/* =========================================================================
   Invoice / document styling — used for on-screen preview AND print/PDF.
   A4 page, professional layout, retail watermark, GST 3-copy support.
   ========================================================================= */

.doc-viewport { background: #55585f; padding: 24px; display: flex; flex-direction: column; align-items: center; gap: 24px; }

/* A4 sheet: 210 x 297 mm */
.a4 {
  width: 210mm; min-height: 297mm; background: #fff; color: #1a1a1a;
  padding: 12mm 12mm; position: relative; box-shadow: 0 6px 30px rgba(0,0,0,.35);
  font-family: "Inter", "Segoe UI", sans-serif; font-size: 11px; line-height: 1.45;
  page-break-after: always; overflow: hidden;
}
.a4:last-child { page-break-after: auto; }

/* ---- Watermark (retail bills only) ---- */
.a4 .watermark {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  pointer-events: none; z-index: 0;
}
.a4 .watermark img { width: 62%; max-height: 62%; object-fit: contain; opacity: .07; filter: grayscale(1); }
.a4 .watermark .wm-text { font-size: 72px; font-weight: 800; color: #000; opacity: .05; transform: rotate(-22deg); letter-spacing: 4px; text-align: center; }
.a4 > .doc-inner { position: relative; z-index: 1; }

/* ---- Copy label (GST original/duplicate/triplicate) ---- */
.copy-label { position: absolute; top: 8mm; right: 12mm; font-size: 10px; font-weight: 700; color: #444; border: 1px solid #888; padding: 2px 9px; border-radius: 4px; text-transform: uppercase; letter-spacing: .04em; z-index: 2; }

/* ---- Header ---- */
.inv-head { display: flex; gap: 14px; align-items: flex-start; border-bottom: 2px solid #222; padding-bottom: 10px; }
.inv-head .logo-box { width: 74px; height: 74px; flex-shrink: 0; display: grid; place-items: center; }
.inv-head .logo-box img { max-width: 74px; max-height: 74px; object-fit: contain; }
.inv-head .logo-fallback { width: 66px; height: 66px; border-radius: 12px; background: linear-gradient(135deg,#2563eb,#7c3aed); color: #fff; display: grid; place-items: center; font-size: 26px; font-weight: 800; }
.inv-head .co { flex: 1; }
.inv-head .co h1 { font-size: 21px; font-weight: 800; letter-spacing: -.01em; color: #111; }
.inv-head .co .co-line { font-size: 10.5px; color: #333; }
.inv-head .co .co-reg { font-size: 10.5px; margin-top: 3px; }
.inv-head .co .co-reg b { color: #111; }
.inv-head .doc-title { text-align: right; }
.inv-head .doc-title .tt { font-size: 16px; font-weight: 800; text-transform: uppercase; letter-spacing: .04em; color: #111; }
.inv-head .doc-title .st { font-size: 10px; color: #555; }

/* ---- Meta / parties ---- */
.inv-meta { display: grid; grid-template-columns: 1fr 1fr; gap: 0; border: 1px solid #cfcfcf; margin-top: 10px; }
.inv-meta .cell { padding: 7px 10px; border-right: 1px solid #e2e2e2; }
.inv-meta .cell:last-child { border-right: none; }
.inv-meta .cell.span2 { grid-column: span 2; border-right: none; border-top: 1px solid #e2e2e2; }
.inv-meta .lbl { font-size: 9px; text-transform: uppercase; letter-spacing: .05em; color: #777; font-weight: 700; }
.inv-meta .val { font-size: 11px; color: #111; }
.inv-meta .party-name { font-weight: 700; font-size: 12px; }

.parties { display: grid; grid-template-columns: 1fr 1fr; margin-top: 10px; border: 1px solid #cfcfcf; }
.parties .p-col { padding: 8px 10px; }
.parties .p-col + .p-col { border-left: 1px solid #e2e2e2; }
.parties .p-title { font-size: 9px; text-transform: uppercase; letter-spacing: .05em; color: #777; font-weight: 700; margin-bottom: 3px; }
.parties .p-name { font-weight: 700; font-size: 12.5px; }
.parties .p-line { font-size: 10.5px; color: #333; }

