added vehicle creation functionality

frontend/src/components/Main.css

@@ -51,56 +51,6 @@
     border-color: #667eea;
 }
 
-/* New vehicle form */
-.vehicle-new-form {
-    padding: 10px 12px;
-    border-bottom: 1px solid #e0e0e0;
-    background: #f0f0ff;
-}
-
-.vehicle-new-form input {
-    width: 100%;
-    padding: 7px 10px;
-    border: 1px solid #ccc;
-    border-radius: 4px;
-    font-size: 13px;
-    box-sizing: border-box;
-    margin-bottom: 6px;
-}
-
-.vehicle-new-form input:focus {
-    outline: none;
-    border-color: #667eea;
-}
-
-.vehicle-new-actions {
-    display: flex;
-    gap: 6px;
-}
-
-.vehicle-new-actions button {
-    flex: 1;
-    padding: 5px 10px;
-    border-radius: 4px;
-    font-size: 12px;
-    font-weight: 500;
-    cursor: pointer;
-    border: 1px solid #ccc;
-    background: white;
-    color: #333;
-    transition: background 0.2s;
-}
-
-.vehicle-new-actions button:first-child {
-    background: #667eea;
-    color: white;
-    border-color: #667eea;
-}
-
-.vehicle-new-actions button:first-child:hover {
-    background: #5568d3;
-}
-
 /* Vehicle list */
 .vehicle-list {
     flex: 1;
@@ -367,6 +317,41 @@
     cursor: not-allowed;
 }
 
+/* Vehicle form sections */
+.vehicle-form-section {
+    margin-bottom: 20px;
+}
+
+.vehicle-form-actions {
+    display: flex;
+    gap: 10px;
+    margin-top: 20px;
+    padding-top: 16px;
+    border-top: 1px solid #e0e0e0;
+}
+
+.vehicle-form-cancel {
+    padding: 8px 20px;
+    background: white;
+    color: #666;
+    border: 1px solid #ddd;
+    border-radius: 6px;
+    font-size: 13px;
+    font-weight: 600;
+    cursor: pointer;
+    transition: background 0.2s, border-color 0.2s;
+}
+
+.vehicle-form-cancel:hover:not(:disabled) {
+    background: #f5f5f5;
+    border-color: #ccc;
+}
+
+.vehicle-form-cancel:disabled {
+    opacity: 0.5;
+    cursor: not-allowed;
+}
+
 /* Responsive */
 @media (max-width: 768px) {
     .main {