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