diff --git a/build/build.ts b/build/build.ts
index dc40e18..bd9ad94 100644
--- a/build/build.ts
+++ b/build/build.ts
@@ -28,7 +28,7 @@ import { terser } from "rollup-plugin-terser";
 import webpack from "webpack";
 import postcss from "postcss";
 import postcssImport from "postcss-import";
-import postcssCssNext from "postcss-cssnext";
+import postcssPresetEnv from "postcss-preset-env";
 import cssnano from "cssnano";
 
 const MODE = process.env["NODE_ENV"] || "production";
@@ -162,7 +162,13 @@ async function generateCss(): Promise<void> {
   const cssIn = fs.readFileSync(cssInPath);
   const cssOut = await postcss([
     postcssImport,
-    postcssCssNext({ warnForDuplicates: false }),
+    postcssPresetEnv({
+      stage: 3,
+      features: {
+        "nesting-rules": true,
+        "color-mod-function": true
+      }
+    }),
     cssnano
   ]).process(cssIn, { from: cssInPath, to: cssOutPath });
   fs.writeFileSync(cssOutPath, cssOut.css);
diff --git a/npm-shrinkwrap.json b/npm-shrinkwrap.json
index a487760..718d83e 100644
--- a/npm-shrinkwrap.json
+++ b/npm-shrinkwrap.json
@@ -371,6 +371,12 @@
         }
       }
     },
+    "@csstools/convert-colors": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/@csstools/convert-colors/-/convert-colors-1.4.0.tgz",
+      "integrity": "sha512-5a6wqoJV/xEdbRNKVo6I4hO3VjyDq//8q2f9I6PBAvMesJHFauXDorcNCsr9RzvsZnaWi5NYCcfyqP1QeFHFbw==",
+      "dev": true
+    },
     "@mrmlnc/readdir-enhanced": {
       "version": "2.2.1",
       "resolved": "https://registry.npmjs.org/@mrmlnc/readdir-enhanced/-/readdir-enhanced-2.2.1.tgz",
@@ -1207,54 +1213,74 @@
       "dev": true
     },
     "autoprefixer": {
-      "version": "7.2.6",
-      "resolved": "https://registry.npmjs.org/autoprefixer/-/autoprefixer-7.2.6.tgz",
-      "integrity": "sha512-Iq8TRIB+/9eQ8rbGhcP7ct5cYb/3qjNYAR2SnzLCEcwF6rvVOax8+9+fccgXk4bEhQGjOZd5TLhsksmAdsbGqQ==",
+      "version": "9.6.1",
+      "resolved": "https://registry.npmjs.org/autoprefixer/-/autoprefixer-9.6.1.tgz",
+      "integrity": "sha512-aVo5WxR3VyvyJxcJC3h4FKfwCQvQWb1tSI5VHNibddCVWrcD1NvlxEweg3TSgiPztMnWfjpy2FURKA2kvDE+Tw==",
       "dev": true,
       "requires": {
-        "browserslist": "^2.11.3",
-        "caniuse-lite": "^1.0.30000805",
+        "browserslist": "^4.6.3",
+        "caniuse-lite": "^1.0.30000980",
+        "chalk": "^2.4.2",
         "normalize-range": "^0.1.2",
         "num2fraction": "^1.2.2",
-        "postcss": "^6.0.17",
-        "postcss-value-parser": "^3.2.3"
+        "postcss": "^7.0.17",
+        "postcss-value-parser": "^4.0.0"
       },
       "dependencies": {
         "browserslist": {
-          "version": "2.11.3",
-          "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-2.11.3.tgz",
-          "integrity": "sha512-yWu5cXT7Av6mVwzWc8lMsJMHWn4xyjSuGYi4IozbVTLUOEYPSagUB8kiMDUHA1fS3zjr8nkxkn9jdvug4BBRmA==",
+          "version": "4.6.6",
+          "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.6.6.tgz",
+          "integrity": "sha512-D2Nk3W9JL9Fp/gIcWei8LrERCS+eXu9AM5cfXA8WEZ84lFks+ARnZ0q/R69m2SV3Wjma83QDDPxsNKXUwdIsyA==",
           "dev": true,
           "requires": {
-            "caniuse-lite": "^1.0.30000792",
-            "electron-to-chromium": "^1.3.30"
+            "caniuse-lite": "^1.0.30000984",
+            "electron-to-chromium": "^1.3.191",
+            "node-releases": "^1.1.25"
+          }
+        },
+        "caniuse-lite": {
+          "version": "1.0.30000984",
+          "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30000984.tgz",
