/* ============================================
   GLOBAL STYLES & RESET
   ============================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Primary Colors - Cyan/Teal Theme */
  --primary: #06b6d4;
  --primary-dark: #0891b2;
  --primary-light: #22d3ee;
  --primary-glow: rgba(6, 182, 212, 0.3);
  
  /* Accent Colors */
  --accent: #3b82f6;
  --accent-dark: #2563eb;
  --accent-light: #60a5fa;
  --secondary: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --info: #0ea5e9;
  
  /* Dark Theme Colors */
  --bg-primary: #0a0a0f;
  --bg-secondary: #13131a;
  --bg-tertiary: #1a1a24;
  --bg-card: #1f1f2e;
  --bg-elevated: #252536;
  
  /* Text Colors */
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-disabled: #64748b;
  
  /* Border Colors */
  --border-primary: #2d2d3f;
  --border-secondary: #3d3d52;
  --border-accent: #4d4d66;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 20px var(--primary-glow);
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  
  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.2s ease;
  --transition-slow: 0.3s ease;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-image: 
    radial-gradient(at 0% 0%, rgba(139, 92, 246, 0.05) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(6, 182, 212, 0.05) 0px, transparent 50%);
}

#app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.container {
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  width: 100%;
}

/* ============================================
   HEADER
   ============================================ */
.header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-primary);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(10px);
  background: rgba(19, 19, 26, 0.8);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg) 0;
}

.logo h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  margin: 0;
}

.logo p {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.nav {
  display: flex;
  gap: var(--spacing-sm);
}

.nav-btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-weight: 500;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  font-size: 0.875rem;
  position: relative;
}

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

.nav-btn.active {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  box-shadow: var(--shadow-glow);
}

/* Language Switcher */
.language-switcher {
  display: flex;
  gap: 0.25rem;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: 0.25rem;
  border: 1px solid var(--border-primary);
}

.lang-btn {
  padding: 0.375rem 0.75rem;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.75rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-base);
  min-width: 2.5rem;
}

.lang-btn:hover {
  color: var(--text-primary);
  background: var(--bg-elevated);
}

.lang-btn.active {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  box-shadow: var(--shadow-glow);
}

/* ============================================
   MAIN CONTENT
   ============================================ */
.main-content {
  flex: 1;
  padding: var(--spacing-2xl) 0;
}

.view {
  display: none;
}

.view.active {
  display: block;
  animation: fadeIn 0.3s ease-in;
}

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

/* ============================================
   DASHBOARD
   ============================================ */
.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xl);
}

.dashboard-header h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  text-transform: capitalize;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

.stat-card {
  background: var(--bg-card);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  transition: all var(--transition-base);
  border: 1px solid var(--border-primary);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: opacity var(--transition-base);
}

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

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

.stat-icon {
  font-size: 2.5rem;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: var(--spacing-xs);
  text-transform: capitalize;
  font-weight: 500;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================
   SECTIONS
   ============================================ */
.section {
  margin-bottom: var(--spacing-2xl);
}

.section h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  text-transform: capitalize;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xl);
}

.section-header h2 {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--text-primary);
  text-transform: capitalize;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-md);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-base);
  font-size: 0.875rem;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  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, 0.1);
  transform: translate(-50%, -50%);
  transition: width 0.4s, height 0.4s;
}

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

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

.btn-primary:hover {
  box-shadow: var(--shadow-glow);
  transform: translateY(-1px);
}

.btn-secondary {
  background: linear-gradient(135deg, var(--secondary) 0%, #059669 100%);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-secondary:hover {
  box-shadow: 0 0 20px rgba(16, 185, 129, 0.3);
  transform: translateY(-1px);
}

.btn-danger {
  background: linear-gradient(135deg, var(--danger) 0%, #dc2626 100%);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-danger:hover {
  box-shadow: 0 0 20px rgba(239, 68, 68, 0.3);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-secondary);
  color: var(--text-secondary);
}

