:root{color-scheme:dark}
img{max-width:100%;height:auto}
.aspect-[2/3]{aspect-ratio:2/3}
.aspect-square{aspect-ratio:1/1}

#booksCarousel {
  -webkit-overflow-scrolling: touch;     /* smooth momentum on iOS */
  overscroll-behavior-inline: contain;   /* keep bounce inside the carousel */
}
#booksCarousel > * { flex: 0 0 auto; }   /* belt & suspenders: no shrinking */