UX: add fadeout to topic list on large vp

* Changing the category & tag dropdown back into their original form.
The breadcrumb idea isn't working well.

| BC | AC |
|--------|--------|
| ![CleanShot 2025-06-09 at 18 59
37@2x](https://github.com/user-attachments/assets/cbeb3aaf-ad0e-4085-8548-58ea0a521c95)
| ![CleanShot 2025-06-09 at 18 57
33@2x](https://github.com/user-attachments/assets/15db752b-4983-4b7f-b6f8-9a8ded9e6f9f)
|

* Alignment fix in chat navbar drawer

| BC | AC |
|--------|--------|
| ![CleanShot 2025-06-09 at 18 59
18@2x](https://github.com/user-attachments/assets/38c7dcee-dc77-4a44-ae8d-5ecb7910536b)
| ![CleanShot 2025-06-09 at 18 58
36@2x](https://github.com/user-attachments/assets/be699f88-4e5e-4d8c-ab4d-f6d1eca93037)
|

.discourse-compatibility

@@ -0,0 +1,2 @@
+< 3.5.0.beta5-dev: 31249c4f27d93e83c6b83d42d93974522a9a612e
+

Gemfile.lock

@@ -1,8 +1,9 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (7.2.1.1)
+    activesupport (8.0.2)
       base64
+      benchmark (>= 0.3)
       bigdecimal
       concurrent-ruby (~> 1.0, >= 1.3.1)
       connection_pool (>= 2.2.5)
@@ -12,68 +13,83 @@ GEM
       minitest (>= 5.1)
       securerandom (>= 0.3)
       tzinfo (~> 2.0, >= 2.0.5)
-    ast (2.4.2)
-    base64 (0.2.0)
-    bigdecimal (3.1.8)
-    concurrent-ruby (1.3.4)
-    connection_pool (2.4.1)
-    drb (2.2.1)
-    i18n (1.14.6)
+      uri (>= 0.13.1)
+    ast (2.4.3)
+    base64 (0.3.0)
+    benchmark (0.4.1)
+    bigdecimal (3.2.2)
+    concurrent-ruby (1.3.5)
+    connection_pool (2.5.3)
+    drb (2.2.3)
+    i18n (1.14.7)
       concurrent-ruby (~> 1.0)
-    json (2.7.2)
-    language_server-protocol (3.17.0.3)
-    logger (1.6.1)
-    minitest (5.25.1)
-    parallel (1.26.3)
-    parser (3.3.5.0)
+    json (2.12.2)
+    language_server-protocol (3.17.0.5)
+    lint_roller (1.1.0)
+    logger (1.7.0)
+    minitest (5.25.5)
+    parallel (1.27.0)
+    parser (3.3.8.0)
       ast (~> 2.4.1)
       racc
     prettier_print (1.2.1)
+    prism (1.4.0)
     racc (1.8.1)
-    rack (3.1.10)
+    rack (3.1.15)
     rainbow (3.1.1)
-    regexp_parser (2.9.2)
-    rubocop (1.67.0)
+    regexp_parser (2.10.0)
+    rubocop (1.76.0)
       json (~> 2.3)
-      language_server-protocol (>= 3.17.0)
+      language_server-protocol (~> 3.17.0.2)
+      lint_roller (~> 1.1.0)
       parallel (~> 1.10)
       parser (>= 3.3.0.2)
       rainbow (>= 2.2.2, < 4.0)
-      regexp_parser (>= 2.4, < 3.0)
-      rubocop-ast (>= 1.32.2, < 2.0)
+      regexp_parser (>= 2.9.3, < 3.0)
+      rubocop-ast (>= 1.45.0, < 2.0)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 2.4.0, < 3.0)
-    rubocop-ast (1.32.3)
-      parser (>= 3.3.1.0)
-    rubocop-capybara (2.21.0)
-      rubocop (~> 1.41)
-    rubocop-discourse (3.8.2)
+      unicode-display_width (>= 2.4.0, < 4.0)
+    rubocop-ast (1.45.0)
+      parser (>= 3.3.7.2)
+      prism (~> 1.4)
+    rubocop-capybara (2.22.1)
+      lint_roller (~> 1.1)
+      rubocop (~> 1.72, >= 1.72.1)
+    rubocop-discourse (3.12.1)
       activesupport (>= 6.1)
-      rubocop (>= 1.59.0)
-      rubocop-capybara (>= 2.0.0)
-      rubocop-factory_bot (>= 2.0.0)
-      rubocop-rails (>= 2.25.0)
+      lint_roller (>= 1.1.0)
+      rubocop (>= 1.73.2)
+      rubocop-capybara (>= 2.22.0)
+      rubocop-factory_bot (>= 2.27.0)
+      rubocop-rails (>= 2.30.3)
       rubocop-rspec (>= 3.0.1)
-      rubocop-rspec_rails (>= 2.30.0)
-    rubocop-factory_bot (2.26.1)
-      rubocop (~> 1.61)
-    rubocop-rails (2.26.2)
+      rubocop-rspec_rails (>= 2.31.0)
+    rubocop-factory_bot (2.27.1)
+      lint_roller (~> 1.1)
+      rubocop (~> 1.72, >= 1.72.1)
+    rubocop-rails (2.32.0)
       activesupport (>= 4.2.0)
+      lint_roller (~> 1.1)
       rack (>= 1.1)
-      rubocop (>= 1.52.0, < 2.0)
-      rubocop-ast (>= 1.31.1, < 2.0)
-    rubocop-rspec (3.1.0)
-      rubocop (~> 1.61)
-    rubocop-rspec_rails (2.30.0)
-      rubocop (~> 1.61)
-      rubocop-rspec (~> 3, >= 3.0.1)
+      rubocop (>= 1.75.0, < 2.0)
+      rubocop-ast (>= 1.44.0, < 2.0)
+    rubocop-rspec (3.6.0)
+      lint_roller (~> 1.1)
+      rubocop (~> 1.72, >= 1.72.1)
+    rubocop-rspec_rails (2.31.0)
+      lint_roller (~> 1.1)
+      rubocop (~> 1.72, >= 1.72.1)
+      rubocop-rspec (~> 3.5)
     ruby-progressbar (1.13.0)
-    securerandom (0.3.1)
+    securerandom (0.4.1)
     syntax_tree (6.2.0)
       prettier_print (>= 1.2.0)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
-    unicode-display_width (2.6.0)
+    unicode-display_width (3.1.4)
+      unicode-emoji (~> 4.0, >= 4.0.4)
+    unicode-emoji (4.0.4)
+    uri (1.0.3)
 
 PLATFORMS
   ruby
@@ -83,4 +99,4 @@ DEPENDENCIES
   syntax_tree
 
 BUNDLED WITH
-   2.5.21
+   2.6.9

README.md

@@ -1,5 +1,3 @@
-# next-gen
+Horizon is a simple, beautiful theme that improves the out-of-the-box experience for Discourse sites.
 
-**Theme Summary**
-
-For more information, please see: **url to meta topic**
+https://meta.discourse.org/t/horizon-theme/360486

about.json

@@ -1,40 +1,135 @@
 {
-  "name": "Horizon Theme",
+  "name": "Horizon",
   "authors": "Design Team",
-  "about_url": "TODO: Put your theme's public repo or Meta topic URL here",
-  "license_url": "TODO: Put your theme's LICENSE URL here",
-  "learn_more": "TODO",
+  "about_url": "https://meta.discourse.org/t/horizon-theme/360486",
+  "license_url": "https://github.com/discourse/horizon/blob/main/LICENSE",
+  "learn_more": "https://meta.discourse.org/t/installing-a-theme-or-theme-component/63682",
   "theme_version": "0.0.1",
-  "minimum_discourse_version": null,
-  "maximum_discourse_version": null,
-  "assets": {},
   "modifiers": {
-    "svg_icons": ["fire"]
+    "svg_icons": ["fire"],
+    "serialize_topic_is_hot": true
   },
-  "components": [
-    "https://github.com/discourse/discourse-sidebar-new-topic-button.git",
-    "https://github.com/discourse/discourse-full-width-component.git"
-  ],
   "color_schemes": {
     "Horizon": {
       "primary": "1A1A1A",
       "secondary": "ffffff",
-      "header_background": "f5f8ff",
       "tertiary": "595bca",
-      "tertiary-low": "d8d9f3",
-      "tertiary-50": "f5f8ff",
-      "selected": "d8d9f3",
-      "hover": "ebebf9"
+      "tertiary-med-or-tertiary": "595bca",
+      "selected": "d7dfff",
+      "header_background": "ffffff",
+      "header_primary": "1A1A1A",
+      "hover": "E1E8FF"
     },
     "Horizon Dark": {
-      "primary": "F1EFF9",
-      "secondary": "1e1a36",
-      "header_background": "00091d",
-      "header_primary": "F5F8FF",
-      "tertiary": "6465ab",
-      "tertiary-50": "131124",
-      "selected": "1e1a36",
-      "hover": "131124"
+      "primary": "ffffff",
+      "secondary": "1A1A1A",
+      "tertiary": "595bca",
+      "tertiary-med-or-tertiary": "595bca",
+      "selected": "3b3e56",
+      "header_background": "1A1A1A",
+      "header_primary": "ffffff",
+      "hover": "333548"
+    },
+    "Royal": {
+      "primary": "1A1A1A",
+      "secondary": "ffffff",
+      "tertiary": "1F7BC1",
+      "tertiary-med-or-tertiary": "1F7BC1",
+      "selected": "c7e3ff",
+      "header_background": "ffffff",
+      "header_primary": "1A1A1A",
+      "hover": "D6EBFF"
+    },
+    "Royal Dark": {
+      "primary": "ffffff",
+      "secondary": "1A1A1A",
+      "tertiary": "1F7BC1",
+      "tertiary-med-or-tertiary": "1F7BC1",
+      "selected": "3a455f",
+      "header_background": "1A1A1A",
+      "header_primary": "ffffff",
+      "hover": "323B4E"
+    },
+    "Clover": {
+      "primary": "1A1A1A",
+      "secondary": "ffffff",
+      "tertiary": "39845B",
+      "tertiary-med-or-tertiary": "39845B",
+      "selected": "c6f1d5",
+      "header_background": "ffffff",
+      "header_primary": "1A1A1A",
+      "hover": "D5F5E0"
+    },
+    "Clover Dark": {
+      "primary": "ffffff",
+      "secondary": "1A1A1A",
+      "tertiary": "39845B",
+      "tertiary-med-or-tertiary": "39845B",
+      "selected": "47594e",
+      "header_background": "1A1A1A",
+      "header_primary": "ffffff",
+      "hover": "3C4A40"
+    },
+    "Lily": {
+      "primary": "1A1A1A",
+      "secondary": "ffffff",
+      "tertiary": "cc338c",
+      "tertiary-med-or-tertiary": "cc338c",
+      "selected": "ffc8ee",
+      "header_background": "ffffff",
+      "header_primary": "1A1A1A",
+      "hover": "FFD7F3"
+    },
+    "Lily Dark": {
+      "primary": "ffffff",
+      "secondary": "1A1A1A",
+      "tertiary": "cc338c",
+      "tertiary-med-or-tertiary": "cc338c",
+      "selected": "5f3e4e",
+      "header_background": "1A1A1A",
+      "header_primary": "ffffff",
+      "hover": "4E3640"
+    },
+    "Violet": {
+      "primary": "1A1A1A",
+      "secondary": "ffffff",
+      "tertiary": "9b15de",
+      "tertiary-med-or-tertiary": "9b15de",
+      "selected": "feccff",
+      "header_background": "ffffff",
+      "header_primary": "1A1A1A",
+      "hover": "FFD9FF"
+    },
+    "Violet Dark": {
+      "primary": "ffffff",
+      "secondary": "1A1A1A",
+      "tertiary": "9b15de",
+      "tertiary-med-or-tertiary": "9b15de",
+      "selected": "4c385c",
+      "header_background": "1A1A1A",
+      "header_primary": "ffffff",
+      "hover": "40314C"
+    },
+    "Marigold": {
+      "primary": "1A1A1A",
+      "secondary": "ffffff",
+      "tertiary": "d3881f",
+      "tertiary-med-or-tertiary": "d3881f",
+      "selected": "ffdcb2",
+      "header_background": "ffffff",
+      "header_primary": "1A1A1A",
+      "hover": "FFE6C6"
+    },
+    "Marigold Dark": {
+      "primary": "ffffff",
+      "secondary": "1A1A1A",
+      "tertiary": "d3881f",
+      "tertiary-med-or-tertiary": "d3881f",
+      "selected": "6c5b49",
+      "header_background": "1A1A1A",
+      "header_primary": "ffffff",
+      "hover": "584B3E"
     }
-  }
+  },
+  "screenshots": ["screenshots/light.png", "screenshots/dark.png"]
 }

common/color_definitions.scss

@@ -0,0 +1,105 @@
+html {
+  --accent-color: #{$tertiary} !important;
+  --accent-text-color: #fff;
+
+  // Background Colors
+  --background-color: light-dark(
+    oklch(from #{$tertiary} 96% calc(c * 0.125) h),
+    oklch(from #{$tertiary} 10% 0.025 h)
+  ) !important;
+  --d-content-background: light-dark(
+    oklch(from #{$secondary} calc(2 * l) c h),
+    oklch(from #{$secondary} l c h)
+  ) !important;
+
+  // HeaderColors
+  --header_primary-low-mid: light-dark(
+    oklch(from #{$tertiary} 73.5% calc(c * 0.5) h),
+    oklch(from #{$tertiary} l calc(c * 0.25) h)
+  ) !important;
+  --header_primary-medium: light-dark(
+    oklch(from #{$tertiary} 54% calc(c * 0.5) h),
+    oklch(from #{$tertiary} calc(l * 1.35) calc(c * 0.25) h)
+  ) !important;
+
+  // Sidebar Colors
+  --d-sidebar-border-color: light-dark(
+    oklch(from #{$tertiary} 88% calc(c * 0.25) h),
+    oklch(from #{$tertiary} calc(l * 0.7) calc(c * 0.25) h)
+  ) !important;
+  --d-sidebar-link-color: light-dark(
+    oklch(from #{$tertiary} calc(l * 0.8) calc(c * 0.25) h),
+    oklch(from #{$tertiary} calc(l * 1.5) calc(c * 0.25) h)
+  ) !important;
+  --d-sidebar-active-color: #{$primary} !important;
+  --d-sidebar-suffix-color: light-dark(
+    oklch(from #{$tertiary} l calc(c * 0.9) h),
+    oklch(from #{$tertiary} l calc(c * 0.9) h)
+  ) !important;
+
+  // Other Colors
+  --d-selected: light-dark(
+    oklch(from #{$tertiary} 92% calc(c * 0.5) h),
+    oklch(from #{$tertiary} calc(l * 0.7) calc(c * 0.25) h)
+  ) !important;
+  --d-nav-color--active: light-dark(
+    oklch(from #{$tertiary} l c h),
+    oklch(from #{$tertiary} calc(l * 1.2) c h)
+  ) !important;
+  --d-nav-color--hover: light-dark(
+    oklch(from #{$tertiary} l c h),
+    oklch(from #{$tertiary} calc(l * 1.2) c h)
+  ) !important;
+  --link-color: light-dark(
+    oklch(from #{$tertiary} l c h),
+    oklch(from #{$tertiary} calc(l * 0.95) c h)
+  ) !important;
+  --link-color-hover: light-dark(
+    oklch(from #{$tertiary} l c h),
+    oklch(from #{$tertiary} calc(l * 1.5) calc(c * 2.25) h)
+  ) !important;
+  --tertiary-hover: #{$tertiary} !important;
+
+  // Search Colors
+  --search-color: light-dark(
+    oklch(from #{$tertiary} l c h),
+    oklch(from #{$tertiary} calc(l * 1.5) calc(c * 0.25) h)
+  ) !important;
+
+  // Topic Card Colors
+  --topic-card-shadow: light-dark(
+    oklch(from #{$tertiary} calc(l * 1.85) calc(c * 0.5) h),
+    oklch(from #{$tertiary} calc(l * 0.2) calc(c * 0.01) h / 0.25)
+  ) !important;
+
+  // Button Colors
+  --button-box-shadow: light-dark(
+    oklch(from #{$tertiary} calc(l * 1.5) calc(c * 0.35) h),
+    oklch(from #{$tertiary} calc(l * 0.75) calc(c * 0.5) h)
+  ) !important;
+  --d-sidebar-highlight-hover-icon: var(--d-sidebar-link-color) !important;
+  --d-sidebar-highlight-hover-background: var(--d-selected) !important;
+  --d-sidebar-link-icon-color: var(--d-sidebar-link-color) !important;
+  --d-sidebar-header-color: var(--d-sidebar-link-color) !important;
+  --d-sidebar-header-icon-color: var(--d-sidebar-link-color) !important;
+  --d-sidebar-active-suffix-color: var(--d-sidebar-suffix-color) !important;
+  --d-sidebar-background: var(--background-color) !important;
+  --d-sidebar-footer-fade: var(--background-color) !important;
+  --d-sidebar-prefix-background: var(--d-selected) !important;
+  --d-sidebar-active-prefix-background: light-dark(
+    oklch(from var(--d-selected) calc(l * 0.85) c h),
+    oklch(from var(--d-selected) calc(l * 0.7) c h)
+  ) !important;
+  --d-sidebar-highlight-prefix-background: light-dark(
+    oklch(from var(--d-selected) calc(l * 0.85) c h),
+    oklch(from var(--d-selected) calc(l * 0.7) c h)
+  ) !important;
+  --d-sidebar-highlight-suffix-color: var(
+    --d-sidebar-active-suffix-color
+  ) !important;
+  --d-sidebar-highlight-color: var(--primary) !important;
+  --d-sidebar-highlight-background: var(--d-selected) !important;
+  --d-sidebar-section-link-icon-size: 1em !important;
+  --d-hover: oklch(from var(--d-selected) l c h / 0.75) !important;
+  --d-input-bg-color: var(--d-content-background) !important;
+}

common/common.scss

@@ -2,16 +2,18 @@
 @import "buttons";
 @import "chat";
 @import "color-choice";
-@import "color-exploration";
 @import "composer";
+@import "composer-peek-mode";
 @import "header";
 @import "hiddenstuff";
+@import "login";
 @import "main";
 @import "misc";
 @import "mobile-stuff";
 @import "nav-pills";
-@import "search-banner";
+@import "welcome-banner";
 @import "sidebar";
+@import "sidebar-new-topic-button";
 @import "topic";
 @import "topic-cards";
 @import "variables";

common/head_tag.html

@@ -0,0 +1,7 @@
+<script>
+  if (!CSS.supports("(color: hsl(from white h s l))")) {
+    window.unsupportedBrowser = true;
+    window.I18n.translations[I18n.locale].js.browser_update =
+      'The Horizon theme does not support your browser. Please update your browser, or <a href="?safe_mode=no_themes">switch to safe mode</a>.';
+  }
+</script>

desktop/desktop.scss

@@ -0,0 +1,2 @@
+@import "desktop-horizon-fixes";
+@import "desktop-full-width";

javascripts/discourse/api-initializers/composer-peek-toggle-connector.js

@@ -0,0 +1,6 @@
+import { apiInitializer } from "discourse/lib/api";
+import ComposerPeekModeToggle from "../components/composer-peek-mode-toggle";
+
+export default apiInitializer("1.8.0", (api) => {
+  api.renderInOutlet("before-composer-toggles", ComposerPeekModeToggle);
+});

