feat(css): make styles layered by default

quartz/plugins/emitters/componentResources.ts

@@ -5,7 +5,8 @@ import { QuartzEmitterPlugin } from "../types"
 import spaRouterScript from "../../components/scripts/spa.inline"
 // @ts-ignore
 import popoverScript from "../../components/scripts/popover.inline"
-import styles from "../../styles/custom.scss"
+import baseStyles from "../../styles/base.scss"
+import customStyles from "../../styles/custom.scss"
 import popoverStyle from "../../components/styles/popover.scss"
 import { BuildCtx } from "../../util/ctx"
 import { QuartzComponent } from "../../components/types"
@@ -329,12 +330,13 @@ export const ComponentResources: QuartzEmitterPlugin = () => {
       // that everyone else had the chance to register a listener for it
       addGlobalPageResources(ctx, componentResources)
 
-      const stylesheet = joinStyles(
+      const quartzBase = joinStyles(
         ctx.cfg.configuration.theme,
         googleFontsStyleSheet,
         ...componentResources.css,
-        styles,
+        baseStyles,
       )
+      const stylesheet = `@layer quartz-base {\n${quartzBase}\n}\n${customStyles}`
 
       const [prescript, postscript] = await Promise.all([
         joinScripts(componentResources.beforeDOMLoaded),

quartz/styles/custom.scss

@@ -1,3 +1,3 @@
-@use "./base.scss";
+@use "./variables.scss" as *;
 
 // put your custom CSS here!