diff --git a/README.md b/README.md
index 211cca1..7bbb246 100644
--- a/README.md
+++ b/README.md
@@ -120,12 +120,13 @@ silently stay blank instead of erroring.
 - Per-course study guide export (markdown, organized by section)
 
 **Personalization** (Settings)
-- 54 built-in themes (grouped in the dropdown: Base, Editor Themes, and 5
+- 46 built-in themes (grouped in the dropdown: Base, Editor Themes, and 5
   categories of website-inspired schemes sourced from Figma's "53 Unique
-  Website Color Schemes" - 42 of the 53 kept, after cutting a couple of
-  neon-bright ones and several that ended up near-duplicates of another
-  scheme once mapped into actual UI colors), or a fully custom accent
-  color, corner radius, and card style
+  Website Color Schemes" - 34 of the 53 kept, all as dark/colored
+  backgrounds rather than the source page's mostly-white mockups, after
+  cutting a couple of neon-bright accents and pruning near-duplicates by
+  actual color distance), or a fully custom accent color, corner radius,
+  and card style
 - Font, text size, page width, and spacing density
 - Default library path override + manual "Refresh Library" (bypasses the
   5-minute filesystem-scan cache)
@@ -199,10 +200,13 @@ folder and file names.
 ## Tools
 
 `tools/generate_website_scheme_themes.py` is the one-off script that
-produced the 42 "website scheme" theme entries in `THEME_PALETTES` (of
-53 candidates - 11 were cut after visual review, 2 for a neon-bright
-accent and 9 for landing too close to another kept scheme once mapped
-into actual UI colors) - not part of the running app, kept for reference
-if those palettes ever need regenerating or extending. See its module
-docstring for how it turned Figma's color-scheme screenshots into actual
-UI palettes.
+produced the 34 "website scheme" theme entries in `THEME_PALETTES` (of
+53 candidates - all 24 light-mode ones were converted to dark/colored
+backgrounds per request, then 19 were cut across two review passes: 2
+for a neon-bright accent, 17 for landing too close to another kept
+scheme once mapped into actual UI colors, since forcing everything dark
+made several collide that hadn't before) - not part of the running app,
+kept for reference if those palettes ever need regenerating or
+extending. `build_theme()` takes a `force_mood='dark'|'light'` override
+for exactly this kind of bulk remapping. See its module docstring for
+how it turned Figma's color-scheme screenshots into actual UI palettes.
diff --git a/offlineu_core.py b/offlineu_core.py
index 920bdf0..e09b06c 100644
--- a/offlineu_core.py
+++ b/offlineu_core.py
@@ -100,28 +100,25 @@ SETTINGS_CHOICES = {
     'theme': {
         'dark', 'light', 'dracula', 'tokyo_night', 'catppuccin_mocha', 'ayu_dark',
         'github_dark', 'atom_one_dark', 'houston', 'night_owl', 'nord', 'matcha',
-        # 42 palettes derived from Figma's "53 Unique Website Color Schemes"
-        # resource page (11 of the 53 dropped: 2 for a neon-bright accent
-        # that read badly as a button color, the rest for being too close
-        # to another scheme already kept - same accent hue/lightness and
-        # background, just a different name) - see WEBSITE_SCHEME_CATEGORIES
-        # below for the dropdown grouping, and
-        # tools/generate_website_scheme_themes.py (a one-off content-
-        # generation script, not part of the running app) for how the kept
-        # ones were built from that page's screenshots: dominant colors
-        # extracted per scheme, then mapped into this app's bg/text/accent
-        # shape with automatic contrast adjustment against both the
-        # background and the white button text.
-        'ink_wash', 'jade_pebble_morning', 'woodland', 'graphite', 'urban_slate', 'pearl',
-        'vichy', 'sorbet', 'yacht_club', 'amber_walnut_morning', 'copper_aquamarine_dream',
-        'cocoa_topaz_noonday', 'sandstone_aquamarine_serenity', 'honey_opal_sunset',
-        'seashell_garnet_afternoon', 'rose_quartz_evening', 'calcite', 'fireside', 'terrazzo',
-        'sapphire_nightfall_whisper', 'marina', 'emerald_lavender_lake',
-        'sage_peridot_morning', 'amethyst_dawn_haze', 'turquoise_amber_autumn',
-        'sapphire_ash_morning', 'royal_glimmer', 'neptune', 'tropical_heat', 'celestial',
-        'festive_eve', 'freshly_squeezed', 'jelly_shoes', 'gossamer', 'clockwork',
-        'lemon_granite_morning', 'arctic_reflection', 'slate', 'autumn_luxe', 'inked',
-        'wraith', 'urban_nocturne',
+        # 34 palettes derived from Figma's "53 Unique Website Color Schemes"
+        # resource page, all converted to dark/colored backgrounds (the
+        # source page's own schemes were mostly light-mode marketing
+        # mockups) - see WEBSITE_SCHEME_CATEGORIES below for the dropdown
+        # grouping, and tools/generate_website_scheme_themes.py (a one-off
+        # content-generation script, not part of the running app) for how
+        # the kept ones were built: dominant colors extracted per scheme,
+        # mapped into this app's bg/text/accent shape with automatic
+        # contrast adjustment against both the background and the white
+        # button text, then deduplicated against each other by actual
+        # color distance (not eyeballed) once everything converged to dark.
