style(cms): improve editor ui and implement collapsible item cards

Enhance the CMS administration interface by introducing a more refined design system for content editors. This update replaces generic Bootstrap utility classes with dedicated CMS styling to improve visual hierarchy and usability.
Key changes:
- Introduce `cms-editor-group` and `cms-item-card` classes for consistent grouping and item styling.
- Implement collapsible functionality for item cards to manage long lists of content more effectively.
- Standardize editor buttons, including new styles for drag handles, remove buttons, and add buttons.
- Update the fixed bottom action bar with improved backdrop filters, shadows, and spacing.
- Refactor editor scripts across Accreditation, Admissions, History, Partnerships, and Policies to utilize the new UI components and collapse logic.
- Add comprehensive CSS to `main.ejs` to support the new CMS design tokens and layout behaviors.

views/layouts/main.ejs

@@ -283,18 +283,22 @@
 
     .fixed-bottom-buttons {
       position: fixed;
-      bottom: 0;
+      left: 0;
       right: 0;
-      padding: 1rem;
+      bottom: 0;
+      padding: 0.875rem 1.5rem;
       z-index: 1000;
-      width: 25%;
       display: flex;
       justify-content: flex-end;
-      gap: 0.5rem;
+      gap: 0.75rem;
+      background: rgba(255, 255, 255, 0.96);
+      border-top: 1px solid rgba(15, 23, 42, 0.08);
+      box-shadow: 0 -4px 6px -1px rgba(0, 0, 0, 0.08);
+      backdrop-filter: blur(8px);
     }
 
     .fixed-bottom-buttons .btn {
-      min-width: 120px;
+      min-width: 136px;
       display: inline-flex;
       align-items: center;
       justify-content: center;
@@ -303,7 +307,174 @@
 
     /* Add padding to prevent content from being hidden behind fixed buttons */
     .content-with-fixed-buttons {
-      padding-bottom: 80px;
+      padding-bottom: 110px;
+    }
+
+    .content-with-fixed-buttons .card {
+      border: 1px solid rgba(148, 163, 184, 0.16) !important;
+      box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04), 0 8px 24px rgba(15, 23, 42, 0.04) !important;
+    }
+
+    .content-with-fixed-buttons .card-header {
+      background: #fff;
+      border-bottom: 1px solid rgba(148, 163, 184, 0.14);
+      padding: 0.875rem 1rem;
+    }
+
+    .content-with-fixed-buttons .card-body {
+      padding: 1rem;
+    }
+
+    .content-with-fixed-buttons .form-control,
+    .content-with-fixed-buttons .form-select {
+      background: #fff;
+      border: 1px solid rgba(148, 163, 184, 0.18);
+      box-shadow: none;
+    }
+
+    .content-with-fixed-buttons .form-control:focus,
+    .content-with-fixed-buttons .form-select:focus {
+      border-color: rgba(184, 183, 106, 0.55);
+      box-shadow: 0 0 0 0.2rem rgba(184, 183, 106, 0.12);
+    }
+
+    .content-with-fixed-buttons .form-text {
+      color: #94a3b8;
+      font-size: 0.75rem;
+      margin-top: 0.4rem;
+    }
+
+    .content-with-fixed-buttons .card-header-tabs {
+      margin-bottom: -0.875rem;
+    }
+
+    .content-with-fixed-buttons .nav-tabs {
+      border-bottom: 0;
+      gap: 0.25rem;
+    }
+
+    .content-with-fixed-buttons .nav-tabs .nav-link {
+      border: 0;
+      border-radius: 8px 8px 0 0;
+      color: #64748b;
+      padding: 0.75rem 0.95rem;
+    }
+
+    .content-with-fixed-buttons .nav-tabs .nav-link.active {
+      color: #0f172a;
+      background: rgba(248, 250, 252, 0.96);
+      box-shadow: inset 0 -2px 0 var(--primary-color);
+    }
+
+    .cms-editor-group {
+      background: #f8fafc;
+      border: 1px solid rgba(148, 163, 184, 0.12);
+      border-radius: 12px;
+      padding: 1rem;
+    }
+
+    .cms-item-card {
+      background: #f8fafc;
+      border: 1px solid rgba(148, 163, 184, 0.12) !important;
+      border-radius: 12px;
+      box-shadow: none !important;
+    }
+
+    .cms-item-card .card-header {
+      background: transparent;
+      border-bottom: 1px solid rgba(148, 163, 184, 0.1);
+      padding: 0.75rem 0.875rem;
+    }
+
+    .cms-item-card .card-body {
+      background: transparent;
+      padding: 0.875rem;
+    }
+
+    .cms-item-card.is-collapsed .card-body {
+      display: none;
+    }
+
+    .cms-item-card .drag-handle {
+      background: transparent;
+      border: 0;
+      color: #94a3b8;
+      padding: 0.25rem 0.375rem;
+      box-shadow: none;
+    }
+
+    .cms-item-card .drag-handle:hover {
+      color: #475569;
+      background: rgba(255, 255, 255, 0.75);
+    }
+
+    .cms-collapse-toggle {
+      display: inline-flex;
+      align-items: center;
+      justify-content: center;
+      width: 30px;
+      height: 30px;
+      border: 0;
+      background: transparent;
+      color: #94a3b8;
+      border-radius: 999px;
+    }
+
+    .cms-collapse-toggle:hover {
+      background: rgba(148, 163, 184, 0.12);
+      color: #475569;
+    }
+
+    .cms-collapse-toggle i {
+      transition: transform 0.18s ease;
+    }
+
+    .cms-item-card.is-collapsed .cms-collapse-toggle i {
+      transform: rotate(-90deg);
+    }
+
+    .cms-remove-button {
+      border: 0;
+      background: transparent;
+      color: #94a3b8;
+      padding: 0.25rem;
+      box-shadow: none;
+    }
+
+    .cms-remove-button:hover {
+      color: #ef4444;
+      background: transparent;
+    }
+
+    .cms-add-button {
+      width: 100%;
+      border: 1px dashed rgba(148, 163, 184, 0.55);
+      border-radius: 10px;
+      background: rgba(255, 255, 255, 0.7);
+      color: #475569;
+      padding: 0.8rem 1rem;
+      font-weight: 600;
+    }
+
+    .cms-add-button:hover {
+      background: #fff;
+      border-color: rgba(184, 183, 106, 0.65);
+      color: var(--primary-dark);
+    }
+
+    .field-meta-row {
+      display: flex;
+      justify-content: space-between;
+      align-items: flex-start;
+      gap: 0.75rem;
+      margin-top: 0.35rem;
+    }
+
+    .field-char-count {
+      color: #94a3b8;
+      font-size: 0.75rem;
+      white-space: nowrap;
+      margin-left: auto;
     }
 
     main {