import streamlit as st

def initialize_session_state():
    """Initialize session state variables."""
    if 'history' not in st.session_state:
        st.session_state.history = []

def load_css():
    """Load custom CSS styles."""
    st.markdown("""
        <style>
            .stButton>button {
                width: 100%;
                background-color: #FF4B4B;
                color: white;
            }
            
            .stTextInput>div>div>input {
                border-radius: 5px;
            }
            
            .stMarkdown {
                font-family: 'Arial', sans-serif;
            }
            
            h1, h2, h3 {
                color: #262730;
            }
            
            .sidebar .sidebar-content {
                background-color: #F0F2F6;
            }
            
            .stExpander {
                background-color: white;
                border-radius: 5px;
                margin-bottom: 10px;
            }
            
            .stRadio > div {
                display: flex;
                gap: 1rem;
            }
            
            .stSelectbox {
                margin-bottom: 1rem;
            }
        </style>
    """, unsafe_allow_html=True)