article {
        float: left;
        width: 70%;
    }
section:after { 
    content:"";
    display:table;
    clear:both;
}
article:after {
    content:"";
    display:table;
    clear:both;
}
p {
    padding: 5px;
    margin: 10px;
    border-radius: 5px;
    background-color: #627D98;
}
@media screen and (max-width: 600px) {
    article {
        width: 100%;
    }
}
nav .bottom-border {
    border-bottom: none;
}