.busy-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.45);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.busy-card {
    background: white;
    padding: 18px 22px;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.25);
    min-width: 260px;
    text-align: center;
    font-size: 1.05rem;
}

.spinner {
    width: 42px;
    height: 42px;
    margin: 0 auto 12px auto;
    border-radius: 50%;
    border: 5px solid #ddd;
    border-top-color: #555;
    animation: spin 0.9s linear infinite;
}

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