body.layout {
    margin: 0;
    display: grid;
    grid-template-rows: 1fr auto 1fr;
    min-height: 100svh;
}

.layout>header {
    max-width: 20em;
    margin: auto auto 0 auto;
    width: 100%;
}

.layout>header h1 {
    margin-bottom: 0;
}

.layout>article {
    max-width: 20em;
    padding: 0;
    width: 100%;
}

.layout>footer {
    margin: auto auto 1em auto;
    text-align: center;
    color: #555;
}

.layout>footer>a {
    color: #555;
    font-size: 0.8em;
    text-decoration: none;
}

.layout>footer>a:hover {
    text-decoration: underline;
}