+        'ink_wash', 'jade_pebble_morning', 'woodland', 'graphite', 'pearl', 'yacht_club',
+        'amber_walnut_morning', 'copper_aquamarine_dream', 'sandstone_aquamarine_serenity',
+        'honey_opal_sunset', 'seashell_garnet_afternoon', 'rose_quartz_evening', 'calcite',
+        'fireside', 'terrazzo', 'sapphire_nightfall_whisper', 'marina',
+        'emerald_lavender_lake', 'sage_peridot_morning', 'amethyst_dawn_haze', 'royal_glimmer',
+        'neptune', 'tropical_heat', 'celestial', 'festive_eve', 'freshly_squeezed',
+        'jelly_shoes', 'lemon_granite_morning', 'arctic_reflection', 'slate', 'autumn_luxe',
+        'inked', 'wraith', 'urban_nocturne',
     },
     'font_family': {'system', 'sans', 'serif', 'monospace', 'monaspace'},
     'font_size': {'small', 'medium', 'large', 'xlarge'},
@@ -144,14 +141,10 @@ THEME_DISPLAY_NAMES = {
     'jade_pebble_morning': 'Jade Pebble Morning',
     'woodland': 'Woodland',
     'graphite': 'Graphite',
-    'urban_slate': 'Urban Slate',
     'pearl': 'Pearl',
-    'vichy': 'Vichy',
-    'sorbet': 'Sorbet',
     'yacht_club': 'Yacht Club',
     'amber_walnut_morning': 'Amber Walnut Morning',
     'copper_aquamarine_dream': 'Copper Aquamarine Dream',
-    'cocoa_topaz_noonday': 'Cocoa Topaz Noonday',
     'sandstone_aquamarine_serenity': 'Sandstone Aquamarine Serenity',
     'honey_opal_sunset': 'Honey Opal Sunset',
     'seashell_garnet_afternoon': 'Seashell Garnet Afternoon',
@@ -164,8 +157,6 @@ THEME_DISPLAY_NAMES = {
     'emerald_lavender_lake': 'Emerald Lavender Lake',
     'sage_peridot_morning': 'Sage Peridot Morning',
     'amethyst_dawn_haze': 'Amethyst Dawn Haze',
-    'turquoise_amber_autumn': 'Turquoise Amber Autumn',
-    'sapphire_ash_morning': 'Sapphire Ash Morning',
     'royal_glimmer': 'Royal Glimmer',
     'neptune': 'Neptune',
     'tropical_heat': 'Tropical Heat',
@@ -173,8 +164,6 @@ THEME_DISPLAY_NAMES = {
     'festive_eve': 'Festive Eve',
     'freshly_squeezed': 'Freshly Squeezed',
     'jelly_shoes': 'Jelly Shoes',
-    'gossamer': 'Gossamer',
-    'clockwork': 'Clockwork',
     'lemon_granite_morning': 'Lemon Granite Morning',
     'arctic_reflection': 'Arctic Reflection',
     'slate': 'Slate',
@@ -260,16 +249,16 @@ THEME_PALETTES = {
         'bg-tertiary-hover': '#3c4850', 'text-primary': '#d1ded3', 'text-muted': '#7c8885',
         'border-color': '#707c4f', 'accent': '#a4b07e', 'accent-hover': '#8b966b',
     },
-    # --- Minimal & Neutral (from Figma's "53 Unique Website Color Schemes") ---
+    # --- Minimal & Neutral (from Figma's "53 Unique Website Color Schemes", converted to dark backgrounds) ---
     'ink_wash': {
         'bg-primary': '#202020', 'bg-secondary': '#323232', 'bg-tertiary': '#444444',
         'bg-tertiary-hover': '#4b4b4b', 'text-primary': '#e6e6e6', 'text-muted': '#9e9e9e',
         'border-color': '#494949', 'accent': '#2990d6', 'accent-hover': '#2173ab',
     },
     'jade_pebble_morning': {
-        'bg-primary': '#f2f4f1', 'bg-secondary': '#ffffff', 'bg-tertiary': '#edefeb',
-        'bg-tertiary-hover': '#e0e5dc', 'text-primary': '#242522', 'text-muted': '#6b7066',
-        'border-color': '#d1d6cd', 'accent': '#659539', 'accent-hover': '#4c702b',
+        'bg-primary': '#242d24', 'bg-secondary': '#344134', 'bg-tertiary': '#445544',
+        'bg-tertiary-hover': '#4b5e4b', 'text-primary': '#e5e6e5', 'text-muted': '#9ba19b',
+        'border-color': '#495b49', 'accent': '#9dca73', 'accent-hover': '#83bc4e',
     },
     'woodland': {
