[Solved] how to stabilize button in div when condensing a page


You are missing the important responsive meta tag:

<meta name="viewport" content="width=device-width, initial-scale=1">

But you are using Bootstrap, which is a responsive framework. So, the answer to your question is to study and understand Bootstrap, along with more general studying of what it means for a site to be responsive.

solved how to stabilize button in div when condensing a page