update npm deps, tidy makefile

css/Makefile

@@ -2,9 +2,6 @@ lessc := node_modules/.bin/lessc
 lightserver := node_modules/.bin/light-server
 
 NPM != command -v npm 2> /dev/null
-PLEX = less/plex.css
-HACKER = less/hacker/*.less $(PLEX)
-DRACULA = less/dracula/*.less $(PLEX)
 
 .PHONY: build dev clean
 
@@ -14,11 +11,9 @@ build: hacker.css dracula.css
 dev: build
 	$(lightserver) -s . -p 9000 -w "index.html, **/*.less \# make" -o
 
-hacker.css: node_modules $(HACKER)
-	$(lessc) less/hacker.less hacker.css --clean-css="--s1 --advanced --compatibility=ie8"
-
-dracula.css: node_modules $(DRACULA)
-	$(lessc) less/dracula.less dracula.css --clean-css="--s1 --advanced --compatibility=ie8"
+%.css: node_modules less/%/*.less less/plex.css
+	$(info building $@)
+	$(lessc) less/$*.less $*.css --clean-css="--s1 --advanced --compatibility=ie8"
 
 node_modules: package.json package-lock.json Makefile
 ifndef NPM

css/package.json

@@ -12,9 +12,9 @@
     },
     "dependencies": {
         "bootstrap": "3.4.1",
-        "less": "2.7.3",
+        "less": "3.11.1",
         "less-plugin-clean-css": "1.5.1",
-        "light-server": "^2.5.1"
+        "light-server": "^2.6.4"
     },
     "preferGlobal": true,
     "license": "MIT"