How to expand the category pages as the front page

How to expand the category pages as the front page, because the category pages have a very large amount of blank space on the right. You can see it on my website http://techconnecto.com

Hello there,

Add this CSS code to Appearance > Customize > Additional CSS in your site dashboard.


.archive .content-area.col-md-8 {
  width: 100%;
}

Regards,
Kharis

can I use the same code for changing the width of my Contact Us, Privacy Policy, and About page. As you can see in my website (http://techconnecto.com), there is a huge blank space on all these pages.

Hello there,

For pages, you can enable the Full width template in the Page Attributes options in the page editing panel.

Regards,
Kharis