app.py

import streamlit as st

# Configure the page
st.set_page_config(
    page_title="My Streamlit App",
    page_icon="🚀",
    layout="wide"
)

# Sidebar for API Key input
with st.sidebar:
    st.header("⚙️ Configuration")
    api_key = st.text_input(
        "Enter API Key",
        type="password",
        placeholder="Enter your API key here",
        help="Your API key will be kept secure"
    )
    
    if api_key:
        st.success("✓ API Key entered")
    else:
        st.warning("⚠️ Please enter your API Key")
    
    st.divider()
    st.markdown("### About")
    st.info("This is a Streamlit application with API key authentication.")

# Main content area
st.title("🚀 Welcome to My Streamlit App")
st.markdown("---")

# Check if API key is provided
if api_key:
    st.success("🎉 You're authenticated! The app is ready to use.")
    
    # Add your main app content here
    st.header("Main Application")
    
    col1, col2 = st.columns(2)
    
    with col1:
        st.subheader("📊 Section 1")
        st.write("Add your content here")
        user_input = st.text_input("Enter some text:")
        if user_input:
            st.write(f"You entered: {user_input}")
    
    with col2:
        st.subheader("📈 Section 2")
        st.write("Add more content here")
        option = st.selectbox(
            "Choose an option:",
            ["Option 1", "Option 2", "Option 3"]
        )
        st.write(f"You selected: {option}")
    
    # Example button
    if st.button("Click Me!"):
        st.balloons()
        st.success("Button clicked!")
    
else:
    st.warning("⚠️ Please enter your API Key in the sidebar to continue.")
    st.info("👈 Use the sidebar on the left to enter your API key.")

# Footer
st.markdown("---")
st.markdown("Built with Streamlit 🎈")