diff --git a/gulpfile.js b/gulpfile.js
index fb0537e..40599b3 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -1,61 +1,91 @@
-const gulp = require('gulp');
-const gutil = require('gulp-util');
-const child = require('child_process');
-const browserSync = require('browser-sync').create();
+const gulp = require("gulp");
+const gutil = require("gulp-util");
+const child = require("child_process");
+const browserSync = require("browser-sync").create();
+const siteRoot = "_site";
+const mainCSS = "src/style.css"; /* Main stylesheet (pre-build) */
+const tailwindConfig = "tailwind.js"; /* Tailwind config */
 
-const siteRoot = '_site';
-const mainCSS = 'src/style.css'; /* Main stylesheet (pre-build) */
-const tailwindConfig = 'tailwind.js'; /* Tailwind config */
-
-const jekyll = process.platform === 'win32' ? 'jekyll.bat' : 'jekyll'; /* Fix Windows compatibility issue */
+/**
+ * Fix Windows compatibility issue
+ */
+const jekyll = process.platform === "win32" ? "jekyll.bat" : "jekyll";
 
 /**
  * Build Jekyll Site
  */
-gulp.task('jekyll-build', function () {
-    browserSync.notify('Running: $ jekyll build');
-    return child.spawn(jekyll, ['build'], {stdio: 'inherit'});
+gulp.task("jekyll-build", ["css"], function() {
+  browserSync.notify("Building Jekyll site...");
+  return child.spawn(jekyll, ["build"], { stdio: "inherit" });
 });
 
 /**
- * Compile styles
+ * Custom PurgeCSS Extractor
+ * https://github.com/FullHuman/purgecss
  */
-gulp.task('css', function () {
-  const atimport = require('postcss-import');
-  const postcss = require('gulp-postcss');
-  const tailwindcss = require('tailwindcss');
-  const autoprefixer = require('gulp-autoprefixer');
-  const cleancss = require('gulp-clean-css');
+class TailwindExtractor {
+  static extract(content) {
+    return content.match(/[A-z0-9-:\/]+/g);
+  }
+}
 
-  return gulp.src(mainCSS)
-    .pipe(postcss([
-      atimport(),
-      tailwindcss(tailwindConfig)
-    ]))
-    .pipe(autoprefixer({
-      browsers: ['last 2 versions'],
-      cascade: false
-    }))
+/**
+ * Compile CSS
+ */
+gulp.task("css", function() {
+  const atimport = require("postcss-import");
+  const postcss = require("gulp-postcss");
+  const tailwindcss = require("tailwindcss");
+  const purgecss = require("gulp-purgecss");
+  const autoprefixer = require("gulp-autoprefixer");
+  const cleancss = require("gulp-clean-css");
+
+  browserSync.notify("Compiling CSS...");
+
+  return gulp
+    .src(mainCSS)
+    .pipe(postcss([atimport(), tailwindcss(tailwindConfig)]))
+    .pipe(
+      purgecss({
+        content: ["_site/**/*.html"],
+        extractors: [
+          {
+            extractor: TailwindExtractor,
+            extensions: ["html", "js"]
+          }
+        ]
+      })
+    )
+    .pipe(
+      autoprefixer({
+        browsers: ["last 2 versions"],
+        cascade: false
+      })
+    )
     .pipe(cleancss())
-    .pipe(gulp.dest('assets/css/'))
-    .pipe(gulp.dest('_site/assets/css/'))
+    .pipe(gulp.dest("assets/css/"))
+    .pipe(gulp.dest("_site/assets/css/"));
 });
 
 /**
  * Serve site with Browsersync
  */
-gulp.task('serve', ['jekyll-build'], () => {
+gulp.task("serve", ["jekyll-build"], () => {
   browserSync.init({
-    files: [siteRoot + '/**'],
-    port: 4000,
+    files: [siteRoot + "/**"],
     open: "local",
+    port: 4000,
     server: {
       baseDir: siteRoot
     }
   });
 
-  gulp.watch([mainCSS, tailwindConfig], ['css']);
-  gulp.watch(['**/*.html', '**/*.md', '**/*.yml', '!_site/**/*'], { interval: 500 }, ['jekyll-build']);
+  gulp.watch([mainCSS, tailwindConfig], ["css"]);
+  gulp.watch(
+    ["**/*.html", "**/*.md", "**/*.yml", "!_site/**/*, !node_modules"],
+    { interval: 500 },
+    ["jekyll-build"]
+  );
 });
 
-gulp.task('default', ['css', 'serve']);
