/* ============================================
   ULTRA-MODERN DESIGN SYSTEM v2.0
   Professional, Contemporary UI Enhancement
   ============================================ */

/* === COLOR PALETTE & VARIABLES === */
:root {
  /* Advanced Color System */
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --secondary: #8b5cf6;
  --accent: #06b6d4;
  --success: #10b981;
  --success-light: #34d399;
  --warning: #f59e0b;
  --warning-light: #fbbf24;
  --danger: #ef4444;
  --danger-light: #f87171;
  --info: #3b82f6;
  
  /* Neutrals */
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  
  /* Semantic Colors */
  --bg-page: #f8fafc;
  --surface: #ffffff;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  
  /* Glass Morphism */
  --glass-bg: rgba(255, 255, 255, 0.9);
  --glass-border: rgba(255, 255, 255, 0.4);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  
  /* Spacing & Effects */
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 6px 16px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 32px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 20px 48px rgba(0, 0, 0, 0.15);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s ease;
}

/* === GLOBAL ENHANCEMENTS === */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--primary-light) var(--gray-200);
}

*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-track { background: var(--gray-100); border-radius: 10px; }
*::-webkit-scrollbar-thumb { 
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 10px;
  border: 2px solid var(--gray-100);
}
*::-webkit-scrollbar-thumb:hover { background: var(--primary-dark); }

body {
  background: var(--bg-page);
  color: var(--text-primary);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* === ENHANCED NAVBAR === */
.navbar {
  background: var(--glass-bg) !important;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(226, 232, 240, 0.6);
  box-shadow: var(--shadow);
  padding: 0.875rem 0;
  position: sticky;
  top: 0;
  z-index: 1030;
}

.navbar-brand {
  font-weight: 700;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
  transition: var(--transition);
}

.navbar-brand:hover {
  transform: scale(1.03);
}

.navbar .btn {
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.875rem;
  padding: 0.5rem 1.1rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.navbar .btn::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.navbar .btn:active::after {
  width: 300px;
  height: 300px;
}

.navbar .btn.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary)) !important;
  color: #ffffff !important;
  border: none !important;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
}

.navbar .btn.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.45);
}

.navbar .btn.btn-success {
  background: linear-gradient(135deg, var(--success), var(--success-light)) !important;
  color: #ffffff !important;
  border: none !important;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.35);
}

.navbar .btn.btn-success:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.45);
}

.navbar .btn.btn-danger {
  background: linear-gradient(135deg, var(--danger), var(--danger-light)) !important;
  color: #ffffff !important;
  border: none !important;
  box-shadow: 0 4px 14px rgba(239, 68, 68, 0.35);
}

.navbar .btn.btn-danger:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(239, 68, 68, 0.45);
}

.navbar .btn.btn-outline-secondary {
  background: rgba(255, 255, 255, 0.7) !important;
  border: 1.5px solid rgba(148, 163, 184, 0.3) !important;
  color: var(--text-primary) !important;
}

.navbar .btn.btn-outline-secondary:hover {
  background: rgba(255, 255, 255, 1) !important;
  border-color: var(--primary) !important;
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

/* === MODERN CARDS === */
.card {
  border-radius: var(--radius-lg) !important;
  border: 1px solid rgba(226, 232, 240, 0.7) !important;
  background: var(--surface) !important;
  box-shadow: var(--shadow) !important;
  transition: var(--transition) !important;
  overflow: hidden;
  position: relative;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
  opacity: 0;
  transition: var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-xl) !important;
  transform: translateY(-4px);
  border-color: rgba(99, 102, 241, 0.3) !important;
}

.card:hover::before {
  opacity: 1;
}

.card-header {
  background: linear-gradient(135deg, rgba(99,102,241,0.08), rgba(139,92,246,0.05)) !important;
  border-bottom: 1px solid rgba(226, 232, 240, 0.7) !important;
  color: var(--text-primary) !important;
  font-size: 1.125rem !important;
  font-weight: 700 !important;
  padding: 1.25rem 1.5rem !important;
  letter-spacing: -0.01em;
  backdrop-filter: blur(10px);
}

.card-body {
  padding: 1.5rem !important;
}

/* === ENHANCED BUTTONS === */
.btn {
  border-radius: var(--radius) !important;
  font-weight: 600 !important;
  padding: 0.65rem 1.3rem !important;
  transition: var(--transition) !important;
  position: relative;
  overflow: hidden;
}

.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:active::before {
  width: 300px;
  height: 300px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary)) !important;
  border: none !important;
  color: #ffffff !important;
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(99, 102, 241, 0.4);
  filter: brightness(1.05);
}

.btn-success {
  background: linear-gradient(135deg, var(--success), var(--success-light)) !important;
  border: none !important;
  color: #ffffff !important;
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.3);
}

.btn-success:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(16, 185, 129, 0.4);
  filter: brightness(1.05);
}

