/* Modern Design System - CSS Variables */
:root {
  /* Primary Color Palette */
  --primary-50: #eff6ff;
  --primary-100: #dbeafe;
  --primary-200: #bfdbfe;
  --primary-300: #93c5fd;
  --primary-400: #60a5fa;
  --primary-500: #3b82f6;
  --primary-600: #2563eb;
  --primary-700: #1d4ed8;
  --primary-800: #1e40af;
  --primary-900: #1e3a8a;
  
  /* Neutral Color Palette */
  --neutral-50: #fafafa;
  --neutral-100: #f5f5f5;
  --neutral-200: #e5e5e5;
  --neutral-300: #d4d4d4;
  --neutral-400: #a3a3a3;
  --neutral-500: #737373;
  --neutral-600: #525252;
  --neutral-700: #404040;
  --neutral-800: #262626;
  --neutral-900: #171717;
  
  /* Semantic Colors */
  --success-50: #f0fdf4;
  --success-200: #bbf7d0;
  --success-400: #4ade80;
  --success-500: #22c55e;
  --success-600: #16a34a;
  --warning-50: #fffbeb;
  --warning-200: #fed7aa;
  --warning-400: #fbbf24;
  --warning-500: #f59e0b;
  --warning-600: #d97706;
  --error-50: #fef2f2;
  --error-200: #fecaca;
  --error-400: #f87171;
  --error-500: #ef4444;
  --error-600: #dc2626;
  
  /* Legacy Bootstrap compatibility */
  --primary: var(--primary-600);
  --primary-hover: var(--primary-700);
  
  /* Modern Design Tokens */
  --text-primary: var(--neutral-900);
  --text-secondary: var(--neutral-600);
  --text-muted: var(--neutral-500);
  --text-inverse: #ffffff;
  --bs-body-color: var(--text-primary);
  
  /* Bootstrap 5 Color System Integration */
  --bs-primary: var(--primary-600);
  --bs-secondary: var(--neutral-600);
  --bs-success: var(--success-500);
  --bs-danger: var(--error-500);
  --bs-warning: var(--warning-500);
  --bs-info: var(--primary-500);
  --bs-light: var(--neutral-100);
  --bs-dark: var(--neutral-800);
  
  /* Bootstrap Text Colors */
  --bs-primary-text-emphasis: var(--primary-700);
  --bs-secondary-color: var(--text-muted);
  --bs-success-text-emphasis: var(--success-600);
  --bs-danger-text-emphasis: var(--error-600);
  --bs-warning-text-emphasis: var(--warning-600);
  --bs-info-text-emphasis: var(--primary-700);
  --bs-light-text-emphasis: var(--neutral-700);
  --bs-dark-text-emphasis: var(--neutral-900);
  
  /* Bootstrap Background Colors */
  --bs-primary-bg-subtle: var(--primary-50);
  --bs-secondary-bg-subtle: var(--neutral-100);
  --bs-success-bg-subtle: var(--success-50);
  --bs-danger-bg-subtle: var(--error-50);
  --bs-warning-bg-subtle: var(--warning-50);
  --bs-info-bg-subtle: var(--primary-50);
  --bs-light-bg-subtle: var(--neutral-50);
  --bs-dark-bg-subtle: var(--neutral-200);
  
  /* Bootstrap Border Colors */
  --bs-primary-border-subtle: var(--primary-200);
  --bs-secondary-border-subtle: var(--neutral-300);
  --bs-success-border-subtle: var(--success-200);
  --bs-danger-border-subtle: var(--error-200);
  --bs-warning-border-subtle: var(--warning-200);
  --bs-info-border-subtle: var(--primary-200);
  --bs-light-border-subtle: var(--neutral-200);
  --bs-dark-border-subtle: var(--neutral-400);
  
  /* Bootstrap Core Colors */
  --bs-body-bg: var(--bg-secondary);
  --bs-border-color: var(--border-light);
  --bs-link-color: var(--primary-600);
  --bs-link-hover-color: var(--primary-700);
  --bg-primary: #ffffff;
  --bg-secondary: var(--neutral-50);
  --bg-tertiary: var(--neutral-100);
  --bg-inverse: var(--neutral-900);
  
  --border-light: var(--neutral-200);
  --border-medium: var(--neutral-300);
  --border-strong: var(--neutral-400);
  
  /* Layout Variables */
  --sidebar-width: 280px;
  --sidebar-mobile-width: 80px;
  --header-height: 64px;
  --content-max-width: 1200px;
  
