.payment-processing-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.45);
    z-index: 9999;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    padding: 20px;
}

.payment-processing-overlay.active {
    display: flex;
}

.payment-processing-panel {
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.18);
    padding: 36px 28px 32px;
    max-width: 420px;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.spinner {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    border: 8px solid #e8eef5;
    border-top: 8px solid #0d6efd;
    animation: spin 1s linear infinite;
    margin-bottom: 8px;
}

.processing-text {
    color: #1e293b;
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.4;
    text-align: center;
    font-family: 'Segoe UI', Roboto, Arial, sans-serif;
    margin: 12px 0 0;
    padding: 0;
}

.processing-text-emphasis {
    color: #1d4ed8;
    font-size: 1.05rem;
    font-weight: 700;
    margin-top: 8px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}