0c}.highlight-square{position:relative;background-color:#0f03;border:2px dashed #00ff00;box-shadow:0 0 10px #0f0c;box-sizing:border-box}.split-icon{width:100%}.rotate{transform:rotate(90deg)}.change-text{font-size:small}