/* Approved static blue field; no continuous motion or pointer effect. */
body { position:relative; isolation:isolate; }
.blue-field { position:fixed; inset:0; z-index:-1; pointer-events:none; overflow:hidden;
  background:radial-gradient(ellipse at 15% 18%,rgba(39,95,131,.28),transparent 58%),
             radial-gradient(ellipse at 88% 80%,rgba(95,58,126,.17),transparent 58%),
             linear-gradient(125deg,#102c50,#12305a 48%,#102846);
}
@media print { .blue-field { display:none; } }