This is a div container of fixed width:1120px / height:630px (a 16:9 ratio)

It will dynamically resize between viewport width 1920px and 240px,

to maintain the same ratio and become width:320px / height:180px
This is a H1 heading of fixed 100px font size  
It will fluidly resize between viewport width 1920px and 240px,
from 100px to 20px depending on the viewport width

HEADING SIZE IS 100