Add logo, animated explainer, trust section and photo-privacy guides

Reposition around EXIF/GPS/C2PA privacy, replace dead HowTo/FAQ schema,
add three guide pages with sitemap and internal links.

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

guides/index.html

@@ -0,0 +1,46 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover" />
+    <title>Photo privacy guides: EXIF, GPS and C2PA | Untrace</title>
+    <meta name="description" content="Plain-language guides to the hidden data inside photos: EXIF, GPS location and C2PA Content Credentials, and how to remove them." />
+    <link rel="canonical" href="https://untrace.realbrain.cc/guides/" />
+    <meta name="robots" content="index, follow, max-image-preview:large, max-snippet:-1" />
+    <meta name="color-scheme" content="dark light" />
+    <meta name="theme-color" content="#080808" media="(prefers-color-scheme: dark)" />
+    <meta name="theme-color" content="#F7F7F9" media="(prefers-color-scheme: light)" />
+    <script>(function(){try{var s=localStorage.getItem("untrace-theme");var t=s==="light"||s==="dark"?s:window.matchMedia("(prefers-color-scheme: light)").matches?"light":"dark";if(t==="light")document.documentElement.setAttribute("data-theme","light")}catch(e){}})();</script>
+    <link rel="icon" type="image/svg+xml" href="/favicon.svg" />
+    <link rel="apple-touch-icon" href="/apple-touch-icon.png" />
+    <link rel="manifest" href="/manifest.json" />
+    <link rel="preconnect" href="https://fonts.googleapis.com" />
+    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
+    <link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&amp;family=IBM+Plex+Sans:wght@400;500;600&amp;display=swap" />
+    <meta property="og:type" content="website" />
+    <meta property="og:site_name" content="Untrace" />
+    <meta property="og:url" content="https://untrace.realbrain.cc/guides/" />
+    <meta property="og:title" content="Photo privacy guides" />
+    <meta property="og:description" content="Plain-language guides to the hidden data inside photos: EXIF, GPS location and C2PA Content Credentials, and how to remove them." />
+    <meta property="og:image" content="https://untrace.realbrain.cc/thumb.jpg" />
+    <meta name="twitter:card" content="summary_large_image" />
+      </head>
+  <body>
+    <header class="topbar">
+      <div class="wrap inner">
+        <a class="wordmark" href="/" aria-label="Untrace home"><span class="r-mark" aria-hidden="true"><svg viewBox="0 0 24 24" width="18" height="18" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" focusable="false"><path d="M15 4.5H8A3.5 3.5 0 0 0 4.5 8v8A3.5 3.5 0 0 0 8 19.5h7"/><path d="M18.5 4.5v.01M18.5 9v.01M18.5 14v.01M18.5 19v.01" stroke-width="2.4" opacity="0.55"/><path d="M21 4.5v.01M21 9v.01" stroke-width="2" opacity="0.28"/><path d="M8 15.5 11 12l2 2.2 1.5-1.7"/></svg></span><span>Untrace</span></a>
+        <nav class="actions" aria-label="Site"><a class="btn btn-ghost" href="/">Clean a photo</a></nav>
+      </div>
+    </header>
+    <main class="guide">
+      <div class="wrap">
+        <article>
+          <h1>Photo privacy guides</h1>
+          <p class="lead">Plain-language explanations of the hidden data inside photos, and how to remove it.</p>
+        </article>
+        <div class="index-list"><a class="card" href="/guides/remove-gps-from-photo/"><strong>How to remove GPS location from a photo</strong><span>Most phones save the exact latitude and longitude of every photo they take. If the file keeps that data when you share it, anyone who receives it can read where you were.</span></a><a class="card" href="/guides/what-is-exif-data/"><strong>What is EXIF data?</strong><span>EXIF (Exchangeable Image File Format) is a block of hidden information that cameras and phones write into a photo file. It travels with the picture unless something removes it.</span></a><a class="card" href="/guides/what-is-c2pa/"><strong>What is C2PA and how do Content Credentials work?</strong><span>C2PA is an open standard from the Coalition for Content Provenance and Authenticity. It lets software attach a cryptographically signed record to an image describing where it came from and how it was changed.</span></a></div>
+      </div>
+    </main>
+    <script type="module" src="/src/guide.js"></script>
+  </body>
+</html>