* {
    box-sizing: border-box;
}

#container {
    max-width: 100%;
    overflow-x: hidden;
}

.navbar ul {
    width: 100%;
}

@media (max-width: 899px) {

    .navbar ul {
        width: 100%;
    }
    .navbar ul li a {
        font-size: 1.2rem;
    }
    .navbar-nav .dropdown-menu {
        margin-bottom: 20px;
    }
    #container {
        grid-template-areas: 
        "header"
        "nav"
        "article"
        "footer";
        grid-template-rows: auto auto 1fr auto;
        grid-template-columns: 1fr;
    }
    #container article
    {
        display: grid;
        grid-area: article;
        grid-template-columns: 1fr;
        text-align: left;
    }
    .home-image {
        margin-top: 0;
        display: block;
        margin-left: auto;
        margin-right: auto;
    }
    .message {
        font-size: 1rem;
    }
    article,
    .article-text,
    section {
        margin-left: auto;
        margin-right: auto;
        width: 100%;
    }
}

@media (min-width: 600px) and (max-width: 767px) {
    article,
    .article-text,
    section {
        margin-left: auto;
        margin-right: auto;
        width: calc(100% - 24px);
        max-width: 100%;
    }

    .home-image {
        display: block;
        margin-left: auto;
        margin-right: auto;
        width: 70%;
        max-width: 100%;
    }
}