body{
  margin: 0;
  padding: 0;
  font-family: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen-Sans,Ubuntu,Cantarell,"Helvetica Neue",sans-serif;
  background: #efefef;
  color: #444;
  min-height: 100vh;
}
h1,h2,h3,h4,h5,h6{
  padding: 0;
  margin: 0;
  font-weight: normal;
}
button{
  padding: 0.5em;
  border: none;
  background: transparent;
  border: 1px solid #444;
  color: #444;
  font-size: 1em;
  font-weight: bold;
  border-radius: 4px;
  box-sizing: border-box;
}
button.primary{
  background: #00A99D;
  color: white;
}