:root {
  --bg-primary: #000000;
  --bg-card: #121212;
  --bg-card-hover: #1e1e1e;
  
  --accent-yellow: #FFFF00;
  --accent-orange: #FF6B00;
  --accent-gold:   #FFD700;
  
  --text-primary: #ffffff;
  --text-secondary: #b3b3b3;
  --text-dark: #000000;
  
  --font-family: 'Poppins', sans-serif;
  
  --border-radius-sm: 8px;
  --border-radius-md: 16px;
  --border-radius-lg: 24px;
  --border-radius-pill: 50px;
  
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  
  --shadow-glow: 0 4px 15px rgba(255, 255, 0, 0.2);
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.5);
  --glass-bg: rgba(18, 18, 18, 0.7);
  --glass-border: rgba(255, 255, 255, 0.1);

  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  overflow-x: hidden;
  /* Mobile optimization */
  user-select: none;
}

/* App Container */
#app {
  max-width: 480px; /* Mobile width constraint */
  margin: 0 auto;
  min-height: 100vh;
  position: relative;
  background-color: var(--bg-primary);
  box-shadow: 0 0 50px rgba(0,0,0,0.8);
  overflow: hidden;
}

/* Screen Management */
.screen {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
  overflow-y: auto;
  background-color: var(--bg-primary);
  z-index: 10;
  padding-bottom: 80px; /* Space for bottom nav/cart */
}

.screen.active {
  opacity: 1;
  pointer-events: auto;
  z-index: 20;
}

/* Hide scrollbar for clean look */
::-webkit-scrollbar {
  width: 0px;
  background: transparent;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.text-gradient {
  background: linear-gradient(45deg, var(--accent-yellow), var(--accent-orange));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 24px;
  border-radius: var(--border-radius-pill);
  font-weight: 600;
  font-size: 16px;
  font-family: var(--font-family);
  cursor: pointer;
  border: none;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  width: 100%;
  text-align: center;
}

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

.btn-primary {
  background: var(--accent-yellow);
  color: var(--text-dark);
  box-shadow: var(--shadow-glow);
}

.btn-secondary {
  background: transparent;
  color: var(--accent-yellow);
  border: 2px solid var(--accent-yellow);
}

.btn-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
}

/* Header / Top Bar */
.top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-lg);
  position: sticky;
  top: 0;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 50;
  border-bottom: 1px solid var(--glass-border);
}

.top-bar .logo-text {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.top-bar-actions {
  display: flex;
  gap: var(--spacing-sm);
}

/* Icons via FontAwesome or SVG - style base */
.icon {
  font-size: 20px;
}

.cart-btn {
  position: relative;
}

.cart-badge {
  position: absolute;
  top: -5px;
  right: -5px;
  background: var(--accent-orange);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  display: none; /* Hidden by default */
  box-shadow: 0 2px 5px rgba(0,0,0,0.5);
  transition: transform var(--transition-fast);
}

/* Animations */
@keyframes pulse {
  0% { transform: scale(1); opacity: 0.8; }
  50% { transform: scale(1.1); opacity: 1; text-shadow: var(--shadow-glow); }
  100% { transform: scale(1); opacity: 0.8; }
}

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

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

.animate-slide-up {
  animation: slideUp 0.4s ease forwards;
}

.animate-fade-in {
  animation: fadeIn 0.4s ease forwards;
}

/* Skeleton Loading Effect */
@keyframes shimmer {
  0% { background-position: -468px 0; }
  100% { background-position: 468px 0; }
}

.skeleton {
  background: #2a2a2a;
  background-image: linear-gradient(to right, #2a2a2a 0%, #3a3a3a 20%, #2a2a2a 40%, #2a2a2a 100%);
  background-repeat: no-repeat;
  background-size: 800px 100%;
  animation-duration: 1.5s;
  animation-fill-mode: forwards;
  animation-iteration-count: infinite;
  animation-name: shimmer;
  animation-timing-function: linear;
  border-radius: var(--border-radius-sm);
  color: transparent !important;
}

.skeleton * {
  visibility: hidden;
}

/* Hover & Card Effects */
.product-card {
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  cursor: pointer;
}

.product-card:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-card);
  border-color: var(--accent-yellow);
}

.category-card {
  transition: transform var(--transition-fast);
}

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

.nav-item {
  transition: all var(--transition-fast);
}

/* Base Utility Classes */
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }

