/**
 * Bootstrap 4 Override - Modern Professional Edition
 * Inspired by Bootstrap 5 and shadcn/ui design system
 * Enterprise-grade, mature, and atmospheric UI design
 */

/* ========================================
   1. CSS Variables - Modern Design Tokens
   ======================================== */
:root {
  /* Layout */
  --navbar-height: 64px;
  --sidebar-width: 260px;
  --sidebar-collapsed-width: 60px;

  /* Brand Colors - Professional Blue */
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #dbeafe;
  --primary-dark: #1e40af;
  --primary-50: #eff6ff;

  /* Status Colors - Modern Palette */
  --success: #10b981;
  --success-hover: #059669;
  --success-light: #d1fae5;
  --success-dark: #047857;

  --info: #0ea5e9;
  --info-hover: #0284c7;
  --info-light: #e0f2fe;
  --info-dark: #0369a1;

  --warning: #f59e0b;
  --warning-hover: #d97706;
  --warning-light: #fef3c7;
  --warning-dark: #b45309;

  --danger: #ef4444;
  --danger-hover: #dc2626;
  --danger-light: #fee2e2;
  --danger-dark: #b91c1c;

  /* Neutrals - Refined Gray Scale */
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --gray-950: #030712;

  /* Text Colors */
  --text-primary: #111827;
  --text-secondary: #4b5563;
  --text-muted: #6b7280;
  --text-light: #9ca3af;
  --text-white: #ffffff;

  /* Backgrounds */
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-tertiary: #f3f4f6;
  --bg-soft: #f8f9fa;
  --bg-hover: #f1f5f9;

  /* Borders */
  --border-color: #e5e7eb;
  --border-light: #f3f4f6;
  --border-dark: #d1d5db;

  /* Shadows - Layered Depth */
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Border Radius - Modern & Soft */
  --radius-sm: 0.375rem;    /* 6px */
  --radius-md: 0.5rem;      /* 8px */
  --radius-lg: 0.75rem;     /* 12px */
  --radius-xl: 1rem;        /* 16px */
  --radius-2xl: 1.5rem;     /* 24px */
  --radius-full: 9999px;

  /* Gradients - Subtle & Professional */
  --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
  --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
  --gradient-info: linear-gradient(135deg, #0ea5e9 0%, #0284c7 100%);
  --gradient-warning: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  --gradient-danger: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);

  /* Soft Badge/Tag Colors */
  --badge-soft-primary: rgba(37, 99, 235, 0.1);
  --badge-soft-success: rgba(16, 185, 129, 0.1);
  --badge-soft-info: rgba(14, 165, 233, 0.1);
  --badge-soft-warning: rgba(245, 158, 11, 0.1);
  --badge-soft-danger: rgba(239, 68, 68, 0.1);
}

/* ========================================
   2. Base Styles
   ======================================== */
* {
  box-sizing: border-box;
}

html {
  /* Always show scrollbar gutter to prevent layout shift when modal opens */
  overflow-y: scroll;
}

/* Prevent Bootstrap from adding padding-right when modal opens */
body.modal-open {
  padding-right: 0 !important;
}

/* Prevent Bootstrap from adding padding-right to fixed elements when modal opens */
body.modal-open .fixed-top,
body.modal-open .fixed-bottom,
body.modal-open .sticky-top,
body.modal-open .navbar,
body.modal-open #sidebar,
body.modal-open #file-control,
body.modal-open #file-control-bar {
  padding-right: 0 !important;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei",
    "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: #ffffff;
  padding-top: var(--navbar-height);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6,
.h1, .h2, .h3, .h4, .h5, .h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--gray-900);
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

h1, .h1 { font-size: 1.5rem; font-weight: 700; }      /* 24px - Modern page title */
h2, .h2 { font-size: 1.25rem; font-weight: 700; }    /* 20px */
h3, .h3 { font-size: 1.125rem; font-weight: 600; }   /* 18px */
h4, .h4 { font-size: 1rem; font-weight: 600; }       /* 16px */
h5, .h5 { font-size: 0.9375rem; font-weight: 600; }  /* 15px */
h6, .h6 { font-size: 0.875rem; font-weight: 600; }   /* 14px */

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-hover);
  text-decoration: none;
}

::selection {
  background-color: var(--primary-light);
  color: var(--primary);
}

strong {
  text-decoration: none !important;
  border: none !important;
  outline: none !important;
}

/* ========================================
   3. Navbar - Modern Enterprise Style (Premium Edition)
   ======================================== */
.navbar {
  height: var(--navbar-height);
  background: rgba(255, 255, 255, 0.95) !important;
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.02);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1030;
  padding: 0;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.98) !important;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
  border-bottom-color: rgba(0, 0, 0, 0.06);
}

.navbar .nav-container {
  max-width: 100%;
  padding: 0 2rem;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Brand Section */
.navbar-brand-wrapper {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-shrink: 0;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--text-primary) !important;
  letter-spacing: -0.03em;
  padding: 0;
  margin: 0;
  transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Switch to Standard Version Button */
.switch-version-btn {
  display: inline-flex !important;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  font-size: 1rem;
  color: var(--text-secondary);
  background: transparent;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--transition-base);
  cursor: pointer;
}

/* Hide on mobile devices */
@media (max-width: 991px) {
  .switch-version-btn {
    display: none !important;
  }
}

.switch-version-btn:hover {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
  transform: scale(1.05);
  text-decoration: none;
}

.switch-version-btn i {
  font-size: 1rem;
  transition: transform var(--transition-base);
}

.switch-version-btn:hover i {
  transform: rotate(180deg);
}

.navbar-brand:hover {
  transform: scale(1.02);
}

.navbar-brand .brand-logo {
  display: block;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  object-fit: cover;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.navbar-brand .brand-text {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.03em;
}

/* Mobile Toggle */
.navbar-toggler {
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.625rem 0.75rem;
  background: transparent;
  color: var(--text-secondary);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.navbar-toggler:hover {
  background: var(--bg-hover);
  border-color: var(--border-dark);
  color: var(--text-primary);
}

.navbar-toggler:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.08);
  border-color: var(--primary);
}

.navbar-toggler-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
}

/* Navigation Collapse */
.navbar-collapse {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-grow: 1;
}

/* Main Navigation */
.navbar-nav.main-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  flex-direction: row;
}

.navbar-nav.main-nav .nav-item {
  list-style: none;
}

.navbar-nav.main-nav .nav-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  transition: color 0.2s cubic-bezier(0.4, 0, 0.2, 1),
              background-color 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  white-space: nowrap;
  position: relative;
  letter-spacing: -0.01em;
  height: 40px;
}

