main content area of Clean Journal not responsive

I am having issues with the theme no longer being responsive. I have done some customization. I made the log SVG and installed a plugin that allows me to use SVG as logo. I tried deactivation that plugin and even changing the logo to a PNG. But neither resolved the issue. And, to be clear, it seems the main content area is what is not being responsive. The logo does resize in chrome, safari and firefox browsers and on my iPhone Can you advise why it is not behaving as a responsive website on mobile? https://www.launchitgrowit.com/