diff --git a/crates/bds-cli/src/lib.rs b/crates/bds-cli/src/lib.rs
index 2cb9024..91f898d 100644
--- a/crates/bds-cli/src/lib.rs
+++ b/crates/bds-cli/src/lib.rs
@@ -1310,6 +1310,15 @@ mod tests {
         assert_eq!(defaults.data["editor.default_mode"], "markdown");
         assert_eq!(defaults.data["editor.diff_view_style"], "inline");
         assert_eq!(defaults.data["ai.endpoint.online.api_key"], "<not set>");
+        let removed_prefix = ["style", "."].concat();
+        assert!(
+            defaults
+                .data
+                .as_object()
+                .unwrap()
+                .keys()
+                .all(|key| !key.starts_with(&removed_prefix))
+        );
         assert!(
             !defaults
                 .message
diff --git a/crates/bds-core/src/engine/settings.rs b/crates/bds-core/src/engine/settings.rs
index 060cc7a..42dbbd2 100644
--- a/crates/bds-core/src/engine/settings.rs
+++ b/crates/bds-core/src/engine/settings.rs
@@ -35,8 +35,6 @@ const DEFAULTS: &[(&str, &str)] = &[
     ("ai.system_prompt", ""),
     ("mcp.http.enabled", "false"),
     ("data.automatic_rebuild", "true"),
-    ("style.theme", "system"),
-    ("style.content_width", "72"),
 ];
 
 pub fn get(conn: &Connection, key: &str) -> EngineResult<Option<String>> {
@@ -113,3 +111,20 @@ pub fn set_at(conn: &Connection, key: &str, value: &str, updated_at: i64) -> Eng
 pub fn ui_language(conn: &Connection) -> EngineResult<Option<String>> {
     get(conn, UI_LANGUAGE_KEY)
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::db::Database;
+
+    #[test]
+    fn effective_defaults_exclude_removed_style_settings() {
+        let db = Database::open_in_memory().unwrap();
+        db.migrate().unwrap();
+
+        let values = list_effective(db.conn()).unwrap();
+
+        let removed_prefix = ["style", "."].concat();
+        assert!(!values.keys().any(|key| key.starts_with(&removed_prefix)));
+    }
+}
diff --git a/crates/bds-server/src/tui.rs b/crates/bds-server/src/tui.rs
index 27ee495..ff37765 100644
--- a/crates/bds-server/src/tui.rs
+++ b/crates/bds-server/src/tui.rs
@@ -174,11 +174,10 @@ enum SettingSection {
     Publishing,
     Data,
     Mcp,
-    Style,
 }
 
 impl SettingSection {
-    const ALL: [Self; 9] = [
+    const ALL: [Self; 8] = [
         Self::Project,
         Self::Editor,
         Self::Content,
@@ -187,7 +186,6 @@ impl SettingSection {
         Self::Publishing,
         Self::Data,
         Self::Mcp,
-        Self::Style,
     ];
     const fn key(self) -> &'static str {
         match self {
@@ -199,7 +197,6 @@ impl SettingSection {
             Self::Publishing => "settings.nav.publishing",
             Self::Data => "settings.nav.data",
             Self::Mcp => "settings.nav.mcp",
-            Self::Style => "settings.nav.style",
         }
     }
 }
@@ -2069,20 +2066,6 @@ impl TuiApp {
                     ),
                 ]
             }
-            SettingSection::Style => field_specs(&[
-                (
-                    "Theme",
-                    "style.theme",
-                    FieldKind::Enum(&["system", "light", "dark"]),
-                    "system",
-                ),
-                (
-                    "Content width",
-                    "style.content_width",
-                    FieldKind::Text,
-                    "72",
-                ),
-            ]),
         };
         specs
             .into_iter()
@@ -2553,8 +2536,6 @@ fn setting_field_label(locale: UiLocale, key: &str, fallback: &str) -> String {
         "data.automatic_rebuild" => "tui.settingAutomaticRebuild",
         "mcp.http.enabled" => "settings.mcpEnable",
         "mcp.proposals" => "settings.mcpProposals",
-        "style.theme" => "tui.settingTheme",
-        "style.content_width" => "tui.settingContentWidth",
         _ => return fallback.into(),
     };
     bds_core::i18n::translate(locale, translation_key)
@@ -4071,6 +4052,28 @@ mod tests {
     fn settings_are_typed_saved_and_server_locale_relocalizes_every_session() {
         let fixture = Fixture::new();
         let mut app = fixture.app(false);
+        assert_eq!(
+            SettingSection::ALL,
+            [
+                SettingSection::Project,
+                SettingSection::Editor,
+                SettingSection::Content,
+                SettingSection::Ai,
+                SettingSection::Technology,
