Polish CrossTalk AI UI: standardized spacing, contrast, and table styling

app.py

@@ -261,182 +261,331 @@ def safe_search(query):
 
 
 custom_css = """
+:root {
+    --bg: #0A0E17;
+    --panel: #10151F;
+    --panel-border: #1E2635;
+    --panel-border-strong: #2A3549;
+    --text-primary: #F8FAFC;
+    --text-secondary: #94A3B8;
+    --text-tertiary: #64748B;
+    --accent-blue: #3B82F6;
+    --accent-blue-hover: #2563EB;
+    --accent-green: #22C55E;
+    --input-bg: #0B1120;
+    --radius-lg: 16px;
+    --radius-md: 12px;
+    --radius-sm: 8px;
+    --space-1: 8px;
+    --space-2: 12px;
+    --space-3: 16px;
+    --space-4: 24px;
+    --space-5: 32px;
+}
+
+* {
+    box-sizing: border-box;
+}
+
 .gradio-container {
-    background: #0B0F19 !important;
-    color: #F8FAFC !important;
-    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif !important;
+    background: var(--bg) !important;
+    color: var(--text-primary) !important;
+    font-family: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif !important;
 }
 
 #shell {
-    max-width: 1180px;
+    max-width: 880px;
     margin: 0 auto;
-    padding: 26px 18px 36px 18px;
+    padding: var(--space-5) var(--space-3) 48px var(--space-3);
 }
 
+/* ---------- HERO ---------- */
+
 .hero {
-    background: #111827;
-    border: 1px solid #243044;
-    border-radius: 18px;
-    padding: 26px 30px;
-    margin-bottom: 22px;
-    box-shadow: 0 18px 45px rgba(0,0,0,0.24);
+    background: linear-gradient(180deg, #131A29 0%, #10151F 100%);
+    border: 1px solid var(--panel-border);
+    border-radius: var(--radius-lg);
+    padding: 32px 34px;
+    margin-bottom: var(--space-4);
+    box-shadow: 0 20px 50px rgba(0,0,0,0.30);
 }
 
 .badge {
-    display: inline-block;
-    padding: 6px 11px;
+    display: inline-flex;
+    align-items: center;
+    gap: 6px;
+    padding: 6px 12px;
     border-radius: 999px;
-    background: #172033;
-    border: 1px solid #2B3A55;
-    color: #CBD5E1;
-    font-weight: 700;
+    background: rgba(59,130,246,0.10);
+    border: 1px solid rgba(59,130,246,0.35);
+    color: #93C5FD;
+    font-weight: 650;
     font-size: 12px;
-    margin-bottom: 14px;
+    letter-spacing: 0.02em;
+    text-transform: uppercase;
+    margin-bottom: var(--space-3);
 }
 
 .title {
-    font-size: 34px;
-    line-height: 1.12;
-    font-weight: 850;
-    letter-spacing: -0.035em;
-    margin: 0 0 10px 0;
+    font-size: 36px;
+    line-height: 1.15;
+    font-weight: 800;
+    letter-spacing: -0.03em;
+    margin: 0 0 12px 0;
     color: #FFFFFF;
 }
 
 .subtitle {
-    color: #CBD5E1;
+    color: var(--text-secondary);
     font-size: 15px;
     line-height: 1.65;
-    max-width: 980px;
+    max-width: 640px;
+    margin: 0 0 var(--space-4) 0;
 }
 
 .info-strip {
     display: flex;
     flex-wrap: wrap;
-    gap: 10px;
-    margin-top: 18px;
+    gap: 8px;
 }
 
 .info-pill {
-    padding: 9px 12px;
-    border-radius: 10px;
-    background: #0F172A;
-    border: 1px solid #26344D;
-    color: #E2E8F0;
-    font-size: 13px;
-    font-weight: 650;
+    padding: 8px 13px;
+    border-radius: var(--radius-sm);
+    background: var(--input-bg);
+    border: 1px solid var(--panel-border);
+    color: #CBD5E1;
+    font-size: 12.5px;
+    font-weight: 600;
 }
 
