Configure Table Width in PDF-Export of blueprint template

Greetings,

i created a blueprint for some specific use case we have. The Blueprint should also include some kind of table, and one cell will include optional pictures. After a finished project the whole log book will be exported via Confluence PDF Export. (Think of a kind of log book. Each day is a own page, created via the blueprint.)

Since Confluence messes up every table in a exported PDF, i am using some custom CSS-Code to create a pleasant table:

tr td:nth-child(1) {
    width: 12% !important;
}

tr td:nth-child(2) {
    width: 12% !important;
}

tr td:nth-child(3) {
    width: 26% !important;
}

tr td:nth-child(4) {
    width: 50% !important;
}

tr th:nth-child(1) {
    width: 12% !important;
}

tr th:nth-child(2) {
    width: 12% !important;
}

tr th:nth-child(3) {
    width: 26% !important;
}

tr th:nth-child(4) {
    width: 50% !important;
}

.confluence-embedded-image {
    width: 100% !important;
    height: auto !important;
    display: block !important;
}

Now i may ask: Is there some way to include this css-code in the Blueprint-Plugin itself? So i don’t have to insert the custom CSS-Code on every Space the Blueprint get’s used in?

Thanks!

Greetings