body {
  font-family: Roboto, sans-serif;
  margin: 0;
  transition: opacity ease-in 0.2s;
}

main {
  padding: 16px;
}

.demo-group, .demo-group-spaced {
  display: flex;
  align-items: center;
}

.wrap {
  flex-wrap: wrap;
}

.demo-group-spaced {
  justify-content: space-around;
}

.demo-group > *, .demo-group-spaced > * {
  margin: 0 8px;
}