diff --git a/src/Core/AbstractRule.php b/src/Core/AbstractRule.php
new file mode 100644
index 0000000..990cbf7
--- /dev/null
+++ b/src/Core/AbstractRule.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace YakNet\AccessibilityConsole\Core;
+
+abstract class AbstractRule
+{
+    /**
+     * @return Violation[]
+     */
+    abstract public function check(\DOMDocument $doc): array;
+
+    /**
+     * Get the WCAG standard ID (e.g., WCAG 2.1 1.1.1)
+     */
+    abstract public function getStandardId(): string;
+
+    /**
+     * Get the severity level (Critical, Major, Minor)
+     */
+    abstract public function getSeverity(): string;
+
+    protected function createViolation(string $message, \DOMElement $element): Violation
+    {
+        return new Violation(
+            message: $message,
+            htmlSnippet: $element->ownerDocument->saveHTML($element),
+            severity: $this->getSeverity(),
+            standard: $this->getStandardId()
+        );
+    }
+}
diff --git a/src/Core/RuleEngine.php b/src/Core/RuleEngine.php
index 13b41d0..4d8c234 100644
--- a/src/Core/RuleEngine.php
+++ b/src/Core/RuleEngine.php
@@ -2,23 +2,26 @@
 
 namespace YakNet\AccessibilityConsole\Core;
 
-use YakNet\AccessibilityConsole\Rules\RuleInterface;
-
 class RuleEngine
 {
-    /** @var RuleInterface[] */
+    /** @var AbstractRule[] */
     private array $rules = [];
 
-    public function addRule(RuleInterface $rule): void
+    public function addRule(AbstractRule $rule): void
     {
         $this->rules[] = $rule;
     }
 
     /**
-     * @return RuleInterface[]
+     * @return Violation[]
      */
-    public function getRules(): array
+    public function run(\DOMDocument $doc): array
     {
-        return $this->rules;
+        $allViolations = [];
+        foreach ($this->rules as $rule) {
+            $violations = $rule->check($doc);
+            $allViolations = array_merge($allViolations, $violations);
+        }
+        return $allViolations;
     }
 }
diff --git a/src/Core/Scanner.php b/src/Core/Scanner.php
index f0d1eb3..ed71214 100644
--- a/src/Core/Scanner.php
+++ b/src/Core/Scanner.php
@@ -2,62 +2,31 @@
 
 namespace YakNet\AccessibilityConsole\Core;
 
-use DOMDocument;
-use YakNet\AccessibilityConsole\Rules\RuleInterface;
-
 class Scanner
 {
-    private array $rules = [];
-
-    public function __construct(
-        private readonly ?RuleEngine $engine = null
-    ) {
-        if ($this->engine) {
-            $this->rules = $this->engine->getRules();
+    public function __construct(private ?RuleEngine $engine = null)
+    {
+        if ($this->engine === null) {
+            $this->engine = new RuleEngine();
         }
     }
 
-    public function addRule(RuleInterface $rule): void
-    {
-        $this->rules[] = $rule;
-    }
-
     /**
+     * Scan HTML content for accessibility violations.
+     *
+     * @param string $html
      * @return Violation[]
      */
     public function scan(string $html): array
     {
-        if (trim($html) === '') {
+        if (empty(trim($html))) {
             return [];
         }
 
-        $dom = new DOMDocument();
-        $previousState = libxml_use_internal_errors(true);
-        $loaded = $dom->loadHTML('<?xml encoding="utf-8" ?>' . $html, LIBXML_NOERROR | LIBXML_NOWARNING);
-        libxml_clear_errors();
-        libxml_use_internal_errors($previousState);
+        $doc = new \DOMDocument();
+        // Suppress warnings for malformed HTML
+        @$doc->loadHTML('<?xml encoding="utf-8" ?>' . $html, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);
 
