Minor Refinements to Colours

frontend/src/devices/DeviceDetail.jsx

@@ -135,14 +135,14 @@ export default function DeviceDetail() {
             <button
               onClick={() => navigate(`/devices/${id}/edit`)}
               className="px-4 py-2 text-sm rounded-md transition-colors"
-              style={{ backgroundColor: "var(--btn-primary)", color: "var(--text-heading)" }}
+              style={{ backgroundColor: "var(--text-link)", color: "var(--text-white)" }}
             >
               Edit
             </button>
             <button
               onClick={() => setShowDelete(true)}
               className="px-4 py-2 text-sm rounded-md transition-colors"
-              style={{ backgroundColor: "var(--danger-btn)", color: "#fff" }}
+              style={{ backgroundColor: "var(--danger)", color: "var(--text-white)" }}
             >
               Delete
             </button>