diff --git a/.stylelintrc.js b/.stylelintrc.js
new file mode 100644
index 00000000..812c1c60
--- /dev/null
+++ b/.stylelintrc.js
@@ -0,0 +1,17 @@
+'use strict';
+
+module.exports = {
+  extends: [
+    'stylelint-config-recommended-scss',
+    'stylelint-config-standard-scss'
+  ],
+  rules: {
+    'selector-class-pattern': [
+      // extending the kebab-case to accept ConverseJS class names.
+      '^([a-z][a-z0-9]*)(-[a-z0-9]+)*(__[a-z]+)?$',
+      {
+        message: 'Expected class selector to be kebab-case, or ConverseJS-style.',
+      }
+    ]
+  }
+}
diff --git a/conversejs/builtin.ts b/conversejs/builtin.ts
index 2dba1615..55338090 100644
--- a/conversejs/builtin.ts
+++ b/conversejs/builtin.ts
@@ -135,6 +135,7 @@ window.initConverse = async function initConverse ({
       emoji: true,
       toggle_occupants: true
     },
+    theme: 'peertube',
     persistent_store: 'sessionStorage'
   }
 
diff --git a/conversejs/custom/sass/_variables.scss b/conversejs/custom/sass/_variables.scss
new file mode 100644
index 00000000..a09ce774
--- /dev/null
+++ b/conversejs/custom/sass/_variables.scss
@@ -0,0 +1,156 @@
+#conversejs.theme-peertube,
+#conversejs-bg.theme-peertube,
+.converse-fullscreen.theme-peertube {
+  --subdued-color: #a8aba1;
+  --green: #3aa569;
+  --redder-orange: #e77051;
+  --orange: #e7a151;
+  --light-blue: #578ea9;
+  --lighter-blue: #85b47b;
+  --chat-status-online: var(--green);
+  --chat-status-busy: var(--redder-orange);
+  --chat-status-away: var(--orange);
+
+  // TODO: is brand-heading-color used?
+  --brand-heading-color: #387592; // $blue
+  --completion-light-color: #ffb9a7; // $lightest-red
+  --completion-normal-color: var(--redder-orange);
+  --completion-dark-color: #d24e2b; // $dark-red
+  --link-color: var(--light-blue);
+  --link-hover-color: var(--lighter-blue);
+  --link-color-lighten-10-percent: #79a5ba; // lighten($light-blue, 10%)
+  --dark-link-color: #206485; // $dark-blue
+  --global-background-color: #fff;
+  --inverse-link-color: white;
+  --text-shadow-color: #fafafa;
+  --text-color: #666;
+  --controlbox-text-color: #ddd;
+  --text-color-lighten-15-percent: #8c8c8c; // lighten(#666, 15%)
+  --message-text-color: #555;
+  --message-receipt-color: var(--green);
+  --save-button-color: var(--green);
+  --message-avatar-width: 36px;
+  --message-avatar-height: 36px;
+  --chat-textarea-color: #666;
+  --chat-textarea-background-color: #f6f6f6;
+  --chat-textarea-height: 60px;
+  --send-button-height: 27px;
+  --send-button-margin: 3px;
+
+  // TODO: is inline-action-margin used?
+  --inline-action-margin: 0.75em;
+  --roster-height: 194px;
+  --chat-correcting-color: #ffffc0;
+  --chat-head-color-dark: #1e9652;
+  --chat-head-color-darker: #0e763b;
+  --chat-head-color-lighten-50-percent: #e7f7ee; // lighten($green, 50%)
+  --chat-head-color: var(--green);
+  --chat-head-text-color: #aaa;
+  --chat-toolbar-btn-color: var(--green);
+  --chat-toolbar-btn-disabled-color: gray;
+  --chat-content-background-color: white;
+  --chat-info-color: var(--subdued-color);
+  --highlight-color: #dcf9f6;
+  --highlight-color-darker: #b0e8e2;
+  --primary-color: var(--light-blue);
+  --primary-color-dark: #397491;
+  --secondary-color: #818479; // gray
+  --secondary-color-dark: #585b51;
+  --warning-color: var(--orange);
+  --warning-color-dark: #d2842b;
+  --danger-color: #d24e2b; // dark-red
+  --danger-color-dark: #a93415; // darker red
+  --light-background-color: #fcfdfd;
+  --error-color: #d24e2b; // dark-red
+  --info-color: #1e9652; // $dark-green
+  --button-border-radius: 5px;
+  --chatbox-border-radius: 0;
+  --groupchats-header-color: var(--redder-orange);
+  --groupchats-header-color-dark: var(--chatroom-head-bg-color-dark);
+  --controlbox-width: 250px;
+  --controlbox-head-color: var(--light-blue);
+  --controlbox-heading-color: #777;
+  --controlbox-heading-font-weight: bold;
+  --controlbox-heading-top-margin: 0.75em;
+  --controlbox-pane-background-color: #333;
+  --controlbox-pane-bg-hover-color: #464646;
+  --panel-divider-color: #333;
+  --chat-gutter: 0.5em;
+  --minimized-chats-width: 130px;
+  --mobile-chat-width: 100%;
+  --mobile-chat-height: 400px;
+
+  // todo: figure out a way to concatenate custom properties with strings.
