text: _('toStr each filter');
  
  var styleList = [],
      scale = 1;
  
  function exports(css)
  {
      css = toStr(css);
  
      for (var i = 0, len = styleList.length; i < len; i++)
      {
          if (styleList[i].css === css) return;
      }
  
      let container = exports.container || document.head,
          el = document.createElement('style');
  
      el.type = 'text/css';
      container.appendChild(el);
      
      let style = {css, el, container};
      resetStyle(style);
      styleList.push(style);
  
      return style;
  }
  
  exports.setScale = function (s) 
  {
      scale = s;
      each(styleList, style => resetStyle(style));
  };
  
  exports.clear = function () 
  {
      each(styleList, ({container, el}) => container.removeChild(el));
      styleList = [];
  };
  
  exports.remove = function (style) 
  {
      styleList = filter(styleList, s => s !== style);
  
      style.container.removeChild(style.el);
  };
  
  function resetStyle({css, el}) 
  {
      el.innerText = css.replace(/(\d+)px/g, ($0, $1) => (+$1 * scale) + 'px');
  }
  