Create an ultra-high-definition professional gradient background with a dreamy, serene atmosphere. The background should transition smoothly from a light pastel blue at the top to a soft pale pink and orange near the horizon, mimicking the colors of a sky at dawn or dusk. Incorporate soft, fluffy clouds at the bottom of the frame, blending into the background with pink, purple, and light orange hues. Ensure the clouds are semi-transparent and create a sense of depth and tranquility. Apply soft lighting from above to cast gentle highlights on the clouds, with a warm, glowing effect. The overall style should be hyper-realistic with smooth gradients, evoking a sense of calmness and dream-like wonder. Maintain a balance between realism and imagination, focusing on natural softness and atmospheric blending."