/* =============================================================================
   Project: Invoice Processing Tool
   Author: Kaycee [ONAH FRANKLYN KENECHUKWU]
   Built with Google Antigravity
   =============================================================================
   Kaycee Invoicing - Financial Operations & Ledger Design System
   Visual Identity: Warm Charcoal & Antique Copper
   ============================================================================= */

:root {
  /* Core Color System */
  --bg-app: #11110F;
  --bg-secondary: #151513;
  --bg-card: #1B1A17;
  --bg-card-hover: #211F1B;
  --border-color: #302E28;
  --border-strong: #3A3730;
  --border-hover: #4A4338;

  /* Typography Colors */
  --text-primary: #F1EEE6;
  --text-secondary: #A29D91;
  --text-muted: #777268;

  /* Primary Accent - Antique Copper */
  --primary: #B98255;
  --primary-light: #C99A70;
  --primary-hover: #C99A70;
  --primary-active: #9D683E;
  --primary-bg: rgba(185, 130, 85, 0.10);
  --primary-border: rgba(185, 130, 85, 0.28);

  /* Semantic Status Colors */
  --success: #6F9278;
  --success-bg: rgba(111, 146, 120, 0.10);
  --success-border: rgba(111, 146, 120, 0.30);

  --warning: #B28A4A;
  --warning-bg: rgba(178, 138, 74, 0.10);
  --warning-border: rgba(178, 138, 74, 0.30);

  --destructive: #A8665F;
  --destructive-bg: rgba(168, 102, 95, 0.10);
  --destructive-border: rgba(168, 102, 95, 0.30);

  /* Table Specific */
  --table-header: #211F1B;
  --table-body: #1B1A17;
  --table-row-hover: #211F1B;
  --table-secondary: #777268;

  /* Typography */
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'IBM Plex Mono', 'JetBrains Mono', monospace;

  /* Calibrated Border Radii */
  --radius-card: 14px;
  --radius-table: 12px;
  --radius-input: 9px;
  --radius-btn: 8px;
  --radius-badge: 7px;
  --radius-sm: 6px;

  /* Soft Shadows */
  --shadow-soft: 0 8px 24px rgba(0, 0, 0, 0.18);
  --shadow-modal: 0 12px 32px rgba(0, 0, 0, 0.38);
  --shadow-btn: 0 1px 2px rgba(0, 0, 0, 0.25);

  /* Transitions */
  --transition-fast: 150ms ease-out;
  --transition-btn: 120ms ease-out;
  --transition-normal: 200ms ease-out;
}

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

/* Custom Scrollbar - Warm Charcoal */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-app);
}
::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--border-strong);
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-app);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

/* Monospace restricted strictly to numbers, IDs, and financial amounts */
.font-mono {
  font-family: var(--font-mono);
  font-feature-settings: "tnum" 1;
}

.text-right { text-align: right; }
.text-center { text-align: center; }

/* Focus States - Subtle Copper Outline */
input:focus,
select:focus,
textarea:focus,
button:focus-visible {
  outline: none;
  border-color: var(--primary) !important;
  box-shadow: 0 0 0 2px rgba(185, 130, 85, 0.12) !important;
}

/* Layout Container */
.app-layout {
  max-width: 1360px;
  margin: 0 auto;
  padding: 24px 28px 48px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.main-content {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

/* Top App Header */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-soft);
  flex-wrap: wrap;
  gap: 16px;
}

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

.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-btn);
  background-color: var(--bg-secondary);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-color);
  flex-shrink: 0;
}

.brand-title-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.brand-subtitle {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

/* Action Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  font-size: 0.84rem;
  font-weight: 500;
  border-radius: var(--radius-btn);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition-btn), 
              border-color var(--transition-btn), 
              color var(--transition-btn), 
              transform var(--transition-btn);
  text-decoration: none;
  font-family: inherit;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.78rem;
  border-radius: var(--radius-btn);
}

/* Primary Button - Antique Copper Accent */
.btn-primary {
  background-color: var(--primary);
  color: #11110F;
  font-weight: 600;
  border-color: var(--primary);
  box-shadow: var(--shadow-btn);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--primary-hover);
  border-color: var(--primary-hover);
}

