diff --git a/TODO.md b/TODO.md
index f6cfd4a..00ea28e 100644
--- a/TODO.md
+++ b/TODO.md
@@ -445,9 +445,9 @@ Goal: rename the tables and column to the canonical M2M pattern (`tags`, `thesis
       to avoid filesystem churn. At minimum, move the cache dir to `/tmp` or a dedicated
       `storage/cache/` path that is excluded from deploy rsync.
 
-- [ ] **`__wakeup()` singleton guard throws from a public method** - PHP 8.x deprecates
-      throwing exceptions from `__wakeup`. Change to `trigger_error(..., E_USER_ERROR)` or implement
-      `__serialize()`/`__unserialize()` that always throw.
+- [x] **`__wakeup()` singleton guard throws from a public method** - changed to
+      `trigger_error('Cannot unserialize singleton ...', E_USER_ERROR)` with explicit `void` return
+      type; eliminates the PHP 8.x deprecation notice.
 
 ---
 
@@ -509,10 +509,9 @@ Goal: rename the tables and column to the canonical M2M pattern (`tags`, `thesis
 
 ### F - Template logic / PHP in templates
 
-- [ ] **Rate-limit 429 response in `search.php` emits unstyled bare HTML** - the early-exit block
-      outputs `<!DOCTYPE html><html><body><h1>Trop de requêtes</h1>...` with no stylesheet, no lang,
-      no viewport meta. Style it inline-minimally or redirect to a consistent `429.php` page (like
-      `maintenance.php`).
+- [x] **Rate-limit 429 response in `search.php` emits unstyled bare HTML** - replaced bare echo with
+      a properly structured HTML document (lang="fr", viewport meta, inline dark styles matching
+      `maintenance.php`); `$retrySeconds` injected into the user-facing message.
 
 - [ ] **`apropos.php` contacts and credits are hardcoded in the template** - names, roles, emails
       (Laurent Leprince, Xavier Gorgol, Brigitte Ledune) and credits text live in PHP/HTML and
@@ -957,11 +956,10 @@ Current state: **zero ARIA attributes, zero skip links, zero focus-visible style
       structure. There is no programmatic association between label and value. Replacing with
       `<dl>/<dt>/<dd>` (already flagged in the semantic audit) directly fixes this criterion.
 
-- [ ] **Search filter `<select>` elements have no associated `<label>`** - each select is
-      preceded by `<span class="search-filter-label">Année</span>` but this span is not a
-      `<label>` and has no `for` attribute. Screen readers cannot associate it with the control.
-      Fix: replace `<span>` with `<label for="filter-year">` and add `id="filter-year"` to
-      the select (or use the wrapping-label pattern).
+- [x] **Search filter `<select>` elements have no associated `<label>`** - replaced the three
+      `<span class="search-filter-label">` elements with `<label for="filter-year">`,
+      `<label for="filter-orientation">`, `<label for="filter-ap">`; added matching `id` attributes
+      to the `<select>` elements. Visual appearance unchanged (same CSS class).
 
 - [ ] **Admin form rows: `<label class="admin-label" for="X">` is correct** - the `for` attribute
       is present on all single-input rows in `add.php` and `edit.php`. Good. However, the
diff --git a/public/search.php b/public/search.php
index 8428913..8520a17 100644
--- a/public/search.php
+++ b/public/search.php
@@ -8,7 +8,46 @@ $rateLimit = new RateLimit(30, 60);
 if (!$rateLimit->check()) {
     http_response_code(429);
     header('Retry-After: ' . $rateLimit->getResetTime());
-    echo '<!DOCTYPE html><html lang="fr"><body><h1>Trop de requêtes</h1><p>Réessayez dans ' . $rateLimit->getResetTime() . ' secondes.</p></body></html>';
+    $retrySeconds = (int)$rateLimit->getResetTime();
+    echo <<<HTML
+<!DOCTYPE html>
+<html lang="fr">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <title>Trop de requêtes – Posterg</title>
+    <style>
+        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
+        body {
+            background: #0d0d0d;
+            color: #e0e0e0;
+            font-family: 'Helvetica Neue', Arial, sans-serif;
+            min-height: 100vh;
+            display: flex;
+            align-items: center;
+            justify-content: center;
+            padding: 2rem;
+        }
+        .box { max-width: 520px; text-align: center; }
+        .box__logo {
+            font-size: 1.1rem; font-weight: 700;
+            letter-spacing: .12em; text-transform: uppercase;
+            color: #fff; margin-bottom: 2.5rem;
+        }
+        .box__title { font-size: 1.6rem; font-weight: 300; margin-bottom: 1rem; }
+        .box__text  { font-size: .95rem; color: #999; line-height: 1.7; }
+    </style>
+</head>
+<body>
+    <div class="box">
+        <div class="box__logo">POSTERG</div>
+        <h1 class="box__title">Trop de requêtes</h1>
+        <p class="box__text">Vous avez effectué trop de recherches en peu de temps.<br>
+        Réessayez dans {$retrySeconds} secondes.</p>
+    </div>
+</body>
+</html>
+HTML;
     exit;
 }
 $rateLimit->sendHeaders();
@@ -91,8 +130,8 @@ $extraCss = ['assets/search.css'];
         <input type="hidden" name="query" value="<?= htmlspecialchars($_GET['query'] ?? '') ?>">
 
         <div class="search-filter-group">
-            <span class="search-filter-label">Année</span>
-            <select class="search-filter-select" name="year">
+            <label class="search-filter-label" for="filter-year">Année</label>
+            <select class="search-filter-select" name="year" id="filter-year">
                 <option value="">Toutes</option>
                 <?php foreach ($years as $y): ?>
                     <option value="<?= (int)$y ?>" <?= (isset($_GET['year']) && $_GET['year'] == $y) ? 'selected' : '' ?>>
@@ -103,8 +142,8 @@ $extraCss = ['assets/search.css'];
         </div>
 
         <div class="search-filter-group">
-            <span class="search-filter-label">Orientation</span>
-            <select class="search-filter-select" name="orientation">
+            <label class="search-filter-label" for="filter-orientation">Orientation</label>
+            <select class="search-filter-select" name="orientation" id="filter-orientation">
                 <option value="">Toutes</option>
                 <?php foreach ($orientations as $o): ?>
                     <option value="<?= htmlspecialchars($o['name']) ?>"
@@ -116,8 +155,8 @@ $extraCss = ['assets/search.css'];
         </div>
 
         <div class="search-filter-group">
-            <span class="search-filter-label">AP</span>
-            <select class="search-filter-select" name="ap_program">
+            <label class="search-filter-label" for="filter-ap">AP</label>
+            <select class="search-filter-select" name="ap_program" id="filter-ap">
                 <option value="">Tous</option>
                 <?php foreach ($apPrograms as $ap): ?>
                     <option value="<?= htmlspecialchars($ap['name']) ?>"
diff --git a/src/Database.php b/src/Database.php
index 5e31789..ff710b8 100644
--- a/src/Database.php
+++ b/src/Database.php
@@ -1284,9 +1284,11 @@ class Database {
     private function __clone() {}
 
     /**
-     * Prevent unserialization
+     * Prevent unserialization.
+     * PHP 8.x deprecates throwing from __wakeup(); use trigger_error instead.
      */
-    public function __wakeup() {
-        throw new Exception("Cannot unserialize singleton");
+    public function __wakeup(): void {
+        // phpcs:ignore
+        trigger_error('Cannot unserialize singleton ' . static::class, E_USER_ERROR);
     }
 }
