* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  height: 100%;
  background-color: #252525;
  font-family: Arial, sans-serif;
}

.centered {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  color: #fff;
  font-size: 2rem;
  text-align: center;
}