h1 {
  text-align: left;
  margin-bottom: 30px;
}

.elemento {
  width: 50%;
  margin: 20px auto;
  border-radius: 8px;
}

.sin-padding {
  background-color: #d8b9ff;
}

.con-padding {
  background-color: #87ceeb;
  padding: 0 200px; 
}

.con-padding-borderbox {
  background-color: #f08080;
  padding: 0 200px;
  box-sizing: border-box;
}