  /* Spacing Scale */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  
  /* Shadows */
  --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 350ms ease;
}

/* Global Styles */
* {
  box-sizing: border-box;
}

body {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--bg-secondary);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Modern Sidebar */
.sidebar {
  width: var(--sidebar-width);
  height: 100vh;
  position: fixed;
  top: 0;
  left: 0;
  background: var(--bg-primary);
  border-right: 1px solid var(--border-light);
  overflow-y: auto;
  transition: width var(--transition-normal);
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

.sidebar-header {
  padding: var(--space-lg);
  border-bottom: 1px solid var(--border-light);
  background: var(--bg-primary);
  position: sticky;
  top: 0;
  z-index: 10;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 1.125rem;
  transition: opacity var(--transition-fast);
}

.sidebar-brand:hover {
  color: var(--primary-600);
  text-decoration: none;
}

.sidebar-content {
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - 120px);
}

.sidebar-nav {
  flex: 1;
}

.sidebar-section {
  margin-bottom: var(--space-xl);
}

.sidebar-section-title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
  padding: 0 var(--space-sm);
}

.sidebar-nav-item {
  margin-bottom: var(--space-xs);
}

.sidebar-nav-link {
  display: flex;
  align-items: center;
  padding: var(--space-sm) var(--space-md);
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  font-weight: 500;
  position: relative;
  line-height: 1.5;
}

.sidebar-nav-link:hover {
  color: var(--primary-600);
  background-color: var(--primary-50);
  text-decoration: none;
  transform: translateX(2px);
}

.sidebar-nav-link.active {
  color: var(--primary-600);
  background-color: var(--primary-100);
  font-weight: 600;
}

.sidebar-nav-link.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 20px;
  background-color: var(--primary-600);
  border-radius: 0 2px 2px 0;
}

.sidebar-nav-icon {
  width: 20px;
  height: 20px;
  margin-right: var(--space-sm);
  font-size: 1.125rem;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.sidebar-nav-text {
  flex: 1;
  line-height: 1.5;
  display: flex;
  align-items: center;
}

.sidebar-nav-badge {
  background-color: var(--primary-100);
  color: var(--primary-700);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.125rem 0.375rem;
  border-radius: 9999px;
  margin-left: auto;
}

/* Generic Collapsible Sidebar Sections */
.sidebar-collapse-toggle {
    margin-left: auto;
    transition: transform var(--transition-fast);
    transform-origin: center;
}

.sidebar-collapse-toggle.collapsed {
    transform: rotate(-90deg);
}

/* Generic submenu styling - works for any .collapse element in sidebar */
.sidebar .collapse {
    margin-left: var(--space-lg);
    border-left: 1px solid var(--border-light);
    padding-left: var(--space-md);
    transition: all var(--transition-normal);
    overflow: hidden;
}

.sidebar .collapse .sidebar-nav-link {
    padding: var(--space-xs) var(--space-sm);
    font-size: 0.8125rem;
    position: relative;
}

/* Enhanced active state for submenu items */
.sidebar .collapse .sidebar-nav-link.active {
    background-color: var(--primary-200);
    color: var(--primary-700);
    font-weight: 600;
}

.sidebar .collapse .sidebar-nav-link.active::before {
    content: '';
    position: absolute;
    left: -16px;
    top: 50%;
    transform: translateY(-50%);
    width: 2px;
    height: 16px;
    background-color: var(--primary-600);
    border-radius: 1px;
}

/* Auto-expanded submenu styling */
.sidebar .collapse.show {
    border-left-color: var(--primary-300);
}

/* Parent link styling when submenu is active */
.sidebar-nav-link[aria-expanded="true"] {
    background-color: var(--primary-50);
    color: var(--primary-600);
}

.sidebar-nav-link[aria-expanded="true"] .sidebar-collapse-toggle {
    color: var(--primary-600);
    transform: rotate(0deg);
}

/* Sidebar Footer */
.sidebar-footer {
  margin-top: auto;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border-light);
}

.sidebar-user {
  display: flex;
  align-items: center;
  padding: var(--space-md);
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
}

.sidebar-user-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
  font-size: 0.875rem;
  margin-right: var(--space-sm);
  box-shadow: var(--shadow-sm);
}

.sidebar-user-info {
  flex: 1;
  min-width: 0;
}

.sidebar-user-name {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text-primary);
  margin: 0;
}

.sidebar-user-email {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Main Content */
#main-content {
  position: fixed;
  top: 0;
  left: var(--sidebar-width);
  right: 0;
  bottom: 0;
  background-color: var(--bg-secondary);
  transition: left var(--transition-normal);
  overflow-y: auto;
}