javascripts/discourse/api-initializers/full-width-logo-behavior.js

@@ -0,0 +1,16 @@
+import { apiInitializer } from "discourse/lib/api";
+
+export default apiInitializer("0.8", (api) => {
+  document.body.classList.add("full-width-enabled");
+
+  // When the sidebar is visible, force the HomeLogo to be in an 'un-minimized' state.
+  api.registerValueTransformer?.(
+    "home-logo-minimized",
+    ({ value, context }) => {
+      if (value && context.showSidebar) {
+        return false;
+      }
+      return value;
+    }
+  );
+});

javascripts/discourse/api-initializers/hamburger-click-outside-transformer.js

@@ -0,0 +1,10 @@
+import { apiInitializer } from "discourse/lib/api";
+
+export default apiInitializer("0.8", (api) => {
+  api.registerValueTransformer(
+    "hamburger-dropdown-click-outside-exceptions",
+    ({ value }) => {
+      return [...value, ".topic-drafts-menu-content"];
+    }
+  );
+});

javascripts/discourse/api-initializers/horizon.gjs

@@ -0,0 +1,16 @@
+import { apiInitializer } from "discourse/lib/api";
+import ExperimentalScreen from "../components/experimental-screen";
+import UserColorPaletteSelector from "../components/user-color-palette-selector";
+
+export default apiInitializer("1.8.0", (api) => {
+  api.renderInOutlet("above-main-container", ExperimentalScreen);
+  api.renderInOutlet("sidebar-footer-actions", UserColorPaletteSelector);
+
+  api.registerValueTransformer("site-setting-enable-welcome-banner", () => {
+    return settings.enable_welcome_banner;
+  });
+
+  api.registerValueTransformer("site-setting-search-experience", () => {
+    return settings.search_experience;
+  });
+});

javascripts/discourse/api-initializers/next-gen.gjs

@@ -1,8 +0,0 @@
-import { apiInitializer } from "discourse/lib/api";
-import CustomColorHtmlClass from "../components/custom-color-html-class";
-import ExperimentalScreen from "../components/experimental-screen";
-
-export default apiInitializer("1.8.0", (api) => {
-  api.renderInOutlet("above-main-container", ExperimentalScreen);
-  api.renderInOutlet("above-main-container", CustomColorHtmlClass);
-});

javascripts/discourse/api-initializers/reposition-bulk-select.js

@@ -0,0 +1,7 @@
+import { apiInitializer } from "discourse/lib/api";
+
+export default apiInitializer("0.8.0", (api) => {
+  api.registerValueTransformer("bulk-select-in-nav-controls", () => {
+    return true;
+  });
+});

javascripts/discourse/api-initializers/sidebar-new-topic-button-connector.js

@@ -0,0 +1,6 @@
+import { apiInitializer } from "discourse/lib/api";
+import SidebarNewTopicButton from "../components/sidebar-new-topic-button";
+
+export default apiInitializer("1.8.0", (api) => {
+  api.renderInOutlet("before-sidebar-sections", SidebarNewTopicButton);
+});

javascripts/discourse/api-initializers/user-pallette.js

@@ -1,6 +0,0 @@
-import { apiInitializer } from "discourse/lib/api";
-import CustomUserPalette from "../components/custom-user-palette";
-
-export default apiInitializer("1.8.0", (api) => {
-  api.renderInOutlet("sidebar-footer-actions", CustomUserPalette);
-});

javascripts/discourse/components/card/topic-activity-column.gjs

@@ -0,0 +1,59 @@
+import Component from "@glimmer/component";
+import concatClass from "discourse/helpers/concat-class";
+import icon from "discourse/helpers/d-icon";
+import formatDate from "discourse/helpers/format-date";
+
+export default class TopicActivityColumn extends Component {
+  get topicUser() {
+    if (
+      moment(this.args.topic.bumped_at).isAfter(this.args.topic.last_posted_at)
+    ) {
+      return {
+        user: undefined,
+        username: undefined,
+        activityText: "user_updated",
+        class: "--updated",
+      };
+    }
+
+    if (this.args.topic.posts_count > 1) {
+      return {
+        user: this.args.topic.lastPosterUser,
+        username: this.args.topic.last_poster_username,
+        activityText: "user_replied",
+        class: "--replied",
+      };
+    } else if (this.args.topic.posts_count === 1) {
+      return {
+        user: this.args.topic.firstPosterUser,
+        username: this.args.topic.last_poster_username,
+        class: "--created",
+      };
+    } else {
+      return;
+    }
+  }
+
+  <template>
+    <span class={{concatClass "topic-activity" this.topicUser.class}}>
+      <div class="topic-activity__type">
+        {{#if this.topicUser.user}}
+          {{icon "reply"}}
+        {{else}}
+          {{icon "pencil"}}
+        {{/if}}
+      </div>
+
+      {{#if this.topicUser.username}}
+        <span
+          class="topic-activity__username"
+        >{{this.topicUser.username}}</span>
+        <span class="dot-separator"></span>
+      {{/if}}
+
+      <div class="topic-activity__time">
+        {{formatDate @topic.bumpedAt leaveAgo="true" format="tiny"}}
+      </div>
+    </span>
+  </template>
+}

javascripts/discourse/components/card/topic-author-avatar-column.gjs

@@ -1,9 +0,0 @@
-import avatar from "discourse/helpers/avatar";
-
-const TopicAuthorAvatarColumn = <template>
-  <span class="topic-author-avatar">
-    {{avatar @topic.creator imageSize="large"}}
-  </span>
-</template>;
-
-export default TopicAuthorAvatarColumn;

javascripts/discourse/components/card/topic-author-column.gjs

@@ -1,5 +0,0 @@
-const TopicAuthorColumn = <template>
-  <span class="topic-author">@{{@topic.creator.username}}</span>
-</template>;
-
-export default TopicAuthorColumn;

javascripts/discourse/components/card/topic-creator-column.gjs

@@ -0,0 +1,19 @@
+import Component from "@glimmer/component";
+import avatar from "discourse/helpers/avatar";
+
+export default class TopicCreatorColumn extends Component {
+  get topicCreator() {
+    return {
+      user: this.args.topic.creator,
+      username: this.args.topic.creator.username,
+      class: "--topic-creator",
+    };
+  }
+
+  <template>
+    <div class={{this.topicUser.class}}>
+      {{avatar this.topicCreator.user}}
+      <span class="topic-creator__username">{{this.topicUser.username}}</span>
+    </div>
+  </template>
+}

javascripts/discourse/components/card/topic-replies-column.gjs

@@ -1,8 +1,8 @@
+import { gt } from "truth-helpers";
 import icon from "discourse/helpers/d-icon";
-import gt from "truth-helpers/helpers/gt";
 
 const TopicRepliesColumn = <template>
-  {{#if (gt @topic.posts_count 1)}}
+  {{#if (gt @topic.replyCount 1)}}
     <span class="topic-replies">{{icon "reply"}}{{@topic.posts_count}}</span>
   {{/if}}
 </template>;

javascripts/discourse/components/card/topic-status-column.gjs

@@ -1,115 +1,36 @@
 import Component from "@glimmer/component";
-import { on } from "@ember/modifier";
-import { action } from "@ember/object";
 import { service } from "@ember/service";
-import { and } from "truth-helpers";
 import icon from "discourse/helpers/d-icon";
 import { i18n } from "discourse-i18n";
 
 export default class TopicStatusColumn extends Component {
-  @service currentUser;
   @service siteSettings;
 
-  get canAct() {
-    return this.currentUser && !this.args.disableActions;
-  }
-
-  get statusClass() {
-    let classes = ["topic-status-card"];
-    if (this.args.topic.bookmarked) {
-      classes.push("--bookmark");
-    } else if (this.args.topic.closed && this.args.topic.archived) {
-      classes.push("--locked --archived");
-    } else if (this.args.topic.closed) {
-      classes.push("--locked");
-    } else if (this.args.topic.archived) {
-      classes.push("--archived");
-    } else if (this.args.topic.is_warning) {
-      classes.push("--warning");
-    } else if (
-      this.args.showPrivateMessageIcon &&
-      this.args.topic.isPrivateMessage
-    ) {
-      classes.push("--private-message");
-    } else if (this.args.topic.pinned) {
-      classes.push("--pinned");
-    } else if (this.args.topic.unpinned) {
-      classes.push("--unpinned");
+  get badge() {
+    if (this.args.topic.is_hot) {
+      return {
+        icon: "fire",
+        text: "topic_hot",
+        className: "--hot",
+      };
     }
-    return classes.join(" ");
-  }
 
-  get heatMap() {
-    return this.args.topic.views > this.siteSettings.topic_views_heat_medium;
-  }
+    if (this.args.topic.pinned) {
+      return {
+        icon: "thumbtack",
+        text: "topic_pinned",
+        className: "--pinned",
+      };
+    }
 
-  @action
-  togglePinned(event) {
-    event.preventDefault();
-    this.args.topic.togglePinnedForUser();
+    return null;
   }
 
   <template>
-    {{#if @topic.bookmarked}}
-      <span class={{this.statusClass}}>{{icon "bookmark"}}{{i18n
-          (themePrefix "topic_bookmarked")
-        }}</span>
-    {{/if}}
-    {{#if (and @topic.closed @topic.archived)~}}
-      <span class={{this.statusClass}}>{{i18n
-          (themePrefix "topic_closed_and_archived")
-        }}</span>
-    {{else if @topic.closed}}
-      <span class={{this.statusClass}}>{{i18n
-          (themePrefix "topic_closed")
-        }}</span>
-    {{else if @topic.archived}}
-      <span class={{this.statusClass}}>{{i18n
-          (themePrefix "topic_archived")
-        }}</span>
-    {{/if}}
-    {{#if @topic.is_warning}}
-      <span class={{this.statusClass}}>{{i18n
-          (themePrefix "topic_warning")
-        }}</span>
-    {{else if (and @showPrivateMessageIcon @topic.isPrivateMessage)}}
-      <span class={{this.statusClass}}>{{i18n
-          (themePrefix "topic_personal_message")
-        }}</span>
-    {{/if}}
-    {{#if @topic.pinned}}
-      {{#if this.canAct}}
-        <button
-          type="button"
-          {{on "click" this.togglePinned}}
-          class={{this.statusClass}}
-        >{{icon "thumbtack"}}{{i18n (themePrefix "topic_pinned")}}</button>
-      {{else}}
-        <span class={{this.statusClass}}>{{icon "thumbtack"}}{{i18n
-            (themePrefix "topic_pinned")
-          }}</span>
-      {{/if}}
-    {{else if @topic.unpinned}}
-      {{#if this.canAct}}
-        <button
-          type="button"
-          {{on "click" this.togglePinned}}
-          class={{this.statusClass}}
-        >{{icon "thumbtack" class="unpinned"}}{{i18n
-            (themePrefix "topic_unpinned")
-          }}</button>
-      {{else}}
-        <span class={{this.statusClass}}>{{icon
-            "thumbtack"
-            class="unpinned"
-          }}{{i18n (themePrefix "topic_unpinned")}}</span>
-      {{/if}}
-    {{/if}}
-
-    {{#if this.heatMap}}
-      <span class="topic-status-card --hot">{{icon "fire"}}{{i18n
-          (themePrefix "topic_hot")
-        }}</span>
+    {{#if this.badge}}
+      <span class="topic-status-card {{this.badge.className}}">{{icon
+          this.badge.icon
+        }}{{i18n (themePrefix this.badge.text)}}</span>
     {{/if}}
   </template>
 }

javascripts/discourse/components/composer-peek-mode-toggle.gjs

@@ -0,0 +1,37 @@
+import Component from "@glimmer/component";
+import { tracked } from "@glimmer/tracking";
+import { action } from "@ember/object";
+import { service } from "@ember/service";
+import DButton from "discourse/components/d-button";
+import bodyClass from "discourse/helpers/body-class";
+
+export default class ComposerPeekModeToggle extends Component {
+  @service composer;
+  @service keyValueStore;
+
+  @tracked
+  peekModeActive = this.keyValueStore.getItem("peekModeActive") === "true";
+
+  get bodyCssClass() {
+    return this.peekModeActive ? "peek-mode-active" : "";
+  }
+
+  @action
+  togglePeekMode() {
+    this.peekModeActive = !this.peekModeActive;
+    this.keyValueStore.setItem("peekModeActive", this.peekModeActive);
+    if (this.composer.showPreview) {
+      this.composer.togglePreview();
+    }
+  }
+
+  <template>
+    {{bodyClass this.bodyCssClass}}
+    <DButton
+      @action={{this.togglePeekMode}}
+      @preventFocus={{true}}
+      @icon="discourse-sidebar"
+      class="btn-mini-toggle no-text peek-mode-toggle btn-transparent"
+    />
+  </template>
+}

javascripts/discourse/components/custom-color-html-class.gjs

@@ -1,12 +0,0 @@
-import Component from "@glimmer/component";
-import { concat } from "@ember/helper";
-import { service } from "@ember/service";
-import htmlClass from "discourse/helpers/html-class";
-
-export default class CustomColorHtmlClass extends Component {
-  @service customColor;
-
-  <template>
-    {{htmlClass (concat "custom-color-" this.customColor.color)}}
-  </template>
-}

javascripts/discourse/components/custom-user-palette.gjs

@@ -1,60 +0,0 @@
-import icon from "discourse/helpers/d-icon";
-import DMenu from "float-kit/components/d-menu";
-import SitePaletteMenuItem from "./site-palette-menu-item";
-
-const PALETTES = [
-  {
-    label: "Marigold",
-    name: "marigold",
-    color: "#d3881f",
-  },
-  {
-    label: "Violet",
-    name: "violet",
-    color: "#9b15de",
-  },
-  {
-    label: "Lily",
-    name: "lily",
-    color: "#CC336F",
-  },
-  {
-    label: "Clover",
-    name: "clover",
-    color: "#45a06e",
-  },
-  {
-    label: "Royal",
-    name: "royal",
-    color: "#4169e1",
-  },
-  {
-    label: "Horizon",
-    name: "horizon",
-    color: "#595bca",
-  },
-];
-
-export const DEFAULT_PALETTE_NAME = "horizon";
-
-<template>
-  <DMenu
-    @identifier="user-color-palette"
-    @placementStrategy="fixed"
-    class="btn-flat user-color-palette sidebar-footer-actions-button"
-    @inline={{true}}
-  >
-    <:trigger>
-      {{icon "paintbrush"}}
-    </:trigger>
-    <:content>
-      <div class="color-palette-menu">
-        <div class="color-palette-menu__content">
-          {{#each PALETTES as |colorPalette|}}
-            <SitePaletteMenuItem @colorPalette={{colorPalette}} />
-          {{/each}}
-        </div>
-      </div>
-    </:content>
-  </DMenu>
-</template>

javascripts/discourse/components/experimental-screen.gjs

@@ -2,10 +2,15 @@ import Component from "@glimmer/component";
 import { tracked } from "@glimmer/tracking";
 import { action } from "@ember/object";
 import didInsert from "@ember/render-modifiers/modifiers/did-insert";
+import { service } from "@ember/service";
 import { htmlSafe } from "@ember/template";
 import { bind } from "discourse/lib/decorators";
 
+const DO_NOT_RENDER_LIST = ["login"];
+
 export default class ExperimentalScreen extends Component {
+  @service router;
+
   @tracked left = 0;
   @tracked right = 0;
   resizeObserver;
@@ -28,6 +33,10 @@ export default class ExperimentalScreen extends Component {
     );
   }
 
+  get shouldRender() {
+    return !DO_NOT_RENDER_LIST.includes(this.router.currentRouteName);
+  }
+
   @action
   onInsert(element) {
     this.calculateDistance(element);
@@ -42,16 +51,18 @@ export default class ExperimentalScreen extends Component {
   }
 
   <template>
-    <ul
-      class="experimental-screen"
-      {{didInsert this.onInsert}}
-      style={{this.distanceStyles}}
-    >
-      <li class="experimental-screen__top-left"></li>
-      <li class="experimental-screen__top-right"></li>
-      <li class="experimental-screen__bottom-left"></li>
-      <li class="experimental-screen__bottom-right"></li>
-      <li class="experimental-screen__bottom-bar"></li>
-    </ul>
+    {{#if this.shouldRender}}
+      <ul
+        class="experimental-screen"
+        {{didInsert this.onInsert}}
+        style={{this.distanceStyles}}
+      >
+        <li class="experimental-screen__top-left"></li>
+        <li class="experimental-screen__top-right"></li>
+        <li class="experimental-screen__bottom-left"></li>
+        <li class="experimental-screen__bottom-right"></li>
+        <li class="experimental-screen__bottom-bar"></li>
+      </ul>
+    {{/if}}
   </template>
 }

javascripts/discourse/components/sidebar-new-topic-button.gjs

@@ -0,0 +1,116 @@
+import Component from "@glimmer/component";
+import { tracked } from "@glimmer/tracking";
+import { action } from "@ember/object";
+import didInsert from "@ember/render-modifiers/modifiers/did-insert";
+import didUpdate from "@ember/render-modifiers/modifiers/did-update";
+import willDestroy from "@ember/render-modifiers/modifiers/will-destroy";
+import { service } from "@ember/service";
+import { gt, not } from "truth-helpers";
+import CreateTopicButton from "discourse/components/create-topic-button";
+
+export default class SidebarNewTopicButton extends Component {
+  @service composer;
+  @service currentUser;
+  @service siteSettings;
+  @service router;
+  @service header;
+  @service appEvents;
+
+  @tracked category;
+  @tracked tag;
+
+  get shouldRender() {
+    return this.currentUser && !this.router.currentRouteName.includes("admin");
+  }
+
+  get canCreateTopic() {
+    return this.currentUser?.can_create_topic;
+  }
+
+  get draftCount() {
+    return this.currentUser?.get("draft_count");
+  }
+
+  get createTopicTargetCategory() {
+    if (this.category?.canCreateTopic) {
+      return this.category;
+    }
+
+    if (this.siteSettings.default_subcategory_on_read_only_category) {
+      return this.category?.subcategoryWithCreateTopicPermission;
+    }
+  }
+
+  get tagRestricted() {
+    return this.tag?.staff;
+  }
+
+  get createTopicDisabled() {
+    return (
+      (this.category && !this.createTopicTargetCategory) ||
+      (this.tagRestricted && !this.currentUser.staff)
+    );
+  }
+
+  get categoryReadOnlyBanner() {
+    if (this.category && this.currentUser && this.createTopicDisabled) {
+      return this.category.read_only_banner;
+    }
+  }
+
+  get createTopicClass() {
+    const baseClasses = "btn-default sidebar-new-topic-button";
+    return this.categoryReadOnlyBanner
+      ? `${baseClasses} disabled`
+      : baseClasses;
+  }
+
+  @action
+  createNewTopic() {
+    this.composer.openNewTopic({ category: this.category, tags: this.tag?.id });
+  }
+
+  @action
+  getCategoryandTag() {
+    this.category = this.router.currentRoute.attributes?.category || null;
+    this.tag = this.router.currentRoute.attributes?.tag || null;
+  }
+
+  @action
+  watchForComposer() {
+    // this covers opening drafts from the hamburger menu
+    this.appEvents.on("composer:will-open", this, this.closeHamburger);
+  }
+
+  @action
+  stopWatchingForComposer() {
+    this.appEvents.off("composer:will-open", this, this.closeHamburger);
+  }
+
+  @action
+  closeHamburger() {
+    this.header.hamburgerVisible = false;
+  }
+
+  <template>
+    {{#if this.shouldRender}}
+      <div
+        class="sidebar-new-topic-button__wrapper"
+        {{didInsert this.getCategoryandTag}}
+        {{didUpdate this.getCategoryandTag this.router.currentRoute}}
+        {{didInsert this.watchForComposer}}
+        {{willDestroy this.stopWatchingForComposer}}
+      >
+        <CreateTopicButton
+          @canCreateTopic={{this.canCreateTopic}}
+          @action={{this.createNewTopic}}
+          @disabled={{this.createTopicDisabled}}
+          @label="topic.create"
+          @btnClass={{this.createTopicClass}}
+          @canCreateTopicOnTag={{not this.tagRestricted}}
+          @showDrafts={{gt this.draftCount 0}}
+        />
+      </div>
+    {{/if}}
+  </template>
+}

javascripts/discourse/components/user-color-palette-menu-item.gjs

@@ -1,40 +1,43 @@
 import Component from "@glimmer/component";
-import { fn } from "@ember/helper";
 import { action } from "@ember/object";
 import { service } from "@ember/service";
 import { htmlSafe } from "@ember/template";
 import DButton from "discourse/components/d-button";
 import concatClass from "discourse/helpers/concat-class";
 
