app.py

import streamlit as st
import datetime

# Custom Styling
st.markdown("""
    <style>
        body {
            background-color: #f1f5f8;
            font-family: 'Arial', sans-serif;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            margin: 0;
        }

        .card {
            background-color: #ffffff;
            border-radius: 15px;
            padding: 40px;
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
            width: 400px;
            text-align: center;
        }

        .card h3 {
            font-size: 24px;
            color: #2575fc;
            margin-bottom: 20px;
        }

        .card p {
            font-size: 16px;
            color: #333;
        }

        .card button {
            background-color: #2575fc;
            color: white;
            border: none;
            padding: 15px 30px;
            border-radius: 8px;
            font-size: 18px;
            cursor: pointer;
            transition: background-color 0.3s;
        }

        .card button:hover {
            background-color: #6a11cb;
        }

        .stButton>button {
            font-size: 18px;
        }
        
        .stDateInput>div {
            margin-bottom: 20px;
        }
        
        .stTextInput>div {
            margin-bottom: 20px;
        }

    </style>
""", unsafe_allow_html=True)

def main():
    # Title and App Description
    st.title("Age Calculation App")
    st.markdown("<h2 style='color:#2575fc;'>Calculate Your Age</h2>", unsafe_allow_html=True)

    # Create input fields with icons
    dob = st.date_input("📅 Select Date of Birth", min_value=datetime.date(1900, 1, 1), max_value=datetime.date.today())
    current_date = st.date_input("📆 Select Current Date", max_value=datetime.date.today())

    # Simple Card UI
    with st.container():
        st.markdown("""
            <div class="card">
                <h3>Age Calculator</h3>
                <p>Enter your Date of Birth and the current date to calculate your age in years, months, and days.</p>
            </div>
        """, unsafe_allow_html=True)

    # Calculate and display age on button click
    if st.button("🔍 Calculate Age"):
        # Calculate years
        years = current_date.year - dob.year
        if (current_date.month, current_date.day) < (dob.month, dob.day):
            years -= 1

        # Calculate months
        if current_date.month >= dob.month:
            months = current_date.month - dob.month
        else:
            months = 12 + current_date.month - dob.month

        if current_date.day < dob.day:
            months -= 1

        # Calculate days
        if current_date.day >= dob.day:
            days = current_date.day - dob.day
        else:
            last_day_of_prev_month = (current_date.replace(day=1) - datetime.timedelta(days=1)).day
            days = last_day_of_prev_month - dob.day + current_date.day

        # Display age details
        st.write(f"Your date of birth is {dob.strftime('%Y-%m-%d')} and today's date is {current_date.strftime('%Y-%m-%d')}.")
        st.write(f"Your age is {years} years, {months} months, and {days} days.")

if __name__ == "__main__":
    main()