         'bg-primary': '#323220', 'bg-secondary': '#48482e', 'bg-tertiary': '#5d5d3c',
@@ -277,50 +266,30 @@ THEME_PALETTES = {
         'border-color': '#646440', 'accent': '#acc927', 'accent-hover': '#879e1f',
     },
     'graphite': {
-        'bg-primary': '#f4f1f1', 'bg-secondary': '#ffffff', 'bg-tertiary': '#efebeb',
-        'bg-tertiary-hover': '#e5dcdc', 'text-primary': '#252222', 'text-muted': '#706666',
-        'border-color': '#d6cdcd', 'accent': '#d34646', 'accent-hover': '#ba2c2c',
-    },
-    'urban_slate': {
-        'bg-primary': '#f4f1f1', 'bg-secondary': '#ffffff', 'bg-tertiary': '#efebeb',
-        'bg-tertiary-hover': '#e5dcdc', 'text-primary': '#252222', 'text-muted': '#706666',
-        'border-color': '#d6cdcd', 'accent': '#2174ab', 'accent-hover': '#195780',
+        'bg-primary': '#2c2c26', 'bg-secondary': '#3f3f37', 'bg-tertiary': '#525247',
+        'bg-tertiary-hover': '#5a5a4f', 'text-primary': '#e6e6e5', 'text-muted': '#a0a09c',
+        'border-color': '#57574c', 'accent': '#e07b7b', 'accent-hover': '#d65252',
     },
     'pearl': {
-        'bg-primary': '#f2f1f4', 'bg-secondary': '#ffffff', 'bg-tertiary': '#ecebef',
-        'bg-tertiary-hover': '#dfdce5', 'text-primary': '#232225', 'text-muted': '#696670',
-        'border-color': '#d0cdd6', 'accent': '#bd7c3d', 'accent-hover': '#966331',
-    },
-    'vichy': {
-        'bg-primary': '#f4f1f1', 'bg-secondary': '#ffffff', 'bg-tertiary': '#efebeb',
-        'bg-tertiary-hover': '#e5dcdc', 'text-primary': '#252222', 'text-muted': '#706666',
-        'border-color': '#d6cdcd', 'accent': '#1d968b', 'accent-hover': '#156b63',
-    },
-    'sorbet': {
-        'bg-primary': '#f4f1f1', 'bg-secondary': '#ffffff', 'bg-tertiary': '#efebeb',
-        'bg-tertiary-hover': '#e5dcdc', 'text-primary': '#252222', 'text-muted': '#706666',
-        'border-color': '#d6cdcd', 'accent': '#c07b59', 'accent-hover': '#a7613f',
+        'bg-primary': '#292929', 'bg-secondary': '#3b3b3b', 'bg-tertiary': '#4d4d4d',
+        'bg-tertiary-hover': '#545454', 'text-primary': '#e6e6e6', 'text-muted': '#9e9e9e',
+        'border-color': '#525252', 'accent': '#d7ad84', 'accent-hover': '#ca935e',
     },
     'yacht_club': {
-        'bg-primary': '#f4f1f1', 'bg-secondary': '#ffffff', 'bg-tertiary': '#efebeb',
-        'bg-tertiary-hover': '#e5dcdc', 'text-primary': '#252222', 'text-muted': '#706666',
-        'border-color': '#d6cdcd', 'accent': '#97562b', 'accent-hover': '#6f3f20',
+        'bg-primary': '#322720', 'bg-secondary': '#48382e', 'bg-tertiary': '#5d493c',
+        'bg-tertiary-hover': '#675042', 'text-primary': '#e7e5e4', 'text-muted': '#a49d98',
+        'border-color': '#644e40', 'accent': '#c67139', 'accent-hover': '#9e5a2e',
     },
-    # --- Warm (from Figma's "53 Unique Website Color Schemes") ---
+    # --- Warm (from Figma's "53 Unique Website Color Schemes", converted to dark backgrounds) ---
     'amber_walnut_morning': {
         'bg-primary': '#292929', 'bg-secondary': '#3b3b3b', 'bg-tertiary': '#4d4d4d',
         'bg-tertiary-hover': '#545454', 'text-primary': '#e6e6e6', 'text-muted': '#9e9e9e',
         'border-color': '#525252', 'accent': '#d09070', 'accent-hover': '#c3724a',
     },
     'copper_aquamarine_dream': {
-        'bg-primary': '#f4f4f1', 'bg-secondary': '#ffffff', 'bg-tertiary': '#efefeb',
-        'bg-tertiary-hover': '#e5e5dc', 'text-primary': '#252522', 'text-muted': '#707066',
-        'border-color': '#d6d6cd', 'accent': '#bc5224', 'accent-hover': '#913f1c',
-    },
