body {
  background-color: #222;
  color: #bbb;
  margin-left: 20px;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
}

.header {
  display: flex;
  justify-content: center;
  margin-bottom: 20px;
}