Your template file may have a different name, so use the correct name in place of "template.css." Your HTML head section looks similar to this example: Save the HTML file.

How to Customize CSS in Blogspot. The Blogger Template Designer allows you to insert custom CSS code to change your blog's appearance. You can access the advanced settings of the Template Designer ...

By appending just a few lines of HTML and CSS code, researcher Louis Dion-Marcil showed how an external sender could hide the very warning from an email message.