-    'cocoa_topaz_noonday': {
-        'bg-primary': '#322620', 'bg-secondary': '#48362e', 'bg-tertiary': '#5d473c',
-        'bg-tertiary-hover': '#674e42', 'text-primary': '#e7e5e4', 'text-muted': '#a49c98',
-        'border-color': '#644c40', 'accent': '#f1a04e', 'accent-hover': '#ed871f',
+        'bg-primary': '#202c32', 'bg-secondary': '#2e3f48', 'bg-tertiary': '#3c525d',
+        'bg-tertiary-hover': '#425a67', 'text-primary': '#e4e6e7', 'text-muted': '#98a0a4',
+        'border-color': '#405864', 'accent': '#d65d29', 'accent-hover': '#ab4a21',
     },
     'sandstone_aquamarine_serenity': {
         'bg-primary': '#322420', 'bg-secondary': '#48342e', 'bg-tertiary': '#5d443c',
@@ -333,9 +302,9 @@ THEME_PALETTES = {
         'border-color': '#645240', 'accent': '#d6b12a', 'accent-hover': '#ac8e21',
     },
     'seashell_garnet_afternoon': {
-        'bg-primary': '#f1f2f4', 'bg-secondary': '#ffffff', 'bg-tertiary': '#ebedef',
-        'bg-tertiary-hover': '#dce0e5', 'text-primary': '#222425', 'text-muted': '#666b70',
-        'border-color': '#cdd1d6', 'accent': '#da3e50', 'accent-hover': '#c02537',
+        'bg-primary': '#203232', 'bg-secondary': '#2e4848', 'bg-tertiary': '#3c5d5d',
+        'bg-tertiary-hover': '#426767', 'text-primary': '#e4e7e7', 'text-muted': '#98a4a4',
+        'border-color': '#406464', 'accent': '#f36878', 'accent-hover': '#ef394e',
     },
     'rose_quartz_evening': {
         'bg-primary': '#322024', 'bg-secondary': '#482e34', 'bg-tertiary': '#5d3c44',
@@ -348,102 +317,82 @@ THEME_PALETTES = {
         'border-color': '#525252', 'accent': '#f1854e', 'accent-hover': '#ed641f',
     },
     'fireside': {
-        'bg-primary': '#f4f2f1', 'bg-secondary': '#ffffff', 'bg-tertiary': '#efedeb',
-        'bg-tertiary-hover': '#e5e0dc', 'text-primary': '#252422', 'text-muted': '#706b66',
-        'border-color': '#d6d1cd', 'accent': '#ca7226', 'accent-hover': '#9f5a1e',
+        'bg-primary': '#322420', 'bg-secondary': '#48342e', 'bg-tertiary': '#5d443c',
+        'bg-tertiary-hover': '#674b42', 'text-primary': '#e7e5e4', 'text-muted': '#a49b98',
+        'border-color': '#644940', 'accent': '#d67929', 'accent-hover': '#ab6121',
     },
     'terrazzo': {
         'bg-primary': '#203232', 'bg-secondary': '#2e4848', 'bg-tertiary': '#3c5d5d',
         'bg-tertiary-hover': '#426767', 'text-primary': '#e4e7e7', 'text-muted': '#98a4a4',
         'border-color': '#406464', 'accent': '#ecad6f', 'accent-hover': '#e69342',
     },
-    # --- Cool (from Figma's "53 Unique Website Color Schemes") ---
+    # --- Cool (from Figma's "53 Unique Website Color Schemes", converted to dark backgrounds) ---
     'sapphire_nightfall_whisper': {
         'bg-primary': '#202932', 'bg-secondary': '#2e3b48', 'bg-tertiary': '#3c4c5d',
         'bg-tertiary-hover': '#425467', 'text-primary': '#e4e6e7', 'text-muted': '#989ea4',
         'border-color': '#405264', 'accent': '#297fd6', 'accent-hover': '#2166ab',
     },
     'marina': {
-        'bg-primary': '#f1f3f4', 'bg-secondary': '#ffffff', 'bg-tertiary': '#ebeeef',
-        'bg-tertiary-hover': '#dce2e5', 'text-primary': '#222425', 'text-muted': '#666d70',
-        'border-color': '#cdd3d6', 'accent': '#3e8cda', 'accent-hover': '#2572c0',
+        'bg-primary': '#322720', 'bg-secondary': '#48382e', 'bg-tertiary': '#5d493c',
+        'bg-tertiary-hover': '#675042', 'text-primary': '#e7e5e4', 'text-muted': '#a49d98',
+        'border-color': '#644e40', 'accent': '#76ade5', 'accent-hover': '#4b93dd',
     },