.btn-primary:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

/* Secondary Button - Charcoal Foundation */
.btn-secondary {
  background-color: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--border-color);
  box-shadow: var(--shadow-btn);
}

.btn-secondary:hover {
  background-color: #25221D;
  border-color: var(--border-hover);
  color: #FFFFFF;
}

.btn-ghost {
  background-color: transparent;
  color: var(--text-secondary);
  border-color: var(--border-color);
}

.btn-ghost:hover {
  color: var(--text-primary);
  background-color: #25221D;
  border-color: var(--border-hover);
}



/* ==========================================================================
   TOP SUMMARY CARDS
   All 4 cards share the same charcoal foundation.
   ========================================================================== */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
  margin-bottom: 8px;
}

.metric-card {
  padding: 22px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-soft);
  cursor: pointer;
  user-select: none;
  position: relative;
  transition: transform 180ms cubic-bezier(0.16, 1, 0.3, 1), 
              background-color 180ms ease-out, 
              border-color 180ms ease-out,
              box-shadow 180ms ease-out;
}

/* Initial Load Stagger Animation */
.metric-card:nth-child(1) { animation: cardFadeIn 300ms ease-out 0ms both; }
.metric-card:nth-child(2) { animation: cardFadeIn 300ms ease-out 60ms both; }
.metric-card:nth-child(3) { animation: cardFadeIn 300ms ease-out 120ms both; }
.metric-card:nth-child(4) { animation: cardFadeIn 300ms ease-out 180ms both; }

@keyframes cardFadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Subtle, Disciplined Hover Animation */
.metric-card:hover {
  background-color: var(--bg-card-hover);
  border-color: rgba(185, 130, 85, 0.45);
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.32);
}

.metric-card:active {
  transform: translateY(-1px);
  transition-duration: 80ms;
}

.metric-card:focus-visible {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(185, 130, 85, 0.2);
}

.metric-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.metric-label {
  font-size: 0.74rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}

/* Understated, Disciplined Card Icon Badges with Hover Micro-Lift */
.metric-icon-badge {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-btn);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  transition: transform 200ms cubic-bezier(0.16, 1, 0.3, 1),
              background-color 200ms ease-out,
              border-color 200ms ease-out;
}

.metric-card:hover .metric-icon-badge {
  transform: translateY(-2px) scale(1.08);
}

/* Card 1: Total Invoiced - Muted Copper Icon */
.total-badge {
  color: var(--primary);
  border-color: var(--border-color);
}
.metric-card:hover .total-badge {
  background-color: rgba(185, 130, 85, 0.14);
  border-color: rgba(185, 130, 85, 0.35);
}

/* Card 2: Paid Invoices - Muted Sage Check Icon */
.paid-badge {
  color: var(--success);
  border-color: var(--border-color);
}
.metric-card:hover .paid-badge {
  background-color: rgba(111, 146, 120, 0.14);
  border-color: rgba(111, 146, 120, 0.35);
}

/* Card 3: Pending / Due - Bronze Clock Icon */
.pending-badge {
  color: var(--warning);
  border-color: var(--border-color);
}
.metric-card:hover .pending-badge {
  background-color: rgba(178, 138, 74, 0.14);
  border-color: rgba(178, 138, 74, 0.35);
}

/* Card 4: Active Vendors - Muted Copper Icon */
.vendor-badge {
  color: var(--primary);
  border-color: var(--border-color);
}
.metric-card:hover .vendor-badge {
  background-color: rgba(185, 130, 85, 0.14);
  border-color: rgba(185, 130, 85, 0.35);
}

/* Financial Values - Monospace font-feature numeric alignment */
.metric-value {
  font-size: 1.75rem;
  font-weight: 600;
  font-family: var(--font-mono);
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--text-primary); /* Ivory */
}

/* Paid card amount uses muted sage */
.text-emerald {
  color: var(--success) !important;
}

/* Pending card amount uses bronze */
.text-amber {
  color: var(--warning) !important;
}

.metric-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* Clickable Cue Hint */
.metric-hint {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--primary);
  opacity: 0.55;
  transition: opacity 180ms ease-out, transform 180ms ease-out;
}