.btn-outline-primary {
  background: rgba(99, 102, 241, 0.06) !important;
  border: 2px solid var(--primary) !important;
  color: var(--primary) !important;
}

.btn-outline-primary:hover {
  background: var(--primary) !important;
  color: #ffffff !important;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.35);
}

.btn-outline-secondary {
  background: rgba(148, 163, 184, 0.06) !important;
  border: 2px solid var(--gray-300) !important;
  color: var(--text-primary) !important;
}

.btn-outline-secondary:hover {
  background: var(--gray-100) !important;
  border-color: var(--primary) !important;
  color: var(--primary) !important;
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn-outline-warning {
  background: rgba(245, 158, 11, 0.06) !important;
  border: 2px solid var(--warning) !important;
  color: var(--warning) !important;
}

.btn-outline-warning:hover {
  background: var(--warning) !important;
  color: #ffffff !important;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.35);
}

.btn-outline-danger {
  background: rgba(239, 68, 68, 0.06) !important;
  border: 2px solid var(--danger) !important;
  color: var(--danger) !important;
}

.btn-outline-danger:hover {
  background: var(--danger) !important;
  color: #ffffff !important;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(239, 68, 68, 0.35);
}

.btn-outline-dark {
  background: rgba(71, 85, 105, 0.06) !important;
  border: 2px solid var(--gray-600) !important;
  color: var(--gray-700) !important;
}

.btn-outline-dark:hover {
  background: var(--gray-700) !important;
  color: #ffffff !important;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(71, 85, 105, 0.35);
}

/* === MODERN TABLES === */
.table {
  border-collapse: separate;
  border-spacing: 0;
}

.table thead th {
  background: linear-gradient(135deg, rgba(99,102,241,0.1), rgba(139,92,246,0.06)) !important;
  color: var(--text-primary) !important;
  font-weight: 700 !important;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.75rem !important;
  padding: 1rem 1.25rem !important;
  border: none !important;
  white-space: nowrap;
}

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

.table tbody tr:hover {
  background: linear-gradient(90deg, rgba(99,102,241,0.05), rgba(139,92,246,0.03)) !important;
  transform: translateX(2px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.table td {
  padding: 1rem 1.25rem !important;
  border-color: rgba(226, 232, 240, 0.6) !important;
  vertical-align: middle !important;
}

.table-striped > tbody > tr:nth-of-type(odd) {
  background-color: rgba(99, 102, 241, 0.02) !important;
}

/* === MODERN BADGES === */
.badge {
  padding: 0.5rem 1rem !important;
  border-radius: var(--radius-sm) !important;
  font-weight: 600 !important;
  font-size: 0.75rem !important;
  letter-spacing: 0.03em;
  display: inline-flex !important;
  align-items: center;
  gap: 0.375rem;
}

.badge-success, .text-bg-success {
  background: linear-gradient(135deg, var(--success), var(--success-light)) !important;
  color: #ffffff !important;
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

.badge-warning, .text-bg-warning {
  background: linear-gradient(135deg, var(--warning), var(--warning-light)) !important;
  color: #78350f !important;
  box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3);
}

.badge-danger, .text-bg-danger {
  background: linear-gradient(135deg, var(--danger), var(--danger-light)) !important;
  color: #ffffff !important;
  box-shadow: 0 2px 8px rgba(239, 68, 68, 0.3);
}

.badge-secondary, .text-bg-secondary {
  background: linear-gradient(135deg, var(--gray-400), var(--gray-300)) !important;
  color: var(--gray-800) !important;
  box-shadow: 0 2px 8px rgba(148, 163, 184, 0.3);
}

.badge-info, .text-bg-info {
  background: linear-gradient(135deg, var(--accent), #22d3ee) !important;
  color: #ffffff !important;
  box-shadow: 0 2px 8px rgba(6, 182, 212, 0.3);
}

/* === FORM CONTROLS === */
input, select, textarea {
  border-radius: var(--radius) !important;
  border: 2px solid var(--gray-200) !important;
  padding: 0.75rem 1rem !important;
  transition: var(--transition) !important;
  font-size: 0.9375rem !important;
}

input:hover, select:hover, textarea:hover {
  border-color: rgba(99, 102, 241, 0.4) !important;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--primary) !important;
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1) !important;
  outline: none !important;
  transform: translateY(-1px);
}

.form-label {
  color: var(--text-primary) !important;
  font-weight: 600 !important;
  font-size: 0.875rem !important;
  margin-bottom: 0.5rem !important;
  letter-spacing: 0.01em;
}

.input-group-text {
  background: linear-gradient(135deg, rgba(99,102,241,0.08), rgba(139,92,246,0.05)) !important;
  border: 2px solid var(--gray-200) !important;
  color: var(--text-primary) !important;
  font-weight: 600 !important;
  border-radius: var(--radius) !important;
}

