.row {
  width: 100%;
  text-align: center; 
}

.block {
  width: 100px;
  display: inline-block;
}


.heading {

  width: 50%;
  border: 5px solid;
  position: absolute;
  padding: 10px;
  top: 5%;
  left: 50%;
 transform: translate(-50%, -50%);
  
}