.btn-outline:hover {
  background: var(--bg-elevated);
  border-color: var(--border-accent);
  color: var(--text-primary);
}

.btn-large {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1rem;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ============================================
   PROJECTS GRID
   ============================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--spacing-lg);
}

.project-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: all var(--transition-base);
  cursor: pointer;
  border: 1px solid var(--border-primary);
  position: relative;
  display: flex;
  flex-direction: column;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: opacity var(--transition-base);
  z-index: 1;
}

.project-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: var(--border-accent);
}

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

/* Project Card Thumbnail */
.project-card-thumbnail {
  width: 100%;
  height: 180px;
  background: var(--bg-tertiary);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.project-card-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--transition-base);
}

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

.project-card-thumbnail-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1e293b 0%, #334155 50%, #475569 100%);
  position: relative;
  overflow: hidden;
}

.project-card-thumbnail-placeholder::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    linear-gradient(45deg, transparent 30%, rgba(6, 182, 212, 0.1) 50%, transparent 70%),
    radial-gradient(circle at 30% 40%, rgba(59, 130, 246, 0.15), transparent 60%),
    radial-gradient(circle at 70% 60%, rgba(6, 182, 212, 0.15), transparent 60%);
  animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
  0%, 100% { opacity: 0.5; transform: translateX(-10%); }
  50% { opacity: 1; transform: translateX(10%); }
}

.project-card-thumbnail-placeholder-icon {
  font-size: 3rem;
  position: relative;
  z-index: 1;
  filter: drop-shadow(0 2px 8px rgba(6, 182, 212, 0.3));
}

.project-card-thumbnail-placeholder-text {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: 0.5rem;
  position: relative;
  z-index: 1;
  opacity: 0.7;
}

.project-card-thumbnail-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.3) 100%);
  opacity: 0;
  transition: opacity var(--transition-base);
}

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

.project-card-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--border-primary);
  background: var(--bg-elevated);
}

.project-card-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
  text-transform: capitalize;
}

.project-card-subtitle {
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
  font-style: italic;
  opacity: 0.8;
}

.project-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: var(--spacing-sm);
}

.project-card-meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.project-card-body {
  padding: var(--spacing-lg);
}

.progress-bar {
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: var(--spacing-md);
  border: 1px solid var(--border-primary);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary) 0%, var(--accent) 100%);
  transition: width 0.3s ease;
  box-shadow: 0 0 10px var(--primary-glow);
}

.progress-text {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
  font-weight: 500;
}

.steps-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.steps-grid {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.step-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-sm);
}

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

.step-item-grid {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
  background: var(--bg-elevated);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-primary);
  font-size: 0.75rem;
  transition: all var(--transition-base);
}

.step-item-grid:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-secondary);
}

.step-item-video {
  background: linear-gradient(135deg, var(--bg-elevated) 0%, var(--bg-tertiary) 100%);
  border: 1px solid var(--primary);
  box-shadow: 0 0 10px rgba(99, 102, 241, 0.1);
}

.step-item-video-ready {
  cursor: pointer;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-color: var(--primary-light);
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.3);
}

.step-item-video-ready:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(99, 102, 241, 0.5);
}

.step-item-video-ready .step-name {
  color: white;
  font-weight: 600;
}

.watch-icon {
  font-size: 1.25rem;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.8;
    transform: scale(1.1);
  }
}

.step-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 0.875rem;
}

.step-icon {
  font-size: 1rem;
  min-width: 1rem;
}

.step-name {
  flex: 1;
  color: var(--text-secondary);
  text-transform: capitalize;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ============================================
   FORMS
   ============================================ */
.form-container {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  border: 1px solid var(--border-primary);
}

.form-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-primary);
  background: var(--bg-tertiary);
}

.form-tab {
  flex: 1;
  padding: var(--spacing-lg);
  background: transparent;
  border: none;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
}

