I typed the code in Textastic on my iPad & it's perfect. But when I copy it into workspaces the CSS doesn't appear??

I've had to use my iPad to follow along with the course, so I've followed along by using Textastic to type the code for both the index.html & main.css files. When I open the index.html file straight from Textastic it appears exactly as it should & the CSS shows up. When I got back on my Mac, I opened Workspaces, created a new file named index.html & then copy & pasted the contents of the index.html I started in Textastic. I then opened created a new folder in workspaces and named it css, then I opened a new file and named it main.css. I then copy & pasted the main.css file I'd be working on in Textastic into the new Workspaces file. The CSS shows up fine in Textastic but it's completely missing in Workspaces. My document tree is exactly the same as are the contents of the index.html & main.css files in both Textastic & Workplaces. So why when my code is identical, is my CSS showing up when using Textastic but missing completely when using Workspaces??? I"m thinking I'm going to have to go back & start again in Workspaces to get the CSS to work so I can continue following along with the course. Any ideas?? Also, I just tried tested it in Textwrangler & BBEdit & the CSS showed up perfectly in them, just not in Workspaces.