A creeping contagion is taking over the ESRI ecosystem. Every update it swallows a little more. Soon, it will devour everything leaving nothing in its wake. The name of this virus is Calcite and it is coming for your CSS. Once Calcite swallows something all your CSS hacks will break as the Shadow DOM and infinite wrappers surround and subsume your target. Calcite will infest everything. We are powerless to stop it. It is different and I am instinctually fearful of change. However, hope is not yet lost, we may not be able to stop Calcite, but we can adapt it.