title: Is it possible to alter the size of all html headings with a single css statement while still maintaining their relative sizes to each other?
body: <p>I know that I can change the size of individual html headings using css (e.g., <code>h1 {font-size: 0.5em;}</code>).  However I would like to overall reduce the size of all the headings (h1, h2, h3, etc...) while retaining their relative sizes to each other (h1 > h2 > h3, etc...). </p>
  
  <p>Is it possible change all the heading sizes with a single css statement or will I have to specify each heading separately?</p>