.opc-block-summary {
    .anonymous-donation-wrapper {
        margin-top: 20px;
        padding-top: 15px;
        border-top: 1px solid #ccc;
        .donation-text { font-size: 13px; color: #666; margin-bottom: 10px; }
        .donation-button button { width: 100%; }
        .donation-qr { text-align: center; }
        .donation-error { color: #e02b27; font-size: 12px; }
    }
}