+          "integrity": "sha512-n5tKOjMaZ1fksIpQbjERuqCyfgec/m9pferkFQbLmWtqLUdmt12hNhjSwsmPdqeiG2NkITOQhr1VYIwWSAceiA==",
+          "dev": true
+        },
+        "electron-to-chromium": {
+          "version": "1.3.193",
+          "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.3.193.tgz",
+          "integrity": "sha512-WX01CG1UoPtTUFaKKwMn+u8nJ63loP6hNxePWtk1pN8ibWMyX1q6TiWPsz1ABBKXezvmaIdtP+0BwzjC1wyCaw==",
+          "dev": true
+        },
+        "node-releases": {
+          "version": "1.1.25",
+          "resolved": "https://registry.npmjs.org/node-releases/-/node-releases-1.1.25.tgz",
+          "integrity": "sha512-fI5BXuk83lKEoZDdH3gRhtsNgh05/wZacuXkgbiYkceE7+QIMXOg98n9ZV7mz27B+kFHnqHcUpscZZlGRSmTpQ==",
+          "dev": true,
+          "requires": {
+            "semver": "^5.3.0"
           }
         },
         "postcss": {
-          "version": "6.0.23",
-          "resolved": "https://registry.npmjs.org/postcss/-/postcss-6.0.23.tgz",
-          "integrity": "sha512-soOk1h6J3VMTZtVeVpv15/Hpdl2cBLX3CAw4TAbkpTJiNPk9YP/zWcD1ND+xEtvyuuvKzbxliTOIyvkSeSJ6ag==",
+          "version": "7.0.17",
+          "resolved": "https://registry.npmjs.org/postcss/-/postcss-7.0.17.tgz",
+          "integrity": "sha512-546ZowA+KZ3OasvQZHsbuEpysvwTZNGJv9EfyCQdsIDltPSWHAeTQ5fQy/Npi2ZDtLI3zs7Ps/p6wThErhm9fQ==",
           "dev": true,
           "requires": {
-            "chalk": "^2.4.1",
+            "chalk": "^2.4.2",
             "source-map": "^0.6.1",
-            "supports-color": "^5.4.0"
+            "supports-color": "^6.1.0"
           }
         },
+        "postcss-value-parser": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/postcss-value-parser/-/postcss-value-parser-4.0.0.tgz",
+          "integrity": "sha512-ESPktioptiSUchCKgggAkzdmkgzKfmp0EU8jXH+5kbIUB+unr0Y4CY9SRMvibuvYUBjNh1ACLbxqYNpdTQOteQ==",
+          "dev": true
+        },
         "source-map": {
           "version": "0.6.1",
           "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
           "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
           "dev": true
-        },
-        "supports-color": {
-          "version": "5.5.0",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
-          "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
-          "dev": true,
-          "requires": {
-            "has-flag": "^3.0.0"
-          }
         }
       }
     },
@@ -1395,24 +1421,6 @@
         "estraverse": "^4.1.1"
       }
     },
-    "babel-runtime": {
-      "version": "6.26.0",
-      "resolved": "https://registry.npmjs.org/babel-runtime/-/babel-runtime-6.26.0.tgz",
-      "integrity": "sha1-llxwWGaOgrVde/4E/yM3vItWR/4=",
-      "dev": true,
-      "requires": {
-        "core-js": "^2.4.0",
-        "regenerator-runtime": "^0.11.0"
-      },
-      "dependencies": {
-        "regenerator-runtime": {
-          "version": "0.11.1",
-          "resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.11.1.tgz",
-          "integrity": "sha512-MguG95oij0fC3QV3URf4V2SDYGJhJnJGqvIIgdECeODCT98wSWDAJ94SSuVpYQUoTcGUIL6L4yNB7j1DFFHSBg==",
-          "dev": true
-        }
-      }
-    },
     "balanced-match": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
@@ -2520,44 +2528,13 @@
       "integrity": "sha1-ojD2T1aDEOFJgAmUB5DsmVRbyn4=",
       "dev": true
     },
-    "css-color-function": {
-      "version": "1.3.3",
-      "resolved": "https://registry.npmjs.org/css-color-function/-/css-color-function-1.3.3.tgz",
-      "integrity": "sha1-jtJMLAIFBzM5+voAS8jBQfzLKC4=",
+    "css-blank-pseudo": {
+      "version": "0.1.4",