     'emerald_lavender_lake': {
-        'bg-primary': '#f1f4f4', 'bg-secondary': '#ffffff', 'bg-tertiary': '#ebefef',
-        'bg-tertiary-hover': '#dce5e5', 'text-primary': '#222525', 'text-muted': '#667070',
-        'border-color': '#cdd6d6', 'accent': '#239f58', 'accent-hover': '#1a7541',
+        'bg-primary': '#203228', 'bg-secondary': '#2e4839', 'bg-tertiary': '#3c5d4a',
+        'bg-tertiary-hover': '#426752', 'text-primary': '#e4e7e5', 'text-muted': '#98a49d',
+        'border-color': '#40644f', 'accent': '#2ed174', 'accent-hover': '#25a75d',
     },
     'sage_peridot_morning': {
-        'bg-primary': '#f1f4f1', 'bg-secondary': '#ffffff', 'bg-tertiary': '#ebefeb',
-        'bg-tertiary-hover': '#dce5dc', 'text-primary': '#222522', 'text-muted': '#667066',
-        'border-color': '#cdd6cd', 'accent': '#1f9e83', 'accent-hover': '#177360',
+        'bg-primary': '#203220', 'bg-secondary': '#2e482e', 'bg-tertiary': '#3c5d3c',
+        'bg-tertiary-hover': '#426742', 'text-primary': '#e4e7e4', 'text-muted': '#98a498',
+        'border-color': '#406440', 'accent': '#20d1af', 'accent-hover': '#19a58a',
     },
     'amethyst_dawn_haze': {
         'bg-primary': '#242032', 'bg-secondary': '#342e48', 'bg-tertiary': '#443c5d',
         'bg-tertiary-hover': '#4b4267', 'text-primary': '#e5e4e7', 'text-muted': '#9b98a4',
         'border-color': '#494064', 'accent': '#ccba27', 'accent-hover': '#a1931f',
     },
-    'turquoise_amber_autumn': {
-        'bg-primary': '#322620', 'bg-secondary': '#48362e', 'bg-tertiary': '#5d473c',
-        'bg-tertiary-hover': '#674e42', 'text-primary': '#e7e5e4', 'text-muted': '#a49c98',
-        'border-color': '#644c40', 'accent': '#d66329', 'accent-hover': '#ab4f21',
-    },
-    'sapphire_ash_morning': {
-        'bg-primary': '#f1f2f4', 'bg-secondary': '#ffffff', 'bg-tertiary': '#ebecef',
-        'bg-tertiary-hover': '#dcdfe5', 'text-primary': '#222325', 'text-muted': '#666970',
-        'border-color': '#cdd0d6', 'accent': '#356a8d', 'accent-hover': '#274e68',
-    },
     'royal_glimmer': {
         'bg-primary': '#1f312d', 'bg-secondary': '#2d4741', 'bg-tertiary': '#3b5c56',
         'bg-tertiary-hover': '#41665e', 'text-primary': '#e4e7e7', 'text-muted': '#98a4a2',
         'border-color': '#3f635b', 'accent': '#29d6b4', 'accent-hover': '#21ab90',
     },
     'neptune': {
-        'bg-primary': '#f1f3f4', 'bg-secondary': '#ffffff', 'bg-tertiary': '#ebeeef',
-        'bg-tertiary-hover': '#dce2e5', 'text-primary': '#222425', 'text-muted': '#666d70',
-        'border-color': '#cdd3d6', 'accent': '#248fb8', 'accent-hover': '#1c6e8d',
+        'bg-primary': '#203232', 'bg-secondary': '#2e4848', 'bg-tertiary': '#3c5d5d',
+        'bg-tertiary-hover': '#426767', 'text-primary': '#e4e7e7', 'text-muted': '#98a4a4',
+        'border-color': '#406464', 'accent': '#68ccf3', 'accent-hover': '#39bcef',
     },
-    # --- Vibrant & Bold (from Figma's "53 Unique Website Color Schemes") ---
+    # --- Vibrant & Bold (from Figma's "53 Unique Website Color Schemes", converted to dark backgrounds) ---
     'tropical_heat': {
-        'bg-primary': '#f4f3f1', 'bg-secondary': '#ffffff', 'bg-tertiary': '#efeeeb',
-        'bg-tertiary-hover': '#e5e3dc', 'text-primary': '#252522', 'text-muted': '#706e66',
-        'border-color': '#d6d4cd', 'accent': '#ca5226', 'accent-hover': '#9f411e',
+        'bg-primary': '#203232', 'bg-secondary': '#2e4848', 'bg-tertiary': '#3c5d5d',
+        'bg-tertiary-hover': '#426767', 'text-primary': '#e4e7e7', 'text-muted': '#98a4a4',