.metric-card:hover .metric-hint {
  opacity: 1;
  transform: translateX(3px);
}

/* KPI Breakdown Modal Styles */
.kpi-modal-stats-strip {
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 14px 24px;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  flex-wrap: wrap;
}

.kpi-stat-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.kpi-stat-label {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.kpi-stat-value {
  font-size: 1.15rem;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--text-primary);
}

/* Vendor Directory List View inside Modal */
.vendor-directory-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.vendor-directory-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-btn);
  gap: 16px;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.vendor-directory-card:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-1px);
}

.vendor-dir-left {
  display: flex;
  align-items: center;
  gap: 14px;
  flex: 1;
  min-width: 0;
}

.vendor-dir-info {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.vendor-dir-name {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.vendor-dir-meta {
  font-size: 0.76rem;
  color: var(--text-muted);
  display: flex;
  gap: 12px;
  margin-top: 2px;
  flex-wrap: wrap;
}

.vendor-dir-right {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-shrink: 0;
}

.vendor-spend-block {
  text-align: right;
}

.vendor-spend-amount {
  font-family: var(--font-mono);
  font-size: 0.96rem;
  font-weight: 600;
  color: var(--text-primary);
}

.vendor-spend-count {
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* ==========================================================================
   TABLE SECTION & CONTROLS
   ========================================================================== */
.table-section {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-soft);
  animation: tableFadeIn 350ms ease-out 240ms both;
}

@keyframes tableFadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.section-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.search-box {
  position: relative;
  display: flex;
  align-items: center;
  flex: 1 1 240px;
  min-width: 0;
  max-width: 440px;
  width: 100%;
}

.search-icon {
  position: absolute;
  left: 12px;
  color: var(--text-muted);
  pointer-events: none;
}

.search-box input {
  width: 100%;
  padding: 9px 36px 9px 36px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-input);
  color: var(--text-primary);
  font-size: 0.85rem;
  font-family: inherit;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-box input::placeholder {
  color: var(--text-muted);
}

.search-box input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(185, 130, 85, 0.12);
}

.clear-btn {
  position: absolute;
  right: 12px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.1rem;
  cursor: pointer;
  line-height: 1;
}

.clear-btn:hover {
  color: var(--text-primary);
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.filter-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.filter-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.select-control {
  padding: 8px 12px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-input);
  color: var(--text-primary);
  font-size: 0.82rem;
  font-family: inherit;
  outline: none;
  cursor: pointer;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.select-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(185, 130, 85, 0.12);
}

/* Invoices Table Container */
.mobile-table-hint {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 12px;
  font-size: 0.74rem;
  font-weight: 500;
  color: var(--text-secondary);
  background-color: var(--bg-secondary);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-sm);
  margin-bottom: 2px;
}

.table-responsive {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-table);
  border: 1px solid var(--border-color);
  background-color: var(--table-body);
  min-height: 240px;
  width: 100%;
  max-width: 100%;
}

.invoices-table {
  width: 100%;
  min-width: 740px;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.86rem;
}

/* Table Header & Column Sizing Integrity */
.invoices-table thead th {
  background-color: var(--table-header);
  padding: 12px 18px;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.th-vendor { min-width: 200px; }
.th-id { min-width: 120px; white-space: nowrap; }
.th-date { min-width: 110px; white-space: nowrap; }
.th-due { min-width: 110px; white-space: nowrap; }
.th-status { min-width: 105px; white-space: nowrap; }
.th-total { min-width: 120px; white-space: nowrap; }
.th-actions { min-width: 95px; white-space: nowrap; }

.invoices-table td:nth-child(2),
.invoices-table td:nth-child(3),
.invoices-table td:nth-child(4),
.invoices-table td:nth-child(5),
.invoices-table td:nth-child(6),
.invoices-table td:nth-child(7) {
  white-space: nowrap;
}

/* Table Body & Restrained Row Hover Transition */
.invoices-table tbody tr {
  cursor: pointer;
  background-color: var(--table-body);
  transition: background-color 150ms ease-out, border-color 150ms ease-out;
}

.invoices-table tbody tr:hover {
  background-color: var(--table-row-hover);
}

.invoices-table tbody tr:not(:last-child) td {
  border-bottom: 1px solid var(--border-color);
}