+      "resolved": "https://registry.npmjs.org/css-blank-pseudo/-/css-blank-pseudo-0.1.4.tgz",
+      "integrity": "sha512-LHz35Hr83dnFeipc7oqFDmsjHdljj3TQtxGGiNWSOsTLIAubSm4TEz8qCaKFpk7idaQ1GfWscF4E6mgpBysA1w==",
       "dev": true,
       "requires": {
-        "balanced-match": "0.1.0",
-        "color": "^0.11.0",
-        "debug": "^3.1.0",
-        "rgb": "~0.1.0"
-      },
-      "dependencies": {
-        "balanced-match": {
-          "version": "0.1.0",
-          "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-0.1.0.tgz",
-          "integrity": "sha1-tQS9BYabOSWd0MXvw12EMXbczEo=",
-          "dev": true
-        },
-        "color": {
-          "version": "0.11.4",
-          "resolved": "https://registry.npmjs.org/color/-/color-0.11.4.tgz",
-          "integrity": "sha1-bXtcdPtl6EHNSHkq0e1eB7kE12Q=",
-          "dev": true,
-          "requires": {
-            "clone": "^1.0.2",
-            "color-convert": "^1.3.0",
-            "color-string": "^0.3.0"
-          }
-        },
-        "color-string": {
-          "version": "0.3.0",
-          "resolved": "https://registry.npmjs.org/color-string/-/color-string-0.3.0.tgz",
-          "integrity": "sha1-J9RvtnAlxcL6JZk7+/V55HhBuZE=",
-          "dev": true,
-          "requires": {
-            "color-name": "^1.0.0"
-          }
-        }
+        "postcss": "^7.0.5"
       }
     },
     "css-color-names": {
@@ -2576,6 +2553,25 @@
         "timsort": "^0.3.0"
       }
     },
+    "css-has-pseudo": {
+      "version": "0.10.0",
+      "resolved": "https://registry.npmjs.org/css-has-pseudo/-/css-has-pseudo-0.10.0.tgz",
+      "integrity": "sha512-Z8hnfsZu4o/kt+AuFzeGpLVhFOGO9mluyHBaA2bA8aCGTwah5sT3WV/fTHH8UNZUytOIImuGPrl/prlb4oX4qQ==",
+      "dev": true,
+      "requires": {
+        "postcss": "^7.0.6",
+        "postcss-selector-parser": "^5.0.0-rc.4"
+      }
+    },
+    "css-prefers-color-scheme": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/css-prefers-color-scheme/-/css-prefers-color-scheme-3.1.1.tgz",
+      "integrity": "sha512-MTu6+tMs9S3EUqzmqLXEcgNRbNkkD/TGFvowpeoWJn5Vfq7FMgsmRQs9X5NXAURiOBmOxm/lLjsDNXDE6k9bhg==",
+      "dev": true,
+      "requires": {
+        "postcss": "^7.0.5"
+      }
+    },
     "css-select": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/css-select/-/css-select-2.0.2.tgz",
@@ -2622,6 +2618,12 @@
       "integrity": "sha512-a+EPoD+uZiNfh+5fxw2nO9QwFa6nJe2Or35fGY6Ipw1R3R4AGz1d1TEZrCegvw2YTmZ0jXirGYlzxxpYSHwpEg==",
       "dev": true
     },
+    "cssdb": {
+      "version": "4.4.0",
+      "resolved": "https://registry.npmjs.org/cssdb/-/cssdb-4.4.0.tgz",
+      "integrity": "sha512-LsTAR1JPEM9TpGhl/0p3nQecC2LJ0kD8X5YARu1hk/9I1gril5vDtMZyNxcEpxxDj34YNck/ucjuoUd66K03oQ==",
+      "dev": true
+    },
     "cssesc": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/cssesc/-/cssesc-2.0.0.tgz",
@@ -4920,12 +4922,6 @@
       "integrity": "sha1-6PvzdNxVb/iUehDcsFctYz8s+hA=",
       "dev": true
     },
-    "isnumeric": {
-      "version": "0.2.0",
-      "resolved": "https://registry.npmjs.org/isnumeric/-/isnumeric-0.2.0.tgz",
-      "integrity": "sha1-ojR7o2DeGeM9D/1ZD933dVy/LmQ=",
-      "dev": true
-    },
     "isobject": {
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/isobject/-/isobject-3.0.1.tgz",
@@ -5399,22 +5395,22 @@
       "integrity": "sha1-DdOXEhPHxW34gJd9UEyI+0cal6w="
     },
     "lodash.template": {
-      "version": "4.4.0",
-      "resolved": "https://registry.npmjs.org/lodash.template/-/lodash.template-4.4.0.tgz",
-      "integrity": "sha1-5zoDhcg1VZF0bgILmWecaQ5o+6A=",
+      "version": "4.5.0",
