body {
  /*position: relative;*/
}

#popdim {
  background-color: #3c4043;
  opacity: 0.8;
  filter: alpha(opacity=80);
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  display:none;
}

#pop {
  width: 100%;
  display:none;
  position: absolute;
  top: 0;
  left: 0;
  transition: all .2s ease-in-out;
}

#popstyle {
  background-color: #fff;
  border: 5px solid #79b;
  padding: 10px;
  text-align: center;
}

@media (min-width: 769px) {

  #pop {
    top: 30px;
    left: 50%;
    margin-left: -375px;
    width: 750px;
  }

}