+  // --font-path: "webfonts/icomoon/fonts/";
+
+  --normal-font: "helvetica", "arial", sans-serif;
+  --heading-font: "muli", normal;
+  --branding-font: "baumans", cursive;
+  --heading-display: inline;
+  --heading-color: #9b4d;
+  --chatroom-badge-color: var(--redder-orange);
+  --chatroom-badge-hover-color: #d24e2b; // $red
+  --chatroom-correcting-color: #ffffc0;
+  --chatroom-head-bg-color: white;
+  --chatroom-head-border-bottom: 1px solid #eee;
+  --chatroom-head-button-color: #999;
+  --chatroom-head-color: #7e7e7e;
+  --chatroom-head-description-border-left: 1px solid #ddd;
+  --chatroom-head-description-color: black;
+  --chatroom-head-description-display: inline;
+  --chatroom-head-description-link-color: #00b3f4;
+  --chatroom-head-description-padding-left: 12px;
+  --chatroom-head-title-font-weight: bold;
+  --chatroom-head-title-padding-right: 12px;
+  --chatroom-width: 500px;
+  --muc-toolbar-btn-color: #7e7e7e;
+  --muc-toolbar-btn-disabled-color: lightgray;
+  --headline-head-color: var(--orange);
+  --headline-message-color: #d2842b;
+  --chatbox-button-size: 14px;
+  --fullpage-chatbox-button-size: 24px;
+  --font-size-tiny: 10px;
+  --font-size-small: 12px;
+  --font-size: 14px;
+  --font-size-large: 16px;
+  --font-size-huge: 20px;
+  --message-font-size: var(--font-size);
+  --separator-text-color: #aaa;
+  --chat-separator-border-bottom: 1px solid #aaa;
+  --chatroom-separator-border-bottom: 1px solid #aaa;
+  --chatroom-message-input-border-top: 1px solid #ccc;
+  --chatbox-message-input-border-top: 1px solid #ccc;
+  --line-height-small: 14px;
+  --line-height: 16px;
+  --line-height-large: 20px;
+  --line-height-huge: 27px;
+  --occupants-padding: 1em;
+  --occupants-background-color: #f3f3f3;
+  --occupants-border-left: 0;
+  --occupants-border-bottom: 0;
+  --embedded-emoji-picker-height: 300px;
+  --avatar-border-radius: 10%;
+  --avatar-border: 0;
+  --avatar-background-color: none;
+  --fullpage-chat-height: calc(var(--vh, 1vh) * 100);
+  --fullpage-chat-width: 100%;
+  --fullpage-emoji-picker-height: 300px;
+  --fullpage-max-chat-textarea-height: 15em;
+  --overlayed-chat-head-height: 55px;
+  --overlayed-chat-height: 450px;
+  --overlayed-chat-width: 300px;
+  --overlayed-chatbox-hover-height: 1em;
+  --overlayed-emoji-picker-height: 200px;
+  --overlayed-max-chat-textarea-height: 200px;
+  --overlayed-badge-color: #818479; // $gray-color
+  --list-toggle-color: #818479; // $gray-color
+  --list-toggle-hover-color: #585b51; // $dark-gray-color
+  --list-toggle-font-weight: bold;
+  --list-item-hover-color: rgb(0 0 0 / 3.5%);
+  --list-item-action-color: #e3eef3; // lighten($lightest-blue, 25%)
+  --list-item-link-color: #f1f1f1;
+  --list-item-link-hover-color: #ddd;
+  --list-item-open-color: #444;
+  --list-item-open-hover-color: #444;
+  --list-dot-circle-color: #f6dec1; // lighten($orange, 25%)
+}
diff --git a/conversejs/custom/sass/livechat.scss b/conversejs/custom/sass/livechat.scss
index c08b5254..b307e995 100644
--- a/conversejs/custom/sass/livechat.scss
+++ b/conversejs/custom/sass/livechat.scss
@@ -1,6 +1,15 @@
+@import "./variables";
 @import "sass/converse";
 
 body.livechat-iframe #conversejs .chat-head {
   // Hidding the chat-head when the plugin is displayed in an iframe.
