@media print {
    body * {
        visibility: hidden;
    }

    #receipt-container, #receipt-container * {
        visibility: visible;
    }

    #receipt-container {
        position: absolute;
        left: 0;
        top: 0;
        width: 100%;
        border: 1px solid #ccc;
        padding: 20px;
        margin: 0;
    }
}