.center {
  display: flex;
  justify-content: center;
  align-items: center;
      align-content: center;
  margin: 25%;
}

.box {
  display: flex;
    justify-content: center;
    align-content: center;
  align-items: center;
  margin: auto;
  max-width: 300px;
   font-family: Arial, sans-serif;
}