/* Transient success confirmations must never reserve document space. */
.site-notification-stack {
    position: fixed;
    top: max(0.75rem, env(safe-area-inset-top));
    left: 50%;
    z-index: 1080;
    display: grid;
    gap: 0.65rem;
    width: min(calc(100vw - 1.5rem), 42rem);
    transform: translateX(-50%);
    pointer-events: none;
}

.site-notification {
    position: relative;
    overflow: hidden;
    padding: 0.8rem 2.85rem 0.8rem 1rem;
    border: 1px solid #a3cfbb;
    border-radius: 0.65rem;
    background: #d1e7dd;
    box-shadow: 0 0.75rem 1.75rem rgba(15, 81, 50, 0.2);
    color: #0f5132;
    pointer-events: auto;
    animation: site-notification-enter 160ms ease-out;
}

.site-notification.is-closing {
    animation: site-notification-leave 160ms ease-in forwards;
}

.site-notification-progress {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    transform-origin: left center;
    background: #198754;
    animation: site-notification-countdown 10s linear forwards;
}

.site-notification-message {
    display: block;
    line-height: 1.35;
}

.site-notification-close {
    position: absolute;
    top: 50%;
    right: 0.7rem;
    transform: translateY(-50%);
}

@keyframes site-notification-countdown {
    from { transform: scaleX(1); }
    to { transform: scaleX(0); }
}

@keyframes site-notification-enter {
    from { opacity: 0; transform: translateY(-0.5rem); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes site-notification-leave {
    from { opacity: 1; transform: translateY(0); }
    to { opacity: 0; transform: translateY(-0.5rem); }
}

@media (prefers-reduced-motion: reduce) {
    .site-notification,
    .site-notification.is-closing,
    .site-notification-progress {
        animation: none;
    }
}