In the HTML source provided, the element #tfl has an inline style "display:block". Inline style will always override stylesheets styles…

Then, you have some options (while as you said you can't modify the html code nor using javascript):

• force display:none with !important rule (not recommended)
• put the div offscreen with theses rules :

#tfl { position: absolute; left: -9999px; }

In the HTML source provided, the element #tfl has an inline style "display:block". Inline style will always override stylesheets styles…

Then, you have some options (while as you said you can't modify the html code nor using javascript):

• force display:none with !important rule (not recommended)

• put the div offscreen with theses rules :

   #tfl {
       position: absolute;
       left: -9999px;
   }