.flex-row { display: flex; align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--spacing-md); }

/* Glass layout */
.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-md);
}

/* ─── Dynamic Header / Banner ─── */
.dynamic-header-wrapper {
  position: relative;
  width: 100%;
  min-height: 180px;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  margin-bottom: var(--spacing-xl);
}

.dynamic-header-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--border-radius-lg);
  display: block;
  transition: opacity 0.6s ease-in-out;
  opacity: 1;
}

.dynamic-header-img.fade-out {
  opacity: 0;
}

.dynamic-header-img.fade-in {
  animation: headerFadeIn 0.6s ease-in-out forwards;
}

@keyframes headerFadeIn {
  from { opacity: 0; transform: scale(1.02); }
  to   { opacity: 1; transform: scale(1); }
}

.dynamic-header-fallback {
  background: linear-gradient(135deg, #FF6B00 0%, #FFD700 100%);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  color: #000;
  position: relative;
  overflow: hidden;
  min-height: 180px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* Mobile Preview Frame */
.mobile-preview-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.85);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(8px);
}

.mobile-preview-frame {
  width: 375px;
  height: 680px;
  background: #000;
  border-radius: 40px;
  border: 4px solid #333;
  box-shadow: 0 0 60px rgba(255,215,0,0.15), 0 20px 60px rgba(0,0,0,0.6);
  overflow: hidden;
  position: relative;
  display: flex;
  flex-direction: column;
}

.mobile-preview-frame::before {
  content: '';
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 28px;
  background: #1a1a1a;
  border-radius: 20px;
  z-index: 10;
}

.mobile-preview-content {
  flex: 1;
  overflow-y: auto;
  padding-top: 50px;
}

.mobile-preview-content img {
  width: 100%;
  display: block;
}

/* ─── Header Management System ─── */

/* Upload Drop Zone */
.header-upload-zone {
  position: relative;
  border: 2px dashed rgba(255, 255, 255, 0.15);
  border-radius: var(--border-radius-lg);
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
  background: linear-gradient(135deg, rgba(18, 18, 18, 0.6) 0%, rgba(30, 30, 30, 0.4) 100%);
  overflow: hidden;
}

.header-upload-zone::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(255, 215, 0, 0.03) 0%, transparent 70%);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.header-upload-zone:hover,
.header-upload-zone.drag-over {
  border-color: var(--accent-yellow);
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.05) 0%, rgba(255, 107, 0, 0.03) 100%);
  box-shadow: 0 0 30px rgba(255, 215, 0, 0.08), inset 0 0 20px rgba(255, 215, 0, 0.03);
}

.header-upload-zone:hover::before,
.header-upload-zone.drag-over::before {
  opacity: 1;
}

.header-upload-zone .upload-icon {
  font-size: 40px;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--accent-yellow), var(--accent-orange));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: block;
  transition: transform 0.3s ease;
}

.header-upload-zone:hover .upload-icon {
  transform: translateY(-4px) scale(1.1);
}

.header-upload-zone .upload-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.header-upload-zone .upload-subtitle {
  font-size: 13px;
  color: var(--text-secondary);
}

.header-upload-zone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

/* Upload Progress */
.header-upload-progress {
  margin-top: 16px;
  display: none;
}

.header-upload-progress .progress-bar-track {
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  overflow: hidden;
}

.header-upload-progress .progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-yellow), var(--accent-orange));
  border-radius: 4px;
  transition: width 0.3s ease;
  width: 0%;
}

.header-upload-progress .progress-label {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 8px;
  text-align: center;
}

/* Header Version Cards */
.header-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
  margin-top: 24px;
}

.header-version-card {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  overflow: hidden;
  transition: all 0.3s ease;
  position: relative;
}

.header-version-card:hover {
  border-color: rgba(255, 215, 0, 0.3);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  transform: translateY(-2px);
}

.header-version-card.is-active {
  border-color: rgba(76, 175, 80, 0.5);
  box-shadow: 0 0 20px rgba(76, 175, 80, 0.1);
}

.header-version-card .card-thumbnail {
  position: relative;
  width: 100%;
  height: 160px;
  overflow: hidden;
  background: #0a0a0a;
}

.header-version-card .card-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

.header-version-card:hover .card-thumbnail img {
  transform: scale(1.05);
}

.header-version-card .card-thumbnail .thumbnail-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.7) 0%, transparent 50%);
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  padding: 12px;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.header-version-card:hover .card-thumbnail .thumbnail-overlay {
  opacity: 1;
}

