.wcb-block-notice {
    background: #fef2f2;
    border: 1px solid #fca5a5;
    border-left: 4px solid #ef4444;
    color: #991b1b;
    padding: 12px 16px;
    margin: 0 0 20px;
    border-radius: 4px;
    font-size: 14px;
    display: none;
}

.wcb-block-notice.is-visible {
    display: block;
}