/* ==========================================================================
   COFFER STOCK - MODERN COFFEE SHOP INVENTORY SYSTEM
   CSS Design System & Theme Engine (Khmer Typography + Glassmorphism)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Kantumruy+Pro:ital,wght@0,300..700;1,300..700&family=Plus+Jakarta+Sans:wght@400;500;600;700&display=swap');

:root {
  /* Color Palette - Premium Dark Coffee Theme */
  --bg-primary: #12100E;
  --bg-surface: #1C1815;
  --bg-card: rgba(35, 30, 26, 0.85);
  --bg-card-hover: rgba(48, 41, 35, 0.9);
  --bg-glass: rgba(255, 255, 255, 0.03);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(212, 163, 115, 0.25);

  /* Primary & Accent Colors */
  --accent-gold: #D4A373;
  --accent-gold-light: #FAEDCD;
  --accent-green: #2A9D8F;
  --accent-green-bg: rgba(42, 157, 143, 0.15);
  --accent-amber: #E9C46A;
  --accent-amber-bg: rgba(233, 196, 106, 0.15);
  --accent-red: #E76F51;
  --accent-red-bg: rgba(231, 111, 81, 0.15);

  /* Text Colors */
  --text-primary: #F8F9FA;
  --text-secondary: #C5C6D0;
  --text-muted: #8E8E9F;

  /* Typography */
  --font-main: 'Kantumruy Pro', 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-mono: 'Plus Jakarta Sans', monospace;

  /* Shadows & Effects */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
  --shadow-gold: 0 0 20px rgba(212, 163, 115, 0.15);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Theme Variables */
[data-theme="light"] {
  --bg-primary: #F4F1EA;
  --bg-surface: #FFFFFF;
  --bg-card: rgba(255, 255, 255, 0.9);
  --bg-card-hover: #FDFBF7;
  --bg-glass: rgba(0, 0, 0, 0.02);
  --border-color: rgba(0, 0, 0, 0.08);
  --text-primary: #2C1810;
  --text-secondary: #4A3B32;
  --text-muted: #7C6D63;
  --shadow-lg: 0 12px 32px rgba(44, 24, 16, 0.08);
}

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  overflow-x: hidden;
}

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

/* Sidebar Styling */
.sidebar {
  width: 260px;
  background-color: var(--bg-surface);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
  flex-shrink: 0;
  z-index: 100;
}

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

.brand-logo {
  font-size: 2rem;
  filter: drop-shadow(0 0 8px rgba(212, 163, 115, 0.5));
}

.brand-text h1 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent-gold);
  line-height: 1.2;
}

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

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 8px;
  list-style: none;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-fast);
  text-decoration: none;
}

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

.nav-item.active {
  background: linear-gradient(135deg, rgba(212, 163, 115, 0.2), rgba(212, 163, 115, 0.05));
  color: var(--accent-gold);
  border-left: 4px solid var(--accent-gold);
  font-weight: 600;
}

.nav-icon {
  font-size: 1.2rem;
}

.sidebar-footer {
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Main Content Area */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow-y: auto;
}

/* Header */
.top-header {
  height: 70px;
  padding: 0 32px;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  sticky: top;
  top: 0;
  z-index: 50;
}

.header-title h2 {
  font-size: 1.3rem;
  font-weight: 700;
}

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

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

.btn-primary {
  background: linear-gradient(135deg, var(--accent-gold), #b88653);
  color: #12100E;
  box-shadow: 0 4px 12px rgba(212, 163, 115, 0.3);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(212, 163, 115, 0.4);
}

.btn-secondary {
  background: var(--bg-glass);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--accent-gold);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.btn-outline:hover {
  color: var(--text-primary);
  border-color: var(--accent-gold);
}

.btn-danger {
  background-color: var(--accent-red-bg);
  color: var(--accent-red);
  border: 1px solid var(--accent-red);
}

.btn-danger:hover {
  background-color: var(--accent-red);
  color: white;
}

.btn-icon {
  padding: 6px 10px;
  font-size: 0.82rem;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  background: var(--bg-surface);
  color: var(--text-primary);
  cursor: pointer;
}

.btn-icon:hover {
  background: var(--accent-gold);
  color: black;
}

/* Page Containers */
.page-container {
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.tab-page {
  display: none;
}

.tab-page.active {
  display: flex;
  flex-direction: column;
  gap: 28px;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Low Stock Alert Banner */
.alert-banner {
  background: linear-gradient(135deg, rgba(231, 111, 81, 0.2), rgba(233, 196, 106, 0.15));
  border: 1px solid var(--accent-red);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: 0 4px 20px rgba(231, 111, 81, 0.15);
}

.alert-icon {
  font-size: 1.8rem;
}

.alert-content h4 {
  color: var(--accent-red);
  font-size: 1rem;
  font-weight: 700;
}