.main-content-inner {
  padding: var(--space-xl);
  width: 100%;
}

/* When sidebar is not present */
body:not(:has(.sidebar)) #main-content {
  left: 0;
}

/* Modern Button Styles */
.btn-primary {
  background: linear-gradient(135deg, var(--primary-600), var(--primary-700)) !important;
  border: 1px solid var(--primary-600) !important;
  color: white !important;
  font-weight: 500 !important;
  padding: 0.625rem 1.25rem !important;
  border-radius: var(--radius-md) !important;
  box-shadow: var(--shadow-sm) !important;
  transition: all var(--transition-fast) !important;
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-700), var(--primary-800)) !important;
  border-color: var(--primary-700) !important;
  transform: translateY(-1px) !important;
  box-shadow: var(--shadow-md) !important;
}

.btn-primary:active {
  transform: translateY(0) !important;
  box-shadow: var(--shadow-sm) !important;
}

.btn-outline-primary {
  color: var(--primary-600) !important;
  border: 1px solid var(--primary-300) !important;
  background-color: transparent !important;
  font-weight: 500 !important;
  padding: 0.625rem 1.25rem !important;
  border-radius: var(--radius-md) !important;
  transition: all var(--transition-fast) !important;
}

.btn-outline-primary:hover {
  color: white !important;
  background: linear-gradient(135deg, var(--primary-600), var(--primary-700)) !important;
  border-color: var(--primary-600) !important;
  transform: translateY(-1px) !important;
  box-shadow: var(--shadow-sm) !important;
}

.btn-secondary {
  background-color: var(--neutral-600) !important;
  border: 1px solid var(--border-medium) !important;
  color: white !important;
  font-weight: 500 !important;
  padding: 0.625rem 1.25rem !important;
  border-radius: var(--radius-md) !important;
  transition: all var(--transition-fast) !important;
}

.btn-secondary:hover {
  background-color: var(--neutral-700) !important;
  border-color: var(--neutral-800) !important;
  transform: translateY(-1px) !important;
  box-shadow: var(--shadow-sm) !important;
}

/* Modern Card Styles */
.card {
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  overflow: hidden;
}

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

.card-header {
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-light);
  padding: var(--space-lg);
  font-weight: 600;
  color: var(--text-primary);
}

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

.card.major-card {
  flex: 1;
  min-height: 140px;
  position: relative;
  overflow: hidden;
}

.card.major-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-500), var(--primary-600));
}

/* Enhanced Grid Layouts */
.row.g-3 {
    display: flex;
    flex-wrap: wrap;
    align-items: stretch;
  gap: var(--space-lg);
  }

  .col-md-6 {
    display: flex;
  flex: 1;
  min-width: 300px;
}

/* Modern Alert Styles */
.alert {
  border: none;
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.alert::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 4px;
}

.alert-success::before {
  background-color: var(--success-500);
}

.alert-warning::before {
  background-color: var(--warning-500);
}

.alert-danger::before {
  background-color: var(--error-500);
}

/* List Group Active State - Fix Text Visibility */
.list-group-item.active {
  background-color: var(--primary-600) !important;
  border-color: var(--primary-600) !important;
}

.list-group-item.active .text-primary,
.list-group-item.active .fw-semibold {
  color: white !important;
}

.list-group-item.active .text-muted,
.list-group-item.active .small {
  color: rgba(255, 255, 255, 0.8) !important;
}

.list-group-item.active .text-danger {
  color: #fecaca !important; /* Light red for better contrast on blue */
}

/* List Group Hover State */
.list-group-item-action:hover:not(.active) {
  background-color: var(--bg-tertiary);
  transition: background-color var(--transition-fast);
}

/* List Group - Active State Badge Override */
.list-group-item.active .badge {
  background-color: rgba(255, 255, 255, 0.2) !important;
  color: white !important;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

/* Modern Form Styles */
.form-control {
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  transition: all var(--transition-fast);
  background-color: var(--bg-primary);
}

.form-control:focus {
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgb(59 130 246 / 0.1);
  outline: none;
}

.form-control:disabled {
  background-color: var(--bs-secondary-bg);
  opacity: 1;
  color: var(--text-inverse);
}

.form-label {
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

/* Spinner Styles */
  #spinner-container {
    position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(4px);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
  }

  .spinner-border {
    width: 3rem;
    height: 3rem;
  color: var(--primary-600);
  }

