var gulp = require('gulp');

gulp.task('styles', function() {
    gulp.src('css/*.css')
        .pipe(gulp.dest('dist/app.css'));
});

// TODO: I was in the middle of setting up Gulp and Sass, but my machine's NPM doesn't work.
// http://ryanchristiani.com/getting-started-with-gulp-and-sass/
// https://css-tricks.com/gulp-for-beginners/

@@ -37,14 +37,15 @@
 sk('
-styles
+default
 ', f
@@ -82,16 +82,53 @@
 *.css')%0A
+        .pipe(concat('app.min.css'))%0A
         
@@ -153,15 +153,8 @@
 ist/
-app.css
 '));

Add concat to gulp