Update app.py

app.py

@@ -1,6 +1,6 @@
 """
 PaperSearchPro - STRICT Hierarchical Keyword Search
-PREMIUM GUI with White Background and Modern Design
+PREMIUM GUI with White Background and Modern Design - FIXED TEXT VISIBILITY
 """
 
 import requests
@@ -10,19 +10,25 @@ from datetime import datetime
 import gradio as gr
 import tempfile
 
-# Custom CSS for premium white background design
+# Custom CSS for premium white background design - FIXED TEXT COLORS
 custom_css = """
+/* Import Inter font */
+@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');
+
 :root {
     --primary-color: #2563eb;
+    --primary-dark: #1d4ed8;
     --secondary-color: #7c3aed;
     --success-color: #10b981;
     --warning-color: #f59e0b;
     --danger-color: #ef4444;
-    --text-primary: #1f2937;
-    --text-secondary: #6b7280;
+    --text-primary: #111827;
+    --text-secondary: #4b5563;
+    --text-muted: #6b7280;
     --border-color: #e5e7eb;
     --bg-white: #ffffff;
     --bg-light: #f9fafb;
+    --bg-hover: #f3f4f6;
     --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
     --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
     --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
@@ -34,7 +40,13 @@ custom_css = """
 /* Main container */
 .gradio-container {
     background-color: var(--bg-light) !important;
-    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
+    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif !important;
+    color: var(--text-primary) !important;
+}
+
+/* All text elements */
+label, span, div, p, h1, h2, h3, h4, h5, h6 {
+    color: var(--text-primary) !important;
 }
 
 /* White cards */
@@ -52,14 +64,11 @@ custom_css = """
 }
 
 /* Headers */
-h1, h2, h3 {
-    color: var(--text-primary) !important;
-    font-weight: 600 !important;
-}
-
 h1 {
     font-size: 2rem !important;
-    margin-bottom: 1rem !important;
+    font-weight: 700 !important;
+    margin-bottom: 0.5rem !important;
+    color: var(--text-primary) !important;
 }
 
 h1 span {
@@ -68,21 +77,59 @@ h1 span {
     -webkit-text-fill-color: transparent;
 }
 
-/* Input fields */
-.gr-box, .gr-input, .gr-textarea {
+h3 {
+    font-size: 1.25rem !important;
+    font-weight: 600 !important;
+    color: var(--text-primary) !important;
+    margin-bottom: 1rem !important;
+}
+
+/* Input fields - FIXED TEXT COLOR */
+.gr-box, .gr-input, .gr-textarea, input, textarea, select {
     background-color: var(--bg-white) !important;
     border: 1px solid var(--border-color) !important;
     border-radius: var(--radius-md) !important;
-    padding: 0.5rem !important;
-    transition: border-color 0.3s, box-shadow 0.3s !important;
+    padding: 0.625rem !important;
+    color: var(--text-primary) !important;
+    font-size: 0.95rem !important;
+    transition: all 0.2s !important;
+}
+
+.gr-box::placeholder, .gr-input::placeholder, .gr-textarea::placeholder {
+    color: var(--text-muted) !important;
+    opacity: 0.7 !important;
 }
 
-.gr-box:focus, .gr-input:focus, .gr-textarea:focus {
+.gr-box:focus, .gr-input:focus, .gr-textarea:focus, input:focus, textarea:focus, select:focus {
     border-color: var(--primary-color) !important;
     box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1) !important;
     outline: none !important;
 }
 
+/* Labels - FIXED VISIBILITY */
+label, .gr-label {
+    color: var(--text-secondary) !important;
+    font-size: 0.875rem !important;
+    font-weight: 600 !important;
+    margin-bottom: 0.375rem !important;
+    display: block !important;
+}
+
+/* Dropdown/Select - FIXED */
+select, .gr-dropdown {
+    background-color: var(--bg-white) !important;
+    color: var(--text-primary) !important;
+    border: 1px solid var(--border-color) !important;
+    padding: 0.625rem !important;
+    border-radius: var(--radius-md) !important;
+    cursor: pointer !important;
+}
+
+select option {
+    background-color: var(--bg-white) !important;
+    color: var(--text-primary) !important;
+}
+
 /* Buttons */
 .gr-button-primary {
     background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)) !important;
@@ -91,7 +138,9 @@ h1 span {
     font-weight: 600 !important;
     padding: 0.75rem 1.5rem !important;
     border-radius: var(--radius-md) !important;
-    transition: transform 0.2s, box-shadow 0.2s !important;
+    transition: all 0.2s !important;
+    cursor: pointer !important;
+    font-size: 1rem !important;
 }
 
