Fix Margins - Rich Text

[ellacoker]

Hello,

Is anyone able to help me fix my margins on desktop version and centre everything on mobile version. Please see photos. Thank you in advance.

URL: https://www.samiyaskincare.com.au/pages/ingredients-glossary

Password: ellacoker

[LizHoang]

I see it's work right? 

[ellacoker]

I have worked out how to align it to the left but would still like to extend it all the way to the right. PLease see photo. Thank you.