@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Caveat:wght@600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  /* Core Theme */
  --bg-main: #0f172a;
  --bg-card: rgba(30, 41, 59, 0.85);
  --bg-card-hover: rgba(51, 65, 85, 0.9);
  --border-color: rgba(255, 255, 255, 0.1);
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --accent-gold: #f59e0b;

  /* Pencil Intake Theme (Grey/Lead) */
  --pencil-color: #64748b;
  --pencil-bg: rgba(100, 116, 139, 0.15);
  --pencil-border: #475569;
  --pencil-text: #cbd5e1;

  /* Red Evening Co Theme (Red Pen) */
  --red-color: #ef4444;
  --red-bg: rgba(239, 68, 68, 0.15);
  --red-border: #dc2626;
  --red-text: #fca5a5;

  /* Blue Customer Issue Theme (Blue Pen) */
  --blue-color: #3b82f6;
  --blue-bg: rgba(59, 130, 246, 0.15);
  --blue-border: #2563eb;
  --blue-text: #93c5fd;

  /* Ledger Paper Simulation */
  --paper-bg: #fefce8;
  --paper-line: #cbd5e1;
  --paper-text-pencil: #334155;
  --paper-text-red: #b91c1c;
  --paper-text-blue: #1d4ed8;

  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-hand: 'Caveat', cursive, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.5);
  --glass-backdrop: blur(12px);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  background-image: 
    radial-gradient(at 0% 0%, rgba(59, 130, 246, 0.12) 0px, transparent 50%),
    radial-gradient(at 100% 0%, rgba(239, 68, 68, 0.12) 0px, transparent 50%),
    radial-gradient(at 50% 100%, rgba(245, 158, 11, 0.08) 0px, transparent 50%);
  background-attachment: fixed;
  color: var(--text-main);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Container */
.app-container {
  max-width: 1600px;
  margin: 0 auto;
  padding: 1.5rem;
}

/* Header Navbar */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  background: var(--bg-card);
  backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-lg);
}

.brand-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, #f59e0b, #ef4444, #3b82f6);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 0 15px rgba(245, 158, 11, 0.4);
}

.brand-text h1 {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(to right, #ffffff, #cbd5e1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-text p {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Action Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.1rem;
  border-radius: 0.6rem;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid transparent;
  outline: none;
  text-decoration: none;
}

.btn-pencil {
  background: rgba(100, 116, 139, 0.25);
  border-color: #475569;
  color: #f1f5f9;
}
.btn-pencil:hover {
  background: rgba(100, 116, 139, 0.4);
  border-color: #94a3b8;
  transform: translateY(-1px);
}

.btn-red {
  background: linear-gradient(135deg, #dc2626, #b91c1c);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(220, 38, 38, 0.35);
}
.btn-red:hover {
  background: linear-gradient(135deg, #ef4444, #dc2626);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(239, 68, 68, 0.5);
}

.btn-blue {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
}
.btn-blue:hover {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(59, 130, 246, 0.5);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--border-color);
  color: var(--text-main);
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
}

/* Mode Switcher Tabs */
.view-tabs {
  display: flex;
  background: rgba(15, 23, 42, 0.6);
  padding: 0.3rem;
  border-radius: 0.75rem;
  border: 1px solid var(--border-color);
  gap: 0.25rem;
}

.tab-btn {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.9rem;
  border-radius: 0.5rem;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.tab-btn.active {
  background: #334155;
  color: var(--text-main);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}

/* Stats Cards Bar */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background: var(--bg-card);
  backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--border-color);
  border-radius: 0.9rem;
  padding: 1.1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
}

.stat-card.pencil::before { background: var(--pencil-color); }
.stat-card.red::before { background: var(--red-color); }
.stat-card.blue::before { background: var(--blue-color); }
.stat-card.total::before { background: var(--accent-gold); }

.stat-info h4 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.stat-info .stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  font-family: var(--font-mono);
}

.stat-icon {
  width: 42px;
  height: 42px;
  border-radius: 0.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.stat-card.pencil .stat-icon { background: var(--pencil-bg); color: var(--pencil-text); }
.stat-card.red .stat-icon { background: var(--red-bg); color: var(--red-text); }
.stat-card.blue .stat-icon { background: var(--blue-bg); color: var(--blue-text); }
.stat-card.total .stat-icon { background: rgba(245, 158, 11, 0.15); color: var(--accent-gold); }