.invoices-table td {
  padding: 14px 18px;
  vertical-align: middle;
}

/* Vendor Column Presentation */
.vendor-cell {
  display: flex;
  align-items: center;
  gap: 12px;
}

.vendor-avatar {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-btn);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.78rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.vendor-info {
  display: flex;
  flex-direction: column;
}

/* Strong Vendor Name Hierarchy - Ivory */
.vendor-name {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.88rem;
}

/* Quieter Category Hierarchy - Muted */
.vendor-category {
  font-size: 0.74rem;
  color: var(--text-muted);
  margin-top: 1px;
}

/* Invoice Number - Antique Copper Accent */
.invoice-number-cell {
  color: var(--primary);
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.84rem;
}

/* Monetary Values - Warm Ivory Font-Mono */
.total-cell-value {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--text-primary);
}

/* Dates */
.date-primary {
  color: var(--text-primary);
  font-size: 0.84rem;
}

.date-due {
  color: var(--text-secondary);
  font-size: 0.84rem;
}

/* ==========================================================================
   STATUS BADGES
   ========================================================================== */
.badge-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  border-radius: var(--radius-badge);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.badge-status::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: currentColor;
}

/* Paid Badge - Muted Sage */
.badge-paid {
  color: #6F9278;
  background-color: rgba(111, 146, 120, 0.10);
  border: 1px solid rgba(111, 146, 120, 0.30);
}

/* Pending Badge - Bronze */
.badge-pending {
  color: #B28A4A;
  background-color: rgba(178, 138, 74, 0.10);
  border: 1px solid rgba(178, 138, 74, 0.30);
}

/* Overdue Badge - Muted Brick */
.badge-overdue {
  color: #A8665F;
  background-color: rgba(168, 102, 95, 0.10);
  border: 1px solid rgba(168, 102, 95, 0.30);
}

/* Row Action Buttons */
.row-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.btn-icon {
  width: 30px;
  height: 30px;
  padding: 0;
  border-radius: var(--radius-sm);
  background-color: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-btn);
}

.btn-icon:hover {
  background-color: #25221D;
  color: var(--text-primary);
  border-color: var(--border-hover);
  transform: translateY(-1px);
}

.btn-icon-danger:hover {
  color: var(--destructive);
  background-color: var(--destructive-bg);
  border-color: var(--destructive-border);
}

/* Empty State */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 56px 20px;
  text-align: center;
  gap: 12px;
}

.empty-icon {
  font-size: 2.2rem;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.empty-state h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
}

.empty-state p {
  color: var(--text-secondary);
  font-size: 0.84rem;
  max-width: 380px;
  margin-bottom: 8px;
}

.empty-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* Table Footer */
.table-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 2px;
}

/* ==========================================================================
   MODALS & DIALOGS
   ========================================================================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(10, 10, 9, 0.82);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}

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

.modal-container {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-modal);
  width: 100%;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.modal-md { max-width: 680px; }
.modal-lg { max-width: 820px; }

.modal-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-color);
}

.modal-title-group h2 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
}

.modal-description {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

.btn-close-modal {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.4rem;
  cursor: pointer;
  line-height: 1;
  padding: 4px;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast);
}

.btn-close-modal:hover {
  color: var(--text-primary);
}

.modal-body {
  padding: 24px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
}

/* Modal Tabs */
.modal-tabs {
  display: flex;
  gap: 8px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 12px;
}

.tab-btn {
  padding: 7px 14px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-btn);
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-btn);
}

.tab-btn:hover {
  color: var(--text-primary);
  background-color: #25221D;
  border-color: var(--border-hover);
  transform: translateY(-1px);
}

.tab-btn.active {
  background-color: var(--primary);
  color: #11110F;
  font-weight: 600;
  border-color: var(--primary);
}

.tab-panel {
  display: none;
  flex-direction: column;
  gap: 16px;
}

.tab-panel.active {
  display: flex;
}

.tab-instruction {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

/* Sample Cards Grid */
.sample-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 12px;
}

.sample-pick-card {
  padding: 14px 16px;
  border-radius: var(--radius-btn);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.sample-pick-card:hover {
  border-color: var(--primary);
  background-color: var(--bg-card-hover);
  transform: translateY(-1px);
}