+      "resolved": "https://registry.npmjs.org/lodash.template/-/lodash.template-4.5.0.tgz",
+      "integrity": "sha512-84vYFxIkmidUiFxidA/KjjH9pAycqW+h980j7Fuz5qxRtO9pgB7MDFTdys1N7A5mcucRiDyEq4fusljItR1T/A==",
       "dev": true,
       "requires": {
-        "lodash._reinterpolate": "~3.0.0",
+        "lodash._reinterpolate": "^3.0.0",
         "lodash.templatesettings": "^4.0.0"
       }
     },
     "lodash.templatesettings": {
-      "version": "4.1.0",
-      "resolved": "https://registry.npmjs.org/lodash.templatesettings/-/lodash.templatesettings-4.1.0.tgz",
-      "integrity": "sha1-K01OlbpEDZFf8IvImeRVNmZxMxY=",
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/lodash.templatesettings/-/lodash.templatesettings-4.2.0.tgz",
+      "integrity": "sha512-stgLz+i3Aa9mZgnjr/O+v9ruKZsPsndy7qPZOchbqk2cnTU1ZaldKK+v7m54WoKIyxiuMZTKT2H81F8BeAc3ZQ==",
       "dev": true,
       "requires": {
-        "lodash._reinterpolate": "~3.0.0"
+        "lodash._reinterpolate": "^3.0.0"
       }
     },
     "lodash.unescape": {
@@ -5540,12 +5536,6 @@
         "escape-string-regexp": "^2.0.0"
       }
     },
-    "math-expression-evaluator": {
-      "version": "1.2.17",
-      "resolved": "https://registry.npmjs.org/math-expression-evaluator/-/math-expression-evaluator-1.2.17.tgz",
-      "integrity": "sha1-3oGf282E3M2PrlnGrreWFbnSZqw=",
-      "dev": true
-    },
     "md5-hex": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/md5-hex/-/md5-hex-3.0.0.tgz",
@@ -6214,12 +6204,6 @@
         "wrappy": "1"
       }
     },
-    "onecolor": {
-      "version": "3.1.0",
-      "resolved": "https://registry.npmjs.org/onecolor/-/onecolor-3.1.0.tgz",
-      "integrity": "sha512-YZSypViXzu3ul5LMu/m6XjJ9ol8qAy9S2VjHl5E6UlhUH1KGKWabyEJifn0Jjpw23bYDzC2ucKMPGiH5kfwSGQ==",
-      "dev": true
-    },
     "onetime": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/onetime/-/onetime-2.0.1.tgz",
@@ -6583,55 +6567,6 @@
         "pinkie": "^2.0.0"
       }
     },
-    "pixrem": {
-      "version": "4.0.1",
-      "resolved": "https://registry.npmjs.org/pixrem/-/pixrem-4.0.1.tgz",
-      "integrity": "sha1-LaSh3m7EQjxfw3lOkwuB1EkOxoY=",
-      "dev": true,
-      "requires": {
-        "browserslist": "^2.0.0",
-        "postcss": "^6.0.0",
-        "reduce-css-calc": "^1.2.7"
-      },
-      "dependencies": {
-        "browserslist": {
-          "version": "2.11.3",
-          "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-2.11.3.tgz",
-          "integrity": "sha512-yWu5cXT7Av6mVwzWc8lMsJMHWn4xyjSuGYi4IozbVTLUOEYPSagUB8kiMDUHA1fS3zjr8nkxkn9jdvug4BBRmA==",
-          "dev": true,
-          "requires": {
-            "caniuse-lite": "^1.0.30000792",
-            "electron-to-chromium": "^1.3.30"
-          }
-        },
-        "postcss": {
-          "version": "6.0.23",
-          "resolved": "https://registry.npmjs.org/postcss/-/postcss-6.0.23.tgz",
-          "integrity": "sha512-soOk1h6J3VMTZtVeVpv15/Hpdl2cBLX3CAw4TAbkpTJiNPk9YP/zWcD1ND+xEtvyuuvKzbxliTOIyvkSeSJ6ag==",
-          "dev": true,
-          "requires": {
-            "chalk": "^2.4.1",
-            "source-map": "^0.6.1",
-            "supports-color": "^5.4.0"
-          }
-        },
-        "source-map": {
-          "version": "0.6.1",
-          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
-          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
-          "dev": true
-        },
-        "supports-color": {
-          "version": "5.5.0",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
-          "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
