:root {
    --main-bg: #f8f4ff;
    --main-bg-light: #fcfaff;
}
html {
    background-color: var(--main-bg);
    background-image: repeating-linear-gradient(-45deg, var(--main-bg-light) 0 20px, var(--main-bg) 20px 40px);
    font-family: sans-serif;
}

body {
    position: relative;
    margin: 0 auto;
    max-width: 40rem;
    line-height: 1.6;
}

h1, h2, h3, h4 { font-family: serif; font-style: italic; }
h1 { font-size: 3rem; margin: .5em 0; }
h2 { font-size: 1.5rem; margin: 1.5em 0 .5em 0; }
h3 { font-size: 1.25rem; margin: 1.5em 0 .5em 0; }
h4 { font-size: 1.125rem; margin: 1.5em 0 .5em 0; }

main {
    background: white;
    box-shadow: 0 0 .5rem rgba(0,0,0,.1);
    border-radius: .5rem;
    padding: 2rem;
}

main > p {
    margin-top: 0;
}

header, footer { padding: 1rem; }
a {
    color: black;
    text-decoration: underline;
}
a:visited {
    color: #333;
}

header h1 {
    font-style: italic;
    text-align: center;
    margin: 0;
}
header nav { float: right; font-size: 2rem; }
header:after {
    content: '';
    display: block;
    clear: both;
}
footer {
    margin-top: .5rem;
    font-size: small;
    text-align: right;
}

ul {
    list-style-type: disc;
    padding-left: 1em;
}
li { margin-bottom: 1em; }