whimsical ocean themed digital artwork with seashells, clouds, stars, and waves in pastel colors, perfect for nautical decor and

creative design nautical ocean themed decor seashell art marine aquatic theme underwater world maritime motifs seashore elements serene beach coastal inspiration pastel hues artistic sea shells vibes whimsical beachy digital scene stars relaxing seashells artwork tranquil summer vibe colors soothing aesthetic unique composition seaside clouds playful waves oceanic decoration relaxed atmosphere soft