theme: dashboard approach — green background, chat text areas (surface-chat/presentation secondary) highlighted white

assets/custom.css

@@ -11,9 +11,9 @@
 
 html.light {
   --surface-primary: 234 243 234;   /* #eaf3ea — dashboard app green background */
-  --surface-secondary: 223 237 222; /* deeper step of the dashboard green */
-  --surface-tertiary: 213 228 211;
-  --surface-hover: 223 237 222;
+  --surface-secondary: 255 255 255; /* sidebar + composer box: white cards on green */
+  --surface-tertiary: 240 246 239;
+  --surface-hover: 223 237 222;     /* visible green hover on white surfaces */
   --surface-submit: 91 140 90;      /* --green-deep #5b8c5a */
   --surface-submit-hover: 107 168 107; /* --green-mid #6ba86b */
   --accent-primary: 91 140 90;      /* --green-deep */
@@ -24,7 +24,7 @@ html.light {
   --text-secondary: 107 122 98;     /* --muted #6b7a62 */
   --border-light: 205 224 203;      /* green-tinted border */
   --presentation: 234 243 234;      /* chat-form backdrop (was white) */
-  --surface-chat: 234 243 234;      /* messages area (was white) */
+  --surface-chat: 255 255 255;      /* chat box text areas: white, highlighted on green */
   --surface-composer-hover: 223 237 222;
 }