/* ===================================
   MODERN DARK THEME WITH BLUE ACCENTS
   =================================== */

:root {
  /* Dark Theme Colors */
  --dark-bg-primary: #0a0e27;
  --dark-bg-secondary: #141b2d;
  --dark-bg-tertiary: #1a2332;
  --dark-bg-card: rgba(20, 27, 45, 0.8);
  --dark-bg-card-hover: rgba(26, 35, 50, 0.9);
  
  /* Blue Accent Colors */
  --accent-blue-primary: #3b82f6;
  --accent-blue-secondary: #60a5fa;
  --accent-blue-dark: #2563eb;
  --accent-blue-light: #93c5fd;
  --accent-blue-glow: rgba(59, 130, 246, 0.3);
  
  /* Text Colors */
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-white: #ffffff;
  
  /* Border & Divider */
  --border-color: rgba(148, 163, 184, 0.1);
  --border-color-light: rgba(148, 163, 184, 0.05);
  
  /* Shadows & Glows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --glow-blue: 0 0 20px var(--accent-blue-glow);
  --glow-blue-strong: 0 0 30px rgba(59, 130, 246, 0.5);
  
  /* Blur Effects */
  --blur-sm: blur(8px);
  --blur-md: blur(12px);
  --blur-lg: blur(16px);
}

/* ===================================
   GLOBAL STYLES
   =================================== */

body.dark-theme {
  background: linear-gradient(135deg, #0a0e27 0%, #141b2d 50%, #1a2332 100%);
  background-attachment: fixed;
  color: var(--text-primary);
  font-family: 'Poppins', sans-serif;
  min-height: 100vh;
}

/* Animated Background Pattern */
body.dark-theme::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(59, 130, 246, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 40% 20%, rgba(96, 165, 250, 0.03) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

/* ===================================
   HEADER STYLES
   =================================== */

body.dark-theme #header {
  background: var(--dark-bg-card) !important;
  backdrop-filter: var(--blur-md);
  -webkit-backdrop-filter: var(--blur-md);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  transition: all 0.3s ease;
}

body.dark-theme #header .logo span {
  color: var(--text-white);
  font-weight: 600;
  text-shadow: var(--glow-blue);
}

body.dark-theme #header .logo img {
  filter: drop-shadow(0 0 10px var(--accent-blue-glow));
}

/* Search Bar */
body.dark-theme .search-bar {
  background: var(--dark-bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  transition: all 0.3s ease;
}

.search-bar:focus-within {
  border-color: var(--accent-blue-primary);
  box-shadow: var(--glow-blue);
}

.search-bar input {
  background: transparent;
  color: var(--text-primary);
  border: none;
}

.search-bar input::placeholder {
  color: var(--text-muted);
}

.search-bar button {
  background: var(--accent-blue-primary);
  color: white;
  border: none;
  border-radius: 50%;
  transition: all 0.3s ease;
}

.search-bar button:hover {
  background: var(--accent-blue-dark);
  box-shadow: var(--glow-blue-strong);
  transform: scale(1.05);
}

/* Header Navigation */
.header-nav .nav-icon {
  color: var(--text-secondary);
  background: var(--dark-bg-tertiary);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.header-nav .nav-icon:hover {
  color: var(--accent-blue-primary);
  background: var(--dark-bg-secondary);
  box-shadow: var(--glow-blue);
  transform: translateY(-2px);
}

.header-nav .badge {
  background: var(--accent-blue-primary) !important;
  box-shadow: var(--glow-blue);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

/* Dropdown Menus */
.dropdown-menu {
  background: var(--dark-bg-card) !important;
  backdrop-filter: var(--blur-md);
  -webkit-backdrop-filter: var(--blur-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  border-radius: 12px;
  padding: 0.5rem;
}

.dropdown-item {
  color: var(--text-primary) !important;
  border-radius: 8px;
  transition: all 0.3s ease;
  margin: 2px 0;
}

