@page { size: A4; margin: 0; }
           body { margin: 0; padding: 0; font-family: 'Times New Roman', serif; }
           .print-preview-container { width: 210mm; min-height: 297mm; padding: 15mm; box-sizing: border-box; background: white; color: #000; font-family: 'Times New Roman', serif; font-size: 18px; line-height: 1.5; position: relative; }
           .header-img { width: 100%; height: auto; display: block; margin: -5mm auto 20px; }
           .order-title { font-weight: bold; font-size: 14pt; text-align: center; margin: 20px 0 30px 0; text-decoration: underline; }
           .order-text { text-align: justify; } .order-text p { margin-bottom: 1em; text-indent: 1.27cm; }
           .order-basis { margin: 30px 0 50px 0; } .order-basis p { margin: 0; }
           .order-signature { margin-top: 100px; text-align: right; font-weight: bold; } .order-signature div { margin-bottom: 10px; }
           .letter-ref { font-size: 12pt;margin-top: 0; text-align: left; width: 35%; font-style: italic; line-height: 1.3; }
           .letter-line { font-weight: bold; font-size: 18px; text-align: left; line-height: 1.2; padding-left: 66%; box-sizing: border-box;}
           .respect-line { text-align: center; font-weight: bold; margin: 20px 0; font-size: 18px; }
           .letter-body { text-align: justify; white-space: pre-wrap; } .letter-body p {font-size: 18px; text-indent: 1.27cm; margin: 0; line-height: 1.4; }
           .letter-closing { text-align: left; font-size: 18px; font-weight: bold; margin-top: 2rem; }
           .signature-line {display: flex; justify-content: space-around; font-weight: bold; font-size: 18px; margin-top: 3rem; text-align: right; }
           .qr-stamp { position: absolute; bottom: 8mm; left: 16mm; display: block; z-index: 10; } .qr-stamp canvas { max-width: 100%; max-height: 100%; }
           .letter-attachment { margin: 1rem 0; font-style: italic; font-size: 18px; }
           .guwahat-title { font-weight: bold; font-size: 22pt; text-align: center; margin: 30px 0; }
           .guwahat-recipient { font-weight: bold; font-size: 16pt; text-align: center; margin: 20px 0; }
           .guwahat-description { text-align: center; font-size: 14pt; margin: 20px 0; }
           .guwahat-signature { margin-top: 80px; text-align: right; font-weight: bold; } .guwahat-signature div { margin-bottom: 10px; }
           .numbering-page-container { width: 210mm; height: 297mm; position: relative; page-break-after: always;}
           .page-number { position: absolute; bottom: 10mm; left: 10mm; color: red; font-size: 12pt;}