Create a Forest Serenity Logo

Devise a logo that embodies the serenity of a forest ecosystem. Picture a minimalist design with a stylized tree at its core, its branches gracefully arching outward. The background should feature silhouettes of distant mountains and a soft gradient of deep greens and earthy browns. Add whimsical birds in flight above the tree and subtle patterns of leaves surrounding it. The composition should convey calmness and a connection to nature, appealing to outdoor enthusiasts. The brand name is: Tranquil Forest.