/* A decorative ring only: existing SVGs, captions and connectors stay intact. */
body[data-section=preprocessing] .preparation-icon{position:relative}
body[data-section=preprocessing] .preparation-icon::before{
 content:"";
 position:absolute;
 inset:-1px;
 padding:2px;
 border-radius:50%;
 background:conic-gradient(from 0deg,transparent 0deg 245deg,var(--accent) 300deg,var(--light) 335deg,transparent 360deg);
 -webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);
 -webkit-mask-composite:xor;
 mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);
 mask-composite:exclude;
 pointer-events:none;
 opacity:0;
}
body[data-section=preprocessing] .preparation-icon:hover::before{
 opacity:1;
 animation:preparation-contour-orbit 1.6s linear infinite;
}
@keyframes preparation-contour-orbit{to{transform:rotate(360deg)}}
@media(prefers-reduced-motion:reduce){
 body[data-section=preprocessing] .preparation-icon:hover::before{animation:none}
}