body{margin:0;padding:0;font-family:Ubuntu,sans-serif;background-color:#000;color:#000}.volume-slider::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:14px;height:14px;background:none;border-radius:50%;border:2px solid black;margin-top:-4px;transition:background .3s}.volume-slider::-moz-range-thumb{width:14px;height:14px;background:none;border-radius:50%;background-color:#fff;border:2px solid white}*{-webkit-tap-highlight-color:transparent;-webkit-focus-ring-color:transparent;outline:none}