.header-version-card .card-body {
  padding: 16px;
}

.header-version-card .card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

/* Status Badges */
.header-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.header-status-badge.status-active {
  background: rgba(76, 175, 80, 0.15);
  color: #4CAF50;
  box-shadow: 0 0 12px rgba(76, 175, 80, 0.15);
}

.header-status-badge.status-active::before {
  content: '';
  width: 6px;
  height: 6px;
  background: #4CAF50;
  border-radius: 50%;
  animation: statusPulse 2s infinite;
}

.header-status-badge.status-scheduled {
  background: rgba(33, 150, 243, 0.15);
  color: #2196F3;
}

.header-status-badge.status-expired {
  background: rgba(255, 59, 48, 0.1);
  color: #FF3B30;
}

.header-status-badge.status-draft {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-secondary);
}

@keyframes statusPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* Header Card Actions */
.header-card-actions {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}

.header-card-actions button {
  flex: 1;
  padding: 10px 8px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  font-weight: 600;
  font-size: 12px;
  font-family: var(--font-family);
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.header-card-actions button:hover {
  transform: translateY(-1px);
}

.header-card-actions button:active {
  transform: scale(0.97);
}

.header-card-actions .btn-go-live {
  background: linear-gradient(135deg, #4CAF50, #2E7D32);
  color: #fff;
  box-shadow: 0 4px 12px rgba(76, 175, 80, 0.25);
}

.header-card-actions .btn-go-live:hover {
  box-shadow: 0 6px 20px rgba(76, 175, 80, 0.35);
}

.header-card-actions .btn-schedule {
  background: rgba(33, 150, 243, 0.12);
  color: #2196F3;
  border: 1px solid rgba(33, 150, 243, 0.25);
}

.header-card-actions .btn-preview {
  background: rgba(255, 215, 0, 0.1);
  color: var(--accent-gold);
  border: 1px solid rgba(255, 215, 0, 0.2);
}

.header-card-actions .btn-deactivate {
  background: rgba(255, 59, 48, 0.1);
  color: #FF3B30;
  border: 1px solid rgba(255, 59, 48, 0.2);
}

.header-card-actions .btn-delete {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-secondary);
  border: 1px solid rgba(255, 255, 255, 0.08);
  flex: 0;
  padding: 10px 14px;
}

.header-card-actions .btn-delete:hover {
  background: rgba(255, 59, 48, 0.1);
  color: #FF3B30;
  border-color: rgba(255, 59, 48, 0.3);
}

/* Schedule Modal */
.schedule-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(8px);
  animation: fadeIn 0.2s ease;
}

.schedule-modal {
  background: #111;
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 28px;
  width: 100%;
  max-width: 440px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 40px rgba(255, 215, 0, 0.05);
  animation: slideUp 0.3s ease;
}

.schedule-modal h3 {
  font-size: 20px;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.schedule-modal label {
  display: block;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 8px;
  font-weight: 500;
}

.schedule-modal input[type="datetime-local"] {
  width: 100%;
  background: var(--bg-primary);
  border: 1px solid var(--glass-border);
  color: #fff;
  padding: 14px 16px;
  border-radius: 12px;
  font-family: var(--font-family);
  font-size: 15px;
  outline: none;
  margin-bottom: 20px;
  transition: border-color 0.2s;
}

.schedule-modal input[type="datetime-local"]:focus {
  border-color: var(--accent-yellow);
}

.schedule-modal input[type="datetime-local"]::-webkit-calendar-picker-indicator {
  filter: invert(1);
  cursor: pointer;
}

.schedule-modal .modal-actions {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}

.schedule-modal .modal-actions button {
  flex: 1;
  padding: 14px;
  border-radius: 12px;
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  font-family: var(--font-family);
  transition: all 0.2s;
  border: none;
}

/* Empty State */
.header-empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}

.header-empty-state .empty-icon {
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.4;
}

.header-empty-state h4 {
  font-size: 18px;
  color: var(--text-primary);
  margin-bottom: 8px;
}

/* Mobile Preview Close Button */
.mobile-preview-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  backdrop-filter: blur(10px);
}

.mobile-preview-close:hover {
  background: rgba(255, 59, 48, 0.2);
  border-color: rgba(255, 59, 48, 0.4);
  color: #FF3B30;
}