/* ===== Loading Overlay ===== */
#loading-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: 9999;
    align-items: center;
    justify-content: center;
}
#loading-overlay.active {
    display: flex;
}
.loading-spinner {
    width: 52px;
    height: 52px;
    border: 6px solid #fff;
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}