How do you make something not look clickable?
You can use a lighter font so it's distinct from the actual content. Here's a version w/ lighter and tucked completely into the corner, and one where you don't put any borders, just a simple gray text. These are great options. I recommend number 1, as it is the most obvious, and does not looks like a button or a link.
How do I make text Unclickable in CSS?
In the CSS file, simply utilize the “user-select” property with the value “none”. This will make the text unselectable respectively.