Create a vibrant marketing poster background featuring an abstract blend of geometric shapes and dynamic lines in bright colors like teal, coral, and yellow. Incorporate subtle textures that resemble watercolor or spray paint, giving the design an energetic and youthful vibe. Ensure there is ample negative space in the center for text placement, and include a faded gradient transitioning from dark to light at the edges to draw the viewer's eye inward.

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Create a vibrant marketing poster background featuring an abstract blend of geometric shapes and dynamic lines in bright colors like teal, coral, and yellow. Incorporate subtle textures that resemble watercolor or spray paint, giving the design an energetic and youthful vibe. Ensure there is ample negative space in the center for text placement, and include a faded gradient transitioning from dark to light at the edges to draw the viewer's eye inward.