Having issue with iframe cutting off, even when the block is large (AnRSVP)

AnRSVP has the ability to embed an RSVP block into your website but for some reason it's cutting off. I've tried adding the !important after the height but it still doesn't seem to work. I'm not experienced with this kind of stuff, can anyone help?

https://www.caddac.net/birthday

<iframe style="display:block;width:100%;height:100%;border:none;overflow:hidden;" src="https://dimitri-is-old.anrsvp.com/?embed=true"> </iframe>

1 hour ago, tuanphan said:

In your code, change height:100%

to

height:500px

I had to do 600px but that worked thank you! For some reason when I did 250 or 300 previously it made no change to the size.