.navbar-nav.main-nav .nav-link::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--primary);
  transform: translateX(-50%);
  transition: width 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 2px;
  pointer-events: none;
}

.navbar-nav.main-nav .nav-link:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
  text-decoration: none;
}

.navbar-nav.main-nav .nav-link:hover::before {
  width: calc(100% - 2rem);
}

.navbar-nav.main-nav .nav-link.active {
  color: var(--primary);
  background: var(--primary-light);
  font-weight: 600;
}

.navbar-nav.main-nav .nav-link.active::before {
  width: calc(100% - 2rem);
  background: var(--primary);
}

.navbar-nav.main-nav .nav-link .nav-icon {
  flex-shrink: 0;
  color: currentColor;
  opacity: 0.75;
  font-size: 0.9375rem;
  transition: opacity 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.navbar-nav.main-nav .nav-link:hover .nav-icon,
.navbar-nav.main-nav .nav-link.active .nav-icon {
  opacity: 1;
}

.navbar-nav.main-nav .nav-link .nav-text {
  font-size: 0.9375rem;
  line-height: 1.5;
}

/* VIP Badge */
.nav-link-vip {
  position: relative;
}

.vip-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.1875rem 0.5rem;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #ffffff;
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  border-radius: var(--radius-full);
  box-shadow: 0 1px 3px rgba(245, 158, 11, 0.25);
}

/* Action Navigation (Right Side) */
.navbar-nav.action-nav {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  margin: 0;
  padding: 0;
  margin-left: auto;
}

.navbar-nav.action-nav .nav-item {
  list-style: none;
}

/* Icon Button */
.nav-link-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  background: transparent;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.nav-link-icon:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
  transform: scale(1.05);
}

.nav-link-icon .icon-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-link-icon .icon {
  color: currentColor;
  font-size: 1.125rem;
}

/* Notification Badge */
.notification-badge {
  position: absolute;
  top: -3px;
  right: -3px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 0.3125rem;
  font-size: 0.6875rem;
  font-weight: 700;
  color: #ffffff;
  background: var(--danger);
  border: 2px solid var(--bg-primary);
  border-radius: var(--radius-full);
  line-height: 1;
  box-shadow: 0 2px 4px rgba(239, 68, 68, 0.3);
  transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.notification-badge:empty {
  display: none;
}

.nav-link-icon:hover .notification-badge {
  transform: scale(1.1);
}

/* User Profile Link */
.user-menu-item {
  position: relative;
}

.user-profile-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.375rem 0.875rem;
  border-radius: var(--radius-md);
  color: var(--text-primary);
  background: transparent;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
}

.user-profile-link:hover {
  background: var(--bg-hover);
  text-decoration: none;
  color: var(--text-primary);
}

.user-avatar-wrapper {
  position: relative;
  flex-shrink: 0;
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  object-fit: cover;
  border: 2px solid var(--border-light);
  background: var(--bg-soft);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.user-profile-link:hover .user-avatar {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.user-name {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-primary);
  max-width: 150px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  letter-spacing: -0.01em;
}

.chevron-icon {
  flex-shrink: 0;
  color: var(--text-muted);
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  font-size: 0.875rem;
}

.user-profile-link[aria-expanded="true"] .chevron-icon {
  transform: rotate(180deg);
}

/* Dropdown Menu Modern */
.dropdown-menu-modern {
  min-width: 240px;
  padding: 0.5rem;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.04);
  margin-top: 0.625rem;
  background: var(--bg-primary);
}

.dropdown-menu-modern .dropdown-item {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-primary);
  transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  letter-spacing: -0.01em;
}

.dropdown-menu-modern .dropdown-item:hover {
  background: var(--bg-hover);
  color: var(--primary);
}

.dropdown-menu-modern .dropdown-item:active {
  background: var(--primary-light);
}

.dropdown-menu-modern .dropdown-divider {
  margin: 0.5rem 0;
  border-top: 1px solid var(--border-light);
}

/* ========================================
   User Menu Modern Styles
   ======================================== */

/* User Menu Container */
.user-menu-modern {
  min-width: 320px;
  max-width: 360px;
}

/* User Header Section */
.user-menu-header {
  padding: 1rem;
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  margin: -0.5rem -0.5rem 0.75rem -0.5rem;
}

.user-menu-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 3px solid white;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  object-fit: cover;
}

.user-menu-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.125rem;
}

.user-menu-group {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
}

/* User Menu Cards */
.user-menu-card {
  padding: 0.875rem;
  background: var(--bg-soft);
  border-radius: var(--radius-md);
  margin-bottom: 0.75rem;
  border: 1px solid var(--border-light);
  transition: all 0.2s ease;
}

.user-menu-card:hover {
  background: var(--bg-hover);
  border-color: var(--primary-light);
}

/* Card Title */
.user-menu-card-title {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.user-menu-card-title i {
  font-size: 0.9375rem;
}

/* Card Header (for storage cards) */
.user-menu-card-header {
  margin-bottom: 0.75rem;
}

.card-header-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Info Items */
.user-menu-info-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border-lighter);
}

.user-menu-info-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.user-menu-info-item:first-child {
  padding-top: 0;
}

.info-label {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.info-value {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* Storage Info */
.storage-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.storage-stats {
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
  font-size: 0.875rem;
}

.storage-used {
  font-weight: 600;
  color: var(--text-primary);
}

.storage-divider {
  color: var(--text-muted);
  margin: 0 0.125rem;
}

.storage-total {
  color: var(--text-secondary);
  font-size: 0.8125rem;
}

.storage-percent {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
}

/* Storage Progress Bar */
.storage-progress {
  height: 8px;
  background: var(--gray-200);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.storage-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary) 0%, #60a5fa 100%);
  transition: width 0.3s ease;
  border-radius: 4px;
}

.storage-progress-bar.bg-danger {
  background: linear-gradient(90deg, #ef4444 0%, #dc2626 100%);
}

.storage-progress-bar.bg-success {
  background: linear-gradient(90deg, var(--success) 0%, #10b981 100%);
}

/* Storage Remaining Info */
.storage-remaining {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.storage-remaining small {
  font-size: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

/* Button Overrides for User Menu */
.user-menu-card .btn-sm {
  padding: 0.25rem 0.625rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
}

/* Responsive Navigation */
@media (max-width: 991px) {
  .navbar .nav-container {
    padding: 0 1.25rem;
  }

  .navbar-collapse {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-top: 1px solid var(--border-light);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    padding: 1rem 1.25rem;
    display: block;
  }

