responsive text css

1/* Uses vh and vm with calc */
2@media screen and (min-width: 25em){
3  html { font-size: calc( 16px + (24 - 16) * (100vw - 400px) / (800 - 400) ); }
4}
5
6/* Safari <8 and IE <11 */
7@media screen and (min-width: 25em){
8  html { font-size: calc( 16px + (24 - 16) * (100vw - 400px) / (800 - 400) ); }
9}
10
11@media screen and (min-width: 50em){
12html { font-size: calc( 16px + (24 - 16) * (100vw - 400px) / (800 - 400) ); }
13}

1body {
2  font-size: calc([minimum size] + ([maximum size] - [minimum size]) * ((100vw - [minimum viewport width]) / ([maximum viewport width] - [minimum viewport width])));
3}

1<h1 style="font-size:10vw;">Responsive Text</h1>
2
3<p style="font-size:5vw;">Resize the browser window to see how the text size scales.</p>