Spacing

<div class="container">
  <div class="centered-box">Centered Box</div>
</div>

.container {
  width: 400px;
  height: 200px;
  background-color: #f1c40f;
  border: 1px solid #e67e22;
  padding: 20px;
  text-align: center;
}

.centered-box {
  width: 150px;
  height: 150px;
  background-color: #3498db;
}


.container {
  width: 400px;
  height: 200px;
  background-color: #f1c40f;
  border: 1px solid #e67e22;
  padding: 20px;
  text-align: center;
}

.centered-box {
  width: 150px;
  height: 150px;
  background-color: #3498db;
  margin: auto;
}