  .navbar-nav.main-nav {
    flex-direction: column;
    align-items: stretch;
    gap: 0.375rem;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-light);
  }

  .navbar-nav.main-nav .nav-link {
    width: 100%;
    justify-content: flex-start;
    padding: 0.875rem 1rem;
  }

  .navbar-nav.main-nav .nav-link::before {
    display: none;
  }

  .navbar-nav.action-nav {
    flex-direction: column;
    align-items: stretch;
    gap: 0.375rem;
  }

  .nav-link-icon {
    width: 100%;
    justify-content: flex-start;
    padding: 0.875rem 1rem;
    height: auto;
  }

  .nav-link-icon .icon-wrapper {
    margin-right: 0.75rem;
  }

  .user-profile-link {
    width: 100%;
    justify-content: space-between;
    padding: 0.875rem 1rem;
  }

  .user-name {
    max-width: none;
    display: inline !important;
  }

  .chevron-icon {
    display: inline !important;
  }

  .dropdown-menu-modern {
    position: static !important;
    transform: none !important;
    box-shadow: none;
    border: none;
    margin-top: 0.5rem;
    padding: 0;
    background: transparent;
  }

  .dropdown-menu-modern .dropdown-item {
    padding: 0.75rem 1.25rem;
  }
}

/* === Mobile Navbar Actions === */
.navbar-actions-mobile {
  display: none;
  align-items: center;
  gap: 0.75rem;
}

@media (max-width: 991px) {
  .navbar-actions-mobile {
    display: flex !important;
  }
}

.navbar-actions-mobile .nav-link-icon {
  position: relative;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.5rem;
  color: var(--text-secondary);
  transition: background-color 0.15s ease, color 0.15s ease;
  text-decoration: none;
}

.navbar-actions-mobile .nav-link-icon:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

.navbar-actions-mobile .icon-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.navbar-actions-mobile .icon {
  font-size: 1.25rem;
}

.navbar-actions-mobile .notification-badge {
  position: absolute;
  top: -6px;
  right: -6px;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  background: var(--danger);
  color: #fff;
  font-size: 0.625rem;
  font-weight: 700;
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 4px rgba(239, 68, 68, 0.3);
}

.user-avatar-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid var(--border-light);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
  text-decoration: none;
}

.user-avatar-link:hover {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.user-avatar-mobile {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Small screen adjustments */
@media (max-width: 576px) {
  .navbar .nav-container {
    padding: 0 1rem;
    gap: 0.5rem;
  }

  .navbar-brand .brand-text {
    font-size: 1rem;
  }

  .navbar-brand .brand-logo {
    display: block;
    width: 32px;
    height: 32px;
  }
}

/* Navbar enhancements */
.navbar-nav .nav-link:focus {
  outline: none;
}

.navbar-nav .nav-link:focus-visible {
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Smooth transitions for dropdown */
.dropdown-menu {
  transition: opacity 0.15s ease-in-out;
}

.dropdown-menu.show {
  animation: none;
}

/* ========================================
   4. Sidebar - Modern Elegant Design (Collapsible)
   ======================================== */
.sidebar,
#sidebar {
  position: fixed;
  top: var(--navbar-height);
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background-color: var(--bg-primary);
  border-right: 1px solid var(--border-light);
  overflow-y: auto;
  overflow-x: hidden;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.02);
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1020;
}

/* Sidebar Collapsed State (Desktop) */
body.sidebar-collapsed .sidebar,
body.sidebar-collapsed #sidebar {
  width: var(--sidebar-collapsed-width);
}

/* Sidebar Collapsed - Hide Text */
body.sidebar-collapsed .sidebar .list-group-item span,
body.sidebar-collapsed .sidebar .nav-link span,
body.sidebar-collapsed #sidebar .list-group-item span,
body.sidebar-collapsed #sidebar .nav-link span {
  display: none;
}

/* Sidebar Collapsed - Center Icons */
body.sidebar-collapsed .sidebar .list-group-item,
body.sidebar-collapsed .sidebar .nav-link,
body.sidebar-collapsed #sidebar .list-group-item,
body.sidebar-collapsed #sidebar .nav-link {
  justify-content: center;
  padding: 0.75rem 0.5rem;
}

body.sidebar-collapsed .sidebar .list-group-item i,
body.sidebar-collapsed .sidebar .nav-link i,
body.sidebar-collapsed #sidebar .list-group-item i,
body.sidebar-collapsed #sidebar .nav-link i {
  margin-right: 0 !important;
  margin-left: 0 !important;
  width: 20px;
  text-align: center;
}

/* Hide download sections when sidebar is collapsed */
body.sidebar-collapsed .sidebar .sidebar-download-section,
body.sidebar-collapsed #sidebar .sidebar-download-section {
  display: none;
  opacity: 0;
  height: 0;
  overflow: hidden;
  margin: 0;
  padding: 0;
}

/* Smooth transition for download sections */
.sidebar-download-section {
  transition: opacity var(--transition-base), height var(--transition-base);
}

/* List Group Navigation - Modern Style */
.list-group-flush {
  padding: 0.75rem;
}

.list-group-item {
  border: none !important;
  border-radius: var(--radius-md) !important;
  padding: 0.75rem 1rem;
  margin-bottom: 0.25rem;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  transition: color 0.2s cubic-bezier(0.4, 0, 0.2, 1),
              background-color 0.2s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.2s cubic-bezier(0.4, 0, 0.2, 1),
              box-shadow 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  align-items: center;
  height: 44px;
}

.list-group-item:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
  text-decoration: none;
}

.list-group-item.active {
  background-color: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
  box-shadow: 0 1px 3px rgba(37, 99, 235, 0.1);
}

.list-group-item i {
  width: 20px;
  text-align: center;
  font-size: 1rem;
  flex-shrink: 0;
  opacity: 0.75;
  transition: opacity 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.list-group-item:hover i,
.list-group-item.active i {
  opacity: 1;
}

.list-group-item span {
  line-height: 1.5;
}

/* Sidebar Sections */
.sidebar-section,
.px-3.py-3 {
  padding: 1.25rem 1rem;
  border-top: 1px solid var(--border-light);
  margin: 0;
}

.sidebar-section-header,
.d-flex.align-items-center.mb-2 {
  display: flex;
  align-items: center;
  margin-bottom: 0.875rem;
  font-weight: 600;
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.sidebar-section-header img,
.d-flex.align-items-center.mb-2 img {
  width: 20px;
  height: 20px;
  margin-right: 0.625rem;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

