style: Update Customer Portal styles to SkyNest Blue Theme with improved color gradients and button styles

Author: Ifaz-Ikram

src/pages/CustomerPortal.css

@@ -1,8 +1,8 @@
-/* Customer Portal Styles */
+/* Customer Portal Styles - SkyNest Blue Theme */
 
 .customer-portal {
   min-height: 100vh;
-  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+  background: linear-gradient(135deg, #1a237e 0%, #0d47a1 100%);
   padding-bottom: 50px;
 }
 
@@ -11,7 +11,7 @@
   display: flex;
   justify-content: center;
   align-items: center;
-  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+  background: linear-gradient(135deg, #1a237e 0%, #0d47a1 100%);
   color: white;
 }
 
@@ -81,24 +81,24 @@
 
 .booking-card .form-control:focus,
 .booking-card .form-select:focus {
-  border-color: #667eea;
-  box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
+  border-color: #1976d2;
+  box-shadow: 0 0 0 0.2rem rgba(25, 118, 210, 0.25);
 }
 
 .booking-card .btn-primary {
-  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+  background: linear-gradient(135deg, #1a237e 0%, #0d47a1 100%);
   border: none;
   border-radius: 50px;
   padding: 14px 40px;
   font-weight: 600;
   letter-spacing: 0.5px;
   transition: all 0.3s ease;
-  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
+  box-shadow: 0 4px 15px rgba(26, 35, 126, 0.4);
 }
 
 .booking-card .btn-primary:hover {
   transform: translateY(-2px);
-  box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
+  box-shadow: 0 6px 20px rgba(25, 118, 210, 0.5);
 }
 
 .booking-card .btn-primary:active {
@@ -132,9 +132,9 @@
 .alert-info {
   border-radius: 15px;
   border: none;
-  background: rgba(13, 202, 240, 0.15);
-  color: #055160;
-  border-left: 4px solid #0dcaf0;
+  background: rgba(25, 118, 210, 0.15);
+  color: #0d47a1;
+  border-left: 4px solid #1976d2;
 }
 
 .alert-success {