body {
    background: #434343;
}

aside {
    background: url(assets/notebook.jpg);
    width: fit-content;
}

main {
    overflow: hidden;
    max-width: 21cm;
    aspect-ratio: 1 / 1.414;
    box-shadow: 5px 5px 5px #00000085;
    margin: 50px auto;
    position: relative;
}

@page {
    size: portrait;
    margin: 0;
}

@media print {
    body main {
        margin: 0 !important;
    }

    aside, footer, nav {
        display: none;
    }
}