diff --git a/www/assets/css/app.css b/www/assets/css/app.css
index eb6cfb1..9af60d0 100644
--- a/www/assets/css/app.css
+++ b/www/assets/css/app.css
@@ -42,6 +42,7 @@
   --color-accent:      #2e7de9;  /* primary brand blue */
   --color-accent-ink:  #1b5fc4;  /* accent text on light bg (AA) */
   --color-accent-soft: #dceafb;  /* accent tint fills */
+  --color-brand:       #334155;  /* logo lockup (mark + wordmark) — neutral slate */
   --color-green:       #587539;
   --color-green-soft:  #dcead0;
   --color-yellow:      #8c6c3e;
@@ -79,6 +80,7 @@
     --color-accent:      #7aa2f7;
     --color-accent-ink:  #a9c2ff;
     --color-accent-soft: #243049;
+    --color-brand:       #cbd5e1;  /* logo lockup — light slate for dark bg */
     --color-green:       #9ece6a;
     --color-green-soft:  #25332a;
     --color-yellow:      #e0af68;
@@ -111,6 +113,7 @@
   --color-accent:      #7aa2f7;
   --color-accent-ink:  #a9c2ff;
   --color-accent-soft: #243049;
+  --color-brand:       #cbd5e1;  /* logo lockup — light slate for dark bg */
   --color-green:       #9ece6a;
   --color-green-soft:  #25332a;
   --color-yellow:      #e0af68;
diff --git a/www/layouts/partials/brand.html b/www/layouts/partials/brand.html
index 051e8b3..4913430 100644
--- a/www/layouts/partials/brand.html
+++ b/www/layouts/partials/brand.html
@@ -1,8 +1,14 @@
-{{- /* brand.html — logo badge + "herdr plus" wordmark. Param: .size ("sm"|"md") */ -}}
+{{- /* brand.html — "herdr" wordmark + a hairline plus glyph that reads as the
+       "+" of herdr+. Mark + wordmark share one cohesive, theme-aware color
+       (--color-brand) so the whole lockup adapts between light/dark.
+       Param: .size ("sm"|"md") */ -}}
 {{- $size := .size | default "md" -}}
-{{- $badge := cond (eq $size "sm") "h-7 w-7" "h-8 w-8" -}}
+{{- $mark := cond (eq $size "sm") "h-[22px] w-[22px]" "h-[26px] w-[26px]" -}}
 {{- $text := cond (eq $size "sm") "text-lg" "text-xl" -}}
-<span class="inline-flex items-center gap-2.5">
-  <img src="{{ "images/logo.svg" | relURL }}" alt="" width="32" height="32" class="{{ $badge }} rounded-[9px]">
-  <span class="font-mono {{ $text }} font-semibold tracking-tight" style="color:var(--color-ink)">herdr<span style="color:var(--color-accent-ink)"> plus</span></span>
+<span class="inline-flex items-center gap-[1px]" style="color:var(--color-brand)">
+  <span class="font-sans {{ $text }} font-semibold tracking-[-0.02em] leading-none">herdr</span>
+  {{- /* hairline plus, optically centered, inherits the lockup color via currentColor */ -}}
+  <svg class="{{ $mark }}" viewBox="0 0 64 64" fill="none" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false">
+    <path d="M32 9V55M9 32H55" stroke="currentColor" stroke-width="6" stroke-linecap="round"/>
+  </svg>
 </span>
diff --git a/www/static/images/apple-touch-icon.png b/www/static/images/apple-touch-icon.png
index 303407d..fd5cdb2 100644
Binary files a/www/static/images/apple-touch-icon.png and b/www/static/images/apple-touch-icon.png differ
diff --git a/www/static/images/favicon-32.png b/www/static/images/favicon-32.png
index 303407d..fd5cdb2 100644
Binary files a/www/static/images/favicon-32.png and b/www/static/images/favicon-32.png differ
diff --git a/www/static/images/favicon.ico b/www/static/images/favicon.ico
index cb79eea..1c71d42 100644