/* Button Groups in Sidebar */
.btn-group-sm .btn {
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius-md);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.375rem;
}

.btn-group-sm .btn:first-child {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}

.btn-group-sm .btn:last-child {
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
  margin-left: -1px;
}

.btn-group-sm .btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 4px rgba(37, 99, 235, 0.15);
  z-index: 1;
}

/* Legacy Sidebar Support */
.sidebar .nav,
#sidebar .nav {
  padding: 0.75rem;
}

.sidebar .nav-link,
#sidebar .nav-link {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  font-weight: 500;
  padding: 0.75rem 1rem;
  margin-bottom: 0.25rem;
  border-radius: var(--radius-md);
  transition: color 0.2s cubic-bezier(0.4, 0, 0.2, 1),
              background-color 0.2s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  align-items: center;
  height: 44px;
}

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

.sidebar .nav-link.active,
#sidebar .nav-link.active {
  background-color: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
  box-shadow: 0 1px 3px rgba(37, 99, 235, 0.1);
  transform: translateX(0);
}

.sidebar .nav-link i,
#sidebar .nav-link i {
  width: 20px;
  margin-right: 0.875rem;
  text-align: center;
  font-size: 1rem;
  flex-shrink: 0;
  opacity: 0.75;
  transition: opacity 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar .nav-link:hover i,
.sidebar .nav-link.active i,
#sidebar .nav-link:hover i,
#sidebar .nav-link.active i {
  opacity: 1;
}

/* Focus states for accessibility */
.list-group-item:focus {
  outline: none;
}

.list-group-item:focus-visible {
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
  outline: 2px solid var(--primary);
  outline-offset: -2px;
}

/* Smooth scrollbar for sidebar */
.sidebar::-webkit-scrollbar,
#sidebar::-webkit-scrollbar {
  width: 6px;
}

.sidebar::-webkit-scrollbar-track,
#sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar::-webkit-scrollbar-thumb,
#sidebar::-webkit-scrollbar-thumb {
  background: var(--gray-300);
  border-radius: var(--radius-full);
}

.sidebar::-webkit-scrollbar-thumb:hover,
#sidebar::-webkit-scrollbar-thumb:hover {
  background: var(--gray-400);
}

/* ========================================
   5. Main Content Area - Modern Atmospheric Design
   ======================================== */
.main-content {
  margin-left: var(--sidebar-width);
  background: #ffffff;
  min-height: calc(100vh - var(--navbar-height));
  padding: 0;
  display: flex;
  flex-direction: column;
  transition: margin-left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Main Content - Sidebar Collapsed */
body.sidebar-collapsed .main-content {
  margin-left: var(--sidebar-collapsed-width);
}

/* Remove .bg-light override - use white background */
.main-content.bg-light {
  background: #ffffff !important;
}

/* Container Styles - Bootstrap 4 Standard */
.page-content-area {
  background-color: #ffffff;
  border: none;
  border-radius: 0;
  box-shadow: none;
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* VIP Page Container - Unified Width System */
/* Following modern SaaS design patterns (Stripe, Linear, Vercel) */
.vip-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

/* Responsive padding for mobile devices */
@media (max-width: 768px) {
  .vip-container {
    padding: 0 var(--space-3);
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .vip-container {
    padding: 0 var(--space-5);
  }
}

/* ========================================
   6. Page Header - Modern Breadcrumb Style
   ======================================== */
.page-header {
  margin-bottom: 2rem;
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.25rem;        /* 20px - Larger, more prominent */
  color: var(--text-muted);
  margin-bottom: 0;
  flex-wrap: wrap;
  line-height: 1.4;
}

.breadcrumb-item {
  color: var(--text-secondary);
  font-weight: 500;
  letter-spacing: -0.01em;
}

.breadcrumb-item.current {
  color: var(--text-primary);
  font-weight: 700;          /* Bold for current page */
}

.breadcrumb-separator {
  color: var(--border-dark);
  user-select: none;
  font-weight: 300;
}

/* Page Header with Actions */
.page-header-with-actions {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.page-header-with-actions .page-header {
  margin-bottom: 0;
  flex: 1;
  min-width: 0;
}

.page-header-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* ========================================
   7. Cards - Elevated Design
   ======================================== */
.card {
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.5rem;
  overflow: hidden;
  transition: all var(--transition-base);
}

.card:hover {
  /* Removed hover effect to prevent table floating */
  /* box-shadow: var(--shadow-md); */
  /* transform: translateY(-2px); */
}

.card.position-relative,
.card:has(.position-absolute) {
  overflow: visible !important;
}

.card-header {
  background: transparent;
  border-bottom: 1px solid var(--border-light);
  padding: 1.25rem 1.5rem;
  font-weight: 600;
  font-size: 1.125rem;
  color: var(--text-primary);
}

.card-body {
  padding: 1.5rem;
}

/* Gradient Cards */
.bg-gradient-primary {
  background: var(--gradient-primary) !important;
  border: none;
  color: var(--text-white) !important;
}

.bg-gradient-success {
  background: var(--gradient-success) !important;
  border: none;
  color: var(--text-white) !important;
}

.bg-gradient-info {
  background: var(--gradient-info) !important;
  border: none;
  color: var(--text-white) !important;
}

.bg-gradient-warning {
  background: var(--gradient-warning) !important;
  border: none;
  color: var(--text-white) !important;
}

.bg-gradient-danger {
  background: var(--gradient-danger) !important;
  border: none;
  color: var(--text-white) !important;
}

[class*="bg-gradient"] h1,
[class*="bg-gradient"] h2,
[class*="bg-gradient"] h3,
[class*="bg-gradient"] h4,
[class*="bg-gradient"] h5,
[class*="bg-gradient"] h6,
[class*="bg-gradient"] p,
[class*="bg-gradient"] span {
  color: var(--text-white) !important;
}

.card-deck {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

/* ========================================
   7. Tables - DataTables Modern Style
   ======================================== */
.table {
  font-size: 0.9375rem;
  background-color: var(--bg-primary);
  overflow: hidden;
}

.table thead th {
  background: transparent;
  border: none;
  font-weight: 600;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  padding: 1rem 1.25rem;
  white-space: nowrap;
}

.table tbody tr {
  border: none;
  transition: background-color var(--transition-fast);
}

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

.table tbody tr:last-child {
  border: none;
}

.table tbody td {
  padding: 1rem 1.25rem;
  vertical-align: middle;
  color: var(--text-primary);
  border: none;
}

/* DataTables Wrapper */
.dataTables_wrapper {
  padding: 0;
  background-color: transparent;
  border-radius: 0;
  border: none;
  overflow: hidden;
}

