app file update

src/app.py

@@ -23,9 +23,12 @@ with st.container():
         <h1 class="header1">Easily process <br> your spectral data<br> with <span class="green">NIRS Utils</span></h1>
         """, unsafe_allow_html=True)
 
-st.markdown('&nbsp;\n&nbsp;\n&nbsp;\n&nbsp;\n&nbsp;\n')
-
 # add graphical abstract
+st.markdown(
+    """
+    <div style="height: 50px;"></div>
+    """,
+      unsafe_allow_html=True)
 c1, c2 = st.columns([2, 2])
 with c2:
     image = Image.open("images/general.JPG")
@@ -34,6 +37,12 @@ with c2:
 
 
 # subpage info
+st.markdown(
+    """
+    <div style="height: 50px;"></div>
+    """,
+      unsafe_allow_html=True)
+
 c3, c4, c5 = st.columns([2, 1.5, 2])
 with c3:    
     st.markdown('<h2 class="centered-text">About</h2>', unsafe_allow_html=True)
@@ -43,13 +52,11 @@ with c5:
     st.markdown('<h2 class="centered-text">Key Features</h2>', unsafe_allow_html=True)
     st.markdown('<h3 class="centered-text"> Our app featured a variety of analytical capabilities that makes it the optimal solution for spectral data processing : <br> - Easy-to-use. <br> - Use advanced frameworks. <br> - Enhanced automation capabilities. <br> - Saves your time and efforts.</h3>', unsafe_allow_html=True)
 
-# st.markdown('&nbsp;\n&nbsp;\n&nbsp;\n&nbsp;\n&nbsp;\n')
-    
 
 # add buttons at the bottom of the page
 header1, header2, header3,header4 = st.columns(4)
 if header1.button("Inputs"):
-    st.switch_page(pages_folder / '4-inputs.py')
+    st.switch_page(pages_folder / '0-inputs.py')
 if header2.button("Samples Selection"):
     st.switch_page(pages_folder / '1-samples_selection.py')
 if header3.button("Models Creation"):