html[data-paper="a4"] .paper-preview{aspect-ratio:210 / 297}@media print{html[data-paper="a4"] .paper-preview{aspect-ratio:auto}}
html[data-paper="letter"] .paper-preview{aspect-ratio:215.9 / 279.4}@media print{html[data-paper="letter"] .paper-preview{aspect-ratio:auto}}