+/* ---------- CARDS ---------- */
+
 .main-card {
-    background: #111827 !important;
-    border: 1px solid #243044 !important;
-    border-radius: 18px !important;
-    padding: 22px !important;
-    box-shadow: 0 16px 38px rgba(0,0,0,0.22);
-    margin-bottom: 18px !important;
+    background: var(--panel) !important;
+    border: 1px solid var(--panel-border) !important;
+    border-radius: var(--radius-lg) !important;
+    padding: 28px !important;
+    box-shadow: 0 16px 40px rgba(0,0,0,0.24);
+    margin-bottom: var(--space-3) !important;
+    position: relative;
+    overflow: hidden;
 }
 
-.search-card {
-    border-top: 4px solid #3B82F6 !important;
+.main-card::before {
+    content: "";
+    position: absolute;
+    top: 0;
+    left: 0;
+    right: 0;
+    height: 3px;
 }
 
-.output-card {
-    border-top: 4px solid #22C55E !important;
+.search-card::before {
+    background: var(--accent-blue);
+}
+
+.output-card::before {
+    background: var(--accent-green);
+}
+
+.section-header {
+    display: flex;
+    align-items: baseline;
+    justify-content: space-between;
+    margin-bottom: 4px;
 }
 
 .section-title {
-    color: #F8FAFC;
-    font-size: 22px;
-    font-weight: 800;
-    margin-bottom: 6px;
+    color: var(--text-primary);
+    font-size: 19px;
+    font-weight: 750;
+    letter-spacing: -0.01em;
 }
 
 .section-subtitle {
-    color: #94A3B8;
-    font-size: 14px;
-    line-height: 1.55;
-    margin-bottom: 18px;
+    color: var(--text-secondary);
+    font-size: 13.5px;
+    line-height: 1.6;
+    margin-bottom: var(--space-3);
+}
+
+/* ---------- FORM CONTROLS ---------- */
+
+label span {
+    color: var(--text-secondary) !important;
+    font-size: 12.5px !important;
+    font-weight: 650 !important;
+    text-transform: uppercase;
+    letter-spacing: 0.03em;
 }
 
-textarea, input {
-    background: #0B1220 !important;
+textarea, input[type="text"] {
+    background: var(--input-bg) !important;
     color: #FFFFFF !important;
-    border: 1px solid #334155 !important;
-    border-radius: 12px !important;
+    border: 1px solid var(--panel-border-strong) !important;
+    border-radius: var(--radius-md) !important;
     font-size: 15px !important;
+    padding: 12px 14px !important;
+    transition: border-color 0.15s ease, box-shadow 0.15s ease;
 }
 
-textarea:focus, input:focus {
-    border-color: #60A5FA !important;
-    box-shadow: 0 0 0 3px rgba(59,130,246,0.18) !important;
+textarea:focus, input[type="text"]:focus {
+    border-color: var(--accent-blue) !important;
+    box-shadow: 0 0 0 3px rgba(59,130,246,0.16) !important;
+    outline: none !important;
+}
+
+textarea::placeholder, input::placeholder {
+    color: var(--text-tertiary) !important;
+}
+
+.input-wide {
+    margin: var(--space-1) 0 var(--space-3) 0;
+}
+
+/* ---------- BUTTONS ---------- */
+
+.button-row {
+    display: flex;
+    gap: 10px;
+    margin-bottom: var(--space-1);
 }
 
 button.search-button {
-    background: #2563EB !important;
-    border: 1px solid #2563EB !important;
-    border-radius: 12px !important;
+    background: var(--accent-blue) !important;
+    border: 1px solid var(--accent-blue) !important;
+    border-radius: var(--radius-md) !important;
     color: #FFFFFF !important;
-    font-weight: 800 !important;
-    min-height: 48px !important;
+    font-weight: 700 !important;
+    font-size: 14.5px !important;
+    min-height: 46px !important;
+    flex: 2;
+    transition: background 0.15s ease, transform 0.05s ease;
 }
 
 button.search-button:hover {
-    background: #1D4ED8 !important;
+    background: var(--accent-blue-hover) !important;
+}
+
+button.search-button:active {
+    transform: translateY(1px);
 }
 
 button.clear-button {
-    background: #1F2937 !important;
-    border: 1px solid #374151 !important;
-    border-radius: 12px !important;
-    color: #E5E7EB !important;
-    font-weight: 750 !important;
-    min-height: 48px !important;
+    background: transparent !important;
+    border: 1px solid var(--panel-border-strong) !important;
+    border-radius: var(--radius-md) !important;
+    color: var(--text-secondary) !important;
+    font-weight: 650 !important;
+    font-size: 14.5px !important;
+    min-height: 46px !important;
+    flex: 1;
+    transition: border-color 0.15s ease, color 0.15s ease;
 }
 
