fix(callout): Grid-based callout collapsible animation (#1944)

* Fixed broken nested callout maxHeight calculation

* Implemented grid-based callout collapsible

quartz/components/scripts/callout.inline.ts

@@ -1,25 +1,10 @@
 function toggleCallout(this: HTMLElement) {
   const outerBlock = this.parentElement!
   outerBlock.classList.toggle("is-collapsed")
+  const content = outerBlock.getElementsByClassName("callout-content")[0] as HTMLElement
+  if (!content) return
   const collapsed = outerBlock.classList.contains("is-collapsed")
-  const height = collapsed ? this.scrollHeight : outerBlock.scrollHeight
-  outerBlock.style.maxHeight = height + "px"
-
-  // walk and adjust height of all parents
-  let current = outerBlock
-  let parent = outerBlock.parentElement
-  while (parent) {
-    if (!parent.classList.contains("callout")) {
-      return
-    }
-
-    const collapsed = parent.classList.contains("is-collapsed")
-    const height = collapsed ? parent.scrollHeight : parent.scrollHeight + current.scrollHeight
-    parent.style.maxHeight = height + "px"
-
-    current = parent
-    parent = parent.parentElement
-  }
+  content.style.gridTemplateRows = collapsed ? "0fr" : "1fr"
 }
 
 function setupCallout() {
@@ -27,15 +12,15 @@ function setupCallout() {
     `callout is-collapsible`,
   ) as HTMLCollectionOf<HTMLElement>
   for (const div of collapsible) {
-    const title = div.firstElementChild
-    if (!title) continue
+    const title = div.getElementsByClassName("callout-title")[0] as HTMLElement
+    const content = div.getElementsByClassName("callout-content")[0] as HTMLElement
+    if (!title || !content) continue
 
     title.addEventListener("click", toggleCallout)
     window.addCleanup(() => title.removeEventListener("click", toggleCallout))
 
     const collapsed = div.classList.contains("is-collapsed")
-    const height = collapsed ? title.scrollHeight : div.scrollHeight
-    div.style.maxHeight = height + "px"
+    content.style.gridTemplateRows = collapsed ? "0fr" : "1fr"
   }
 }