html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: #f0f2f5;
  height: 100%;
  width: 100%;
}

#app {
  height: 100%;
  width: 100%;
}

* {
  box-sizing: border-box;
}
