<div style="font-family: Helvetica, Arial, sans-serif;">
  Some sans-serif text.
</div>
<div>
  A container with no font-family specified. The default serif is applied.
</div>

body {
  margin: 0 32px;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}