Design a unique, standing faceless avatar for a psychology-themed YouTube channel. The avatar should wear a dark, form-fitting hoodie sweater featuring intricate neural network patterns and a sleek, seamless mask with glowing abstract lines hinting at thought processes. Use dark tones like black, deep blue, or dark gray with subtle contrasting accents. The overall look should convey mystery, intelligence, and introspection. The background should be a clean, flat solid color, such as deep charcoal gray or midnight blue, with no flashy elements but a slight gradient or texture for depth.