-export default class SitePaletteMenuItem extends Component {
-  @service customColor;
+export default class UserColorPaletteMenuItem extends Component {
+  @service site;
+  @service session;
 
   get siteStyle() {
-    return `--icon-color: ${this.args.colorPalette.color}`;
+    return `--icon-color: ${this.args.colorPalette.accent}`;
   }
 
   get activeClass() {
-    if (this.customColor.color === this.args.colorPalette.name) {
+    if (this.args.selectedColorPaletteId === this.args.colorPalette.id) {
       return "active";
     }
   }
 
   @action
-  handleInput(colorPalette) {
-    this.customColor.setColor(colorPalette.name);
+  paletteSelected() {
+    this.args.paletteSelected(this.args.colorPalette);
   }
 
   <template>
-    <div class="color-palette-menu__item" data-color={{@colorPalette.name}}>
+    <div
+      class="user-color-palette-menu__item"
+      data-color-palette={{@colorPalette.name}}
+    >
       <DButton
         class={{concatClass
-          "btn-flat color-palette-menu__item-choice"
+          "btn-flat user-color-palette-menu__item-choice"
           this.activeClass
         }}
         style={{htmlSafe this.siteStyle}}
         @icon="circle"
-        @translatedLabel={{@colorPalette.label}}
-        @action={{fn this.handleInput @colorPalette}}
+        @translatedLabel={{@colorPalette.name}}
+        @action={{this.paletteSelected}}
       />
     </div>
   </template>

javascripts/discourse/components/user-color-palette-selector.gjs

@@ -0,0 +1,210 @@
+import Component from "@glimmer/component";
+import { tracked } from "@glimmer/tracking";
+import { action } from "@ember/object";
+import { service } from "@ember/service";
+import { isEmpty } from "@ember/utils";
+import { Promise } from "rsvp";
+import concatClass from "discourse/helpers/concat-class";
+import icon from "discourse/helpers/d-icon";
+import { reload } from "discourse/helpers/page-reloader";
+import { ajax } from "discourse/lib/ajax";
+import {
+  listColorSchemes,
+  updateColorSchemeCookie,
+} from "discourse/lib/color-scheme-picker";
+import cookie from "discourse/lib/cookie";
+import DMenu from "float-kit/components/d-menu";
+import UserColorPaletteMenuItem from "./user-color-palette-menu-item";
+
+const HORIZON_PALETTES = [
+  "Horizon",
+  "Marigold",
+  "Violet",
+  "Lily",
+  "Clover",
+  "Royal",
+];
+
+export default class UserColorPaletteSelector extends Component {
+  @service currentUser;
+  @service keyValueStore;
+  @service site;
+  @service session;
+  @service interfaceColor;
+
+  @tracked anonColorPaletteId = this.#loadAnonColorPalette();
+  @tracked userColorPaletteId = this.session.userColorSchemeId;
+  @tracked cssLoaded = true;
+
+  get userColorPalettes() {
+    const availablePalettes = listColorSchemes(this.site)
+      ?.map((userPalette) => {
+        return {
+          ...userPalette,
+          accent: `#${
+            userPalette.colors.find((color) => color.name === "tertiary").hex
+          }`,
+        };
+      })
+      .filter((userPalette) => {
+        return HORIZON_PALETTES.some((palette) => {
+          return userPalette.name.toLowerCase().includes(palette.toLowerCase());
+        });
+      })
+      .sort();
+
+    // Match the light scheme with the corresponding dark id based in the name
+    return (
+      availablePalettes
+        ?.map((palette) => {
+          if (palette.is_dark) {
+            return palette;
+          }
+
+          const normalizedLightName = palette.name.toLowerCase();
+
+          const correspondingDarkModeId = availablePalettes.find(
+            (item) =>
+              item.is_dark &&
+              normalizedLightName ===
+                item.name.toLowerCase().replace(/\s+dark$/, "")
+          )?.id;
+
+          return {
+            ...palette,
+            correspondingDarkModeId,
+          };
+        })
+        // Only want to show palettes that have corresponding light/dark modes
+        .filter((palette) => !palette.is_dark)
+    );
+  }
+
+  get selectedColorPaletteId() {
+    if (this.currentUser) {
+      return this.userColorPaletteId;
+    }
+
+    return this.anonColorPaletteId;
+  }
+
+  @action
+  onRegisterMenu(api) {
+    this.dMenu = api;
+  }
+
+  @action
+  paletteSelected(selectedPalette) {
+    if (selectedPalette.id === this.selectedColorPaletteId) {
+      return;
+    }
+
+    this.#updatePreference(selectedPalette);
+    this.#changeSiteColorPalette(selectedPalette);
+    this.dMenu.close();
+  }
+
+  #updatePreference(selectedPalette) {
+    updateColorSchemeCookie(selectedPalette.id);
+    updateColorSchemeCookie(selectedPalette.correspondingDarkModeId, {
+      dark: true,
+    });
+
+    if (!this.currentUser) {
+      this.anonColorPaletteId = selectedPalette.id;
+    } else {
+      this.userColorPaletteId = selectedPalette.id;
+    }
+  }
+
+  #loadAnonColorPalette() {
+    const storedAnonPaletteId = cookie("color_scheme_id");
+    if (storedAnonPaletteId) {
+      return parseInt(storedAnonPaletteId, 10);
+    }
+  }
+
+  async #changeSiteColorPalette(colorPalette) {
+    this.cssLoaded = false;
+
+    const lightPaletteId = colorPalette.id;
+    const darkPaletteId = colorPalette.correspondingDarkModeId;
+    const darkTag = document.querySelector("link.dark-scheme");
+
+    // TODO(osama) once we have built-in light/dark modes for each palette, we
+    // can stop making the 2nd ajax call for the dark palette and replace it
+    // with a include_dark_scheme param on the ajax call for the light
+    // palette which will include the href for the dark palette in the response
+    if (!darkTag) {
+      reload();
+      return;
+    }
+
+    const lightPaletteInfo = await ajax(
+      `/color-scheme-stylesheet/${lightPaletteId}/${colorPalette.theme_id}.json`
+    );
+    const darkPaletteInfo = await ajax(
+      `/color-scheme-stylesheet/${darkPaletteId}/${colorPalette.theme_id}.json`
+    );
+
+    Promise.all([
+      this.#preloadAndSwapCSS(lightPaletteInfo.new_href, "light-scheme"),
+      this.#preloadAndSwapCSS(darkPaletteInfo.new_href, "dark-scheme"),
+    ]).then(() => {
+      this.cssLoaded = true;
+    });
+  }
+
+  #preloadAndSwapCSS(newHref, existingLinkClass) {
+    return new Promise((resolve) => {
+      const existingLink = document.querySelector(
+        `link[rel='stylesheet'].${existingLinkClass}`
+      );
+      const newTag = document.createElement("link");
+
+      newTag.rel = "preload";
+      newTag.href = newHref;
+      newTag.as = "style";
+      newTag.onload = () => {
+        existingLink.href = newHref;
+        newTag.remove();
+        resolve();
+      };
+
+      document.head.appendChild(newTag);
+    });
+  }
+
+  <template>
+    {{#unless (isEmpty this.userColorPalettes)}}
+      <DMenu
+        @identifier="user-color-palette-selector"
+        @placementStrategy="fixed"
+        @onRegisterApi={{this.onRegisterMenu}}
+        class={{concatClass
+          "btn-flat user-color-palette-selector sidebar-footer-actions-button"
+          (if this.cssLoaded "user-color-palette-css-loaded")
+        }}
+        data-selected-color-palette-id={{this.selectedColorPaletteId}}
+        @inline={{true}}
+      >
+        <:trigger>
+          {{icon "paintbrush"}}
+        </:trigger>
+        <:content>
+          <div class="user-color-palette-menu">
+            <div class="user-color-palette-menu__content">
+              {{#each this.userColorPalettes as |colorPalette|}}
+                <UserColorPaletteMenuItem
+                  @selectedColorPaletteId={{this.selectedColorPaletteId}}
+                  @colorPalette={{colorPalette}}
+                  @paletteSelected={{this.paletteSelected}}
+                />
+              {{/each}}
+            </div>
+          </div>
+        </:content>
+      </DMenu>
+    {{/unless}}
+  </template>
+}

javascripts/discourse/initializers/topic-list-columns.gjs

@@ -1,30 +1,29 @@
 import { withPluginApi } from "discourse/lib/plugin-api";
-import TopicAuthorAvatarColumn from "../components/card/topic-author-avatar-column";
-import TopicAuthorColumn from "../components/card/topic-author-column";
+import TopicActivityColumn from "../components/card/topic-activity-column";
 import TopicCategoryColumn from "../components/card/topic-category-column";
+import TopicCreatorColumn from "../components/card/topic-creator-column";
 import TopicLikesColumn from "../components/card/topic-likes-column";
 import TopicRepliesColumn from "../components/card/topic-replies-column";
 import TopicStatusColumn from "../components/card/topic-status-column";
 
-const TopicAuthor = <template>
-  <td class="topic-author-data">
-    <TopicAuthorColumn @topic={{@topic}} />
+const TopicActivity = <template>
+  <td class="topic-activity-data">
+    <TopicActivityColumn @topic={{@topic}} />
   </td>
 </template>;
 
-const TopicAuthorAvatar = <template>
-  <td class="topic-author-avatar-data">
-    <TopicAuthorAvatarColumn @topic={{@topic}} />
-  </td>
-</template>;
-
-const TopicCategoryStatus = <template>
-  <td class="topic-category-status-data">
-    <TopicCategoryColumn @topic={{@topic}} />
+const TopicStatus = <template>
+  <td class="topic-status-data">
     <TopicStatusColumn @topic={{@topic}} />
   </td>
 </template>;
 
+const TopicCategory = <template>
+  <td class="topic-category-data">
+    <TopicCategoryColumn @topic={{@topic}} />
+  </td>
+</template>;
+
 const TopicLikesReplies = <template>
   <td class="topic-likes-replies-data">
     <TopicLikesColumn @topic={{@topic}} />
@@ -32,33 +31,48 @@ const TopicLikesReplies = <template>
   </td>
 </template>;
 
+const TopicCreator = <template>
+  <td class="topic-creator-data">
+    <TopicCreatorColumn @topic={{@topic}} />
+  </td>
+</template>;
+
 export default {
   name: "topic-list-customizations",
 
-  initialize() {
+  initialize(container) {
+    const router = container.lookup("service:router");
     withPluginApi("1.39.0", (api) => {
       api.registerValueTransformer(
         "topic-list-columns",
         ({ value: columns }) => {
-          columns.add("topic-author", {
-            item: TopicAuthor,
-            after: "activity",
-          });
-          columns.add("topic-category-status", {
-            item: TopicCategoryStatus,
+          columns.add("topic-status", {
+            item: TopicStatus,
             after: "topic-author",
           });
-          columns.add("topic-author-avatar", {
-            item: TopicAuthorAvatar,
-            after: "topic-category-status",
+          columns.add("topic-category", {
+            item: TopicCategory,
+            after: "topic-status",
           });
+
           columns.add("topic-likes-replies", {
             item: TopicLikesReplies,
             after: "topic-author-avatar",
           });
-          columns.delete("posters");
+          columns.add("topic-creator", {
+            item: TopicCreator,
+            after: "topic-author-avatar",
+          });
           columns.delete("views");
           columns.delete("replies");
+          if (!router.currentRouteName.includes("userPrivateMessages")) {
+            columns.add("topic-activity", {
+              item: TopicActivity,
+              after: "title",
+            });
+            columns.delete("posters");
+            columns.delete("activity");
+          }
           return columns;
         }
       );
@@ -66,8 +80,12 @@ export default {
       api.registerValueTransformer(
         "topic-list-item-class",
         ({ value: classes, context }) => {
-          if (context.topic.pinned || context.topic.pinned_globally) {
-            classes.push("--pinned");
+          if (
+            context.topic.is_hot ||
+            context.topic.pinned ||
+            context.topic.pinned_globally
+          ) {
+            classes.push("--has-status-card");
           }
           return classes;
         }
@@ -76,6 +94,34 @@ export default {
       api.registerValueTransformer("topic-list-item-mobile-layout", () => {
         return false;
       });
+
+      api.registerBehaviorTransformer(
+        "topic-list-item-click",
+        ({ context: { event }, next }) => {
+          if (event.target.closest("a, button, input")) {
+            return next();
+          }
+
+          event.preventDefault();
+          event.stopPropagation();
+
+          const topicLink = event.target
+            .closest("tr")
+            .querySelector("a.raw-topic-link");
+
+          // Redespatch the click on the topic link, so that all key-handing is sorted
+          topicLink.dispatchEvent(
+            new MouseEvent("click", {
+              ctrlKey: event.ctrlKey,
+              metaKey: event.metaKey,
+              shiftKey: event.shiftKey,
+              button: event.button,
+              bubbles: true,
+              cancelable: true,
+            })
+          );
+        }
+      );
     });
   },
 };

javascripts/discourse/services/custom-color.gjs

@@ -1,18 +0,0 @@
-import { tracked } from "@glimmer/tracking";
-import { action } from "@ember/object";
-import Service, { service } from "@ember/service";
-import { DEFAULT_PALETTE_NAME } from "../components/custom-user-palette";
-
-const CUSTOM_COLOR_KEY = "d-custom-color-preference";
-
-export default class CustomColor extends Service {
-  @service keyValueStore;
-  @tracked
-  color = this.keyValueStore.getItem(CUSTOM_COLOR_KEY) || DEFAULT_PALETTE_NAME;
-
-  @action
-  setColor(color) {
-    this.color = color;
-    this.keyValueStore.setItem(CUSTOM_COLOR_KEY, color);
-  }
-}

locales/en.yml

@@ -1,12 +1,8 @@
 en:
   theme_metadata:
     description: "A simple, beautiful theme that improves the out of the box experience for Discourse sites."
-  topic_bookmarked: "Bookmarked"
-  topic_closed_archived: "Closed and archived"
-  topic_closed: "Closed"
-  topic_archived: "Archived"
-  topic_warning: "Warning"
-  topic_personal_message: "Personal message"
   topic_pinned: "Pinned"
-  topic_unpinned: "Unpinned"
   topic_hot: "Hot"
+  user_replied: "replied"
+  user_posted: "posted"
+  user_updated: "updated"

package.json

@@ -1,13 +1,14 @@
 {
   "private": true,
   "devDependencies": {
-    "@discourse/lint-configs": "2.4.0",
-    "ember-template-lint": "6.1.0",
-    "eslint": "9.19.0",
-    "prettier": "2.8.8"
+    "@discourse/lint-configs": "2.25.0",
+    "ember-template-lint": "7.8.1",
+    "eslint": "9.28.0",
+    "prettier": "3.5.3",
+    "stylelint": "16.20.0"
   },
   "engines": {
-    "node": ">= 18",
+    "node": ">= 22",
     "npm": "please-use-pnpm",
     "yarn": "please-use-pnpm",
     "pnpm": "9.x"

scss/box-view.scss

@@ -1,4 +1,6 @@
-@media screen and (min-width: 1300px) {
+@use "lib/viewport";
+
+@media screen and (width >= 1300px) {
   #main-outlet {
     border-top-right-radius: var(--d-border-radius-large);
     border-top-left-radius: var(--d-border-radius-large);
@@ -18,38 +20,47 @@
 }
 
 .has-full-page-chat .chat-replying-indicator-container {
-  margin-bottom: var(--d-border-radius-large);
-  @include breakpoint(medium) {
+  margin-bottom: var(--main-grid-gap);
+
+  @include viewport.until(lg) {
     margin-bottom: 0;
   }
 }
 
 .has-full-page-chat .chat-selection-management {
-  margin-bottom: var(--d-border-radius-large);
-  @include breakpoint(medium) {
+  margin-bottom: var(--main-grid-gap);
+
+  @include viewport.until(lg) {
     margin-bottom: 0;
   }
 }
 
 .experimental-screen {
-  @include breakpoint(medium) {
-    display: none;
-  }
   max-width: unset !important;
-  @media screen and (max-width: 488px) {
-    display: none;
-  }
   width: 100%;
   display: block;
   margin: 0;
   padding: 0;
   position: relative;
-  container: content-width / inline-size;
+
+  @include viewport.until(lg) {
+    display: none;
+  }
+
+  @media screen and (width <= 488px) {
+    display: none;
+  }
+
+  @include viewport.until(md) {
+    display: none;
+  }
+
   li {
     list-style: none;
     margin: 0;
     padding: 0;
   }
+
   &__top-left,
   &__top-right,
   &__bottom-left,
@@ -59,38 +70,45 @@
     height: var(--d-border-radius-large);
     background-color: var(--background-color);
     z-index: 399;
-    -webkit-mask: radial-gradient(
+    mask: radial-gradient(
       circle at var(--d-border-radius-large) var(--d-border-radius-large),
       transparent var(--d-border-radius-large),
       transparent var(--d-border-radius-large),
       black var(--d-border-radius-large)
     );
   }
+
   &__top-left {
     top: var(--header-offset);
     left: var(--left-distance);
   }
+
   &__top-right {
     top: var(--header-offset);
     transform: rotate(90deg);
     left: calc(var(--right-distance) - var(--d-border-radius-large));
   }
+
   &__bottom-left {
     transform: rotate(-90deg);
-    bottom: var(--d-border-radius-large);
+    bottom: var(--main-grid-gap);
     left: var(--left-distance);
-    @media screen and (max-width: 768px) {
+
+    @media screen and (width <= 768px) {
       bottom: calc(var(--d-border-radius-large) * 2);
     }
   }
+
   &__bottom-right {
     transform: rotate(180deg);
-    bottom: var(--d-border-radius-large);
+    bottom: var(--main-grid-gap);
     left: calc(var(--right-distance) - var(--d-border-radius-large));
-    @media screen and (max-width: 768px) {
+
+    @media screen and (width <= 768px) {
       bottom: calc(var(--d-border-radius-large) * 2);
     }
   }
+
   &__bottom-bar {
     position: fixed;
     width: 100%;
@@ -98,17 +116,49 @@
     background-color: var(--background-color);
     bottom: 0;
     left: var(--left-distance);
-    height: var(--d-border-radius-large);
-    @media screen and (max-width: 768px) {
+    height: var(--main-grid-gap);
+
+    @media screen and (width <= 768px) {
       height: calc(var(--d-border-radius-large) * 2);
     }
+
     @container content-width (width > 1px) {
       width: 100cqw;
     }
   }
 }
 
-@media screen and (min-width: 768px) {
+.rtl .experimental-screen {
+  &__top-left {
+    right: var(--left-distance);
+    left: unset;
+  }
+
+  &__top-right {
+    transform: rotate(-90deg) !important;
+    right: calc(var(--right-distance) - var(--d-border-radius-large));
+    left: unset;
+  }
+
+  &__bottom-left {
+    transform: rotate(90deg);
+    right: var(--left-distance);
+    left: unset;
+  }
+
+  &__bottom-right {
+    transform: rotate(180deg);
+    left: unset;
+    right: calc(var(--right-distance) - var(--d-border-radius-large));
+  }
+
+  &__bottom-bar {
+    right: var(--left-distance);
+    left: unset;
+  }
+}
+
+@media screen and (width >= 768px) {
   .with-topic-progress {
     bottom: calc(
       env(safe-area-inset-bottom) + var(--composer-height, 0px) +
@@ -117,7 +167,7 @@
   }
 }
 
