Design a vibrant t-shirt graphic titled "London Pride." The design features a stylized illustration of the London skyline, incorporating iconic landmarks such as Big Ben, the London Eye, and Tower Bridge, rendered in bold lines and geometric shapes. The skyline should be set against a bold gradient background that transitions through the colors of the rainbow, creating a festive and inclusive atmosphere. The text "London Pride" should be displayed in a bold, sans-serif font, centered across the chest, with a subtle glitter effect to enhance its celebratory feel. Utilize digital illustration techniques to ensure the rainbow colors are bright and harmonious, with smooth transitions. In post-production, apply subtle drop shadows and highlights to both the skyline and the text to enhance depth and dimension. The final design should maintain a transparent background, making it a perfect choice for those who celebrate diversity and inclusivity in London.