-          "dev": true,
-          "requires": {
-            "has-flag": "^3.0.0"
-          }
-        }
-      }
-    },
     "pkg-conf": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/pkg-conf/-/pkg-conf-3.1.0.tgz",
@@ -6724,44 +6659,6 @@
         }
       }
     },
-    "pleeease-filters": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/pleeease-filters/-/pleeease-filters-4.0.0.tgz",
-      "integrity": "sha1-ZjKy+wVkjSdY2GU4T7zteeHMrsc=",
-      "dev": true,
-      "requires": {
-        "onecolor": "^3.0.4",
-        "postcss": "^6.0.1"
-      },
-      "dependencies": {
-        "postcss": {
-          "version": "6.0.23",
-          "resolved": "https://registry.npmjs.org/postcss/-/postcss-6.0.23.tgz",
-          "integrity": "sha512-soOk1h6J3VMTZtVeVpv15/Hpdl2cBLX3CAw4TAbkpTJiNPk9YP/zWcD1ND+xEtvyuuvKzbxliTOIyvkSeSJ6ag==",
-          "dev": true,
-          "requires": {
-            "chalk": "^2.4.1",
-            "source-map": "^0.6.1",
-            "supports-color": "^5.4.0"
-          }
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-        "source-map": {
-          "version": "0.6.1",
-          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
-          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
-          "dev": true
-        },
-        "supports-color": {
-          "version": "5.5.0",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
-          "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
-          "dev": true,
-          "requires": {
-            "has-flag": "^3.0.0"
-          }
-        }
-      }
-    },
     "plur": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/plur/-/plur-3.1.1.tgz",
@@ -6796,98 +6693,14 @@
         }
       }
     },
-    "postcss-apply": {
-      "version": "0.8.0",
-      "resolved": "https://registry.npmjs.org/postcss-apply/-/postcss-apply-0.8.0.tgz",
-      "integrity": "sha1-FOVEu7XLbxweBIhXll15rgZrE0M=",
-      "dev": true,
-      "requires": {
-        "babel-runtime": "^6.23.0",
-        "balanced-match": "^0.4.2",
-        "postcss": "^6.0.0"
-      },
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@@ -8074,53 +7359,17 @@
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-          "requires": {
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-          }
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-    "postcss-pseudoelements": {
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-      "resolved": "https://registry.npmjs.org/postcss-pseudoelements/-/postcss-pseudoelements-5.0.0.tgz",
-      "integrity": "sha1-7vGU6NUkZFylIKlJ6V5RjoEkAss=",
+    "postcss-pseudo-class-any-link": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/postcss-pseudo-class-any-link/-/postcss-pseudo-class-any-link-6.0.0.tgz",
+      "integrity": "sha512-lgXW9sYJdLqtmw23otOzrtbDXofUdfYzNm4PIpNE322/swES3VU9XlXHeJS46zT2onFO7V1QFdD4Q9LiZj8mew==",
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-      },
-      "dependencies": {
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-          "integrity": "sha512-soOk1h6J3VMTZtVeVpv15/Hpdl2cBLX3CAw4TAbkpTJiNPk9YP/zWcD1ND+xEtvyuuvKzbxliTOIyvkSeSJ6ag==",
-          "dev": true,
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-        },
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-          "dev": true,
-          "requires": {
-            "has-flag": "^3.0.0"
-          }
-        }
+        "postcss": "^7.0.2",
+        "postcss-selector-parser": "^5.0.0-rc.3"
       }
     },
     "postcss-reduce-initial": {
@@ -8148,128 +7397,32 @@