/* Steps Card Enhancement */
  .steps-card {
    border: none;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  background: var(--bg-primary);
  overflow: hidden;
  position: relative;
}

.steps-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-400), var(--primary-600));
}

  .steps-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

/* Navigation Tabs */
  .nav-tabs {
    display: flex;
  gap: var(--space-lg);
  border-bottom: 1px solid var(--border-light);
  margin-bottom: var(--space-xl);
    padding: 0;
    list-style: none;
  background: var(--bg-primary);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  padding: var(--space-md) var(--space-lg) 0;
  }
  
  .nav-item {
    margin-bottom: -1px;
  }
  
  .nav-link {
    display: block;
  padding: var(--space-md) var(--space-lg);
  color: var(--text-muted);
    text-decoration: none;
  font-size: 0.875rem;
    font-weight: 500;
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  transition: all var(--transition-fast);
  position: relative;
  }
  
  .nav-link:hover {
  color: var(--text-primary);
  background-color: var(--bg-tertiary);
  }
  
  .nav-link.active {
  color: var(--primary-600);
  background-color: var(--bg-primary);
  border-color: var(--border-light);
    font-weight: 600;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--primary-600);
}

/* Mobile Responsive Design */
  @media (max-width: 768px) {
    .sidebar {
      width: var(--sidebar-mobile-width);
    padding: var(--space-md) var(--space-sm);
  }
  
  .sidebar-header {
    padding: var(--space-md) var(--space-sm);
  }
  
  .sidebar-content {
    padding: var(--space-md) var(--space-sm);
  }
  
  .sidebar-nav-text,
  .sidebar-section-title,
  .sidebar-user-info {
      display: none;
    }
  
  .sidebar-nav-link {
    justify-content: center;
    padding: var(--space-md) var(--space-sm);
    min-height: 44px;
  }
  
  .sidebar-nav-icon {
    margin-right: 0;
  }
  
  .sidebar-submenu {
    margin-left: 0;
    border-left: none;
    padding-left: 0;
  }
  
  .sidebar-submenu .sidebar-nav-link {
    justify-content: center;
    padding: var(--space-sm);
  }
  
  .sidebar-user {
      justify-content: center;
    padding: var(--space-sm);
  }
  
  .sidebar-user-avatar {
    margin-right: 0;
    }
  
      #main-content {
    left: var(--sidebar-mobile-width);
  }
  
  .main-content-inner {
    padding: var(--space-lg);
  }
  
  .row.g-3 {
    flex-direction: column;
  }
  
  .col-md-6 {
    min-width: auto;
  }
}

/* Mobile Menu Toggle Button */
.mobile-menu-toggle {
  position: fixed;
  top: var(--space-md);
  left: var(--space-md);
  z-index: 1100;
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: var(--space-sm);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.mobile-menu-toggle:hover {
  background: var(--bg-tertiary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.mobile-menu-toggle i {
  font-size: 1.25rem;
}

/* Mobile Sidebar Overlay */
.mobile-sidebar-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.mobile-sidebar-overlay.show {
  opacity: 1;
  visibility: visible;
}

@media (max-width: 480px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
    z-index: 1000;
  }
  
  .sidebar.show {
    transform: translateX(0);
  }
  
  #main-content {
    left: 0;
  }
}

@media (min-width: 481px) {
  .mobile-menu-toggle {
    display: none !important;
  }
}

/* Dark mode support with improved contrast */
@media (prefers-color-scheme: dark) {
  :root {
    /* Improved text colors for better contrast */
    --text-primary: var(--neutral-50);      /* #fafafa - brighter for main text */
    --text-secondary: var(--neutral-200);   /* #e5e5e5 - brighter secondary text */
    --text-muted: var(--neutral-300);       /* #d4d4d4 - much brighter muted text */
    --text-inverse: var(--neutral-900);     /* #171717 - stays dark */
    
    /* Background colors remain the same */
    --bg-primary: var(--neutral-900);       /* #171717 - darkest for cards */
    --bg-secondary: var(--neutral-800);     /* #262626 - main app background */
    --bg-tertiary: var(--neutral-700);      /* #404040 - card headers, etc. */
    --bg-inverse: var(--neutral-100);       /* #f5f5f5 - light inverse */
    
    /* Improved border contrast */
    --border-light: var(--neutral-600);     /* #525252 - more visible borders */
    --border-medium: var(--neutral-500);    /* #737373 - medium borders */
    --border-strong: var(--neutral-400);    /* #a3a3a3 - strong borders */
    
