Hi, This is a new page wich content has been filled using default WP Clasic Editor

This is a text composed using CLASIC EDITOR (the wordpress default editor) because some users will feel comfortabler writing on this user interface, since they care about information, no design.

The container block is

<div class=»main-content ro-container«>

and it has no CSS styles for margin, so it is displayed on the left of the browser,