diff --git a/internal/views/static/css/kafka.css b/internal/views/static/css/kafka.css
index ef45d58..f01b22c 100644
--- a/internal/views/static/css/kafka.css
+++ b/internal/views/static/css/kafka.css
@@ -24,6 +24,22 @@
   --font-mono: "IBM Plex Mono", ui-monospace, monospace;
 }
 
+[data-theme="dark"] {
+  --bg: #0f0f0f;
+  --bg-secondary: #1a1a1a;
+  --bg-tertiary: #242424;
+  --border: #2e2e2e;
+  --border-focus: #404040;
+  --text-primary: #e8eaed;
+  --text-secondary: #9aa0a6;
+  --text-muted: #6b7280;
+  --accent: #14b8a6;
+  --accent-hover: #2dd4bf;
+  --accent-soft: #134e4a;
+  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
+  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
+}
+
 *, *::before, *::after {
   box-sizing: border-box;
   margin: 0;
@@ -592,3 +608,224 @@ footer a:hover {
     gap: 0.5rem;
   }
 }
+
+/* ============================================================
+   Preferences Page
+   ============================================================ */
+
+.preferences-container {
+  max-width: 640px;
+  margin: 2rem auto;
+  padding: 0 1.5rem;
+}
+
+.preferences-title {
+  font-size: 1.5rem;
+  font-weight: 600;
+  margin-bottom: 2rem;
+  color: var(--text-primary);
+}
+
+.preferences-form {
+  display: flex;
+  flex-direction: column;
+  gap: 2rem;
+}
+
+.pref-section {
+  background: var(--bg);
+  border: 1px solid var(--border);
+  border-radius: var(--radius-md);
+  padding: 1.25rem;
+}
+
+.pref-section-title {
+  font-size: 0.7rem;
+  font-weight: 600;
+  text-transform: uppercase;
+  letter-spacing: 0.06em;
+  color: var(--text-muted);
+  margin-bottom: 1rem;
+  padding-bottom: 0.5rem;
+  border-bottom: 1px solid var(--border);
+}
+
+.pref-desc {
+  font-size: 0.8rem;
+  color: var(--text-muted);
+  margin-bottom: 1rem;
+}
+
+.pref-row {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 1rem;
+  padding: 0.75rem 0;
+  border-bottom: 1px solid var(--border);
+}
+
+.pref-row:last-child {
+  border-bottom: none;
+  padding-bottom: 0;
+}
+
+.pref-row label:first-child {
+  font-size: 0.9rem;
+  color: var(--text-primary);
+}
+
+.pref-row-info {
+  flex: 1;
+}
+
+.pref-row-info label {
+  font-weight: 500;
+}
+
+.pref-row select {
+  padding: 0.5rem 0.75rem;
+  font-size: 0.85rem;
+  font-family: inherit;
+  border: 1px solid var(--border);
+  border-radius: var(--radius-sm);
+  background: var(--bg);
+  color: var(--text-primary);
+  cursor: pointer;
+  min-width: 120px;
+}
+
+.pref-row select:focus {
+  outline: none;
+  border-color: var(--accent);
+}
+
+.theme-buttons {
+  display: flex;
+  gap: 0.5rem;
+}
+
+.theme-btn {
+  padding: 0.5rem 1rem;
+  border: 1px solid var(--border);
+  border-radius: var(--radius-sm);
+  background: var(--bg);
+  color: var(--text-secondary);
+  font-size: 0.85rem;
+  font-family: inherit;
+  cursor: pointer;
+  transition: all 0.15s;
+}
+
+.theme-btn:hover {
+  background: var(--bg-secondary);
+}
+
+.theme-btn.active {
+  background: var(--accent-soft);
+  border-color: var(--accent);
+  color: var(--accent);
+  font-weight: 500;
+}
+
+.engine-grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
+  gap: 0.5rem;
+  margin-top: 0.75rem;
+}
+
+.engine-toggle {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+  padding: 0.5rem 0.75rem;
+  background: var(--bg-secondary);
+  border-radius: var(--radius-sm);
+  font-size: 0.85rem;
+  cursor: pointer;
+  transition: background 0.15s;
+}
+
+.engine-toggle:hover {
+  background: var(--bg-tertiary);
+}
+
+.engine-toggle input[type="checkbox"] {
+  width: 16px;
+  height: 16px;
+  accent-color: var(--accent);
+  cursor: pointer;
+}
+
+.engine-toggle span {
+  color: var(--text-secondary);
+}
+
+.pref-actions {
+  display: flex;
+  gap: 1rem;
+  justify-content: flex-end;
+  padding-top: 1rem;
+}
+
+.btn-primary,
+.btn-secondary {
+  padding: 0.65rem 1.25rem;
+  border-radius: var(--radius-sm);
+  font-size: 0.9rem;
+  font-family: inherit;
+  cursor: pointer;
+  text-decoration: none;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  transition: all 0.15s;
+}
+
+.btn-primary {
+  background: var(--accent);
+  color: #fff;
+  border: none;
+}
+
+.btn-primary:hover {
+  background: var(--accent-hover);
+}
+
+.btn-secondary {
+  background: var(--bg);
+  color: var(--text-secondary);
+  border: 1px solid var(--border);
+}
+
+.btn-secondary:hover {
+  background: var(--bg-secondary);
+  color: var(--text-primary);
+}
+
+@media (max-width: 600px) {
+  .engine-grid {
+    grid-template-columns: 1fr 1fr;
+  }
+
+  .pref-row {
+    flex-direction: column;
