Problem with sidebar in responsive

Hello,
I had a problem topic like the right bar site when viewing the phone was showing very narrow and very long. I sought help, but I did not find myself and sat down and found the problem. It is in the file style theme, which is why I changed this:

.woocommerce #sidebar {
???? width: 28%;
???? float: left;
???? margin-left: 2%;
???? min-width: 300px;
}

After adding the last line, things are fine and the site looks good.
I hope I have helped some with my problem.

Greetings