/* Modern UI Design System - BigBest Admin Panel */

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

:root {
  /* Primary Colors */
  --primary-color: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --primary-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  
  /* Status Colors */
  --success-color: #10b981;
  --success-light: #34d399;
  --warning-color: #f59e0b;
  --warning-light: #fbbf24;
  --danger-color: #ef4444;
  --danger-light: #f87171;
  --info-color: #3b82f6;
  --info-light: #60a5fa;
  
  /* Neutral Colors */
  --dark-color: #1e293b;
  --dark-light: #334155;
  --light-color: #f8fafc;
  --white: #ffffff;
  --border-color: #e2e8f0;
  --border-light: #f1f5f9;
  
  /* Text Colors */
  --text-primary: #0f172a;
  --text-secondary: #64748b;
  --text-light: #94a3b8;
  --text-white: #ffffff;
  
  /* Layout */
  --sidebar-width: 280px;
  --header-height: 72px;
  --border-radius: 12px;
  --border-radius-sm: 8px;
  --border-radius-lg: 16px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Transitions */
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf1 100%);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Layout */
.container-fluid {
  display: flex;
  min-height: 100vh;
}

/* Sidebar - Modern Design */
.sidebar {
  width: var(--sidebar-width);
  background: linear-gradient(180deg, #1e293b 0%, #0f172a 100%);
  color: var(--text-white);
  position: fixed;
  height: 100vh;
  overflow-y: auto;
  overflow-x: hidden;
  z-index: 1000;
  transition: var(--transition);
  box-shadow: var(--shadow-lg);
}

.sidebar::-webkit-scrollbar {
  width: 6px;
}

.sidebar::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.05);
}

.sidebar::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
  border-radius: 3px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.3);
}

.sidebar-header {
  padding: 1.75rem 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.03);
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-white);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  transition: var(--transition-fast);
}

.logo:hover {
  opacity: 0.9;
  transform: translateX(2px);
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--primary-gradient);
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.125rem;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.logo:hover .logo-icon {
  transform: scale(1.05);
  box-shadow: var(--shadow-lg);
}

.sidebar-nav {
  padding: 1.25rem 0;
}

.nav-section-title {
  padding: 1rem 1.5rem 0.75rem;
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.4);
  font-weight: 700;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  padding: 0.875rem 1.5rem;
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: var(--transition);
  border-left: 3px solid transparent;
  margin: 0.125rem 0;
  position: relative;
  font-weight: 500;
}

.nav-link::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 0;
  background: var(--primary-gradient);
  transition: var(--transition);
  border-radius: 0 4px 4px 0;
}

.nav-link:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-white);
  padding-left: 1.75rem;
}

.nav-link:hover::before {
  width: 3px;
}

.nav-link.active {
  background: rgba(99, 102, 241, 0.15);
  color: var(--text-white);
  border-left-color: var(--primary-color);
  font-weight: 600;
}

.nav-link.active::before {
  width: 3px;
  background: var(--primary-color);
}

.nav-icon {
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  transition: var(--transition-fast);
}

.nav-link:hover .nav-icon {
  transform: scale(1.1);
}

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

/* Header - Modern Sticky Header */
.header {
  background: var(--white);
  height: var(--header-height);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2.5rem;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.95);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.page-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.search-box {
  position: relative;
}

.search-box input {
  padding: 0.625rem 1rem 0.625rem 2.75rem;
  border: 1.5px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  width: 320px;
  font-size: 0.875rem;
  background: var(--light-color);
  transition: var(--transition);
}

.search-box input:focus {
  outline: none;
  border-color: var(--primary-color);
  background: var(--white);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
  width: 360px;
}

.search-box .search-icon {
  position: absolute;
  left: 0.875rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-secondary);
  font-size: 1rem;
  pointer-events: none;
}

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

.icon-btn {
  width: 44px;
  height: 44px;
  border-radius: var(--border-radius-sm);
  border: none;
  background: var(--light-color);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  color: var(--text-secondary);
  font-size: 1.125rem;
  position: relative;
}

