:root {
    --dark-background-color: #333;
    --light-background-color: #f5f5f5;
    --dark-foreground-color: #000;
    --light-foreground-color: #fff;
    --grey-foreground-color: #ccc;
    --accent-color: #6D0509;
    --general-padding: 2em;
    --general-margin: 1em;
}
* {
    margin: 0;
    padding: 0;
    color: var(--dark-foreground-color);
    font-family: Arial, Helvetica, sans-serif;
}

*,*::before,*::after {
    box-sizing: border-box;
}


a {
    text-decoration: none;
}

a:hover {
    color: var(--accent-color);
    font-weight: bold;
}

div#container {
    display: flex;
    flex-direction: column;
}

div#content {
    display: inherit;
}

div#content section {
    display: inherit;
    flex-direction: row;
}

div#content section {
    width: 80vw;
    display: inherit;
    flex-direction: row;
    flex-wrap: wrap;
}

header {
    display: inherit;
    justify-content: center;
    align-items: center;
    height: 150px;
}

header h1 {
    font-family: Verdana, Geneva, Tahoma, sans-serif;
}

article {
    flex: 33.33%;
}

article div {
    margin: var(--general-margin);
    border: 1px solid var(--grey-foreground-color);
}

article div img {
    height: 500px;
    width: 100%;
    object-fit: cover;
    object-position: center;
}

nav {
    display: inherit;
    align-items: center;
    border-top: 1px solid var(--dark-foreground-color);
    border-bottom: 1px solid var(--dark-foreground-color);
    height: 40px;
}

nav ul {
    padding-left: calc(var(--general-padding));
}

nav li {
    display: inline-block;
    width: 5em;
    margin-right: var(--general-margin);
}

div#container {
    display: flex;
    flex-direction: column;
    margin: var(--general-margin);
}

aside {
    padding: var(--general-padding);
    padding-top: calc(var(--general-padding) *1.5);
}

footer {
    background-color: var(--dark-background-color);
    display: inherit;
    justify-content: center;
    align-items: center;
    height: 150px;
}

footer p {
    color: var(--light-foreground-color)
}

@media only screen and (max-width: 1200px) {
    div#content {
        flex-direction: column;
    }

    div#content section {
        width: 100vw;
        flex-direction: row;
    }

    div#content aside {
        width: 100vw;
        padding-top: var(--general-padding);
        padding-left: calc(var(--general-padding) / 2);
    }

    article {
        flex: 50%;
    }

    article div img {
        height: 360px;
    }
}

@media only screen and (max-width: 992px){
    div#content section {
        flex-direction: column;
    }
}