Create a UI theme in a neo-brutalist style: blocky geometry, oversized controls, thick 4-12px outlines, and big bold offsets (hard shadow plates offset 6-12px bottom-right; active press reduces offset by 2-4px). Use grid/blueprint cues—graph lines, micro-dots, hatch/stipple textures—on flat matte surfaces; reserve subtle gloss only for CTAs. Background (only skeuomorphic element): grey-blue graph paper via CSS—base #f1f5f9, grid from repeating-linear-gradients in #cbd5e1/#94a3b8 at 16-24px; add a fullscreen grain layer (SVG turbulence or 1px noise PNG) at 3-6% opacity with filter: blur(0.4-0.8px) contrast(102%) brightness(101%); lock to viewport. Corner rule: components are either square (0px radius) or very rounded (50% of component height)—no in-between. Mobile-first layout: single-column flow on phones, 4/8/16/24 spacing scale, tap targets >= 48x48, sticky header + bottom nav; expand to 2-4 columns at sm >= 640 / md >= 768 / lg >= 1024 with asymmetric stacks. Maintain high contrast on light backgrounds. Secret name "Neobrute Blueprint." Use these colors: #f1f5f9 #cbd5e1 #94a3b8 #64748b #0f172a #242424 #ffffff. Never use white text on light backgrounds; #ffffff is for surfaces, not text (white text is fine on dark fills like #0f172a or #242424).