message: feat(theme): improve navscreen styles
diff: &.fade-enter-active,
  &.fade-leave-active {
  transition: opacity 0.25s;
  - }
  - &.fade-enter-active .container,
  - &.fade-leave-active .container {
  + .container {
  transition: transform 0.25s ease;
  }
  + }
  &.fade-enter-from,
  &.fade-leave-to {
  opacity: 0;
  - }
  - &.fade-enter-from .container,
  - &.fade-leave-to .container {
  + .container {
  transform: translateY(-8px);
  }
  + }
  .container {
  margin: 0 auto;
  