    /* Dark mode semantic color backgrounds for alerts/cards */
    --primary-50: #1e3a8a;                  /* Dark blue background */
    --primary-100: #1e40af;                 /* Slightly lighter dark blue */
    --primary-200: #1d4ed8;                 /* Medium dark blue for borders */
    
    --success-50: #14532d;                  /* Dark green background */
    --success-200: #166534;                 /* Dark green border */
    
    --warning-50: #78350f;                  /* Dark orange background */
    --warning-200: #92400e;                 /* Dark orange border */
    
    --error-50: #7f1d1d;                    /* Dark red background */
    --error-200: #991b1b;                   /* Dark red border */
    
    /* Bootstrap 5 Color System - Dark Mode */
    --bs-secondary-color: var(--text-muted);
    --bs-primary-text-emphasis: var(--primary-400);
    --bs-success-text-emphasis: var(--success-400);
    --bs-danger-text-emphasis: var(--error-400);
    --bs-warning-text-emphasis: var(--warning-400);
    --bs-info-text-emphasis: var(--primary-400);
    --bs-light-text-emphasis: var(--neutral-200);
    --bs-dark-text-emphasis: var(--neutral-50);
    
    /* Dark mode background adjustments */
    --bs-primary-bg-subtle: var(--primary-900);
    --bs-secondary-bg-subtle: var(--neutral-700);
    --bs-success-bg-subtle: #0f3d20;
    --bs-danger-bg-subtle: #3d0f15;
    --bs-warning-bg-subtle: #3d2a0f;
    --bs-info-bg-subtle: var(--primary-900);
    --bs-light-bg-subtle: var(--neutral-700);
    --bs-dark-bg-subtle: var(--neutral-600);
    
    /* Dark mode border adjustments */
    --bs-primary-border-subtle: var(--primary-700);
    --bs-secondary-border-subtle: var(--neutral-600);
    --bs-success-border-subtle: #166534;
    --bs-danger-border-subtle: #991b1b;
    --bs-warning-border-subtle: #b45309;
    --bs-info-border-subtle: var(--primary-700);
    --bs-light-border-subtle: var(--neutral-600);
    --bs-dark-border-subtle: var(--neutral-500);
    
    /* Core dark mode colors */
    --bs-body-bg: var(--bg-secondary);
    --bs-border-color: var(--border-light);
    --bs-link-color: var(--primary-400);
    --bs-link-hover-color: var(--primary-300);
  }
  
  body {
    background-color: var(--bg-secondary);
  }
}

/* Custom positioning classes to avoid Bootstrap conflicts */
.dropdown-container {
  position: absolute;
  z-index: 9999;
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-md);
}

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1050;
  background: transparent; /* Transparent for dropdowns, can be overridden for modals */
}

.modal-body{
  padding: var(--space-xl) !important; 
  background-color: var(--bg-primary);
}

/* Ensure custom positioning always wins over Bootstrap */
.dropdown-container {
  position: absolute !important;
}

.modal-overlay {
  position: fixed !important;
}

/* Utility Classes */
.hover-lift:hover {
  transform: translateY(-2px);
  transition: transform var(--transition-fast);
}

.gradient-text {
  background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gradient {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 600;
  }

/* htmx indicator */
.htmx-indicator {
    display: none;
}
.htmx-request .htmx-indicator {
    display: inline-block;
}
.htmx-request.htmx-indicator {
    display: inline-block;
}



.logo-heading {
  font-family: var(--font-sans);
  color: var(--text-primary);
  font-weight: 400;
  font-size: 24px;
  letter-spacing: 0px;
  white-space: nowrap;
  line-height: 1;
  display: block;
}


[placeholder]::placeholder {
  color: var(--text-muted);   /* change text color */
  font-size: 0.9rem;          /* adjust font size */
  font-style: italic;         /* optional style */
  opacity: 1;                 /* some browsers reduce opacity by default */
}

/* Custom Scrollbar Styling */
.scrollable-container {
  scrollbar-width: thin;
  scrollbar-color: var(--neutral-300) var(--bg-secondary);
}

.scrollable-container::-webkit-scrollbar {
  width: 8px;
}

.scrollable-container::-webkit-scrollbar-track {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
}

.scrollable-container::-webkit-scrollbar-thumb {
  background: var(--neutral-300);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.scrollable-container::-webkit-scrollbar-thumb:hover {
  background: var(--neutral-400);
}

