Flat modern cartoon illustration style, bold vector shapes with clean…

Flat modern cartoon illustration style, bold vector shapes with clean thick outlines, playful and warm, vibrant saturated color palette: deep teal-blue (#0E6E8C), navy blue (#182B57), white, and one warm sunny-yellow accent (#FFC94A). Simple friendly characters with minimal dot eyes, soft rounded shapes, subtle flat drop shadows, no photorealism, vertical portrait Instagram card, 1024x1536. A teenager sitting cross-legged near a window looking thoughtful but calm, soft warm lamp light, cozy room, cheerful but introspective mood. Deep navy background with subtle abstract cloud shapes in the corners. Render this exact Russian text, spelled correctly, in a bold rounded modern sans-serif font (style similar to Poppins/Montserrat Bold): Large centered white headline text (top-center area, large size, 3 lines): "Как помочь подростку понять себя, найти друзей и перестать закрываться в комнате?" Below it, a small rounded yellow pill/button shape with bold navy uppercase text inside: "СТАРТ ГРУППЫ — 20 СЕНТЯБРЯ"