Änderungen design hin zu centern von aller pages vom login

css/login/Changepw.css

@@ -79,21 +79,27 @@
     border: 1px solid gray
 }
 #content_container {
+    position: absolute;
     display: flex;
     justify-content: center;
     align-items: center;
     width: 1024px;
     height: 800px;
-    margin: 0 auto;
-    margin-top: 20px;
+    margin: auto;
+    top: 50%;
+    left: 50%;
+    transform: translate(0, -50%);
 }
 
 .container-fluid {
+    position:absolute;
     width: 400px;
     height: 379px;
     background-color: rgba(255,255,255,0.5);
-    margin: 0 auto;
-    margin-top: 220px;
+    margin: auto;
+    top: 50%;
+    left: 50%;
+    transform: translate(0, -50%);
 }
 
 #tbl_main {