.dropdown-item:hover {
  background: var(--dark-bg-tertiary) !important;
  color: var(--accent-blue-primary) !important;
  transform: translateX(5px);
}

.dropdown-header {
  color: var(--text-secondary) !important;
  border-bottom: 1px solid var(--border-color);
}

.dropdown-divider {
  border-color: var(--border-color);
}

/* Notification & Message Items */
.notification-item, .message-item {
  padding: 1rem;
  border-radius: 8px;
  transition: all 0.3s ease;
}

.notification-item:hover, .message-item:hover {
  background: var(--dark-bg-tertiary);
  transform: translateX(5px);
}

.notification-item h4, .message-item h4 {
  color: var(--text-primary);
  font-size: 0.9rem;
}

.notification-item p, .message-item p {
  color: var(--text-secondary);
  font-size: 0.8rem;
}

/* Profile Image */
.nav-profile img {
  border: 2px solid var(--accent-blue-primary);
  box-shadow: var(--glow-blue);
}

/* ===================================
   SIDEBAR STYLES
   =================================== */

#sidebar {
  background: var(--dark-bg-card) !important;
  backdrop-filter: var(--blur-md);
  -webkit-backdrop-filter: var(--blur-md);
  border-right: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
}

.sidebar-nav .nav-link {
  color: var(--text-secondary);
  background: transparent;
  border-radius: 12px;
  margin: 4px 8px;
  padding: 12px 16px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.sidebar-nav .nav-link::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 3px;
  background: var(--accent-blue-primary);
  transform: scaleY(0);
  transition: transform 0.3s ease;
}

.sidebar-nav .nav-link:hover {
  color: var(--accent-blue-primary);
  background: var(--dark-bg-tertiary);
  transform: translateX(5px);
}

.sidebar-nav .nav-link:not(.collapsed) {
  color: var(--text-white);
  background: linear-gradient(90deg, var(--accent-blue-primary), var(--accent-blue-secondary));
  box-shadow: var(--glow-blue-strong);
}

.sidebar-nav .nav-link:not(.collapsed)::before {
  transform: scaleY(1);
}

.sidebar-nav .nav-link i {
  color: inherit;
  font-size: 1.2rem;
  margin-right: 10px;
}

/* ===================================
   MAIN CONTENT AREA
   =================================== */

#main {
  background: transparent;
  position: relative;
  z-index: 1;
}

.pagetitle {
  margin-bottom: 2rem;
}

.pagetitle h1 {
  color: var(--text-white);
  font-weight: 600;
  font-size: 2rem;
  text-shadow: var(--glow-blue);
  margin-bottom: 0.5rem;
}

.breadcrumb {
  background: var(--dark-bg-card);
  backdrop-filter: var(--blur-sm);
  -webkit-backdrop-filter: var(--blur-sm);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  padding: 0.75rem 1.5rem;
}

.breadcrumb-item {
  color: var(--text-secondary);
}

.breadcrumb-item.active {
  color: var(--accent-blue-primary);
}

.breadcrumb-item a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.3s ease;
}

.breadcrumb-item a:hover {
  color: var(--accent-blue-primary);
}

/* ===================================
   CARD STYLES
   =================================== */

.card {
  background: var(--dark-bg-card) !important;
  backdrop-filter: var(--blur-md);
  -webkit-backdrop-filter: var(--blur-md);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  box-shadow: var(--shadow-md);
  transition: all 0.3s ease;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg), var(--glow-blue);
  border-color: var(--accent-blue-primary);
}

.card-header {
  background: var(--dark-bg-tertiary) !important;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-white);
  padding: 1.25rem;
}

.card-title {
  color: var(--text-white);
  font-weight: 600;
  margin-bottom: 0;
}

