/* InvoiceFlow Pro - Modern B2B Invoice & Receipt Maker */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=JetBrains+Mono:wght@500;700&display=swap');

:root {
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-tertiary: #1f2937;
  --bg-card: rgba(17, 24, 39, 0.85);
  --border-subtle: rgba(255, 255, 255, 0.08);

  --text-main: #f9fafb;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;

  --indigo: #6366f1;
  --indigo-grad: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
  --emerald: #10b981;

  --radius-xs: 3px;
  --radius-sm: 4px;
  --radius-md: 5px;
  --radius-lg: 6px;
  --radius-full: 4px;
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-card: #ffffff;
  --border-subtle: rgba(0, 0, 0, 0.08);
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-dim: #94a3b8;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Plus Jakarta Sans', sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-main);
  min-height: 100vh;
}

.container { max-width: 1400px; margin: 0 auto; padding: 0 16px; }

.navbar {
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(16px);
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-subtle);
  padding: 10px 0;
}
.nav-wrapper { display: flex; justify-content: space-between; align-items: center; }
.brand-logo { font-size: 1.15rem; font-weight: 800; color: var(--text-main); text-decoration: none; display: flex; align-items: center; gap: 8px; }
.brand-badge { background: var(--indigo-grad); color: #fff; font-size: 0.65rem; padding: 2px 7px; border-radius: var(--radius-sm); font-weight: 700; }

.ad-slot-header { margin: 10px 0 6px 0; display: flex; justify-content: center; }
.ad-leaderboard {
  width: 728px; min-height: 70px;
  background: var(--bg-card); border: 1px dashed var(--border-subtle);
  border-radius: var(--radius-md); display: flex; flex-direction: column; align-items: center; justify-content: center;
}
.ad-label { font-size: 0.65rem; text-transform: uppercase; color: var(--text-dim); padding: 2px 0; }
.ad-mock-content {
  display: flex; align-items: center; justify-content: space-between; width: 100%; padding: 8px 16px; gap: 10px;
  background: linear-gradient(90deg, rgba(99, 102, 241, 0.08), rgba(16, 185, 129, 0.08));
}
.ad-mock-btn { background: var(--indigo-grad); color: #fff; border: none; padding: 6px 14px; border-radius: var(--radius-sm); font-weight: 700; cursor: pointer; font-size: 0.82rem; }

/* Main Split View: Editor on Left, Paper Preview on Right */
.app-grid {
  display: grid;
  grid-template-columns: 1fr 1.05fr 290px;
  gap: 16px;
  margin: 16px 0 32px 0;
  align-items: start;
}

.editor-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 16px 18px;
}

.paper-preview {
  background: #ffffff;
  color: #111827;
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
  font-size: 0.85rem;
  min-height: 520px;
}

.input-row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 10px; }
.input-label { display: block; font-size: 0.74rem; font-weight: 700; color: var(--text-muted); margin-bottom: 3px; }
.form-ctrl {
  width: 100%; background: var(--bg-secondary); border: 1px solid var(--border-subtle);
  color: var(--text-main); padding: 8px 10px; border-radius: var(--radius-sm); font-family: inherit; font-size: 0.84rem; outline: none;
}
.form-ctrl:focus { border-color: var(--indigo); }

/* Item List */
.item-table { width: 100%; border-collapse: collapse; margin: 12px 0; }
.item-table th { text-align: left; font-size: 0.72rem; color: var(--text-dim); padding-bottom: 6px; }
.item-table td { padding: 4px 0; }
.btn-del { background: transparent; border: none; color: #ef4444; cursor: pointer; font-size: 0.95rem; }

.btn-add {
  background: var(--bg-tertiary); border: 1px dashed var(--border-subtle); color: var(--text-main);
  padding: 7px; width: 100%; border-radius: var(--radius-sm); font-weight: 600; cursor: pointer; margin-bottom: 12px; font-size: 0.82rem;
}
.btn-add:hover { border-color: var(--indigo); color: var(--indigo); }

.btn-action-primary {
  background: var(--indigo-grad); color: #fff; border: none; padding: 10px 16px;
  border-radius: var(--radius-sm); font-weight: 700; cursor: pointer; width: 100%; font-size: 0.9rem;
}

/* Paper Preview Elements */
.paper-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 30px; }
.paper-title { font-size: 1.8rem; font-weight: 800; color: #4f46e5; text-transform: uppercase; }
.paper-table { width: 100%; border-collapse: collapse; margin: 24px 0; }
.paper-table th { background: #f3f4f6; padding: 10px; text-align: left; font-weight: 700; border-bottom: 2px solid #e5e7eb; }
.paper-table td { padding: 10px; border-bottom: 1px solid #f3f4f6; }
.paper-totals { margin-left: auto; width: 280px; margin-top: 14px; }
.totals-row { display: flex; justify-content: space-between; padding: 6px 0; font-size: 0.9rem; }
.totals-row.grand { font-size: 1.25rem; font-weight: 800; color: #4f46e5; border-top: 2px solid #e5e7eb; padding-top: 8px; }

