diff --git a/Userland/Libraries/LibWeb/CSS/CSSImportRule.h b/Userland/Libraries/LibWeb/CSS/CSSImportRule.h
index bff07f2acb..f633701037 100644
--- a/Userland/Libraries/LibWeb/CSS/CSSImportRule.h
+++ b/Userland/Libraries/LibWeb/CSS/CSSImportRule.h
@@ -8,6 +8,7 @@
 
 #include <AK/URL.h>
 #include <LibWeb/CSS/CSSRule.h>
+#include <LibWeb/CSS/CSSStyleSheet.h>
 
 namespace Web::CSS {
 
diff --git a/Userland/Libraries/LibWeb/CSS/CSSStyleSheet.cpp b/Userland/Libraries/LibWeb/CSS/CSSStyleSheet.cpp
index b85bbe13ab..d4a3dcf065 100644
--- a/Userland/Libraries/LibWeb/CSS/CSSStyleSheet.cpp
+++ b/Userland/Libraries/LibWeb/CSS/CSSStyleSheet.cpp
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
+#include <LibWeb/CSS/CSSImportRule.h>
 #include <LibWeb/CSS/CSSStyleSheet.h>
 #include <LibWeb/CSS/Parser/Parser.h>
 #include <LibWeb/DOM/ExceptionOr.h>
@@ -57,4 +58,34 @@ DOM::ExceptionOr<void> CSSStyleSheet::remove_rule(unsigned index)
     return delete_rule(index);
 }
 
+void CSSStyleSheet::for_each_effective_style_rule(Function<void(CSSStyleRule const&)> const& callback) const
+{
+    for (auto& rule : *m_rules)
+        if (rule.type() == CSSRule::Type::Style) {
+            callback(verify_cast<CSSStyleRule>(rule));
+        } else if (rule.type() == CSSRule::Type::Import) {
+            const auto& import_rule = verify_cast<CSSImportRule>(rule);
+            if (import_rule.has_import_result())
+                import_rule.loaded_style_sheet()->for_each_effective_style_rule(callback);
+        }
+}
+
+bool CSSStyleSheet::for_first_not_loaded_import_rule(Function<void(CSSImportRule&)> const& callback)
+{
+    for (auto& rule : *m_rules)
+        if (rule.type() == CSSRule::Type::Import) {
+            auto& import_rule = verify_cast<CSSImportRule>(rule);
+            if (!import_rule.has_import_result()) {
+                callback(import_rule);
+                return true;
+            }
+
+            if (import_rule.loaded_style_sheet()->for_first_not_loaded_import_rule(callback)) {
+                return true;
+            }
+        }
+
+    return false;
+}
+
 }
diff --git a/Userland/Libraries/LibWeb/CSS/CSSStyleSheet.h b/Userland/Libraries/LibWeb/CSS/CSSStyleSheet.h
index 0528ffb49a..576ee76fa0 100644
--- a/Userland/Libraries/LibWeb/CSS/CSSStyleSheet.h
+++ b/Userland/Libraries/LibWeb/CSS/CSSStyleSheet.h
@@ -6,16 +6,19 @@
 
 #pragma once
 
+#include <AK/Function.h>
 #include <AK/NonnullRefPtrVector.h>
 #include <AK/TypeCasts.h>
-#include <LibWeb/CSS/CSSImportRule.h>
 #include <LibWeb/CSS/CSSRule.h>
 #include <LibWeb/CSS/CSSRuleList.h>
+#include <LibWeb/CSS/CSSStyleRule.h>
 #include <LibWeb/CSS/StyleSheet.h>
 #include <LibWeb/Loader/Resource.h>
 
 namespace Web::CSS {
 
+class CSSImportRule;
+
 class CSSStyleSheet final : public StyleSheet {
 public:
     using WrapperType = Bindings::CSSStyleSheetWrapper;
@@ -42,37 +45,8 @@ public:
     DOM::ExceptionOr<void> remove_rule(unsigned index);
     DOM::ExceptionOr<void> delete_rule(unsigned index);
 
