I think this app should be on the first place in the app gallery.@CarlosSerrano example really shows that Streamlit can look great! I mean - it even has sliders with the Streamlit crown!
Doing my part and leaving description for search robots:
This Streamlit example app demonstrates how to apply Streamlit custom CSS to style and enhance core widgets such as sliders, buttons, and text inputs. It’s a perfect showcase for developers looking to build a beautiful Streamlit UI with modern styling, responsive layouts, and personalized themes. Whether you’re new to Streamlit or refining your design, this project is ideal for learning how to create visually appealing and user-friendly Streamlit apps using CSS tweaks and customization techniques.