Update app.py

app.py

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+import streamlit as st
+
+# Custom CSS for styling
+st.markdown(
+    """
+    <style>
+    body {
+        background: linear-gradient(to right, #1e3c72, #2a5298);
+        font-family: 'Segoe UI', sans-serif;
+        color: white;
+    }
+    .stButton > button {
+        background-color: #1f78b4;
+        color: white;
+        border-radius: 8px;
+        font-size: 16px;
+        padding: 10px 20px;
+        border: none;
+        transition: 0.3s;
+    }
+    .stButton > button:hover {
+        background-color: #14527a;
+    }
+    </style>
+    """,
+    unsafe_allow_html=True,
+)
+
+# App title and introduction
+st.title("🌡️ Temperature Converter")
+st.markdown(
+    """
+    Welcome to the **Temperature Converter** app!  
+    Convert temperatures seamlessly between Celsius, Fahrenheit, and Kelvin.
+    """
+)
+
+# Conversion function
+def convert_temperature(value, from_unit, to_unit):
+    if from_unit == "Celsius":
+        if to_unit == "Fahrenheit":
+            return value * 9/5 + 32
+        elif to_unit == "Kelvin":
+            return value + 273.15
+    elif from_unit == "Fahrenheit":
+        if to_unit == "Celsius":
+            return (value - 32) * 5/9
+        elif to_unit == "Kelvin":
+            return (value - 32) * 5/9 + 273.15
+    elif from_unit == "Kelvin":
+        if to_unit == "Celsius":
+            return value - 273.15
+        elif to_unit == "Fahrenheit":
+            return (value - 273.15) * 9/5 + 32
+    return value
+
+# Input fields
+st.markdown("### Enter the temperature to convert:")
+temperature = st.number_input("Temperature:", min_value=-273.15, value=0.0, step=0.1)
+
+from_unit = st.selectbox("Convert from:", ["Celsius", "Fahrenheit", "Kelvin"])
+to_unit = st.selectbox("Convert to:", ["Celsius", "Fahrenheit", "Kelvin"])
+
+# Convert and display the result
+if st.button("Convert"):
+    if from_unit == to_unit:
+        st.warning("Please select different units for conversion.")
+    else:
+        result = convert_temperature(temperature, from_unit, to_unit)
+        st.success(f"{temperature}° {from_unit} is equal to {result:.2f}° {to_unit}.")