header {
    display: flex;
    padding: 10px;
    border-bottom: 2px solid;
    nav {
        display: flex;
        margin-left: auto;
        margin-right: 0;
        ul {
            list-style: none;
            padding-left: 0;
            margin: 0;
            li {
                display: inline;
            }
        }
    }
}

main {
    max-width: 1200px;
    margin: auto;
    hgroup {
        h1 {
        margin-bottom: 0.3rem;
        }
        p {
            font-size: 1.5rem;
            margin-top: 0.3rem;
        }
    }
}

footer {
    padding: 0 20px;
    border-top: 2px solid;
    p {
        text-align: center;
    }
    ul {
        list-style: none;
        padding-left: 0;
        text-align: center;
        li {
            display: inline-flex;
        }
    }
}