body {
    background-color: #fff;
    color: #333;
    font: 1.2em / 1.5 Helvetica Neue, Helvetica, Arial, sans-serif;
    padding: 1em;
    margin: 0;
}

.parent {
  border: 2px solid #77A6B6;
  border-radius: .5em;
  width: 400px;
  height: 300px;


  display: flex;
  align-items: center;
  justify-content: center;
}

.child {
  background-color: #4D7298; 
  color: #fff;
  padding: .5em;
  width: 150px;
}