-@media screen and (max-width: 768px) {
+@media screen and (width <= 768px) {
   .with-topic-progress {
     bottom: calc(
       env(safe-area-inset-bottom) + var(--composer-height, 0px) +
@@ -126,7 +176,7 @@
   }
 }
 
-@media screen and (max-width: 400px) {
+@media screen and (width <= 400px) {
   .with-topic-progress {
     bottom: calc(env(safe-area-inset-bottom) + var(--composer-height, 0px));
   }

scss/buttons.scss

@@ -8,11 +8,13 @@
 
 .sidebar-new-topic-button__wrapper .topic-drafts-menu-trigger.btn.no-text {
   background: var(--accent-color);
+
   &:hover,
   &:focus-visible {
     background: oklch(from var(--accent-color) 40% c h) !important;
     box-shadow: none;
   }
+
   .d-icon {
     color: var(--accent-text-color);
   }
@@ -26,31 +28,37 @@
 .discourse-no-touch .btn-default,
 .discourse-no-touch .select-kit .select-kit-header.btn-default {
   background: var(--primary-100);
+
   .d-icon {
     color: var(--accent-color);
   }
 
   &:hover {
     border-color: transparent;
-    box-shadow: 0px 0px 8px 1px var(--button-box-shadow);
+    box-shadow: 0 0 8px 1px var(--button-box-shadow);
     background: var(--d-content-background);
     color: var(--accent-color);
+
     .d-icon {
       color: var(--accent-color);
     }
   }
+
   &:focus-visible {
     background: var(--d-content-background);
     color: var(--accent-color);
-    box-shadow: 0px 0px 0px 3px var(--button-box-shadow);
+    box-shadow: 0 0 0 3px var(--button-box-shadow);
+
     .d-icon {
       color: var(--accent-color);
     }
   }
+
   &:active:not(:hover, :focus) {
     color: var(--primary);
     background: var(--tertiary-300);
     background-image: none;
+
     .d-icon {
       color: var(--tertiary-high);
     }
@@ -58,30 +66,45 @@
 }
 
 .btn-primary,
-#create-topic.btn {
+#create-topic.btn,
+.discourse-no-touch .btn-default.ai-new-question-button {
   background-color: var(--accent-color);
   color: var(--accent-text-color);
+
   .d-icon {
     color: var(--accent-text-color);
   }
+
   &:hover {
     .discourse-no-touch & {
-      background: oklch(from var(--accent-color) 40% c h) !important;
-      box-shadow: 0px 0px 6px 1px var(--button-box-shadow);
+      background: light-dark(
+        oklch(from var(--accent-color) 40% c h),
+        oklch(from var(--accent-color) 50% c h)
+      );
+      box-shadow: 0 0 6px 1px var(--button-box-shadow);
       color: var(--accent-text-color);
+
       .d-icon {
         color: var(--accent-text-color);
       }
     }
   }
+
   &:focus-visible {
     .discourse-no-touch & {
-      background: oklch(from var(--accent-color) 40% c h) !important;
-      box-shadow: 0px 0px 0px 4px var(--button-box-shadow);
+      background: light-dark(
+        oklch(from var(--accent-color) 40% c h),
+        oklch(from var(--accent-color) 50% c h)
+      );
+      box-shadow: 0 0 0 4px var(--button-box-shadow);
       color: var(--accent-text-color);
     }
   }
+
   &:active {
-    background: oklch(from var(--accent-color) 30% c h) !important;
+    background: light-dark(
+      oklch(from var(--accent-color) 40% c h),
+      oklch(from var(--accent-color) 50% c h)
+    );
   }
 }

scss/chat.scss

@@ -1,9 +1,13 @@
+@use "lib/viewport";
+
 .full-page-chat.full-page-chat-sidebar-enabled {
   border: none;
 }
 
 .c-navbar-container {
-  padding: 0 1.5em;
+  .full-page-chat & {
+    padding: 0 1.5em;
+  }
   background-color: var(--d-content-background);
 }
 
@@ -13,22 +17,43 @@ body.has-full-page-chat {
 
 .chat-drawer-container {
   .is-expanded & {
-    box-shadow: 0px 0px 0px 2px var(--d-chat-border);
+    box-shadow: 0 0 0 2px var(--tertiary-medium);
   }
+
   .chat-drawer.is-expanded & {
     border: none;
   }
+
+  .c-navbar__title {
+    padding-left: 0.33em; // visual alignment for chat index, which does not havea a backarrow
+  }
 }
 
 .chat-drawer-outlet-container {
   z-index: z("composer", "content");
+
+  .peek-mode-active & {
+    padding-bottom: 0;
+    left: unset;
+    right: var(--main-grid-gap);
+
+    &:has(.is-expanded) {
+      z-index: calc(z("composer", "dropdown") + 1);
+    }
+  }
+}
+
+.chat-drawer {
+  .peek-mode-active & {
+    max-width: 90vw;
+  }
 }
 
 .chat-drawer .channels-list-container .chat-channel-row {
   margin-bottom: var(--spacing-block-xs);
   font-size: var(--font-up-1);
-  border-radius: var(--d-border-radius);
   border-bottom: none;
+
   &:hover {
     background-color: var(--d-sidebar-active-background);
   }
@@ -51,3 +76,13 @@ body.has-full-page-chat {
     color: var(--primary);
   }
 }
+
+.chat-drawer-active.chat-drawer-expanded .chat-composer-dropdown__menu-content {
+  z-index: z("modal", "dialog");
+}
+
+.chat-replying-indicator-container {
+  @include viewport.from(sm) {
+    margin-left: calc(0.65em + 0.2rem);
+  }
+}

scss/color-choice.scss

@@ -1,20 +1,24 @@
-.color-palette-menu {
+.user-color-palette-menu {
   &__item .btn-icon-text.btn-flat {
     background-color: var(--d-content-background);
     width: 100%;
     justify-content: flex-start;
   }
+
   &__item .btn-icon-text.btn-flat:hover {
     background-color: var(--d-selected);
     box-shadow: none;
     color: var(--primary);
   }
+
   &__item .btn-icon-text.btn-flat:hover svg {
     color: var(--icon-color);
   }
+
   &__item .btn-icon-text.btn-flat svg {
     color: var(--icon-color);
   }
+
   &__item-choice.active.btn-icon-text.btn-flat {
     background-color: var(--d-selected);
   }
@@ -23,27 +27,3 @@
 .user-color-palette-content .fk-d-menu__inner-content {
   border: none;
 }
-
-html.custom-color-horizon {
-  --accent-base-color: #595bca;
-}
-
-html.custom-color-marigold {
-  --accent-base-color: #d3881f;
-}
-
-html.custom-color-violet {
-  --accent-base-color: #9b15de;
-}
-
-html.custom-color-lily {
-  --accent-base-color: #cc338c;
-}
-
-html.custom-color-clover {
-  --accent-base-color: #45a06e;
-}
-
-html.custom-color-royal {
-  --accent-base-color: #4169e1;
-}

scss/color-exploration.scss

@@ -1,108 +1,12 @@
 :root {
-  --accent-base-color: #595bca;
-  --accent-color: light-dark(
-    var(--accent-base-color),
-    oklch(from var(--accent-base-color) calc(l * 0.95) c h)
-  );
-  //   --background-color: light-dark(#f5f8ff, #101112);
-  --background-color: light-dark(
-    oklch(from var(--accent-color) 98% calc(c * 0.25) h),
-    oklch(from var(--accent-color) 10% 0.025 h)
-  );
-  --header_primary-low-mid: light-dark(
-    oklch(from var(--background-color) calc(l * 0.75) calc(c * 2) h),
-    oklch(from var(--accent-color) calc(l * 1) calc(c * 0.25) h)
-  );
-  --header_primary-medium: light-dark(
-    oklch(from var(--background-color) calc(l * 0.55) calc(c * 2) h),
-    oklch(from var(--accent-color) calc(l * 1.35) calc(c * 0.25) h)
-  );
-  --d-content-background: light-dark(
-    oklch(from var(--accent-color) calc(l * 2) 0 h),
-    oklch(from var(--accent-color) calc(l * 0.375) 0 h)
-  );
-  --primary-100: light-dark(#f2f2f2, #333333);
-  --primary-300: light-dark(#d1d1d1, #838383);
-  --primary-low: light-dark(#e9e9e9, #313131);
-  --primary-high: light-dark(#646464, #a6a6a6);
-  --primary-very-high: light-dark(#434343, #c7c7c7);
-  --d-hover: oklch(from var(--d-selected) l c h / 0.75);
-  --tertiary: var(--accent-color);
-  --tertiary-medium: light-dark(
-    oklch(from var(--accent-color) calc(l * 1.25) calc(c * 0.25) h),
-    oklch(from var(--accent-color) calc(l * 0.75) calc(c * 0.25) h)
-  );
-  --tertiary-very-low: light-dark(
-    oklch(from var(--accent-color) calc(l * 1.75) calc(c * 0.25) h),
-    oklch(from var(--accent-color) calc(l * 0.5) calc(c * 0.25) h)
-  );
-  --tertiary-med-or-tertiary: var(--accent-color);
-  --tertiary-low: light-dark(
-    oklch(from var(--accent-color) calc(l * 1.6) calc(c * 0.25) h),
-    oklch(from var(--accent-color) calc(l * 0.6) calc(c * 0.25) h)
-  );
-  --tertiary-300: light-dark(
-    oklch(from var(--accent-color) calc(l * 1.5) calc(c * 2) h),
-    oklch(from var(--accent-color) calc(l * 0.65) calc(c * 0.65) h)
-  );
-  --tertiary-high: light-dark(
-    oklch(from var(--accent-color) calc(l * 1) c h),
-    oklch(from var(--accent-color) calc(l * 1) c h)
-  );
   --d-sidebar-highlight-hover-icon: var(--d-sidebar-link-color);
-  --search-color: light-dark(
-    oklch(from var(--accent-color) calc(l * 0.65) calc(c * 0.65) h),
-    oklch(from var(--accent-color) calc(l * 1.5) calc(c * 2) h)
-  );
-  --search-banner-text-color: light-dark(
-    oklch(from var(--accent-color) calc(l * 0.65) calc(c * 0.65) h),
-    oklch(from var(--accent-color) calc(l * 1.85) calc(c * 2) h)
-  );
-  --topic-card-shadow: light-dark(
-    oklch(from var(--accent-color) calc(l * 1.85) calc(c * 0.5) h),
-    oklch(from var(--accent-color) calc(l * 0.2) calc(c * 0.01) h / 0.25)
-  );
-  --button-box-shadow: light-dark(
-    oklch(from var(--accent-color) calc(l * 1.5) calc(c * 0.35) h),
-    oklch(from var(--accent-color) calc(l * 0.75) calc(c * 0.5) h)
-  );
-  --d-selected: light-dark(
-    oklch(from var(--background-color) calc(l * 0.9375) calc(c * 2) h),
-    oklch(from var(--accent-color) calc(l * 0.7) calc(c * 0.25) h)
-  );
   --d-sidebar-highlight-hover-background: var(--d-selected);
-  --d-sidebar-border-color: light-dark(
-    oklch(from var(--background-color) calc(l * 0.9) calc(c * 1) h),
-    oklch(from var(--accent-color) calc(l * 0.7) calc(c * 0.25) h)
-  );
-  --d-chat-border: light-dark(
-    oklch(from var(--accent-color) calc(l * 1.25) calc(c * 0.25) h),
-    oklch(from var(--accent-color) calc(l * 0.25) calc(c * 0.25) h)
-  );
-  --accent-text-color: light-dark(#ffffff, #212121);
-  --d-nav-color--active: var(--accent-color);
-  --d-sidebar-background: var(--background-color);
-  --d-sidebar-footer-fade: rgba(var(--tertiary-50-rgb), 1);
-  --d-sidebar-link-color: light-dark(
-    oklch(from var(--accent-color) calc(l * 0.8) calc(c * 0.25) h),
-    oklch(from var(--accent-color) calc(l * 1.5) calc(c * 0.25) h)
-  );
   --d-sidebar-link-icon-color: var(--d-sidebar-link-color);
   --d-sidebar-header-color: var(--d-sidebar-link-color);
   --d-sidebar-header-icon-color: var(--d-sidebar-link-color);
-  --d-sidebar-suffix-color: light-dark(
-    oklch(from var(--accent-base-color) calc(l * 1) calc(c * 0.9) h),
-    oklch(from var(--accent-base-color) calc(l * 1) calc(c * 0.9) h)
-  );
   --d-sidebar-active-suffix-color: var(--d-sidebar-suffix-color);
-  --link-color: light-dark(
-    var(--accent-base-color),
-    oklch(from var(--accent-base-color) calc(l * 0.95) c h)
-  );
-  --link-color-hover: light-dark(
-    var(--accent-base-color),
-    oklch(from var(--accent-base-color) calc(l * 1.5) calc(c * 2.25) h)
-  );
+  --d-sidebar-background: var(--background-color);
+  --d-sidebar-footer-fade: rgb(var(--tertiary-50-rgb), 1);
   --d-sidebar-prefix-background: var(--d-selected);
   --d-sidebar-active-prefix-background: light-dark(
     oklch(from var(--d-selected) calc(l * 0.85) c h),
@@ -116,6 +20,7 @@
   --d-sidebar-highlight-color: var(--primary);
   --d-sidebar-highlight-background: var(--d-selected);
   --d-sidebar-section-link-icon-size: 1em;
+  --d-hover: oklch(from var(--d-selected) l c h / 0.75);
   --d-input-bg-color: var(--d-content-background);
-  --tertiary-hover: var(--accent-color);
+  --d-sidebar-active-color: var(--primary) !important;
 }

scss/composer-peek-mode.scss

@@ -0,0 +1,65 @@
+.peek-mode-toggle {
+  display: none;
+}
+
+@media screen and (width >= 1300px) {
+  html:not(.fullscreen-composer) {
+    .peek-mode-toggle svg {
+      transform: scaleX(-1);
+    }
+
+    &.composer-open {
+      .full-width-enabled .peek-mode-toggle {
+        display: flex;
+      }
+
+      .full-width-enabled.peek-mode-active {
+        #reply-control.hide-preview {
+          transition: none;
+          box-shadow: none;
+          border-radius: var(--d-border-radius-large);
+
+          .grippie {
+            display: none;
+          }
+
+          .reply-area {
+            padding-inline: 0.67em;
+          }
+        }
+
+        #reply-control:not(.fullscreen).hide-preview {
+          width: 100%;
+          right: var(--main-grid-gap);
+          top: var(--header-offset);
+          bottom: var(--main-grid-gap);
+          left: unset;
+          height: unset;
+          max-width: 36.5vw;
+        }
+
+        &.has-sidebar-page {
+          #main-outlet-wrapper {
+            grid-template-columns:
+              var(--d-sidebar-width) calc(100vw - 38vw - var(--d-sidebar-width))
+              1fr;
+          }
+        }
+
+        &:not(.has-sidebar-page) {
+          #main-outlet-wrapper {
+            grid-template-columns: 0 calc(100vw - 52vw) 1fr;
+          }
+
+          #reply-control:not(.fullscreen).hide-preview {
+            max-width: 46vw;
+          }
+        }
+
+        .sidebar-wrapper .sidebar-container {
+          height: unset;
+        }
+      }
+    }
+  }
+}

scss/composer.scss

@@ -1,14 +1,70 @@
+@use "lib/viewport";
+
 #reply-control
   .select-kit.dropdown-select-box.composer-actions
   .select-kit-header {
   border: 1px solid var(--tertiary-700);
   background: var(--secondary);
+
   &:hover {
     .d-icon {
       color: var(--accent-color);
     }
   }
 }
+
+#reply-control.hide-preview:not(.draft) {
+  @include viewport.from(sm) {
+    background: var(--d-content-background);
+    border-top-right-radius: var(--d-border-radius);
+    border-top-left-radius: var(--d-border-radius);
+
+    .grippie {
+      background: var(--tertiary-low);
+      border-top-right-radius: var(--d-border-radius);
+      border-top-left-radius: var(--d-border-radius);
+    }
+
+    .user-selector,
+    .title-and-category {
+      padding: 0 var(--spacing-inline-m);
+      width: calc(100% - var(--spacing-inline-m) * 2);
+    }
+
+    .d-editor-button-bar {
+      padding: 3px var(--spacing-inline-m);
+      border: none;
+    }
+
+    .d-editor-input {
+      padding: var(--spacing-inline-m);
+    }
+
+    &:has(.in-focus) .grippie {
+      background: var(--tertiary);
+    }
+
+    .reply-area {
+      padding-inline: 0;
+    }
+
+    .reply-to,
+    .submit-panel {
+      padding-inline: var(--spacing-inline-sm);
+    }
+
+    .d-editor-textarea-wrapper {
+      border: 0;
+      border-bottom: 1px solid var(--primary-low);
+      border-radius: 0;
+
+      &.in-focus {
+        outline: 0;
+      }
+    }
+  }
+}
+
 .d-editor-button-bar {
   .btn:hover,
   .toolbar-popup-menu-options.is-expanded {
@@ -20,11 +76,12 @@
         color: inherit;
       }
 
