:root {
  --primary: #0f4c81;
  --primary-dark: #0a355c;
  --accent: #1f7ed0;
  --surface: #f7fbff;
  --border: #d8e8f5;
  --text: #183244;
  --muted: #6c7b89;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(145deg, #eef6fc, #f8fbff);
  color: var(--text);
  line-height: 1.5;
}

img {
  max-width: 100%;
  display: block;
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(330px, 440px) 1fr;
  gap: 26px;
  padding: 24px;
  min-height: 100vh;
  align-items: start;
}

.form-panel {
  background: white;
  border-radius: 24px;
  padding: 22px;
  border: 1px solid var(--border);
  max-height: calc(100vh - 48px);
  overflow: auto;
  box-shadow: 0 16px 38px rgba(15, 76, 129, 0.08);
}

.panel-header {
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}

.eyebrow {
  font-size: 0.77rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
  margin: 0 0 6px;
}

.panel-header h1 {
  margin: 0;
  font-size: 1.45rem;
  color: var(--primary-dark);
  font-weight: 700;
}

.panel-subtitle {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.form-section {
  padding: 15px;
  background: var(--surface);
  border-radius: 16px;
  border: 1px solid var(--border);
  margin-bottom: 12px;
}

.section-title {
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 10px;
  font-size: 0.98rem;
  letter-spacing: 0.01em;
}

.logo-preview {
  width: 88px;
  height: 88px;
  object-fit: cover;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: white;
}

.charge-table th,
.charge-table td {
  white-space: nowrap;
}

.delete-row-btn {
  padding: 6px 10px;
  border-radius: 10px;
  min-width: 38px;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
  align-items: center;
}

.form-actions .btn {
  min-width: 110px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  padding: 10px 14px;
  border-radius: 12px;
}

.invoice-panel {
  background: transparent;
}

.preview-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  color: var(--muted);
  font-size: 0.92rem;
  padding: 0 2px;
}

.preview-toolbar-title {
  font-weight: 700;
  color: var(--primary-dark);
}

.invoice-paper {
  background: white;
  border: 1px solid var(--border);
  border-radius: 24px;
  box-shadow: 0 20px 50px rgba(15, 76, 129, 0.12);
  padding: 26px 28px;
  min-height: 1120px;
}

.invoice-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--border);
}

.brand-block {
  display: flex;
  gap: 14px;
  align-items: center;
}

.invoice-logo {
  width: 86px;
  height: 86px;
  border-radius: 16px;
  object-fit: cover;
  border: 1px solid var(--border);
}

.brand-block h2 {
  margin: 0 0 4px;
  font-size: 1.22rem;
  color: var(--primary-dark);
  font-weight: 700;
}

.muted {
  color: var(--muted);
  margin: 0;
  font-size: 0.92rem;
}

.invoice-badge {
  color: var(--accent);
  padding: 0;
  border-radius: 0;
  font-weight: 700;
  display: inline-block;
  margin-bottom: 8px;
  letter-spacing: 0.04em;
}

.meta-list {
  display: grid;
  gap: 8px;
  min-width: 240px;
}

.meta-list div,
.summary-list div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.92rem;
  align-items: center;
  min-height: 18px;
}

.meta-list span,
.summary-list span {
  color: var(--muted);
}

.company-meta,
.policy-grid,
.signature-grid {
  display: grid;
  gap: 16px;
  margin-top: 20px;
}

.company-meta {
  grid-template-columns: 1fr 1fr;
}

.meta-card,
.summary-card,
.policy-card,
.signature-card {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 13px 15px;
  background: #fcfeff;
}

.section-label {
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  margin-bottom: 6px;
  line-height: 1.2;
}

.summary-grid {
  margin-top: 18px;
}

.summary-list {
  display: grid;
  gap: 8px;
}

.charges-section {
  margin-top: 20px;
}

.invoice-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 8px;
}

.invoice-table th,
.invoice-table td {
  border: 1px solid var(--border);
  padding: 9px 8px;
  text-align: left;
  font-size: 0.92rem;
}

.invoice-table thead {
  background: #eff7fd;
}

.totals-section {
  display: flex;
  justify-content: flex-end;
  margin-top: 16px;
}