.icon-btn::after {
  content: '';
  position: absolute;
  top: 6px;
  right: 6px;
  width: 8px;
  height: 8px;
  background: var(--danger-color);
  border-radius: 50%;
  opacity: 0;
  transition: var(--transition);
}

.icon-btn:hover {
  background: var(--primary-color);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.user-menu {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  padding: 0.5rem 0.75rem;
  border-radius: var(--border-radius-sm);
  transition: var(--transition);
  margin-left: 0.5rem;
}

.user-menu:hover {
  background: var(--light-color);
}

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-weight: 700;
  font-size: 1rem;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.user-menu:hover .user-avatar {
  transform: scale(1.05);
  box-shadow: var(--shadow-md);
}

/* Content Area */
.content {
  padding: 2.5rem;
}

/* Cards - Modern Design */
.card {
  background: var(--white);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
  padding: 2rem;
  margin-bottom: 1.5rem;
  transition: var(--transition);
  border: 1px solid var(--border-light);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  padding-bottom: 1.25rem;
  border-bottom: 2px solid var(--border-light);
}

.card-title {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

/* Stats Cards - Enhanced */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--white);
  border-radius: var(--border-radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--border-light);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--primary-gradient);
  transform: scaleX(0);
  transition: var(--transition);
}

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

.stat-card:hover::before {
  transform: scaleX(1);
}

.stat-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
}

.stat-title {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  transition: var(--transition);
}

.stat-card:hover .stat-icon {
  transform: scale(1.1) rotate(5deg);
}

.stat-icon.primary {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
  color: var(--primary-color);
}

.stat-icon.success {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(52, 211, 153, 0.1) 100%);
  color: var(--success-color);
}

.stat-icon.warning {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.1) 0%, rgba(251, 191, 36, 0.1) 100%);
  color: var(--warning-color);
}

.stat-icon.danger {
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.1) 0%, rgba(248, 113, 113, 0.1) 100%);
  color: var(--danger-color);
}

.stat-value {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-change {
  font-size: 0.8125rem;
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-weight: 600;
}

.stat-change.positive {
  color: var(--success-color);
}

.stat-change.negative {
  color: var(--danger-color);
}

/* Tables - Modern Design */
.table-container {
  overflow-x: auto;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-light);
}

.table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
}

.table thead {
  background: linear-gradient(135deg, var(--light-color) 0%, var(--border-light) 100%);
}

.table th {
  padding: 1.25rem 1rem;
  text-align: left;
  font-weight: 700;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border-bottom: 2px solid var(--border-color);
}

.table td {
  padding: 1.25rem 1rem;
  border-top: 1px solid var(--border-light);
  color: var(--text-primary);
  font-size: 0.875rem;
}

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

.table tbody tr:hover {
  background: linear-gradient(90deg, var(--light-color) 0%, transparent 100%);
  transform: scale(1.01);
}

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

/* Badges - Enhanced */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.375rem 0.875rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.025em;
  text-transform: uppercase;
  transition: var(--transition-fast);
}

.badge:hover {
  transform: scale(1.05);
}

.badge-success {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15) 0%, rgba(52, 211, 153, 0.15) 100%);
  color: var(--success-color);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.badge-warning {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.15) 0%, rgba(251, 191, 36, 0.15) 100%);
  color: var(--warning-color);
  border: 1px solid rgba(245, 158, 11, 0.2);
}

.badge-danger {
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.15) 0%, rgba(248, 113, 113, 0.15) 100%);
  color: var(--danger-color);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.badge-info {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.15) 0%, rgba(139, 92, 246, 0.15) 100%);
  color: var(--primary-color);
  border: 1px solid rgba(99, 102, 241, 0.2);
}

.badge-secondary {
  background: var(--light-color);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