-      //to have parity with regular select-kit styling used elsewhere
+      // to have parity with regular select-kit styling used elsewhere
       .select-kit-row {
         .d-icon {
           color: var(--primary-high);
         }
+
         &:hover {
           .d-icon {
             color: var(--primary);
@@ -38,3 +95,27 @@
     border-radius: var(--d-border-radius);
   }
 }
+
+.discourse-no-touch .translation-selector-dropdown {
+  .select-kit-header.btn-default {
+    background: var(--background-color);
+  }
+}
+
+#reply-control.composer-action-add_translation {
+  .d-editor-preview .d-editor-translation-preview-wrapper {
+    border-color: var(--d-sidebar-border-color);
+  }
+
+  .d-editor-preview .d-editor-translation-preview-wrapper__header {
+    top: 6.5rem;
+    padding: 0.25rem 0.75rem;
+    background: var(--background-color);
+    color: var(--accent-color);
+    border-radius: var(--d-border-radius-large);
+  }
+
+  .topic-title-translator input {
+    width: 47.25vw;
+  }
+}

scss/desktop-full-width.scss

@@ -0,0 +1,276 @@
+@use "lib/viewport";
+
+// Full width layout. Ported from the Discourse Full Width theme component here
+// https://meta.discourse.org/t/discourse-full-width-component/292496, which we
+// intend to move into core over time.
+//
+// We are copying this here so we can continue to iterate on Horizon with full
+// width without having to include the theme component as a dependency, we
+// need to remove this once full width is in core.
+
+$sidebar-width: 17em;
+
+.wrap {
+  max-width: unset; // undoing core default
+}
+
+.d-header #site-logo {
+  // this prevents the logo from shifting header content
+  // when the sidebar is opened
+  max-height: 100%;
+  max-width: 100%;
+  object-fit: contain; // contains logo without squishing/stretching
+
+  // allows some flexibility for wide logos
+  body:not(.has-sidebar-page) & {
+    max-width: unset;
+
+    @include viewport.until(sm) {
+      max-width: 25vw;
+    }
+  }
+}
+
+.d-header #site-text-logo {
+  font-size: clamp(var(--font-0), 2.5vw, var(--font-up-2));
+
+  .has-sidebar-page & {
+    white-space: wrap;
+    line-height: var(--line-height-medium);
+
+    @include line-clamp(2);
+  }
+}
+
+#main-outlet-wrapper {
+  padding: 0;
+
+  body.has-sidebar-page & {
+    .sidebar-wrapper {
+      width: var(--d-sidebar-width);
+    }
+  }
+
+  body.has-full-page-chat & {
+    gap: 0;
+  }
+
+  .sidebar-wrapper {
+    width: 100%; // safari has issues without this
+  }
+
+  #main-outlet {
+    margin: 0 auto;
+    max-width: var(--d-max-width);
+    width: 100%;
+
+    body.has-full-page-chat & {
+      max-width: unset;
+    }
+  }
+}
+
+.has-full-page-chat:not(.discourse-sidebar) .full-page-chat {
+  border: none;
+}
+
+#main-outlet > .regular {
+  max-width: var(--d-max-width);
+  margin: 0 auto;
+
+  body.has-sidebar-page & {
+    margin: 0 auto;
+  }
+}
+
+.d-header .title:not(.title--minimized) {
+  // allowing overflow here isn't always ideal
+  // but works well enough most of the time
+  overflow: visible;
+}
+
+.d-header {
+  > .wrap {
+    .contents {
+      display: grid;
+      grid-template-areas: "logo lspace extra-info rspace panel";
+      grid-template-columns:
+        minmax(auto, 1fr)
+        auto
+        minmax(0, calc(var(--d-max-width)))
+        auto
+        minmax(auto, 1fr);
+
+      .d-header-mode {
+        grid-area: extra-info;
+        white-space: nowrap;
+
+        @include viewport.until(md) {
+          display: none;
+        }
+      }
+
+      .d-header .title {
+        min-width: auto;
+      }
+
+      .has-sidebar-page & {
+        // at wide widths, when 1fr > 0
+        // we want the panel to be the same width as the sidebar
+        // this way we can get more accurate centering
+        grid-template-columns:
+          calc(var(--d-sidebar-width) - 11px) // 11px is wrap padding
+          1fr
+          minmax(0, calc(var(--d-max-width)))
+          1fr
+          minmax(0, calc(var(--d-sidebar-width) - 11px));
+        gap: 1em;
+
+        // at narrower widths, when 1fr = 0
+        // we can center without matching the sidebar's width
+        // which allows the title to take up the remaining width
+        @media screen and (width <= 1400px) {
+          grid-template-columns:
+            calc(var(--d-sidebar-width) - 11px)
+            1fr
+            minmax(0, calc(var(--d-max-width)))
+            1fr
+            auto;
+        }
+
+        @media screen and (width <= 1000px) {
+          gap: 0.5em;
+        }
+
+        .d-header-mode {
+          grid-area: extra-info;
+        }
+      }
+    }
+  }
+
+  .header-sidebar-toggle {
+    grid-area: logo;
+  }
+
+  .before-header-panel-outlet {
+    grid-area: extra-info;
+  }
+
+  .d-header-mode {
+    .bootstrap-mode {
+      display: none;
+    }
+  }
+
+  .home-logo-wrapper-outlet {
+    grid-area: logo;
+    margin-left: 3.7em; // 2.7em hamburger width + 1em for margin
+    margin-right: 0.725em;
+    display: flex;
+    overflow: visible;
+
+    .title {
+      flex: 1 1 auto;
+    }
+  }
+
+  .panel {
+    grid-area: panel;
+  }
+}
+
+.extra-info-wrapper {
+  grid-area: extra-info;
+  max-width: var(--d-max-width);
+  width: 100%;
+  box-sizing: border-box;
+  padding: 0;
+}
+
+.header-search--enabled .floating-search-input-wrapper {
+  grid-area: extra-info;
+
+  @include viewport.until(md) {
+    grid-area: rspace;
+  }
+
+  @include viewport.until(sm) {
+    display: none;
+  }
+}
+
+body.has-sidebar-page {
+  .wrap {
+    max-width: unset; // undoing core default
+  }
+
+  .d-header-mode,
+  .extra-info-wrapper {
+    padding: 0;
+  }
+
+  @media screen and (width >= calc($reply-area-max-width + ($sidebar-width * 2))) {
+    #reply-control.show-preview {
+      margin-left: auto;
+      margin-right: auto;
+    }
+
+    .sidebar-container {
+      height: auto;
+    }
+  }
+
+  @media screen and (width <= calc($reply-area-max-width + ($sidebar-width * 2))) and (width >= calc($reply-area-max-width + calc($sidebar-width / 2))) {
+    #reply-control.show-preview:not(.fullscreen) {
+      margin-left: $sidebar-width;
+      width: auto;
+
+      // overruling new core composer changes
+      max-width: $reply-area-max-width;
+      transform: none;
+    }
+
+    .sidebar-container {
+      height: auto;
+    }
+  }
+
+  // overruling new core composer changes
+  @media screen and (min-width: $reply-area-max-width) {
+    #reply-control.show-preview:not(.fullscreen) {
+      max-width: $reply-area-max-width;
+      transform: none;
+    }
+  }
+}
+
+body.sidebar-animate {
+  #main-outlet-wrapper {
+    transition: none;
+  }
+
+  .d-header-wrap .wrap {
+    transition: none;
+  }
+}
+
+.d-header-icons {
+  display: flex;
+}
+
+.rtl {
+  .d-header .title {
+    margin-right: 3.7em; // 2.7em hamburger width + 1em for margin
+    margin-left: 0.725em;
+  }
+}
+
+// provides some extra space for login buttons
+@media screen and (width >= 1400px) {
+  .anon {
+    .d-header .panel {
+      grid-column-start: -4;
+    }
+  }
+}

scss/desktop-horizon-fixes.scss

@@ -0,0 +1,65 @@
+// Fixing bulk select (only needed for desktop)
+.bulk-select-enabled {
+  .topic-list-header {
+    position: relative;
+    top: 0;
+  }
+
+  .topic-author-avatar-data {
+    display: none;
+  }
+
+  .bulk-select.topic-list-data {
+    grid-area: bulk-select;
+    margin-left: -0.5em;
+
+    @media screen and (width <= 576px) {
+      margin-top: 0;
+
+      label {
+        padding-block: 0.345em;
+      }
+    }
+
+    input {
+      transform: scale(1.5);
+    }
+  }
+}
+
+.topic-list-header {
+  tr {
+    border: none;
+  }
+
+  .topic-list-data {
+    padding: 0;
+
+    &:not(.default) {
+      display: none;
+    }
+
+    &.default {
+      .bulk-select,
+      span:not(.bulk-select-topics, .d-button-label) {
+        display: none;
+      }
+    }
+  }
+
+  // bulk select
+  .bulk-select-topics {
+    position: absolute;
+    right: 0;
+    background: var(--secondary);
+    border-radius: 0 0 0 var(--d-border-radius);
+    display: flex;
+    gap: 0.5rem;
+    margin: 0.5rem;
+
+    button {
+      white-space: nowrap;
+      margin: 0;
+    }
+  }
+}

scss/header.scss

@@ -1,13 +1,12 @@
+@use "lib/viewport";
+
 .d-header {
   box-shadow: none;
   background: var(--background-color);
-  @include breakpoint(extra-large, $rule: min-width) {
-    padding-bottom: 1em;
-  }
-}
 
-.has-full-page-chat .d-header {
-  background-color: transparent;
+  @include viewport.from(xl) {
+    padding-bottom: var(--main-grid-gap);
+  }
 }
 
 .user-menu .quick-access-panel,
@@ -44,15 +43,18 @@
   .d-header-icons
   .header-color-scheme-toggle
   .-expanded
-  > .d-icon {
+  > .d-icon,
+.discourse-no-touch .header-sidebar-toggle button:hover .d-icon {
   color: var(--header_primary-medium);
 }
 
 .discourse-no-touch .interface-color-selector-content {
   border: none;
   border-radius: var(--d-border-radius);
+
   .btn {
     border: none;
+
     &:hover {
       box-shadow: none;
     }
@@ -62,10 +64,6 @@
 .drop-down-mode .d-header-icons .active .icon,
 .drop-down-mode .d-header-icons .header-color-scheme-toggle .-expanded {
   border-color: transparent;
-}
-
-.drop-down-mode .d-header-icons .active .icon,
-.drop-down-mode .d-header-icons .header-color-scheme-toggle .-expanded {
   background-color: transparent;
 }
 
@@ -73,14 +71,6 @@
   color: var(--accent-text-color);
 }
 
-.user-menu .quick-access-panel li,
-.user-notifications-list li,
-.user-menu .quick-access-panel li.do-not-disturb,
-.menu-panel .panel-body-bottom .btn,
-.menu-panel .panel-body-bottom .btn:hover {
-  // background-color: var(--d-content-background);
-}
-
 body.login-page,
 body.signup-page,
 body.invite-page,
@@ -90,3 +80,11 @@ body.activate-account-page {
     background: var(--background-color);
   }
 }
+
+.header-dropdown-toggle.chat-header-icon .icon .chat-channel-unread-indicator {
+  border-color: var(--background-color);
+}
+
+.d-header-icons .badge-notification {
+  border-color: var(--background-color);
+}

scss/hiddenstuff.scss

@@ -3,7 +3,7 @@
 .notifications-button-footer .reason .text,
 .pinned-button .reason .text,
 .more-topics__browse-more,
-//footer-message might cause issues, not sure what possible stuff can be in there, but the general idea is to hide it bcs having an ugly H3 (what?) CTA at the bottom is just… ugly imo
+// footer-message might cause issues, not sure what possible stuff can be in there, but the general idea is to hide it bcs having an ugly H3 (what?) CTA at the bottom is just… ugly imo
 .footer-message {
   display: none;
 }

scss/login.scss

@@ -0,0 +1,15 @@
+body.static-login {
+  #main-outlet-wrapper {
+    grid-template-areas:
+      "sidebar blank"
+      "sidebar content"
+      "sidebar below-content";
+    grid-template-rows: auto 1fr auto;
+  }
+
+  .login-welcome {
+    border-radius: none;
+    border: none;
+    box-shadow: none;
+  }
+}

scss/main.scss

@@ -1,97 +1,106 @@
+@use "lib/viewport";
+
 :root {
-  --main-grid-gap: 2em;
+  --main-grid-gap: 0.5em;
 }
 
 html:not(:has(.has-full-page-chat)) {
   background-color: var(--background-color);
+
+  @include viewport.until(sm) {
+    background-color: var(--d-content-background);
+  }
 }
 
 body {
   -webkit-font-smoothing: antialiased;
+
+  @include viewport.until(sm) {
+    background-color: var(--d-content-background);
+  }
 }
+
 #main-outlet-wrapper {
   gap: var(--main-grid-gap);
 }
 
 body.has-sidebar-page.has-full-page-chat #main-outlet-wrapper {
   grid-column-gap: var(--main-grid-gap);
+  background-color: var(--background-color);
 }
 
 body.has-full-page-chat:not(.has-sidebar-page) {
   .d-header {
     background-color: var(--background-color);
   }
+
   #main-outlet-wrapper {
     gap: var(--main-grid-gap);
-    @include breakpoint(medium) {
+
+    @include viewport.until(lg) {
       gap: 0;
     }
   }
 }
 
 body.has-sidebar-page #main-outlet-wrapper {
-  grid-template-columns: var(--d-sidebar-width) minmax(0, 1fr) 0px;
+  grid-template-columns: var(--d-sidebar-width) minmax(0, 1fr) 0;
+
   #main-outlet {
     max-width: unset;
   }
 }
 
 body:not(.has-sidebar-page) #main-outlet-wrapper {
-  @include breakpoint(medium, $rule: min-width) {
-    grid-template-columns: 0px minmax(0, 1fr) 0px;
+  @include viewport.from(lg) {
+    grid-template-columns: 0 minmax(0, 1fr) 0;
   }
 }
 
-body:not(.has-full-page-chat) {
-  @include breakpoint(extra-large, $rule: min-width) {
+body:not(.has-full-page-chat, .wizard) {
+  @include viewport.from(xl) {
     background-color: var(--background-color);
   }
+
   #main-outlet-wrapper {
-    @include breakpoint(medium) {
+    @include viewport.until(lg) {
       --main-grid-gap: 0;
     }
-    @include breakpoint(tablet, $rule: min-width) {
+
+    @media screen and (width >= 768px) {
       gap: var(--main-grid-gap);
     }
+
     #main-outlet {
       width: 100%;
-      padding-bottom: var(--spacing-block-l);
       max-width: unset;
-      //thanks to random container elements on the page, I can't do a direct child selector here because it targets all the randomness, so I see no other option than MANUALLY adding every possible element that can appear in the main outlet YAY
-      .list-controls,
-      .list-container,
-      #topic-title,
-      .container.posts,
-      #topic-footer-buttons,
-      .more-topics__container,
-      .welcome-banner,
-      .container .user-main,
-      .reviewable,
-      .admin-content,
-      .discourse-post-event-upcoming-events,
-      .container.groups-index,
-      .body-page,
-      .container.badges,
-      .topic-above-footer-buttons-outlet .presence-users,
-      .global-notice {
-        @include breakpoint(medium, $rule: min-width) {
+      padding-bottom: var(--spacing-block-l);
+      border-radius: var(--d-border-radius-large);
+      background-color: var(--d-content-background);
+
+      @include viewport.until(lg) {
+        border-radius: 0;
+      }
+
+      html.composer-open & {
+        padding-bottom: var(--composer-height);
+      }
+
+      > *:not(.experimental-screen, .activate-account) {
+        @include viewport.from(lg) {
+          box-sizing: border-box;
           max-width: 1000px;
           margin-inline: auto;
           padding-inline: var(--spacing-inline-l);
         }
       }
-      border-radius: var(--d-border-radius-large);
-      @include breakpoint(medium) {
-        border-radius: 0px;
-      }
-      background-color: var(--d-content-background);
     }
   }
 }
 
 #list-area {
   .show-more.has-topics {
-    @include breakpoint(medium, $rule: min-width) {
+    @include viewport.from(lg) {
       width: auto;
       right: 50%;
       transform: translateX(50%);
@@ -103,6 +112,7 @@ body:not(.has-full-page-chat) {
       }
     }
   }
+
   .topic-list-body {
     padding-top: var(--spacing-block-m);
   }
@@ -117,3 +127,12 @@ aside.onebox {
   padding: 1em;
   background-color: var(--d-content-background);
 }
+
+.no-ember {
+  #main-outlet {
+    border-radius: var(--d-border-radius-large);
+    margin: 0 var(--main-grid-gap) var(--main-grid-gap) var(--main-grid-gap);
+    padding: 2em;
+    max-height: calc(100vh - 50px - 1em - var(--main-grid-gap));
+  }
+}

scss/misc.scss

@@ -1,3 +1,5 @@
+@use "lib/viewport";
+
 .user-main .about.collapsed-info .details {
   background: var(--d-content-background);
 }
@@ -8,7 +10,7 @@
 }
 
 .powered-by-discourse {
-  z-index: 9999;
+  z-index: 400;
 }
 
 .boxed.white {
@@ -40,10 +42,6 @@
   border-radius: 0;
 }
 
-.d-editor-button-bar {
-  padding: 3px;
-}
-
 .open .grippie {
   background-color: var(--accent-color);
 }
@@ -73,8 +71,11 @@ input[type="color"]:focus,
   background-color: var(--background-color);
 }
 
-.fk-d-menu__trigger.topic-list-layout-trigger {
-  display: none;
+@include viewport.until(sm) {
+  // pinned topic excerpts are hidden on small screens too
+  .fk-d-menu__trigger.topic-list-layout-trigger {
+    display: none;
+  }
 }
 
 .search-container .search-header,
@@ -86,7 +87,7 @@ input[type="color"]:focus,
 
 .user-main .about .details {
   padding: 1em 1em 0;
-  border-bottom: 0px;
+  border-bottom: 0;
   border-radius: var(--d-border-radius);
   background-color: var(--primary-50);
 }
@@ -98,3 +99,43 @@ input[type="color"]:focus,
 .discourse-reactions-list .reactions {
   gap: 0.15em;
 }
+
+.group-details-container {
+  border-radius: var(--d-border-radius);
+}
+
+.period-chooser-header {
+  border-radius: 0;
+}
+
+// compatibility with the top contributors sidebar theme component
+// https://meta.discourse.org/t/top-contributors-sidebar/215110
+.list-container
+  #list-area
+  > .contents
+  > .topic-list:has(.discourse-top-contributors) {
+  grid-template-areas: "head head" "body sidebar";
+  grid-template-rows: auto 1fr;
+
+  @include viewport.until(lg) {
+    grid-template-areas: "head head" "body body";
+  }
+
+  tbody {
+    display: flex;
+  }
+
+  .discourse-top-contributors {
+    width: auto;
+    box-sizing: border-box;
+
+    @include viewport.until(lg) {
+      display: none;
+    }
+
+    .top-contributors-heading {
+      font-size: var(--font-up-2);
+      padding-bottom: 0.5em;
+    }
+  }
+}

scss/mobile-stuff.scss

@@ -1,72 +1,93 @@
-//temp sepeate file to avoid merge hell… to be distributed later
-@include breakpoint(medium) {
+@use "lib/viewport";
+
+// temp separate file to avoid merge hell… to be distributed later
+@include viewport.until(lg) {
   html,
   .d-header {
-    background-color: var(--secondary);
+    background-color: var(--d-content-background);
   }
 }
+
 #main-outlet-wrapper {
   *[class*="navigation-"] & {
-    @include breakpoint(mobile-extra-large) {
+    @include viewport.until(sm) {
       padding: 0;
     }
   }
 }
+
 #main-outlet {
-  @include breakpoint(mobile-extra-large) {
+  @include viewport.until(sm) {
     padding-top: var(--spacing-block-sm);
   }
 
   .list-controls {
-    @include breakpoint(mobile-extra-large) {
+    @include viewport.until(sm) {
       padding-inline: var(
         --spacing-inline-m
-      ) !important; //override will be fixed when the whole chat page shenanigans is resolved
+      ) !important; // override will be fixed when the whole chat page shenanigans is resolved
       padding-block: var(--spacing-block-s);
       border-bottom: 1px solid var(--primary-200);
     }
+
     .navigation-container {
-      @include breakpoint(mobile-extra-large) {
+      @include viewport.until(sm) {
         gap: var(--spacing-inline-s);
-        //dont know why we even hide this crucial navigation on mobile
+
         .category-breadcrumb.hidden,
         .category-breadcrumb {
           display: flex !important;
-          column-gap: var(--spacing-inline-s);
+          column-gap: var(--spacing-inline-m);
           row-gap: var(--spacing-block-xs);
           flex-basis: 100%;
+
+          li {
+            margin-right: 0;
+            margin-left: calc(
+              (var(--spacing-block-s) - 2px) * -1
+            ); // 2px is width of the outline
+          }
+
+          .select-kit-header-wrapper {
+            gap: 0.25em;
+          }
+
           .select-kit-header {
-            padding-block: var(--spacing-block-s);
-            padding-inline: 0;
-            border: 0;
+            background: var(--d-content-background);
           }
         }
+
         .btn-default {
           border: 0;
           margin-right: 0;
+
           .d-icon {
             font-size: var(--font-up-1);
           }
         }
+
         .fk-d-button-tooltip {
           margin-right: 0;
           margin-left: var(
             --spacing-inline-xs
-          ); //pure visual correction for horitzontal alignment
+          ); // pure visual correction for horizontal alignment
+
           &:has(#create-topic) {
             order: 1;
           }
         }
       }
+
       #navigation-bar,
       .navigation-controls,
       .category-breadcrumb {
-        @include breakpoint(mobile-extra-large) {
+        @include viewport.until(sm) {
           margin-bottom: 0;
         }
       }
+
       .navigation-controls {
-        @include breakpoint(mobile-extra-large) {
+        @include viewport.until(sm) {
           gap: var(--spacing-inline-s);
         }
       }
@@ -74,42 +95,31 @@
   }
 
