style: light theme and hand-inked logo matching acampada26s.net

The previous pass kept the dark base and the red icons, which did not
read as the acampada. Now:

- Light theme: white page, black ink and borders, black buttons with a
  hard neon offset shadow, neon for focus and the active nav item;
  h1/h2 in Anton with the stepped neon shadow of the site headings.
- Nav, empty-state, spinner and pattern assets in black; platform icons
  keep their dark disc with a neon stroke.
- New mark: three dome tents wired from their doors into a switch with
  an antenna, drawn in the inked style of the acampada logo (curved
  poles, ball ends, hatching) over a neon offset copy. LogoMark renders
  it inline; visible product name is T-HUB.
- docs/brand: t-hub.svg and a lockup with the Anton wordmark converted
  to outlines so it renders without the font.
- Public submission page moved to the light palette.

Checked with headless Chromium screenshots (offline sample data) on
desktop and mobile.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/brand/t-hub.svg

@@ -1,40 +1,44 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 240 240" width="240" height="240" role="img" aria-labelledby="t">
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 400 400" width="400" height="400" role="img" aria-labelledby="t">
   <title id="t">T-HUB</title>
-  <circle cx="120" cy="120" r="118" fill="#000"/>
-  <circle cx="120" cy="120" r="82" fill="none" stroke="#fff" stroke-width="2" stroke-dasharray="3 7" opacity=".55"/>
-
-  <!-- cables: each leaves through a tent door and runs to the switch -->
-  <g fill="none" stroke="#00e5ff" stroke-width="4" stroke-linecap="round">
-    <path d="M49 94 C 52 122, 74 130, 96 130"/>
-    <path d="M191 94 C 188 122, 166 130, 144 130"/>
-    <path d="M120 216 C 120 196, 120 168, 120 140"/>
+  <defs>
+    <!-- Dome tent in the hand-inked style of the acampada26s.net mark:
+         curved poles with ball ends, centre seam, hatched panel, door.
+         Base midpoint at 0,0. -->
+    <g id="tienda" stroke-linecap="round" stroke-linejoin="round">
+      <path fill="none" d="M-58 0 Q-56 -66 -1 -72 Q55 -66 58 0" stroke-width="7"/>
+      <path fill="none" d="M-64 1 Q0 -3 64 1" stroke-width="6"/>
+      <path fill="none" d="M-44 0 Q-30 -58 -1 -72" stroke-width="4.5"/>
+      <path fill="none" d="M44 0 Q30 -58 -1 -72" stroke-width="4.5"/>
+      <path d="M-15 0 Q-14 -30 0 -33 Q14 -30 15 0 Z" stroke-width="4"/>
+      <path fill="none" d="M-50 -14 L-41 -25 M-50 -4 L-37 -19 M-43 -1 L-33 -13 M-52 -27 L-45 -36" stroke-width="2.6"/>
+      <path fill="none" d="M28 -50 L37 -42 M24 -40 L36 -30 M22 -29 L34 -19" stroke-width="2.6"/>
+      <circle cx="-64" cy="1" r="5.5" stroke="none"/>
+      <circle cx="64" cy="1" r="5.5" stroke="none"/>
+      <circle cx="-1" cy="-73" r="5.5" stroke="none"/>
+    </g>
+    <g id="marca" stroke-linecap="round" stroke-linejoin="round">
+      <!-- cables: out of each tent door to the switch -->
+      <path fill="none" d="M105 150 Q112 206 168 214" stroke-width="5"/>
+      <path fill="none" d="M295 150 Q288 206 232 214" stroke-width="5"/>
+      <path fill="none" d="M200 318 Q197 280 200 236" stroke-width="5"/>
+      <!-- antenna -->
+      <path fill="none" d="M200 200 Q198 160 200 118" stroke-width="6"/>
+      <path fill="none" d="M184 98 Q200 82 216 98" stroke-width="5"/>
+      <path fill="none" d="M171 88 Q200 58 229 88" stroke-width="5"/>
+      <circle cx="200" cy="112" r="7" stroke="none"/>
+      <!-- switch -->
+      <path d="M168 201 L233 200 L234 235 L167 236 Z" stroke-width="6" fill="#fff"/>
+      <path d="M179 212 h9 v11 h-9 z M196 212 h9 v11 h-9 z M213 212 h9 v11 h-9 z" stroke="none"/>
+      <use xlink:href="#tienda" transform="translate(105,150)"/>
+      <use xlink:href="#tienda" transform="translate(295,150)"/>
+      <use xlink:href="#tienda" transform="translate(200,340)"/>
+    </g>
+  </defs>
+  <!-- neon offset underneath, ink on top, as on acampada26s.net -->
+  <g transform="translate(7,7)" stroke="#00e5ff" fill="#00e5ff">
+    <use xlink:href="#marca"/>
   </g>
-
-  <!-- tents -->
-  <g stroke="#fff" stroke-width="3" stroke-linejoin="round">
-    <polygon points="19,99 49,55 79,99" fill="#000"/>
-    <polygon points="161,99 191,55 221,99" fill="#000"/>
-    <polygon points="90,221 120,177 150,221" fill="#000"/>
-  </g>
-  <g fill="#00e5ff">
-    <polygon points="40,99 49,80 58,99"/>
-    <polygon points="182,99 191,80 200,99"/>
-    <polygon points="111,221 120,202 129,221"/>
-  </g>
-
-  <!-- antenna -->
-  <line x1="120" y1="120" x2="120" y2="70" stroke="#fff" stroke-width="4" stroke-linecap="round"/>
-  <circle cx="120" cy="68" r="5" fill="#00e5ff"/>
-  <g fill="none" stroke="#00e5ff" stroke-width="3" stroke-linecap="round">
-    <path d="M106 56 A 18 18 0 0 1 134 56"/>
-    <path d="M97 46 A 30 30 0 0 1 143 46"/>
-  </g>
-
-  <!-- switch -->
-  <rect x="94" y="118" width="52" height="24" rx="3" fill="#fff"/>
-  <g fill="#000">
-    <rect x="101" y="125" width="9" height="9"/>
-    <rect x="115.5" y="125" width="9" height="9"/>
-    <rect x="130" y="125" width="9" height="9"/>
+  <g stroke="#000" fill="#000">
+    <use xlink:href="#marca"/>
   </g>
 </svg>