/* ---- Items table ---- */
table.inv-items { width: 100%; border-collapse: collapse; margin-top: 10px; font-size: 10.5px; }
table.inv-items th, table.inv-items td { border: 1px solid #cfcfcf; padding: 5px 7px; }
table.inv-items thead th { background: #f0f2f6; font-size: 9px; text-transform: uppercase; letter-spacing: .03em; color: #333; text-align: center; }
table.inv-items td.r, table.inv-items th.r { text-align: right; font-variant-numeric: tabular-nums; }
table.inv-items td.c { text-align: center; }
table.inv-items tbody td { color: #222; }
table.inv-items .desc { font-weight: 600; }
table.inv-items .note { font-size: 9px; color: #666; }

/* ---- Totals + tax summary ---- */
.inv-bottom { display: grid; grid-template-columns: 1.3fr 1fr; gap: 12px; margin-top: 10px; }
.tax-summary { border: 1px solid #cfcfcf; border-collapse: collapse; width: 100%; font-size: 9.5px; }
.tax-summary th, .tax-summary td { border: 1px solid #cfcfcf; padding: 4px 6px; text-align: right; }
.tax-summary th { background: #f0f2f6; text-align: center; }
.totals-box { border: 1px solid #cfcfcf; }
.totals-box .trow { display: flex; justify-content: space-between; padding: 5px 12px; font-size: 11px; border-bottom: 1px solid #eee; }
.totals-box .trow .k { color: #444; }
.totals-box .trow.grand { background: #111; color: #fff; font-weight: 800; font-size: 14px; padding: 8px 12px; border-bottom: none; }
.totals-box .trow.grand .k { color: #fff; }

.amt-words { border: 1px solid #cfcfcf; padding: 6px 10px; margin-top: 8px; font-size: 10.5px; }
.amt-words b { text-transform: uppercase; }

/* ---- Footer ---- */
.inv-foot { display: grid; grid-template-columns: 1.4fr 1fr; gap: 12px; margin-top: 12px; }
.inv-foot .bank-decl { font-size: 10px; }
.inv-foot .bank-decl .blk { border: 1px solid #cfcfcf; padding: 7px 10px; margin-bottom: 8px; }
.inv-foot .bank-decl .blk .h { font-weight: 700; font-size: 9px; text-transform: uppercase; color: #777; margin-bottom: 3px; }
.inv-foot .sign-area { text-align: center; border: 1px solid #cfcfcf; padding: 8px; display: flex; flex-direction: column; }
.inv-foot .sign-area .for { font-weight: 700; font-size: 11px; }
.inv-foot .sign-area .sign-img { height: 54px; margin: 6px auto; display: grid; place-items: center; }
.inv-foot .sign-area .sign-img img { max-height: 54px; }
.inv-foot .sign-area .sign-line { border-top: 1px solid #999; margin-top: auto; padding-top: 4px; font-size: 10px; }
.inv-foot .codes { display: flex; gap: 10px; align-items: center; justify-content: center; margin-top: 6px; }
.inv-foot .codes img, .inv-foot .codes canvas, .inv-foot .codes svg { height: 66px; }
.stamp-img { position: absolute; opacity: .85; max-width: 96px; max-height: 96px; }

.thanks { text-align: center; font-size: 11px; margin-top: 10px; color: #333; font-weight: 600; }
.terms { font-size: 9px; color: #666; margin-top: 6px; border-top: 1px dashed #ccc; padding-top: 5px; }

/* Retail-specific compactness */
.a4.retail { font-size: 11.5px; }
.a4.retail table.inv-items th, .a4.retail table.inv-items td { padding: 6px 8px; }

/* ---- Print ---- */
@media print {
  body * { visibility: hidden; }
  #print-root, #print-root * { visibility: visible; }
  #print-root { position: absolute; inset: 0; }
  .doc-viewport { background: #fff; padding: 0; gap: 0; }
  .a4 { box-shadow: none; margin: 0; width: 210mm; min-height: 297mm; }
  @page { size: A4; margin: 0; }
  .no-print { display: none !important; }
}