import streamlit as st

# Dummy login data (for demo purposes)
USER_CREDENTIALS = {
    "admin": "1234",
    "user": "abcd"
}

def login_app():
    st.title("🔐 Simple Login Page")

    # Input fields
    username = st.text_input("Username")
    password = st.text_input("Password", type="password")

    if st.button("Login"):
        if username in USER_CREDENTIALS and USER_CREDENTIALS[username] == password:
            st.success(f"✅ Welcome, {username}!")
        else:
            st.error("❌ Invalid username or password")

if __name__ == "__main__":
    login_app()