body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #101827;
  color: white;
}
.app {
  min-height: 100vh;
  display: grid;
  place-items: center;
  text-align: center;
}
button {
  border: 0;
  border-radius: 14px;
  padding: 14px 22px;
  cursor: pointer;
}