Styling Forms Embedded in Website with iFrame

Styling Forms Embedded in Website with iFrame

Hi

I'd like to know if there is a reference guide somewhere that shows the options for editing form styles for forms embedded on website using an iFrame?

My current embed code is: 
<iframe height='600px' width='100%' frameborder='0' allowTransparency='true' scrolling='auto' src='https://creator.zohopublic.com/carlnathanbird1/sailing-school-bookings/form-embed/Website_Booking_Form/692JXDM3SRfakBMp1Ydat8HR53WmYG7jeEGhVPMvEydfsF8MT8kSjTVCHXybnfTOxrDCwaC8uvyTtaSZtjy8E6Zx1rQNupsAs3BE?Course_Page_input_through_URL=RYA Competent Crew'></iframe>

Thanks

Carl