   .list-container {
-    @include breakpoint(mobile-extra-large) {
+    @include viewport.until(sm) {
       padding-inline: 0 !important;
     }
 
     .topic-list-body {
-      @include breakpoint(mobile-extra-large) {
+      @include viewport.until(sm) {
         border-top: 0;
         padding-top: 0;
       }
     }
-
-    .topic-list-item {
-      @include breakpoint(mobile-extra-large) {
-        box-shadow: none;
-        border-radius: 0;
-        //to be moved to topic card segment for general use
-        // .navigation-category & {
-        //   .badge-category__wrapper {
-        //     display: none;
-        //   }
-        // }
-      }
-    }
   }
 
   #topic-title {
-    @include breakpoint(mobile-extra-large) {
-      padding-inline: var(--spacing-inline-m) !important;
+    @include viewport.until(sm) {
+      padding-inline: var(--spacing-inline-s) !important;
 
       .title-wrapper {
         gap: var(--spacing-block-s);
       }
+
       .topic-category {
         order: -1;
       }
-      //make mixin of this
+
+      // make mixin of this
       .badge-category__wrapper {
         font-size: var(--font-down-2-rem);
         border-radius: var(--d-border-radius);
@@ -131,6 +141,15 @@
           oklch(from var(--category-badge-color) 100% calc(c * 0.9) h)
         );
       }
+
+      .discourse-tags {
+        gap: var(--spacing-inline-xs);
+
+        &__tag-separator {
+          display: none;
+        }
+      }
+
       .discourse-tag {
         font-size: var(--font-down-2-rem);
         padding: var(--spacing-inline-xs) var(--spacing-inline-s);
@@ -141,14 +160,14 @@
       }
     }
   }
+
   .container.posts {
-    @include breakpoint(mobile-extra-large) {
+    @include viewport.until(sm) {
       padding-inline: var(--spacing-inline-xs) !important;
 
       .main-avatar .avatar {
         width: 40px;
         height: 40px;
-        border-radius: var(--d-border-radius);
       }
 
       .topic-body {
@@ -157,18 +176,22 @@
             font-size: var(--font-0-rem);
           }
         }
+
         .contents {
           padding-top: var(--spacing-block-m);
         }
       }
+
       .small-action {
         &-desc {
           padding: var(--spacing-block-xs) 0;
         }
-        //for core eventually, better way imo
+
+        // for core eventually, better way imo
         .topic-avatar {
           padding-top: 0;
           align-items: center;
+
           .d-icon {
             font-size: var(--font-up-1);
           }
@@ -178,32 +201,43 @@
   }
 
   #topic-footer-buttons {
-    @include breakpoint(mobile-extra-large) {
+    @include viewport.until(sm) {
       padding-inline: var(--spacing-inline-xs) !important;
     }
   }
 }
 
-//should be changed in core, should not be a primary btn
-//changing this into straight buttons to match the progress one, which doesnt work well with rounded corners
+// should be changed in core, should not be a primary btn
+// changing this into straight buttons to match the progress one, which doesn't work well with rounded corners
 #topic-progress-wrapper {
   .progress-back-container {
     margin-right: 0;
     margin-bottom: var(--spacing-block-xs);
+
     .btn-primary.progress-back {
       border-radius: 0;
       background: var(--secondary);
       border: 1px solid var(--tertiary-low);
       color: var(--accent-color);
       padding: var(--spacing-inline-s) var(--spacing-inline-m);
+
       .d-icon {
         color: var(--accent-color);
       }
     }
   }
+
   .topic-admin-menu-trigger {
     border-radius: 0;
     background: var(--secondary);
     border: 1px solid var(--tertiary-low);
   }
 }
+
+.mobile-device #reply-control.show-preview .submit-panel {
+  background-color: var(--background-color);
+}
+
+.d-editor-preview-wrapper {
+  outline: 2px solid var(--background-color);
+}

scss/nav-pills.scss

@@ -1,37 +1,64 @@
+@use "lib/viewport";
 .list-controls {
   position: sticky;
   top: var(--header-offset);
   background: var(--d-content-background);
-  z-index: 100;
-  padding: 1.5rem 0 1rem 0;
+  z-index: z("base");
+  padding: 1.5rem 0 0 0;
   max-width: unset;
 
+  @include viewport.until(sm) {
+    padding-bottom: 1em;
+  }
+
   .navigation-container {
+    position: relative;
     gap: 1rem;
+
+    @include viewport.from(sm) {
+      &:after {
+        content: "";
+        position: absolute;
+        left: 0;
+        right: 0;
+        bottom: -1rem;
+        height: 1rem;
+        background: linear-gradient(
+          to bottom,
+          var(--d-content-background),
+          transparent
+        );
+      }
+    }
+
     .category-breadcrumb {
       order: 1;
     }
   }
+
   .combo-box .combo-box-header {
-    // needs more specificy than just in the button file
+    // needs more specificity than just in the button file
     background-color: var(--secondary);
-    border-radius: var(--d-border-radius-large);
+    border-radius: var(--d-border-radius);
     border: 1px solid var(--primary-300);
-    // font-size: var(--font-up-1-rem);
+
     &:hover {
       border: 1px solid var(--accent-color);
     }
+
     &:focus-visible {
       .discourse-no-touch & {
         background: var(--secondary);
         color: var(--accent-color);
-        box-shadow: 0px 0px 0px 3px var(--button-box-shadow);
+        box-shadow: 0 0 0 3px var(--button-box-shadow);
+
         .d-icon {
           color: var(--accent-color);
         }
       }
     }
   }
+
   .select-kit.combo-box.category-drop.has-selection
     .category-drop-header:hover {
     border-color: transparent;
@@ -47,7 +74,8 @@
 .nav-pills > li button:hover {
   .discourse-no-touch & {
     background: transparent;
-    color: var(--accent-color);
+    color: var(--d-nav-color--hover);
+
     &::after {
       content: "";
       position: absolute;
@@ -55,7 +83,7 @@
       bottom: 0;
       right: 0;
       height: var(--d-nav-underline-height);
-      background: var(--accent-color);
+      background: var(--d-nav-color--hover);
     }
   }
 }

scss/search-banner.scss

@@ -1,82 +0,0 @@
-.custom-search-banner-wrap {
-  display: grid;
-  grid-template-rows: 0.33fr 0.33fr 0.33fr;
-  grid-template-columns: 1fr 1fr;
-  grid-column-gap: 1em;
-  grid-row-gap: 0.5em;
-  border-bottom: 1px solid var(--primary-300);
-  padding: 1.5em 0 2.5em;
-  margin-bottom: 0;
-  @media screen and (max-width: 768px) {
-    padding: 1em;
-  }
-  h1 {
-    grid-column: 1/2;
-    grid-row: 1/-1;
-    text-align: left;
-    align-self: center;
-    margin: 0;
-    font-weight: 400;
-    color: var(--search-banner-text-color);
-    @media screen and (max-width: 1028px) {
-      font-size: var(--font-up-4);
-      grid-column: 1/-1;
-      grid-row: 1;
-      text-align: center;
-      margin-bottom: 0.5em;
-    }
-    @media screen and (max-width: 768px) {
-      text-align: left;
-      grid-column: 1/2;
-      grid-row: 1/-1;
-      font-size: var(--font-up-3);
-    }
-    @media screen and (max-width: 600px) {
-      grid-column: 1/-1;
-      grid-row: 1;
-      text-align: center;
-      margin-bottom: 0.5em;
-    }
-  }
-  .search-menu {
-    grid-column: 2/3;
-    grid-row: 1/-1;
-    width: 100%;
-    align-self: center;
-    @media screen and (max-width: 1028px) {
-      grid-row: 2/-1;
-      grid-column: 1/-1;
-    }
-    @media screen and (max-width: 768px) {
-      grid-column: 2/-1;
-      grid-row: 1/-1;
-    }
-    @media screen and (max-width: 600px) {
-      grid-row: 2/-1;
-      grid-column: 1/-1;
-    }
-  }
-  p {
-    display: none;
-  }
-  .search-input {
-    background: var(--d-content-background);
-    border: 1px solid var(--search-color);
-    box-shadow: 0 4px 10px rgba(52, 6, 121, 15%);
-  }
-  .search-menu .search-input:focus-within,
-  .search-menu-container .search-input:focus-within {
-    border: 1px solid var(--search-color);
-    outline: 2px solid var(--search-color);
-  }
-  .search-menu .d-icon,
-  .search-menu .searching .d-icon {
-    color: var(--search-color);
-  }
-  .panel-body {
-    z-index: z("dropdown");
-  }
-  .results {
-    background: var(--d-content-background);
-  }
-}

scss/sidebar-new-topic-button.scss

@@ -0,0 +1,71 @@
+.navigation-controls {
+  .topic-drafts-menu-trigger,
+  .fk-d-button-tooltip {
+    display: none;
+  }
+}
+
+.has-ai-conversations-sidebar {
+  .sidebar-new-topic-button__wrapper {
+    display: none;
+  }
+}
+
+.sidebar-new-topic-button {
+  flex: 1 1 auto;
+
+  &__wrapper {
+    box-sizing: border-box;
+    display: flex;
+
+    .mobile-view & {
+      margin: 0 0 1rem;
+    }
+
+    &:has(.topic-drafts-menu-trigger) {
+      .sidebar-new-topic-button {
+        border-radius: var(--d-button-border-radius) 0 0
+          var(--d-button-border-radius);
+        border-right: 1px solid var(--primary-300);
+      }
+    }
+
+    .fk-d-button-tooltip {
+      flex: 1 1 auto;
+    }
+
+    .topic-drafts-menu-trigger {
+      flex: 0 1 auto;
+      margin: 0;
+      border-radius: 0 var(--d-button-border-radius)
+        var(--d-button-border-radius) 0;
+    }
+
+    .fk-d-button-tooltip:has(button[disabled]) {
+      + .topic-drafts-menu-trigger {
+        display: none;
+      }
+
+      .fk-d-tooltip__trigger {
+        background: var(--accent-color);
+        border-radius: 0 var(--d-button-border-radius)
+          var(--d-button-border-radius) 0;
+        padding-right: 0.65em;
+
+        .d-icon {
+          color: var(--secondary);
+        }
+      }
+    }
+  }
+}
+
+li.sidebar-section-link-wrapper[data-list-item-name="New Topic"] {
+  display: none;
+}
+
+.has-full-page-chat {
+  .sidebar-new-topic-button__wrapper {
+    display: none;
+  }
+}

scss/sidebar.scss

@@ -1,18 +1,24 @@
+@use "lib/viewport";
+
 .sidebar-wrapper,
 .sidebar-hamburger-dropdown {
-  @include breakpoint(medium) {
+  @include viewport.until(lg) {
     background: var(--secondary);
+
     .sidebar-footer-wrapper {
       background: var(--secondary);
+
       .sidebar-footer-container::before {
         display: none;
       }
     }
   }
+
   .has-full-page-chat &,
   .has-full-page-chat & .sidebar-footer-wrapper {
     background: transparent;
   }
+
   .sidebar-container {
     border-right: none;
   }
@@ -20,31 +26,38 @@
   .sidebar-sections {
     padding: 0;
   }
+
   .sidebar-section-link {
     transition: none;
     border-radius: var(--d-border-radius);
   }
+
   .dropdown-menu__item .sidebar-section-link {
-    border-radius: 0px;
+    border-radius: 0;
   }
 }
+
 .sidebar-section-wrapper {
-  @include breakpoint(extra-large, $rule: min-width) {
+  @include viewport.from(xl) {
     padding-block: 0.45em;
   }
-  @include breakpoint(mobile-extra-large) {
+
+  @include viewport.until(sm) {
     .hamburger-panel .revamped & {
       margin-bottom: var(--spacing-block-m);
     }
   }
+
   .sidebar-section-header {
     font-size: var(--font-down-2);
   }
+
   .sidebar-section-content {
     margin: 0;
     display: flex;
     flex-direction: column;
-    @include breakpoint(extra-large, $rule: min-width) {
+
+    @include viewport.from(xl) {
       gap: var(--spacing-block-xs);
     }
   }
@@ -52,6 +65,7 @@
 
 .sidebar-wrapper .sidebar-sections {
   --scrollbarThumbBg: var(--d-selected);
+  padding: 0 1rem;
 }
 
 .sidebar-section-link-wrapper .sidebar-section-link:focus,
@@ -63,11 +77,17 @@
 
 .sidebar-new-topic-button__wrapper {
   margin: 0 var(--spacing-inline-m) var(--spacing-block-l);
+
   .sidebar-new-topic-button .d-icon {
     display: none;
   }
 }
 
-.sidebar-wrapper .sidebar-sections {
-  padding: 0 1rem;
+// put the draft menu above the slide-out hamburger on small desktop screens
+@include viewport.until(md) {
+  html:not(.mobile-view) {
+    .topic-drafts-menu-content {
+      z-index: z("modal", "overlay");
+    }
+  }
 }

scss/topic-cards.scss

@@ -1,15 +1,4 @@
-// 390x844 – mobile/portrait – (Figma iPhone 13 & 14)
-// 744x1133 – tablet/portrait – (Figma iPad mini 8.3)
-// 1280x832 – desktop small – (Figma MacBook Air)
-
-:root {
-  --hot-color: oklch(63.79% 0.1823 34.77);
-}
-
-$extra-small: 435px;
-$small: 576px;
-$medium: 980px;
-$extra-large: 1280px;
+@use "lib/viewport";
 
 .topic-list .topic-list-item-separator {
   display: none;
@@ -17,6 +6,7 @@ $extra-large: 1280px;
 
 .topic-list > .topic-list-body > .topic-list-item.last-visit {
   border-bottom: 1px solid var(--primary-300);
+
   &:hover {
     border-color: var(--accent-color);
   }
@@ -26,138 +16,108 @@ $extra-large: 1280px;
   border: none;
   display: flex;
   flex-direction: column;
-  gap: 1em;
-  @include breakpoint(medium) {
+  gap: 1.25em;
+
+  @include viewport.until(lg) {
     gap: 0.5em;
+    padding: 0 0.5em;
   }
-}
 
-.bulk-select-enabled .topic-list-item {
-  grid-template-areas:
-    "bulk-select avatar author status status . activity"
-    ". topic-title topic-title topic-title likes-replies likes-replies category";
-  .bulk-select {
-    grid-area: bulk-select;
+  @include viewport.until(sm) {
+    gap: 0;
     padding: 0;
-    margin: 0;
-    align-self: center;
-    justify-self: center;
-    label {
-      margin: 0;
-    }
-  }
-  @media screen and (max-width: $medium) {
-    grid-template-columns: 44px min-content min-content auto min-content min-content min-content;
-    grid-template-rows: 22px minmax(22px, auto);
-    grid-template-areas:
-      "bulk-select avatar author status status  . activity"
-      ". topic-title topic-title topic-title . . likes-replies"
-      ". topic-title topic-title topic-title . . category";
-  }
-  @media screen and (max-width: $small) {
-    grid-template-columns: 25px auto repeat(6, 1fr);
-    grid-template-rows: auto auto auto;
-    grid-template-areas:
-      "bulk-select category-status category-status . . . . activity"
-      "topic-title topic-title topic-title topic-title topic-title topic-title topic-title topic-title"
-      "avatar author . . . . . likes-replies";
   }
 }
 
-body.user-messages-page .topic-list-item {
-  .topic-category-status-data {
-    display: none;
-  }
-  grid-template-areas:
-    "avatar author status status . . activity"
-    ". topic-title topic-title topic-title likes-replies likes-replies likes-replies";
-  &.excerpt-expanded {
-    grid-template-columns: 44px repeat(6, 1fr) auto;
-    grid-template-rows: 22px auto auto 30px;
-    grid-template-areas:
-      "avatar author status status . . . activity"
-      "avatar topic-title topic-title topic-title topic-title . . ."
-      ". excerpt excerpt excerpt excerpt excerpt . ."
-      ". excerpt excerpt excerpt excerpt excerpt likes-replies likes-replies";
-    @media screen and (max-width: $extra-large) {
-      grid-template-areas:
-        "avatar author status status . . . activity"
-        "avatar topic-title topic-title topic-title topic-title . . ."
-        ". excerpt excerpt excerpt excerpt excerpt . likes-replies"
-        ". excerpt excerpt excerpt excerpt excerpt . likes-replies";
-    }
-  }
-  @media screen and (max-width: $small) {
-    grid-template-columns: 25px auto repeat(6, 1fr);
-    grid-template-rows: auto auto;
-    grid-template-areas:
-      "topic-title topic-title topic-title topic-title topic-title topic-title topic-title activity"
-      "avatar author . . . . . likes-replies";
-    .topic-excerpt {
-      display: none;
-    }
-  }
-}
-
-.topic-list-item {
+.topic-list-body .topic-list-item {
+  position: relative;
+  background: var(--d-content-background);
+  box-shadow: 0 0 12px 1px var(--topic-card-shadow);
   text-overflow: ellipsis;
   padding: 0.75em 1rem;
   border: 1px solid var(--primary-300);
   display: grid;
-  grid-template-columns: 44px min-content min-content auto min-content min-content min-content;
-  grid-template-rows: 22px minmax(22px, auto);
+  grid-template-columns: min-content min-content auto min-content;
   grid-template-areas:
-    "avatar author status status . . activity"
-    ". topic-title topic-title topic-title likes-replies likes-replies category";
-  grid-column-gap: 12px;
-  grid-row-gap: 8px;
+    "creator title title status"
+    "creator category activity likes-replies";
+  grid-column-gap: 0.75rem;
+  grid-row-gap: 0.5rem;
   border-radius: var(--d-border-radius);
-  &.excerpt-expanded {
-    grid-template-columns: 44px repeat(6, 1fr) auto;
-    grid-template-rows: 22px auto auto 30px;
+  cursor: pointer;
+
+  .bulk-select-enabled & {
+    grid-template-columns: min-content min-content min-content auto min-content;
     grid-template-areas:
-      "avatar author status status . . . activity"
-      "avatar topic-title topic-title topic-title topic-title . . ."
-      ". excerpt excerpt excerpt excerpt excerpt . ."
-      ". excerpt excerpt excerpt excerpt excerpt likes-replies category";
-    @media screen and (max-width: $extra-large) {
-      grid-template-areas:
-        "avatar author status status . . . activity"
-        "avatar topic-title topic-title topic-title topic-title . . ."
-        ". excerpt excerpt excerpt excerpt excerpt . likes-replies"
-        ". excerpt excerpt excerpt excerpt excerpt . category";
+      "bulk-select creator title title status"
+      "bulk-select creator category activity likes-replies";
+  }
+
+  @include viewport.until(sm) {
+    grid-template-areas:
+      "category category category status"
+      "creator title title title"
+      "activity activity activity likes-replies";
+    row-gap: 0.75em;
+    border: none;
+    border-bottom: 1px solid var(--primary-200);
+    box-shadow: none;
+    border-radius: 0;
+  }
+
+  &:hover {
+    .discourse-no-touch & {
+      border-color: var(--accent-color);
+      background: var(--d-content-background);
     }
-    @media screen and (max-width: $small) {
-      grid-template-columns: 25px auto repeat(6, 1fr);
-      grid-template-rows: auto auto auto;
-      grid-template-areas:
-        "category-status category-status category-status . . . . activity"
-        "topic-title topic-title topic-title topic-title topic-title topic-title topic-title topic-title"
-        "avatar author . . . . . likes-replies";
-      .topic-excerpt {
+  }
+
+  &.selected {
+    box-shadow:
+      0 0 0 2px var(--accent-color),
+      0 0 12px 1px var(--topic-card-shadow);
+  }
+
+  &.excerpt-expanded {
+    @include viewport.until(sm) {
+      .topic-excerpt,
+      .link-bottom-line {
         display: none;
       }
     }
+
+    @include viewport.from(sm) {
+      grid-template-areas:
+        "creator title title status"
+        "creator category activity likes-replies "
+        "creator excerpt excerpt excerpt";
+
+      .bulk-select-enabled & {
+        grid-template-areas:
+          "bulk-select creator title title status"
+          "bulk-select creator category activity likes-replies "
+          " bulk-select creator excerpt excerpt excerpt";
+      }
+    }
+
+    // when there is enough space, excerpt can be next to likes-replies
+    @include viewport.from(lg) {
+      grid-template-areas:
+        "creator title title status"
+        "creator category activity ."
+        "creator excerpt excerpt likes-replies";
+    }
   }
-  @media screen and (max-width: $medium) {
-    grid-template-columns: 44px min-content min-content auto min-content min-content min-content;
-    grid-template-rows: 22px minmax(22px, auto);
-    grid-template-areas:
-      "avatar author status status . . activity"
-      ". topic-title topic-title topic-title . . likes-replies"
-      ". topic-title topic-title topic-title . . category";
-  }
-  @media screen and (max-width: $small) {
-    grid-template-columns: 25px auto repeat(6, 1fr);
-    grid-template-rows: auto auto auto;
-    grid-template-areas:
-      "category-status category-status category-status . . . . activity"
-      "topic-title topic-title topic-title topic-title topic-title topic-title topic-title topic-title"
-      "avatar author . . . . . likes-replies";
-  }
-  @include breakpoint(medium) {
-    border: none;
-    border-bottom: 1px solid var(--primary-200);
+
+  .link-top-line {
+    grid-area: title;
+    font-weight: 500;
+    display: flex;
+    align-items: center;
+
+    .title {
+      padding: 0;
+    }
   }
 
