Create a sleek minimalist t-shirt design featuring a single bold line that elegantly forms the waves of the Bay of Bengal. The wave design should be smooth and fluid, conveying a sense of movement and tranquility. At the top of the design, include a small yellow sun that is proportionate and complements the wave graphic. Below the waves, place the text “coastal vibes” in a clean, lowercase font that aligns with the minimalist aesthetic. Utilize a crisp white background with navy blue for the wave line and sunshine yellow for the sun, creating a fresh and modern look ideal for casual wear. The overall atmosphere should be fresh and modern, appealing to those who appreciate minimalist design. Ensure the flat design style is clean and sharp, with vibrant colors that stand out against the transparent background, making it perfect for a stylish, casual look.