+        'border-color': '#406464', 'accent': '#d65729', 'accent-hover': '#ab4621',
     },
     'celestial': {
-        'bg-primary': '#f4f4f1', 'bg-secondary': '#ffffff', 'bg-tertiary': '#efefeb',
-        'bg-tertiary-hover': '#e5e4dc', 'text-primary': '#252522', 'text-muted': '#707066',
-        'border-color': '#d6d5cd', 'accent': '#918b1c', 'accent-hover': '#666214',
+        'bg-primary': '#323220', 'bg-secondary': '#48482e', 'bg-tertiary': '#5d5d3c',
+        'bg-tertiary-hover': '#676742', 'text-primary': '#e7e7e4', 'text-muted': '#a4a498',
+        'border-color': '#646440', 'accent': '#cbc026', 'accent-hover': '#a0971e',
     },
     'festive_eve': {
-        'bg-primary': '#f2f1f4', 'bg-secondary': '#ffffff', 'bg-tertiary': '#ecebef',
-        'bg-tertiary-hover': '#dfdce5', 'text-primary': '#232225', 'text-muted': '#696670',
-        'border-color': '#d0cdd6', 'accent': '#733eda', 'accent-hover': '#5a25c0',
+        'bg-primary': '#202b32', 'bg-secondary': '#2e3e48', 'bg-tertiary': '#3c515d',
+        'bg-tertiary-hover': '#425a67', 'text-primary': '#e4e6e7', 'text-muted': '#98a0a4',
+        'border-color': '#405764', 'accent': '#8f5cf2', 'accent-hover': '#6f2dee',
     },
     'freshly_squeezed': {
-        'bg-primary': '#f4f3f1', 'bg-secondary': '#ffffff', 'bg-tertiary': '#efeeeb',
-        'bg-tertiary-hover': '#e5e2dc', 'text-primary': '#252422', 'text-muted': '#706d66',
-        'border-color': '#d6d3cd', 'accent': '#a28320', 'accent-hover': '#776118',
+        'bg-primary': '#322d20', 'bg-secondary': '#48412e', 'bg-tertiary': '#5d553c',
+        'bg-tertiary-hover': '#675e42', 'text-primary': '#e7e6e4', 'text-muted': '#a4a198',
+        'border-color': '#645b40', 'accent': '#d6ab29', 'accent-hover': '#ab8921',
     },
     'jelly_shoes': {
-        'bg-primary': '#f3f1f4', 'bg-secondary': '#ffffff', 'bg-tertiary': '#eeebef',
-        'bg-tertiary-hover': '#e1dce5', 'text-primary': '#242225', 'text-muted': '#6c6670',
-        'border-color': '#d2cdd6', 'accent': '#9d3eda', 'accent-hover': '#8325c0',
-    },
-    # --- Modern (from Figma's "53 Unique Website Color Schemes") ---
-    'gossamer': {
-        'bg-primary': '#f4f1f1', 'bg-secondary': '#ffffff', 'bg-tertiary': '#efebeb',
-        'bg-tertiary-hover': '#e5dcdc', 'text-primary': '#252222', 'text-muted': '#706666',
-        'border-color': '#d6cdcd', 'accent': '#d95c37', 'accent-hover': '#ba4623',
-    },
-    'clockwork': {
-        'bg-primary': '#f4f1f1', 'bg-secondary': '#ffffff', 'bg-tertiary': '#efebeb',
-        'bg-tertiary-hover': '#e5dcdc', 'text-primary': '#252222', 'text-muted': '#706666',
-        'border-color': '#d6cdcd', 'accent': '#d26c28', 'accent-hover': '#a75620',
+        'bg-primary': '#242032', 'bg-secondary': '#342e48', 'bg-tertiary': '#443c5d',
+        'bg-tertiary-hover': '#4b4267', 'text-primary': '#e5e4e7', 'text-muted': '#9b98a4',
+        'border-color': '#494064', 'accent': '#bc68f3', 'accent-hover': '#a739ef',
     },
+    # --- Modern (from Figma's "53 Unique Website Color Schemes", converted to dark backgrounds) ---
     'lemon_granite_morning': {
-        'bg-primary': '#f4f1f1', 'bg-secondary': '#ffffff', 'bg-tertiary': '#efebeb',
-        'bg-tertiary-hover': '#e5dcdc', 'text-primary': '#252222', 'text-muted': '#706666',
-        'border-color': '#d6cdcd', 'accent': '#89831b', 'accent-hover': '#5e5a13',
+        'bg-primary': '#202c32', 'bg-secondary': '#2e3f48', 'bg-tertiary': '#3c525d',