   // display contents
@@ -165,7 +125,8 @@ body.user-messages-page .topic-list-item {
   td.posters,
   td.posts,
   td.views,
-  td.activity {
+  td.activity,
+  td.topic-category-status-data {
     display: contents;
   }
 
@@ -173,103 +134,88 @@ body.user-messages-page .topic-list-item {
     padding: 0;
   }
 
-  // avatar & author
-  .topic-author-avatar-data {
-    grid-area: avatar;
-    margin: 0;
-  }
-  .topic-author-avatar img.avatar {
-    width: 44px;
-    height: 44px;
-    border-radius: var(--d-border-radius);
-    @media screen and (max-width: $small) {
-      width: 25px;
-      height: 25px;
-    }
-  }
-  td.topic-author-data {
-    grid-area: author;
-    display: flex;
-    gap: 0.5em;
-    align-items: center;
-  }
-  .topic-author-data .topic-author {
-    color: var(--primary-500);
-  }
-
-  // status
-  .topic-status-card {
-    display: flex;
-    flex-direction: row;
-    gap: 4px;
-    align-items: center;
-    padding: 0 6px;
-    font-size: var(--font-down-2);
-    font-weight: 600;
-    border-radius: var(--d-border-radius);
-    border: 1px solid var(--status-color);
-    color: var(--status-color);
-    height: min-content;
-    grid-area: status;
-    width: min-content;
-    @media screen and (max-width: $small) {
-      height: calc(100% - 2px);
-    }
-    svg {
-      font-size: var(--font-down-1);
-      color: var(--status-color);
-    }
-  }
-
-  .topic-status-card.--bookmark {
-    display: none;
-  }
-  .topic-status-card.--pinned,
-  .topic-status-card.--unpinned {
-    --status-color: var(--primary-500);
-    cursor: pointer;
-    background-color: transparent;
-    line-height: unset;
-  }
-  .topic-status-card.--hot {
-    --status-color: var(--hot-color);
-  }
-
-  // title
-  td.main-link .link-top-line {
-    font-size: var(--font-0);
-    grid-area: topic-title;
-    font-weight: 500;
-  }
-
-  .link-top-line .event-date {
-    font-size: var(--font-down-3);
-  }
-
-  td.main-link a.topic-status {
+  // display:nones
+  td.main-link a.topic-status,
+  .link-bottom-line,
+  .badge-notification.new-topic::before {
     display: none;
   }
 
-  td.main-link .link-top-line a.raw-topic-link {
-    padding: 0;
+  .topic-category-data {
+    grid-area: category;
+    display: flex;
   }
 
-  .topic-post-badges .badge-notification.unread-posts {
-    background-color: var(--tertiary);
-    color: var(--tertiary);
-    overflow: hidden;
-    height: 8px;
-    width: 8px;
-    padding: 0;
-    top: -2px;
-    min-width: unset;
+  .badge-category__wrapper {
+    border-radius: var(--d-border-radius);
+    padding: 0.25em 0.5rem;
+    background-color: light-dark(
+      oklch(from var(--category-badge-color) 97% calc(c * 0.3) h),
+      oklch(from var(--category-badge-color) 45% calc(c * 0.5) h)
+    );
+
+    @include viewport.until(md) {
+      padding: 0.25em 0.5rem;
+      font-size: var(--font-down-2);
+    }
+
+    .badge-category__name {
+      color: light-dark(
+        oklch(from var(--category-badge-color) 20% calc(c * 1) h),
+        oklch(from var(--category-badge-color) 100% calc(c * 0.9) h)
+      );
+    }
   }
 
-  // excerpt
-  .topic-excerpt {
-    grid-area: excerpt;
-    margin: 0;
-    font-size: var(--font-down-2);
+  // OP avatar
+  .topic-creator-data {
+    grid-area: creator;
+
+    .avatar {
+      height: 50px;
+      width: 50px;
+      border-radius: var(--d-border-radius);
+
+      @include viewport.until(sm) {
+        height: 30px;
+        width: 30px;
+        border-radius: 0.25rem;
+      }
+    }
+  }
+
+  .dot-separator {
+    width: 0.25em;
+    height: 0.25em;
+    background-color: var(--primary-500);
+    border-radius: 100%;
+    margin-inline: 0.25em;
+  }
+
+  // topic activity, icon, text
+  .topic-activity-data {
+    @include ellipsis;
+    grid-area: activity;
+  }
+
+  .topic-activity {
+    display: flex;
+    font-size: var(--font-down-1);
+    height: 100%;
+    align-items: center;
+    gap: 0.25em;
+  }
+
+  .topic-activity__type {
+    border-radius: 0.25rem;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+  }
+
+  .topic-activity__username {
+    @include ellipsis;
+    margin-left: 0.25em;
   }
 
   // timestamp
@@ -281,46 +227,87 @@ body.user-messages-page .topic-list-item {
     padding: 0;
   }
 
-  // metadata
-  // metadata - category
-  td.main-link .link-bottom-line {
-    display: none;
+  // status
+  .topic-status-data {
+    grid-area: status;
   }
 
-  td.topic-category-status-data {
-    display: contents;
-    @media screen and (max-width: $small) {
-      grid-area: category-status;
-      display: flex;
-      gap: 0.5em;
-      align-items: center;
-    }
-  }
-  td.topic-category-status-data .badge-category__wrapper {
-    grid-area: category;
-  }
-
-  td.topic-category-status-data .badge-category__wrapper {
-    overflow: unset;
+  .topic-status-card {
+    height: min-content;
+    margin-left: auto;
+    display: flex;
+    flex-direction: row;
+    gap: 0.25em;
+    align-items: center;
+    padding: 0.2em 0.5rem;
+    font-size: var(--font-down-3);
+    font-weight: 600;
     border-radius: var(--d-border-radius);
-    padding: 6px;
-    align-self: flex-end;
-    background-color: light-dark(
-      oklch(from var(--category-badge-color) 97% calc(c * 0.3) h),
-      oklch(from var(--category-badge-color) 45% calc(c * 0.5) h)
-    );
+    border: 1px solid var(--status-color);
+    color: var(--status-color);
+    width: min-content;
 
-    @media screen and (max-width: $small) {
-      padding: 2px 6px;
+    &.--pinned {
+      --status-color: var(--primary-500);
     }
 
-    .badge-category__name {
-      color: light-dark(
-        oklch(from var(--category-badge-color) 20% calc(c * 1) h),
-        oklch(from var(--category-badge-color) 100% calc(c * 0.9) h)
-      );
+    &.--hot {
+      --status-color: #e45735;
+    }
+
+    @include viewport.from(lg) {
+      position: absolute;
+      right: 1rem;
+      top: 0;
+      transform: translateY(-45%);
+      background-color: var(--d-content-background);
+    }
+
+    svg {
+      font-size: var(--font-down-1);
+      color: var(--status-color);
     }
   }
+
+  .link-top-line .event-date {
+    margin-left: 0.5em;
+    font-size: var(--font-down-3);
+  }
+
+  .topic-list-data {
+    padding: 0;
+  }
+
+  .topic-post-badges .badge-notification.unread-posts,
+  .topic-post-badges .badge-notification.new-topic {
+    background-color: var(--tertiary);
+    color: var(--tertiary);
+    overflow: hidden;
+    height: 8px;
+    width: 8px;
+    padding: 0;
+    top: -2px;
+    min-width: unset;
+  }
+
+  // metadata - excerpt
+  .topic-excerpt {
+    grid-area: excerpt;
+    margin: 0;
+    padding: 0;
+    font-size: var(--font-down-2);
+    width: 100%;
+
+    .excerpt__contents {
+      color: var(--primary-high);
+    }
+
+    // default category position hidden
+    .badge-category__wrapper {
+      display: none;
+    }
+  }
+
   td.main-link .discourse-tags {
     display: none;
   }
@@ -339,9 +326,9 @@ body.user-messages-page .topic-list-item {
     gap: 0.5em;
     justify-content: flex-end;
     height: min-content;
-    align-self: flex-end;
-    padding-bottom: 4px;
+    align-self: center;
   }
+
   .topic-likes-replies-data .topic-likes,
   .topic-likes-replies-data .topic-replies {
     display: flex;
@@ -349,27 +336,319 @@ body.user-messages-page .topic-list-item {
     gap: 0.5em;
     align-items: center;
     color: var(--primary-500);
+    font-size: var(--font-down-1-rem);
+
     svg {
       color: var(--primary-600);
     }
   }
-}
 
-.topic-list-header {
-  display: none;
-}
+  .bulk-select {
+    grid-area: bulk-select;
+    padding: 0;
+    margin: 0;
+    align-self: center;
+    justify-self: center;
 
-.topic-list-item {
-  background: var(--d-content-background);
-  box-shadow: 0px 0px 12px 1px var(--topic-card-shadow);
-  &:hover {
-    .discourse-no-touch & {
-      border-color: var(--accent-color);
-      background: var(--d-content-background);
+    @include viewport.until(sm) {
+      align-self: flex-start;
+    }
+
+    label {
+      margin: 0;
+    }
+
+    &th {
+      display: none;
     }
   }
-  &.selected {
-    box-shadow: 0px 0px 0px 2px var(--accent-color),
-      0px 0px 12px 1px var(--topic-card-shadow);
+}
+
+// Bookmarks
+.topic-list-item.bookmark-list-item {
+  .link-bottom-line {
+    font-size: unset;
+  }
+
+  // regular card without excerpt class
+  grid-template-columns: 20px min-content min-content auto min-content min-content min-content;
+  grid-template-areas:
+    ". . . . . . dropdown"
+    "avatar update metadata metadata metadata . category";
+
+  @include viewport.until(sm) {
+    grid-template-columns: min-content min-content auto min-content min-content min-content min-content;
+    grid-template-areas:
+      " . . . . . . dropdown"
+      "update metadata metadata metadata metadata category category";
+
+    .avatar {
+      display: none;
+    }
+  }
+
+  &.has-metadata {
+    grid-template-columns: 20px min-content min-content auto min-content min-content min-content;
+
+    @include viewport.until(sm) {
+      grid-template-areas:
+        ". . . . . . . dropdown"
+        "update update metadata metadata metadata metadata category category";
+
+      .avatar {
+        display: none;
+      }
+    }
+  }
+
+  // card with excerpt (all in horizon since the toggle is gone)
+  &.excerpt-expanded {
+    grid-template-columns: 20px min-content auto minmax(0, 100px);
+    grid-template-areas:
+      ". . .  dropdown"
+      "avatar update metadata metadata"
+      "excerpt excerpt excerpt ."
+      "excerpt excerpt excerpt category";
+
+    @include viewport.from(xl) {
+      grid-template-columns: 20px min-content auto min-content;
+    }
+
+    @include viewport.until(sm) {
+      grid-template-columns: auto min-content;
+      grid-template-areas:
+        ".  dropdown"
+        "category category";
+
+      .post-excerpt,
+      .avatar {
+        display: none;
+      }
+    }
+
+    &.has-metadata {
+      grid-template-columns: 20px min-content auto min-content;
+      grid-template-areas:
+        ". . . dropdown"
+        "avatar update metadata metadata"
+        "excerpt excerpt excerpt . "
+        "excerpt excerpt excerpt category";
+
+      @include viewport.until(sm) {
+        grid-template-columns: auto min-content;
+        grid-template-areas:
+          " . dropdown"
+          "metadata category";
+
+        .bookmark-metadata {
+          flex-wrap: wrap;
+        }
+      }
+    }
+
+    .badge-category__wrapper {
+      align-self: flex-end;
+      height: min-content;
+      max-width: 100%;
+    }
+  }
+
+  td.author-avatar {
+    grid-area: avatar;
+  }
+
+  td.main-link .link-bottom-line {
+    display: contents;
+
+    .badge-category__wrapper {
+      grid-area: category;
+      display: flex;
+      align-items: center;
+      width: min-content;
+      justify-self: flex-end;
+    }
+  }
+
+  td.main-link .link-top-line {
+    display: contents;
+
+    .bookmark-metadata {
+      grid-area: metadata;
+      margin: 0;
+      display: flex;
+      align-items: center;
+      gap: var(--spacing-inline-xs);
+    }
+
+    .bookmark-metadata-item {
+      margin: 0;
+      vertical-align: middle;
+    }
+
+    .bookmark-status-with-link {
+      grid-column: 1/-2;
+      grid-row: 1/2;
+    }
+  }
+
+  .post-excerpt {
+    grid-area: excerpt;
+    margin: 0;
+  }
+
+  .topic-list-data:last-of-type {
+    display: contents;
+
+    .bookmark-actions-dropdown {
+      grid-area: dropdown;
+      align-self: flex-start;
+      height: 1em;
+
+      .select-kit-header {
+        padding-top: 0;
+        margin-left: auto;
+        align-items: center;
+        background: transparent;
+      }
+
+      .select-kit-header-wrapper {
+        height: 1em;
+        width: 1em;
+      }
+    }
+  }
+
+  .post-metadata.topic-list-data.updated-at {
+    grid-area: update;
+  }
+
+  td.activity .post-activity {
+    display: none;
   }
 }
+
+// Assigned List
+.topic-list-item.assigned-list-item {
+  .topic-status-card {
+    display: none;
+    position: relative;
+    top: unset;
+    right: unset;
+  }
+
+  td.main-link .link-top-line {
+    grid-column: 1/-3;
+  }
+  grid-template-columns: 20px min-content min-content auto min-content min-content min-content;
+  grid-template-areas:
+    ". . . . . status dropdown"
+    "activity . . . . likes-replies category";
+
+  @include viewport.until(sm) {
+    grid-template-columns: 20px min-content min-content auto min-content min-content min-content 36px;
+    grid-template-areas:
+      "category category . . . . status dropdown"
+      ". . . . . . . . "
+      "activity . . . . . . likes-replies";
+  }
+
+  .assign-topic-buttons {
+    display: contents;
+
+    .assign-actions-dropdown {
+      grid-area: dropdown;
+      justify-content: flex-end;
+      height: 1em;
+
+      .select-kit-header {
+        padding-top: 0;
+        margin-left: auto;
+        align-items: center;
+        background: transparent;
+      }
+
+      .select-kit-header-wrapper {
+        height: 1em;
+        width: 1em;
+      }
+    }
+  }
+
+  td.topic-category-status-data {
+    display: contents;
+  }
+}
+
+// User Messages
+body.user-messages-page {
+  .topic-list-body {
+    gap: 0;
+  }
+
+  .topic-list .topic-list-data.posters a:not(.latest) {
+    display: block;
+  }
+
+  .topic-list-item {
+    border-radius: 0;
+    box-shadow: none;
+    border-bottom: 1px solid var(--primary-200);
+    border-top: none;
+    border-right: none;
+    border-left: none;
+    display: grid;
+    grid-template-areas: "title activity" "posters .";
+    grid-template-columns: auto auto;
+    grid-template-rows: auto auto;
+
+    &:hover {
+      .discourse-no-touch & {
+        background-color: var(--primary-low);
+        border-color: var(--primary-200);
+      }
+    }
+
+    td.topic-category-data,
+    td.topic-likes-replies-data,
+    td.topic-status-data,
+    td.topic-creator-data {
+      display: none;
+    }
+
+    .main-link .link-top-line {
+      grid-area: title;
+    }
+
+    &.visited .main-link .link-top-line {
+      font-weight: normal;
+    }
+
+    td.topic-activity-data {
+      grid-area: activity;
+    }
+
+    td.topic-list-data.posters {
+      grid-area: posters;
+      display: flex;
+      align-items: center;
+      height: 100%;
+
+      a {
+        margin-right: 4px;
+      }
+
+      .avatar {
+        width: 20px;
+        height: 20px;
+        border-radius: 4px;
+        background-color: var(--primary-low);
+      }
+    }
+  }
+}
+
+.event-date-container {
+  display: inline-flex;
+  position: relative;
+  top: -0.25em; // optical alignment
+}

scss/topic.scss

@@ -1,3 +1,5 @@
+@use "lib/viewport";
+
 .post-stream {
   .contents {
     font-size: var(--font-up-1);
@@ -6,58 +8,66 @@
   }
 }
 
-.container.posts .topic-navigation {
-  // super fragile because new sticky topic title doesnt have a calculated value (= 53px with this font and size but…)
-  top: calc(
-    var(--header-offset, 60px) + 53px + calc(var(--spacing-block-l) * 2)
-  );
-  z-index: 300;
-}
-
 .timeline-container .topic-timeline {
   min-width: unset; // why we have this?
+
   .timeline-scrollarea {
     border-left: 1px solid var(--accent-color);
-  }
-  .timeline-scroller {
-    padding: 0.25em;
-    border: 1px solid var(--accent-color);
-    border-radius: 0.75em;
-    padding-left: 0.5em;
-    margin-left: calc(-0.5em - 2.5px);
-    background: var(--d-content-background);
-    height: 40px !important; // height is coming from element style have no other choice
-  }
-  .timelime-scroller-content {
-    display: flex;
-    flex-direction: column;
-    gap: 0.25em;
-  }
-  .timeline-replies,
-  .timeline-ago {
-    line-height: 1;
-  }
-  .timeline-ago {
-    // font-size: var(--font-down-1);
-  }
-  .timeline-handle {
-    background-color: var(--accent-color);
-    width: 3px;
-    border-radius: 2px;
-    height: calc(100% - 6px);
+
+    .timeline-scroller {
+      @include viewport.from(lg) {
+        margin-left: -4.5px;
+        background: var(--d-content-background);
+        height: 40px !important; // height is coming from element style have no other choice
+      }
+
+      .timeline-replies,
+      .timeline-ago {
+        line-height: 1;
+      }
+    }
+
+    .timeline-handle {
+      background-color: var(--accent-color);
+
+      @include viewport.from(lg) {
+        width: 8px;
+        border-radius: 10px;
+        height: calc(100% - 6px);
+      }
+    }
   }
 }
 
