Working on my first web app wherein I’m using redmail with the Gmail user key to send an order summary email.
It works, but the css formatting is incorrect.
I’m gwnerating the summary content via

html=render_template("order_summary.html",list_of_dicts1,list_of_dicts2)

The issue seems to be that any of the class elements in my css (in the header of my html) which have display:flex or flex: are ignored or overridden by the Gmail page.

I noticed that all of my style tags are pre-pended with a string of numbers IE “.summary_div{” becomes “.276497461084763summary_div{”
Any suggestions as to how to correct this issue, or how I can alter my code to or approach to avoid this issue?
Many thx.