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9 changes: 7 additions & 2 deletions components/collapsible-panel/collapsible-panel.js
Original file line number Diff line number Diff line change
Expand Up @@ -173,15 +173,20 @@ class CollapsiblePanel extends SkeletonMixin(FocusMixin(LitElement)) {
border-radius: 0;
outline-offset: -2px;
}

.d2l-collapsible-panel-top-sentinel {
position: relative;
top: calc(-1 * var(--d2l-page-sticky-top, 0px));
}
.d2l-collapsible-panel.scrolled .d2l-collapsible-panel-header {
background-color: var(--d2l-theme-background-color-base);
box-shadow: 0 8px 12px -9px rgba(0, 0, 0, 0.3);
position: sticky;
top: 0;
top: var(--d2l-page-sticky-top, 0);
z-index: 11; /* must be greater greater than list-items with open dropdowns or tooltips */
}
.d2l-collapsible-panel.focused.scrolled .d2l-collapsible-panel-header {
top: 2px;
top: calc(var(--d2l-page-sticky-top, 0px) + 2px);
}
.d2l-collapsible-panel-title {
flex: 1;
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