+gulp.task("default", ["serve"]);
diff --git a/package-lock.json b/package-lock.json
index 5af05fb..11d7df9 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -82,6 +82,15 @@
         }
       }
     },
+    "ansi-colors": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-1.0.1.tgz",
+      "integrity": "sha512-yopkAU0ZD/WQ56Tms3xLn6jRuX3SyUMAVi0FdmDIbmmnHW3jHiI1sQFdUl3gfVddjnrsP3Y6ywFKvCRopvoVIA==",
+      "dev": true,
+      "requires": {
+        "ansi-wrap": "0.1.0"
+      }
+    },
     "ansi-cyan": {
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/ansi-cyan/-/ansi-cyan-0.1.1.tgz",
@@ -1950,7 +1959,6 @@
             "dashdash": "1.14.1",
             "ecc-jsbn": "0.1.1",
             "getpass": "0.1.7",
-            "jodid25519": "1.0.2",
             "jsbn": "0.1.1",
             "tweetnacl": "0.14.5"
           },
@@ -2388,6 +2396,71 @@
         "vinyl-sourcemaps-apply": "0.2.1"
       }
     },
+    "gulp-purgecss": {
+      "version": "0.20.0",
+      "resolved": "https://registry.npmjs.org/gulp-purgecss/-/gulp-purgecss-0.20.0.tgz",
+      "integrity": "sha512-jM0Sy5pakO1zXcv/EqRQZQMoFUUVQkXAvi9aJCqL1Uk/0cy19oOlDZTg3HhgY+frUc/FX8PyhG1jZAR+uGGJlQ==",
+      "dev": true,
+      "requires": {
+        "glob": "7.1.2",
+        "plugin-error": "1.0.1",
+        "purgecss": "0.20.0",
+        "through2": "2.0.3"
+      },
+      "dependencies": {
+        "arr-diff": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/arr-diff/-/arr-diff-4.0.0.tgz",
+          "integrity": "sha1-1kYQdP6/7HHn4VI1dhoyml3HxSA=",
+          "dev": true
+        },
+        "extend-shallow": {
+          "version": "3.0.2",
+          "resolved": "https://registry.npmjs.org/extend-shallow/-/extend-shallow-3.0.2.tgz",
+          "integrity": "sha1-Jqcarwc7OfshJxcnRhMcJwQCjbg=",
+          "dev": true,
+          "requires": {
+            "assign-symbols": "1.0.0",
+            "is-extendable": "1.0.1"
+          }
+        },
+        "glob": {
+          "version": "7.1.2",
+          "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.2.tgz",
+          "integrity": "sha512-MJTUg1kjuLeQCJ+ccE4Vpa6kKVXkPYJ2mOCQyUuKLcLQsdrMCpBPUi8qVE6+YuaJkozeA9NusTAw3hLr8Xe5EQ==",
+          "dev": true,
+          "requires": {
+            "fs.realpath": "1.0.0",
+            "inflight": "1.0.6",
+            "inherits": "2.0.3",
+            "minimatch": "3.0.4",
+            "once": "1.3.3",
+            "path-is-absolute": "1.0.1"
+          }
+        },
+        "is-extendable": {
+          "version": "1.0.1",
+          "resolved": "https://registry.npmjs.org/is-extendable/-/is-extendable-1.0.1.tgz",
+          "integrity": "sha512-arnXMxT1hhoKo9k1LZdmlNyJdDDfy2v0fXjFlmok4+i8ul/6WlbVge9bhM74OpNPQPMGUToDtz+KXa1PneJxOA==",
+          "dev": true,
+          "requires": {
+            "is-plain-object": "2.0.4"
+          }
+        },
+        "plugin-error": {
+          "version": "1.0.1",
+          "resolved": "https://registry.npmjs.org/plugin-error/-/plugin-error-1.0.1.tgz",
+          "integrity": "sha512-L1zP0dk7vGweZME2i+EeakvUNqSrdiI3F91TwEoYiGrAfUXmVv6fJIq4g82PAXxNsWOp0J7ZqQy/3Szz0ajTxA==",
+          "dev": true,
+          "requires": {
+            "ansi-colors": "1.0.1",
+            "arr-diff": "4.0.0",
+            "arr-union": "3.1.0",
+            "extend-shallow": "3.0.2"
+          }
+        }
+      }
+    },
     "gulp-util": {
       "version": "3.0.8",
       "resolved": "https://registry.npmjs.org/gulp-util/-/gulp-util-3.0.8.tgz",
@@ -2642,6 +2715,12 @@
       "integrity": "sha1-khi5srkoojixPcT7a21XbyMUU+o=",
       "dev": true
     },
+    "indexes-of": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/indexes-of/-/indexes-of-1.0.1.tgz",
+      "integrity": "sha1-8w9xbI4r00bHtn0985FVZqfAVgc=",
+      "dev": true
+    },
