Figma with Anima so it outputs html+css that automatically scales to fill the page width

Is there an easy way to create a webpage in Figma then link it to Anima so that it outputs html+css that automatically scales everything to fill the page width?

When building websites by hand I can achieve this by specifying everything in em then setting the font-size of the body in vw.

Something like

body {
font-size:1vw;
}

Is this something missing from Figma or Anima?
Does anyone know if it’s possible when using XD with Anima?