.page-transition-overlay {
    position: fixed;
    inset: 0;
    z-index: 2147483000;
    display: grid;
    place-items: center;
    background: rgba(246, 248, 251, 0.72);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 160ms ease, visibility 160ms ease;
    backdrop-filter: blur(6px);
}

.page-transition-overlay.is-active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.page-transition-spinner {
    width: 34px;
    height: 34px;
    border-radius: 999px;
    border: 3px solid #d8e5f4;
    border-top-color: #0f4b92;
    animation: pageTransitionSpin 760ms linear infinite;
}

body.page-entering .app-main,
body.page-entering .login-shell,
body.page-entering main.container {
    animation: pageEnter 220ms ease both;
}

@keyframes pageTransitionSpin {
    to { transform: rotate(360deg); }
}

@keyframes pageEnter {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
    .page-transition-overlay,
    .page-transition-spinner,
    body.page-entering .app-main,
    body.page-entering .login-shell,
    body.page-entering main.container {
        animation: none !important;
        transition: none !important;
    }
}