What is the difference if I store the main.css file in /webroot/myapp/css or /webroot/assets/css?
This one is working...
<link rel="stylesheet" href="/assets/css/main.css" type="text/css" />
This one does not...
<link rel="stylesheet" href="/myapp/css/main.css" type="text/css" />
Why?
Load the URL helper and then add to your href like so:
<link rel="stylesheet" href="<?php echo base_url() ?>/assets/css/main.css" type="text/css" />