ROAD SIGN MATH — IDENTITY COLLECTION v1.0
Prepared October 31, 2026

THE COLLECTION
Highway is the primary logo and default app icon: a square-root radical becomes
an exit arrow. Sunshine uses exactly the same silhouette in yellow and deep
green. Division carries the exit-arrow language into a division glyph. Factorial
puts 3! on a route shield. Four Ways puts +, minus, multiplication, and division
on a green sign plate.

OPEN FIRST
previews/collection.png — the whole collection, primary logo, and size checks.

INDIVIDUAL APP ICONS
icons/png-1024/highway.png        Default
icons/png-1024/sunshine.png       Alternate
icons/png-1024/division.png       Alternate
icons/png-1024/factorial.png      Alternate
icons/png-1024/four-ways.png      Alternate

Each is a full 1024 x 1024 square, solid-color RGB PNG with an sRGB profile.
The corners are intentionally filled. The operating system applies its mask.
Do not use the rounded preview images as app-icon source artwork.

EDITABLE ICON ARTWORK AND LAYERS
icons/svg/ — five vector master SVGs, one per icon. Shapes remain editable.
icons/layers/<name>/ — aligned background and foreground in SVG and PNG.
Each layer uses the same 1024 x 1024 canvas; do not trim transparent margins.
The foreground PNGs have transparent backgrounds; background PNGs are opaque.
These files are source material for a future Icon Composer / Xcode handoff.
A native .icon document and separate dark, clear, or tinted appearance variants
are not included. Check system-rendered appearances during app integration.
No code, asset catalogs, settings, or application behavior was changed.

PRIMARY LOGO AND WORDMARK
logo/lockup-horizontal-color.svg / .png — green signature plus ink wordmark.
logo/lockup-horizontal-green.svg / .png — all-green horizontal logo.
logo/lockup-horizontal-white.svg / .png — reversed logo for dark backgrounds.
logo/lockup-stacked-green.svg / .png — centered vertical arrangement.
logo/lockup-stacked-white.svg / .png — reversed vertical arrangement.
logo/wordmark-green.svg / .png — words alone, highway green.
logo/wordmark-ink.svg / .png — words alone, dark ink.
logo/wordmark-white.svg / .png — words alone, white.
logo/mark-green.svg / .png — unframed Radical Route signature alone.
logo/mark-ink.svg / .png — signature alone in dark ink.
logo/mark-white.svg / .png — signature alone in white.

All logo PNGs have transparent backgrounds. White artwork may look blank
against a white viewer: place it on a dark background. Logo SVG lettering is
converted to vector paths, so the files do not require installed fonts.
Use SVGs for scaling; PNG lockups and wordmarks are exported 2400 pixels wide.
The standalone mark PNGs are 1024 pixels square.

TYPE
Overpass, weight 900, with optical kerning and slightly tightened tracking.
This keeps the identity related to the app's existing road-sign-inspired type.
type/Overpass-variable.ttf is the unmodified original font from the app's
public repository. Its SIL Open Font License is included alongside it.
type/wordmark-live-type.svg is the editable text source. Install the included
font before opening that file. Use the outlined logo files for distribution.

COLOR
Highway green  #006348   Default icon and primary signature
Deep green     #004A36   Symbols on yellow, dark presentation ground
Sign yellow    #F2B300   Sunshine, Division, and Factorial backgrounds
Ink            #18201C   Primary wordmark on light backgrounds
Paper          #F3F5F2   Presentation background, not an app-icon border
White          #FFFFFF   Symbols on green and reversed logos

USAGE
Preserve each mark's proportions; scale uniformly. Keep clear space around
the primary logo at least equal to the thickness of the signature's horizontal
stroke. Do not add outlines, gradients, shadows, or warning-sign enclosures.
Use the complete supplied icon canvas rather than resizing the symbol within it.
Rounded previews are approximate presentation masks, not Apple's exact mask.
Small-size previews at 64, 40, and 24 pixels are in previews/small/.

PRODUCTION CHECKS
All five icon PNGs are square, opaque RGB, 1024 x 1024, and tagged sRGB.
All foreground layers stay inside the shared canvas without edge clipping.
Highway and Sunshine share byte-identical foreground alpha geometry.
Layer compositing was compared with the flat icon exports.
All distribution SVGs contain real vector shapes, not embedded bitmaps or
font-dependent text. Lettering remains legible in the supplied size previews.
This is a design handoff, not an installed or submitted app-icon set.

PROVENANCE AND SCOPE
The concepts were explored with OpenAI image generation in the design session.
Final artwork was redrawn as deterministic vector geometry with outlined type;
it is not a crop or automatic bitmap trace of those concept sheets.
Everything in this package was prepared outside the app and website repos.

REFERENCES
Apple: App icons
https://developer.apple.com/design/human-interface-guidelines/app-icons
Apple: Configuring your app icon using an asset catalog
https://developer.apple.com/documentation/xcode/configuring-your-app-icon
Overpass source and license in the app repository
https://github.com/jthingelstad/roadsignmath-ios/tree/main/RoadSignMath/Fonts
