I built a master identity for a sample health brand: a symbol made of one open ring and one dot, a monoline wordmark with optical kerning, horizontal and stacked lockups, three ten-step color scales with all 18 text pairings passing AA, a 1.25 type scale, a visual direction and concise guidelines. A proof page renders the symbol at 512, 128, 64, 32, 24 and 16 px and measures every stroke and gap against a stated minimum; at 16 px the stroke is still 3.05 px against a 2.0 px floor. It adds iOS and Android app icons from a 1024 px master and a one-color emboss for physical products. Four mockups place the marks on a wearable face, packaging, a phone home screen and a web header, and the marks ship as vector SVG files.