diff --git a/dashboard/src/utils/monacoTheme.ts b/dashboard/src/utils/monacoTheme.ts
new file mode 100644
index 000000000..2b69a5fd3
--- /dev/null
+++ b/dashboard/src/utils/monacoTheme.ts
@@ -0,0 +1,73 @@
+import type { editor } from "monaco-editor";
+
+/**
+ * Defines the custom "reactor" Monaco theme:
+ * - Transparent background so the reactor canvas shows through
+ * - Cherenkov blue accents for UI elements
+ * - Industrial precision aesthetic
+ */
+export function defineReactorMonacoTheme() {
+  // Access monaco via the global
+  const monaco = (window as any).monaco;
+  if (!monaco) return;
+
+  monaco.editor.defineTheme("reactor-dark", {
+    base: "vs-dark",
+    inherit: true,
+    rules: [
+      { token: "", foreground: "E4E1E6", background: "00000000" },
+      { token: "comment", foreground: "5C6370", fontStyle: "italic" },
+      { token: "keyword", foreground: "7DD9CC" },
+      { token: "string", foreground: "69F0AE" },
+      { token: "number", foreground: "FFD54F" },
+      { token: "type", foreground: "A1C9FF" },
+      { token: "delimiter", foreground: "8E9099" },
+      { token: "variable", foreground: "E4E1E6" },
+    ],
+    colors: {
+      "editor.background": "#00000000",
+      "editor.foreground": "#E4E1E6",
+      "editor.lineHighlightBackground": "#1A3A5C22",
+      "editor.lineHighlightBorder": "#00F2FF18",
+      "editor.selectionBackground": "#005FB044",
+      "editor.inactiveSelectionBackground": "#005FB022",
+      "editorLineNumber.foreground": "#44474F",
+      "editorLineNumber.activeForeground": "#00F2FF",
+      "editorCursor.foreground": "#00F2FF",
+      "editorWhitespace.foreground": "#1A1A22",
+      "editorIndentGuide.background": "#1A1A22",
+      "editorIndentGuide.activeBackground": "#00F2FF22",
+      "editor.wordHighlightBackground": "#005FB018",
+      "editorGutter.background": "#00000000",
+      "scrollbar.shadow": "#00000000",
+      "scrollbarSlider.background": "#1A3A5C44",
+      "scrollbarSlider.hoverBackground": "#1A3A5C88",
+      "scrollbarSlider.activeBackground": "#00F2FF44",
+    },
+  } satisfies editor.IStandaloneThemeData);
+}
+
+/**
+ * Highlight error lines in Monaco editor with Cherenkov red glow
+ */
+export function setMonacoEditorErrors(
+  monaco: any,
+  editorInstance: editor.IStandaloneCodeEditor | null,
+  errors: Array<{ line: number; message: string }>,
+) {
+  if (!editorInstance || !monaco) return;
+
+  const model = editorInstance.getModel();
+  if (!model) return;
+
+  const markers: editor.IMarkerData[] = errors.map((err) => ({
+    severity: monaco.MarkerSeverity.Error,
+    message: err.message,
+    startLineNumber: err.line,
+    startColumn: 1,
+    endLineNumber: err.line,
+    endColumn: model.getLineMaxColumn(err.line),
+  }));
+
+  monaco.editor.setModelMarkers(model, "reactor-errors", markers);
+}
diff --git a/dashboard/src/views/ConfigPage.vue b/dashboard/src/views/ConfigPage.vue
index 3a5bf7561..59a921dfb 100644
--- a/dashboard/src/views/ConfigPage.vue
+++ b/dashboard/src/views/ConfigPage.vue
@@ -147,43 +147,48 @@
     transition="dialog-bottom-transition"
     scrollable
   >
-    <v-card>
-      <v-toolbar color="primary" dark>
-        <v-btn icon @click="codeEditorDialog = false">
-          <v-icon>mdi-close</v-icon>
-        </v-btn>
-        <v-toolbar-title>{{ tm("codeEditor.title") }}</v-toolbar-title>
-        <v-spacer />
-        <v-toolbar-items style="display: flex; align-items: center">
-          <v-btn
-            style="margin-left: 16px"
-            size="small"
-            @click="configToString()"
-          >
-            {{ tm("editor.revertCode") }}
+    <div class="editor-reactor-container">
+      <v-card class="editor-glass-card">