-.status-panel textarea {
-    background: #07111F !important;
-    border: 1px solid #334155 !important;
+button.clear-button:hover {
+    border-color: var(--text-secondary) !important;
+    color: #FFFFFF !important;
+}
+
+/* ---------- EXAMPLES ---------- */
+
+#examples-block {
+    margin-top: var(--space-3);
+    padding-top: var(--space-3);
+    border-top: 1px solid var(--panel-border);
+}
+
+#examples-block .label-wrap span {
+    color: var(--text-tertiary) !important;
+    font-size: 12px !important;
+    text-transform: uppercase;
+    letter-spacing: 0.03em;
+}
+
+#examples-block button {
+    background: var(--input-bg) !important;
+    border: 1px solid var(--panel-border) !important;
+    border-radius: 999px !important;
+    color: #CBD5E1 !important;
+    font-size: 13px !important;
+    font-weight: 550 !important;
+    padding: 6px 14px !important;
+}
+
+#examples-block button:hover {
+    border-color: var(--accent-blue) !important;
     color: #FFFFFF !important;
-    font-weight: 750 !important;
+}
+
+/* ---------- STATUS + OUTPUT ---------- */
+
+.status-panel textarea {
+    background: #070C16 !important;
+    border: 1px solid var(--panel-border) !important;
+    color: #E2E8F0 !important;
+    font-weight: 650 !important;
+    font-size: 13.5px !important;
+    min-height: 40px !important;
+    padding: 10px 14px !important;
 }
 
 .result-note {
-    background: #0F172A;
-    border: 1px solid #243044;
-    border-radius: 12px;
-    padding: 12px 14px;
-    color: #CBD5E1;
-    font-size: 13px;
-    line-height: 1.55;
+    background: var(--input-bg);
+    border: 1px solid var(--panel-border);
+    border-radius: var(--radius-md);
+    padding: 14px 16px;
+    color: var(--text-secondary);
+    font-size: 13.5px;
+    line-height: 1.6;
 }
 
 .dataframe {
-    border-radius: 12px !important;
+    border-radius: var(--radius-md) !important;
     overflow: hidden !important;
-    border: 1px solid #243044 !important;
+    border: 1px solid var(--panel-border) !important;
+    font-size: 13.5px !important;
 }
 
-.footer {
-    text-align: center;
-    color: #94A3B8;
-    font-size: 13px;
-    line-height: 1.6;
-    margin-top: 18px;
+.dataframe th {
+    background: #0D1420 !important;
+    color: var(--text-secondary) !important;
+    font-size: 11.5px !important;
+    text-transform: uppercase;
+    letter-spacing: 0.03em;
+    font-weight: 700 !important;
 }
 
-#examples-block {
-    margin-top: 14px;
+.dataframe td {
+    color: #E2E8F0 !important;
 }
 
-.input-wide {
-    margin-top: 8px;
-    margin-bottom: 14px;
+/* ---------- FOOTER ---------- */
+
+.footer {
+    text-align: center;
+    color: var(--text-tertiary);
+    font-size: 12.5px;
+    line-height: 1.7;
+    margin-top: var(--space-4);
+    padding-top: var(--space-3);
+    border-top: 1px solid var(--panel-border);
 }
 
-@media (max-width: 900px) {
+@media (max-width: 640px) {
     .title {
         font-size: 28px;
     }
+    .main-card {
+        padding: 20px !important;
+    }
+    .hero {
+        padding: 24px 22px;
+    }
+    .button-row {
+        flex-direction: column;
+    }
 }
 """
 
