Fix invisible caret and placeholder in text inputs: add caret-color cyan, consolidate placeholder styles

app.py

@@ -632,10 +632,6 @@ st.markdown("""
 
 
 /* ── Textarea placeholder ── */
-.stTextArea textarea::placeholder {
-    color: var(--text-muted) !important;
-    opacity: 1 !important;
-}
 .stTextInput input::placeholder {
     color: var(--text-muted) !important;
     opacity: 1 !important;
@@ -728,6 +724,11 @@ section[data-testid="stSidebar"] .block-container {
     font-family: var(--font-main) !important;
     font-size: 0.9rem !important;
     transition: border-color 0.2s ease !important;
+    caret-color: var(--cyan) !important;
+}
+.stTextArea textarea::placeholder, .stTextInput input::placeholder {
+    color: var(--text-muted) !important;
+    opacity: 1 !important;
 }
 .stTextArea textarea:focus, .stTextInput input:focus {
     border-color: var(--cyan) !important;