/* v1.13 sticky header (David t178u): top bar + back/forward bar always in view; rack column headers stay pinned. Preview only. */
.topbar{position:sticky;top:0;z-index:60}
main>.aen-bar{position:sticky;top:0;z-index:40;box-shadow:0 4px 8px -6px rgba(0,0,0,.6)}
/* rack sits under the sticky back/forward bar, so give it that much less height; its tools row + column heads are already pinned inside it */
.aeg-rack{height:calc(100dvh - var(--top-h) - var(--foot-h) - 16px - var(--aen-h,40px))}
.rack-under .aeg-rack{height:calc(100dvh - var(--top-h) - 110px - var(--aen-h,40px))}
.aeg-rack,.cstrip,.panel,.bigcard{scroll-margin-top:calc(var(--aen-h,40px) + 6px)}
@media (max-width:820px){.aeg-rack{--aen-h:40px}}