Compositing layers

<div class="v"><header>COMPOSITOR <span>paint once · move many</span></header><div class="stage layers"><div class="grid"><i></i><i></i><i></i><i></i><i></i><i></i></div><div class="moving">layer B</div></div><div class="muted">transform → composite</div></div>

.v{width:min(94vw,760px);height:min(88vh,320px);padding:clamp(9px,2.4vmin,18px);border:1px solid var(--line);border-radius:12px;background:var(--surface);font:500 clamp(12px,2.4vmin,16px)/1.3 var(--font-sans,system-ui,sans-serif);display:flex;flex-direction:column;gap:clamp(5px,1.4vmin,10px);overflow:hidden}.v header{display:flex;align-items:center;justify-content:space-between;gap:8px;color:var(--accent);font-weight:700}.v header span{color:var(--muted);font-weight:500}.v .stage{flex:1;min-height:0;position:relative}.v .muted{color:var(--muted)}.v .active{background:color-mix(in srgb,var(--accent) 18%,var(--surface));border-color:var(--accent)!important;color:var(--fg)}.v button{font:inherit;color:var(--fg);background:var(--bg);border:1px solid var(--line);border-radius:7px;padding:5px 8px;cursor:pointer}.layers{display:grid;place-items:center;perspective:500px}.grid{width:65%;height:72%;display:grid;grid-template-columns:repeat(3,1fr);gap:5px;transform:rotateX(10deg);border:1px solid var(--line);padding:8px;border-radius:8px}.grid i{background:color-mix(in srgb,var(--accent-2) 18%,var(--surface));border-radius:3px}.moving{position:absolute;left:32%;top:24%;width:38%;height:40%;display:grid;place-items:center;color:var(--fg);background:color-mix(in srgb,var(--accent) 70%,transparent);border:2px solid var(--accent);border-radius:8px;box-shadow:0 12px 25px #0002;animation:slide 2.5s ease-in-out infinite alternate}@keyframes slide{to{transform:translateX(28%) rotate(-7deg);opacity:.65}}

document.querySelector(".layers").addEventListener("pointerdown",()=>{const m=document.querySelector(".moving");m.style.animationPlayState=m.style.animationPlayState==="paused"?"running":"paused"})