diff --git a/index.html b/index.html
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+++ b/index.html
@@ -1 +1,157 @@
-# placeholder
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>QElectroTech – Nightly Builds</title>
+  <style>
+    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
+    body {
+      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
+      background: #f0f4f8;
+      color: #2d3748;
+      min-height: 100vh;
+    }
+    header {
+      background: linear-gradient(135deg, #1a365d 0%, #2b6cb0 100%);
+      color: white;
+      padding: 48px 24px 40px;
+      text-align: center;
+    }
+    header h1 { font-size: 2.2em; letter-spacing: -0.5px; margin-bottom: 8px; }
+    header p  { opacity: 0.8; font-size: 1.05em; }
+    main {
+      max-width: 680px;
+      margin: 40px auto;
+      padding: 0 20px 60px;
+    }
+    .card {
+      background: white;
+      border-radius: 12px;
+      padding: 28px;
+      margin-bottom: 24px;
+      box-shadow: 0 2px 12px rgba(0,0,0,0.08);
+    }
+    .card h2 {
+      font-size: 1em;
+      text-transform: uppercase;
+      letter-spacing: 0.06em;
+      color: #718096;
+      margin-bottom: 16px;
+    }
+    .meta {
+      font-size: 0.875em;
+      color: #4a5568;
+      line-height: 1.8;
+      margin-bottom: 20px;
+    }
+    .meta a { color: #2b6cb0; text-decoration: none; }
+    .meta a:hover { text-decoration: underline; }
+    .badge {
+      display: inline-block;
+      background: #ebf8ff;
+      color: #2b6cb0;
+      border-radius: 4px;
+      font-size: 0.8em;
+      font-weight: 600;
+      padding: 2px 8px;
+      margin-left: 6px;
+      vertical-align: middle;
+    }
+    .warning {
+      background: #fffbeb;
+      border-left: 4px solid #f6ad55;
+      border-radius: 4px;
+      padding: 12px 16px;
+      font-size: 0.875em;
+      color: #744210;
+      margin-bottom: 24px;
+      line-height: 1.5;
+    }
+    .warning a { color: #c05621; }
+    .downloads { display: flex; flex-direction: column; gap: 12px; }
+    .btn {
+      display: flex;
+      align-items: center;
+      gap: 12px;
+      padding: 14px 20px;
+      border-radius: 8px;
+      font-size: 0.95em;
+      font-weight: 600;
+      text-decoration: none;
+      transition: transform 0.1s, box-shadow 0.1s;
+    }
+    .btn:hover {
+      transform: translateY(-1px);
+      box-shadow: 0 4px 12px rgba(0,0,0,0.15);
+    }
+    .btn-primary { background: #2b6cb0; color: white; }
+    .btn-secondary { background: #edf2f7; color: #2d3748; }
+    .btn-icon { font-size: 1.3em; }
+    .btn-text small {
+      display: block;
+      font-weight: 400;
+      font-size: 0.8em;
+      opacity: 0.75;
+      margin-top: 1px;
+    }
+    footer {
+      text-align: center;
+      font-size: 0.8em;
+      color: #a0aec0;
+      padding: 32px 0 0;
+    }
+    footer a { color: #718096; text-decoration: none; }
+  </style>
+</head>
+<body>
+  <header>
+    <h1>⚡ QElectroTech</h1>
+    <p>Nightly Windows Builds</p>
+  </header>
+
+  <main>
+    <div class="card">
+      <h2>Build info</h2>
+      <div class="meta">
+        📅 &nbsp;<strong>2026-05-10 10:31 UTC</strong><br>
+        🔀 &nbsp;Commit <a href="https://github.com/qelectrotech/qelectrotech-source-mirror/commit/b8ed1713a7c5a72355a6c4b2edd9a24872fd7111"><code>b8ed171</code></a><br>
+        🔧 &nbsp;<a href="https://github.com/qelectrotech/qelectrotech-source-mirror/actions/runs/25626174020">CI Run #15</a>
+        <span class="badge">nightly</span>
+      </div>
+      <div class="warning">
+        ⚠️ These builds are generated automatically on every commit to <code>master</code>
+        and may be unstable or incomplete.
+        For production use, download a
+        <a href="https://github.com/qelectrotech/qelectrotech-source-mirror/releases">stable release</a>.
+      </div>
+    </div>
+
+    <div class="card">
+      <h2>🪟 Windows — x86_64</h2>
+      <div class="downloads">
+        <a class="btn btn-primary" href="https://github.com/qelectrotech/qelectrotech-source-mirror/releases/download/nightly/Installer_QElectroTech-0.100.1-r8755-b8ed1713a_x86_64-win64-1.exe">
+          <span class="btn-icon">⬇</span>
+          <span class="btn-text">
+            Windows Installer
+            <small>.exe — recommended, includes all dependencies</small>
+          </span>
+        </a>
+        <a class="btn btn-secondary" href="https://github.com/qelectrotech/qelectrotech-source-mirror/releases/tag/nightly">
+          <span class="btn-icon">📦</span>
+          <span class="btn-text">
+            All nightly files on GitHub
+            <small>Release page with checksums</small>
+          </span>
+        </a>
+      </div>
+    </div>
+  </main>
+
+  <footer>
+    Auto-generated by GitHub Actions &nbsp;·&nbsp;
+    <a href="https://github.com/qelectrotech/qelectrotech-source-mirror">Source on GitHub</a> &nbsp;·&nbsp;
+    <a href="https://qelectrotech.org">qelectrotech.org</a>
+  </footer>
+</body>
+</html>
