Refactor code structure for improved readability and maintainability

Author: SimYunSup

_includes/footer.html

@@ -47,12 +47,23 @@
     </main>
 
     <!-- Footer -->
-    <footer class="py-8 bg-slate-100 dark:bg-slate-950 border-t border-slate-200 dark:border-slate-800">
-        <div class="container mx-auto px-4 text-center text-slate-500 dark:text-slate-400 text-sm">
-            <p>&copy; @DateTime.Now.Year DotnetDevKr. All rights reserved.</p>
-            <p class="mt-2">
-                <a href="/privacy" class="hover:underline">Privacy Policy</a> &middot;
-                <a href="/coc" class="hover:underline">Code of Conduct</a>
+    <footer class="py-8 bg-slate-800 dark:bg-slate-950 border-t border-slate-700 dark:border-slate-800">
+        <div class="container mx-auto px-4 text-center text-slate-300 dark:text-slate-400 text-sm space-y-3">
+            <p>&copy; 2019-@DateTime.Now.Year 닷넷데브(dotnetdev.kr)</p>
+            <p>
+                이 저작물은 <a href="https://creativecommons.org/licenses/by/4.0/" target="_blank" rel="license" class="text-sky-400 hover:text-white hover:underline transition-colors">CC BY 4.0</a> 라이선스에 따라 이용할 수 있습니다.
+            </p>
+            <p class="space-x-1">
+                <a href="/privacy" class="text-sky-400 hover:text-white hover:underline transition-colors">개인정보처리방침</a> |
+                <a href="/disclosures" class="text-sky-400 hover:text-white hover:underline transition-colors">정보공시</a> |
+                <a href="https://forum.dotnetdev.kr/" target="_blank" class="text-sky-400 hover:text-white hover:underline transition-colors">닷넷데브 포럼</a> |
+                <a href="https://dotnetuniverse.net/" target="_blank" class="text-sky-400 hover:text-white hover:underline transition-colors">닷넷유니버스</a> |
+                <a href="https://www.youtube.com/@@dotnetdevkr" target="_blank" class="text-sky-400 hover:text-white hover:underline transition-colors">닷넷데브 YouTube 채널</a> |
+                <a href="https://www.github.com/dotnetdev-kr" target="_blank" class="text-sky-400 hover:text-white hover:underline transition-colors">닷넷데브 GitHub</a> |
+                <a href="https://www.linkedin.com/company/96143755" target="_blank" class="text-sky-400 hover:text-white hover:underline transition-colors">닷넷데브 LinkedIn</a>
+            </p>
+            <p class="pt-3 border-t border-slate-700 dark:border-slate-800 text-slate-400 text-xs">
+                <a href="mailto:contact@dotnetdev.kr" class="text-sky-400 hover:text-white hover:underline transition-colors">contact@dotnetdev.kr</a> | 사업자등록번호: 504-82-89269 | (06193) 서울특별시 강남구 테헤란로 70길 12, H타워 402호 D220, 닷넷데브
             </p>
         </div>
     </footer>