A few questions about layout and self-study?

Question

css

1. I am building a site for a portfolio, everything is ok on a computer, but if you view the site from your phone, then there is a shift of the element in the block (the heading left). I understand how to fix this, but how can I trust the browser emulator in this case?
2. There are too many breakpoints on the site. For example, some element moved too close to the next one - I write new media for this. How can you fight it?
3. I study layout in my free time - lunch at work, in transport. Because of this, the learning process is quite slow. On the PC, there are downloaded courses from htmlacademy (I also uploaded them to smart), loftschool, a specialist, but due to lack of time, it is impossible to view at least a whole lesson at a time. What other training options are there?
4. There are certificates of completion of basic courses from sololearn (html, css, js, php). Could they be of some use? Or can they be rolled up with all the consequences?

Answer 1

1. I'm making up a site for a portfolio, everything is ok on a computer, but if you view the site from your phone, then there is a shift of the element in the block (the heading left). I understand how to fix this, but how can I trust the browser emulator in this case?

It sooooo rarely happens that the emulator is lying, from this I can pretend that you are doing something wrong.
I use my cell phone mainly for one final check.
For adaptability, I usually use breakpoints that are multiples of 100.
300-400, 400-500, 500-600, ... 1000-1200, 1200-1400... Everything can be put into this framework.
Some use 3 breakpoints altogether, 320+, 768+, 1024+. But I personally think it's wrong.
With the use of preprocessors, this work is greatly simplified.
I won't answer 3 or 4.

Answer 2

1. vryatli the emulator is lying
2. draw designs for certain points and from them already typeset.
3. buy a laptop and code on the road
4. I think everyone doesn't care about certificates.... in real work, there will be a deadline, if you pass it, it will work, if not, then no.