Create a minimalist and elegant design featuring a delicate tree silhouette against a bright white background. The tree should be illustrated in a simple, hand-drawn style, emphasizing the intricate details of its branches and leaves, with varying line weights to convey depth and texture. The tree will be centered on the chest of the t-shirt, with its branches stretching organically outward in a graceful, flowing manner. Behind the tree, incorporate a subtle gradient transitioning from soft sky blue at the top to gentle lavender at the bottom, evoking the serene atmosphere of dawn or dusk. This design should exude a sense of peace and tranquility, perfect for casual wear on a relaxing day outdoors. The overall aesthetic should appeal to nature lovers and fans of minimalist fashion, creating a calming visual statement.