Page is not scalling when resizing!

I checked the link you gave in 4 browsers.
In all it worked well. Only in IE it showed a little problem in the placement of menu-items.

Mak sure you installed the latest version of the browser.

Press <ctrl-F5> or refresh the browser cache;
https://www.wikihow.com/Clear-Your-Browser%27s-Cache

Thank you, Ginfo for your answer. I really appreciate this, because I almost cried after seeing this.

https://dl.dropboxusercontent.com/u/34906083/site2.PNG
This is what I mean. I checked this in IE and Chrome as well and the same issue. Widget bar is going down below post page. The question is – why scroll bar is not appearing? I asked two more persons to check it and they reported me the same issue

Website looks great (at least for my skills. I had no idea about php and css 3 weeks ago and with this forum, tutorials I could create something like this, so I’m pretty proud ?? ) in full screen but after resizing the browser, everything is messing.

Where did these styles come from:

.widget-area {
width: 335px;
background-color: #090909;
position: relative;
left: 38px;
}

?

The “width” style is using a static measurement of pixels. Use a percentage like the theme originally did.

Thank you for your answer, Andrew
I’m afraid it did not solve the problem, rather made it more annoying. However still, with browser resizing, there is no scroll bar and everything is very small. How to prevent website from scalling?
https://dl.dropboxusercontent.com/u/34906083/scalling.PNG

Who built this site for you? You need to contact that person because there seems to be JavaScript disabling the scrollbar.

How to prevent website from scalling?

Just don’t use a mobile theme, especially Twenty Twelve which was primarily built for mobile phone usage. That’s the easiest option you have.

I created it on my own, learning css and php from basic as a hobby.

Hmm, any harder way? Changing the theme would be starting from scratch and this is what I would like to avoid :/

Have you tried deactivating plugins to explore whether you have any that disable the scrollbar?

Yeah, tried that 5 minutes ago. Nothing has changed. It looks like that twentytwelve theme doesnt have scrollbar for page and widget area. After resizing widgets are jumping below the post page

Test the following to see if this problem is related to the active theme, or not.

Install and actvate any other theme, deactivate the plugins and check if the resizing problem re-occurs. Don’t mind the look and feel, just check for the occurrance of the issue.

If the problem disappears, your problem is situated in the theme.

I would try to save any changes I made to the CSS into notepad, delete the theme then reinstall it. Then slowly add the changes back one at a time to pin down what’s causing the issue.

You might want to check on various errors:

https://jigsaw.w3.org/css-validator/validator?uri=http%3A%2F%2Fserwer1381464.home.pl%2Fautoinstalator%2Fwordpress%2F&profile=css3&usermedium=all&warning=1&vextwarning=&lang=en