/* Smooth scrolling + subtle fade effect during scroll
   Safe: does not alter layout; only adjusts opacity briefly while scrolling */
html {
  scroll-behavior: smooth;
}
/* Apply a tiny opacity transition to the page */
body {
  transition: opacity 150ms ease-out;
}
/* Class toggled during wheel/touch/keyboard scroll to create a soft fade */
body.is-scrolling {
  opacity: 0.975; /* very subtle; adjust if needed */
}