body {
margin:0;
}
h1 {
text-align:center;
border-bottom: 2px solid gray;
margin:0;
padding:20px;
}
ol {
border-right: 2px solid gray;
width:100px;
margin:0;
padding:20px;
text-decoration-line: none;
}
#wrapper {
width : 1200px;
margin:0 auto;
border: 1px solid #000;
}
#grid {
display: grid;
grid-template-columns: 150px 1fr;
  }
#grid ol {
    font-size: 20px;
    padding: 40px;
  }
#grid #article {
   padding-left:  120px;
  }
  @media(max-width:800px){
   #grid{
     display: block;
   }
   ol{
     border-right:none;
   }
   h1 {
     border-bottom:none;
   }
 }