This is a stylesheet that can be used to make a Redmine wiki look like the Byword previews. It uses Byword.css for Marked and provides additions to make the wiki usable.
You will need a browser extension that allows you to specify custom styles for specific pages. I use the User CSS extension for Safari. For Chrome or Firefox try Stylish from userstyles.org.
Using your extension create a new style and copy redmine_byword_style.css into the style definition. Now specify which URLs the style should apply to:
- https://{Root Redmine URL}/*/wiki
- https://{Root Redmine URL}/*/wiki/
- https://{Root Redmine URL}//wiki/
Save your new style and reload your wiki.