Clean flat slide design style guide for NotebookLM

Brand color: [brand_color] A simple and clean flat design. Place people and icons drawn with uniform black outline lines, and partially use pastel accent colors (such as sky blue and coral pink). Emphasize rounded shapes and a soft overall impression. Use a diagram-centered layout (for example: Venn diagrams, bar graphs, speech bubbles), with a friendly tone suitable for materials and social media content aimed at students and younger audiences. Leave plenty of white space to prioritize legibility and balanced composition.