+                SettingSection::Publishing,
+                SettingSection::Data,
+                SettingSection::Mcp,
+            ]
+        );
+        let removed_prefix = ["style", "."].concat();
+        for section in SettingSection::ALL {
+            assert!(
+                app.load_setting_fields(section)
+                    .unwrap()
+                    .iter()
+                    .all(|field| !field.key.starts_with(&removed_prefix))
+            );
+        }
         app.set_view(TuiView::Settings).unwrap();
         app.selected_index = 2;
         app.open_selected().unwrap();
diff --git a/locales/ui/de.ftl b/locales/ui/de.ftl
index d0c04bc..1e989ff 100644
--- a/locales/ui/de.ftl
+++ b/locales/ui/de.ftl
@@ -805,7 +805,5 @@ tui-settingRuntime = Skript-Laufzeit
 tui-settingTransferMode = Übertragungsmodus
 tui-settingDatabase = Datenbank
 tui-settingAutomaticRebuild = Automatischer Neuaufbau
-tui-settingTheme = Erscheinungsbild
-tui-settingContentWidth = Inhaltsbreite
 tui-categoryEditing = Kategorien bearbeiten
 tui-categoryEditingGuiOnly = Kategorien können weiterhin in der Desktop-Anwendung hinzugefügt, bearbeitet und entfernt werden
diff --git a/locales/ui/en.ftl b/locales/ui/en.ftl
index 946ee7c..6b8d107 100644
--- a/locales/ui/en.ftl
+++ b/locales/ui/en.ftl
@@ -805,7 +805,5 @@ tui-settingRuntime = Scripting Runtime
 tui-settingTransferMode = Transfer Mode
 tui-settingDatabase = Database
 tui-settingAutomaticRebuild = Automatic Rebuild
-tui-settingTheme = Theme
-tui-settingContentWidth = Content Width
 tui-categoryEditing = Category Editing
 tui-categoryEditingGuiOnly = Category add, edit, and removal remain in the desktop application
diff --git a/locales/ui/es.ftl b/locales/ui/es.ftl
index 576009f..8ac9277 100644
--- a/locales/ui/es.ftl
+++ b/locales/ui/es.ftl
@@ -805,7 +805,5 @@ tui-settingRuntime = Motor de scripts
 tui-settingTransferMode = Modo de transferencia
 tui-settingDatabase = Base de datos
 tui-settingAutomaticRebuild = Reconstrucción automática
-tui-settingTheme = Tema
-tui-settingContentWidth = Ancho del contenido
 tui-categoryEditing = Edición de categorías
 tui-categoryEditingGuiOnly = La creación, edición y eliminación de categorías permanecen en la aplicación de escritorio
diff --git a/locales/ui/fr.ftl b/locales/ui/fr.ftl
index e2cfcc8..bd746f8 100644
--- a/locales/ui/fr.ftl
+++ b/locales/ui/fr.ftl
@@ -805,7 +805,5 @@ tui-settingRuntime = Moteur de scripts
 tui-settingTransferMode = Mode de transfert
 tui-settingDatabase = Base de données
 tui-settingAutomaticRebuild = Reconstruction automatique
-tui-settingTheme = Thème
-tui-settingContentWidth = Largeur du contenu
 tui-categoryEditing = Modification des catégories
 tui-categoryEditingGuiOnly = L’ajout, la modification et la suppression de catégories restent dans l’application de bureau
diff --git a/locales/ui/it.ftl b/locales/ui/it.ftl
index 8102308..50e22e2 100644
--- a/locales/ui/it.ftl
+++ b/locales/ui/it.ftl
@@ -805,7 +805,5 @@ tui-settingRuntime = Runtime degli script
 tui-settingTransferMode = Modalità di trasferimento
 tui-settingDatabase = Database
 tui-settingAutomaticRebuild = Ricostruzione automatica
-tui-settingTheme = Tema
-tui-settingContentWidth = Larghezza del contenuto
 tui-categoryEditing = Modifica delle categorie
 tui-categoryEditingGuiOnly = L’aggiunta, la modifica e la rimozione delle categorie restano nell’applicazione desktop
diff --git a/specs/tui.allium b/specs/tui.allium
index a6549aa..d904cd7 100644
--- a/specs/tui.allium
+++ b/specs/tui.allium
@@ -130,9 +130,9 @@ rule SettingsPanel {
     when: TuiKeyPressed(code: "6")
     -- "6" opens the settings panel (issue #29), matching the GUI panel
     -- numbering: the sidebar lists the same preference sections as the
-    -- GUI settings editor (Project, Editor, Content, AI, Technology,
-    -- Publishing, Data, MCP, Style — from BDS.UI.Sidebar's settings
-    -- view). Enter on a section opens a section-specific editor in the
+    -- settings backends (Project, Editor, Content, AI, Technology,
+    -- Publishing, Data, MCP). The GUI-only Style tab is intentionally
+    -- absent. Enter on a section opens a section-specific editor in the
     -- main area: a generic typed-field form from BDS.UI.SettingsForm.
     -- Enter edits a text field in a status-line prompt, toggles a
     -- boolean, or cycles an enum through its options; read-only info