.card-body {
  color: var(--text-primary);
  padding: 1.5rem;
}

.card-text {
  color: var(--text-secondary);
}

/* FAQ / Accordion */
body.dark-theme .accordion-item {
  background: var(--dark-bg-secondary) !important;
  border: 1px solid var(--border-color) !important;
}

body.dark-theme .accordion-button {
  background: var(--dark-bg-tertiary) !important;
  color: var(--text-primary) !important;
  box-shadow: none !important;
}

body.dark-theme .accordion-button.collapsed {
  background: var(--dark-bg-tertiary) !important;
  color: var(--text-white) !important;
}

body.dark-theme .accordion-button:not(.collapsed) {
  background: rgba(59, 130, 246, 0.15) !important;
  color: var(--accent-blue-light) !important;
  border-bottom: 1px solid var(--border-color);
}

body.dark-theme .accordion-button::after {
  filter: brightness(0) saturate(100%) invert(89%) sepia(10%) saturate(296%) hue-rotate(185deg) brightness(96%) contrast(92%);
}

body.dark-theme .accordion-body {
  background: var(--dark-bg-secondary) !important;
  color: var(--text-secondary) !important;
}

body.dark-theme .accordion-body strong {
  color: var(--text-white) !important;
}

/* Card Image Overlay */
.card-img-top {
  border-radius: 16px 16px 0 0;
  transition: all 0.3s ease;
}

.card:hover .card-img-top {
  transform: scale(1.05);
}

/* Info Cards (Dashboard) */
.info-card {
  position: relative;
  overflow: hidden;
}

.info-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, var(--accent-blue-glow) 0%, transparent 70%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

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

.info-card .card-icon {
  background: linear-gradient(135deg, var(--accent-blue-primary), var(--accent-blue-secondary));
  color: white;
  font-size: 2rem;
  width: 60px;
  height: 60px;
  box-shadow: var(--glow-blue-strong);
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.info-card h6 {
  color: var(--text-white);
  font-size: 2rem;
  font-weight: 700;
  margin: 0;
}

/* ===================================
   BUTTON STYLES
   =================================== */

.btn {
  border-radius: 12px;
  padding: 0.75rem 1.5rem;
  font-weight: 500;
  transition: all 0.3s ease;
  border: none;
  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, 0.2);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--accent-blue-primary), var(--accent-blue-secondary)) !important;
  color: white !important;
  box-shadow: var(--glow-blue);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--accent-blue-dark), var(--accent-blue-primary)) !important;
  box-shadow: var(--glow-blue-strong);
  transform: translateY(-2px);
}

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

.btn-secondary:hover {
  background: var(--dark-bg-secondary) !important;
  border-color: var(--accent-blue-primary);
  color: var(--accent-blue-primary) !important;
}

.btn-success {
  background: linear-gradient(135deg, #10b981, #34d399) !important;
  color: white !important;
}

.btn-danger {
  background: linear-gradient(135deg, #ef4444, #f87171) !important;
  color: white !important;
}

.btn-info {
  background: linear-gradient(135deg, #06b6d4, #22d3ee) !important;
  color: white !important;
}

.btn-warning {
  background: linear-gradient(135deg, #f59e0b, #fbbf24) !important;
  color: white !important;
}

.btn-outline-primary {
  border: 2px solid var(--accent-blue-primary) !important;
  color: var(--accent-blue-primary) !important;
  background: transparent !important;
}

.btn-outline-primary:hover {
  background: var(--accent-blue-primary) !important;
  color: white !important;
  box-shadow: var(--glow-blue-strong);
}

.btn-outline-secondary {
  border: 2px solid var(--text-secondary) !important;
  color: var(--text-secondary) !important;
  background: transparent !important;
}

.btn-outline-danger {
  border: 2px solid #ef4444 !important;
  color: #ef4444 !important;
  background: transparent !important;
}

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

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.125rem;
}

/* ===================================
   FORM STYLES
   =================================== */

.form-control, .form-select {
  background: var(--dark-bg-tertiary) !important;
  border: 1px solid var(--border-color);
  color: var(--text-primary) !important;
  border-radius: 12px;
  padding: 0.75rem 1rem;
  transition: all 0.3s ease;
}