/* Paper Footer Notes & Signature */
.paper-footer-notes {
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid #e5e7eb;
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 24px;
}

.notes-heading {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: #6b7280;
  margin-bottom: 6px;
}

.notes-text {
  font-size: 0.8rem;
  color: #4b5563;
  margin-bottom: 12px;
  line-height: 1.4;
}

.bank-details-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px 14px;
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 6px;
  padding: 10px 12px;
  font-size: 0.78rem;
  color: #374151;
}

.bank-lbl {
  color: #6b7280;
  font-size: 0.72rem;
  display: block;
}

.signature-block {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: flex-end;
  text-align: right;
  padding-bottom: 6px;
}

.signature-line {
  width: 220px;
  border-bottom: 1.5px solid #111827;
  margin-bottom: 6px;
}

.signature-label {
  font-size: 0.75rem;
  color: #6b7280;
  font-weight: 600;
}

/* Sticky Skyscraper Ad */
.sidebar-sticky-rail { position: sticky; top: 90px; }
.ad-skyscraper {
  width: 300px; min-height: 600px; background: var(--bg-card);
  border: 1px dashed var(--border-subtle); border-radius: var(--radius-md); text-align: center;
}

/* Institutional Grade A4 Portrait Print PDF Styles - Pure Monochrome Black & White */
@media print {
  @page {
    size: A4 portrait;
    margin: 12mm 15mm 15mm 15mm;
  }

  /* Universal monochrome reset: force all text to solid black and kill dark backgrounds */
  *, *::before, *::after {
    color: #000000 !important;
    background-color: transparent !important;
    background-image: none !important;
    box-shadow: none !important;
    text-shadow: none !important;
    -webkit-print-color-adjust: exact !important;
    print-color-adjust: exact !important;
  }

  html, body {
    background: #ffffff !important;
    color: #000000 !important;
    font-size: 9pt !important;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif !important;
  }

  .navbar, .ad-slot-header, .editor-card, .sidebar-sticky-rail, 
  .footer, .btn-action-primary, #currencySelector, button, input, select {
    display: none !important;
  }

  .container {
    max-width: 100% !important;
    padding: 0 !important;
    margin: 0 !important;
  }

  .app-grid {
    display: block !important;
    margin: 0 !important;
    padding: 0 !important;
  }

  .paper-preview {
    background: #ffffff !important;
    color: #000000 !important;
    border: none !important;
    box-shadow: none !important;
    padding: 0 !important;
    min-height: auto !important;
  }

  .paper-title {
    font-size: 20pt !important;
    font-weight: 800 !important;
    color: #000000 !important;
    letter-spacing: 0.05em !important;
  }

  .paper-table {
    width: 100% !important;
    border-collapse: collapse !important;
    border: 1.5px solid #000000 !important;
    page-break-inside: auto !important;
    margin: 16px 0 !important;
    background: #ffffff !important;
  }

  .paper-table tr {
    page-break-inside: avoid !important;
    background: #ffffff !important;
  }

  .paper-table th {
    background: #eeeeee !important;
    color: #000000 !important;
    font-size: 7.5pt !important;
    font-weight: 700 !important;
    text-transform: uppercase !important;
    border: 1px solid #000000 !important;
    border-bottom: 2px solid #000000 !important;
    padding: 6px 8px !important;
  }

  .paper-table td {
    color: #000000 !important;
    font-size: 8.5pt !important;
    border: 1px solid #cccccc !important;
    padding: 6px 8px !important;
    background: #ffffff !important;
  }

  .paper-totals {
    width: 280px !important;
    margin-left: auto !important;
    page-break-inside: avoid !important;
    border: 1px solid #000000 !important;
    background: #ffffff !important;
    padding: 6px 10px !important;
  }

  .totals-row {
    color: #000000 !important;
  }

  .totals-row.grand {
    color: #000000 !important;
    font-weight: 800 !important;
    border-top: 1.5px solid #000000 !important;
    font-size: 11pt !important;
    margin-top: 4px !important;
    padding-top: 4px !important;
  }

  .paper-footer-notes {
    page-break-inside: avoid !important;
    margin-top: 24px !important;
    padding-top: 12px !important;
    border-top: 1px solid #000000 !important;
    color: #333333 !important;
    font-size: 8pt !important;
  }

  .bank-details-grid {
    background: #f4f4f4 !important;
    border: 1px solid #000000 !important;
    padding: 8px 10px !important;
  }
}

@media (max-width: 1100px) {
  .app-grid { grid-template-columns: 1fr; }
  .sidebar-sticky-rail { display: none; }
}