Improve tab styling and refactor plugin architecture. Make Hosting tab class fully self-contained by internalizing data structures, fix CSS to match reference plugin, and remove duplicate function declarations.

admin/css/seoprostack-admin.css

@@ -48,6 +48,9 @@
     position: sticky;
     top: 32px;
     z-index: 100;
+    display: flex;
+    overflow-x: auto;
+    -webkit-overflow-scrolling: touch;
 }
 
 .nav-tab {
@@ -64,6 +67,9 @@
     border-bottom: 2px solid transparent;
     display: inline-block;
     transition: all 0.2s ease;
+    position: relative;
+    outline: none;
+    box-shadow: none;
 }
 
 .nav-tab:hover,
@@ -83,6 +89,17 @@
     font-weight: 600;
 }
 
+/* Improve tab content container */
+.tab-content {
+    padding: 20px 0;
+    animation: fadeIn 0.3s ease-in-out;
+}
+
+@keyframes fadeIn {
+    from { opacity: 0; }
+    to { opacity: 1; }
+}
+
 /* Base Toggle Switch Component */
 .seoprostack-toggle-switch {
     position: relative;
@@ -871,6 +888,9 @@ input:checked + .seoprostack-toggle-slider:before {
     position: sticky;
     top: 32px;
     z-index: 100;
+    display: flex;
+    overflow-x: auto;
+    -webkit-overflow-scrolling: touch;
 }
 
 .nav-tab {