.form-control:focus, .form-select:focus {
  background: var(--dark-bg-secondary) !important;
  border-color: var(--accent-blue-primary);
  box-shadow: var(--glow-blue);
  color: var(--text-white) !important;
}

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

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

.input-group-text {
  background: var(--dark-bg-tertiary) !important;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  border-radius: 12px 0 0 12px;
}

.form-control:focus + .input-group-text {
  border-color: var(--accent-blue-primary);
}

/* ===================================
   TABLE STYLES
   =================================== */

.table {
  color: var(--text-primary);
  border-color: var(--border-color);
}

.table thead th {
  background: var(--dark-bg-tertiary);
  color: var(--text-white);
  border-color: var(--border-color);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.875rem;
  letter-spacing: 0.5px;
  padding: 1rem;
}

.table tbody tr {
  border-color: var(--border-color);
  transition: all 0.3s ease;
}

.table tbody tr:hover {
  background: var(--dark-bg-tertiary);
  transform: scale(1.01);
  box-shadow: var(--shadow-sm);
}

.table tbody td {
  padding: 1rem;
  vertical-align: middle;
  border-color: var(--border-color-light);
}

.table-striped tbody tr:nth-of-type(odd) {
  background: rgba(59, 130, 246, 0.02);
}

.table-hover tbody tr:hover {
  background: var(--dark-bg-tertiary);
}

/* ===================================
   BADGE STYLES
   =================================== */

.badge {
  padding: 0.5rem 1rem;
  border-radius: 50px;
  font-weight: 500;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.bg-primary {
  background: linear-gradient(135deg, var(--accent-blue-primary), var(--accent-blue-secondary)) !important;
  box-shadow: var(--glow-blue);
}

.bg-success {
  background: linear-gradient(135deg, #10b981, #34d399) !important;
}

.bg-danger {
  background: linear-gradient(135deg, #ef4444, #f87171) !important;
}

.bg-warning {
  background: linear-gradient(135deg, #f59e0b, #fbbf24) !important;
}

.bg-info {
  background: linear-gradient(135deg, #06b6d4, #22d3ee) !important;
}

.bg-secondary {
  background: var(--dark-bg-tertiary) !important;
}

/* ===================================
   ALERT STYLES
   =================================== */

.alert {
  border-radius: 12px;
  border: 1px solid;
  backdrop-filter: var(--blur-sm);
  -webkit-backdrop-filter: var(--blur-sm);
  padding: 1rem 1.5rem;
  animation: slideInDown 0.5s ease;
}

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

.alert-success {
  background: rgba(16, 185, 129, 0.1) !important;
  border-color: #10b981;
  color: #34d399;
}

.alert-danger {
  background: rgba(239, 68, 68, 0.1) !important;
  border-color: #ef4444;
  color: #f87171;
}

.alert-warning {
  background: rgba(245, 158, 11, 0.1) !important;
  border-color: #f59e0b;
  color: #fbbf24;
}

.alert-info {
  background: rgba(6, 182, 212, 0.1) !important;
  border-color: #06b6d4;
  color: #22d3ee;
}

/* ===================================
   MODAL STYLES
   =================================== */

.modal-content {
  background: var(--dark-bg-card) !important;
  backdrop-filter: var(--blur-lg);
  -webkit-backdrop-filter: var(--blur-lg);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  border-bottom: 1px solid var(--border-color);
  background: var(--dark-bg-tertiary);
}

.modal-title {
  color: var(--text-white);
}

.modal-body {
  color: var(--text-primary);
}

.modal-footer {
  border-top: 1px solid var(--border-color);
  background: var(--dark-bg-tertiary);
}

.btn-close {
  filter: invert(1);
  opacity: 0.7;
}

.btn-close:hover {
  opacity: 1;
}

/* ===================================
   PAGINATION STYLES
   =================================== */

.pagination {
  gap: 0.5rem;
}

.page-link {
  background: var(--dark-bg-tertiary) !important;
  border: 1px solid var(--border-color);
  color: var(--text-primary) !important;
  border-radius: 8px;
  transition: all 0.3s ease;
}