+        'bg-tertiary-hover': '#425a67', 'text-primary': '#e4e6e7', 'text-muted': '#98a0a4',
+        'border-color': '#405864', 'accent': '#c9bf27', 'accent-hover': '#9e961f',
     },
     'arctic_reflection': {
         'bg-primary': '#202c32', 'bg-secondary': '#2e3f48', 'bg-tertiary': '#3c525d',
@@ -451,9 +400,9 @@ THEME_PALETTES = {
         'border-color': '#405864', 'accent': '#4693b9', 'accent-hover': '#387694',
     },
     'slate': {
-        'bg-primary': '#f4f1f1', 'bg-secondary': '#ffffff', 'bg-tertiary': '#efebeb',
-        'bg-tertiary-hover': '#e5dcdc', 'text-primary': '#252222', 'text-muted': '#706666',
-        'border-color': '#d6cdcd', 'accent': '#1f9e31', 'accent-hover': '#177324',
+        'bg-primary': '#262c26', 'bg-secondary': '#373f37', 'bg-tertiary': '#475247',
+        'bg-tertiary-hover': '#4f5a4f', 'text-primary': '#e5e6e5', 'text-muted': '#9ca09c',
+        'border-color': '#4c574c', 'accent': '#1ad236', 'accent-hover': '#14a52a',
     },
     'autumn_luxe': {
         'bg-primary': '#303020', 'bg-secondary': '#45452e', 'bg-tertiary': '#5b5b3d',
@@ -482,11 +431,11 @@ THEME_PALETTES = {
 # neutral / Warm / Cool / Vibrant and bold / Modern" section headings, so
 # browsing the dropdown still mirrors how the original schemes were curated.
 WEBSITE_SCHEME_CATEGORIES = {
-    'Minimal & Neutral': ['ink_wash', 'jade_pebble_morning', 'woodland', 'graphite', 'urban_slate', 'pearl', 'vichy', 'sorbet', 'yacht_club'],
-    'Warm': ['amber_walnut_morning', 'copper_aquamarine_dream', 'cocoa_topaz_noonday', 'sandstone_aquamarine_serenity', 'honey_opal_sunset', 'seashell_garnet_afternoon', 'rose_quartz_evening', 'calcite', 'fireside', 'terrazzo'],
-    'Cool': ['sapphire_nightfall_whisper', 'marina', 'emerald_lavender_lake', 'sage_peridot_morning', 'amethyst_dawn_haze', 'turquoise_amber_autumn', 'sapphire_ash_morning', 'royal_glimmer', 'neptune'],
+    'Minimal & Neutral': ['ink_wash', 'jade_pebble_morning', 'woodland', 'graphite', 'pearl', 'yacht_club'],
+    'Warm': ['amber_walnut_morning', 'copper_aquamarine_dream', 'sandstone_aquamarine_serenity', 'honey_opal_sunset', 'seashell_garnet_afternoon', 'rose_quartz_evening', 'calcite', 'fireside', 'terrazzo'],
+    'Cool': ['sapphire_nightfall_whisper', 'marina', 'emerald_lavender_lake', 'sage_peridot_morning', 'amethyst_dawn_haze', 'royal_glimmer', 'neptune'],
     'Vibrant & Bold': ['tropical_heat', 'celestial', 'festive_eve', 'freshly_squeezed', 'jelly_shoes'],
-    'Modern': ['gossamer', 'clockwork', 'lemon_granite_morning', 'arctic_reflection', 'slate', 'autumn_luxe', 'inked', 'wraith', 'urban_nocturne'],
+    'Modern': ['lemon_granite_morning', 'arctic_reflection', 'slate', 'autumn_luxe', 'inked', 'wraith', 'urban_nocturne'],
 }
 
 # How each choice resolves to an actual CSS value. Keeping this server-side
diff --git a/tools/generate_website_scheme_themes.py b/tools/generate_website_scheme_themes.py
index c176e06..8029540 100644
--- a/tools/generate_website_scheme_themes.py
+++ b/tools/generate_website_scheme_themes.py
@@ -1,5 +1,5 @@
 """
-One-off tool that generated the 53 "website scheme" theme entries in
+One-off tool behind the 34 "website scheme" theme entries in
 THEME_PALETTES/THEME_DISPLAY_NAMES (offlineu_core.py), sourced from Figma's
 "53 Unique Website Color Schemes" resource page:
 https://www.figma.com/resource-library/website-color-schemes/
@@ -8,22 +8,36 @@ That page has no raw hex data - each scheme is a rendered mockup
 screenshot, not a swatch grid - so website_scheme_swatches.json (checked in
