body {
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
#certificate-details {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease-in-out;
}
.modal-backdrop {
    background-color: rgba(0, 0, 0, 0.5);
}
@media print {
    @page {
        size: A4 portrait;
    }
    .no-print {
        display: none !important;
    }
    body {
        font-size: 10pt;
        background: #fff !important;
        color: #000 !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }
    .container {
        max-width: 100% !important;
        padding: 0 !important;
        margin: 0 !important;
    }
    main {
        display: block !important;
    }
    .printable-card {
         box-shadow: none !important;
         border: 1px solid #ddd !important;
         border-radius: 0 !important;
         padding: 1rem !important;
         margin-bottom: 1rem;
         page-break-inside: avoid;
    }
    h1, h2, legend { font-size: 14pt !important; }
    #total-cost { font-size: 24pt !important; }
}