fix: deployment

app.py

@@ -22,7 +22,7 @@ HF_TOKEN = (
 if HF_TOKEN is None:
     raise RuntimeError("Missing Hugging Face token. Set NTV3_HF_TOKEN as a Space Secret.")
 
-asyncio.set_event_loop_policy(asyncio.DefaultEventLoopPolicy())
+# asyncio.set_event_loop_policy(asyncio.DefaultEventLoopPolicy())
 
 PLOT_TARGET_POINTS = int(os.environ.get("PLOT_TARGET_POINTS", "1500"))
 SEARCH_MAX_RESULTS = int(os.environ.get("SEARCH_MAX_RESULTS", "50"))
@@ -325,18 +325,145 @@ CSS = """
 }
 
 #intro_markdown {
-  font-size: 1.3em !important;
-  line-height: 1.7 !important;
+  max-width: 1200px;
+  margin: 0 auto;
+  padding: 14px 8px 6px 8px;
 }
+
+/* overall hero container */
+#intro_markdown .intro-hero {
+  border: 1px solid rgba(0,0,0,0.08);
+  border-radius: 18px;
+  padding: 18px 18px 14px 18px;
+  background: linear-gradient(
+    180deg,
+    rgba(0, 128, 255, 0.06),
+    rgba(0, 0, 0, 0.00)
+  );
+}
+
+/* badge + title row */
+#intro_markdown .intro-title {
+  margin-bottom: 14px;
+}
+
+#intro_markdown .intro-badge {
+  display: inline-block;
+  font-weight: 700;
+  font-size: 0.95rem;
+  letter-spacing: 0.02em;
+  padding: 6px 10px;
+  border-radius: 999px;
+  background: rgba(0,0,0,0.06);
+  margin-bottom: 10px;
+}
+
 #intro_markdown h1 {
-  font-size: 2.8em !important;
-  margin-bottom: 0.6em !important;
+  font-size: 2.25rem !important;
+  line-height: 1.1 !important;
+  margin: 0 0 8px 0 !important;
+}
+
+#intro_markdown .intro-subtitle {
+  font-size: 1.05rem !important;
+  line-height: 1.6 !important;
+  margin: 0 !important;
+  opacity: 0.9;
+}
+
+/* grid of cards */
+#intro_markdown .intro-grid {
+  display: grid;
+  grid-template-columns: repeat(3, minmax(0, 1fr));
+  gap: 12px;
+  margin-top: 14px;
+}
+
+/* cards */
+#intro_markdown .intro-card {
+  border: 1px solid rgba(56, 189, 248, 0.18);           /* sky accent */
+  border-radius: 16px;
+  padding: 14px 14px 12px 14px;
+
+  /* dark glass */
+  background: linear-gradient(
+    180deg,
+    rgba(15, 23, 42, 0.72),
+    rgba(15, 23, 42, 0.55)
+  );
+
+  box-shadow:
+    0 10px 30px rgba(0, 0, 0, 0.35),
+    inset 0 1px 0 rgba(255, 255, 255, 0.06);
+
+  backdrop-filter: blur(10px);
+  -webkit-backdrop-filter: blur(10px);
+
+  transition: transform 120ms ease, border-color 120ms ease, box-shadow 120ms ease;
 }
-#intro_markdown h2, #intro_markdown h3 {
-  font-size: 1.8em !important;
+
+#intro_markdown .intro-card:hover {
+  transform: translateY(-2px);
+  border-color: rgba(56, 189, 248, 0.38);
+  box-shadow:
+    0 14px 36px rgba(0, 0, 0, 0.42),
+    inset 0 1px 0 rgba(255, 255, 255, 0.08);
 }
-#intro_markdown p, #intro_markdown li {
-  font-size: 1.2em !important;
+
+#intro_markdown .intro-card h3 {
+  font-size: 1.05rem !important;
+  margin: 0 0 8px 0 !important;
+  color: rgba(255, 255, 255, 0.95);
+  letter-spacing: 0.01em;
+}
+
+#intro_markdown .intro-card li {
+  font-size: 0.98rem !important;
+  line-height: 1.55 !important;
+  margin: 6px 0;
+  color: rgba(255, 255, 255, 0.82);
+}
+
+#intro_markdown .intro-card li::marker {
+  color: rgba(56, 189, 248, 0.75);
+}
+
+#intro_markdown .intro-card em,
+#intro_markdown .intro-card strong {
+  color: rgba(255, 255, 255, 0.92);
+}
+
+/* tip callout */
+#intro_markdown .intro-tip {
+  margin-top: 14px;
+  display: flex;
+  gap: 10px;
+  align-items: flex-start;
+  padding: 10px 12px;
+  border-radius: 14px;
+  background: rgba(0, 128, 255, 0.08);
+  border: 1px solid rgba(0, 128, 255, 0.18);
+}
+
+#intro_markdown .intro-tip-icon {
+  font-size: 1.2rem;
+  line-height: 1;
+  margin-top: 1px;
+}
+
+#intro_markdown .intro-tip span {
+  font-size: 0.98rem !important;
+  line-height: 1.55 !important;
+}
+
+/* responsive */
+@media (max-width: 960px) {
+  #intro_markdown .intro-grid {
+    grid-template-columns: 1fr;
+  }
+  #intro_markdown h1 {
+    font-size: 2.0rem !important;
+  }
 }
 """
 
