:root{color-scheme:dark}html,body{height:100%}body{margin:0;overflow:hidden;cursor:crosshair;background:radial-gradient(120% 90% at 50% -10%,#0d1b2a,#060b12 45%,#04070a)}.deep{position:fixed;inset:0;overflow:hidden;pointer-events:none}.deep__light{position:absolute;width:70vw;height:70vw;border-radius:50%;filter:blur(110px)}.deep__light--a{top:-30vh;left:-10vw;background:radial-gradient(circle,rgba(32,132,160,.3),transparent 65%);animation:tide 34s ease-in-out infinite alternate}.deep__light--b{bottom:-35vh;right:-15vw;background:radial-gradient(circle,rgba(88,60,170,.26),transparent 65%);animation:tide 42s ease-in-out infinite alternate-reverse}@keyframes tide{to{transform:translate3d(10vw,12vh,0) scale(1.15)}}#tank{position:fixed;inset:0;display:block;width:100%;height:100%}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}@media (prefers-reduced-motion:reduce){.deep__light{animation:none}}