.dataTables_wrapper .row:first-child {
  padding: 1.25rem 1.5rem 1rem;
  border-bottom: none;
  border: none;
  background: transparent;
}

/* DataTables Length Control */
.dataTables_length label {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.dataTables_length select,
.dataTables_length .custom-select,
.dataTables_length .form-control {
  height: 40px !important;
  min-width: 80px;
  padding: 0.5rem 2.5rem 0.5rem 1rem !important;
  font-size: 0.9375rem !important;
  border: 1.5px solid var(--border-color) !important;
  border-radius: var(--radius-md) !important;
  background: var(--bg-primary) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 14 14'%3E%3Cpath fill='%236b7280' d='M7 9L3 5h8z'/%3E%3C/svg%3E") no-repeat right 0.75rem center !important;
  background-size: 14px !important;
  appearance: none !important;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-weight: 500;
  color: var(--text-primary);
}

.dataTables_length select:hover,
.dataTables_length .custom-select:hover,
.dataTables_length .form-control:hover {
  border-color: var(--border-dark) !important;
  background-color: var(--bg-hover) !important;
}

.dataTables_length select:focus,
.dataTables_length .custom-select:focus,
.dataTables_length .form-control:focus {
  outline: none !important;
  border-color: var(--primary) !important;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1) !important;
  background-color: var(--bg-primary) !important;
}

/* DataTables Search */
.dataTables_filter label {
  display: block;
  position: relative;
  width: 100%;
  max-width: 280px;
  margin-left: auto;
  margin-bottom: 0;
}

.dataTables_filter input,
.dataTables_filter .form-control {
  width: 100%;
  height: 40px;
  padding: 0.5rem 1rem 0.5rem 2.75rem;
  font-size: 0.9375rem;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-full);
  background: var(--bg-primary);
  transition: all var(--transition-fast);
  font-weight: 500;
  color: var(--text-primary);
}

.dataTables_filter input:hover,
.dataTables_filter .form-control:hover {
  border-color: var(--border-dark);
  background-color: var(--bg-hover);
}

.dataTables_filter input:focus,
.dataTables_filter .form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
  background-color: var(--bg-primary);
}

.dataTables_filter input::placeholder,
.dataTables_filter .form-control::placeholder {
  color: var(--text-muted);
  font-weight: 400;
}

.dataTables_filter label::before {
  content: "";
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16' fill='none'%3E%3Cpath d='M15 15L10.5 10.5M12 7C12 9.76142 9.76142 12 7 12C4.23858 12 2 9.76142 2 7C2 4.23858 4.23858 2 7 2C9.76142 2 12 4.23858 12 7Z' stroke='%236b7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-size: contain;
  background-repeat: no-repeat;
  pointer-events: none;
  opacity: 0.6;
}

/* DataTables Info & Pagination */
.dataTables_wrapper .row:last-child {
  padding: 1rem 1.5rem;
  border-top: none;
  border: none;
  background: transparent;
}

.dataTables_info {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: 500;
}

.dataTables_paginate {
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.dataTables_paginate .pagination {
  margin: 0;
  gap: 0.375rem;
}

.dataTables_paginate .page-link {
  min-width: 40px;
  height: 40px;
  padding: 0.5rem 0.875rem;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  background-color: var(--bg-primary);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.dataTables_paginate .page-link:hover {
  border-color: var(--primary);
  background-color: var(--primary-light);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.dataTables_paginate .page-item.active .page-link {
  border-color: var(--primary);
  background-color: var(--primary);
  color: var(--text-white);
  box-shadow: var(--shadow-md);
  font-weight: 600;
}

.dataTables_paginate .page-item.disabled .page-link {
  border-color: var(--border-light);
  background-color: var(--bg-soft);
  color: var(--text-light);
  cursor: not-allowed;
  opacity: 0.6;
}

/* ========================================
   8. Buttons - Modern Elevated Style
   ======================================== */
.btn {
  font-weight: 600;
  font-size: 0.9375rem;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-md);
  border: 1.5px solid transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  cursor: pointer;
  transition: all var(--transition-base);
  line-height: 1.5;
  height: 44px;
  white-space: nowrap;
}

.btn:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

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

/* Primary Button - 白字蓝底 */
.btn-primary {
  background: var(--primary) !important;
  color: var(--text-white) !important;
  border-color: var(--primary) !important;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover,
.btn-primary:focus,
.btn-primary:active,
.btn-primary:not(:disabled):not(.disabled):active {
  background: var(--primary-hover) !important;
  border-color: var(--primary-hover) !important;
  color: var(--text-white) !important;
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

/* Success Button */
.btn-success {
  background: var(--success);
  color: var(--text-white);
  box-shadow: var(--shadow-sm);
}

.btn-success:hover {
  background: var(--success-hover);
  color: var(--text-white);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

/* Info Button */
.btn-info {
  background: var(--info);
  color: var(--text-white);
  box-shadow: var(--shadow-sm);
}

.btn-info:hover {
  background: var(--info-hover);
  color: var(--text-white);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

/* Warning Button */
.btn-warning {
  background: var(--warning);
  color: var(--text-white);
  box-shadow: var(--shadow-sm);
}

.btn-warning:hover {
  background: var(--warning-hover);
  color: var(--text-white);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

/* Danger Button */
.btn-danger {
  background: var(--danger);
  color: var(--text-white);
  box-shadow: var(--shadow-sm);
}

.btn-danger:hover {
  background: var(--danger-hover);
  color: var(--text-white);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

/* Secondary Button */
.btn-secondary {
  background: var(--gray-200);
  color: var(--text-primary);
  border-color: var(--gray-300);
}

.btn-secondary:hover {
  background: var(--gray-300);
  border-color: var(--gray-400);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

/* Light Button */
.btn-light {
  background: var(--bg-primary);
  color: var(--text-primary);
  border-color: var(--border-color);
}

.btn-light:hover {
  background: var(--bg-hover);
  border-color: var(--border-dark);
  color: var(--text-primary);
}

/* Outline Buttons */
.btn-outline-primary {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}

.btn-outline-primary:hover {
  background: var(--primary);
  color: var(--text-white);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

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

.btn-outline-secondary:hover {
  background: var(--gray-100);
  border-color: var(--gray-300);
  color: var(--text-primary);
}

.btn-outline-success {
  background: transparent;
  color: var(--success);
  border-color: var(--success);
}

.btn-outline-success:hover {
  background: var(--success);
  color: var(--text-white);
  box-shadow: var(--shadow-md);
}

