How to develop web and mobile app in ionic framework

Hi, I am new to ionic framework. I initially try with sample project to run ionic mobile app. Its work fine in both android and ios. But when i try same project to run in web all UI components are stretched. So my doubt is how to develop app that support both mobile and web using ionic framework. What is the proper procedure to design for web and mobile component ?. We need to design separate UI for mobile and web ? or We can able to customize , resize mobile design to web.

Since, ionic gridsystem based on responsive layout. Designing should not an issue.
Can you please try to show using image?