@page {
    size: A4 portrait;
    margin: 1cm 1cm;
}
html,
body {
    padding: 0;
    margin: 0;
}
.page-break {
    page-break-before: always;
}
.avoid-break {
    page-break-inside: avoid;
}
main > ul > li .dogs ul li .dog_image {
    padding-bottom: 70%;
    background-size: contain;
}
.litters main > ul > li {
    margin-bottom: 10px;
}