   display: none;
 }
+
+#conversejs-bg {
+  .converse-brand__heading {
+    img {
+      margin-top: 0.3em;
+    }
+  }
+}
diff --git a/conversejs/custom/templates/background_logo.js b/conversejs/custom/templates/background_logo.js
index bd871feb..305882fb 100644
--- a/conversejs/custom/templates/background_logo.js
+++ b/conversejs/custom/templates/background_logo.js
@@ -3,7 +3,6 @@ import { api } from '@converse/headless/converse-core'
 
 export default () => html`
     <div class="inner-content converse-brand row">
-        <div class="converse-brand__padding"></div>
         <div class="converse-brand__heading">
             <img src="${api.settings.get('assets_path')}/../../images/logo.svg">
         </div>
diff --git a/conversejs/index.html b/conversejs/index.html
index 09b1683b..6850d3e8 100644
--- a/conversejs/index.html
+++ b/conversejs/index.html
@@ -9,9 +9,9 @@
     <script type="text/javaScript" src="{{BASE_STATIC_URL}}conversejs/converse.min.js"></script>
     <script type="text/javascript" src="{{BASE_STATIC_URL}}static/builtin.js"></script>
 </head>
-<body class="converse-fullscreen">
+<body class="converse-fullscreen theme-peertube">
 <noscript>You need to enable JavaScript to run the Converse.js chat app.</noscript>
-<div id="conversejs-bg"></div>
+<div id="conversejs-bg" class="theme-peertube"></div>
 <script type="text/javascript">
   initConverse({
     jid: '{{JID}}',
diff --git a/package-lock.json b/package-lock.json
index 16c2874e..e16a92c9 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "peertube-plugin-livechat",
-  "version": "4.0.3",
+  "version": "5.0.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -285,11 +285,29 @@
       "integrity": "sha512-YATxVxgRqNH6nHEIsvg6k2Boc1JHI9ZbH5iWFFv/MTkchz3b1ieGDa5T0a9RznNdI0KhVbdbWSN+KWWrQZRxTw==",
       "dev": true
     },
+    "@types/minimist": {
+      "version": "1.2.2",
+      "resolved": "https://registry.npmjs.org/@types/minimist/-/minimist-1.2.2.tgz",
+      "integrity": "sha512-jhuKLIRrhvCPLqwPcx6INqmKeiA5EWrsCOPhrlFSrbrmU4ZMPjj5Ul/oLCMDO98XRUIwVm78xICz4EPCektzeQ==",
+      "dev": true
+    },
     "@types/node": {
       "version": "16.11.6",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-16.11.6.tgz",
       "integrity": "sha512-ua7PgUoeQFjmWPcoo9khiPum3Pd60k4/2ZGXt18sm2Slk0W0xZTqt5Y0Ny1NyBiN1EVQ/+FaF9NcY4Qe6rwk5w=="
     },
+    "@types/normalize-package-data": {
+      "version": "2.4.1",
+      "resolved": "https://registry.npmjs.org/@types/normalize-package-data/-/normalize-package-data-2.4.1.tgz",
+      "integrity": "sha512-Gj7cI7z+98M282Tqmp2K5EIsoouUEzbBJhQQzDE3jSIRk6r9gsz0oUokqIUR4u1R3dMHo0pDHM7sNOHyhulypw==",
+      "dev": true
+    },
+    "@types/parse-json": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/@types/parse-json/-/parse-json-4.0.0.tgz",
+      "integrity": "sha512-//oorEZjL6sbPcKUaCdIGlIUeH26mgzimjBB77G6XRgnDl/L5wOnpyBGRe/Mmf5CVW3PwEBE1NjiMZ/ssFh4wA==",
+      "dev": true
+    },
     "@types/qs": {
       "version": "6.9.7",
       "resolved": "https://registry.npmjs.org/@types/qs/-/qs-6.9.7.tgz",
@@ -977,6 +995,12 @@
         }
       }
     },
+    "arrify": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/arrify/-/arrify-1.0.1.tgz",
+      "integrity": "sha1-iYUI2iIm84DfkEcoRWhJwVAaSw0=",
+      "dev": true
+    },
     "asn1.js": {
       "version": "5.4.1",
       "resolved": "https://registry.npmjs.org/asn1.js/-/asn1.js-5.4.1.tgz",
@@ -1478,6 +1502,25 @@
       "integrity": "sha512-L28STB170nwWS63UjtlEOE3dldQApaJXZkOI1uMFfzf3rRuPegHaHesyee+YxQ+W6SvRDQV6UrdOdRiR153wJg==",
       "dev": true
     },
+    "camelcase-keys": {
