diff --git a/docs/04-frontend/components/layout-components.md b/docs/04-frontend/components/layout-components.md
index 53bb9c9..d482ff4 100644
--- a/docs/04-frontend/components/layout-components.md
+++ b/docs/04-frontend/components/layout-components.md
@@ -3,6 +3,10 @@
 This document describes the layout components that form the structure of the
 Flashpoint Web application.
 
+Public pages use `PortalLayout` instead of `AppShell`; see
+[Discovery Portal](../../10-features/12-discovery-portal.md). `AppShell` remains
+for settings and admin pages.
+
 ## Component Hierarchy
 
 ```
diff --git a/docs/04-frontend/views-routing.md b/docs/04-frontend/views-routing.md
index 58f1181..14f5f23 100644
--- a/docs/04-frontend/views-routing.md
+++ b/docs/04-frontend/views-routing.md
@@ -32,6 +32,13 @@ Flashpoint Web frontend.
 /activities               → ActivitiesView (requires "activities.read")
 ```
 
+## Layouts
+
+Public routes (home, browse, game and player pages, favorites, playlists,
+downloaded, dashboard) render in `PortalLayout`; settings and admin routes
+render in `MainLayout` with the sidebar. See
+[Discovery Portal](../10-features/12-discovery-portal.md).
+
 ## Route Protection
 
 ### ProtectedRoute Component
diff --git a/docs/06-api-reference/README.md b/docs/06-api-reference/README.md
index e2ee261..f4d8968 100644
--- a/docs/06-api-reference/README.md
+++ b/docs/06-api-reference/README.md
@@ -73,6 +73,11 @@ Default: 100 requests per 15 minutes. Headers: `X-RateLimit-Limit`,
 - [GET /api/games/:id/launch](./games-api.md#get-launch-data)
 - [GET /api/games/:id/related](./games-api.md#get-related-games)
 
+### Discovery
+
+- [GET /api/discovery/daily](./discovery-api.md#get-game-of-the-day)
+- [GET /api/discovery/playlists](./discovery-api.md#get-playlist-shelves)
+
 ### Users
 
 - [GET /api/users](./users-api.md#list-users)
diff --git a/docs/06-api-reference/discovery-api.md b/docs/06-api-reference/discovery-api.md
new file mode 100644
index 0000000..7e8de35
--- /dev/null
+++ b/docs/06-api-reference/discovery-api.md
@@ -0,0 +1,47 @@
+# Discovery API
+
+Homepage picks drawn from the Flashpoint curated playlists (`Data/Playlists`).
+Only arcade playlists are used, and mature games are left out unless
+`showExtreme=true` (see
+[Mature Content](../10-features/12-discovery-portal.md#mature-content)).
+
+## Get Game of the Day
+
+`GET /api/discovery/daily?date=2026-10-12` - No auth required
+
+Query params: `date` (YYYY-MM-DD, default: today in UTC), `showExtreme`
+(default: false)
+
+Picks the same game for everyone on a given date, from all curated playlists
+combined. Games missing from the install are skipped.
+
+```json
+{
+  "date": "2026-10-12",
+  "game": { "id": "0a4ffe5c-...", "title": "The World's Hardest Game 4", ... },
+  "playlist": { "id": "f45d2eb2-...", "title": "Rage for the Ages" }
+}
+```
+
+Error: `404 Not Found` if no curated games exist
+
+## Get Playlist Shelves
+
+`GET /api/discovery/playlists?count=3&perShelf=7&seed=42` - No auth required
+
+Query params: `count` (default: 3), `perShelf` (games per playlist, default: 7),
+`seed` (0-2147483647, default: 0), `showExtreme` (default: false)
+
+Returns `count` curated playlists, each with a sample of its games. The same
+seed always returns the same playlists and games.
+
+```json
+[
+  {
+    "id": "f45d2eb2-...",
+    "title": "Jingle Jollies",
+    "total": 30,
+    "games": [{ "id": "7de03fe2-...", "title": "Christmas Escape", ... }]
+  }
+]
+```
diff --git a/docs/06-api-reference/games-api.md b/docs/06-api-reference/games-api.md
index 48c0578..b2730d5 100644
--- a/docs/06-api-reference/games-api.md
+++ b/docs/06-api-reference/games-api.md
@@ -10,10 +10,14 @@ Body (JSON): `search` (title/developer/publisher), `platform`, `series`,
 `developers`, `publishers`, `playModes`, `languages`, `library`
 (arcade|theatre), `downloaded` (boolean, optional - restrict to games whose
 data is present on disk), `tags`, `yearFrom`, `yearTo`, `dateAddedSince` (ISO
-datetime), `dateModifiedSince` (ISO datetime), `sortBy`
-(title|releaseDate|dateAdded|dateModified|developer, default: title),
-`sortOrder` (asc|desc, default: asc), `page` (default: 1), `limit` (default: 50,
-max: 100), `showBroken` (default: false), `showExtreme` (default: false)
+datetime), `dateModifiedSince` (ISO datetime), `releasedFrom`, `releasedTo`
+(YYYY-MM-DD, inclusive; only matches day-precise release dates), `sortBy`
+(title|releaseDate|dateAdded|dateModified|developer|random, default: title),
+`seed` (0-2147483647, for `random`: the same seed gives the same order across
+pages), `sortOrder` (asc|desc, default: asc), `page` (default: 1), `limit`
+(default: 50, max: 100), `showBroken` (default: false), `showExtreme` (default:
+false, include
+[mature games](../10-features/12-discovery-portal.md#mature-content))
 