+        <v-toolbar
+          class="editor-toolbar"
+          elevation="0"
+        >
+          <v-btn icon @click="codeEditorDialog = false">
+            <v-icon>mdi-close</v-icon>
           </v-btn>
-          <v-btn
-            v-if="config_data_has_changed"
-            style="margin-left: 16px"
-            size="small"
-            @click="applyStrConfig()"
-          >
-            {{ tm("editor.applyConfig") }}
-          </v-btn>
-          <small style="margin-left: 16px"
-            >💡 {{ tm("editor.applyTip") }}</small
-          >
-        </v-toolbar-items>
-      </v-toolbar>
-      <v-card-text class="pa-0">
-        <VueMonacoEditor
-          v-model:value="config_data_str"
-          language="json"
-          theme="vs-dark"
-          style="height: calc(100vh - 64px)"
-        />
-      </v-card-text>
-    </v-card>
+          <v-toolbar-title>{{ tm("codeEditor.title") }}</v-toolbar-title>
+          <v-spacer />
+          <v-toolbar-items style="display: flex; align-items: center">
+            <v-btn
+              style="margin-left: 16px"
+              size="small"
+              @click="configToString()"
+            >
+              {{ tm("editor.revertCode") }}
+            </v-btn>
+            <v-btn
+              v-if="config_data_has_changed"
+              style="margin-left: 16px"
+              size="small"
+              @click="applyStrConfig()"
+            >
+              {{ tm("editor.applyConfig") }}
+            </v-btn>
+            <small style="margin-left: 16px"
+              >💡 {{ tm("editor.applyTip") }}</small
+            >
+          </v-toolbar-items>
+        </v-toolbar>
+        <v-card-text class="pa-0 editor-monaco-wrapper">
+          <VueMonacoEditor
+            v-model:value="config_data_str"
+            language="json"
+            theme="reactor-dark"
+            style="height: calc(100vh - 64px)"
+          />
+        </v-card-text>
+      </v-card>
+    </div>
   </v-dialog>
 
   <!-- Config Management Dialog -->
@@ -337,6 +342,7 @@ import {
 } from "@/utils/confirmDialog";
 import UnsavedChangesConfirmDialog from "@/components/config/UnsavedChangesConfirmDialog.vue";
 import { normalizeTextInput } from "@/utils/inputValue";
+import { defineReactorMonacoTheme } from "@/utils/monacoTheme";
 
 export default {
   name: "ConfigPage",
@@ -498,6 +504,9 @@ export default {
       }
     },
   },
+  beforeMount() {
+    defineReactorMonacoTheme();
+  },
   mounted() {
     const hashConfigType = this.extractConfigTypeFromHash(
       this.$route?.fullPath || "",
@@ -1105,4 +1114,47 @@ export default {
   padding: 0;
   border-radius: 0 0 16px 16px;
 }
+
+/* Reactor glassmorphism editor container */
+.editor-reactor-container {
+  width: 100vw;
+  height: 100vh;
+  background: rgba(10, 10, 12, 0.92);
+  backdrop-filter: blur(40px) saturate(1.3);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 32px;
+  box-sizing: border-box;
+}
+
+.editor-glass-card {
+  width: 100%;
+  max-width: 1400px;
+  height: calc(100vh - 64px);
+  background: rgba(15, 15, 22, 0.55) !important;
+  backdrop-filter: blur(24px) saturate(1.2);
+  border: 1px solid rgba(0, 242, 255, 0.15);
+  border-radius: 28px !important;
+  box-shadow:
+    inset 0 0 40px rgba(0, 0, 0, 0.6),
+    0 0 80px rgba(0, 26, 51, 0.4),
+    0 0 0 0.5px rgba(0, 242, 255, 0.05);
+  overflow: hidden;
+  display: flex;
+  flex-direction: column;
+}
+
+.editor-toolbar {
+  background: rgba(10, 10, 16, 0.8) !important;
+  border-bottom: 1px solid rgba(0, 242, 255, 0.08) !important;
+  backdrop-filter: blur(12px);
+  flex-shrink: 0;
+}
+
+.editor-monaco-wrapper {
+  flex: 1;
+  overflow: hidden;
+  border-radius: 0 0 28px 28px;
+}
 </style>