diff --git a/api-docs.php b/api-docs.php
index 1185491..d38e814 100644
--- a/api-docs.php
+++ b/api-docs.php
@@ -373,7 +373,7 @@ $phpExample = str_replace('{{BASE_URL}}', $baseUrl, $phpTemplate);
 
         <footer>
             <p>🛡️ Zero-Knowledge Architecture • Server cannot read your data</p>
-            <p class="footer-subtitle"></p>
+            <p class="footer-subtitle">API docs styled to match the main app.</p>
             <div class="footer-links">
                 <a href="<?= h($homeUrl) ?>" title="Main app" aria-label="Main app">
                     <svg width="18" height="18" fill="currentColor" viewBox="0 0 24 24"><path d="M12 3 3 9v12h18V9l-9-6Zm0 2.2 7 4.67V19h-4v-5H9v5H5V9.87l7-4.67Z"/></svg>
diff --git a/index.php b/index.php
index 54b0b6f..9a7c0cb 100644
--- a/index.php
+++ b/index.php
@@ -144,7 +144,7 @@ function normalizeRoutePath(string $path): string
     }
 
     $path = preg_replace('#/+#', '/', $path) ?: '/';
-    if ($path !== '/' && str_ends_with($path, '/')) {
+    if ($path !== '/' && routePathEndsWith($path, '/')) {
         $path = rtrim($path, '/');
         $path = $path === '' ? '/' : $path;
     }
@@ -152,6 +152,20 @@ function normalizeRoutePath(string $path): string
     return $path;
 }
 
+function routePathEndsWith(string $haystack, string $needle): bool
+{
+    if ($needle === '') {
+        return true;
+    }
+
+    $needleLength = strlen($needle);
+    if ($needleLength > strlen($haystack)) {
+        return false;
+    }
+
+    return substr($haystack, -$needleLength) === $needle;
+}
+
 function sendCorsHeaders(): void
 {
     header('Access-Control-Allow-Origin: *');