body { background-color:white; color: blue; width: 100%; height: 157px; padding:15px; } body { background-color:white; color: blue; width: 100%; height: 160px; padding:25px; } div { background-color: white; width: 150px; border: 25px blue; padding: 15px; margin: 15px; } header{ text-align: center; background-color: grey; color:yellow; padding: 20px; } footer{ text-align: center; background-color: grey; color:yellow; padding: 20px; } { padding: 5px border: 5px margin: 5px border box/box-sizing }