/* Buttons - Modern Design */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius-sm);
  font-weight: 600;
  font-size: 0.875rem;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  position: relative;
  overflow: hidden;
  letter-spacing: 0.025em;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--primary-gradient);
  color: var(--white);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.btn-success {
  background: linear-gradient(135deg, var(--success-color) 0%, var(--success-light) 100%);
  color: var(--white);
  box-shadow: var(--shadow-md);
}

.btn-success:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.btn-danger {
  background: linear-gradient(135deg, var(--danger-color) 0%, var(--danger-light) 100%);
  color: var(--white);
  box-shadow: var(--shadow-md);
}

.btn-danger:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.btn-secondary {
  background: var(--white);
  color: var(--text-primary);
  border: 2px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: var(--light-color);
  border-color: var(--primary-color);
  color: var(--primary-color);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.8125rem;
}

/* Forms - Modern Design */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  margin-bottom: 0.625rem;
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.875rem;
  letter-spacing: 0.025em;
}

.form-control {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  font-size: 0.875rem;
  transition: var(--transition);
  background: var(--white);
  font-family: inherit;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
  background: var(--white);
}

.form-control::placeholder {
  color: var(--text-light);
}

.form-select {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  font-size: 0.875rem;
  background: var(--white);
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3E%3Cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 1.5em 1.5em;
  padding-right: 2.5rem;
}

.form-select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

textarea.form-control {
  min-height: 120px;
  resize: vertical;
  font-family: inherit;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

/* Action Buttons - Enhanced */
.action-buttons {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.action-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--border-radius-sm);
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  background: var(--light-color);
  font-size: 1rem;
  text-decoration: none;
}

.action-btn:hover {
  transform: translateY(-2px) scale(1.05);
  box-shadow: var(--shadow-md);
}

.action-btn.edit {
  color: var(--primary-color);
  background: rgba(99, 102, 241, 0.1);
}

.action-btn.edit:hover {
  background: var(--primary-color);
  color: var(--white);
}

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

.action-btn.delete:hover {
  background: var(--danger-color);
  color: var(--white);
}

.action-btn.view {
  color: var(--success-color);
  background: rgba(16, 185, 129, 0.1);
}

.action-btn.view:hover {
  background: var(--success-color);
  color: var(--white);
}

/* Grid Layout */
.grid {
  display: grid;
  gap: 1.5rem;
}

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

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* Loading States */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(99, 102, 241, 0.3);
  border-radius: 50%;
  border-top-color: var(--primary-color);
  animation: spin 1s ease-in-out infinite;
}

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

/* Empty State */
.empty-state {
  text-align: center;
  padding: 4rem 1rem;
  color: var(--text-secondary);
}

.empty-state-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 1.5rem;
  background: linear-gradient(135deg, var(--light-color) 0%, var(--border-light) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  box-shadow: var(--shadow-md);
}

/* Responsive Design */
@media (max-width: 1024px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }
  
  .sidebar.active {
    transform: translateX(0);
  }

  .main-content {
    margin-left: 0;
  }

  .header {
    padding: 0 1.5rem;
  }

  .page-title {
    font-size: 1.5rem;
  }

  .search-box input {
    width: 200px;
  }

  .search-box input:focus {
    width: 240px;
  }

  .content {
    padding: 1.5rem;
  }

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

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .card {
    padding: 1.5rem;
  }

  .table-container {
    font-size: 0.8125rem;
  }

  .table th,
  .table td {
    padding: 0.75rem 0.5rem;
  }
}

@media (max-width: 480px) {
  .header {
    flex-direction: column;
    height: auto;
    padding: 1rem;
    gap: 1rem;
  }

  .header-left,
  .header-right {
    width: 100%;
    justify-content: space-between;
  }

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

  .content {
    padding: 1rem;
  }
}

/* Print Styles */
@media print {
  .sidebar,
  .header,
  .btn,
  .action-buttons {
    display: none;
  }

  .main-content {
    margin-left: 0;
  }

  .card {
    box-shadow: none;
    border: 1px solid #ddd;
  }
}