.sample-pick-card.selected {
  border-color: var(--primary);
  background-color: var(--primary-bg);
}

.sample-pick-vendor {
  font-weight: 600;
  font-size: 0.86rem;
  color: var(--text-primary);
}

.sample-pick-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.76rem;
  color: var(--text-secondary);
}

.sample-pick-total {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.9rem;
}

/* Drop Zone */
.drop-zone {
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-btn);
  padding: 32px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-align: center;
  background-color: var(--bg-secondary);
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
  cursor: pointer;
}

.drop-zone:hover {
  border-color: var(--border-hover);
  background-color: #181816;
}

.drop-zone.dragover {
  border-color: var(--primary);
  background-color: var(--primary-bg);
}

.drop-icon {
  color: var(--primary);
  margin-bottom: 2px;
}

.drop-primary {
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--text-primary);
}

.drop-secondary {
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.textarea-control {
  width: 100%;
  padding: 12px 14px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-input);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.45;
  outline: none;
  resize: vertical;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.textarea-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(185, 130, 85, 0.12);
}

.paste-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Extraction Preview Box */
.extraction-card {
  padding: 16px;
  border-radius: var(--radius-btn);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.extraction-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.preview-fields-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px 16px;
}

.preview-field {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.preview-total-field {
  grid-column: span 2;
  border-top: 1px dashed var(--border-color);
  padding-top: 8px;
  margin-top: 4px;
}

.field-label {
  font-size: 0.7rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.field-val {
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--text-primary);
}

.total-highlight {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-primary);
  font-family: var(--font-mono);
}

/* ==========================================================================
   CREATE NEW INVOICE MODAL
   Clean financial inputs and dynamic line items calculation
   ========================================================================== */
.creator-modal-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.creator-section {
  display: flex;
  flex-direction: column;
  gap: 10px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 20px;
}

.creator-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.creator-section-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-grid-3 {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 14px;
}

.form-grid-4 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1.2fr;
  gap: 14px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-label {
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}

.input-control {
  width: 100%;
  padding: 8px 12px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-input);
  color: var(--text-primary);
  font-size: 0.84rem;
  font-family: inherit;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.input-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(185, 130, 85, 0.12);
}

.creator-table-wrapper {
  border-radius: var(--radius-btn);
  border: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
}

.creator-table {
  width: 100%;
  border-collapse: collapse;
}

.creator-table th {
  background-color: var(--table-header);
  padding: 10px 14px;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
}

.creator-table td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border-color);
  vertical-align: middle;
  background-color: var(--bg-secondary);
}

.creator-table tbody tr:last-child td {
  border-bottom: none;
}

.creator-table td input {
  width: 100%;
  padding: 7px 10px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.82rem;
  outline: none;
  transition: border-color var(--transition-fast);
}

.creator-table td input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(185, 130, 85, 0.12);
}

.creator-section-financials {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  flex-wrap: wrap;
  padding-top: 4px;
}

.creator-totals-box {
  width: 320px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-btn);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-left: auto;
}

.creator-calc-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.84rem;
  color: var(--text-secondary);
}

.creator-grand-row {
  border-top: 1px solid var(--border-color);
  padding-top: 10px;
  margin-top: 4px;
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--text-primary);
}

.input-tax-rate {
  width: 58px;
  padding: 3px 6px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--text-primary);
  font-size: 0.8rem;
  text-align: center;
  outline: none;
}

.input-tax-rate:focus {
  border-color: var(--primary);
}

/* ==========================================================================
   DIGITAL INVOICE SHEET VIEW (MODAL)
   Structured, clean financial ledger statement
   ========================================================================== */
.invoice-paper {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border-radius: var(--radius-card);
  padding: 30px;
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.inv-paper-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 16px;
}

.inv-brand-tag {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--primary);
}

.inv-paper-id {
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 4px 0 6px;
}

.inv-paper-meta {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.inv-paper-parties {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.party-role {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  display: block;
  margin-bottom: 4px;
}

.party-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.party-contact, .party-address {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

.inv-items-table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-table);
}

.inv-items-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
}

.inv-items-table th {
  background-color: var(--table-header);
  color: var(--text-secondary);
  font-weight: 600;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-color);
  text-transform: uppercase;
  font-size: 0.7rem;
  letter-spacing: 0.04em;
}

