@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
  body { opacity: 0; transition: opacity .06s ease-out; } /* SUPERFLASH speed */
  body.js-ready { opacity: 1; }
  body.js-leaving { opacity: 0; }
}
img { max-width: 100%; height: auto; display: block; }
[id] { scroll-margin-top: 80px; }