.modalDialog {
  position: fixed;
  font-family: Arial, Helvetica, sans-serif;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background: rgba(0,0,0,0.8);
  z-index: 1500;
  opacity:0;
  -webkit-transition: opacity 400ms ease-in;
  -moz-transition: opacity 400ms ease-in;
  transition: opacity 400ms ease-in;
  pointer-events: none;
}

.modalDialog:target {
  opacity:1;
  pointer-events: auto;
}

.modalDialog > div {
  width: 600px;
  position: relative;
  margin: 10% auto;
  padding: 5px 20px 13px 20px;
  border-radius: 10px;
  background: #fff;
  background: -moz-linear-gradient(#fff, #999);
  background: -webkit-linear-gradient(#fff, #999);
  background: -o-linear-gradient(#fff, #999);
}

.close {
  background: #606061;
  color: #FFFFFF;
  line-height: 20px;
  position: absolute;
  right: -12px;
  text-align: center;
  font-size: 15px;
  top: -12px;
  width: 20px;
  text-decoration: none;
  -webkit-border-radius: 12px;
  -moz-border-radius: 12px;
  border-radius: 12px;
  -moz-box-shadow: 1px 1px 3px #000;
  -webkit-box-shadow: 1px 1px 3px #000;
  box-shadow: 1px 1px 3px #000;
}

.close:hover { background: #FFFFFF; }

@media (max-width: 539px) {
  .modalDialog > div {
      width: 80%;
  }
}

@media (min-width: 540px) and (max-width: 620px) {
  .modalDialog > div {
      width: 70%;
  }
}