app.py

import streamlit as st

def calculate_tip(total_amount, people, tip_percent):
    tip = total_amount * (tip_percent / 100)
    grand_total = total_amount + tip
    per_person = grand_total / people
    return tip, grand_total, per_person

def main():
    st.set_page_config(page_title="Bill Splitter", page_icon="💸")
    st.title("💸 Bill Splitter + Tip Calculator")
    st.markdown("Split your bill with friends & add a fair tip.")

    total_amount = st.number_input("Total Bill Amount (PKR)", min_value=0.0, step=50.0, format="%.2f")
    people = st.number_input("Number of People", min_value=1, step=1)
    tip_percent = st.slider("Tip Percentage", min_value=0, max_value=50, value=10)

    if st.button("Calculate"):
        tip, grand_total, per_person = calculate_tip(total_amount, people, tip_percent)
        
        st.success(f"💰 Tip: PKR {tip:.2f}")
        st.info(f"🧾 Grand Total: PKR {grand_total:.2f}")
        st.success(f"👥 Each Person Pays: PKR {per_person:.2f}")
        
        if tip_percent < 5:
            st.caption("🧊 Cold-hearted tipping 😅")
        elif tip_percent <= 15:
            st.caption("🫡 Standard tipper — you're good.")
        else:
            st.caption("💎 Generous boss vibes!")

if __name__ == "__main__":
    main()