CSS styling all off

Hi, my css styles are all off: http://www.sayenkodesign.com/invoice/?invoice_id=f1761caf787dbb13421c2c914b6be2eb

How can I style it like the rest of my website, the cform style I have for the forms and have a clean table like this website: http://jadewebsitedesign.com/invoice/?invoice_id=55f63cb35cddeeffe18d7ce8fff45f43

thanks for the help. Can’t figure out how to style it.

https://wordpress.org/plugins/wp-invoice/