Add PREDVAL coverage-grid identity

README.md

@@ -1,5 +1,10 @@
 # predval
 
+<picture>
+  <source media="(prefers-color-scheme: dark)" srcset="docs/branding/predval-lockup-dark.svg">
+  <img src="docs/branding/predval-lockup-light.svg" alt="PREDVAL" width="420">
+</picture>
+
 A predictions-in validation harness for clinical prediction models.
 
 predval answers one question: **do a model's published probabilities hold up on your cohort?**

docs/branding/FONT-LICENSE.txt

@@ -0,0 +1,78 @@
+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Upstream-Name: DejaVu fonts
+Upstream-Author: Stepan Roh <src@users.sourceforge.net> (original author),
+                  see /usr/share/doc/fonts-dejavu-core/AUTHORS for full list
+Source: https://dejavu-fonts.github.io/
+
+Files: *
+Copyright: Copyright (c) 2003 by Bitstream, Inc. All Rights Reserved. 
+ Bitstream Vera is a trademark of Bitstream, Inc.
+ DejaVu changes are in public domain.
+License: bitstream-vera
+ Permission is hereby granted, free of charge, to any person obtaining a copy
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+ additional glyphs or characters may be added to the Fonts, only if the fonts
+ are renamed to names not containing either the words "Bitstream" or the word
+ "Vera".
+ .
+ This License becomes null and void to the extent applicable to Fonts or Font
+ Software that has been modified and is distributed under the "Bitstream
+ Vera" names.
+ .
+ The Font Software may be sold as part of a larger software package but no
+ copy of one or more of the Font Software typefaces may be sold by itself.
+ .
+ THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF MERCHANTABILITY,
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+Files: debian/*
+Copyright: (C) 2005-2006 Peter Cernak <pce@users.sourceforge.net> 
+           (C) 2006-2011 Davide Viti <zinosat@tiscali.it>
+           (C) 2011-2013 Christian Perrier <bubulle@debian.org>
+           (C) 2013 Fabian Greffrath <fabian+debian@greffrath.com>
+License: GPL-2+
+ This program is free software; you can redistribute it
+ and/or modify it under the terms of the GNU General Public
+ License as published by the Free Software Foundation; either
+ version 2 of the License, or (at your option) any later
+ version.
+ .
+ This program is distributed in the hope that it will be
+ useful, but WITHOUT ANY WARRANTY; without even the implied
+ warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ PURPOSE.  See the GNU General Public License for more
+ details.
+ .
+ You should have received a copy of the GNU General Public
+ License along with this package; if not, write to the Free
+ Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ Boston, MA  02110-1301 USA
+ .
+ On Debian systems, the full text of the GNU General Public
+ License version 2 can be found in the file
+ /usr/share/common-licenses/GPL-2'.

docs/branding/README.md

@@ -0,0 +1,18 @@
+# PREDVAL identity
+
+The coverage-grid mark represents a declared roster: one open cell, one highlighted cell, and a pair of brackets. It is a project identity, not a clinical certification mark.
+
+## Assets
+
+- `predval-lockup-light.svg` and `predval-lockup-dark.svg`: horizontal logo for light and dark backgrounds.
+- `predval-icon-light.svg` and `predval-icon-dark.svg`: standalone square icon.
+
+All assets are transparent SVGs. Wordmarks use outlined paths and require no installed font. The root README selects the dark asset using `prefers-color-scheme` and supplies a light fallback with descriptive alt text.
+
+## Usage
+
+Use the light assets on white and the dark assets on a dark background such as `#0C1626`. Keep the horizontal logo at least 240 px wide. The icon has been checked at 32, 128, and 512 px. Preserve its aspect ratio and leave at least one grid-cell width of clear space around unrelated content.
+
+Palette: navy `#112D49`, violet `#6952C7`; dark-background foreground `#EDF3FA`, violet `#AD9AF4`.
+
+The wordmark is derived from DejaVu Sans Bold, with custom tracking and conversion to paths. See [FONT-LICENSE.txt](FONT-LICENSE.txt) for the font copyright and license notice. No font binaries are included.