Design a sleek and modern logo for a fitness app, featuring a stylized silhouette of an abstract runner in motion. Incorporate dynamic lines to convey speed and energy, using a vibrant color palette of teal and orange. The background should be minimalistic to ensure the runner stands out, and add subtle geometric shapes to symbolize progress and strength, creating a sense of movement and motivation in the design.

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Design a sleek and modern logo for a fitness app, featuring a stylized silhouette of an abstract runner in motion. Incorporate dynamic lines to convey speed and energy, using a vibrant color palette of teal and orange. The background should be minimalistic to ensure the runner stands out, and add subtle geometric shapes to symbolize progress and strength, creating a sense of movement and motivation in the design.