.middleware-processing-dialog {
    box-sizing: border-box;
    width: min(30rem, calc(100vw - 2rem));
    max-height: calc(100dvh - 2rem);
    padding: 2rem;
    border: 1px solid #b9d8d4;
    border-radius: 1rem;
    background: #fff;
    color: #18312f;
    text-align: center;
    box-shadow: 0 1rem 4rem #102a2940;
}
.middleware-processing-dialog::backdrop { background: #102a2980; }
.middleware-processing-dialog h2 { margin: 1rem 0 .75rem; font-size: 1.35rem; }
.middleware-processing-dialog h2:focus { outline: none; }
.middleware-processing-dialog p { line-height: 1.6; }
.middleware-processing-spinner {
    display: inline-block;
    width: 2.75rem;
    height: 2.75rem;
    border: .3rem solid #d7eeeb;
    border-top-color: #087e75;
    border-radius: 50%;
    animation: middleware-processing-spin .8s linear infinite;
}
@keyframes middleware-processing-spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .middleware-processing-spinner { animation: none; } }
@media print { .middleware-processing-dialog { display: none !important; } }