body {
    font-family:'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
    font-size: 16px;
}

header {
    h1 {
        text-align: center;
    }
}

main {
    margin: 0 1rem;
}

article {
    max-width: 600px;
    margin: auto;
}

aside button {
    position: absolute;
    right: 0;
    top: 0;
    margin: 2rem 2rem;
    padding: .5rem;

    anchor-name: --button;
}

aside div {
    position: fixed;
    width: 12rem;
    height: auto;
    margin: .5rem 0 0 0;
    position-area: span-left bottom;
}

aside div {
    h2 {
        font-size: 1.1rem;
    }
    p, label {
        font-size: .8rem;
    }
}

.feedback {
    position: absolute;
    left: -9999px;
}