/* Control Toolbar */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background: var(--bg-card);
  padding: 1rem 1.25rem;
  border-radius: 0.9rem;
  border: 1px solid var(--border-color);
  margin-bottom: 1.5rem;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid var(--border-color);
  border-radius: 0.6rem;
  padding: 0.5rem 0.85rem;
  width: 320px;
  max-width: 100%;
}

.search-box input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-main);
  font-size: 0.875rem;
  width: 100%;
}

.filter-pills {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.pill {
  padding: 0.35rem 0.75rem;
  border-radius: 2rem;
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid var(--border-color);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-muted);
  transition: all 0.2s ease;
  text-decoration: none;
}

.pill.active, .pill:hover {
  background: rgba(255, 255, 255, 0.12);
  color: var(--text-main);
}
.pill.active.pencil { border-color: var(--pencil-color); color: var(--pencil-text); background: var(--pencil-bg); }
.pill.active.red { border-color: var(--red-color); color: var(--red-text); background: var(--red-bg); }
.pill.active.blue { border-color: var(--blue-color); color: var(--blue-text); background: var(--blue-bg); }

/* Ledger Realistic Physical Register Book */
.ledger-book-wrapper {
  background: #111827;
  padding: 1.5rem;
  border-radius: 1.2rem;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  overflow-x: auto;
}

.ledger-book {
  min-width: 1280px;
  background: var(--paper-bg);
  color: #1e293b;
  border-radius: 8px;
  box-shadow: inset 0 0 15px rgba(0, 0, 0, 0.15), 0 10px 30px rgba(0, 0, 0, 0.5);
  border: 2px solid #d97706;
  position: relative;
  padding: 1rem;
}

/* Center binding crease of the physical book */
.ledger-book::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 48.5%;
  width: 12px;
  background: linear-gradient(to right, rgba(0, 0, 0, 0.15), rgba(0, 0, 0, 0.02), rgba(0, 0, 0, 0.15));
  z-index: 10;
  pointer-events: none;
}

.ledger-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.ledger-table th, .ledger-table td {
  border: 1px solid var(--paper-line);
  padding: 0.6rem 0.5rem;
  text-align: left;
  vertical-align: middle;
}

.ledger-table th {
  background: #fef08a;
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: #334155;
}

.ledger-table th.red-header {
  color: var(--paper-text-red);
  background: #fee2e2;
}

.ledger-table th.blue-header {
  color: var(--paper-text-blue);
  background: #dbeafe;
}

/* Cell Colors according to Paper Ink */
.cell-pencil {
  color: var(--paper-text-pencil);
  font-family: var(--font-sans);
  font-size: 0.92rem;
  font-weight: 500;
}

.cell-red {
  color: var(--paper-text-red);
  font-family: var(--font-sans);
  font-size: 0.92rem;
  font-weight: 600;
}

.cell-blue {
  color: var(--paper-text-blue);
  font-family: var(--font-sans);
  font-size: 0.92rem;
  font-weight: 600;
}

.badge-status {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.55rem;
  border-radius: 1rem;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  font-family: var(--font-sans);
}

.badge-pencil { background: #e2e8f0; color: #334155; border: 1px solid #94a3b8; }
.badge-red { background: #fef2f2; color: #991b1b; border: 1px solid #fca5a5; }
.badge-blue { background: #eff6ff; color: #1e40af; border: 1px solid #93c5fd; }

/* Modern Table View */
.table-responsive {
  overflow-x: auto;
  background: var(--bg-card);
  border-radius: 0.9rem;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
}

.modern-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.modern-table th {
  background: rgba(15, 23, 42, 0.8);
  padding: 0.85rem 1rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
}

.modern-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 0.875rem;
}

.modern-table tr:hover {
  background: var(--bg-card-hover);
}

/* Serial Badge */
.serial-badge {
  font-family: var(--font-mono);
  background: rgba(15, 23, 42, 0.6);
  padding: 0.2rem 0.45rem;
  border-radius: 0.35rem;
  border: 1px solid var(--border-color);
  color: var(--accent-gold);
  font-weight: 600;
}

