CSS old fashion

• The <h2> element hasn't been sized correctly. The design spec uses 22px to style it, and since no size has been specified in the css, it defaults to the browser default of 1.5em which is 24px assuming a base font size of 16px (also since the base font size hasn't been set in the css for the body element.
• It's a good idea to apply a reset of

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

so you don't have default margins of elements messing with spacing and padding of elements.