.form-tab:hover {
  background: var(--bg-elevated);
  color: var(--text-secondary);
}

.form-tab.active {
  background: var(--bg-card);
  color: var(--primary-light);
  border-bottom: 2px solid var(--primary);
}

.form-tab.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary) 0%, var(--accent) 100%);
  box-shadow: 0 0 10px var(--primary-glow);
}

.form-tab-content {
  display: none;
  padding: var(--spacing-xl);
}

.form-tab-content.active {
  display: block;
}

/* Manual Scenario Sub-Tabs */
.manual-scenario-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: var(--spacing-lg);
  background: var(--bg-elevated);
  padding: 0.5rem;
  border-radius: var(--radius-md);
}

.manual-tab {
  flex: 1;
  padding: var(--spacing-md) var(--spacing-lg);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-base);
  font-size: 0.9rem;
}

.manual-tab:hover {
  background: var(--bg-card);
  color: var(--text-secondary);
  border-color: var(--border-secondary);
}

.manual-tab.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  box-shadow: 0 2px 8px rgba(6, 182, 212, 0.3);
}

.manual-tab-content {
  display: none;
}

.manual-tab-content.active {
  display: block;
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

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

.form-group input[type="text"],
.form-group textarea {
  width: 100%;
  padding: var(--spacing-md);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.875rem;
  transition: all var(--transition-base);
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.form-group input[type="text"]::placeholder,
.form-group textarea::placeholder {
  color: var(--text-disabled);
}

.form-group input[type="text"]:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
  background: var(--bg-elevated);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

/* File Upload */
.file-upload {
  position: relative;
}

.file-upload input[type="file"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.file-upload-label {
  display: block;
  padding: var(--spacing-lg);
  border: 2px dashed var(--border-secondary);
  border-radius: var(--radius-md);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-base);
  color: var(--text-muted);
  background: var(--bg-tertiary);
}

.file-upload-label:hover {
  border-color: var(--primary);
  background: var(--bg-elevated);
  color: var(--text-secondary);
  box-shadow: 0 0 20px var(--primary-glow);
}

.file-upload-label span {
  display: block;
  margin-top: var(--spacing-sm);
  font-size: 0.75rem;
  color: var(--text-disabled);
}

.code-preview {
  background: var(--bg-primary);
  color: var(--text-secondary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  font-family: 'Monaco', 'Courier New', monospace;
  font-size: 0.75rem;
  overflow-x: auto;
  max-height: 400px;
  border: 1px solid var(--border-primary);
}

/* Search Box */
.search-box input {
  padding: var(--spacing-sm) var(--spacing-lg);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-md);
  width: 300px;
  font-size: 0.875rem;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  transition: all var(--transition-base);
}

.search-box input::placeholder {
  color: var(--text-disabled);
}

.search-box input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
  background: var(--bg-elevated);
}

/* Filter Chips */
.filter-chips {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
}

.filter-chip {
  padding: var(--spacing-sm) var(--spacing-lg);
  border: 2px solid var(--border-secondary);
  border-radius: var(--radius-full);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.filter-chip:hover {
  border-color: var(--primary);
  background: var(--bg-elevated);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.filter-chip.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  box-shadow: 0 4px 12px var(--primary-glow);
}

.filter-chip.active:hover {
  background: #5558dd;
  border-color: #5558dd;
}

.filter-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.5rem;
  height: 1.5rem;
  padding: 0 0.5rem;
  border-radius: var(--radius-full);
  background: var(--bg-elevated);
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: 600;
  margin-left: 0.5rem;
}

.filter-chip.active .filter-count {
  background: rgba(255, 255, 255, 0.2);
  color: white;
}

.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}

.loading-overlay.hidden {
  display: none;
}

.loading-bars {
  width: 200px;
  height: 4px;
  background: var(--bg-tertiary);
  border-radius: 2px;
  overflow: hidden;
  position: relative;
}