/* === ALERTS === */
.alert {
  border-radius: var(--radius-lg) !important;
  padding: 1.25rem 1.5rem !important;
  border: none !important;
  font-weight: 500;
  box-shadow: var(--shadow) !important;
}

.alert-success {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.12), rgba(52, 211, 153, 0.08)) !important;
  color: #065f46 !important;
  border-left: 4px solid var(--success) !important;
}

.alert-danger {
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.12), rgba(248, 113, 113, 0.08)) !important;
  color: #7f1d1d !important;
  border-left: 4px solid var(--danger) !important;
}

.alert-info {
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.12), rgba(34, 211, 238, 0.08)) !important;
  color: #155e75 !important;
  border-left: 4px solid var(--accent) !important;
}

.alert-warning {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.12), rgba(251, 191, 36, 0.08)) !important;
  color: #78350f !important;
  border-left: 4px solid var(--warning) !important;
}

/* === ENHANCED ECO ICON === */
.eco-icon {
  display: inline-block;
  width: 28px !important;
  height: 28px !important;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary)) !important;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4) !important;
  animation: pulse-glow 3s infinite;
}

@keyframes pulse-glow {
  0%, 100% { transform: scale(1); box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4); }
  50% { transform: scale(1.08); box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6); }
}

/* === POS MODERN ENHANCEMENTS === */
#productsGrid .card {
  cursor: pointer;
  transition: var(--transition);
  background: linear-gradient(135deg, rgba(255,255,255,0.95), rgba(248,250,252,0.9));
}

#productsGrid .card:hover {
  transform: translateY(-6px) scale(1.02);
  box-shadow: var(--shadow-lg);
}

#categoryPills .btn {
  margin-bottom: 0.5rem;
  box-shadow: var(--shadow-sm);
}

#categoryPills .btn.btn-success {
  background: linear-gradient(135deg, var(--primary), var(--secondary)) !important;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.35);
}

#cartLines .border {
  border-radius: var(--radius) !important;
  border: 2px solid var(--gray-200) !important;
  transition: var(--transition);
  background: var(--gray-50);
}

#cartLines .border:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
  background: #ffffff;
}

/* === REPORT TILES === */
.report-tile {
  border-radius: var(--radius-lg) !important;
  padding: 1.5rem !important;
  background: linear-gradient(135deg, rgba(255,255,255,0.95), rgba(248,250,252,0.9)) !important;
  box-shadow: var(--shadow) !important;
  transition: var(--transition) !important;
  border: 1px solid rgba(226, 232, 240, 0.6);
}

.report-tile:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg) !important;
  border-color: rgba(99, 102, 241, 0.3);
}

.rt-icon {
  width: 50px !important;
  height: 50px !important;
  border-radius: var(--radius) !important;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px !important;
  box-shadow: var(--shadow-sm);
}

.rt-metric {
  font-size: 2rem !important;
  background: linear-gradient(135deg, var(--success), var(--success-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 800 !important;
  margin-top: 0.5rem;
}

.rt-title {
  font-weight: 700 !important;
  color: var(--text-primary);
  font-size: 0.95rem;
}

/* === DASHBOARD ENHANCEMENTS === */
.display-6 {
  background: linear-gradient(135deg, var(--success), var(--success-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 800 !important;
}

.text-center.h-100 .card {
  transition: var(--transition);
}

.text-center.h-100 .card:hover {
  transform: translateY(-8px) scale(1.03);
  box-shadow: var(--shadow-xl);
}

/* === UTILITY CLASSES === */
.container, .container-fluid {
  padding-top: 2rem;
  padding-bottom: 2rem;
}

.text-gradient {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.glass-card {
  background: var(--glass-bg) !important;
  backdrop-filter: blur(20px) !important;
  -webkit-backdrop-filter: blur(20px) !important;
  border: 1px solid var(--glass-border) !important;
}

/* === RESPONSIVE ADJUSTMENTS === */
@media (max-width: 768px) {
  .navbar .btn {
    font-size: 0.75rem;
    padding: 0.4rem 0.8rem !important;
  }
  
  .card-header {
    font-size: 1rem !important;
    padding: 1rem !important;
  }
  
  .card-body {
    padding: 1rem !important;
  }
  
  .report-tile {
    padding: 1rem !important;
  }
  
  .rt-metric {
    font-size: 1.5rem !important;
  }
}

/* === LOADING STATES === */
@keyframes shimmer {
  0% { background-position: -1000px 0; }
  100% { background-position: 1000px 0; }
}

.loading-skeleton {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 1000px 100%;
  animation: shimmer 2s infinite;
}

/* === PRINT STYLES === */
@media print {
  .navbar, .btn, .alert { display: none !important; }
  .card { box-shadow: none !important; border: 1px solid #ddd !important; }
}