 Returns paginated array with essential game fields (id, title, developer,
 platformName, library, tags, orderTitle).
@@ -39,7 +43,8 @@ with name/code and count.
 
 `GET /api/games/random?library=arcade` - No auth required
 
-Query param: `library` (optional)
+Query params: `library` (optional), `platforms` (comma-separated, optional),
+`showExtreme` (default: false)
 
 Returns single random game object.
 
@@ -137,7 +142,7 @@ canPlayInBrowser, and downloading status.
 
 `GET /api/games/:id/related?limit=10` - No auth required
 
-Query param: `limit` (default: 10, max: 50)
+Query params: `limit` (default: 10, max: 50), `showExtreme` (default: false)
 
 Returns array of related games based on developer/series/tags.
 
diff --git a/docs/06-api-reference/users-api.md b/docs/06-api-reference/users-api.md
index 2d7b912..4524a4d 100644
--- a/docs/06-api-reference/users-api.md
+++ b/docs/06-api-reference/users-api.md
@@ -67,7 +67,8 @@ Returns key-value pairs (stored as strings). Common keys:
 - game_view_mode (grid|list)
 - games_per_page (string, numeric)
 - auto_play_next (true|false)
-- show_extreme_content (true|false)
+- show_mature (1|0) - show mature games; see
+  [Mature Content](../10-features/12-discovery-portal.md#mature-content)
 
 ## Update User Settings
 
diff --git a/docs/07-design-system/theme-system.md b/docs/07-design-system/theme-system.md
index aa42dec..b53465d 100644
--- a/docs/07-design-system/theme-system.md
+++ b/docs/07-design-system/theme-system.md
@@ -3,6 +3,10 @@
 Dynamic theme system with light/dark modes and 22 customizable color palettes.
 Uses CSS variables for instant theme switching with Zustand state management.
 
