The site looks good on my Mac using Firefox 184.108.40.206
As for the validation comments; "validating" a site and html code is still not the accepted "norm" for webmasters. Don't worry so much if the code isn't valid, what matters is how the site looks on a variety of browsers. I know, I know, some of you will say validating the site will make the site look the same on all browsers. Bunk. You still should test your code on a variety of browsers to be safe.