       }
     },
     "postcss-replace-overflow-wrap": {
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-      "integrity": "sha1-eU22+qVPjbEAhUOSqTr0V2i04ls=",
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/postcss-replace-overflow-wrap/-/postcss-replace-overflow-wrap-3.0.0.tgz",
+      "integrity": "sha512-2T5hcEHArDT6X9+9dVSPQdo7QHzG4XKclFT8rU5TzJPDN7RIRTbO9c4drUISOVemLj03aezStHCR2AIcr8XLpw==",
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-      },
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-            "source-map": "^0.6.1",
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-          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
-          "dev": true
-        },
-        "supports-color": {
-          "version": "5.5.0",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
-          "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
-          "dev": true,
-          "requires": {
-            "has-flag": "^3.0.0"
-          }
-        }
+        "postcss": "^7.0.2"
       }
     },
     "postcss-selector-matches": {
-      "version": "3.0.1",
-      "resolved": "https://registry.npmjs.org/postcss-selector-matches/-/postcss-selector-matches-3.0.1.tgz",
-      "integrity": "sha1-5WNAEeE5UIgYYbvdWMLQER/8lqs=",
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/postcss-selector-matches/-/postcss-selector-matches-4.0.0.tgz",
+      "integrity": "sha512-LgsHwQR/EsRYSqlwdGzeaPKVT0Ml7LAT6E75T8W8xLJY62CE4S/l03BWIt3jT8Taq22kXP08s2SfTSzaraoPww==",
       "dev": true,
       "requires": {
-        "balanced-match": "^0.4.2",
-        "postcss": "^6.0.1"
-      },
-      "dependencies": {
-        "balanced-match": {
-          "version": "0.4.2",
-          "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-0.4.2.tgz",
-          "integrity": "sha1-yz8+PHMtwPAe5wtAPzAuYddwmDg=",
-          "dev": true
-        },
-        "postcss": {
-          "version": "6.0.23",
-          "resolved": "https://registry.npmjs.org/postcss/-/postcss-6.0.23.tgz",
-          "integrity": "sha512-soOk1h6J3VMTZtVeVpv15/Hpdl2cBLX3CAw4TAbkpTJiNPk9YP/zWcD1ND+xEtvyuuvKzbxliTOIyvkSeSJ6ag==",
-          "dev": true,
-          "requires": {
-            "chalk": "^2.4.1",
-            "source-map": "^0.6.1",
-            "supports-color": "^5.4.0"
-          }
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-        "source-map": {
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-        "supports-color": {
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-          "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
-          "dev": true,
-          "requires": {
-            "has-flag": "^3.0.0"
-          }
-        }
+        "balanced-match": "^1.0.0",
+        "postcss": "^7.0.2"
       }
     },
     "postcss-selector-not": {
-      "version": "3.0.1",
-      "resolved": "https://registry.npmjs.org/postcss-selector-not/-/postcss-selector-not-3.0.1.tgz",
-      "integrity": "sha1-Lk2y8JZTNsAefOx9tsYN/3ZzNdk=",
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/postcss-selector-not/-/postcss-selector-not-4.0.0.tgz",
+      "integrity": "sha512-W+bkBZRhqJaYN8XAnbbZPLWMvZD1wKTu0UxtFKdhtGjWYmxhkUneoeOhRJKdAE5V7ZTlnbHfCR+6bNwK9e1dTQ==",
       "dev": true,
       "requires": {
-        "balanced-match": "^0.4.2",
-        "postcss": "^6.0.1"
-      },
-      "dependencies": {
-        "balanced-match": {
-          "version": "0.4.2",
-          "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-0.4.2.tgz",
-          "integrity": "sha1-yz8+PHMtwPAe5wtAPzAuYddwmDg=",