.btn-outline-danger {
  background: transparent;
  color: var(--danger);
  border-color: var(--danger);
}

.btn-outline-danger:hover {
  background: var(--danger);
  color: var(--text-white);
  box-shadow: var(--shadow-md);
}

/* Button Sizes */
.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  border-radius: var(--radius-md);
  height: 36px;
}

.btn-lg {
  padding: 0.875rem 1.75rem;
  font-size: 1.0625rem;
  border-radius: var(--radius-lg);
}

.rounded-pill {
  border-radius: var(--radius-full);
}

/* ========================================
   9. Forms - Modern Input Design
   ======================================== */
.form-control {
  background: var(--bg-primary);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  font-size: 0.9375rem;
  color: var(--text-primary);
  transition: all var(--transition-fast);
  font-weight: 500;
  height: 44px;
  line-height: 1.5;
}

.form-control:hover {
  border-color: var(--border-dark);
  background-color: var(--bg-hover);
}

/* Textarea should not have fixed height */
textarea.form-control {
  height: auto;
  min-height: 100px;
  resize: vertical;
}

/* Select controls */
select.form-control {
  height: 44px;
  padding: 0.75rem 1rem;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 14 14'%3E%3Cpath fill='%236b7280' d='M7 9L3 5h8z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 14px;
  padding-right: 2.5rem;
  cursor: pointer;
}

select.form-control[multiple] {
  height: auto;
  background-image: none;
  padding-right: 1rem;
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
  outline: none;
  background-color: var(--bg-primary);
}

.form-control::placeholder {
  color: var(--text-muted);
  font-weight: 400;
}

.custom-select {
  background: var(--bg-primary) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 14 14'%3E%3Cpath fill='%236b7280' d='M7 9L3 5h8z'/%3E%3C/svg%3E") no-repeat right 1rem center;
  background-size: 14px;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.625rem 2.5rem 0.625rem 1rem;
  font-size: 0.9375rem;
  font-weight: 500;
  cursor: pointer;
  appearance: none;
  transition: all var(--transition-fast);
}

.custom-select:hover {
  border-color: var(--border-dark);
  background-color: var(--bg-hover);
}

.custom-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
  outline: none;
  background-color: var(--bg-primary);
}

.custom-control-input:checked ~ .custom-control-label::before {
  background-color: var(--primary);
  border-color: var(--primary);
}

.custom-checkbox .custom-control-label::before {
  border-radius: var(--radius-sm);
}

/* ========================================
   10. Badges - Modern Pill Style
   ======================================== */
.badge {
  font-weight: 600;
  padding: 0.375rem 0.75rem;
  font-size: 0.8125rem;
  border-radius: var(--radius-full);
  letter-spacing: 0.02em;
}

.badge-primary {
  background: var(--primary);
  color: var(--text-white);
}

.badge-success {
  background: var(--success);
  color: var(--text-white);
}

.badge-info {
  background: var(--info);
  color: var(--text-white);
}

.badge-warning {
  background: var(--warning);
  color: var(--text-white);
}

.badge-danger {
  background: var(--danger);
  color: var(--text-white);
}

.badge-secondary {
  background: var(--gray-300);
  color: var(--text-secondary);
}

/* Soft Badges */
.badge-soft-primary {
  background: var(--badge-soft-primary);
  color: var(--primary);
}

.badge-soft-success {
  background: var(--badge-soft-success);
  color: var(--success);
}

.badge-soft-info {
  background: var(--badge-soft-info);
  color: var(--info);
}

.badge-soft-warning {
  background: var(--badge-soft-warning);
  color: var(--warning);
}

.badge-soft-danger {
  background: var(--badge-soft-danger);
  color: var(--danger);
}

/* ========================================
   11. Alerts - Modern Notification Style
   ======================================== */
.alert {
  border: 1.5px solid transparent;
  border-radius: var(--radius-lg);
  padding: 1rem 1.25rem;
  font-size: 0.9375rem;
  font-weight: 500;
}

.alert-info {
  background: var(--info-light);
  color: var(--info-dark);
  border-color: var(--info);
}

.alert-success {
  background: var(--success-light);
  color: var(--success-dark);
  border-color: var(--success);
}

.alert-warning {
  background: var(--warning-light);
  color: var(--warning-dark);
  border-color: var(--warning);
}

.alert-danger {
  background: var(--danger-light);
  color: var(--danger-dark);
  border-color: var(--danger);
}

/* ========================================
   12. Modals - Modern Elevated Dialog
   ======================================== */
.modal-backdrop {
  background-color: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.modal-content {
  border: none;
  border-radius: var(--radius-xl);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15), 0 10px 20px rgba(0, 0, 0, 0.1);
  overflow: hidden;
}

.modern-modal {
  animation: modalSlideIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(-20px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.modal-dialog-centered {
  display: flex;
  align-items: center;
  min-height: calc(100% - 3.5rem);
}

.modal-header {
  padding: 1.75rem 2rem;
  border-bottom: 1px solid var(--border-light);
  background: var(--bg-soft);
}

.modal-title {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

/* Modal Icon */
.modal-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  flex-shrink: 0;
}

.bg-primary-light {
  background: var(--primary-light);
}

.bg-success-light {
  background: var(--success-light);
}

.bg-danger-light {
  background: #fee2e2;
}

.bg-warning-light {
  background: #fef3c7;
}

.bg-info-light {
  background: #dbeafe;
}

.modal-body {
  padding: 2rem;
}

.modal-footer {
  padding: 1.25rem 2rem;
  border-top: 1px solid var(--border-light);
  background: transparent;
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
}

.modal-header .close {
  padding: 0.5rem;
  margin: -0.5rem -0.5rem -0.5rem auto;
  font-size: 1.5rem;
  font-weight: 300;
  opacity: 0.5;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
}

.modal-header .close:hover {
  opacity: 1;
  background-color: var(--bg-hover);
  transform: scale(1.1);
}

/* Current Folder Card */
.current-folder-card {
  background: var(--bg-soft);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 1rem 1.25rem;
}

.folder-icon-wrapper {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  flex-shrink: 0;
}

.folder-icon-wrapper i {
  font-size: 1.5rem;
  color: var(--primary);
}

.folder-icon-wrapper img,
.file-icon-wrapper img {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

/* Current File/Folder Card in Modals */
.current-file-card,
.current-folder-card {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.current-file-card .flex-grow-1,
.current-folder-card .flex-grow-1 {
  min-width: 0;
  overflow: hidden;
}