.inv-items-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
  background-color: var(--bg-secondary);
}

.inv-financials {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 24px;
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
}

.notes-text {
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.inv-totals-col {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.tot-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.84rem;
  color: var(--text-secondary);
}

.grand-total-row {
  border-top: 1px solid var(--border-color);
  padding-top: 10px;
  margin-top: 4px;
  font-weight: 600;
  color: var(--text-primary);
  font-size: 1.05rem;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 2000;
  pointer-events: none;
}

.toast {
  padding: 10px 16px;
  border-radius: var(--radius-btn);
  background-color: var(--bg-card-hover);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.28);
  font-size: 0.82rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
  pointer-events: auto;
  max-width: 380px;
}

.toast-success { border-left: 3px solid var(--success); }
.toast-info { border-left: 3px solid var(--primary); }
.toast-warning { border-left: 3px solid var(--warning); }
.toast-danger { border-left: 3px solid var(--destructive); }

/* Print Stylesheet */
@media print {
  body * {
    visibility: hidden;
  }
  #printable-area, #printable-area * {
    visibility: visible;
  }
  #printable-area {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    margin: 0;
    padding: 0;
    background: #ffffff !important;
    color: #000000 !important;
  }
  .invoice-paper {
    background: #ffffff !important;
    color: #000000 !important;
    box-shadow: none !important;
    border: none !important;
    padding: 0 !important;
  }
  .inv-items-table td, .inv-items-table th {
    background: #ffffff !important;
    color: #000000 !important;
    border-color: #d1d5db !important;
  }
}

/* =============================================================================
   RESPONSIVE DESIGN SYSTEM (MOBILE, TABLET & SMALL DESKTOPS)
   ============================================================================= */

/* Tier 1: Small Desktops & Large Tablets (<= 1024px) */
@media (max-width: 1024px) {
  .app-layout {
    padding: 18px 20px 40px;
    gap: 20px;
  }

  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }
}

/* Tier 2: Tablets & Standard Mobile Viewports (<= 768px) */
@media (max-width: 768px) {
  /* Layout Padding & Spacing */
  .app-layout {
    padding: 12px 14px 36px;
    gap: 16px;
  }

  .main-content {
    gap: 16px;
  }

  /* Header Optimization */
  .app-header {
    flex-direction: column;
    align-items: stretch;
    padding: 14px 16px;
    gap: 14px;
  }

  .brand-section {
    width: 100%;
  }

  .brand-title {
    font-size: 1.18rem;
  }

  .brand-subtitle {
    font-size: 0.78rem;
  }

  .header-actions {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    width: 100%;
  }

  .header-actions .btn {
    width: 100%;
    justify-content: center;
    padding: 10px 12px;
    font-size: 0.8rem;
    min-height: 42px;
  }

  #btn-open-creator {
    grid-column: span 2;
    order: -1;
    font-weight: 600;
  }

  /* Financial Summary KPI Cards */
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-bottom: 2px;
  }

  .metric-card {
    padding: 15px 14px;
    gap: 8px;
  }

  .metric-value {
    font-size: 1.35rem;
  }

  .metric-label {
    font-size: 0.68rem;
  }

  .metric-icon-badge {
    width: 28px;
    height: 28px;
  }

  .metric-footer {
    font-size: 0.72rem;
  }

  /* Table Section & Filter Controls */
  .table-section {
    padding: 14px 12px;
    gap: 12px;
    border-radius: var(--radius-table);
  }

  .section-toolbar {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  .search-box {
    min-width: 0;
    max-width: 100%;
    width: 100%;
  }

  .search-box input {
    font-size: 0.86rem;
    padding: 10px 36px;
  }

  .filter-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    width: 100%;
  }

  .filter-item {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    width: 100%;
  }

  .filter-item .select-control {
    width: 100%;
    min-height: 40px;
    font-size: 0.82rem;
    padding: 8px 10px;
  }

  #btn-quick-sample {
    grid-column: span 2;
    width: 100%;
    justify-content: center;
    min-height: 38px;
    padding: 8px;
  }

