I have this 3-column Cutline Theme and I would like to make it responsive. Any tips or reference where I can work on it?
The only tip is to use relative units of measure like em, % or vw to define dimensions and positioning. Media queries might be appropriate, but without a link to the page anything else would just be a guess akin to guessing the color of a ribbon while wearing a blindfold.
I don't think you have enough posts yet to post links... 'cause there's no link there. Though the question is, is this some rubbish off the shelf template/theme? If so was it designed elastic and semi-fluid, the two steps you should have BEFORE making it responsive? Was it built with proper semantic markup, separation of presentation from content, and the dozen other things a page should have? If not, you're probably looking at throwing it out and starting over. Of course, having no clue what a "cutline" theme is, and a quick google-fu showing it to be some sort of turdpress crap... you're probably pretty far up **** creek as off the shelf templates are always the road to failure.
Frankly I am all clueless about this what you called "some rubbish off the shelf template/theme". All I know is this Cutline Theme was one of the earlier work by Chris Pearson. If I am not wrong, he is the creator of Thesis, and founder of DIYthemes.com. Yes, heed your advice. I'm getting a new theme soon.
Names that mean nothing to me -- but then sites like DIYThemes, ThemeForest and TemplateMonster are just scam artist whorehouses to me. They exist to dupe people into thinking that they can just grab some off the shelf template and have a website -- ripping off the ignorant, and most if not all the people making "templates" on such sites not knowing enough about HTML, CSS or accessibility to be designing jack **** for anyone. As evidenced by the fact they sleaze out cookie-cutter themes for turdpress. Don't know what "thesis" is, but that website you mentioned is in itself a laundry list of how not to build a website; not a particularly auspicious start. Gibberish use of numbered headings, paragraphs around non-paragraph elements, unclosed tags, closures for tags that aren't open... Do yourself a favor, forget that crap even exists.
kertoon, if you consider DIYthemes.com a good source for code, then please don't waste everyone's time trying to make that crap work. If you consider that kind of structurally and semantically defective code for use in site development then you are going to spend most of your time swimming in muck. If you are not prepared to invest enough time to get enough of a grasp of HTML/CSS to understand what kind turd sandwiches you are being served by third rate developers then hire someone to do the work for you, instead of adding more to the internet trash pile.