I have realized an e-commerce with Magento and, at the same site, I realized some pages in HTML (pages like About, Philosophy, etc.). I have realized an html page for no-route too (404.html).
I would that when customer type an inexistent page (e.g. site.it/blablabla), my site redirects him to my custom 404 page (404.html) and not into a Magento cms. I realized this 404 html page outside Magento, in an html page. Is possibile set this setting?
Post Scriptum. I tried to copy my custom 404 page's code inside a Magento CMS but visual effect is very bad because the page is "like in a box".