title: Automatically resize HTML buttons based onscreen size?
body: <p>I am making an android mobile app using HTML and JavaScript with CSS. The problem is, I sent it to my friend to test, and the buttons are tiny on his screen. Using CSS, I changed the button size by changing text size in CSS. 
  Is there a way that I could have the button size change automatically so that it is proportional to the screen size?
  If not, how would I make the buttons bigger for larger screens, and smaller for smaller screens?</p>
  
  <p>Please note: I am only using HTML, JavaScript, and CSS. If you give me anything else, please mane it possible to copy and paste because I will not know how to incorporate it in my code.</p>