-          "dev": true
-        },
-        "postcss": {
-          "version": "6.0.23",
-          "resolved": "https://registry.npmjs.org/postcss/-/postcss-6.0.23.tgz",
-          "integrity": "sha512-soOk1h6J3VMTZtVeVpv15/Hpdl2cBLX3CAw4TAbkpTJiNPk9YP/zWcD1ND+xEtvyuuvKzbxliTOIyvkSeSJ6ag==",
-          "dev": true,
-          "requires": {
-            "chalk": "^2.4.1",
-            "source-map": "^0.6.1",
-            "supports-color": "^5.4.0"
-          }
-        },
-        "source-map": {
-          "version": "0.6.1",
-          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
-          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
-          "dev": true
-        },
-        "supports-color": {
-          "version": "5.5.0",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
-          "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
-          "dev": true,
-          "requires": {
-            "has-flag": "^3.0.0"
-          }
-        }
+        "balanced-match": "^1.0.0",
+        "postcss": "^7.0.2"
       }
     },
     "postcss-selector-parser": {
@@ -8313,9 +7466,9 @@
       "dev": true
     },
     "postcss-values-parser": {
-      "version": "1.5.0",
-      "resolved": "https://registry.npmjs.org/postcss-values-parser/-/postcss-values-parser-1.5.0.tgz",
-      "integrity": "sha512-3M3p+2gMp0AH3da530TlX8kiO1nxdTnc3C6vr8dMxRLIlh8UYkz0/wcwptSXjhtx2Fr0TySI7a+BHDQ8NL7LaQ==",
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/postcss-values-parser/-/postcss-values-parser-2.0.1.tgz",
+      "integrity": "sha512-2tLuBsA6P4rYTNKCXYG/71C7j1pU6pK503suYOmn4xYrQIzW+opD+7FAFNuGSdZC/3Qfy334QbeMu7MEb8gOxg==",
       "dev": true,
       "requires": {
         "flatten": "^1.0.2",
@@ -8638,42 +7791,6 @@
         "strip-indent": "^2.0.0"
       }
     },
-    "reduce-css-calc": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/reduce-css-calc/-/reduce-css-calc-1.3.0.tgz",
-      "integrity": "sha1-dHyRTgSWFKTJz7umKYca0dKSdxY=",
-      "dev": true,
-      "requires": {
-        "balanced-match": "^0.4.2",
-        "math-expression-evaluator": "^1.2.14",
-        "reduce-function-call": "^1.0.1"
-      },
-      "dependencies": {
-        "balanced-match": {
-          "version": "0.4.2",
-          "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-0.4.2.tgz",
-          "integrity": "sha1-yz8+PHMtwPAe5wtAPzAuYddwmDg=",
-          "dev": true
-        }
-      }
-    },
-    "reduce-function-call": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/reduce-function-call/-/reduce-function-call-1.0.2.tgz",
-      "integrity": "sha1-WiAL+S4ON3UXUv5FsKszD9S2vpk=",
-      "dev": true,
-      "requires": {
-        "balanced-match": "^0.4.2"
-      },
-      "dependencies": {
-        "balanced-match": {
-          "version": "0.4.2",
-          "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-0.4.2.tgz",
-          "integrity": "sha1-yz8+PHMtwPAe5wtAPzAuYddwmDg=",
-          "dev": true
-        }
-      }
-    },
     "regenerate": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/regenerate/-/regenerate-1.4.0.tgz",
@@ -8903,18 +8020,6 @@
       "integrity": "sha512-TTlYpa+OL+vMMNG24xSlQGEJ3B/RzEfUlLct7b5G/ytav+wPrplCpVMFuwzXbkecJrb6IYo1iFb0S9v37754mg==",
       "dev": true
     },
-    "rgb": {
-      "version": "0.1.0",
-      "resolved": "https://registry.npmjs.org/rgb/-/rgb-0.1.0.tgz",
-      "integrity": "sha1-vieykej+/+rBvZlylyG/pA/AN7U=",
-      "dev": true
-    },
-    "rgb-hex": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/rgb-hex/-/rgb-hex-2.1.0.tgz",
