I am trying to modify what I believe is the Gift Certificate Que Language file. The e-mail being sent from my store has this text minus the red text:

Code:
You recently purchased a Gift Certificate from our online store.
For security reasons this was not made immediately available to you. However, this amount has now been released. 
You may now visit our store and send the value of the Gift Certificate via email to someone else, or use it yourself. 
To send the gift certificate to someone else login to your account, select Account, then scroll to the bottom and where it says Gift Certificate Account click Send A Gift Certificate
The Gift Certificate(s) you purchased are worth $0.03
$0.03
I want to add the text in red and also increase the font size (the font in the e-mail is very small maybe 9px or small). I looked in developers toolkit but I did not get any language files or any other results. Where can I add this red font, and how can I increase the font size on this e-mail?