 alongside this script) holds dominant colors already extracted from those
 53 images via canvas pixel-histogram sampling in a browser, one entry per
-scheme: {n, name, colors: [{hex, pct}, ...]}. This script turns that raw
+scheme: {n, name, colors: [{hex, pct}, ...]}. build_theme() turns that raw
 material into an actual UI palette per scheme (bg/text/accent, matching
-THEME_PALETTES' shape), then nudges lightness as needed so every result
-clears the same contrast bars this file's checks apply: text-vs-background,
-accent-vs-background, and accent-vs-white (buttons always use white text -
-see .btn in course_dashboard.html - so a too-bright accent needs catching
-even when it reads fine against the background alone).
+THEME_PALETTES' shape), then nudges lightness/saturation as needed so every
+result clears the same contrast bars this file's checks apply:
+text-vs-background, accent-vs-background, and accent-vs-white (buttons
+always use white text - see .btn in course_dashboard.html - so a too-bright
+accent needs catching even when it reads fine against the background
+alone), and so accents don't land at the full saturation that reads as
+neon in the mid-lightness band.
 
-Not a live pipeline - re-running it regenerates the exact same 53 themes
-from the same frozen swatch data. To add more schemes, extract their
-dominant colors the same way (see the canvas-sampling approach used
-in-session; not scripted here) and append to the JSON, then rerun and
-splice the output into offlineu_core.py by hand.
+Running this file directly (see __main__ below) auto-detects each scheme's
+own mood from its swatches and writes all 53 as candidates - that's NOT
+what's actually shipped. The source material is mostly light-mode
+marketing mockups, so the first pass over-represented near-white
+backgrounds; the shipped 34 all use build_theme(entry, force_mood='dark')
+instead (every one of the 53 converted to a dark/colored background), then
+had duplicates pruned by measuring real color distance (hue + lightness +
+saturation, background and accent both) between every pair, tight enough
+to only catch genuine near-twins - not something this script's __main__
+does for you. That curation was one-off analysis, not captured as a single
+rerunnable command; to redo it, call build_theme(entry, force_mood='dark')
+per scheme, then de-duplicate the results the same way before splicing
+into offlineu_core.py by hand.
+
+To add more schemes: extract their dominant colors the same way (see the
+canvas-sampling approach used originally; not scripted here) and append to
+the JSON, then rerun.
 
 Usage: python3 generate_website_scheme_themes.py
-Writes generated_themes.json with the full computed palette per scheme.
+Writes generated_themes.json with all 53 candidates, auto-detected mood.
 """
 import colorsys
 import json
@@ -93,7 +107,7 @@ def tame_accent_saturation(s, l):
     return min(s, 0.85)
 
 
-def build_theme(entry):
+def build_theme(entry, force_mood=None):
     name = entry['name']
     swatches = entry['colors']
     parsed = []
@@ -107,8 +121,13 @@ def build_theme(entry):
     if not content:
         content = parsed
 
-    darkest_l = min(p['l'] for p in content)
-    is_dark = darkest_l < 0.28
+    if force_mood == 'dark':
+        is_dark = True
+    elif force_mood == 'light':
+        is_dark = False
+    else:
+        darkest_l = min(p['l'] for p in content)
+        is_dark = darkest_l < 0.28
 
     accent_candidates = [p for p in content if p['s'] > 0.25]
     if accent_candidates: