body{
     background:lightgray;
   }
   #main{
   /* position:absolute; */
   margin:3% auto;
   top:10%;
   left:23%;
   width:40%;
   background:teal;
   text-align:center;
   padding:6%;
     
   }
   #bin,#dec{
   width:50%;
   margin:1%;
   height:30px;
   font-size:16px;
   font-weight:bold;
   }
   .btn {
  
  width:23%;
  padding:15px;
  margin:10px;
  background:#30160e;
  border:1px solid #30160e;
  color:whitesmoke;
  }
  .lbl {
  
  font-size:16px;
  font-weight:bold;
  font-family:ariel,sans-serif;
  padding:15px;
  }

  .article {
    padding: 0 20%;
  }