     "indexof": {
       "version": "0.0.1",
       "resolved": "https://registry.npmjs.org/indexof/-/indexof-0.0.1.tgz",
@@ -3195,6 +3274,24 @@
         }
       }
     },
+    "locate-path": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/locate-path/-/locate-path-2.0.0.tgz",
+      "integrity": "sha1-K1aLJl7slExtnA3pw9u7ygNUzY4=",
+      "dev": true,
+      "requires": {
+        "p-locate": "2.0.0",
+        "path-exists": "3.0.0"
+      },
+      "dependencies": {
+        "path-exists": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/path-exists/-/path-exists-3.0.0.tgz",
+          "integrity": "sha1-zg6+ql94yxiSXqfYENe1mwEP1RU=",
+          "dev": true
+        }
+      }
+    },
     "lodash": {
       "version": "3.10.1",
       "resolved": "https://registry.npmjs.org/lodash/-/lodash-3.10.1.tgz",
@@ -3385,6 +3482,15 @@
         "object-visit": "1.0.1"
       }
     },
+    "mem": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/mem/-/mem-1.1.0.tgz",
+      "integrity": "sha1-Xt1StIXKHZAP5kiVUFOZoN+kX3Y=",
+      "dev": true,
+      "requires": {
+        "mimic-fn": "1.2.0"
+      }
+    },
     "micromatch": {
       "version": "2.3.11",
       "resolved": "https://registry.npmjs.org/micromatch/-/micromatch-2.3.11.tgz",
@@ -3427,6 +3533,12 @@
         "mime-db": "1.30.0"
       }
     },
+    "mimic-fn": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/mimic-fn/-/mimic-fn-1.2.0.tgz",
+      "integrity": "sha512-jf84uxzwiuiIVKiOLpfYk7N46TSy8ubTonmneY9vrpHNAnp0QBt2BxWV9dO3/j+BoVAb+a5G6YDPW3M5HOdMWQ==",
+      "dev": true
+    },
     "minimatch": {
       "version": "3.0.4",
       "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.4.tgz",
@@ -3562,6 +3674,7 @@
         "detect-libc": "1.0.2",
         "hawk": "3.1.3",
         "mkdirp": "0.5.1",
+        "nopt": "4.0.1",
         "npmlog": "4.1.0",
         "rc": "1.2.4",
         "request": "2.81.0",
@@ -3569,6 +3682,19 @@
         "semver": "5.5.0",
         "tar": "2.2.1",
         "tar-pack": "3.4.0"
+      },
+      "dependencies": {
+        "nopt": {
+          "version": "4.0.1",
+          "resolved": "https://registry.npmjs.org/nopt/-/nopt-4.0.1.tgz",
+          "integrity": "sha1-0NRoWv1UFRk8jHUFYC0NF81kR00=",
+          "dev": true,
+          "optional": true,
+          "requires": {
+            "abbrev": "1.1.1",
+            "osenv": "0.1.4"
+          }
+        }
       }
     },
     "nodemon": {
@@ -4170,8 +4296,7 @@
     "os-homedir": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/os-homedir/-/os-homedir-1.0.2.tgz",
-      "integrity": "sha1-/7xJiDNuDoM94MFox+8VISGqf7M=",
-      "dev": true
+      "integrity": "sha1-/7xJiDNuDoM94MFox+8VISGqf7M="
     },
     "os-locale": {
       "version": "1.4.0",
@@ -4182,12 +4307,50 @@
         "lcid": "1.0.0"
       }
     },
+    "os-tmpdir": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/os-tmpdir/-/os-tmpdir-1.0.2.tgz",
+      "integrity": "sha1-u+Z0BseaqFxc/sdm/lc0VV36EnQ="
+    },
+    "osenv": {
+      "version": "0.1.4",
+      "resolved": "https://registry.npmjs.org/osenv/-/osenv-0.1.4.tgz",
+      "integrity": "sha1-Qv5tWVPfBsgGS+bxdsPQWqqjRkQ=",
+      "requires": {
+        "os-homedir": "1.0.2",
+        "os-tmpdir": "1.0.2"
+      }
+    },
     "p-finally": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/p-finally/-/p-finally-1.0.0.tgz",
       "integrity": "sha1-P7z7FbiZpEEjs0ttzBi3JDNqLK4=",
       "dev": true
     },
+    "p-limit": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-1.2.0.tgz",
+      "integrity": "sha512-Y/OtIaXtUPr4/YpMv1pCL5L5ed0rumAaAeBSj12F+bSlMdys7i8oQF/GUJmfpTS/QoaRrS/k6pma29haJpsMng==",
+      "dev": true,
+      "requires": {
+        "p-try": "1.0.0"
+      }
+    },
+    "p-locate": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/p-locate/-/p-locate-2.0.0.tgz",
