html,
body {
  width: 480px;
  height: 320px;
  font-size: 25px;
  position: relative;
  background: url(check.png);
}
.area {
  border: 1px solid gray;
  background: rgb(39, 45, 103, .9);
  position: absolute;
  box-shadow: 5px 5px 20px black;
}