-.container.posts,
-#topic-footer-buttons {
-  padding: 0 24px;
+// should probably get rid of this extra specificity class in core?
+.timeline-container.timeline-fullscreen {
+  @include viewport.until(lg) {
+    .topic-timeline
+      .timeline-scrollarea
+      .timeline-scroller
+      .timeline-scroller-content {
+      padding-right: 0.5em;
+    }
+  }
 }
 
 .container.posts {
-  grid-template-columns: auto 150px;
-  @media screen and (max-width: 924px) {
+  grid-template-columns: auto 8em;
+
+  @media screen and (width <= 924px) {
     grid-template-columns: auto auto;
   }
+
+  .post-notice {
+    padding: var(--spacing-block-sm);
+    border-radius: var(--d-border-radius);
+    font-size: var(--font-down-1-rem);
+
+    .d-icon {
+      font-size: var(--font-up-1);
+      width: 1em;
+    }
+  }
 }
 
 .timeline-container .topic-timeline .timeline-ago {
@@ -101,3 +111,7 @@
 nav.post-controls .actions button {
   font-size: var(--font-0);
 }
+
+.archetype-private_message {
+  --pm-border-radius: var(--d-border-radius);
+}

scss/variables.scss

@@ -3,8 +3,8 @@
   --d-border-radius-large: 20px;
   --d-border-radius: 8px;
   --d-input-border-radius: 6px;
-  // --d-sidebar-row-height: 2.8em;
-  //the idea is: block spacing can grow with font-size, but inline spacing should not to maintain horizontal (text) alignment
+
+  // the idea is: block spacing can grow with font-size, but inline spacing should not to maintain horizontal (text) alignment
   --spacing-block-xs: 0.25em;
   --spacing-block-s: 0.5em;
   --spacing-block-sm: 0.75em;

scss/welcome-banner.scss

@@ -0,0 +1,117 @@
+@use "lib/viewport";
+
+.welcome-banner {
+  &__wrap {
+    display: grid;
+    grid-template-rows: 0.33fr 0.33fr 0.33fr;
+    grid-template-columns: 1fr 1fr;
+    grid-column-gap: 1em;
+    grid-row-gap: 0.5em;
+    border-bottom: 1px solid var(--primary-300);
+    padding: 1.5em 0 2.5em;
+    margin-bottom: 0;
+
+    @media screen and (width <= 768px) {
+      padding: 1em;
+    }
+
+    @include viewport.until(sm) {
+      display: block;
+      padding: 0.5em;
+      margin-top: 0;
+    }
+
+    .search-menu {
+      grid-column: 2/3;
+      grid-row: 1/-1;
+      width: 100%;
+      align-self: center;
+
+      @media screen and (width <= 1028px) {
+        grid-row: 2/-1;
+        grid-column: 1/-1;
+      }
+
+      @media screen and (width <= 768px) {
+        grid-column: 2/-1;
+        grid-row: 1/-1;
+      }
+
+      @media screen and (width <= 600px) {
+        grid-row: 2/-1;
+        grid-column: 1/-1;
+      }
+
+      @include viewport.until(sm) {
+        display: none;
+      }
+    }
+
+    p {
+      display: none;
+    }
+  }
+
+  .search-menu .search-input,
+  .search-menu-container .search-input {
+    background: var(--d-content-background);
+    border: 1px solid var(--search-color);
+    box-shadow: 0 4px 10px rgb(52, 6, 121, 15%);
+  }
+
+  .search-menu .search-input:focus-within,
+  .search-menu-container .search-input:focus-within {
+    border: 1px solid var(--search-color);
+    outline: 2px solid var(--search-color);
+  }
+
+  .search-menu .d-icon,
+  .search-menu .searching .d-icon,
+  .search-menu .searching .show-advanced-search .d-icon {
+    color: var(--search-color);
+  }
+
+  .panel-body {
+    z-index: z("dropdown");
+  }
+
+  .results {
+    background: var(--d-content-background);
+  }
+
+  &__title {
+    grid-column: 1/2;
+    grid-row: 1/-1;
+    text-align: left;
+    align-self: center;
+    margin: 0;
+    font-weight: 400;
+    color: var(--search-color);
+
+    @media screen and (width <= 1028px) {
+      font-size: var(--font-up-4);
+      grid-column: 1/-1;
+      grid-row: 1;
+      text-align: center;
+      margin-bottom: 0.5em;
+    }
+
+    @media screen and (width <= 768px) {
+      text-align: left;
+      grid-column: 1/2;
+      grid-row: 1/-1;
+      font-size: var(--font-up-3);
+    }
+
+    @media screen and (width <= 600px) {
+      grid-column: 1/-1;
+      grid-row: 1;
+      text-align: center;
+      margin-bottom: 0.5em;
+    }
+
+    @include viewport.until(sm) {
+      font-size: var(--font-up-2);
+    }
+  }
+}

settings.yml

@@ -0,0 +1,11 @@
+enable_welcome_banner:
+  default: true
+  description: "Overrides the core `enable welcome banner` site setting"
+
+search_experience:
+  type: enum
+  default: search_field
+  choices:
+    - search_field
+    - search_icon
+  description: "Overrides the core `search experience` site setting"

spec/system/composer_peek_spec.rb

@@ -0,0 +1,54 @@
+# frozen_string_literal: true
+
+describe "Composer peek", type: :system do
+  fab!(:current_user) { Fabricate(:user, refresh_auto_groups: true) }
+  fab!(:topic) { Fabricate(:topic_with_op) }
+
+  let(:topic_page) { PageObjects::Pages::Topic.new }
+  let(:composer) { PageObjects::Components::Composer.new }
+
+  before do
+    upload_theme
+    sign_in(current_user)
+  end
+
+  it "does not show composer peek for small windows" do
+    topic_page.visit_topic(topic)
+    topic_page.click_footer_reply
+    expect(composer).to be_opened
+
+    resize_window(width: 600) { expect(page).to have_no_css(".peek-mode-toggle") }
+  end
+
+  it "turns on composer peek and remembers this preference on page load" do
+    topic_page.visit_topic(topic)
+    topic_page.click_footer_reply
+    expect(composer).to be_opened
+
+    resize_window(width: 1380) do
+      find(".peek-mode-toggle").click
+      expect(page).to have_css("body.peek-mode-active")
+
+      topic_page.visit_topic(topic)
+      topic_page.click_footer_reply
+      expect(composer).to be_opened
+      expect(page).to have_css("body.peek-mode-active")
+
+      find(".peek-mode-toggle").click
+      expect(page).to have_no_css("body.peek-mode-active")
+    end
+  end
+
+  it "hides the composer preview when toggling" do
+    topic_page.visit_topic(topic)
+    topic_page.click_footer_reply
+    expect(composer).to be_opened
+    expect(composer).to have_composer_preview
+
+    resize_window(width: 1380) do
+      find(".peek-mode-toggle").click
+      expect(page).to have_css("body.peek-mode-active")
+      expect(composer).to have_no_composer_preview
+    end
+  end
+end

spec/system/core_features_spec.rb

@@ -0,0 +1,22 @@
+# frozen_string_literal: true
+
+RSpec.describe "Core features", type: :system do
+  fab!(:current_user) { Fabricate(:user, refresh_auto_groups: true) }
+  let(:composer) { PageObjects::Components::Composer.new }
+
+  before { upload_theme_or_component }
+
+  it_behaves_like "having working core features",
+                  skip_examples: %i[search:quick_search topics:create]
+
+  it "creates a new topic" do
+    sign_in(current_user)
+    visit("/new-topic")
+    composer.fill_title("This is a new topic")
+    composer.fill_content("This is a long enough sentence.")
+    expect(page).to have_css(".d-editor-preview p", visible: true)
+    within(".save-or-cancel") { click_button("Create Topic") }
+    expect(page).to have_content("This is a new topic")
+    expect(page).to have_content("This is a long enough sentence.")
+  end
+end

spec/system/horizon_high_level_spec.rb

@@ -1,7 +1,16 @@
 # frozen_string_literal: true
 
+require_relative "./page_objects/components/user_color_palette_selector"
+
 describe "Horizon theme | High level", type: :system do
-  let!(:theme) { upload_theme }
+  let!(:theme) do
+    horizon_theme = upload_theme
+    ColorScheme
+      .where(theme_id: horizon_theme.id)
+      .where.not("name LIKE '%Dark%'")
+      .update_all(user_selectable: true)
+    horizon_theme
+  end
   fab!(:current_user) { Fabricate(:user) }
   fab!(:tag_1) { Fabricate(:tag, name: "wow-cool") }
   fab!(:tag_2) { Fabricate(:tag, name: "another-tag") }
@@ -10,6 +19,7 @@ describe "Horizon theme | High level", type: :system do
   let(:topic_list) { PageObjects::Components::TopicList.new }
   let(:topic_page) { PageObjects::Pages::Topic.new }
   let(:sidebar) { PageObjects::Components::NavigationMenu::Sidebar.new }
+  let(:palette_selector) { PageObjects::Components::UserColorPaletteSelector.new }
 
   def run_all_high_level_tests
     expect(page).to have_css(".experimental-screen")
@@ -25,27 +35,29 @@ describe "Horizon theme | High level", type: :system do
     topic_item = find(topic_list.topic_list_item_class(topic_1))
     expect(topic_item.all("td").map { |el| el["class"] }).to eq(
       [
-        "main-link clearfix topic-list-data",
-        "activity num topic-list-data age",
-        "topic-author-data",
-        "topic-category-status-data",
-        "topic-author-avatar-data",
+        "main-link topic-list-data",
+        "topic-status-data",
+        "topic-category-data",
         "topic-likes-replies-data",
+        "topic-creator-data",
+        "topic-activity-data",
       ],
     )
 
-    # Can see a topic in the list and navigate to it successfully
+    # Can see a topic in the list and navigate to it successfully.
     topic_list.visit_topic(topic_1)
     expect(topic_page).to have_topic_title(topic_1.title)
 
-    # Can change site colors from the sidebar palette, which are remembered across page reloads
-    palette_menu =
-      PageObjects::Components::DMenu.new(find(".sidebar-footer-actions .user-color-palette"))
-    palette_menu.expand
-    find(".color-palette-menu__content .color-palette-menu__item[data-color='marigold']").click
-    expect(page).to have_css(".custom-color-marigold")
+    # Can change site colors from the sidebar palette, which are remembered
+    # across page reloads.
+    marigold_palette = ColorScheme.find_by(name: "Marigold")
+    palette_selector.open_palette_menu
+    palette_selector.click_palette_menu_item(marigold_palette.name)
+    expect(palette_selector).to have_no_palette_menu
+
     page.refresh
-    expect(page).to have_css(".custom-color-marigold")
+    expect(palette_selector).to have_selected_palette(marigold_palette)
+    expect(palette_selector).to have_tertiary_color(marigold_palette)
   end
 
   it "works for anon" do

spec/system/page_objects/components/user_color_palette_selector.rb

@@ -0,0 +1,53 @@
+# frozen_string_literal: true
+
+module PageObjects
+  module Components
+    class UserColorPaletteSelector < PageObjects::Components::Base
+      def sidebar_footer_button_css
+        ".sidebar-footer-actions .user-color-palette-selector"
+      end
+
+      def palette_menu
+        PageObjects::Components::DMenu.new(find(sidebar_footer_button_css))
+      end
+
+      def open_palette_menu
+        palette_menu.expand
+      end
+
+      def has_no_palette_menu?
+        has_no_css?(".user-color-palette-selector-content")
+      end
+
+      def click_palette_menu_item(palette_name)
+        find(
+          ".user-color-palette-menu__content .user-color-palette-menu__item[data-color-palette='#{palette_name}']",
+        ).click
+      end
+
+      def has_selected_palette?(palette)
+        has_css?(".user-color-palette-selector[data-selected-color-palette-id='#{palette.id}']")
+      end
+
+      def has_loaded_css?
+        has_css?(".user-color-palette-selector.user-color-palette-css-loaded")
+      end
+
+      def has_tertiary_color?(palette)
+        computed_color_hex =
+          page.evaluate_script(
+            "getComputedStyle(document.documentElement).getPropertyValue('--tertiary')",
+          )
+        computed_color_hex == "#" + palette.colors.find { |color| color.name == "tertiary" }.hex
+      end
+
+      def has_computed_color?(color)
+        computed_background_color =
+          page.evaluate_script(
+            "getComputedStyle(document.querySelector(\"li.sidebar-section-link-wrapper[data-list-item-name='everything'] .active\")).backgroundColor",
+          )
+        computed_background_color == color
+      end
+    end
+  end
+end

spec/system/sidebar_topic_button_spec.rb

@@ -0,0 +1,55 @@
+# frozen_string_literal: true
+
+RSpec.describe "Sidebar New Topic Button", system: true do
+  before { upload_theme }
+  fab!(:group)
+  fab!(:user) { Fabricate(:user, trust_level: 3, groups: [group]) }
+  fab!(:category)
+  fab!(:private_category) do
+    c = Fabricate(:category_with_definition)
+    c.set_permissions(group => :readonly)
+    c.save
+    c
+  end
+
+  context "for signed in users" do
+    before { sign_in(user) }
+
+    it "renders the new topic button in the sidebar" do
+      visit("/latest")
+      expect(page).to have_css(".sidebar-new-topic-button__wrapper")
+      expect(page).to have_css(".sidebar-new-topic-button:not(.disabled)")
+    end
+
+    it "opens the composer when clicked" do
+      visit("/")
+      find(".sidebar-new-topic-button").click
+      expect(page).to have_css("#reply-title")
+    end
+
+    it "shows draft menu when drafts exist" do
+      Draft.create!(user: user, draft_key: "topic_1", data: {})
+
+      visit("/")
+      expect(page).to have_css(".sidebar-new-topic-button__wrapper .topic-drafts-menu-trigger")
+    end
+
+    it "disables button when visiting read-only category" do
+      visit("/c/#{private_category.slug}/#{private_category.id}")
+
+      expect(page).to have_css(".sidebar-new-topic-button[disabled]")
+
+      visit("/c/#{category.slug}/#{category.id}")
+
+      expect(page).not_to have_css(".sidebar-new-topic-button[disabled]")
+    end
+  end
+
+  context "for anon" do
+    it "does not render the sidebar button for anons" do
+      visit("/latest")
+      expect(page).not_to have_css(".sidebar-new-topic-button__wrapper")
+      expect(page).not_to have_css(".sidebar-new-topic-button:not(.disabled)")
+    end
+  end
+end

spec/system/user_color_palette_selector_spec.rb

@@ -0,0 +1,119 @@
+# frozen_string_literal: true
+
+require_relative "./page_objects/components/user_color_palette_selector"
+
+describe "Horizon theme | User color palette selector", type: :system do
+  let(:set_theme_as_default) { true }
+  let!(:theme) do
+    horizon_theme = upload_theme(set_theme_as_default: set_theme_as_default)
+    ColorScheme.where(theme_id: horizon_theme.id).update_all(user_selectable: true)
+    horizon_theme
+  end
+  fab!(:current_user) { Fabricate(:user) }
+  let(:sidebar) { PageObjects::Components::NavigationMenu::Sidebar.new }
+  let(:palette_selector) { PageObjects::Components::UserColorPaletteSelector.new }
+  let(:interface_color_mode) { PageObjects::Components::InterfaceColorMode.new }
+  let(:interface_color_selector) do
+    PageObjects::Components::InterfaceColorSelector.new(".sidebar-footer-actions")
+  end
+  let(:marigold_palette) { ColorScheme.find_by(name: "Marigold") }
+  let(:marigold_palette_dark) { ColorScheme.find_by(name: "Marigold Dark") }
+
+  before { SiteSetting.interface_color_selector = "sidebar_footer" }
+
+  it "does not show the sidebar button if there are no user-selectable color palettes" do
+    ColorScheme.update_all(user_selectable: false)
+    visit "/"
+    expect(page).to have_no_css(palette_selector.sidebar_footer_button_css)
+  end
+
+  describe "for logged in user" do
+    before { sign_in(current_user) }
+
+    it "can open the user color palette menu and select a palette, which is preseved on reload" do
+      visit "/"
+      palette_selector.open_palette_menu
+      palette_selector.click_palette_menu_item(marigold_palette.name)
+
+      expect(palette_selector).to have_no_palette_menu
+      expect(palette_selector).to have_selected_palette(marigold_palette)
+      expect(palette_selector).to have_loaded_css
+      expect(palette_selector).to have_tertiary_color(marigold_palette)
+
+      page.refresh
+      expect(palette_selector).to have_selected_palette(marigold_palette)
+    end
+
+    it "uses the dark version of the palette if the user selects dark mode" do
+      visit "/"
+      palette_selector.open_palette_menu
+      palette_selector.click_palette_menu_item(marigold_palette.name)
+
+      expect(palette_selector).to have_no_palette_menu
+      expect(palette_selector).to have_selected_palette(marigold_palette)
+      expect(palette_selector).to have_loaded_css
+      expect(palette_selector).to have_computed_color("oklch(0.92 0.0708528 68.5036)")
+
+      interface_color_selector.expand
+      interface_color_selector.dark_option.click
+      expect(interface_color_mode).to have_dark_mode_forced
+      expect(palette_selector).to have_computed_color("oklch(0.481966 0.0354264 68.5036)")
+
+      page.refresh
+      expect(palette_selector).to have_selected_palette(marigold_palette)
+      expect(palette_selector).to have_computed_color("oklch(0.481966 0.0354264 68.5036)")
+    end
+
+    context "when the theme is not default but is selected by a user" do
+      let(:set_theme_as_default) { false }
+
+      it "can open the user color palette menu and select a palette, which is preseved on reload" do
+        theme.update!(user_selectable: true)
+        current_user.user_option.update!(theme_ids: [theme.id])
+        visit "/"
+        palette_selector.open_palette_menu
+        palette_selector.click_palette_menu_item(marigold_palette.name)
+
+        expect(palette_selector).to have_no_palette_menu
+        expect(palette_selector).to have_selected_palette(marigold_palette)
+        expect(palette_selector).to have_loaded_css
+        expect(palette_selector).to have_tertiary_color(marigold_palette)
+      end
+    end
+  end
+
+  describe "for anon" do
+    it "can open the user color palette menu and select a palette, which is preseved on reload" do
+      visit "/"
+      palette_selector.open_palette_menu
+      palette_selector.click_palette_menu_item(marigold_palette.name)
+
+      expect(palette_selector).to have_no_palette_menu
+      expect(palette_selector).to have_selected_palette(marigold_palette)
+      expect(palette_selector).to have_loaded_css
+      expect(palette_selector).to have_tertiary_color(marigold_palette)
+    end
+
+    it "uses the dark version of the palette if the user selects dark mode, which is preserved on reload" do
+      visit "/"
+      palette_selector.open_palette_menu
+      palette_selector.click_palette_menu_item(marigold_palette.name)
+
+      expect(palette_selector).to have_no_palette_menu
+      expect(palette_selector).to have_selected_palette(marigold_palette)
+      expect(palette_selector).to have_loaded_css
+      expect(palette_selector).to have_computed_color("oklch(0.92 0.0708528 68.5036)")
+
+      interface_color_selector.expand
+      interface_color_selector.dark_option.click
+      expect(interface_color_mode).to have_dark_mode_forced
+      expect(palette_selector).to have_selected_palette(marigold_palette)
+      expect(palette_selector).to have_loaded_css
+      expect(palette_selector).to have_computed_color("oklch(0.481966 0.0354264 68.5036)")
+
+      page.refresh
+      expect(palette_selector).to have_selected_palette(marigold_palette)
+      expect(palette_selector).to have_computed_color("oklch(0.481966 0.0354264 68.5036)")
+    end
+  end
+end

stylelint.config.mjs

@@ -0,0 +1,3 @@
+export default {
+  extends: ["@discourse/lint-configs/stylelint"],
+};