p.opis{
font-family:arial;
font-size:15px ;
letter-spacing:1px
}



.fade {
   opacity: 1;
   transition: opacity .5s ease-in-out;
   -moz-transition: opacity .5s ease-in-out;
   -webkit-transition: opacity .5s ease-in-out;
   }

   .fade:hover {
      opacity: 0;
      }s