+      "version": "6.2.2",
+      "resolved": "https://registry.npmjs.org/camelcase-keys/-/camelcase-keys-6.2.2.tgz",
+      "integrity": "sha512-YrwaA0vEKazPBkn0ipTiMpSajYDSe+KjQfrjhcBMxJt/znbvlHd8Pw/Vamaz5EB4Wfhs3SUR3Z9mwRu/P3s3Yg==",
+      "dev": true,
+      "requires": {
+        "camelcase": "^5.3.1",
+        "map-obj": "^4.0.0",
+        "quick-lru": "^4.0.1"
+      },
+      "dependencies": {
+        "quick-lru": {
+          "version": "4.0.1",
+          "resolved": "https://registry.npmjs.org/quick-lru/-/quick-lru-4.0.1.tgz",
+          "integrity": "sha512-ARhCpm70fzdcvNQfPoy49IaanKkTlRWF2JMzqhcJbhSFRZv7nPTvZJdcY7301IPmvW+/p0RgIWnQDLJxifsQ7g==",
+          "dev": true
+        }
+      }
+    },
     "chalk": {
       "version": "2.4.2",
       "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
@@ -1613,6 +1656,15 @@
         }
       }
     },
+    "clone-regexp": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/clone-regexp/-/clone-regexp-2.2.0.tgz",
+      "integrity": "sha512-beMpP7BOtTipFuW8hrJvREQ2DrRu3BE7by0ZpibtfBA+qfHYvMGTc2Yb1JMYPKg/JUw0CHYvpg796aNTSW9z7Q==",
+      "dev": true,
+      "requires": {
+        "is-regexp": "^2.0.0"
+      }
+    },
     "clone-response": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/clone-response/-/clone-response-1.0.2.tgz",
@@ -1781,6 +1833,19 @@
       "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac=",
       "dev": true
     },
+    "cosmiconfig": {
+      "version": "7.0.1",
+      "resolved": "https://registry.npmjs.org/cosmiconfig/-/cosmiconfig-7.0.1.tgz",
+      "integrity": "sha512-a1YWNUV2HwGimB7dU2s1wUMurNKjpx60HxBB6xUM8Re+2s1g1IIfJvFR0/iCF+XHdE0GMTKTuLR32UQff4TEyQ==",
+      "dev": true,
+      "requires": {
+        "@types/parse-json": "^4.0.0",
+        "import-fresh": "^3.2.1",
+        "parse-json": "^5.0.0",
+        "path-type": "^4.0.0",
+        "yaml": "^1.10.0"
+      }
+    },
     "create-ecdh": {
       "version": "4.0.4",
       "resolved": "https://registry.npmjs.org/create-ecdh/-/create-ecdh-4.0.4.tgz",
@@ -1887,6 +1952,12 @@
       "integrity": "sha512-arSMRWIIFY0hV8pIxZMEfmMI47Wj3R/aWpZDDxWYCPEiOMv6tfOrnpDtgxBYPEQD4V0Y/958+1TdC3iWTFcUPw==",
       "dev": true
     },
+    "cssesc": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/cssesc/-/cssesc-3.0.0.tgz",
+      "integrity": "sha512-/Tb/JcjK111nNScGob5MNtsntNM1aCNUDipB/TkwZFhyDrrE47SOx/18wF2bbjgc3ZzCSKW1T5nt5EbFoAz/Vg==",
+      "dev": true
+    },
     "csso": {
       "version": "4.2.0",
       "resolved": "https://registry.npmjs.org/csso/-/csso-4.2.0.tgz",
@@ -1924,6 +1995,24 @@
       "integrity": "sha1-9lNNFRSCabIDUue+4m9QH5oZEpA=",
       "dev": true
     },
+    "decamelize-keys": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/decamelize-keys/-/decamelize-keys-1.1.0.tgz",
+      "integrity": "sha1-0XGoeTMlKAfrPLYdwcFEXQeN8tk=",
+      "dev": true,
+      "requires": {
+        "decamelize": "^1.1.0",
+        "map-obj": "^1.0.0"
+      },
+      "dependencies": {
+        "map-obj": {
+          "version": "1.0.1",
+          "resolved": "https://registry.npmjs.org/map-obj/-/map-obj-1.0.1.tgz",
+          "integrity": "sha1-2TPOuSBdgr3PSIb2dCvcK03qFG0=",
+          "dev": true
+        }
+      }
+    },
     "decode-uri-component": {
       "version": "0.2.0",
       "resolved": "https://registry.npmjs.org/decode-uri-component/-/decode-uri-component-0.2.0.tgz",
@@ -2719,6 +2808,15 @@
         "safe-buffer": "^5.1.1"
       }
     },
+    "execall": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/execall/-/execall-2.0.0.tgz",
