diff --git a/public/logo/sigil-favicon.png b/public/logo/sigil-favicon.png
index 317d43a..5247e3d 100644
Binary files a/public/logo/sigil-favicon.png and b/public/logo/sigil-favicon.png differ
diff --git a/theme.config.tsx b/theme.config.tsx
index e1ba6f2..b87b850 100644
--- a/theme.config.tsx
+++ b/theme.config.tsx
@@ -3,15 +3,26 @@ import type { DocsThemeConfig } from "nextra-theme-docs";
 import { useConfig } from "nextra-theme-docs";
 import { DocsCta, DocsMain } from "@/components/DocsShell";
 
+// Brand mark — traced isometric S-hexagon, inline so it always renders white
+// on the dark docs skin (currentColor → the logo text color).
 const SigilixMark = () => (
   <span className="sig-docs-logo">
-    <img
-      src="/logo/sigil-favicon.png"
-      alt=""
-      aria-hidden="true"
+    <svg
+      viewBox="0 0 1254 1254"
+      xmlns="http://www.w3.org/2000/svg"
       width={24}
       height={24}
-    />
+      aria-hidden="true"
+      style={{ color: "#ffffff", flexShrink: 0 }}
+    >
+      <g
+        transform="translate(0.000000,1254.000000) scale(0.100000,-0.100000)"
+        fill="currentColor"
+        stroke="none"
+      >
+        <path d="M5479 9567 c-431 -266 -944 -583 -1139 -704 -195 -121 -435 -268 -532 -328 l-178 -108 0 -759 0 -758 83 -54 c144 -95 1011 -656 1337 -866 173 -111 410 -264 525 -338 116 -75 307 -198 425 -275 179 -116 218 -138 237 -131 32 13 762 498 763 507 0 4 -26 24 -57 44 -32 20 -204 132 -383 248 -179 116 -461 298 -628 405 -166 107 -434 280 -595 384 -290 187 -631 406 -675 433 -37 23 -79 98 -97 174 -13 54 -16 100 -13 202 4 118 7 138 31 189 44 90 -24 44 917 623 639 393 775 475 788 475 21 0 523 -307 1857 -1135 533 -331 766 -475 770 -475 3 0 5 254 5 564 l0 564 -232 145 c-128 80 -321 199 -428 264 -107 66 -316 196 -465 288 -281 175 -1275 785 -1403 861 -41 24 -86 44 -101 44 -19 0 -279 -155 -812 -483z M5840 7870 c-239 -149 -438 -270 -442 -270 -26 0 7 -27 125 -101 72 -45 213 -135 312 -199 99 -64 261 -168 360 -232 452 -289 1181 -759 1493 -962 l102 -66 -1 -278 c0 -196 -4 -287 -13 -312 -11 -30 -46 -57 -252 -195 -131 -88 -462 -311 -734 -495 -272 -184 -501 -334 -510 -334 -17 0 -54 24 -840 544 -669 442 -844 557 -1150 755 -530 343 -643 415 -651 415 -5 0 -9 -253 -9 -563 l0 -563 33 -19 c121 -71 1359 -878 2189 -1427 l436 -289 684 452 c852 564 1803 1192 1885 1244 l63 40 0 725 0 725 -332 210 c-183 116 -405 257 -493 314 -88 57 -293 188 -455 291 -162 103 -533 339 -824 524 -290 185 -531 336 -535 336 -3 -1 -202 -122 -441 -270z" />
+      </g>
+    </svg>
     <span className="sig-docs-logo-word">Sigilix</span>
     <span className="sig-docs-logo-kicker">Docs</span>
   </span>