.controls-reference{background-color:#00000080;padding:10px;border-radius:5px;margin-top:15px;color:#aaa}.controls-reference h2{margin-top:0;margin-bottom:10px;font-size:1.1em;text-align:center;border-bottom:1px solid #555;padding-bottom:5px}.controls-reference ul{list-style:none;padding:0;margin:0;font-size:.9em}.controls-reference li{margin-bottom:5px;display:flex;justify-content:space-between;align-items:center}.controls-reference strong{color:#333;font-weight:700;min-width:100px;display:inline-block}.cube-placeholder{display:inline-block;width:20px;height:20px;margin-left:10px;vertical-align:middle;text-align:center;line-height:20px;font-size:.7em;color:#aaa}body{font-family:sans-serif;background-color:#f0f0f0;color:#333;margin:0;padding:20px 0 0;display:flex;justify-content:center;align-items:flex-start;min-height:100vh}.App{text-align:center;width:90%;max-width:1200px}h1{color:#444}.game-container{display:flex;flex-direction:row;justify-content:center;align-items:flex-start;margin-top:20px;gap:20px}.game-area{position:relative;width:70%;max-width:600px;height:80vh;max-height:800px;background-color:#222;border:1px solid #555;box-shadow:0 4px 8px #0003}.game-area>div:first-of-type{width:100%;height:100%}.ui-panel{width:25%;min-width:150px;display:flex;flex-direction:column;gap:15px;padding:15px;background-color:#e0e0e0;border-radius:5px;box-shadow:0 2px 4px #0000001a}.ui-panel h1{font-size:1.8em;margin-top:0;margin-bottom:10px;padding-bottom:8px;border-bottom:1px solid #ccc;color:#555}.info-display{font-size:1.2em;font-weight:700;padding:10px;background-color:#fff;border-radius:3px;text-align:left}.controls button{padding:10px 15px;font-size:1em;cursor:pointer;background-color:#4caf50;color:#fff;border:none;border-radius:4px;transition:background-color .2s}.controls button:hover{background-color:#45a049}.game-state-message{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);background-color:#000000b3;color:#fff;padding:15px 25px;border-radius:5px;font-size:1.5em;font-weight:700;z-index:10;pointer-events:none}@media (max-width: 768px){.game-container{flex-direction:column;align-items:center}.game-area{width:90%;max-width:500px;height:70vh}.ui-panel{width:90%;max-width:500px;margin-top:20px}}.next-piece-preview{background-color:#fff;padding:10px;border-radius:3px;text-align:center}.next-piece-preview h4{margin:0 0 5px;color:#555}.next-piece-preview>div{border-radius:3px;margin:0 auto;max-width:100px;height:100px}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}#root{width:100%;min-height:100vh}