.current-file-card .file-icon-wrapper,
.current-folder-card .folder-icon-wrapper {
  width: 48px !important;
  height: 48px !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  background: #fff !important;
  border-radius: var(--radius-md) !important;
  border: 1px solid var(--border-light) !important;
  flex-shrink: 0 !important;
}

/* For modals - more specific selector */
.modal-body .current-file-card .file-icon-wrapper,
.modal-body .current-folder-card .folder-icon-wrapper {
  width: 48px !important;
  height: 48px !important;
  background: #fff !important;
  border-radius: var(--radius-md) !important;
  border: 1px solid var(--border-light) !important;
}

/* Security Option Card */
.security-option-card {
  background: var(--bg-soft);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.security-option-card:hover {
  background: var(--bg-hover);
  border-color: var(--border-dark);
}

/* Modern Form Controls */
/* Modern form control variant - same as .form-control */
.form-control-modern {
  background: var(--bg-primary);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  font-size: 0.9375rem;
  color: var(--text-primary);
  transition: all var(--transition-fast);
  font-weight: 500;
  height: 44px;
  line-height: 1.5;
}

.form-control-modern:hover {
  border-color: var(--border-dark);
  background-color: var(--bg-hover);
}

.form-control-modern:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
  background-color: var(--bg-primary);
}

textarea.form-control-modern {
  height: auto;
  min-height: 100px;
  resize: vertical;
}

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

.form-text {
  font-size: 0.8125rem;
  margin-top: 0.375rem;
}

/* Custom Switch Enhancement */
.custom-switch .custom-control-label {
  cursor: pointer;
  user-select: none;
}

.custom-switch .custom-control-label::before {
  border: 1.5px solid var(--border-color);
  background-color: var(--gray-300);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.custom-switch .custom-control-input:checked ~ .custom-control-label::before {
  background-color: var(--primary);
  border-color: var(--primary);
}

.custom-switch .custom-control-label::after {
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Modal Responsive Design */
@media (max-width: 576px) {
  .modal-header {
    padding: 1.25rem 1.5rem;
  }

  .modal-body {
    padding: 1.5rem;
  }

  .modal-footer {
    padding: 1rem 1.5rem;
    flex-direction: column-reverse;
  }

  .modal-footer .btn {
    width: 100%;
  }

  .modal-icon {
    width: 36px;
    height: 36px;
    font-size: 1rem;
  }

  .modal-title {
    font-size: 1rem;
  }

  .current-folder-card,
  .current-file-card {
    padding: 0.875rem 1rem;
  }

  .current-folder-card .folder-icon-wrapper,
  .current-file-card .file-icon-wrapper {
    width: 40px;
    height: 40px;
  }

  .current-folder-card .folder-icon-wrapper i,
  .current-file-card .file-icon-wrapper i {
    font-size: 1.25rem;
  }

  .current-folder-card .folder-icon-wrapper img,
  .current-file-card .file-icon-wrapper img {
    width: 24px;
    height: 24px;
  }
}

/* ========================================
   13. Dropdowns - shadcn Style
   ======================================== */
.dropdown-menu {
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 0.5rem;
  margin-top: 0.5rem;
}

.dropdown-item {
  padding: 0.625rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-primary);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.dropdown-item:hover {
  background-color: var(--bg-hover);
  color: var(--primary);
}

.dropdown-item:active {
  background-color: var(--primary-light);
}

.dropdown-divider {
  border-top: 1px solid var(--border-light);
  margin: 0.5rem 0;
}

.dropdown-header {
  padding: 0.5rem 1rem;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

/* ========================================
   14. Scrollbar - Modern Minimal
   ======================================== */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-soft);
  border-radius: var(--radius-md);
}

::-webkit-scrollbar-thumb {
  background: var(--gray-400);
  border-radius: var(--radius-md);
  border: 2px solid var(--bg-soft);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--gray-500);
}

* {
  scrollbar-width: thin;
  scrollbar-color: var(--gray-400) var(--bg-soft);
}

/* ========================================
   15. Utility Classes
   ======================================== */

/* Gap Utilities (Bootstrap 4 doesn't have gap utilities) */
.gap-2 {
  gap: 0.5rem;
}

.gap-3 {
  gap: 1rem;
}

/* Text Colors */
.text-primary { color: var(--primary) !important; }
.text-secondary { color: var(--text-secondary) !important; }
.text-muted { color: var(--text-muted) !important; }
.text-success { color: var(--success) !important; }
.text-info { color: var(--info) !important; }
.text-warning { color: var(--warning) !important; }
.text-danger { color: var(--danger) !important; }
.text-white { color: var(--text-white) !important; }
.text-dark { color: var(--gray-900) !important; }

/* Background Colors */
.bg-primary { background-color: var(--primary) !important; }
.bg-success { background-color: var(--success) !important; }
.bg-info { background-color: var(--info) !important; }
.bg-warning { background-color: var(--warning) !important; }
.bg-danger { background-color: var(--danger) !important; }
.bg-light { background-color: var(--bg-tertiary) !important; }
.bg-soft { background-color: var(--bg-soft) !important; }
.bg-white { background-color: var(--bg-primary) !important; }

/* Shadows */
.shadow-none { box-shadow: none !important; }
.shadow-xs { box-shadow: var(--shadow-xs) !important; }
.shadow-sm { box-shadow: var(--shadow-sm) !important; }
.shadow { box-shadow: var(--shadow-md) !important; }
.shadow-md { box-shadow: var(--shadow-md) !important; }
.shadow-lg { box-shadow: var(--shadow-lg) !important; }
.shadow-xl { box-shadow: var(--shadow-xl) !important; }

/* Border Radius */
.rounded { border-radius: var(--radius-md) !important; }
.rounded-sm { border-radius: var(--radius-sm) !important; }
.rounded-lg { border-radius: var(--radius-lg) !important; }
.rounded-xl { border-radius: var(--radius-xl) !important; }
.rounded-soft { border-radius: var(--radius-lg) !important; }
.rounded-circle { border-radius: 50% !important; }
.rounded-pill { border-radius: var(--radius-full) !important; }
.rounded-capsule { border-radius: var(--radius-full) !important; }

/* Borders */
.border { border: 1px solid var(--border-color) !important; }
.border-0 { border: 0 !important; }
.border-top { border-top: 1px solid var(--border-color) !important; }
.border-bottom { border-bottom: 1px solid var(--border-color) !important; }
.border-left { border-left: 1px solid var(--border-color) !important; }
.border-right { border-right: 1px solid var(--border-color) !important; }

/* Display */
.d-none { display: none !important; }
.d-block { display: block !important; }
.d-flex { display: flex !important; }
.d-inline-flex { display: inline-flex !important; }

