How to fix the side space on website in Squarespace ?

Site URL: https://www.takeoffbkk.com

Hello everyone,

Please help me figure out.

The problem is various audience had different resolution on their monitor.

So the website show is differently and I can not control the design of layout in the website.

As far as I think is I have to fix the space on the left and right of the website to make the space flexible enough and support various resolution of monitor.

But I can not find out where I can adjust this.

https://www.takeoffbkk.com

Thanks 

Add to Design > Custom CSS

.content-wrapper {
	max-width: 100% !important;
}