Why does Gulp open a browser with a different width (see photo)?

Question

Layout

So, the bottom line is this: I set up Gulp and started to typeset (it’s convenient and you don’t have to refresh the page all the time)
But when I opened the html file in the browser, it turned out that the width became smaller and, accordingly, the objects are not as I want.
Attention question!! What is wrong? What and where should be changed to fix this
PS: I used a reset in css, opened everything in the same browser
1) GULP: https://wampi.ru/image/x80mfE (1412px)
2) HTML file: https:// wampi.ru/image/x80nC7 (1270px)

Answer 1

Ummm .... I did not understand anything. Different scale? Customize it via ctrl +/-