+Public pages are styled by portal color schemes instead, which override these
+tokens while mounted; see
+[Discovery Portal](../10-features/12-discovery-portal.md#color-schemes).
+
 ## Architecture
 
 ```
diff --git a/docs/10-features/02-game-browsing-filtering.md b/docs/10-features/02-game-browsing-filtering.md
index 6172a8b..c65040e 100644
--- a/docs/10-features/02-game-browsing-filtering.md
+++ b/docs/10-features/02-game-browsing-filtering.md
@@ -37,14 +37,19 @@ grid and list view options.
 - Platform, Series, Developer, Publisher
 - Play Mode, Language, Tags
 - Year Range (1970-2100)
+- Release date range (day-precise dates, e.g. a Time Machine week)
 - Library (arcade/theatre)
 - Downloaded only
-- Show/hide broken games and extreme content
+- Show/hide broken games and
+  [mature content](./12-discovery-portal.md#mature-content)
 
 **Sorting:**
 
-- By: Title, Release Date, Date Added, Developer
+- By: Shuffled (default), Title (default for searches), Release Date, Date
+  Added, Developer
 - Order: Ascending (A-Z) or Descending (Z-A)
+- The shuffle seed is kept in the URL so pages keep a stable order; Reshuffle
+  picks a new one
 
 **Pagination:**
 
@@ -102,7 +107,9 @@ Get paginated list of games with filters.
 - `playModes`, `languages`, `tags` - Comma-separated
 - `library` - 'arcade' or 'theatre'
 - `yearFrom`, `yearTo` - Release year range
-- `sortBy` - 'title', 'releaseDate', 'dateAdded', 'developer'
+- `releasedFrom`, `releasedTo` - Release date range (YYYY-MM-DD)
+- `sortBy` - 'title', 'releaseDate', 'dateAdded', 'developer', 'random'
+- `seed` - Shuffle seed for 'random'
 - `sortOrder` - 'asc' or 'desc'
 - `page` - Page number
 - `limit` - Items per page
diff --git a/docs/10-features/09-system-settings.md b/docs/10-features/09-system-settings.md
index d9a811b..0865940 100644
--- a/docs/10-features/09-system-settings.md
+++ b/docs/10-features/09-system-settings.md
@@ -69,6 +69,7 @@ CREATE TABLE system_settings (
 #### App Tab
 
 - **Site Name** - Customize application name
+- **Tagline** - Optional line shown under the site name in the portal header
 - **Maintenance Mode** - Enable/disable maintenance mode
 - **Default Theme** - Set default theme (light, dark, system)
 - **Default Primary Color** - Set default color scheme
diff --git a/docs/10-features/12-discovery-portal.md b/docs/10-features/12-discovery-portal.md
new file mode 100644
index 0000000..ff4a50e
--- /dev/null
+++ b/docs/10-features/12-discovery-portal.md
@@ -0,0 +1,75 @@
+# Discovery Portal
+
+## Overview
+
+The public pages use an arcade portal layout styled after 2010-era Flash game
+sites, with a homepage built for discovery instead of lists of recent changes.
+Account and admin pages keep the application layout.
+
+## Shell
+
+`PortalLayout` (`frontend/src/components/portal/`) wraps the homepage, browse,
+game, player, favorites, playlists, downloaded and dashboard routes:
+
+- A framed fixed-width page (1180px, desktop first)
+- A wordmark built from the **Site Name** setting, with the optional **Tagline**
+  setting underneath
+- Search, and a user menu holding the library, account and admin links and the
+  mature content switch
+- Genre categories linking to browse by tag: Action, Adventure, Puzzle, Shooter,
+  Platformer, Sports, Strategy, Driving, Escape the Room and Dress Up, plus
+  Animations
+- Keyboard shortcuts: `/` focuses search, `R` opens a random game
+
+## Color Schemes
+
+Portal colors are token sets in `components/portal/schemes.ts`. Each scheme sets
+`--p-*` properties for the portal's own styles (`portal.css`) and overrides the
+shadcn tokens (`--background`, `--primary`, ...) so shared components match. The
+tokens are applied to `<body>` while the portal is mounted, which takes
+precedence over the app theme on `<html>` and also reaches dialogs and menus
+rendered into the body.
+
+One scheme ships, **Chilled** (slate background, sage boxes). Adding a scheme
+means adding an entry to `PORTAL_SCHEMES`; no component changes are needed.
+
+Display text uses Fredoka (OFL, bundled via `@fontsource-variable/fredoka`);
+body text uses Verdana.
+
+## Homepage
+
+- **Game of the Day:** the same pick for everyone on a given day, from the
+  Flashpoint curated playlists, with a link to the previous day's pick
+- **Time Machine:** games released in a given week, starting from a random day
+  between 2005 and 2014. Users can step by week, jump to a random day, or click
+  the date to pick any day. "See all" opens browse filtered to that week. Only
+  games with a day-precise release date are included.
+- **Jump back in:** the signed-in user's recently played games
+- **Playlist shelves:** three random curated playlists with a sample of their
+  games
+
+See the [Discovery API](../06-api-reference/discovery-api.md).
+
+## Default Ordering
+
+Browse lists default to a shuffle instead of title order. The shuffle is seeded
+and the seed is kept in the URL (`seed=`), so paging, back navigation and shared
+links keep the same order; Reshuffle picks a new seed. Searches still default to
+title order.
+
+## Mature Content
+
+Flashpoint's `extreme` game flag is not set in current metadata, so mature games
+are identified the way the Flashpoint Launcher does: by the tag filter groups
+marked `extreme` in `preferences.json` (falling back to
+`.preferences.defaults.json`, then to the launcher's default groups:
+Pornography, Fetishes, Violence, Bigotry and Pornography Extreme).
+
+`MatureContentService` resolves those tags to game IDs once per database load.
+Search, random, related games and discovery exclude them unless the request sets
+`showExtreme=true`.
+
+Users opt in with **Show mature games** in the user menu. The choice is stored
+in the browser (`flashpoint-mature-content`), and for signed-in users also in
+the account's `show_mature` setting, which is applied when they sign in on
+another browser.
diff --git a/docs/10-features/README.md b/docs/10-features/README.md
index 4c34caa..a3aa022 100644
--- a/docs/10-features/README.md
+++ b/docs/10-features/README.md
@@ -27,6 +27,8 @@ Web application.
     date/time formatting and localization across the application
 11. [Maintenance Mode](./11-maintenance-mode.md) - Temporarily restrict access
     during system updates while allowing admin access
+12. [Discovery Portal](./12-discovery-portal.md) - Arcade portal layout, color
+    schemes, discovery homepage and mature content filtering
 
 ## Quick Reference