body {
    margin: 0;
}

header, nav, main, section, article, aside, footer {
    outline: 3px dotted black;
    margin: 10px;
    padding: 15px;
}


main {
    display: flex;
}

section {
    flex: 2;
}

aside {
    flex: 1;
}


header { 
    background-color: #ffe0b2;
 }

nav {
     background-color: #b2ebf2; 
    }
section { 
    background-color: #c8e6c9;
 }
article { 
    background-color: #dcedc8; 
}
aside { 
    background-color: #f0f4c3; 
}
footer { 
    background-color: #d1c4e9; 
}