* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: #f3f4f6;
  color: #111;
  font-family: Tahoma, Arial, sans-serif;
  direction: rtl;
}

a {
  color: inherit;
}

.app-shell {
  max-width: 1180px;
  margin: 24px auto;
  padding: 0 16px;
}

.card {
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 14px;
  padding: 18px;
  box-shadow: 0 12px 30px rgba(0,0,0,.05);
  margin-bottom: 16px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 12px;
}

.form-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 12px;
}

label {
  display: block;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 5px;
}

input,
textarea,
select {
  width: 100%;
  border: 1px solid #cfcfcf;
  border-radius: 9px;
  padding: 10px 11px;
  font: inherit;
  background: #fff;
}

textarea {
  min-height: 72px;
  resize: vertical;
}

button,
.btn {
  border: 0;
  background: #111;
  color: #fff;
  border-radius: 10px;
  padding: 10px 16px;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  font-weight: 700;
}

.btn-light {
  background: #e5e7eb;
  color: #111;
}

.btn-danger {
  background: #b91c1c;
}

.items-editor {
  width: 100%;
  border-collapse: collapse;
  margin-top: 10px;
}

.items-editor th,
.items-editor td {
  border: 1px solid #ddd;
  padding: 8px;
  vertical-align: top;
}

.items-editor th {
  background: #f1f1f1;
}

.actions-bar {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
  margin-top: 14px;
}

.invoice-page {
  width: 210mm;
  min-height: 297mm;
  background: #fff;
  margin: 20px auto;
  padding: 14mm 13mm;
  position: relative;
  box-shadow: 0 12px 35px rgba(0,0,0,.12);
  color: #000;
}

.invoice-top {
  direction: ltr;
  display: grid;
  grid-template-columns: 180px 1fr 180px;
  align-items: start;
  min-height: 165px;
}

.qr-block {
  grid-column: 1;
  direction: rtl;
  text-align: right;
}

.qr-title {
  font-size: 30px;
  font-weight: 900;
  margin: 0 0 12px;
}

#qrcode {
  width: 142px;
  height: 142px;
}

#qrcode img,
#qrcode canvas {
  width: 142px !important;
  height: 142px !important;
}

.seller-block {
  grid-column: 2;
  direction: rtl;
  text-align: center;
  line-height: 1.55;
  font-size: 16px;
}

.seller-name {
  font-weight: 900;
  font-size: 18px;
}

.logo-block {
  grid-column: 3;
  text-align: left;
}

.logo-block img {
  width: 150px;
  max-height: 120px;
  object-fit: contain;
}

.invoice-line {
  border: 0;
  border-top: 4px double #000;
  margin: 18px 0 34px;
}

.invoice-meta {
  display: grid;
  grid-template-columns: 170px 1fr 80px;
  gap: 16px;
  align-items: start;
  margin-bottom: 28px;
}

.invoice-number-box {
  direction: ltr;
  text-align: center;
  font-size: 16px;
  line-height: 1.45;
}

.invoice-number-box b {
  direction: rtl;
}

.buyer-box {
  text-align: right;
  line-height: 1.55;
  font-size: 16px;
}

.to-label {
  font-weight: 900;
  font-size: 18px;
  line-height: 1.5;
}

.invoice-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  table-layout: fixed;
}

.invoice-table th,
.invoice-table td {
  border: 1px solid #222;
  padding: 7px 6px;
  text-align: center;
  vertical-align: middle;
}

.invoice-table th {
  background: #e6e6e6;
  font-weight: 900;
}

.invoice-table .desc {
  text-align: right;
}

.totals-table {
  width: 390px;
  margin-top: 10px;
  margin-right: auto;
  margin-left: 0;
  border-collapse: collapse;
  font-size: 16px;
}

.totals-table td {
  border-bottom: 2px solid #000;
  padding: 7px 8px;
  font-weight: 700;
}

.totals-table td:first-child {
  text-align: right;
}

.totals-table td:last-child {
  text-align: left;
  direction: ltr;
  white-space: nowrap;
}

.totals-table .grand td {
  background: #e6e6e6;
  font-weight: 900;
}

.stamp-area {
  margin-top: 80px;
  text-align: right;
  padding-right: 62%;
}

.stamp-area img {
  width: 230px;
  opacity: .95;
}

.page-count {
  position: absolute;
  bottom: 12mm;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 18px;
}

.toolbar {
  max-width: 210mm;
  margin: 14px auto 0;
  display: flex;
  gap: 8px;
  justify-content: flex-start;
  direction: rtl;
}

@page {
  size: A4 portrait;
  margin: 0;
}

@media print {
  body {
    background: #fff;
  }

  .toolbar,
  .no-print {
    display: none !important;
  }

  .invoice-page {
    margin: 0;
    box-shadow: none;
    width: 210mm;
    min-height: 297mm;
    page-break-after: always;
  }
}

@media (max-width: 800px) {
  .form-grid,
  .form-grid-3 {
    grid-template-columns: 1fr;
  }

  .invoice-page {
    width: 100%;
    min-height: auto;
    padding: 18px;
    overflow-x: auto;
  }
}