.totals-card {
  min-width: 320px;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 13px 14px;
  background: #fcfeff;
}

.totals-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
}

.totals-grand {
  font-size: 1.05rem;
  color: var(--primary-dark);
  padding-top: 8px;
  border-top: 1px solid var(--border);
}

.amount-words {
  margin-top: 16px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: #fcfeff;
}

.policy-grid {
  grid-template-columns: 1fr 1fr;
}

.policy-card ul {
  margin: 0;
  padding-left: 16px;
  color: var(--text);
}

.policy-card p {
  margin: 6px 0 0;
  color: var(--text);
}

.signature-grid {
  grid-template-columns: repeat(3, 1fr);
  align-items: stretch;
}

.signature-img,
.stamp-img {
  width: 100%;
  max-height: 96px;
  object-fit: contain;
  margin-top: 6px;
}

.signature-placeholder {
  border-bottom: 2px solid #cfd9e2;
  min-height: 62px;
  margin-bottom: 8px;
  margin-top: 6px;
}

.signature-name {
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 6px;
  min-height: 22px;
}

.invoice-footer {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 16px;
  border-top: 2px solid var(--border);
  padding-top: 14px;
}

.footer-text {
  margin: 0;
  color: var(--text);
  font-size: 0.9rem;
}

@media (max-width: 1200px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .form-panel {
    max-height: none;
  }
}

@media (max-width: 768px) {
  .app-shell {
    padding: 14px;
    gap: 16px;
  }

  .company-meta,
  .policy-grid,
  .signature-grid,
  .invoice-footer {
    grid-template-columns: 1fr;
  }

  .invoice-header {
    flex-direction: column;
    gap: 16px;
  }

  .invoice-paper {
    padding: 18px;
  }
}

@media print {
  @page {
    size: A4 portrait;
    margin: 4mm;
  }

  html,
  body {
    width: 100%;
    height: auto;
    background: white;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  body {
    margin: 0;
    padding: 0;
  }

  .app-shell {
    display: block;
    padding: 0;
  }

  .form-panel,
  .preview-toolbar {
    display: none !important;
  }

  .invoice-paper {
    width: 100%;
    max-width: 100%;
    min-height: auto;
    box-shadow: none;
    border: none;
    padding: 6mm 8mm;
    border-radius: 0;
    margin: 0;
    overflow: hidden;
    font-size: 9pt;
    line-height: 1.2;
  }

  .invoice-header {
    padding-bottom: 8px;
  }

  .invoice-logo {
    width: 68px;
    height: 68px;
  }

  .brand-block h2 {
    font-size: 1rem;
  }

  .meta-list,
  .summary-list {
    gap: 4px;
  }

  .meta-list div,
  .summary-list div,
  .totals-row {
    font-size: 8.8pt;
  }

  .company-meta,
  .policy-grid,
  .signature-grid,
  .invoice-footer {
    gap: 8px;
    margin-top: 8px;
  }

  .meta-card,
  .summary-card,
  .policy-card,
  .signature-card,
  .totals-card,
  .amount-words {
    padding: 7px 8px;
  }

  .invoice-table th,
  .invoice-table td {
    padding: 4px 6px;
    font-size: 8.5pt;
  }

  .charges-section,
  .totals-section,
  .amount-words {
    margin-top: 8px;
  }

  .footer-text,
  .policy-card p {
    font-size: 8.4pt;
  }

  .signature-img,
  .stamp-img {
    max-height: 60px;
  }

  .signature-placeholder {
    min-height: 36px;
  }

  .section-label {
    margin-bottom: 4px;
    font-size: 0.68rem;
  }

  .policy-card ul {
    padding-left: 12px;
    margin: 0;
  }

  .policy-card li {
    margin-bottom: 1px;
  }

  .invoice-badge {
    padding: 5px 8px;
    font-size: 7.4pt;
  }

  .totals-card {
    min-width: 240px;
  }

  .invoice-paper section,
  .invoice-paper header,
  .invoice-paper footer {
    break-inside: avoid;
    page-break-inside: avoid;
  }
}