:root[data-theme="dark"]{color:#e5e7eb;background:#111827}:root[data-theme="dark"] body{background:#111827}:root[data-theme="dark"] main{color:#e5e7eb}:root[data-theme="dark"] h1,:root[data-theme="dark"] h2,:root[data-theme="dark"] h3{color:#c4b5fd}:root[data-theme="dark"] .card,:root[data-theme="dark"] .entry-form,:root[data-theme="dark"] .table-wrap,:root[data-theme="dark"] .detail{background:#1f2937;color:#e5e7eb}:root[data-theme="dark"] input,:root[data-theme="dark"] select{background:#111827;color:#fff;border-color:#6d28d9}:root[data-theme="dark"] th{background:#312e81;color:#fff}:root[data-theme="dark"] td{border-color:#374151}:root[data-theme="dark"] .muted{color:#cbd5e1}.stock-tag{display:inline-block;margin:.15rem;padding:.3rem .5rem;background:#e0e7ff;color:#3730a3;border-radius:.4rem;font-weight:700}:root[data-theme="dark"] .stock-tag{background:#312e81;color:#ede9fe}

/* ダークモードでは紺色の文字・罫線を明るい色へ置き換え、コントラストを確保する。 */
:root[data-theme="dark"] .entry-form label,:root[data-theme="dark"] .login-card label,:root[data-theme="dark"] .sales-header label,:root[data-theme="dark"] .line-inputs label,:root[data-theme="dark"] #product-search-dialog label,:root[data-theme="dark"] .csv-import label,:root[data-theme="dark"] .backup-form label,:root[data-theme="dark"] .restore-confirm label{color:#ddd6fe}:root[data-theme="dark"] .product-name,:root[data-theme="dark"] .detail dt,:root[data-theme="dark"] td a{color:#c4b5fd}:root[data-theme="dark"] .stock-cell{background:#273449;color:#f1f5f9}:root[data-theme="dark"] .product-search-result{background:#1f2937;color:#e2e8f0;border-color:#a78bfa}:root[data-theme="dark"] .product-search-result:hover{background:#334155}:root[data-theme="dark"] input,:root[data-theme="dark"] select{border-color:#a78bfa}:root[data-theme="dark"] input:focus{outline-color:#93c5fd;border-color:#c4b5fd}:root[data-theme="dark"] th{background:#4c3a8f}:root[data-theme="dark"] td,:root[data-theme="dark"] .detail dt,:root[data-theme="dark"] .detail dd{border-color:#64748b}:root[data-theme="dark"] .secondary{background:#273449;color:#ddd6fe;border-color:#a78bfa}:root[data-theme="dark"] .lookup-message{background:#273449;color:#ddd6fe}