.alert-content p {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.hidden {
  display: none !important;
}

/* KPI Stat Cards Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.stat-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

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

.stat-icon-wrapper {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.icon-gold { background: rgba(212, 163, 115, 0.15); color: var(--accent-gold); }
.icon-amber { background: var(--accent-amber-bg); color: var(--accent-amber); }
.icon-red { background: var(--accent-red-bg); color: var(--accent-red); }
.icon-green { background: var(--accent-green-bg); color: var(--accent-green); }

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

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  margin-top: 2px;
}

.stat-subtext {
  font-size: 0.78rem;
  color: var(--accent-gold);
  margin-top: 2px;
}

/* Charts Section */
.charts-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

@media (max-width: 1024px) {
  .charts-grid { grid-template-columns: 1fr; }
}

.chart-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
}

.chart-header {
  margin-bottom: 20px;
}

.chart-header h3 {
  font-size: 1.05rem;
  font-weight: 700;
}

.chart-container {
  position: relative;
  height: 280px;
  width: 100%;
}

/* Table Controls Toolbar */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  background: var(--bg-card);
  padding: 16px 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.search-box {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  min-width: 280px;
}

.search-box input {
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 0.9rem;
  outline: none;
  width: 100%;
}

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

.select-input {
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-family: var(--font-main);
  font-size: 0.9rem;
  outline: none;
}

/* Data Tables */
.table-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.table-responsive {
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.92rem;
}

.data-table th {
  background: rgba(0, 0, 0, 0.2);
  padding: 16px 20px;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.data-table td {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border-color);
  vertical-align: middle;
}

.data-table tbody tr {
  transition: var(--transition-fast);
}

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

.row-low-stock {
  background-color: rgba(231, 111, 81, 0.06) !important;
}

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

.item-emoji {
  font-size: 1.6rem;
}

.item-title {
  font-weight: 600;
  color: var(--text-primary);
}

.item-subtitle {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.category-pill {
  display: inline-block;
  padding: 4px 10px;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  font-size: 0.8rem;
  color: var(--accent-gold);
}

.qty-num {
  font-size: 1.05rem;
  color: var(--accent-gold-light);
}

.min-alert-text {
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* Badges */
.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 600;
}

.badge-success { background: var(--accent-green-bg); color: var(--accent-green); border: 1px solid var(--accent-green); }
.badge-warning { background: var(--accent-amber-bg); color: var(--accent-amber); border: 1px solid var(--accent-amber); }
.badge-danger { background: var(--accent-red-bg); color: var(--accent-red); border: 1px solid var(--accent-red); }
.badge-neutral { background: rgba(255,255,255,0.08); color: var(--text-secondary); }

/* Recipes Grid */
.recipes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.recipe-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: var(--transition-fast);
}

.recipe-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-gold);
}

.recipe-header {
  display: flex;
  align-items: center;
  gap: 14px;
}

.recipe-emoji {
  font-size: 2.2rem;
}

.recipe-title {
  font-size: 1.1rem;
  font-weight: 700;
}

.recipe-price {
  font-size: 0.88rem;
  color: var(--accent-gold);
  font-weight: 600;
}

.recipe-ingredients-title {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 600;
}

.recipe-ingredients-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: rgba(0,0,0,0.2);
  padding: 12px;
  border-radius: var(--radius-sm);
}

.ing-item {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
}

.ing-low {
  color: var(--accent-red);
  font-weight: 600;
}

.recipe-actions {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* Modals */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition-fast);
}

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

.modal-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 520px;
  padding: 28px;
  box-shadow: var(--shadow-lg);
  transform: translateY(20px);
  transition: var(--transition-fast);
}

.modal-backdrop.active .modal-card {
  transform: translateY(0);
}

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

.modal-header h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent-gold);
}

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

.modal-close:hover {
  color: var(--accent-red);
}

.form-group {
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.88rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.form-control {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 0.92rem;
  outline: none;
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* Toast Container */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 2000;
}

.toast {
  background: var(--bg-surface);
  border-left: 4px solid var(--accent-gold);
  box-shadow: var(--shadow-lg);
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 280px;
  animation: slideInRight 0.3s ease;
}

.toast-success { border-left-color: var(--accent-green); }
.toast-danger { border-left-color: var(--accent-red); }
.toast-warning { border-left-color: var(--accent-amber); }

.toast-close {
  margin-left: auto;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
}

@keyframes slideInRight {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

.fade-out {
  opacity: 0;
  transform: translateY(10px);
  transition: 0.4s ease;
}

/* Utilities */
.font-mono { font-family: var(--font-mono); }
.text-gold { color: var(--accent-gold); }
.text-accent { color: var(--accent-green); }
.text-muted { color: var(--text-muted); }
.text-center { text-align: center; }
.py-4 { padding-top: 1rem; padding-bottom: 1rem; }