.modalDialog {
  bottom: 0px;
  background-color: rgba(200, 200, 200, 0.3);
  left: 0px;
  margin: 0 auto;
  position: absolute;
  right: 0px;
  text-align: center;
  top: 0px;
  z-index: 100;
}
.modalDialog:before {
  content: "";
  display: inline-block;
  height: 100%;
  vertical-align: middle;
}

.content {
  background-color: #111111;
  border: 1px solid #303030;
  border-radius: 7px;
  color: #c5c5c5;
  display: inline-block;
  padding: 10px;
  text-align: left;
  vertical-align: middle;
}

.header {
  font-size: 24px;
  margin-bottom: 10px;
}