Create a detailed sketch of a hotel building set in a picturesque hilly terrain surrounded by dense trees. The structure should be a Ground +4 design. The ground floor features a full-sized clear glass facade, allowing a seamless connection with the natural surroundings. The three floors above have balconies and terraces, providing expansive views of the hilly landscape. The architectural style is contemporary Art Nouveau, characterized by its flowing lines, organic forms, and intricate details. Ensure the hotel blends harmoniously with the lush greenery and undulating hills.