body{
 background-repeat: no-repeat;
 background-attachment: fixed;
 background-position:right top;
 background-size:cover;
 background-image:url("grulla_31.jpg");
}

#ihead{
 width:100%;
 height:100vh;
}

#courtain{ background-color:black; background-size:cover; }

article.mod{
  position:fixed;
  right:10px;
  z-index:0;
  max-width:500px;
  padding:5px 5%;
  min-width:250px;
}


p.mod{
  color:black;
  font-weight:bold;
  font-size:1.5em;
  background-color:rgba(145,145,145,0.2);
  }