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Reading the close-up: the knob is dominated by a big metallic chrome disc that occupies most of its surface. The dark part is just a thin outer rim. The indicator is a small dark notch on the disc that rotates with the value (the disc itself stays vertically lit). - Thin dark rim around the outside (~3px @ 56). - Large metallic disc fills the inside (radial gradient, brushed-metal striations from center outward, top crescent highlight). - Indicator is a small dark triangular notch on the disc, base near the center, tip toward the rim, rotated to the value angle. - Amber arc kept outside everything as a value-progress meter. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>