-    template<typename Callback>
-    void for_each_effective_style_rule(Callback callback) const
-    {
-        for (auto& rule : *m_rules)
-            if (rule.type() == CSSRule::Type::Style) {
-                callback(verify_cast<CSSStyleRule>(rule));
-            } else if (rule.type() == CSSRule::Type::Import) {
-                const auto& import_rule = verify_cast<CSSImportRule>(rule);
-                if (import_rule.has_import_result())
-                    import_rule.loaded_style_sheet()->for_each_effective_style_rule(callback);
-            }
-    }
-
-    template<typename Callback>
-    bool for_first_not_loaded_import_rule(Callback callback)
-    {
-        for (auto& rule : *m_rules)
-            if (rule.type() == CSSRule::Type::Import) {
-                auto& import_rule = verify_cast<CSSImportRule>(rule);
-                if (!import_rule.has_import_result()) {
-                    callback(import_rule);
-                    return true;
-                }
-
-                if (import_rule.loaded_style_sheet()->for_first_not_loaded_import_rule(callback)) {
-                    return true;
-                }
-            }
-
-        return false;
-    }
+    void for_each_effective_style_rule(Function<void(CSSStyleRule const&)> const& callback) const;
+    bool for_first_not_loaded_import_rule(Function<void(CSSImportRule&)> const& callback);
 
 private:
     explicit CSSStyleSheet(NonnullRefPtrVector<CSSRule>);
diff --git a/Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp b/Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp
index 1ef678fd5d..cebf6816e3 100644
--- a/Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp
+++ b/Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp
@@ -11,6 +11,7 @@
 #include <AK/Debug.h>
 #include <AK/NonnullRefPtrVector.h>
 #include <AK/SourceLocation.h>
+#include <LibWeb/CSS/CSSImportRule.h>
 #include <LibWeb/CSS/CSSMediaRule.h>
 #include <LibWeb/CSS/CSSStyleDeclaration.h>
 #include <LibWeb/CSS/CSSStyleRule.h>
diff --git a/Userland/Libraries/LibWeb/CSS/StyleComputer.cpp b/Userland/Libraries/LibWeb/CSS/StyleComputer.cpp
index 994915fcb4..eb3ca4eafd 100644
--- a/Userland/Libraries/LibWeb/CSS/StyleComputer.cpp
+++ b/Userland/Libraries/LibWeb/CSS/StyleComputer.cpp
@@ -77,7 +77,7 @@ Vector<MatchingRule> StyleComputer::collect_matching_rules(DOM::Element const& e
     size_t style_sheet_index = 0;
     for_each_stylesheet(declaration_type, [&](auto& sheet) {
         size_t rule_index = 0;
-        static_cast<CSSStyleSheet const&>(sheet).for_each_effective_style_rule([&](auto& rule) {
+        static_cast<CSSStyleSheet const&>(sheet).for_each_effective_style_rule([&](auto const& rule) {
             size_t selector_index = 0;
             for (auto& selector : rule.selectors()) {
                 if (SelectorEngine::matches(selector, element)) {
diff --git a/Userland/Libraries/LibWeb/Loader/CSSLoader.cpp b/Userland/Libraries/LibWeb/Loader/CSSLoader.cpp
index 418ae70276..89a56d48da 100644
--- a/Userland/Libraries/LibWeb/Loader/CSSLoader.cpp
+++ b/Userland/Libraries/LibWeb/Loader/CSSLoader.cpp
@@ -6,6 +6,7 @@
 
 #include <AK/Debug.h>
 #include <AK/URL.h>
+#include <LibWeb/CSS/CSSImportRule.h>
 #include <LibWeb/CSS/Parser/Parser.h>
 #include <LibWeb/DOM/Document.h>
 #include <LibWeb/DOM/Element.h>