.sinttoniza-shipping-product-message,
.sinttoniza-shipping-notice {
    background: #f3f3f3;
    border-left: 3px solid #111;
    color: #171717;
    font-size: 14px;
    line-height: 1.5;
    margin: 14px 0 18px;
    padding: 12px 14px;
}

.sinttoniza-shipping-notice {
    font-weight: 600;
}

@media (max-width: 767px) {
    .sinttoniza-shipping-product-message,
    .sinttoniza-shipping-notice {
        font-size: 13px;
        margin: 12px 0 16px;
        padding: 11px 12px;
    }
}