Thank you for taking the time to provide your feedback on the Kendo UI widgets. It is appreciated.
In general, the library mainly aims at targeting the web environment and is web-oriented. In general, the main issues with the styles come from the fact that certain themes require having more than one file. More information for each of the Less and Sass themes could be found here:
It is correct that the main goal for the live demos is to show isolated example of a single widget with specific functionality. However, the library provides a handful of sample applications. The main purpose of those is to show the incorporation of multiple Kendo UI widgets into a single web app. You could navigate to them by accessing the landing page for the live demos - they are located on the right-hand side of the page:
Here is a direct link to one of them:
I hope you find this helpful.
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