Envision a tranquil Arctic scene at twilight, where a family of polar bears roams across the pristine ice. The sky is painted with the soft hues of the Northern Lights, casting a magical glow over the snow. In the foreground, a mother bear gently nudges her playful cubs, their fur blending perfectly with the icy landscape. In the distance, the icebergs float silently, reflecting the aurora's colors. Capture this serene moment in a soft pastel art style, emphasizing the harmony and beauty of wildlife in the Arctic wilderness.