/* RESET - Cancel some browser defaults to get consistent styling from one browser
     to another. */

html, body, div, span, h1, h2, h3, h4, h5, h6, p, ul, ol, li, dl, dt, dd, img, nav, fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td, a, article, aside, details, figcaption, figure, footer, header, hgroup, menu, section {
    margin: 0;
    padding: 0;
    border: 0;
}
 
* {
    box-sizing: border-box;
}


/* TYPOGRAPHY */

body {
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    color: #444444;
}


/* COLOUR SCHEME */

nav {
    background-color: darkgreen;
}


/* LAYOUT */

body, header, aside, footer, nav {
    padding: 1rem;
}

p {
    padding: 0 0 1rem 0;
}

body {
    display: grid;
    grid-template-columns: 1fr 40rem 1fr;
    width: 80rem;
    margin: 0 auto;
    border-left: 1px solid #ccc;
    border-right: 1px solid #ccc;
}

header {
    grid-column: 1 / span 3;
    text-align: center;
}

nav {
    grid-column: 1 / span 3;
    grid-row: 2;
}

#content {
    grid-column: 2;
    grid-row: 3;
}

aside {
    background-color: #efefef;
}

#aside_one {
    grid-column: 1;
    grid-row: 3;
    border-right: 1px solid #ccc;
}

#aside_two {
    grid-column: 3;
    grid-row: 3;
    border-left: 1px solid #ccc;
}

footer {
    grid-column: 1 / span 3;
    padding: 1em;
    background-color: #333;
    color: #fff;
}

/* NAVIGATION */

nav ul, footer {
    display: flex;
    justify-content: space-around;
    list-style-type: none;
}

nav li {
    padding: 0 1em;
}

nav a:hover, footer a:hover {
    border-bottom: 1px solid #fff; 
}

a {
    text-decoration: none;
}

nav a, footer a {
    color: #fff;
}






/* IMAGES */

img {
    width: 100%;
}

#content img {
    width: 33%;
}

#content img.left {
    float: left;
    clear: both;
    margin-right: 2em;
    margin-bottom: 2em;
}

#content img.right {
    float: right;
}

aside img {
    margin-bottom: 1em;
}