body {
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background-color: #f0f0f0;
}

.box {
  width: 11in;
  height: 11in;
  background-color: #3498db;
  border: 2px solid #2980b9;
}