Content does not adjust to window size

You say the following regarding your new website builder: "No mater what size monitor or screen someone views your site on, the content and page will conform to fit their screen. Whether they use a desktop, laptop, phone or tablet they get the best experience on your site". However, my new website under development is always cutoff when the screen is small. I though the content was going to fit the size of the screen automatically.  Check for example any page except HOME and ABOUT (which I narrowed them purposely) on felix-alba-juez.homesteadcloud.com. Please advise