/* Scrollable Pipeline Runs Container */
.pipeline-runs-scroll {
  max-height: 400px;
  overflow-y: auto;
  overflow-x: hidden;
  padding-right: var(--space-xs);
  scrollbar-width: thin;
  scrollbar-color: var(--neutral-300) var(--bg-secondary);
}

.pipeline-runs-scroll::-webkit-scrollbar {
  width: 8px;
}

.pipeline-runs-scroll::-webkit-scrollbar-track {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
}

.pipeline-runs-scroll::-webkit-scrollbar-thumb {
  background: var(--neutral-300);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.pipeline-runs-scroll::-webkit-scrollbar-thumb:hover {
  background: var(--neutral-400);
}

/* Dark mode scrollbar */
@media (prefers-color-scheme: dark) {
  .pipeline-runs-scroll::-webkit-scrollbar-track,
  .scrollable-container::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
  }
  
  .pipeline-runs-scroll::-webkit-scrollbar-thumb,
  .scrollable-container::-webkit-scrollbar-thumb {
    background: var(--neutral-600);
  }
  
  .pipeline-runs-scroll::-webkit-scrollbar-thumb:hover,
  .scrollable-container::-webkit-scrollbar-thumb:hover {
    background: var(--neutral-500);
  }
}

/* Thumbnail Gallery Styling */
.thumbnail-card {
  transition: all var(--transition-fast);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

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

.thumbnail-card img {
  transition: transform var(--transition-normal);
}

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

/* Responsive thumbnail grid - automatically adjusts columns */
@media (max-width: 575px) {
  /* Mobile: 2 columns */
  .thumbnail-card {
    min-height: 160px;
  }
}

@media (min-width: 576px) and (max-width: 767px) {
  /* Small tablets: 3 columns */
  .thumbnail-card {
    min-height: 180px;
  }
}

@media (min-width: 768px) and (max-width: 991px) {
  /* Tablets: 4 columns */
  .thumbnail-card {
    min-height: 200px;
  }
}

@media (min-width: 992px) and (max-width: 1199px) {
  /* Desktop: 5 columns */
  .thumbnail-card {
    min-height: 220px;
  }
}

@media (min-width: 1200px) {
  /* Large desktop: 6 columns */
  .thumbnail-card {
    min-height: 240px;
  }
}

/* ========================================
   Reference Frame Upload & Selection
   ======================================== */

/* Reference Thumbnail Card */
.reference-thumbnail-card {
  position: relative;
  border-radius: var(--border-radius);
  overflow: hidden;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all 0.2s ease;
  width: 30%;
}

.reference-thumbnail-card:hover {
  border-color: var(--primary-200);
  transform: scale(1.02);
  box-shadow: var(--shadow-md);
}

.reference-radio:checked + .reference-thumbnail-label {
  border: 2px solid var(--primary-600);
  box-shadow: 0 0 0 3px var(--primary-100);
}

.reference-thumbnail-label {
  display: block;
  position: relative;
  margin: 0;
  cursor: pointer;
  aspect-ratio: 9/16;
  overflow: hidden;
  background: var(--neutral-100);
  border-radius: var(--border-radius);
  border: 2px solid transparent;
  transition: border-color 0.2s ease;
}

.reference-thumbnail-label img,
.reference-thumbnail-label video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.video-indicator {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 2rem;
  color: white;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
  pointer-events: none;
}

.reference-info {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-xs) var(--space-sm);
  background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
  color: white;
  font-size: 0.75rem;
}

/* Upload Zone */
.upload-zone {
  border: 2px dashed var(--border-light);
  border-radius: var(--border-radius);
  padding: var(--space-xl);
  text-align: center;
  transition: all 0.2s ease;
  cursor: pointer;
  background: var(--bg-secondary);
}

.upload-zone:hover {
  border-color: var(--primary-400);
  background: var(--primary-50);
}

.upload-zone.drag-over {
  border-color: var(--primary-600);
  background: var(--primary-100);
  transform: scale(1.02);
}

.upload-zone-label {
  display: block;
  cursor: pointer;
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.upload-zone-label i {
  display: block;
}

/* Upload Preview */
.upload-preview {
  padding: var(--space-md);
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius);
  background: var(--bg-primary);
}

.upload-preview .preview-thumbnail {
  flex-shrink: 0;
}

/* Responsive adjustments for reference thumbnails */
@media (max-width: 480px) {
  .reference-thumbnail-card {
    margin-bottom: var(--space-sm);
  }
  
  .upload-zone {
    padding: var(--space-lg);
  }
  
  .upload-zone-label i {
    font-size: 2rem !important;
  }
}