main {
  background-color: lightblue;
  border: 2px solid;
  border-color: blue;
  color: #324199;
  padding: 0px, 20px, 20px, 20px;
  width: 60%;
  height: auto;
  margin-right: 20%;
  margin-left: 20%;}
  
  * {
  box-sizing: border-box;
  }   /* this is for dynamic sizing "border-box"*/
  
  .container-grid > div {
    background-color: pink;
    width: 70%;
    height: auto;
    margin-right: 10%;
    margin-left: 10%;
    
  }