.loading-bars::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  background: repeating-linear-gradient(
    90deg,
    transparent,
    transparent 10px,
    var(--primary) 10px,
    var(--primary) 20px,
    var(--primary-light) 20px,
    var(--primary-light) 30px,
    transparent 30px,
    transparent 40px
  );
  animation: loading-slide 2s linear infinite;
  box-shadow: 0 0 15px var(--primary-glow);
}

@keyframes loading-slide {
  0% {
    transform: translateX(-40px);
  }
  100% {
    transform: translateX(0);
  }
}

.loading-overlay p {
  color: white;
  margin-top: var(--spacing-xl);
  font-size: 1rem;
  font-weight: 500;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.toast {
  position: fixed;
  bottom: var(--spacing-xl);
  right: var(--spacing-xl);
  background: var(--bg-elevated);
  color: white;
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  z-index: 9998;
  animation: slideIn 0.3s ease-out;
  border: 1px solid var(--border-accent);
}

.toast.hidden {
  display: none;
}

.toast.success {
  background: linear-gradient(135deg, var(--secondary) 0%, #059669 100%);
  box-shadow: 0 0 20px rgba(16, 185, 129, 0.3);
}

.toast.error {
  background: linear-gradient(135deg, var(--danger) 0%, #dc2626 100%);
  box-shadow: 0 0 20px rgba(239, 68, 68, 0.3);
}

.toast.warning {
  background: linear-gradient(135deg, var(--warning) 0%, #d97706 100%);
  box-shadow: 0 0 20px rgba(245, 158, 11, 0.3);
}

@keyframes slideIn {
  from {
    transform: translateX(400px);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-primary);
  padding: var(--spacing-lg) 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* ============================================
   PROJECT DETAIL
   ============================================ */
.project-detail-header {
  background: var(--bg-card);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  margin-bottom: var(--spacing-xl);
  border: 1px solid var(--border-primary);
  position: relative;
  overflow: hidden;
}

.project-detail-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}

/* Project Detail Thumbnail */
.project-detail-thumbnail {
  width: 100%;
  max-width: 800px;
  height: 400px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: var(--spacing-xl) auto;
  border: 2px solid var(--border-secondary);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.project-detail-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.project-detail-thumbnail-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1e293b 0%, #334155 50%, #475569 100%);
  color: var(--text-muted);
  gap: var(--spacing-md);
  position: relative;
  overflow: hidden;
}

.project-detail-thumbnail-placeholder::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    linear-gradient(45deg, transparent 30%, rgba(6, 182, 212, 0.1) 50%, transparent 70%),
    radial-gradient(circle at 30% 40%, rgba(59, 130, 246, 0.2), transparent 60%),
    radial-gradient(circle at 70% 60%, rgba(6, 182, 212, 0.2), transparent 60%);
  animation: shimmer 3s ease-in-out infinite;
}

.project-detail-thumbnail-placeholder-icon {
  font-size: 6rem;
  position: relative;
  z-index: 1;
  filter: drop-shadow(0 4px 12px rgba(6, 182, 212, 0.4));
}

.project-detail-thumbnail-placeholder-text {
  font-size: 1.25rem;
  text-transform: capitalize;
  position: relative;
  z-index: 1;
  color: var(--text-secondary);
  font-weight: 500;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.project-detail-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
  text-transform: capitalize;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.project-detail-subtitle {
  font-size: 1.125rem;
  font-weight: 500;
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
  font-style: italic;
  opacity: 0.85;
}

.project-detail-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-md);
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-top: var(--spacing-md);
}

.project-detail-meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-elevated);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-primary);
}

.project-detail-meta .btn {
  white-space: nowrap;
}

.steps-container {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
}

.step-card {
  background: var(--bg-card);
  padding: var(--spacing-md);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border-left: 4px solid var(--border-secondary);
  transition: all var(--transition-base);
  border: 1px solid var(--border-primary);
  border-left-width: 4px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 100px;
}