.page-link:hover {
  background: var(--accent-blue-primary) !important;
  border-color: var(--accent-blue-primary);
  color: white !important;
  transform: translateY(-2px);
  box-shadow: var(--glow-blue);
}

.page-item.active .page-link {
  background: linear-gradient(135deg, var(--accent-blue-primary), var(--accent-blue-secondary)) !important;
  border-color: var(--accent-blue-primary);
  box-shadow: var(--glow-blue-strong);
}

/* ===================================
   FOOTER STYLES
   =================================== */

#footer {
  background: var(--dark-bg-card);
  backdrop-filter: var(--blur-md);
  -webkit-backdrop-filter: var(--blur-md);
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
}

#footer a {
  color: var(--accent-blue-primary);
  transition: all 0.3s ease;
}

#footer a:hover {
  color: var(--accent-blue-secondary);
  text-shadow: var(--glow-blue);
}

/* ===================================
   BACK TO TOP BUTTON
   =================================== */

.back-to-top {
  background: linear-gradient(135deg, var(--accent-blue-primary), var(--accent-blue-secondary)) !important;
  color: white;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  box-shadow: var(--glow-blue-strong);
  transition: all 0.3s ease;
}

.back-to-top:hover {
  transform: translateY(-5px) scale(1.1);
  box-shadow: 0 0 40px rgba(59, 130, 246, 0.6);
}

/* ===================================
   PRODUCT CARD SPECIAL EFFECTS
   =================================== */

.product-card {
  position: relative;
  overflow: hidden;
}

.product-card::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(
    45deg,
    transparent,
    rgba(59, 130, 246, 0.1),
    transparent
  );
  transform: rotate(45deg);
  transition: all 0.5s ease;
}

.product-card:hover::after {
  animation: shine 1.5s ease;
}

@keyframes shine {
  0% { left: -50%; }
  100% { left: 150%; }
}

/* ===================================
   LOADING SPINNER
   =================================== */

.spinner-border {
  border-color: var(--accent-blue-primary);
  border-right-color: transparent;
}

/* ===================================
   SCROLLBAR STYLES
   =================================== */

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--dark-bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(135deg, var(--accent-blue-primary), var(--accent-blue-secondary));
  border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(135deg, var(--accent-blue-dark), var(--accent-blue-primary));
}

/* ===================================
   TEXT UTILITIES
   =================================== */

.text-primary {
  color: var(--accent-blue-primary) !important;
}

.text-muted {
  color: var(--text-muted) !important;
}

.text-white {
  color: var(--text-white) !important;
}

/* ===================================
   GLASSMORPHISM EFFECT
   =================================== */

.glass-effect {
  background: rgba(20, 27, 45, 0.6) !important;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(148, 163, 184, 0.1);
}

/* ===================================
   ANIMATION UTILITIES
   =================================== */

.fade-in {
  animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.slide-up {
  animation: slideUp 0.5s ease;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===================================
   RESPONSIVE ADJUSTMENTS
   =================================== */

@media (max-width: 768px) {
  .pagetitle h1 {
    font-size: 1.5rem;
  }
  
  .card {
    margin-bottom: 1rem;
  }
  
  .btn {
    padding: 0.6rem 1.2rem;
  }
}

/* ===================================
   SPECIAL EFFECTS FOR LOGIN/REGISTER
   =================================== */

.register, .login-section {
  background: linear-gradient(135deg, #0a0e27 0%, #141b2d 50%, #1a2332 100%);
  position: relative;
}

.register::before, .login-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(circle at 30% 30%, rgba(59, 130, 246, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 70% 70%, rgba(96, 165, 250, 0.03) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

/* ===================================
   CREDITS
   =================================== */

.credits {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.credits a {
  color: var(--accent-blue-primary);
  text-decoration: none;
  transition: all 0.3s ease;
}

.credits a:hover {
  color: var(--accent-blue-secondary);
  text-shadow: var(--glow-blue);
}