body {
  background-color: white;
  font-size: 10px;
}
.container {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}
.box {
  width: 800px;
}
.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 50%;
}