.step-card.completed {
  border-left-color: var(--secondary);
  box-shadow: 0 0 20px rgba(16, 185, 129, 0.1);
}

.step-card.in-progress {
  border-left-color: var(--warning);
  box-shadow: 0 0 20px rgba(245, 158, 11, 0.1);
}

.step-card.error {
  border-left-color: var(--danger);
  box-shadow: 0 0 20px rgba(239, 68, 68, 0.1);
}

.step-card.loading {
  border-left-color: var(--primary);
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.2);
  position: relative;
  overflow: hidden;
}

.step-card.loading::before {
  content: '';
  position: absolute;
  top: 0;
  left: -50%;
  width: 200%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(99, 102, 241, 0.08) 20%,
    rgba(99, 102, 241, 0.2) 50%,
    rgba(99, 102, 241, 0.08) 80%,
    transparent 100%
  );
  animation: shimmer-alternate 2.5s ease-in-out infinite alternate;
  pointer-events: none;
  z-index: 1;
}

@keyframes shimmer-alternate {
  0% {
    transform: translateX(-25%);
  }
  100% {
    transform: translateX(25%);
  }
}

.step-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-sm);
}

.step-card-title {
  font-size: 1rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-primary);
  text-transform: capitalize;
}

.step-card-actions {
  display: flex;
  gap: var(--spacing-sm);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .nav {
    width: 100%;
  }

  .nav-btn {
    flex: 1;
    font-size: 0.75rem;
    padding: var(--spacing-sm);
  }

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

  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .steps-container {
    grid-template-columns: 1fr;
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-md);
  }

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

  .dashboard-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-md);
  }
}

/* ============================================
   VIDEO MODAL
   ============================================ */
.video-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.video-modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.9);
  backdrop-filter: blur(10px);
}

.video-modal-content {
  position: relative;
  z-index: 10001;
  max-width: 1280px;
  width: 90vw;
  aspect-ratio: 16 / 9;
  padding: var(--spacing-xl);
}

.video-modal-close {
  position: absolute;
  top: -40px;
  right: 0;
  background: var(--bg-elevated);
  border: 2px solid var(--border-accent);
  color: var(--text-primary);
  font-size: 1.5rem;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
}

.video-modal-close:hover {
  background: var(--danger);
  border-color: var(--danger);
  transform: rotate(90deg);
}

/* ============================================
   SCENARIO EDITOR
   ============================================ */
.scenario-section {
  background: var(--bg-card);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-primary);
}

.scenario-display,
.scenario-editor,
.youtube-content-display {
  margin-top: var(--spacing-lg);
}

.scenario-preview,
.youtube-preview {
  background: var(--bg-primary);
  color: var(--text-secondary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  font-family: 'Monaco', 'Courier New', monospace;
  font-size: 0.875rem;
  overflow-x: auto;
  overflow-y: auto;
  border: 1px solid var(--border-primary);
  line-height: 1.6;
  white-space: pre-wrap;
  word-wrap: break-word;
}

.youtube-preview {
  max-height: 300px;
}

.scenario-preview {
  max-height: 400px;
}

.scenario-textarea {
  width: 100%;
  min-height: 500px;
  padding: var(--spacing-lg);
  background: var(--bg-primary);
  color: var(--text-secondary);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-md);
  font-family: 'Monaco', 'Courier New', monospace;
  font-size: 0.875rem;
  line-height: 1.6;
  resize: vertical;
  transition: all var(--transition-base);
}

.scenario-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

/* ============================================
   VIDEO READY SECTION
   ============================================ */
.video-ready-section {
  background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-elevated) 100%);
  border: 2px solid var(--primary);
  box-shadow: 0 0 30px var(--primary-glow);
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.hidden {
  display: none !important;
}

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

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

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