ADD:

- Added a css file for standart css
- Added a css file for Header and Footer and php file for updating after login is sucessfull
- Added a css file for the Main Content
- Added a css file for SingUP page and PHP file for handling Singin
- Added a css file for Dashboard page and PHP for the dynamic page solution
- Added a css file for 404 page
- Added a css file for Login page and PHP file for handling Login
- Added a css file for Terms and Privacy page
- Added a css file for Prices content

js/header_and_footer.js

@@ -0,0 +1,8 @@
+function toggleDiv() {
+  var div = document.getElementById("background_ambuigue");
+  if (div.style.display === "flex") {
+    div.style.display = "none";
+  } else {
+    div.style.display = "flex";
+  }
+}