<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <style> *{ padding: 0; margin: 0; } .father{ font-size: 12px; } .son{ width: 10em; height: 10em; background: blue; } </style> </head> <body> <div class="father"> <div class="son"></div> </div> </body> </html>
Renderings:
