page {
    background: white;
    display: block;
    margin: 0 auto;
    margin-bottom: 0.5cm;
    box-shadow: 0 .5cm .5cm rgba(18, 38, 63, 0.2);
}
page[size="A4"] {  
    width: 21cm;
    height: 29.7cm; 
}
page[size="A4"][layout="landscape"] {
    width: 29.7cm;
    height: 21cm;  
}
page[size="A3"] {
    width: 29.7cm;
    height: 42cm;
}
page[size="A3"][layout="landscape"] {
    width: 42cm;
    height: 29.7cm;  
}
page[size="A5"] {
    width: 14.8cm;
    height: 21cm;
}
page[size="A5"][layout="landscape"] {
    width: 21cm;
    height: 14.8cm;  
}
@media print {
    body, page {
        background: white;
        margin: 0!important;
        box-shadow: 0!important;
    }
}