+    align-items: flex-start;
+    gap: 0.5rem;
+  }
+
+  .pref-row select {
+    width: 100%;
+  }
+
+  .pref-actions {
+    flex-direction: column;
+  }
+
+  .btn-primary,
+  .btn-secondary {
+    width: 100%;
+    text-align: center;
+  }
+}
diff --git a/internal/views/templates/base.html b/internal/views/templates/base.html
index 103385f..6ef250d 100644
--- a/internal/views/templates/base.html
+++ b/internal/views/templates/base.html
@@ -1,6 +1,6 @@
 {{define "base"}}
 <!DOCTYPE html>
-<html lang="en">
+<html lang="en" data-theme="light">
 <head>
   <meta charset="UTF-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
@@ -11,6 +11,7 @@
   <link rel="stylesheet" href="/static/css/kafka.css">
   <link rel="icon" href="/static/img/favicon.svg" type="image/svg+xml">
   <link title="kafka" type="application/opensearchdescription+xml" rel="search" href="/opensearch.xml">
+  <script>var s=document.documentElement;s.setAttribute('data-theme',localStorage.getItem('kafka-theme')||'light');</script>
 </head>
 <body>
   <header class="site-header">
diff --git a/internal/views/templates/preferences.html b/internal/views/templates/preferences.html
index 394c27f..b10d6df 100644
--- a/internal/views/templates/preferences.html
+++ b/internal/views/templates/preferences.html
@@ -1,191 +1,142 @@
 {{define "title"}}Preferences{{end}}
 {{define "content"}}
-<div class="preferences-layout">
-  <!-- Preferences Navigation -->
-  <nav class="preferences-nav" id="preferences-nav">
-    <div class="preferences-nav-title">Settings</div>
-    <button class="preferences-nav-item active" data-section="search">🔍 Search</button>
-    <button class="preferences-nav-item" data-section="privacy">🔒 Privacy</button>
-    <button class="preferences-nav-item" data-section="tabs">📑 Tabs</button>
-    <button class="preferences-nav-item" data-section="appearance">🎨 Appearance</button>
-    <button class="preferences-nav-item" data-section="sidebar">📐 Sidebar</button>
-    <button class="preferences-nav-item" data-section="content">📄 Content</button>
-    <button class="preferences-nav-item" data-section="languages">🌍 Languages</button>
-    <button class="preferences-nav-item" data-section="regional">📍 Regional</button>
-  </nav>
+<div class="preferences-container">
+  <h1 class="preferences-title">Preferences</h1>
 
-  <!-- Preferences Content -->
-  <div class="preferences-content">
-    <!-- Search Section -->
-    <section class="pref-section" id="section-search">
-      <h2 class="pref-section-title">Search</h2>
+  <form class="preferences-form" method="POST" action="/preferences">
+    <input type="hidden" name="theme" id="theme-input" value="light">
+
+    <section class="pref-section">
+      <h2 class="pref-section-title">Appearance</h2>
       <div class="pref-row">
-        <label for="pref-default-engine">Default engine</label>
-        <select id="pref-default-engine">
-          <option value="">All engines</option>
-          <option value="wikipedia">Wikipedia</option>
-          <option value="arxiv">arXiv</option>
-          <option value="braveapi">Brave API</option>
-          <option value="duckduckgo">DuckDuckGo</option>
-          <option value="github">GitHub</option>
-          <option value="reddit">Reddit</option>
-          <option value="bing">Bing</option>
-        </select>
-      </div>
-      <div class="pref-row">
-        <label for="pref-safesearch">Safe search</label>
-        <select id="pref-safesearch">
-          <option value="moderate">Moderate</option>
-          <option value="strict">Strict</option>
-          <option value="off">Off</option>
-        </select>
-      </div>
-      <div class="pref-row">
-        <label for="pref-search-lang">Search language</label>
-        <select id="pref-search-lang">
-          <option value="">All languages</option>
-          <option value="en">English</option>
-          <option value="de">Deutsch</option>
-          <option value="fr">Français</option>
-          <option value="es">Español</option>
-          <option value="zh">中文</option>
-        </select>
+        <label>Theme</label>
+        <div class="theme-buttons">
+          <button type="button" class="theme-btn active" data-theme="light">Light</button>
+          <button type="button" class="theme-btn" data-theme="dark">Dark</button>
+        </div>
       </div>
     </section>
 
-    <!-- Privacy Section -->
-    <section class="pref-section" id="section-privacy" style="display:none;">
+    <section class="pref-section">
+      <h2 class="pref-section-title">Search Engines</h2>
