Animated WebGL shader background in the Grain Gradient style. Truchet variant. Generated by the 21st.dev Shader Builder. Adapted from Paper Shaders under Apache-2.0. 4-color palette (#DB4B8F, #3F3CBB, #0A0A0A, #FFD66B). Features: high intensity. A drop-in, zero-dependency React component for hero sections and animated gradient/noise backgrounds.