-        if (!$loaded) {
-            return [];
-        }
-
-        $violations = [];
-        $elements = $dom->getElementsByTagName('*');
-
-        foreach ($elements as $element) {
-            if (!$element instanceof \DOMElement) continue;
-            foreach ($this->rules as $rule) {
-                try {
-                    $violation = $rule->check($element);
-                    if ($violation) {
-                        $violations[] = $violation;
-                    }
-                } catch (\Throwable) {
-                    continue;
-                }
-            }
-        }
-
-        return $violations;
+        return $this->engine->run($doc);
     }
 }
diff --git a/src/Rules/EmptyLinkRule.php b/src/Rules/EmptyLinkRule.php
new file mode 100644
index 0000000..78adaca
--- /dev/null
+++ b/src/Rules/EmptyLinkRule.php
@@ -0,0 +1,27 @@
+<?php
+
+namespace YakNet\AccessibilityConsole\Rules;
+
+use YakNet\AccessibilityConsole\Core\AbstractRule;
+
+class EmptyLinkRule extends AbstractRule
+{
+    public function check(\DOMDocument $doc): array
+    {
+        $violations = [];
+        $links = $doc->getElementsByTagName('a');
+
+        foreach ($links as $link) {
+            if (trim($link->textContent) === '' && !$link->hasAttribute('aria-label')) {
+                $violations[] = $this->createViolation(
+                    "Bağlantı (a) etiketi metin içermiyor ve 'aria-label' tanımlanmamış. Ekran okuyucular bu linkin nereye gittiğini anlayamaz.",
+                    $link
+                );
+            }
+        }
+        return $violations;
+    }
+
+    public function getStandardId(): string { return 'WCAG 2.1 2.4.4'; }
+    public function getSeverity(): string { return 'Critical'; }
+}
diff --git a/src/Rules/HeadingOrderRule.php b/src/Rules/HeadingOrderRule.php
new file mode 100644
index 0000000..678755c
--- /dev/null
+++ b/src/Rules/HeadingOrderRule.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace YakNet\AccessibilityConsole\Rules;
+
+use YakNet\AccessibilityConsole\Core\AbstractRule;
+
+class HeadingOrderRule extends AbstractRule
+{
+    public function check(\DOMDocument $doc): array
+    {
+        $violations = [];
+        $xpath = new \DOMXPath($doc);
+        $headings = $xpath->query('//h1|//h2|//h3|//h4|//h5|//h6');
+        
+        $lastLevel = 0;
+        foreach ($headings as $h) {
+            $level = (int)substr($h->tagName, 1);
+            if ($lastLevel > 0 && $level > $lastLevel + 1) {
+                $violations[] = $this->createViolation(
+                    "Başlık hiyerarşisi bozuk. H{$lastLevel} etiketinden doğrudan H{$level} etiketine geçiş yapılmış. Sıralı olmalıdır.",
+                    $h
+                );
+            }
+            $lastLevel = $level;
+        }
+        return $violations;
+    }
+
+    public function getStandardId(): string { return 'WCAG 2.1 1.3.1'; }
+    public function getSeverity(): string { return 'Major'; }
+}
diff --git a/src/Rules/ImageAltRule.php b/src/Rules/ImageAltRule.php
new file mode 100644
index 0000000..aa4ee37
--- /dev/null
+++ b/src/Rules/ImageAltRule.php
@@ -0,0 +1,27 @@
+<?php
+
+namespace YakNet\AccessibilityConsole\Rules;
+
+use YakNet\AccessibilityConsole\Core\AbstractRule;
+
+class ImageAltRule extends AbstractRule
+{
+    public function check(\DOMDocument $doc): array
+    {
+        $violations = [];
+        $images = $doc->getElementsByTagName('img');
+
+        foreach ($images as $img) {
+            if (!$img->hasAttribute('alt') || trim($img->getAttribute('alt')) === '') {
+                $violations[] = $this->createViolation(
+                    "Görüntü (img) etiketi 'alt' özniteliğine sahip değil veya boş. WCAG 1.1.1 uyarınca her görüntünün bir açıklaması olmalıdır.",
+                    $img
+                );
+            }
+        }
+        return $violations;
+    }
+
+    public function getStandardId(): string { return 'WCAG 2.1 1.1.1'; }
+    public function getSeverity(): string { return 'Critical'; }
+}
diff --git a/src/Rules/StrictRuleSet.php b/src/Rules/StrictRuleSet.php
new file mode 100644
index 0000000..0f87550
--- /dev/null
+++ b/src/Rules/StrictRuleSet.php
@@ -0,0 +1,16 @@
+<?php
+
+namespace YakNet\AccessibilityConsole\Rules;
+
+use YakNet\AccessibilityConsole\Core\RuleEngine;
+
+class StrictRuleSet extends RuleEngine
+{
+    public function __construct()
+    {
+        $this->addRule(new ImageAltRule());
+        $this->addRule(new HeadingOrderRule());
+        $this->addRule(new EmptyLinkRule());
+        // Daha fazla kural buraya eklenebilir
+    }
+}