.textbox {
  display: flex;
  flex-direction: column;
  width: 80%;
  padding: calc(80rem / 16);
  background-color: var(--secondary-background);
  border-radius: calc(20rem / 16);
  align-self: center;
}

@media screen and (max-width: 900px) {
  .textbox {
    align-items: center;
  }
}