:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:dark;color:#ffffffde;background-color:#242424}body{margin:0;padding:0;overflow:hidden;width:100vw;height:100vh}canvas{display:block;position:absolute;top:0;left:0;width:100%;height:100%;z-index:1}#uiLayer{position:absolute;top:0;left:0;width:100%;height:100%;z-index:10;pointer-events:none}#uiLayer>*{pointer-events:auto}.modal{position:fixed;top:0;left:0;width:100%;height:100%;background:#000000e6;display:flex;justify-content:center;align-items:center;z-index:100}.modal-content{background:#333;padding:2rem;border-radius:8px;max-width:500px;text-align:center;border:2px solid #ff4444}.modal-content h2{color:#f44;margin-top:0}.danger-btn{background-color:#f44;color:#fff;border:none;padding:10px 20px;font-size:1.1em;border-radius:4px;cursor:pointer;margin-top:1rem}.danger-btn:hover{background-color:#c00}#controls{position:absolute;top:20px;left:50%;transform:translate(-50%);background:#000000b3;padding:1rem;border-radius:8px;display:flex;flex-direction:column;gap:10px;text-align:center;transition:opacity .3s ease,transform .3s ease;transform-origin:top center;width:300px}.controls-hidden{opacity:0;transform:translate(-50%) translateY(-100%);pointer-events:none}.ui-toggle-btn{position:absolute;top:20px;right:20px;z-index:20;background:#00000080;color:#fff;border:1px solid #555;border-radius:4px;padding:8px 12px;cursor:pointer;transition:background .2s}.ui-toggle-btn:hover{background:#000c}.hidden{display:none!important}.app-title{margin:0;line-height:1;font-size:1.5em;font-weight:700;letter-spacing:1px;color:#fff}.app-version{font-size:.8em;color:#888;margin-bottom:15px;border-bottom:1px solid #555;padding-bottom:10px}.stats{font-size:1.2em;font-family:monospace;margin-bottom:10px}.control-group{margin-bottom:15px;width:100%}.control-group label{display:block;margin-bottom:5px}.control-group input[type=range]{width:100%;cursor:pointer}.buttons{display:flex;gap:10px;justify-content:center}button{padding:8px 16px;font-size:1em;cursor:pointer}button:disabled{opacity:.5;cursor:not-allowed}