:root {
    font-family: "Times New Roman", serif;
    line-height: 1;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
}

.m1, .m2, .m3 {
    height: 0;
    width: 1cm;
    position: fixed;
    left: 0;
    border-top: 1pt solid black;
}

.m1 {top: 105mm;}
.m2 {top: 148.5mm;}
.m3 {top: 210mm;}

header {
    height: 45mm;
    padding: 5mm;
    position: absolute;
    top: -25mm;
    left: 0;
    right: 0;
    text-align: center;
}
.spacing {height: 20mm;}
.info-wrapper {
    width: 100%;
    height:45mm;
    margin: 0 0 8.46mm 0;
    position: relative;
}

.address-wrapper {
    height: 45mm;
    width: 85mm;
    margin: 0;
    padding: 5mm;
    position: absolute;
    left: 20mm;
    top: 0;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
}

.address-wrapper .sender {
    flex: 17.7mm 1 1;
    font-size: 8pt;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding-bottom: 2mm;
}

address {
    flex: 27.3mm 1 1;
    white-space: pre-line;
    font-size: 12pt;
    font-style: normal;
}

aside {
    height: 40mm;
    width: 75mm;
    margin: 0;
    position: absolute;
    left: 125mm;
    top: 5mm;
}

main {
    margin: 8.46mm 20mm 4.23mm 25mm;
}

main :first-child {
    margin-top: 0;
}

main h1, main p {
    font-size: 12pt;
    margin: 1em 0;
    text-align: justify;
    widows: 3;
    orphans: 3;
}

main .date {
    margin-bottom: 2em;
    text-align: right;
}

main h1 {
    margin-bottom: 2em;
}

.footer-wrapper {
    padding: 0 20mm 0 25mm;
    position: running(page-footer);
    bottom: 0;
    left: 0;
    right: 0;
}

.pre-footer {
    margin: 4.23mm 0;
    font-size: 10pt;
    display: flex;
}

.pre-footer .date, .pre-footer .page {
    flex: 100px 1 1;
}

.pre-footer .date {text-align: left;}
.pre-footer .page {text-align: right;}
.page::after {
    content: "Seite 1 von 1";
}

footer {
    font-size: 10pt;
    border-top: 1pt solid black;
    height: 25mm;
    padding-top: 1mm;
    text-align: center;
}

table {
    width: 100%;
    border-collapse: collapse;
}

@page {
    size: A4;
    margin: 25mm 0 35mm 0;
    @bottom-center {
        content: element(page-footer);
    }
}

@media screen {
    body, header, .footer-wrapper {
        width: 210mm;
    }
    header, .address-wrapper, aside, main {
        border: 1px solid lightgray;
    }
    .m1, .m2, .m3 {display: none;}
    header {top: 0;}
    .spacing {height: 45mm;}
    .main-wrapper {
        margin-bottom: 40mm;
    }
    .footer-wrapper {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background: white;
    }
}

@media print {
    .page::after {
        content: "Seite " counter(page) " von " counter(pages);
    }
    .footer-wrapper {
        display: none;
    }
}