@@ -463,19 +612,21 @@ with gr.Blocks(
         primary_hue="blue",
         secondary_hue="slate",
         neutral_hue="slate"
-    )
+    ),
+    title="CrossTalk AI"
 ) as demo:
 
     with gr.Column(elem_id="shell"):
         gr.HTML(
             """
             <div class="hero">
-                <div class="badge">Full trained hybrid retrieval system</div>
+                <div class="badge">Hybrid retrieval system</div>
                 <h1 class="title">CrossTalk AI</h1>
-                <div class="subtitle">
-                    A retrieval-based language identification and translation support system for low-resource ethnic languages of Bangladesh.
-                    It combines verified dictionary lookup with fine-tuned E5 semantic retrieval and FAISS vector search.
-                </div>
+                <p class="subtitle">
+                    A retrieval-based language identification and translation support system for
+                    low-resource ethnic languages of Bangladesh — combining verified dictionary lookup
+                    with fine-tuned E5 semantic retrieval and FAISS vector search.
+                </p>
                 <div class="info-strip">
                     <div class="info-pill">12 language groups</div>
                     <div class="info-pill">70K+ indexed entries</div>
@@ -487,27 +638,30 @@ with gr.Blocks(
             """
         )
 
-        # SEARCH SECTION - FULL WIDTH
+        # SEARCH SECTION
         with gr.Column(elem_classes=["main-card", "search-card"]):
             gr.HTML(
                 """
-                <div class="section-title">Search input</div>
+                <div class="section-header">
+                    <div class="section-title">Search</div>
+                </div>
                 <div class="section-subtitle">
-                    Enter an ethnic source word. Exact and base-form matches are treated as verified dictionary outputs.
+                    Enter a source word. Exact and base-form matches are treated as verified
+                    dictionary outputs; everything else is a semantic suggestion.
                 </div>
                 """
             )
 
             query = gr.Textbox(
                 label="Source word",
-                placeholder="Example: kəkhyáŋ, Hula, Aina, aam, bajaoo",
+                placeholder="e.g. kəkhyáŋ, Hula, Aina, aam, bajaoo",
                 lines=1,
                 elem_classes=["input-wide"]
             )
 
-            with gr.Row():
-                clear_btn = gr.Button("Clear", elem_classes=["clear-button"])
+            with gr.Row(elem_classes=["button-row"]):
                 submit_btn = gr.Button("Search", elem_classes=["search-button"])
+                clear_btn = gr.Button("Clear", elem_classes=["clear-button"])
 
             gr.Examples(
                 examples=[
@@ -519,23 +673,26 @@ with gr.Blocks(
                     ["unknown tribal word"]
                 ],
                 inputs=query,
-                label="Examples",
+                label="Try an example",
                 elem_id="examples-block"
             )
 
-        # OUTPUT SECTION - BELOW SEARCH
+        # OUTPUT SECTION
         with gr.Column(elem_classes=["main-card", "output-card"]):
             gr.HTML(
                 """
-                <div class="section-title">Retrieval output</div>
+                <div class="section-header">
+                    <div class="section-title">Results</div>
+                </div>
                 <div class="section-subtitle">
-                    The system returns verified dictionary matches first. Semantic fallback appears only when no verified match is found.
+                    Verified dictionary matches appear first. Semantic fallback results are shown
+                    only when no verified match exists.
                 </div>
                 """
             )
 
             status = gr.Textbox(
-                label="System status",
+                label="Status",
                 lines=1,
                 elem_classes=["status-panel"],
                 value="Ready."
@@ -544,7 +701,7 @@ with gr.Blocks(
             summary = gr.Markdown(
                 value="""
                 <div class="result-note">
-                Enter a source word and click Search. Results will appear below.
+                Enter a source word above and click Search — results will appear here.
                 </div>
                 """
             )
@@ -560,7 +717,8 @@ with gr.Blocks(
         gr.HTML(
             """
             <div class="footer">
-                Exact/base-form matches are verified dictionary outputs. Fine-tuned semantic fallback results are candidate suggestions only, not confirmed translations.
+                Exact / base-form matches are verified dictionary outputs.
+                Fine-tuned semantic fallback results are candidate suggestions only, not confirmed translations.
             </div>
             """
         )
@@ -581,7 +739,7 @@ with gr.Blocks(
         fn=lambda: (
             "",
             "Ready.",
-            '<div class="result-note">Enter a source word and click Search. Results will appear below.</div>',
+            '<div class="result-note">Enter a source word above and click Search — results will appear here.</div>',
             EMPTY_RESULTS
         ),
         inputs=None,