Create a premium, high-resolution vector illustration poster (1080x1350 px, portrait) for a dealer reward campaign by Oswaal Books, themed around a luxury Goa summer getaway. The design should be modern, minimal yet visually rich, using a refined flat illustration style with soft gradients (avoid cartoonish or childish aesthetics; aim for a balance between Airbnb-style travel illustrations and premium brand visuals). Scene composition: A stylized tropical Goa beach environment. Include a calm ocean with smooth flowing wave shapes in teal and aqua gradients, a clean sandy foreground in warm cream tones, and 2–3 elegant palm trees slightly leaning to create a breezy coastal feel. Add a soft glowing sunset or sun disk near the horizon using warm orange, peach, and coral gradients blending into a pastel sky. Include subtle flying birds for depth. In the mid-ground, place a minimal illustrated couple (male and female), faceless or with very low-detail features, walking together along the shoreline or sitting close, symbolizing companionship and aspiration. Keep them modest, fully decent, and tastefully styled. Optionally include a minimal beach shack silhouette or cabana in the background for location context. Color palette: Teal blue, aqua, sunset orange, coral, peach, soft yellow, and beige sand tones. Use smooth gradients and soft shadows to add depth while maintaining a clean, uncluttered aesthetic. Typography integration: Text should feel embedded within the illustration.