body {
  font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Open Sans, Ubuntu, Fira Sans, Helvetica Neue, sans-serif;
  font-size: 16px;
  margin: 0;
  -webkit-overflow-scrolling: touch;
  overflow-y: scroll;
  
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

button::-moz-focus-inner,
input[type="button"]::-moz-focus-inner {
  border: none;
}