+      "integrity": "sha1-IKAQOyIqcMj9OcwuWAaA893l7EM=",
+      "dev": true,
+      "requires": {
+        "p-limit": "1.2.0"
+      }
+    },
+    "p-try": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/p-try/-/p-try-1.0.0.tgz",
+      "integrity": "sha1-y8ec26+P1CKOE/Yh8rGiN8GyB7M=",
+      "dev": true
+    },
     "package-json": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/package-json/-/package-json-4.0.1.tgz",
@@ -4652,6 +4815,17 @@
         }
       }
     },
+    "postcss-selector-parser": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/postcss-selector-parser/-/postcss-selector-parser-3.1.1.tgz",
+      "integrity": "sha1-T4dfSvsMllc9XPTXQBGu4lCn6GU=",
+      "dev": true,
+      "requires": {
+        "dot-prop": "4.2.0",
+        "indexes-of": "1.0.1",
+        "uniq": "1.0.1"
+      }
+    },
     "postcss-value-parser": {
       "version": "3.3.0",
       "resolved": "https://registry.npmjs.org/postcss-value-parser/-/postcss-value-parser-3.3.0.tgz",
@@ -4711,6 +4885,137 @@
       "resolved": "https://registry.npmjs.org/punycode/-/punycode-1.4.1.tgz",
       "integrity": "sha1-wNWmOycYgArY4esPpSachN1BhF4="
     },
+    "purgecss": {
+      "version": "0.20.0",
+      "resolved": "https://registry.npmjs.org/purgecss/-/purgecss-0.20.0.tgz",
+      "integrity": "sha512-YBO44jr8gGgMQe6EWXoFI+70pYdVnK+QPxMLVFWE7lSeq6ttVes8RbFD6Qmx6dYUMCKAjvXW9QhjpeSEMGZavg==",
+      "dev": true,
+      "requires": {
+        "glob": "7.1.2",
+        "postcss": "6.0.16",
+        "postcss-selector-parser": "3.1.1",
+        "yargs": "11.0.0"
+      },
+      "dependencies": {
+        "ansi-regex": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-3.0.0.tgz",
+          "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg=",
+          "dev": true
+        },
+        "camelcase": {
+          "version": "4.1.0",
+          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-4.1.0.tgz",
+          "integrity": "sha1-1UVjW+HjPFQmScaRc+Xeas+uNN0=",
+          "dev": true
+        },
+        "cliui": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/cliui/-/cliui-4.0.0.tgz",
+          "integrity": "sha512-nY3W5Gu2racvdDk//ELReY+dHjb9PlIcVDFXP72nVIhq2Gy3LuVXYwJoPVudwQnv1shtohpgkdCKT2YaKY0CKw==",
+          "dev": true,
+          "requires": {
+            "string-width": "2.1.1",
+            "strip-ansi": "4.0.0",
+            "wrap-ansi": "2.1.0"
+          }
+        },
+        "find-up": {
+          "version": "2.1.0",
+          "resolved": "https://registry.npmjs.org/find-up/-/find-up-2.1.0.tgz",
+          "integrity": "sha1-RdG35QbHF93UgndaK3eSCjwMV6c=",
+          "dev": true,
+          "requires": {
+            "locate-path": "2.0.0"
+          }
+        },
+        "glob": {
+          "version": "7.1.2",
+          "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.2.tgz",
+          "integrity": "sha512-MJTUg1kjuLeQCJ+ccE4Vpa6kKVXkPYJ2mOCQyUuKLcLQsdrMCpBPUi8qVE6+YuaJkozeA9NusTAw3hLr8Xe5EQ==",
+          "dev": true,
+          "requires": {
+            "fs.realpath": "1.0.0",
+            "inflight": "1.0.6",
+            "inherits": "2.0.3",
+            "minimatch": "3.0.4",
+            "once": "1.3.3",
+            "path-is-absolute": "1.0.1"
+          }
+        },
+        "is-fullwidth-code-point": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-2.0.0.tgz",
+          "integrity": "sha1-o7MKXE8ZkYMWeqq5O+764937ZU8=",
+          "dev": true
+        },
+        "os-locale": {
+          "version": "2.1.0",
+          "resolved": "https://registry.npmjs.org/os-locale/-/os-locale-2.1.0.tgz",
+          "integrity": "sha512-3sslG3zJbEYcaC4YVAvDorjGxc7tv6KVATnLPZONiljsUncvihe9BQoVCEs0RZ1kmf4Hk9OBqlZfJZWI4GanKA==",
+          "dev": true,
+          "requires": {
