 @media screen and (min-width: 0px) and (max-width: 000px) {     #mobile-content { display: block; }  /* show it on small screens */ }  @media screen and (min-width: 000px)  {     #mobile-content { display: none; }   /* hide it elsewhere */ }  @media screen and (min-width: 0px) and (max-width: 000px) {     #desktop-content { display: none; }  /* hide iton small screens */ }  @media screen and (min-width: 000px) {     #desktop-content { display: block; }   /* show it elsewhere */ }