.math-tunnel .math-depth-layer{display:none}.tunnel-frame{position:absolute;inset:-3%;background:url('mathematics-tunnel.png') center/cover no-repeat;transform-origin:50% 50%;animation:tunnel-forward 22s linear infinite;will-change:transform,opacity;pointer-events:none}.tunnel-frame:nth-of-type(2){animation-delay:-11s}.math-tunnel{background:#041024 url('mathematics-tunnel.png') center/cover no-repeat}.math-tunnel .depth-atmosphere{background:radial-gradient(ellipse at 50% 50%,transparent 15%,#04102415 50%,#04102455 100%)}.math-tunnel .depth-caption{background:#041024a8}.visuals-paused .tunnel-frame{animation-play-state:paused!important}@keyframes tunnel-forward{0%{transform:translate(calc(var(--dx)*.35),calc(var(--dy)*.35)) scale(1);opacity:0}18%{opacity:1}64%{opacity:1}100%{transform:translate(var(--dx),var(--dy)) scale(1.6);opacity:0}}@media(max-width:780px){.tunnel-frame{animation-duration:28s}.tunnel-frame:nth-of-type(2){animation-delay:-14s}}@media(prefers-reduced-motion:reduce){.tunnel-frame{display:none;animation:none!important}}