/* Modals */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 1rem;
  animation: fadeIn 0.2s ease;
}

.modal-overlay.active {
  display: flex;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-card {
  background: #1e293b;
  border: 1px solid var(--border-color);
  border-radius: 1.2rem;
  width: 100%;
  max-width: 600px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
  overflow: hidden;
  animation: slideUp 0.25s ease;
}

@keyframes slideUp {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.modal-header.pencil { background: var(--pencil-bg); border-bottom-color: var(--pencil-border); }
.modal-header.red { background: var(--red-bg); border-bottom-color: var(--red-border); }
.modal-header.blue { background: var(--blue-bg); border-bottom-color: var(--blue-border); }

.modal-header h3 {
  font-size: 1.1rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.close-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.25rem;
  border-radius: 0.4rem;
  display: flex;
}

.close-btn:hover { color: var(--text-main); background: rgba(255, 255, 255, 0.1); }

.modal-body {
  padding: 1.5rem;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-group.full-width {
  grid-column: span 2;
}

.form-group label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.form-group input, .form-group select, .form-group textarea {
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid var(--border-color);
  border-radius: 0.6rem;
  padding: 0.65rem 0.85rem;
  color: var(--text-main);
  font-size: 0.9rem;
  font-family: var(--font-sans);
  outline: none;
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: #3b82f6;
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

.modal-footer {
  padding: 1rem 1.5rem;
  background: rgba(15, 23, 42, 0.5);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
}

/* Customer Receipt Printable Styling */
.receipt-printable {
  background: #ffffff;
  color: #000000;
  padding: 2rem;
  border-radius: 0.5rem;
  font-family: var(--font-sans);
  max-width: 500px;
  margin: 0 auto;
}

.receipt-header {
  text-align: center;
  border-bottom: 2px dashed #000;
  padding-bottom: 1rem;
  margin-bottom: 1rem;
}

.receipt-header h2 {
  font-size: 1.5rem;
  font-weight: 800;
  text-transform: uppercase;
}

.receipt-header p {
  font-size: 0.85rem;
  color: #4b5563;
}

.receipt-details-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
}

.receipt-details-table td {
  padding: 0.4rem 0;
  font-size: 0.9rem;
  border-bottom: 1px solid #e5e7eb;
}

.receipt-details-table td.label {
  font-weight: 700;
  color: #374151;
  width: 45%;
}

.receipt-footer {
  text-align: center;
  border-top: 2px dashed #000;
  padding-top: 1rem;
  font-size: 0.8rem;
  color: #6b7280;
}

/* Print Rules */
@media print {
  body * {
    visibility: hidden;
  }
  .receipt-printable, .receipt-printable * {
    visibility: visible;
  }
  .receipt-printable {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
  }
}

/* Mobile & Tablet Responsiveness */
@media (max-width: 900px) {
  .app-container {
    padding: 0.85rem;
  }

  .app-header {
    flex-direction: column;
    align-items: stretch;
    gap: 1rem;
    padding: 1rem;
  }

  .nav-actions {
    flex-wrap: wrap;
    justify-content: stretch;
  }

  .nav-actions .btn, .nav-actions label {
    flex: 1;
    justify-content: center;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
  }

  .toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .search-box {
    width: 100%;
  }

  .filter-pills {
    justify-content: space-between;
  }

  .pill {
    flex: 1;
    text-align: center;
  }

  .view-tabs {
    width: 100%;
  }

  .view-tabs .tab-btn {
    flex: 1;
    justify-content: center;
  }

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

  .form-group.full-width {
    grid-column: span 1;
  }

  .modal-card {
    max-height: 90vh;
    overflow-y: auto;
  }
}

@media (max-width: 500px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .brand-text h1 {
    font-size: 1.15rem;
  }

  .ledger-book-wrapper {
    padding: 0.75rem;
    border-radius: 0.8rem;
  }

  .modal-header {
    padding: 1rem;
  }

  .modal-body {
    padding: 1rem;
  }
}