Created build-dev script to only build 1 css file for quicker testing enviroment. Added accordion javascript for slide effect. modified the notification scss, and added more demos.

demo/js/accordion.js

@@ -0,0 +1,35 @@
+document.addEventListener("DOMContentLoaded", () => {
+	document.querySelectorAll('details').forEach(el => {
+		let anim = null, opening = false, closing = false
+		let summ = el.querySelector('summary')
+		const runAnim = (height, targetHeight, callback) => {
+			anim?.cancel()
+			anim = el.animate({ height: [`${height}px`,`${targetHeight}px`] },{
+				duration: 400,
+				easing: 'ease-out'
+			})
+			anim.onfinish = () => {
+				anim = null
+				el.style.height = el.style.overflow = ''
+				opening = closing = false
+				callback?.()
+			}
+		}
+
+		summ.addEventListener('click', ev => {
+			ev.preventDefault()
+			el.style.overflow = 'hidden'
+
+			if(!el.open || closing) {
+				el.style.height = `${el.offsetHeight}px`
+				el.open = opening = true
+				runAnim(el.offsetHeight, [...el.children].reduce((a,c) => a+c.offsetHeight, 0))
+				anim.oncancel = () => opening = false
+			} else if(el.open || opening) {
+				closing = true
+				runAnim(el.offsetHeight, summ.offsetHeight, () => el.open = false)
+				anim.oncancel = () => closing = false
+			}
+		})
+	})
+})