+      "integrity": "sha512-0FU2hZ5Hh6iQnarpRtQurM/aAvp3RIbfvgLHrcqJYzhXyV2KFruhuChf9NC6waAhiUR7FFtlugkI4p7f2Fqlow==",
+      "dev": true,
+      "requires": {
+        "clone-regexp": "^2.1.0"
+      }
+    },
     "expand-brackets": {
       "version": "2.1.4",
       "resolved": "https://registry.npmjs.org/expand-brackets/-/expand-brackets-2.1.4.tgz",
@@ -2911,6 +3009,12 @@
       "integrity": "sha512-Utm6CdzT+6xsDk2m8S6uL8VHxNwI6Jub+e9NYTcAms28T84pTa25GJQV9j0CY0N1rM8hK4x6grpF2BQf+2qwVA==",
       "dev": true
     },
+    "fastest-levenshtein": {
+      "version": "1.0.12",
+      "resolved": "https://registry.npmjs.org/fastest-levenshtein/-/fastest-levenshtein-1.0.12.tgz",
+      "integrity": "sha512-On2N+BpYJ15xIC974QNVuYGMOlEVt4s0EOI3wwMqOmK1fdDY+FN/zltPV8vosq4ad4c/gJ1KHScUn/6AWIgiow==",
+      "dev": true
+    },
     "fastq": {
       "version": "1.11.1",
       "resolved": "https://registry.npmjs.org/fastq/-/fastq-1.11.1.tgz",
@@ -3263,6 +3367,12 @@
         "has-symbols": "^1.0.1"
       }
     },
+    "get-stdin": {
+      "version": "8.0.0",
+      "resolved": "https://registry.npmjs.org/get-stdin/-/get-stdin-8.0.0.tgz",
+      "integrity": "sha512-sY22aA6xchAzprjyqmSEQv4UbAAzRN0L2dQB0NlN5acTTK9Don6nhoc3eAbUnpZiCANAMfd/+40kVdKfFygohg==",
+      "dev": true
+    },
     "get-symbol-description": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/get-symbol-description/-/get-symbol-description-1.0.0.tgz",
@@ -3360,6 +3470,12 @@
         "slash": "^3.0.0"
       }
     },
+    "globjoin": {
+      "version": "0.1.4",
+      "resolved": "https://registry.npmjs.org/globjoin/-/globjoin-0.1.4.tgz",
+      "integrity": "sha1-L0SUrIkZ43Z8XLtpHp9GMyQoXUM=",
+      "dev": true
+    },
     "got": {
       "version": "11.8.2",
       "resolved": "https://registry.npmjs.org/got/-/got-11.8.2.tgz",
@@ -3384,6 +3500,12 @@
       "integrity": "sha512-a30VEBm4PEdx1dRB7MFK7BejejvCvBronbLjht+sHuGYj8PHs7M/5Z+rt5lw551vZ7yfTCj4Vuyy3mSJytDWRQ==",
       "dev": true
     },
+    "hard-rejection": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/hard-rejection/-/hard-rejection-2.1.0.tgz",
+      "integrity": "sha512-VIZB+ibDhx7ObhAe7OVtoEbuP4h/MuOTHJ+J8h/eBXotJYl0fBgR72xDFCKgIh22OJZIOVNxBMWuhAr10r8HdA==",
+      "dev": true
+    },
     "has": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/has/-/has-1.0.3.tgz",
@@ -3546,6 +3668,12 @@
       "integrity": "sha512-mxIDAb9Lsm6DoOJ7xH+5+X4y1LU/4Hi50L9C5sIswK3JzULS4bwk1FvjdBgvYR4bzT4tuUQiC15FE2f5HbLvYw==",
       "dev": true
     },
+    "html-tags": {
+      "version": "3.1.0",
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+        "stylelint-config-recommended": "^6.0.0",
+        "stylelint-scss": "^4.0.0"
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+      "dev": true,
+      "requires": {
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+    "stylelint-config-standard-scss": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/stylelint-config-standard-scss/-/stylelint-config-standard-scss-2.0.1.tgz",
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+      "dev": true,
+      "requires": {
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+        "stylelint-config-standard": "^23.0.0"
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+    "stylelint-scss": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/stylelint-scss/-/stylelint-scss-4.0.0.tgz",
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+      "requires": {
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+        "postcss-media-query-parser": "^0.2.3",
+        "postcss-resolve-nested-selector": "^0.1.1",
+        "postcss-selector-parser": "^6.0.6",
