3 questions

Hi,
first of all, thank you very much for having created Origamiez: I love it!
I have 3 questions, I hope you can help me on these.

1) Is there an easy way to change the link colour?
When you don’t pass a mouse on it, a link default colour is #444. I would like to change it to #E74C3C, the same as when the mouse is on it but without underline: I noticed that when I changed the CSS manually (not feasible with frequent updates), the bounce rate of my website was lower, so I suspect that with the deafault #444 colour people can’t discerne text from links, so they don’t click on them.

2) Is there a CSS class that allows me to understand when I’m on a desktop, tablet or mobile?
Like the hide_on_standard of this article.

3) Is it possible to add a widget space on top?
When the website is resized for mobile screens, the left or right widget bar goes on the bottom, after the articles. I use Polylang and I would like to place a language switch on top of them, right after the title. I made a mod myself, but I don’t like it because I can’t hide it on desktop (see previous question) and as soon as you release an update, it will be gone!

Thank you!

P.S. If you want to take a look, my website is https://chronocento.altervista.org