/* Fondo animado de la pantalla de login (Sistema OSGO).
   Vive detrás de la tarjeta blanca del formulario; no toca su layout. */

.osgo-login-bg {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    background: linear-gradient(160deg, #0b2f6b 0%, #123b82 45%, #0a2456 100%);
}

.osgo-login-bg__glow {
    position: absolute;
    top: 8%;
    left: 50%;
    width: 32rem;
    height: 32rem;
    transform: translateX(-50%);
    border-radius: 9999px;
    background: radial-gradient(circle, rgba(255, 191, 71, 0.16) 0%, rgba(255, 191, 71, 0) 70%);
    animation: osgo-glow-pulse 5s ease-in-out infinite;
}

.osgo-login-bg__icon {
    position: absolute;
    color: #eef4ff;
    opacity: 0.16;
    animation: osgo-float 7s ease-in-out infinite;
}

.osgo-login-bg__icon svg {
    width: 100%;
    height: 100%;
}

@keyframes osgo-float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-16px) rotate(2deg); }
}

@keyframes osgo-glow-pulse {
    0%, 100% { opacity: 0.7; transform: translateX(-50%) scale(1); }
    50% { opacity: 1; transform: translateX(-50%) scale(1.08); }
}

@media (prefers-reduced-motion: reduce) {
    .osgo-login-bg__icon,
    .osgo-login-bg__glow {
        animation: none;
    }
}