index.css

body, html {
  color: white;
  text-align: center;
  background: linear-gradient(to bottom, #6359CE, #6E83F9);
}

.app{
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 100vw;
  height: 100vh;
}

.page{
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}