+            "execa": "0.7.0",
+            "lcid": "1.0.0",
+            "mem": "1.1.0"
+          }
+        },
+        "string-width": {
+          "version": "2.1.1",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-2.1.1.tgz",
+          "integrity": "sha512-nOqH59deCq9SRHlxq1Aw85Jnt4w6KvLKqWVik6oA9ZklXLNIOlqg4F2yrT1MVaTjAqvVwdfeZ7w7aCvJD7ugkw==",
+          "dev": true,
+          "requires": {
+            "is-fullwidth-code-point": "2.0.0",
+            "strip-ansi": "4.0.0"
+          }
+        },
+        "strip-ansi": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-4.0.0.tgz",
+          "integrity": "sha1-qEeQIusaw2iocTibY1JixQXuNo8=",
+          "dev": true,
+          "requires": {
+            "ansi-regex": "3.0.0"
+          }
+        },
+        "which-module": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/which-module/-/which-module-2.0.0.tgz",
+          "integrity": "sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho=",
+          "dev": true
+        },
+        "yargs": {
+          "version": "11.0.0",
+          "resolved": "https://registry.npmjs.org/yargs/-/yargs-11.0.0.tgz",
+          "integrity": "sha512-Rjp+lMYQOWtgqojx1dEWorjCofi1YN7AoFvYV7b1gx/7dAAeuI4kN5SZiEvr0ZmsZTOpDRcCqrpI10L31tFkBw==",
+          "dev": true,
+          "requires": {
+            "cliui": "4.0.0",
+            "decamelize": "1.2.0",
+            "find-up": "2.1.0",
+            "get-caller-file": "1.0.2",
+            "os-locale": "2.1.0",
+            "require-directory": "2.1.1",
+            "require-main-filename": "1.0.1",
+            "set-blocking": "2.0.0",
+            "string-width": "2.1.1",
+            "which-module": "2.0.0",
+            "y18n": "3.2.1",
+            "yargs-parser": "9.0.2"
+          }
+        },
+        "yargs-parser": {
+          "version": "9.0.2",
+          "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-9.0.2.tgz",
+          "integrity": "sha1-nM9qQ0YP5O1Aqbto9I1DuKaMwHc=",
+          "dev": true,
+          "requires": {
+            "camelcase": "4.1.0"
+          }
+        }
+      }
+    },
     "qs": {
       "version": "6.2.1",
       "resolved": "https://registry.npmjs.org/qs/-/qs-6.2.1.tgz",
@@ -5021,7 +5326,26 @@
       "version": "2.6.1",
       "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.6.1.tgz",
       "integrity": "sha1-wjOOxkPfeht/5cVPqG9XQopV8z0=",
-      "dev": true
+      "dev": true,
+      "requires": {
+        "glob": "7.1.2"
+      },
+      "dependencies": {
+        "glob": {
+          "version": "7.1.2",
+          "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.2.tgz",
+          "integrity": "sha512-MJTUg1kjuLeQCJ+ccE4Vpa6kKVXkPYJ2mOCQyUuKLcLQsdrMCpBPUi8qVE6+YuaJkozeA9NusTAw3hLr8Xe5EQ==",
+          "dev": true,
+          "requires": {
+            "fs.realpath": "1.0.0",
+            "inflight": "1.0.6",
+            "inherits": "2.0.3",
+            "minimatch": "3.0.4",
+            "once": "1.3.3",
+            "path-is-absolute": "1.0.1"
+          }
+        }
+      }
     },
     "rx": {
       "version": "4.1.0",
@@ -6054,6 +6378,12 @@
         }
       }
     },
+    "uniq": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/uniq/-/uniq-1.0.1.tgz",
+      "integrity": "sha1-sxxa6CVIRKOoKBVBzisEuGWnNP8=",
+      "dev": true
+    },
     "unique-stream": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/unique-stream/-/unique-stream-1.0.0.tgz",
diff --git a/package.json b/package.json
index 8f99d4c..b8eff7d 100644
--- a/package.json
+++ b/package.json
@@ -9,6 +9,7 @@
     "gulp-autoprefixer": "^4.0.0",
     "gulp-clean-css": "^3.9.0",
     "gulp-postcss": "^7.0.0",
+    "gulp-purgecss": "^0.20.0",
     "gulp-util": "^3.0.8",
     "postcss-import": "^11.0.0",
     "tailwindcss": "^0.4.1"