+      <p class="pref-desc">Select which engines to use for searches.</p>
+      <div class="engine-grid">
+        <label class="engine-toggle">
+          <input type="checkbox" name="engine" value="google" checked>
+          <span>Google</span>
+        </label>
+        <label class="engine-toggle">
+          <input type="checkbox" name="engine" value="duckduckgo" checked>
+          <span>DuckDuckGo</span>
+        </label>
+        <label class="engine-toggle">
+          <input type="checkbox" name="engine" value="bing" checked>
+          <span>Bing</span>
+        </label>
+        <label class="engine-toggle">
+          <input type="checkbox" name="engine" value="brave" checked>
+          <span>Brave</span>
+        </label>
+        <label class="engine-toggle">
+          <input type="checkbox" name="engine" value="wikipedia" checked>
+          <span>Wikipedia</span>
+        </label>
+        <label class="engine-toggle">
+          <input type="checkbox" name="engine" value="github">
+          <span>GitHub</span>
+        </label>
+        <label class="engine-toggle">
+          <input type="checkbox" name="engine" value="reddit">
+          <span>Reddit</span>
+        </label>
+        <label class="engine-toggle">
+          <input type="checkbox" name="engine" value="youtube">
+          <span>YouTube</span>
+        </label>
+      </div>
+    </section>
+
+    <section class="pref-section">
       <h2 class="pref-section-title">Privacy</h2>
       <div class="pref-row">
         <div class="pref-row-info">
-          <label>Tracking protection</label>
-          <p class="pref-desc">Block trackers and scripts that follow you across the web.</p>
+          <label>Safe Search</label>
+          <p class="pref-desc">Filter explicit content from results</p>
         </div>
-        <input type="checkbox" id="pref-tracking" checked disabled>
-      </div>
-      <div class="pref-row">
-        <div class="pref-row-info">
-          <label>Send Do Not Track header</label>
-          <p class="pref-desc">Ask websites not to track you.</p>
-        </div>
-        <input type="checkbox" id="pref-dnt">
-      </div>
-    </section>
-
-    <!-- Tabs Section -->
-    <section class="pref-section" id="section-tabs" style="display:none;">
-      <h2 class="pref-section-title">Tabs</h2>
-      <div class="pref-row">
-        <div class="pref-row-info">
-          <label>New tab behavior</label>
-          <p class="pref-desc">Choose what happens when you open a new tab.</p>
-        </div>
-        <select id="pref-newtab">
-          <option value="blank">Blank page</option>
-          <option value="home">Homepage</option>
+        <select name="safesearch">
+          <option value="0">Off</option>
+          <option value="1" selected>Moderate</option>
+          <option value="2">Strict</option>
         </select>
       </div>
     </section>
 
-    <!-- Appearance Section -->
-    <section class="pref-section" id="section-appearance" style="display:none;">
-      <h2 class="pref-section-title">Appearance</h2>
+    <section class="pref-section">
+      <h2 class="pref-section-title">Language</h2>
       <div class="pref-row">
-        <label for="pref-theme">Theme</label>
-        <select id="pref-theme">
-          <option value="system">System</option>
-          <option value="light">Light</option>
-          <option value="dark">Dark</option>
-        </select>
-      </div>
-      <div class="pref-row">
-        <label for="pref-fontsize">Results font size</label>
-        <select id="pref-fontsize">
-          <option value="small">Small</option>
-          <option value="medium" selected>Medium</option>
-          <option value="large">Large</option>
-        </select>
-      </div>
-    </section>
-
-    <!-- Sidebar Section -->
-    <section class="pref-section" id="section-sidebar" style="display:none;">
-      <h2 class="pref-section-title">Sidebar</h2>
-      <div class="pref-row">
-        <div class="pref-row-info">
-          <label>Show sidebar on results page</label>
-          <p class="pref-desc">Display the left navigation sidebar on search results.</p>
-        </div>
-        <input type="checkbox" id="pref-show-sidebar" checked>
-      </div>
-    </section>
-
-    <!-- Content Section -->
-    <section class="pref-section" id="section-content" style="display:none;">
-      <h2 class="pref-section-title">Content</h2>
-      <div class="pref-row">
-        <div class="pref-row-info">
-          <label>Filter explicit results</label>
