/* V70: keep the viewport navigation on its own stable compositor layer.
   The nav's live backdrop sampling is replaced by an almost-identical static glass tint,
   avoiding scroll-dependent filter repainting while multiple WebGL scenes are active. */
.header{position:fixed;top:14px;right:0;bottom:auto;left:0;margin:0;transform:translate3d(0,0,0);-webkit-transform:translate3d(0,0,0);backface-visibility:hidden;-webkit-backface-visibility:hidden;will-change:transform;isolation:isolate;animation:none;transition:none}
.header .nav{backdrop-filter:none;-webkit-backdrop-filter:none;background:rgba(239,241,249,.96);transform:none;transition:none}
@media(max-width:820px){.header{top:10px}}