If your theme stylesheet is missing, you might have installed your theme incorrectly. The correct installation steps are as follows:
Step 1: Download the final .zip file from your downloads page.
Step 2: Unzip the final .zip file; you should now have a final download folder.
Step 3: Do NOT upload the final download folder. Open up the final download folder.
Step 4: Browse the contents and find the actual theme folder. If you look inside the theme folder, you will see a style.css file. This is how you know you have found the theme folder.
Step 5: Upload ONLY the theme folder to your wp-content/themes folder.
Step 6: Login to your WordPress admin panel and activate the theme.
As you can see, the stylesheet is found within the theme folder. This is within the download folder that you download as a .zip file from FrogsThemes. People often upload this file directly to their server and find their theme doesn’t work, or their stylesheet is missing.