# Equation brand kit

The Equation mark is the **Converge** glyph: three lines of evidence resolving
into one decision. The lines are cut into a solid hexagon and the decision
dot is orange.

## Colours

| Name | Hex | Use |
|---|---|---|
| Ink | `#0A0A0A` | Hexagon, wordmark, text |
| Paper | `#FFFFFF` | Lines on the black hexagon, backgrounds |
| Signal orange | `#F97316` | The decision dot only |

The orange belongs to the dot. Do not recolour the hexagon or the lines.

## Which file to use

| Where | File |
|---|---|
| Website nav, footer, sign-in card, app header (light UI) | `svg/sencius-mark.svg` (the app serves it as `/brand/logo.svg`) next to the live "EQUATION" text |
| Dark UI, dark slides, dark video end cards | `svg/sencius-mark-reverse.svg` (served as `/brand/logo-white.svg`) |
| Documents, decks, email signatures, partner pages (light) | `svg/sencius-lockup.svg` or `png/lockup/sencius-lockup-{32h..512h}.png` |
| The same on dark backgrounds | `svg/sencius-lockup-reverse.svg` or `png/lockup-reverse/…` |
| Print in one ink, stamps, embossing, laser etching | `svg/sencius-mark-black.svg` / `svg/sencius-mark-white.svg` (the glyph is cut out, so the paper shows through) |
| Social avatars (LinkedIn, X, YouTube, GitHub) | `png/app-icon/sencius-app-icon-1024.png` (white ground) or `png/app-icon-dark/sencius-app-icon-dark-1024.png` |
| App stores and PWA install | `png/app-icon/sencius-app-icon-1024.png`; the site ships `/brand/icon-192.png`, `/brand/icon-512.png`, `/brand/maskable-512.png` |
| Browser tab | `/favicon.ico` (16, 32, 48) and `/brand/icon-16.png`, `/brand/icon-32.png` |
| iOS home screen | `/brand/apple-icon-180.png` |
| Android notifications | `/brand/badge-72.png` (white silhouette; Android uses only its shape) |
| Link previews (Slack, LinkedIn, X, iMessage) | `/og-image.png` (1200 × 630) |

## Sizes

Every PNG folder has 16, 24, 32, 48, 64, 96, 128, 180, 192, 256, 384, 512 and 1024 px.
Sizes of 48 px and below use a heavier cut of the glyph so the lines and the dot stay clear.

| Folder | What it is | Background |
|---|---|---|
| `png/mark/` | Primary mark | Transparent |
| `png/mark-reverse/` | White hexagon for dark backgrounds | Transparent |
| `png/mark-black/`, `png/mark-white/` | One colour, glyph cut out | Transparent |
| `png/app-icon/` | Mark on a white square (large sizes keep a crop-safe margin) | White |
| `png/app-icon-dark/` | White hexagon on a black rounded tile | Black |
| `png/lockup/`, `png/lockup-reverse/` | Mark + EQUATION wordmark, by height (32h to 512h) | Transparent |

## Rules

- **Clear space:** keep empty space around the mark of at least half the hexagon's width.
- **Minimum size:** 16 px for the mark on screen, 10 mm in print. Use the lockup at 24 px tall or more.
- **Wordmark:** "EQUATION" in capitals, Inter SemiBold, letter-spacing 0.08em. In the product it stays live text, not an image.
- **Don't** stretch, rotate, outline or add shadows to the mark; change the dot colour; put the black hexagon on a dark background (use the reverse version); or place the mark on a busy photo without a solid panel behind it.