* {
  margin: 0;
  padding: 0;
  font-family: BlinkMacSystemFont, -apple-system, Segoe UI, Roboto, Oxygen-Sans, Ubuntu, Cantarell,
      Fira Sans, Droid Sans, Helvetica Neue, Helvetica, Arial, sans-serif;;
  box-sizing: border-box;
}

button:focus {
  outline: none;
}