My first template, what's wrong with criticizing?

Question

css

About 2-3 weeks ago I saw a book on a tablet on JavaScript from a classmate and asked what and how, but I wanted to learn at least some language for a long time, but my hands did not reach, so he threw me 2 books "Strength CSS 3" and "bulletproof web design" and resource w3schools and I started reading a lot, and just 2 days ago I got tired of reading and got down to business , that 's what happened :) tell me what's wrong, fix it, send it, etc.

Answer 1

Fonts are connected incorrectly. Neither Firefox nor Safari has your Roboto. It makes sense to compress pictures, and not give them a size of megabytes. About the "up" button has already been said. I will add that it should be implemented the way it is done in VK or on Habré. It is better not to use Bootstrap, although many will obviously argue with me.

Answer 2

css is not a programming language.
And on a subject - all norms.

Answer 3

As a beginner, it's good. It catches the eye: emptiness around the title and button. About li has already been written.

Answer 4

main.css, media.css, fonts.css - it's better to merge
And when you finish typesetting, you need to cache the css file, it's done this way
for .js files, it also applies, it will work faster and Google loves this