header, footer {
      margin: 0.1em;
      padding: 0.1em;
      background-color: green;
      text-align: center;
    }  
    .row {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-between;
    }    
    nav {
    margin: 0.2em;
   /* max-height: 0.1em;
    /*border-color: red;
    border-style:  solid;
    padding: 1em; */ 
    width: 100%;
    background-color: lightgrey;
    text-align: center; 
    }
  
    .column {
    /*	flex-wrap: nowrap*/;
    margin: 0.2em;
    /*min-height: 8em;*/
    padding: 1em;
    width: 70%;
    background-color: lightgreen;; 
    
    }
    aside {
    margin: 0.2em;
    /*min-height: 8em; */
    padding: 1em;
    width: 22%;
    background-color: lightgreen;
    }
    a {
      text-decoration: none;
    }
    a:hover {
      color: red;
      
    }
    .show {
    	text-align: center;
    	padding: 10em;
    border-width: medium;
    border-style: double;
    
    
    }