body {
    background-color: #ffc;
    color: #500;
    font-family: verdana;
    margin: 0;
}

header {
    background-color: #500;
    color: #ffc;
    text-align: center;
    padding: 16px;
}

nav {
    text-align: center;
    padding: 10px;
}

nav a {
    text-decoration: none;
    text-transform: uppercase;
    padding: 6px 12px;
    margin: 0 5px;
    color: #500;
    font-weight: bold;
}

main {
    border: 2px solid #000;
    margin: 16px;
    padding: 16px;
}

footer {
    background-color: #999;
    color: #000;
    text-align: center;
    padding: 12px;
}

img {
    max-width: 100%;
    height: auto;
}

@media (max-width: 800px) {

    h1 {
        font-size: 28px;
    }

    nav a {
        display: block;
        padding: 8px;
        font-size: 18px;
    }

    main {
        padding: 10px;
    }

}