main#spapp > section {
  display: none;
}

main#spapp > section:last-child {
  display: block;
}

@keyframes appear {
  from {
    width: 0;
    opacity: 0;
  }
  to {
    width: 100%;
    opacity: 1;
  }
}

main#spapp > section:target {
  display: block;
  animation: appear 0.1s linear 1;
}

main#spapp > section:target ~ * {
  display: none;
}