@@ -415,18 +542,55 @@ _default_coords = DEFAULT_COORDS.get(DEFAULT_SPECIES, DEFAULT_COORDS["human"])
 
 with gr.Blocks(title="NTv3 Tracks Demo") as demo:
     gr.Markdown(
-        """
-# 🧬 NTv3 Tracks Demo
-
-**Predict functional genomics tracks and genome annotation elements from DNA sequences using NTv3 (Nucleotide Transformer v3).**
-
-This demo allows you to:
-- **Input**: Provide a DNA sequence directly or specify genomic coordinates (chromosome, start, end)
-- **Select tracks**: Choose from hundreds of BigWig functional tracks (e.g., RNA-seq, ChIP-seq, DNase) and genome annotation elements (e.g., exons, introns, promoters)
-- **Visualize**: View NTv3 predictions across the input sequence
+    """
+<div class="intro-hero">
+
+<div class="intro-title">
+  <h1>🧬 NTv3 Tracks Demo</h1>
+  <p class="intro-subtitle">
+    Predict and visualize functional genomics signals directly from DNA using
+    <strong>Nucleotide Transformer v3</strong>.
+  </p>
+</div>
+
+<div class="intro-grid">
+  <div class="intro-card">
+    <h3>1) Provide input</h3>
+    <ul>
+      <li>Select a <strong>model</strong> and <strong>species</strong></li>
+      <li>Use genomic coordinates (chrom, start, end), <em>or</em></li>
+      <li>Paste a DNA sequence</li>
+    </ul>
+  </div>
+
+  <div class="intro-card">
+    <h3>2) Choose signals</h3>
+    <ul>
+      <li>Search & select <strong>BigWig functional tracks</strong> (RNA-seq, ChIP-seq, DNase…)</li>
+      <li>Select <strong>BED genome annotation elements</strong> (exons, introns, promoters…)</li>
+    </ul>
+  </div>
+
+  <div class="intro-card">
+    <h3>3) Explore</h3>
+    <ul>
+      <li>View stacked tracks across the region</li>
+      <li>Compare multiple signals side-by-side</li>
+      <li>Download a high-resolution PNG from the plot</li>
+    </ul>
+  </div>
+</div>
+
+<div class="intro-tip">
+  <span class="intro-tip-icon">💡</span>
+  <span><strong>Tip:</strong> Start typing in the BigWig search box — results update as you type. Click any result to add it.</span>
+</div>
+
+</div>
 """,
-        elem_id="intro_markdown",
-    )
+    elem_id="intro_markdown",
+)
+
 
     gr.Markdown("## Select NTv3 post-trained model")