header {
    background-color: yellow;
    border: 2px solid orange;
}  
nav {
    background-color: yellow;
    border: 2px solid rgb(255, 0, 0);
    width: 300  px;
    height: 300px;
    padding: 25px;
    margin: 20px;
} 
article {
    background-color: yellow;
    border: 2px solid orange;
}  
footer {
    background-color: yellow;
    border: 2px solid orange;
}  
.container {
    background-color: rgb(0, 195, 255);
    border: 2px solid rgb(255, 117, 232);
    padding: 20px;
    margin: auto;
}