Not installed MAIN class .container that specifies a fixed width.
Inside .container has a child block with a class advantage, it occupies the whole width of the parent, and below there are blocks with the class .index-content, and for some reason they don't take up the whole width of the parent.
Want to achieve the effect below .index-the content spans the entire width of the parent, and the blocks inside it - index-content-left was pressed to the left, and index-content-right to the right, and the remaining space would be the distance between the blocks. But now they just stick together and not take the whole width of the parent.
Interested in more – why is this behavior, not how to fix it.