.reader-page .section.cover.autosize {
    height: 100vh;
}

.reader-page .unit.cover.autosize {
    height: 75vh;
}

.reader-page .chapter.cover.autosize {
    height: 50vh;
}

.reader-page .insert_section.cover.autosize {
    height: 90vh;
    height: -moz-calc(100vh - 20px);
    height: -webkit-calc(100vh - 20px);
    height: calc(100vh - 20px);
}

.reader-page .insert_unit.cover.autosize {
    height: 65vh;
    height: -moz-calc(75vh - 20px);
    height: -webkit-calc(75vh - 20px);
    height: calc(75vh - 20px);
}

.reader-page .insert_chapter.cover.autosize {
    height: 40vh;
    height: -moz-calc(50vh - 20px);
    height: -webkit-calc(50vh - 20px);
    height: calc(50vh - 20px);
}