/* ========== CSS Variables ========== */
:root {
  --primary: #8b5cf6;
  --primary-dark: #7c3aed;
  --primary-light: #a78bfa;
  --secondary: #10b981;
  --secondary-dark: #059669;
  --danger: #ef4444;
  --warning: #f59e0b;
  --info: #3b82f6;

  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-card: #ffffff;

  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;

  --border-color: #e2e8f0;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);

  --sidebar-width: 280px;
  --header-height: 64px;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;

  --transition: all 0.3s ease;
}

/* Dark Mode Variables */
.dark {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --bg-card: #1e293b;

  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --border-color: #334155;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: "Noto Sans Bengali", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg-secondary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  text-decoration: none;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

input,
select,
textarea {
  font-family: inherit;
  font-size: 1rem;
}

/* ========== Utility Classes ========== */
.hidden {
  display: none !important;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: var(--transition);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(139, 92, 246, 0.4);
}

.btn-secondary {
  background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
  color: white;
  box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}

.btn-outline {
  border: 2px solid var(--border-color);
  color: var(--text-primary);
  background: var(--bg-card);
}

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

.btn-danger {
  background: linear-gradient(135deg, var(--danger), #dc2626);
  color: white;
}

.btn-full {
  width: 100%;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.btn-icon {
  padding: 0.5rem;
  width: 40px;
  height: 40px;
}

/* ========== Auth Container ========== */
.auth-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 1rem;
}

.auth-box {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow-lg);
}

.auth-logo {
  text-align: center;
  margin-bottom: 2rem;
}

.auth-logo .logo-icon {
  width: 70px;
  height: 70px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  box-shadow: 0 8px 25px rgba(139, 92, 246, 0.3);
}

.auth-logo .logo-icon i {
  font-size: 2rem;
  color: white;
}

.auth-logo h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
}

.auth-logo p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.auth-form h2 {
  text-align: center;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  color: var(--text-primary);
  transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.1);
}

.auth-switch {
  text-align: center;
  margin-top: 1.5rem;
  color: var(--text-secondary);
}

.auth-switch a {
  color: var(--primary);
  font-weight: 600;
}

.auth-switch a:hover {
  text-decoration: underline;
}

/* ========== Main Container ========== */
.main-container {
  display: flex;
  min-height: 100vh;
}

/* ========== Mobile Header ========== */
.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  padding: 0 1rem;
  align-items: center;
  justify-content: space-between;
  z-index: 100;
  backdrop-filter: blur(10px);
}

.menu-toggle {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  transition: var(--transition);
}

.menu-toggle:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-primary);
}

.header-logo i {
  color: var(--primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.theme-toggle {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--text-secondary);
  transition: var(--transition);
}

.theme-toggle:hover {
  background: var(--bg-tertiary);
}

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
}

/* ========== Sidebar ========== */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--bg-card);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  z-index: 200;
  transition: var(--transition);
}

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

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.sidebar-logo .logo-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}

.sidebar-logo .logo-icon i {
  font-size: 1.25rem;
  color: white;
}

.logo-text h1 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

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

.sidebar-close {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
}

.sidebar-nav {
  flex: 1;
  padding: 1rem;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 1rem;
  border-radius: var(--radius);
  color: var(--text-secondary);
  transition: var(--transition);
  margin-bottom: 0.25rem;
}

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

.nav-item.active {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}

.nav-item i {
  width: 20px;
  text-align: center;
}

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

.theme-toggle-btn {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  transition: var(--transition);
  margin-bottom: 1rem;
}

.theme-toggle-btn:hover {
  background: var(--bg-tertiary);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  background: var(--bg-tertiary);
  border-radius: var(--radius);
}

.user-avatar-lg {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
  flex-shrink: 0;
}

.user-details {
  flex: 1;
  min-width: 0;
}

.user-details p {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-details p:first-child {
  font-weight: 600;
  color: var(--text-primary);
}

.user-details p:last-child {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.logout-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  transition: var(--transition);
}

.logout-btn:hover {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 150;
}

/* ========== Main Content ========== */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: 2rem;
  min-height: 100vh;
}