  /* Mobile Swipe Cue Banner */
  .mobile-table-hint {
    display: flex;
  }

  /* Table Footer */
  .table-footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding-top: 10px;
  }

  .footer-note {
    font-size: 0.72rem;
  }

  /* Modals Base Styling */
  .modal-overlay {
    padding: 10px 8px;
    align-items: flex-end;
  }

  .modal-container {
    max-height: 94vh;
    border-radius: 14px 14px 10px 10px;
    width: 100%;
  }

  .modal-header {
    padding: 14px 16px;
  }

  .modal-title-group h2 {
    font-size: 1.05rem;
  }

  .modal-body {
    padding: 14px 14px;
    gap: 14px;
  }

  .modal-footer {
    padding: 12px 14px;
    flex-direction: column-reverse;
    gap: 8px;
  }

  .modal-footer .btn {
    width: 100%;
    min-height: 42px;
    justify-content: center;
  }

  /* KPI Breakdown Modal */
  .kpi-modal-stats-strip {
    padding: 10px 14px;
    gap: 12px 16px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
  }

  .kpi-stat-value {
    font-size: 1.05rem;
  }

  .vendor-directory-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding: 12px 14px;
  }

  .vendor-dir-left {
    width: 100%;
  }

  .vendor-spend-badge {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border-color);
    padding-top: 8px;
  }

  /* Creator Modal */
  .creator-modal-body {
    padding: 14px 12px;
    gap: 14px;
  }

  .creator-section {
    padding: 12px 10px;
  }

  .form-grid-3,
  .form-grid-4 {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .creator-table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    width: 100%;
  }

  .creator-table {
    min-width: 520px;
  }

  .creator-section-financials {
    flex-direction: column;
    gap: 14px;
  }

  .creator-totals-box {
    width: 100%;
    max-width: 100%;
    margin-left: 0;
  }

  /* Reader Modal */
  .modal-tabs {
    flex-wrap: wrap;
    gap: 6px;
  }

  .tab-btn {
    flex: 1 1 auto;
    text-align: center;
    padding: 8px 10px;
    font-size: 0.78rem;
  }

  .sample-cards-grid {
    grid-template-columns: 1fr;
  }

  .paste-actions {
    flex-direction: column;
    width: 100%;
  }

  .paste-actions .btn {
    width: 100%;
    min-height: 40px;
  }

  .drop-zone {
    padding: 24px 14px;
  }

  .preview-fields-grid {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .preview-total-field {
    grid-column: span 1;
  }

  /* Invoice Detail Modal */
  .invoice-paper {
    padding: 16px 14px;
  }

  .inv-paper-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .inv-paper-meta.text-right {
    text-align: left;
  }

  .inv-paper-parties {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .party-col.text-right {
    text-align: left;
  }

  .inv-items-table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    width: 100%;
  }

  .inv-items-table {
    min-width: 440px;
  }

  .inv-financials {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  /* Toast Notifications on Mobile */
  .toast-container {
    bottom: 12px;
    right: 12px;
    left: 12px;
    max-width: calc(100% - 24px);
  }

  .toast {
    width: 100%;
    box-sizing: border-box;
  }
}

/* Tier 3: Compact Smartphones (<= 480px) */
@media (max-width: 480px) {
  .app-layout {
    padding: 8px 10px 28px;
    gap: 14px;
  }

  .metrics-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .metric-card {
    padding: 16px 16px;
  }

  .metric-value {
    font-size: 1.55rem;
  }

  .filter-group {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  #btn-quick-sample {
    grid-column: span 1;
  }

  .header-actions {
    grid-template-columns: 1fr 1fr;
    gap: 6px;
  }

  .header-actions .btn {
    font-size: 0.76rem;
    padding: 8px 6px;
    gap: 5px;
  }

  .brand-title {
    font-size: 1.12rem;
  }

  .brand-subtitle {
    font-size: 0.76rem;
  }
}

/* Tier 4: Ultra-Narrow Devices (<= 360px) */
@media (max-width: 360px) {
  .header-actions {
    grid-template-columns: 1fr;
  }

  #btn-open-creator {
    grid-column: span 1;
  }

  .metric-value {
    font-size: 1.3rem;
  }

  .app-layout {
    padding: 6px 8px 24px;
  }
}