Binary files a/www/static/images/favicon.ico and b/www/static/images/favicon.ico differ
diff --git a/www/static/images/icon-16.png b/www/static/images/icon-16.png
index 303407d..fd5cdb2 100644
Binary files a/www/static/images/icon-16.png and b/www/static/images/icon-16.png differ
diff --git a/www/static/images/icon-180.png b/www/static/images/icon-180.png
index 303407d..fd5cdb2 100644
Binary files a/www/static/images/icon-180.png and b/www/static/images/icon-180.png differ
diff --git a/www/static/images/icon-256.png b/www/static/images/icon-256.png
index 303407d..fd5cdb2 100644
Binary files a/www/static/images/icon-256.png and b/www/static/images/icon-256.png differ
diff --git a/www/static/images/icon-32.png b/www/static/images/icon-32.png
index 303407d..fd5cdb2 100644
Binary files a/www/static/images/icon-32.png and b/www/static/images/icon-32.png differ
diff --git a/www/static/images/icon-512.png b/www/static/images/icon-512.png
index 303407d..fd5cdb2 100644
Binary files a/www/static/images/icon-512.png and b/www/static/images/icon-512.png differ
diff --git a/www/static/images/logo.svg b/www/static/images/logo.svg
index 0b027b9..e476c6f 100644
--- a/www/static/images/logo.svg
+++ b/www/static/images/logo.svg
@@ -1,23 +1,16 @@
 <!--
-  logo.svg — herdr-plus brand mark
-  Created on 2026-06-09. Copyright © 2026 Cloudmanic Labs, LLC.
-  A squircle badge in the Tokyo Night Light blue→indigo gradient with a white
-  "+" — the "plus" is the whole idea: extensions layered on top of herdr.
+  logo.svg — herdr-plus brand mark (favicon)
+  Created on 2026-06-11. Copyright © 2026 Cloudmanic Labs, LLC.
+  A minimal hairline "+" in slate — the "plus" is the whole idea: extensions
+  layered on top of herdr. Standalone, no badge. Used only as the SVG favicon
+  (the in-page lockup inlines its own currentColor copy). The embedded style
+  adapts the stroke to the browser's color scheme: slate on light chrome, a
+  soft light-slate on dark chrome.
 -->
 <svg width="64" height="64" viewBox="0 0 64 64" fill="none" xmlns="http://www.w3.org/2000/svg" role="img" aria-label="herdr plus">
-  <defs>
-    <linearGradient id="hp-grad" x1="8" y1="6" x2="56" y2="60" gradientUnits="userSpaceOnUse">
-      <stop stop-color="#4f93f0"/>
-      <stop offset="0.55" stop-color="#2e7de9"/>
-      <stop offset="1" stop-color="#2a4ba6"/>
-    </linearGradient>
-    <linearGradient id="hp-sheen" x1="32" y1="4" x2="32" y2="34" gradientUnits="userSpaceOnUse">
-      <stop stop-color="#ffffff" stop-opacity="0.28"/>
-      <stop offset="1" stop-color="#ffffff" stop-opacity="0"/>
-    </linearGradient>
-  </defs>
-  <rect x="3" y="3" width="58" height="58" rx="16" fill="url(#hp-grad)"/>
-  <rect x="3" y="3" width="58" height="58" rx="16" fill="url(#hp-sheen)"/>
-  <rect x="3.5" y="3.5" width="57" height="57" rx="15.5" stroke="#ffffff" stroke-opacity="0.18"/>
-  <path d="M32 18.5V45.5M18.5 32H45.5" stroke="#ffffff" stroke-width="7" stroke-linecap="round"/>
+  <style>
+    .mark { stroke: #334155; }
+    @media (prefers-color-scheme: dark) { .mark { stroke: #cbd5e1; } }
+  </style>
+  <path class="mark" d="M32 8V56M8 32H56" stroke-width="6" stroke-linecap="round"/>
 </svg>
diff --git a/www/static/images/og.png b/www/static/images/og.png
index 1d21122..cb9a34f 100644
Binary files a/www/static/images/og.png and b/www/static/images/og.png differ