.page {
  display: none;
  animation: fadeIn 0.3s ease;
}

.page.active {
  display: block;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ========== Page Header ========== */
.page-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.page-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
}

.page-header p {
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

/* ========== Stats Cards ========== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  transform: translate(30%, -30%);
  opacity: 0.1;
}

.stat-card.blue::before {
  background: var(--info);
}
.stat-card.green::before {
  background: var(--secondary);
}
.stat-card.orange::before {
  background: var(--warning);
}
.stat-card.purple::before {
  background: var(--primary);
}

.stat-card .stat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.stat-card .stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.stat-card.blue .stat-icon {
  background: rgba(59, 130, 246, 0.1);
  color: var(--info);
}
.stat-card.green .stat-icon {
  background: rgba(16, 185, 129, 0.1);
  color: var(--secondary);
}
.stat-card.orange .stat-icon {
  background: rgba(245, 158, 11, 0.1);
  color: var(--warning);
}
.stat-card.purple .stat-icon {
  background: rgba(139, 92, 246, 0.1);
  color: var(--primary);
}

.stat-card .stat-title {
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-card .stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
}

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

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

.card-header h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card-header h3 i {
  color: var(--primary);
}

.card-body {
  padding: 1.5rem;
}

/* ========== Tables ========== */
.table-container {
  overflow-x: auto;
}

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

.data-table th,
.data-table td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.data-table th {
  background: var(--bg-tertiary);
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.data-table tr:hover {
  background: var(--bg-secondary);
}

.data-table .text-right {
  text-align: right;
}

.data-table .text-center {
  text-align: center;
}

.data-table .badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-blue {
  background: rgba(59, 130, 246, 0.1);
  color: var(--info);
}
.badge-green {
  background: rgba(16, 185, 129, 0.1);
  color: var(--secondary);
}
.badge-orange {
  background: rgba(245, 158, 11, 0.1);
  color: var(--warning);
}
.badge-red {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
}
.badge-purple {
  background: rgba(139, 92, 246, 0.1);
  color: var(--primary);
}

.action-btns {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
}

.action-btn {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  transition: var(--transition);
}

.action-btn:hover {
  background: var(--bg-tertiary);
}

.action-btn.edit:hover {
  color: var(--warning);
  background: rgba(245, 158, 11, 0.1);
}

.action-btn.delete:hover {
  color: var(--danger);
  background: rgba(239, 68, 68, 0.1);
}

.action-btn.view:hover {
  color: var(--info);
  background: rgba(59, 130, 246, 0.1);
}

/* ========== Filter Bar ========== */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.search-box {
  position: relative;
  flex: 1;
  min-width: 250px;
}

.search-box i {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

.search-box input {
  width: 100%;
  padding: 0.875rem 1rem 0.875rem 2.75rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text-primary);
  transition: var(--transition);
}

.search-box input:focus {
  outline: none;
  border-color: var(--primary);
}

.filter-select {
  min-width: 160px;
}

.filter-select select {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text-primary);
  cursor: pointer;
}

/* ========== Item Cards Grid ========== */
.items-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.item-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: var(--transition);
}

.item-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.item-card .card-accent {
  height: 4px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
}

.item-card.green .card-accent {
  background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
}

.item-card .card-content {
  padding: 1.5rem;
}

.item-card .card-top {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
}

.item-card .item-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}

.item-card.green .item-icon {
  background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
  box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}

.item-card .item-info h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  font-family: monospace;
}

.item-card .item-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.item-card .item-meta {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-top: 0.5rem;
}

.item-card .item-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  padding-top: 1rem;
  margin-top: 1rem;
  border-top: 1px solid var(--border-color);
  text-align: center;
}

.item-card .item-stats .stat {
  padding: 0.5rem;
}

.item-card .item-stats .stat-val {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.item-card .item-stats .stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.item-card .card-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
  opacity: 0;
  transition: var(--transition);
}

.item-card:hover .card-actions {
  opacity: 1;
}

/* ========== Modal ========== */
.modal-container {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1rem;
}

