header { 
			background-color: #ffffff; 
			color: #000000; 
			text-align: center; 
		} 

		nav { 
			#background-color: #242424; 
			padding: 3px; 
		} 

		nav a { 
			text-decoration: none; 
			padding: 3px; 
			margin-right: 10px; 
			display: inline-block; 
		} 

		.container { 
			display: flex; 
			justify-content: space-between; 
			max-width: 95%; 
			margin: 0 auto; 
			padding: 20px; 
		} 

		article p { 
			text-align: justify; 
		} 

		main { 
			flex: 2; 
		} 
		table, th, td {
  			border: 1px solid black;
  
		}

		article { 
			margin-bottom: 10px; 
			padding: 2px 20px; 
			border: 1px solid black;
			background-color: #F4F3F3; 
			margin-left: 10px;
			margin-right: 10px; 
		} 

		aside { 
			flex: 1; 
			background-color: lightgrey; 
			padding: 10px; 
		} 

		footer {
		        opacity: 0.5;	
			background-color: black; 
			color: white; 
			text-align: center; 
			position: fixed; 
			bottom: 0; 
			width: 100%; 
		}