/* Page transition container */
#page-content {
  opacity: 0;
  transition: opacity 150ms ease-in-out;
}

/* Visible state */
#page-content.is-visible {
  opacity: 1;
}

/* Optional: slightly speed up nav fade-out */
#page-content.is-fading-out {
  transition: opacity 150ms ease-in-out;
}