-      "integrity": "sha1-x3PF/iJoolV42SU5qCp6XOU77aY=",
-      "dev": true
-    },
     "rgb-regex": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/rgb-regex/-/rgb-regex-1.0.1.tgz",
@@ -10210,16 +9315,6 @@
         "uid2": "0.0.3"
       }
     },
-    "units-css": {
-      "version": "0.4.0",
-      "resolved": "https://registry.npmjs.org/units-css/-/units-css-0.4.0.tgz",
-      "integrity": "sha1-1iKGU6UZg9fBb/KPi53Dsf/tOgc=",
-      "dev": true,
-      "requires": {
-        "isnumeric": "^0.2.0",
-        "viewport-dimensions": "^0.2.0"
-      }
-    },
     "unpipe": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
@@ -10401,12 +9496,6 @@
       "integrity": "sha512-fOi47nsJP5Wqefa43kyWSg80qF+Q3XA6MUkgi7Hp1HQaKDQW4cQrK2D0P7mmbFtsV1N89am55Yru/nyEwRubcw==",
       "dev": true
     },
-    "viewport-dimensions": {
-      "version": "0.2.0",
-      "resolved": "https://registry.npmjs.org/viewport-dimensions/-/viewport-dimensions-0.2.0.tgz",
-      "integrity": "sha1-3nQHR9tTh/0XJfUXXpG6x2r982w=",
-      "dev": true
-    },
     "vm-browserify": {
       "version": "0.0.4",
       "resolved": "https://registry.npmjs.org/vm-browserify/-/vm-browserify-0.0.4.tgz",
diff --git a/package.json b/package.json
index 167314d..1e54190 100644
--- a/package.json
+++ b/package.json
@@ -56,8 +56,8 @@
     "esm": "^3.2.25",
     "mithril": "^2.0.0-rc.8",
     "postcss": "^7.0.16",
-    "postcss-cssnext": "^3.1.0",
     "postcss-import": "^12.0.1",
+    "postcss-preset-env": "^6.7.0",
     "prettier": "^1.17.1",
     "rollup": "^1.13.1",
     "rollup-plugin-json": "^4.0.0",
diff --git a/ui/css/app.css b/ui/css/app.css
index ac68deb..d10dc57 100644
--- a/ui/css/app.css
+++ b/ui/css/app.css
@@ -78,7 +78,7 @@ i {
 
 @keyframes pending-blink {
   from {
-    background-color: color(var(--status-green) a(90%));
+    background-color: color-mod(var(--status-green) a(90%));
   }
   to {
     background-color: transparent;
@@ -141,10 +141,10 @@ body {
           }
         }
         & > .stale.active {
-          background-color: color(var(--status-gray) a(90%));
+          background-color: color-mod(var(--status-gray) a(90%));
         }
         & > .fault.active {
-          background-color: color(var(--status-red) a(90%));
+          background-color: color-mod(var(--status-red) a(90%));
         }
         & > .queued.active {
           font-weight: bold;
@@ -183,11 +183,11 @@ body {
           border-radius: 0.4em;
         }
         & > .stale {
-          background-color: color(var(--status-gray) a(90%));
+          background-color: color-mod(var(--status-gray) a(90%));
           border-radius: 0.4em;
         }
         & > .fault {
-          background-color: color(var(--status-red) a(90%));
+          background-color: color-mod(var(--status-red) a(90%));
           border-radius: 0.4em;
         }
         & .parameter {
@@ -227,15 +227,15 @@ body {
         transition: opacity var(--fade), top var(--fade);
 
         &.error {
-          background-color: color(var(--status-red) a(90%));
+          background-color: color-mod(var(--status-red) a(90%));
           border: 1px solid var(--status-red);
         }
         &.success {
-          background-color: color(var(--status-green) a(90%));
+          background-color: color-mod(var(--status-green) a(90%));
           border: 1px solid var(--status-green);
         }
         &.warning {
-          background-color: color(var(--status-yellow) a(90%));
+          background-color: color-mod(var(--status-yellow) a(90%));
           border: 1px solid var(--status-yellow);
         }
       }