 .gr-button-primary:hover {
@@ -99,10 +148,6 @@ h1 span {
     box-shadow: var(--shadow-md) !important;
 }
 
-.gr-button-primary:active {
-    transform: translateY(0);
-}
-
 .gr-button-secondary {
     background-color: var(--bg-white) !important;
     border: 1px solid var(--border-color) !important;
@@ -111,22 +156,16 @@ h1 span {
     padding: 0.75rem 1.5rem !important;
     border-radius: var(--radius-md) !important;
     transition: all 0.2s !important;
+    cursor: pointer !important;
+    font-size: 1rem !important;
 }
 
 .gr-button-secondary:hover {
-    background-color: var(--bg-light) !important;
+    background-color: var(--bg-hover) !important;
     border-color: var(--text-secondary) !important;
 }
 
-/* Labels and text */
-label {
-    color: var(--text-secondary) !important;
-    font-size: 0.875rem !important;
-    font-weight: 500 !important;
-    margin-bottom: 0.25rem !important;
-}
-
-/* Dataframe/Table */
+/* Dataframe/Table - FIXED TEXT */
 .gr-dataframe {
     background-color: var(--bg-white) !important;
     border: 1px solid var(--border-color) !important;
@@ -137,6 +176,7 @@ label {
 .gr-dataframe table {
     border-collapse: separate !important;
     border-spacing: 0 !important;
+    width: 100% !important;
 }
 
 .gr-dataframe th {
@@ -144,14 +184,16 @@ label {
     color: var(--text-primary) !important;
     font-weight: 600 !important;
     font-size: 0.875rem !important;
-    padding: 0.75rem !important;
+    padding: 0.875rem !important;
     border-bottom: 2px solid var(--border-color) !important;
+    text-align: left !important;
 }
 
 .gr-dataframe td {
-    padding: 0.75rem !important;
+    padding: 0.875rem !important;
     border-bottom: 1px solid var(--border-color) !important;
     color: var(--text-primary) !important;
+    font-size: 0.875rem !important;
 }
 
 .gr-dataframe tr:last-child td {
@@ -167,104 +209,109 @@ label {
     background: linear-gradient(90deg, var(--primary-color), var(--secondary-color)) !important;
 }
 
-/* Checkbox */
-.gr-checkbox {
-    accent-color: var(--primary-color) !important;
+.gr-slider-value {
+    color: var(--text-primary) !important;
+    font-weight: 600 !important;
 }
 
-/* Tabs */
-.gr-tabs {
-    background-color: var(--bg-white) !important;
-    border-radius: var(--radius-lg) !important;
-    padding: 0.5rem !important;
+/* Checkbox - FIXED */
+.gr-checkbox {
+    accent-color: var(--primary-color) !important;
 }
 
-.gr-tabs .tab-nav {
-    border-bottom: 2px solid var(--border-color) !important;
+.gr-checkbox-label {
+    color: var(--text-primary) !important;
+    margin-left: 0.5rem !important;
 }
 
-.gr-tabs .tab-nav button {
-    color: var(--text-secondary) !important;
-    font-weight: 500 !important;
-    padding: 0.75rem 1.5rem !important;
-    border: none !important;
-    background: transparent !important;
-    transition: all 0.2s !important;
+/* Metric cards - FIXED */
+.metric-card {
+    background-color: var(--bg-white);
+    border-radius: var(--radius-lg);
+    padding: 1.25rem;
+    box-shadow: var(--shadow-sm);
+    border: 1px solid var(--border-color);
+    text-align: center;
 }
 
-.gr-tabs .tab-nav button.selected {
+.metric-value {
+    font-size: 2rem !important;
+    font-weight: 700 !important;
     color: var(--primary-color) !important;
-    border-bottom: 2px solid var(--primary-color) !important;
-}
-
-/* Info boxes */
-.info-box {
-    background: linear-gradient(135deg, #f0f9ff, #e6f7ff);
-    border-left: 4px solid var(--primary-color);
-    border-radius: var(--radius-md);
-    padding: 1rem;
-    margin: 1rem 0;
+    line-height: 1.2 !important;
+    margin: 0 !important;
 }
 
-.warning-box {
-    background: linear-gradient(135deg, #fef3c7, #fffbeb);
-    border-left: 4px solid var(--warning-color);
-    border-radius: var(--radius-md);
-    padding: 1rem;
-    margin: 1rem 0;
-}
-
-.success-box {
-    background: linear-gradient(135deg, #d1fae5, #ecfdf5);
-    border-left: 4px solid var(--success-color);
-    border-radius: var(--radius-md);
-    padding: 1rem;
-    margin: 1rem 0;
+.metric-label {
+    font-size: 0.875rem !important;
+    color: var(--text-secondary) !important;
+    margin-top: 0.5rem !important;
+    font-weight: 500 !important;
 }
 
