9b0c7c0cac
A fourth aesthetic direction beyond the three knob variants — based on the user's reference image (Moog/Roland/Korg vintage rack gear). - Warm amber+charcoal palette (replaces the cyan phosphor accent). - Beveled metal panels with corner screws (radial-gradient circles with a slot mark). - Knobs: brushed-metal radial gradient, knurled perimeter ridges, specular highlight, white-warm engraved indicator, amber arc with glow. - LEDs for step cells: dim amber-off when inactive, full amber-on with radial glow when active. Animated playhead outline at 8 Hz. - Code "screen" with engraved-screen feel (inset shadow, faint amber bloom). Status line "> RUNNING_" with blinking cursor. - Engraved labels (small caps, double text-shadow for inset). - Tabular numeric value displays in their own dark inset readouts (LCD-style). - Header buttons (STOP / RUN) with green run LED, pulsing red status. Static mockup — no audio engine wired. Knobs are draggable to evaluate the feel; step LEDs toggle on click. Decision pending: pick this or one of A/B/C from knobs.html and align all surfaces to that language.