*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:#16213e}::-webkit-scrollbar-thumb{background:#444;border-radius:3px}::-webkit-scrollbar-thumb:hover{background:#555}button:hover{opacity:.9}input[type=range]{accent-color:#4fc3f7}