/* ==========================================================================
   Design System & Modern Styling for Stock, Client & POS Management System
   ========================================================================== */

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

:root {
  /* Color Palette */
  --bg-main: #0b0f19;
  --bg-card: #151c2c;
  --bg-card-hover: #1e293b;
  --bg-sidebar: #0e1422;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: #6366f1;
  
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: rgba(99, 102, 241, 0.15);
  
  --success: #10b981;
  --success-light: rgba(16, 185, 129, 0.15);
  --warning: #f59e0b;
  --warning-light: rgba(245, 158, 11, 0.15);
  --danger: #ef4444;
  --danger-light: rgba(239, 68, 68, 0.15);
  --info: #06b6d4;
  --info-light: rgba(6, 182, 212, 0.15);

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.25);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Outfit', sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  display: flex;
  height: 100vh;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

/* App Container */
.app-container {
  display: flex;
  width: 100vw;
  height: 100vh;
}

/* Sidebar Navigation */
.sidebar {
  width: 260px;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 24px 16px;
  user-select: none;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 12px 24px 12px;
  border-bottom: 1px solid var(--border-color);
}

.brand-logo svg {
  width: 36px;
  height: 36px;
  color: var(--primary);
  filter: drop-shadow(0 0 8px rgba(99, 102, 241, 0.5));
}

.brand-name {
  font-size: 1.2rem;
  font-weight: 700;
  background: linear-gradient(135deg, #fff 30%, var(--primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 24px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  color: var(--text-muted);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-weight: 500;
  transition: var(--transition);
  text-decoration: none;
}

.nav-item:hover {
  background-color: var(--bg-card);
  color: var(--text-main);
}

.nav-item.active {
  background: linear-gradient(135deg, var(--primary), #4338ca);
  color: #fff;
  box-shadow: var(--shadow-glow);
}

.nav-item svg {
  width: 20px;
  height: 20px;
}

/* Premium Submenu Design */
.nav-admin-card {
  background: rgba(17, 24, 39, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 6px;
  margin-top: 8px;
  transition: var(--transition);
}

.nav-admin-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.nav-admin-header:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.04);
}

.chevron-icon {
  transition: transform 0.2s ease;
}
.nav-admin-header.open .chevron-icon {
  transform: rotate(180deg);
}

.nav-submenu {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 4px;
  padding: 0 2px;
}

.nav-subitem {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
  text-decoration: none;
  border-left: 3px solid transparent;
}

.nav-subitem:hover {
  background: rgba(99, 102, 241, 0.12);
  color: #fff;
  transform: translateX(3px);
}

.nav-subitem.active {
  background: linear-gradient(90deg, rgba(99, 102, 241, 0.25), rgba(99, 102, 241, 0.05));
  border-left-color: var(--primary);
  color: #fff;
  font-weight: 600;
  box-shadow: 0 0 15px rgba(99, 102, 241, 0.15);
}

.nav-subitem svg {
  width: 17px;
  height: 17px;
  opacity: 0.85;
  transition: opacity 0.2s ease;
}

.nav-subitem:hover svg,
.nav-subitem.active svg {
  opacity: 1;
  color: var(--primary);
}

.sidebar-footer {
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 12px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
}

.avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--info));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  color: #fff;
}

/* Main Content Area */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Header */
.top-header {
  height: 70px;
  border-bottom: 1px solid var(--border-color);
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(14, 20, 34, 0.6);
  backdrop-filter: blur(12px);
}

.header-title h1 {
  font-size: 1.4rem;
  font-weight: 600;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.search-box {
  position: relative;
  width: 300px;
}

.search-box input {
  width: 100%;
  padding: 10px 16px 10px 40px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-family: inherit;
  outline: none;
  transition: var(--transition);
}

.search-box input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.search-box svg {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--text-muted);
}

/* Content Views */
.view-container {
  flex: 1;
  padding: 24px 32px;
  overflow-y: auto;
}

.tab-view {
  display: none;
  animation: fadeIn 0.3s ease;
}

.tab-view.active {
  display: block;
}

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

/* Grid & Layouts */
.grid-kpi {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.kpi-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: var(--transition);
}

.kpi-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.15);
}

.kpi-icon {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.kpi-icon svg {
  width: 24px;
  height: 24px;
}

.kpi-icon.primary { background: var(--primary-light); color: var(--primary); }
.kpi-icon.success { background: var(--success-light); color: var(--success); }
.kpi-icon.warning { background: var(--warning-light); color: var(--warning); }
.kpi-icon.info { background: var(--info-light); color: var(--info); }

.kpi-info h3 {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

.kpi-info .kpi-value {
  font-size: 1.5rem;
  font-weight: 700;
  margin-top: 4px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--primary-hover);
  box-shadow: var(--shadow-glow);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}
.btn-secondary:hover {
  background: var(--bg-card-hover);
}

.btn-success {
  background: var(--success);
  color: #fff;
}
.btn-success:hover {
  filter: brightness(1.1);
}

.btn-danger {
  background: var(--danger);
  color: #fff;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8rem;
}

