body { 
    font-family: Arial, sans-serif; 
    margin: 0; 
    padding: 0; 
} 

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

nav { 
    background-color: #242424; 
    padding: 10px; 
} 

nav a { 
    color: #fff; 
    text-decoration: none; 
    padding: 10px; 
    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; 
} 

article { 
    margin-bottom: 20px; 
    padding: 10px 20px; 
    border: 1px solid rgb(145, 145, 145); 
    margin-right: 10px; 
} 

aside { 
    flex: 1; 
    background-color: #c9c9c9; 
    padding: 10px; 
} 

footer { 
    background-color: #242424; 
    color: #fff; 
    text-align: center; 
    position: fixed; 
    bottom: 0; 
    width: 100%; 
}