-          <p class="pref-desc">Hide explicit content from search results (SafeSearch).</p>
-        </div>
-        <input type="checkbox" id="pref-explicit-filter" checked>
-      </div>
-      <div class="pref-row">
-        <div class="pref-row-info">
-          <label>Auto-play media</label>
-          <p class="pref-desc">Automatically play video content when visible.</p>
-        </div>
-        <input type="checkbox" id="pref-autoplay">
-      </div>
-    </section>
-
-    <!-- Languages Section -->
-    <section class="pref-section" id="section-languages" style="display:none;">
-      <h2 class="pref-section-title">Languages</h2>
-      <div class="pref-row">
-        <label for="pref-ui-lang">Interface language</label>
-        <select id="pref-ui-lang">
-          <option value="en" selected>English</option>
-        </select>
-      </div>
-      <div class="pref-row">
-        <label for="pref-search-lang-full">Search language</label>
-        <select id="pref-search-lang-full">
-          <option value="">All languages</option>
+        <label for="search-lang">Interface &amp; Search Language</label>
+        <select name="language" id="search-lang">
+          <option value="all" selected>All languages</option>
           <option value="en">English</option>
           <option value="de">Deutsch</option>
           <option value="fr">Français</option>
           <option value="es">Español</option>
           <option value="zh">中文</option>
+          <option value="ja">日本語</option>
+          <option value="ru">Русский</option>
         </select>
       </div>
     </section>
 
-    <!-- Regional Section -->
-    <section class="pref-section" id="section-regional" style="display:none;">
-      <h2 class="pref-section-title">Regional</h2>
-      <div class="pref-row">
-        <label for="pref-region">Country/Region</label>
-        <select id="pref-region">
-          <option value="">All regions</option>
-          <option value="us">United States</option>
-          <option value="uk">United Kingdom</option>
-          <option value="de">Germany</option>
-          <option value="fr">France</option>
-          <option value="cn">China</option>
-        </select>
-      </div>
-      <div class="pref-row">
-        <label for="pref-timezone">Timezone</label>
-        <select id="pref-timezone">
-          <option value="">Auto-detect</option>
-          <option value="utc">UTC</option>
-          <option value="us-eastern">US/Eastern</option>
-          <option value="us-pacific">US/Pacific</option>
-          <option value="europe">Europe</option>
-        </select>
-      </div>
-    </section>
-  </div>
+    <div class="pref-actions">
+      <a href="/" class="btn-secondary">Cancel</a>
+      <button type="submit" class="btn-primary">Save Preferences</button>
+    </div>
+  </form>
 </div>
-{{end}}
\ No newline at end of file
+
+<script>
+(function() {
+  // Theme buttons
+  var themeInput = document.getElementById('theme-input');
+  var themeButtons = document.querySelectorAll('.theme-btn');
+
+  // Load saved theme
+  var savedTheme = localStorage.getItem('kafka-theme') || 'light';
+  themeInput.value = savedTheme;
+  document.querySelectorAll('.theme-btn').forEach(function(btn) {
+    btn.classList.toggle('active', btn.dataset.theme === savedTheme);
+  });
+  document.documentElement.setAttribute('data-theme', savedTheme);
+
+  themeButtons.forEach(function(btn) {
+    btn.addEventListener('click', function() {
+      var theme = btn.dataset.theme;
+      themeInput.value = theme;
+      themeButtons.forEach(function(b) { b.classList.remove('active'); });
+      btn.classList.add('active');
+      document.documentElement.setAttribute('data-theme', theme);
+      localStorage.setItem('kafka-theme', theme);
+    });
+  });
+
+  // Load saved engine preferences
+  var savedEngines = JSON.parse(localStorage.getItem('kafka-engines') || 'null');
+  if (savedEngines) {
+    savedEngines.forEach(function(engine) {
+      var checkbox = document.querySelector('input[name="engine"][value="' + engine.id + '"]');
+      if (checkbox) checkbox.checked = engine.enabled;
+    });
+  }
+
+  // Save on submit
+  document.querySelector('.preferences-form').addEventListener('submit', function() {
+    var engines = [];
+    document.querySelectorAll('input[name="engine"]').forEach(function(cb) {
+      engines.push({ id: cb.value, enabled: cb.checked });
+    });
+    localStorage.setItem('kafka-engines', JSON.stringify(engines));
+  });
+})();
+</script>
+{{end}}