.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
}

.modal {
  position: relative;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 600px;
  max-height: 90vh;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  animation: modalSlide 0.3s ease;
}

@keyframes modalSlide {
  from {
    opacity: 0;
    transform: translateY(-20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

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

.modal-header h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.modal-close {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  transition: var(--transition);
}

.modal-close:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.modal-body {
  padding: 1.5rem;
  overflow-y: auto;
  max-height: calc(90vh - 140px);
}

.modal-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  gap: 1rem;
  justify-content: flex-end;
}

/* ========== Forms in Modal ========== */
.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

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

.input-with-btn {
  display: flex;
  gap: 0.5rem;
}

.input-with-btn input,
.input-with-btn select {
  flex: 1;
}

.total-display {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(167, 139, 250, 0.1));
  border: 2px solid rgba(139, 92, 246, 0.2);
  border-radius: var(--radius);
  padding: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 1rem;
}

.total-display .label {
  color: var(--text-secondary);
  font-weight: 500;
}

.total-display .value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}

/* ========== Toast ========== */
.toast-container {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  box-shadow: var(--shadow-lg);
  border-left: 4px solid;
  animation: toastSlide 0.3s ease;
  min-width: 300px;
}

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

.toast.success {
  border-left-color: var(--secondary);
}

.toast.error {
  border-left-color: var(--danger);
}

.toast.warning {
  border-left-color: var(--warning);
}

.toast.info {
  border-left-color: var(--info);
}

.toast i {
  font-size: 1.25rem;
}

.toast.success i {
  color: var(--secondary);
}
.toast.error i {
  color: var(--danger);
}
.toast.warning i {
  color: var(--warning);
}
.toast.info i {
  color: var(--info);
}

.toast p {
  flex: 1;
  color: var(--text-primary);
}

/* ========== Loading ========== */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(255, 255, 255, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 3000;
}

.dark .loading-overlay {
  background: rgba(15, 23, 42, 0.9);
}

.spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--border-color);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ========== Empty State ========== */
.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--text-muted);
}

.empty-state i {
  font-size: 4rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}

.empty-state p {
  font-size: 1.125rem;
}

/* ========== Chart Container ========== */
.chart-container {
  height: 300px;
  position: relative;
}

/* ========== Summary Cards for Reports ========== */
.summary-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.summary-card {
  padding: 1.25rem;
  border-radius: var(--radius);
  color: white;
  text-align: center;
}

.summary-card.blue {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
}
.summary-card.green {
  background: linear-gradient(135deg, #10b981, #059669);
}
.summary-card.orange {
  background: linear-gradient(135deg, #f59e0b, #d97706);
}
.summary-card.purple {
  background: linear-gradient(135deg, #8b5cf6, #7c3aed);
}

.summary-card .summary-title {
  font-size: 0.875rem;
  opacity: 0.9;
  margin-bottom: 0.5rem;
}

.summary-card .summary-value {
  font-size: 1.75rem;
  font-weight: 700;
}

/* ========== Responsive Design ========== */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-close {
    display: flex;
  }

  .sidebar-overlay.active {
    display: block;
  }

  .mobile-header {
    display: flex;
  }

  .main-content {
    margin-left: 0;
    padding-top: calc(var(--header-height) + 1rem);
  }
}

@media (max-width: 768px) {
  .main-content {
    padding: 1rem;
    padding-top: calc(var(--header-height) + 1rem);
  }

  .page-header {
    flex-direction: column;
    align-items: flex-start;
  }

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

  .filter-bar {
    flex-direction: column;
  }

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

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

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

  .data-table {
    font-size: 0.875rem;
  }

  .data-table th,
  .data-table td {
    padding: 0.75rem;
  }

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

/* ========== Confirmation Dialog ========== */
.confirm-dialog {
  text-align: center;
  padding: 1rem;
}

.confirm-dialog .confirm-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(239, 68, 68, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
}

.confirm-dialog .confirm-icon i {
  font-size: 2rem;
  color: var(--danger);
}

.confirm-dialog h4 {
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.confirm-dialog p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.confirm-dialog .confirm-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
}