/* Additive enhancements: retain the site's dimensions, colours and transforms. */
html { scroll-behavior: smooth; -webkit-overflow-scrolling: touch; touch-action: manipulation; }
body { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; text-rendering: optimizeLegibility; }
img, video { image-rendering: auto; backface-visibility: hidden; }
/* Only measured, self-contained photo blocks opt in; never the hero or footer. */
.performance-lazy-photo { content-visibility: auto; contain-intrinsic-block-size: auto var(--measured-block-size); }
@view-transition { navigation: auto; }
::view-transition-old(root), ::view-transition-new(root) {
 animation-duration: .25s;
 animation-timing-function: cubic-bezier(.22,1,.36,1);
}
@media (prefers-reduced-motion: reduce) {
 html { scroll-behavior: auto; }
 ::view-transition-old(root), ::view-transition-new(root) { animation: none; }
}
@media print { .performance-lazy-photo { content-visibility: visible; } }