.track-dot{fill:#e7f5ff;stroke:#5ba2ff;stroke-width:2;filter:drop-shadow(0 0 4px #fff) drop-shadow(0 0 10px #4b91ff);animation:dotHeartbeat 1.15s ease-in-out infinite;transform-box:fill-box;transform-origin:center}
.track-halo{fill:rgba(79,151,255,.22);filter:drop-shadow(0 0 12px #4b91ff);animation:haloHeartbeat 1.15s ease-out infinite;transform-box:fill-box;transform-origin:center}
@keyframes dotHeartbeat{0%,100%{scale:.78;opacity:.72}15%{scale:1.45;opacity:1}28%{scale:.9}42%{scale:1.18}65%{scale:.82}}
@keyframes haloHeartbeat{0%,100%{scale:.7;opacity:.15}18%{scale:2.3;opacity:.58}48%{scale:1.1;opacity:.24}}
@media(prefers-reduced-motion:reduce){.track-dot,.track-halo{display:none}}