Update app.py

app.py

@@ -288,20 +288,20 @@ class ChemicalIdentifier:
                   with gr.Column(scale=0.10, min_width=160):
                       upload_button = gr.UploadButton(
                           "Browse File", file_types=[".txt", ".pdf", ".doc", ".docx"],
-                          elem_classes="heightfit",
+                          elem_classes="heightfit",variant="primary",
                           file_count = "multiple")
               with gr.Row():
                 with gr.Column(scale=1, min_width=0):
                   excel_input = gr.File(elem_classes="heightfit1",label = "excel file",file_types = [".xlsx"])
               with gr.Row():
                 with gr.Column(scale=1, min_width=0):
-                  analyse_btn = gr.Button(value="Analyse")
+                  analyse_btn = gr.Button(value="Analyse",variant="primary")
               with gr.Row():
                 with gr.Column(scale=1, min_width=0):
                   answer = gr.Textbox(value="",label='Chemicals :',show_label=True, placeholder="",lines=5)
               with gr.Row():
                 with gr.Column(scale=1, min_width=0):
-                  compare_btn = gr.Button(value="valid")
+                  compare_btn = gr.Button(value="valid",variant="primary")
               with gr.Row():
                 with gr.Column(scale=1, min_width=0):
                   compared_result = gr.Textbox(value="",label='valid chemicals :',show_label=True, placeholder="",lines=5)