@media print {
    @page {
        size: 80mm auto;
        margin: 0;
    }
    body {
        background: white !important;
        font-family: 'Courier New', monospace;
        font-size: 14px;
        width: 80mm;
        margin: 0 auto;
        padding: 0;
        color: black !important;
    }
    * {
        color: black !important;
        background: white !important;
    }
    header, #generateBtn, #resetBtn, #printBtn {
        display: none !important;
    }
    .container h1, .container .selectors {
        display: none !important;
    }
    .receipt {
        border: none !important;
        margin: 0;
        padding: 5mm;
        width: 70mm;
        text-align: center;
        page-break-inside: avoid;
        background: white !important;
        display: block !important;
    }
    .receipt-header {
        font-size: 18px;
        font-weight: bold;
        margin-bottom: 5mm;
        border-bottom: 1px dashed #000;
        padding-bottom: 2mm;
    }
    .receipt-body p {
        margin: 4mm 0;
        font-size: 16px;
        text-align: center;
    }
    .receipt-body hr {
        border: none;
        border-top: 1px dashed #000;
        margin: 5mm 0;
    }
}