/* Tables */
.table-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 24px;
}

.table-header {
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
}

.table-header h2 {
  font-size: 1.1rem;
  font-weight: 600;
}

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

.custom-table th {
  background: rgba(0, 0, 0, 0.2);
  padding: 14px 20px;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border-color);
}

.custom-table td {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.95rem;
  vertical-align: middle;
}

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

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

/* Status Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 600;
}

.badge-success { background: var(--success-light); color: var(--success); }
.badge-warning { background: var(--warning-light); color: var(--warning); }
.badge-danger { background: var(--danger-light); color: var(--danger); }
.badge-info { background: var(--info-light); color: var(--info); }

/* Category Badges */
.cat-tag {
  display: inline-block;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
}

.cat-pneu { background: rgba(99, 102, 241, 0.2); color: #818cf8; }
.cat-consommable { background: rgba(16, 185, 129, 0.2); color: #34d399; }
.cat-it { background: rgba(6, 182, 212, 0.2); color: #22d3ee; }

/* Filter Tabs */
.filter-tabs {
  display: flex;
  gap: 10px;
}

.filter-btn {
  padding: 8px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-muted);
  cursor: pointer;
  font-weight: 500;
  font-size: 0.85rem;
  transition: var(--transition);
}

.filter-btn.active, .filter-btn:hover {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
}

/* POS Interface Layout */
.pos-layout {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 24px;
  height: calc(100vh - 130px);
}

.pos-products {
  display: flex;
  flex-direction: column;
  gap: 16px;
  overflow-y: auto;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 16px;
}

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.product-card-img {
  width: 100%;
  height: 130px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  border: 1px solid var(--border-color);
  background: var(--bg-main);
}

.table-item-cell {
  display: flex;
  align-items: center;
  gap: 12px;
}

.table-img {
  width: 48px;
  height: 48px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: var(--bg-main);
  flex-shrink: 0;
}

.product-card:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
  box-shadow: var(--shadow-glow);
}

.product-card .title {
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 6px;
}

.product-card .sku {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.product-card .price-row {
  margin-top: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.product-card .price {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--success);
}

/* Ticket / Cart Sidebar in POS */
.pos-cart {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.cart-header {
  padding: 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.cart-items {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.cart-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px;
  background: rgba(0, 0, 0, 0.2);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.cart-item-info h4 {
  font-size: 0.9rem;
  font-weight: 600;
}

.cart-item-info span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

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

.qty-btn {
  width: 26px;
  height: 26px;
  border-radius: 6px;
  background: var(--bg-card-hover);
  border: 1px solid var(--border-color);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.cart-summary {
  padding: 20px;
  border-top: 1px solid var(--border-color);
  background: rgba(0, 0, 0, 0.2);
}

.summary-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.summary-row.total {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-main);
  border-top: 1px solid var(--border-color);
  padding-top: 10px;
  margin-top: 10px;
}

/* Change Calculator Section ("Prix à rendre") */
.change-calc-box {
  margin-top: 16px;
  padding: 16px;
  background: rgba(99, 102, 241, 0.08);
  border: 1px solid var(--primary-light);
  border-radius: var(--radius-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 12px;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-family: inherit;
  font-size: 1rem;
  outline: none;
}

.form-control:focus {
  border-color: var(--primary);
}

.change-result {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--success);
  margin-top: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.breakdown-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.cash-tag {
  background: rgba(16, 185, 129, 0.2);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 3px 10px;
  border-radius: 6px;
  font-size: 0.82rem;
  font-weight: 600;
}

/* IT Calculator Layout */
.calculator-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.calc-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.calc-card h2 {
  font-size: 1.2rem;
  margin-bottom: 20px;
  color: var(--text-main);
}

.calc-results-display {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.result-stat-box {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.result-stat-box .label {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.result-stat-box .val {
  font-size: 1.3rem;
  font-weight: 700;
}

.result-stat-box.highlight {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(6, 182, 212, 0.2));
  border-color: var(--primary);
}

.result-stat-box.highlight .val {
  color: #fff;
  font-size: 1.6rem;
}

/* Modal */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.modal-backdrop.active {
  opacity: 1;
  pointer-events: all;
}

.modal-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 620px;
  padding: 28px;
  box-shadow: var(--shadow-md);
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.close-modal {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Receipt Print Styling */
#receipt-preview {
  background: #ffffff;
  color: #000000;
  padding: 24px;
  border-radius: 8px;
  font-family: monospace;
  max-width: 320px;
  margin: 0 auto;
}
#receipt-preview h2 {
  text-align: center;
  margin-bottom: 8px;
  font-size: 1.2rem;
}
#receipt-preview .line {
  display: flex;
  justify-content: space-between;
  margin: 6px 0;
}

/* Responsive Rules */
@media (max-width: 1024px) {
  .pos-layout {
    grid-template-columns: 1fr;
    height: auto;
  }
  .calculator-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .app-container {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
    height: auto;
    padding: 12px;
  }
  .nav-menu {
    flex-direction: row;
    overflow-x: auto;
  }
}