* { margin:0; padding:0; box-sizing:border-box; }
html, body { width:100%; background:#000; overflow-x:hidden; scrollbar-width:none; }
::-webkit-scrollbar { display:none; }

#spacer { height:600vh; }
#sky { position:fixed; top:0; left:0; z-index:0; will-change:transform; }
.img-layer { position:fixed; top:0; left:0; width:100%; height:100%; pointer-events:none; will-change:transform; }
.img-layer img { position:absolute; max-width:90%; max-height:90%; object-fit:contain; display:block; transform:translate(-50%,-50%); }