-/* Keyword badges */
+/* Keyword badges - FIXED */
 .keyword-badge {
     display: inline-block;
-    padding: 0.25rem 0.75rem;
+    padding: 0.375rem 1rem;
     border-radius: 9999px;
     font-size: 0.875rem;
-    font-weight: 500;
+    font-weight: 600;
     margin: 0.25rem;
 }
 
 .keyword-required {
     background-color: #fee2e2;
-    color: var(--danger-color);
+    color: #b91c1c !important;
     border: 1px solid #fecaca;
 }
 
 .keyword-optional {
     background-color: #dcfce7;
-    color: var(--success-color);
+    color: #166534 !important;
     border: 1px solid #bbf7d0;
 }
 
-/* Metrics cards */
-.metric-card {
-    background-color: var(--bg-white);
-    border-radius: var(--radius-lg);
-    padding: 1.25rem;
-    box-shadow: var(--shadow-sm);
-    border: 1px solid var(--border-color);
-    text-align: center;
+/* Info boxes - FIXED TEXT */
+.info-box {
+    background: linear-gradient(135deg, #f0f9ff, #e6f7ff);
+    border-left: 4px solid var(--primary-color);
+    border-radius: var(--radius-md);
+    padding: 1rem;
+    margin: 1rem 0;
 }
 
-.metric-value {
-    font-size: 1.875rem;
-    font-weight: 700;
-    color: var(--primary-color);
-    line-height: 1;
+.info-box strong, .info-box p, .info-box div {
+    color: var(--text-primary) !important;
 }
 
-.metric-label {
-    font-size: 0.875rem;
-    color: var(--text-secondary);
-    margin-top: 0.5rem;
+/* Status text */
+.gr-status, .gr-message {
+    color: var(--text-primary) !important;
+    font-size: 0.875rem !important;
+}
+
+/* Markdown content */
+.gr-markdown {
+    color: var(--text-primary) !important;
+}
+
+.gr-markdown p, .gr-markdown h1, .gr-markdown h2, .gr-markdown h3 {
+    color: var(--text-primary) !important;
+}
+
+/* Links */
+a {
+    color: var(--primary-color) !important;
+    text-decoration: none !important;
+}
+
+a:hover {
+    text-decoration: underline !important;
+}
+
+/* Ensure all text is visible */
+* {
+    color: inherit;
 }
 """
 
@@ -485,7 +532,7 @@ def create_interface():
         gr.HTML("""
         <div style='text-align: center; padding: 2rem 0;'>
             <h1><span>📱 PaperSearchPro</span></h1>
-            <p style='color: #6b7280; font-size: 1.1rem;'>Academic Paper Search with Hierarchical Keywords</p>
+            <p style='color: #4b5563; font-size: 1.1rem;'>Academic Paper Search with Hierarchical Keywords</p>
         </div>
         """)
         
@@ -513,8 +560,8 @@ def create_interface():
             
             # Keywords section with badges
             gr.HTML("""
-            <div style='margin: 1rem 0;'>
-                <h3 style='margin-bottom: 0.5rem;'>🔑 Keyword Hierarchy</h3>
+            <div style='margin: 1.5rem 0;'>
+                <h3 style='color: #111827; margin-bottom: 0.75rem;'>🔑 Keyword Hierarchy</h3>
                 <div>
                     <span class='keyword-badge keyword-required'>Keyword 1: REQUIRED</span>
                     <span class='keyword-badge keyword-required'>Keyword 2: REQUIRED</span>
@@ -537,7 +584,7 @@ def create_interface():
                         label="Sort By",
                         choices=["relevance", "citations", "year"],
                         value="relevance",
-                        elem_classes="gr-input"
+                        elem_classes="gr-dropdown"
                     )
                 
                 with gr.Column():
@@ -545,7 +592,7 @@ def create_interface():
                         label="Order",
                         choices=["descending", "ascending"],
                         value="descending",
-                        elem_classes="gr-input"
+                        elem_classes="gr-dropdown"
                     )
                 
                 with gr.Column():
@@ -621,7 +668,7 @@ def create_interface():
                         label="Format",
                         choices=["CSV", "Excel"],
                         value="CSV",
-                        elem_classes="gr-input"
+                        elem_classes="gr-dropdown"
                     )
             
             export_btn = gr.Button(