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       "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
@@ -5848,6 +6518,12 @@
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+      "resolved": "https://registry.npmjs.org/svg-tags/-/svg-tags-1.0.0.tgz",
+      "integrity": "sha1-WPcc7jvVGbWdSyqEO2x95krAR2Q=",
+      "dev": true
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       "resolved": "https://registry.npmjs.org/svgo/-/svgo-2.8.0.tgz",
@@ -6022,6 +6698,12 @@
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     },
+    "trim-newlines": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/trim-newlines/-/trim-newlines-3.0.1.tgz",
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+      "dev": true
+    },
     "triple-beam": {
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       "resolved": "https://registry.npmjs.org/triple-beam/-/triple-beam-1.3.0.tgz",
@@ -6160,6 +6842,15 @@
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       "dev": true
     },
+    "typedarray-to-buffer": {
+      "version": "3.1.5",
+      "resolved": "https://registry.npmjs.org/typedarray-to-buffer/-/typedarray-to-buffer-3.1.5.tgz",
+      "integrity": "sha512-zdu8XMNEDepKKR+XYOXAVPtWui0ly0NtohUscw+UmaHiAWT8hrV1rr//H6V+0DvJ3OQ19S979M0laLfX8rm82Q==",
+      "dev": true,
+      "requires": {
+        "is-typedarray": "^1.0.0"
+      }
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     "typescript": {
       "version": "4.3.5",
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.3.5.tgz",
@@ -6994,6 +7685,18 @@
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       "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
     },
+    "write-file-atomic": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-3.0.3.tgz",
+      "integrity": "sha512-AvHcyZ5JnSfq3ioSyjrBkH9yW4m7Ayk8/9My/DD9onKeu/94fwrMocemO2QAJFAlnnDN+ZDS+ZjAR5ua1/PV/Q==",
+      "dev": true,
+      "requires": {
+        "imurmurhash": "^0.1.4",
+        "is-typedarray": "^1.0.0",
+        "signal-exit": "^3.0.2",
+        "typedarray-to-buffer": "^3.1.5"
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       "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.2.tgz",
@@ -7012,6 +7715,12 @@
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       "dev": true
     },
+    "yaml": {
+      "version": "1.10.2",
+      "resolved": "https://registry.npmjs.org/yaml/-/yaml-1.10.2.tgz",
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diff --git a/package.json b/package.json
index f333e453..569b2eb7 100644
--- a/package.json
+++ b/package.json
@@ -57,6 +57,9 @@
     "eslint-plugin-promise": "^5.1.1",
     "eslint-plugin-standard": "^5.0.0",
     "npm-run-all": "^4.1.5",
+    "stylelint": "^14.0.1",
+    "stylelint-config-recommended-scss": "^5.0.1",
+    "stylelint-config-standard-scss": "^2.0.1",
     "svgo": "^2.8.0",
     "ts-loader": "^8.3.0",
     "typescript": "^4.3.5",
@@ -84,7 +87,9 @@
     "build:serverconverse": "mkdir -p dist/server/conversejs && cp conversejs/index.html dist/server/conversejs/",
     "build:prosodymodules": "mkdir -p dist/server/prosody-modules && cp -r prosody-modules/* dist/server/prosody-modules/",
     "build": "npm-run-all -s clean:light -p build:converse build:images build:webpack build:server build:serverconverse build:prosodymodules",
-    "lint": "npx eslint --ext .js --ext .ts .",
+    "lint": "npm-run-all -s lint:script lint:styles",
+    "lint:script": "npx eslint --ext .js --ext .ts .",
+    "lint:styles": "stylelint 'conversejs/**/*.scss'",
     "show:npmfiles": "npx npm-packlist"
   },
   "staticDirs": {