/* Position */
.position-relative { position: relative !important; }
.position-absolute { position: absolute !important; }

/* Flex */
.flex-column { flex-direction: column !important; }
.justify-content-center { justify-content: center !important; }
.justify-content-between { justify-content: space-between !important; }
.align-items-center { align-items: center !important; }

/* Text Alignment */
.text-center { text-align: center !important; }
.text-left { text-align: left !important; }
.text-right { text-align: right !important; }

/* Font Weight */
.font-weight-bold { font-weight: 700 !important; }
.font-weight-semibold { font-weight: 600 !important; }
.font-weight-normal { font-weight: 400 !important; }

/* Misc */
.overflow-hidden { overflow: hidden !important; }
.text-nowrap { white-space: nowrap !important; }
.w-100 { width: 100% !important; }

/* Font Sizes */
.fs--1 { font-size: 0.875rem !important; }
.fs-0 { font-size: 1rem !important; }
.fs-1 { font-size: 1.125rem !important; }

/* ========================================
   16. Responsive Design
   ======================================== */
@media (max-width: 1199px) {
  .main-content {
    padding: 1.5rem;
  }
}

@media (max-width: 991px) {
  .card-deck {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  }

  .page-content-area {
    padding: 1.5rem;
  }
}

@media (min-width: 769px) and (max-width: 991px) {
  /* Tablet: Default to collapsed sidebar (not applied to mobile < 768px) */
  body:not(.sidebar-mobile-open) .sidebar,
  body:not(.sidebar-mobile-open) #sidebar {
    width: var(--sidebar-collapsed-width);
  }

  body:not(.sidebar-mobile-open) .main-content {
    margin-left: var(--sidebar-collapsed-width);
  }

  body:not(.sidebar-mobile-open) #file-control,
  body:not(.sidebar-mobile-open) #file-control-bar {
    left: var(--sidebar-collapsed-width);
  }
}

@media (max-width: 768px) {
  /* Mobile: Modern Full-Screen Drawer */
  #sidebar,
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1060;
    box-shadow: none;
    overflow-y: auto;
    overflow-x: hidden;
  }

  #sidebar.show,
  .sidebar.show,
  body.sidebar-mobile-open #sidebar,
  body.sidebar-mobile-open .sidebar {
    transform: translateX(0);
    box-shadow: 2px 0 8px rgba(0, 0, 0, 0.1);
  }

  /* Add top padding to sidebar-nav for mobile header */
  #sidebar-nav {
    padding-top: 64px;
  }

  .main-content {
    margin-left: 0;
    padding: 0; /* Mobile: no outer padding, let inner container handle spacing */
  }

  /* Reset collapsed state on mobile */
  body.sidebar-collapsed .main-content {
    margin-left: 0;
  }

  .card-deck {
    grid-template-columns: 1fr;
  }

  .page-content-area {
    padding: 1.25rem;
    border-radius: var(--radius-lg);
  }

  /* Override Bootstrap's .container-fluid default padding */
  .page-content-area.container-fluid {
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }

  .dataTables_wrapper .row:first-child {
    flex-direction: column;
    gap: 1rem;
  }

  .dataTables_filter label {
    max-width: 100%;
  }

  /* Page Header - Mobile vertical layout */
  .page-header-with-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 1rem;
    margin-bottom: 1.5rem;
  }

  .page-header-with-actions .page-header {
    width: 100%;
  }

  /* Action buttons - compact mobile layout */
  .page-header-actions {
    width: 100%;
    gap: 0.5rem;
  }

  .page-header-actions .btn {
    flex: 1;
    min-width: 0;
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    white-space: nowrap;
  }

  /* Primary button stands out */
  .page-header-actions .btn-primary {
    flex: 1.5;
  }

  /* ========================================
     Share Dialog - Mobile optimizations
     ======================================== */

  /* Format options - hide on mobile, default to urlwithtitle (文件名+网址) */

  /* Hide button group */
  .link-mode-group {
    display: none !important;
  }

  /* Hide parent container (for modern browsers) */
  .modal-body .d-flex.justify-content-between.mb-3:has(.link-mode-group) {
    display: none !important;
  }

  /* Fallback: hide by position - the first d-flex after tabs is the format options */
  .modal-body .tab-content + .d-flex.mb-3,
  .modal-body #shareLinkTabs + .tab-content + .d-flex.mb-3 {
    display: none !important;
  }

  /* Tab navigation - smaller text */
  #shareLinkTabs .nav-link {
    font-size: 0.875rem;
    padding: 0.5rem 0.75rem;
  }

  #shareLinkTabs .nav-link .fa,
  #shareLinkTabs .nav-link i {
    display: none; /* Hide icons on small screens */
  }

  /* Modal header - compact */
  .modal-header .modal-icon {
    width: 36px !important;
    height: 36px !important;
    font-size: 1rem !important;
    margin-right: 0.75rem !important;
  }

  .modal-header .modal-title {
    font-size: 1.125rem;
  }

  .modal-header small {
    font-size: 0.75rem;
  }

  /* Ensure modal doesn't overflow */
  .modal-body {
    max-height: 70vh;
    overflow-y: auto;
  }
}

@media (max-width: 576px) {
  body {
    font-size: 13px;
  }

  .navbar {
    padding: 0.625rem 0;
  }

  .card {
    margin-bottom: 1rem;
    border-radius: 0.25rem;
  }

  .card-body {
    padding: 1rem;
  }

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

  .main-content {
    padding: 0;
  }

  .page-content-area {
    padding: 1rem;
  }

  /* Override Bootstrap's .container-fluid default padding */
  .page-content-area.container-fluid {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .h3 {
    font-size: 1.25rem;
  }

  /* Extra compact buttons on very small screens */
  .page-header-actions .btn {
    padding: 0.5rem 0.625rem;
    font-size: 0.8125rem;
  }

  /* Hide button icons to save space */
  .page-header-actions .btn .fa.mr-1,
  .page-header-actions .btn i.mr-1 {
    display: none;
  }

  /* Share Dialog - Extra compact on very small screens */
  #shareLinkTabs .nav-link {
    font-size: 0.8125rem;
    padding: 0.5rem;
  }

  .link-mode-group .btn {
    font-size: 0.875rem;
    padding: 0.625rem 0.875rem;
  }

  /* Modal body - more compact */
  .modal-body {
    padding: 1rem;
  }
}

/* ========================================
   17. Print Styles
   ======================================== */
@media print {
  .navbar,
  #sidebar,
  .sidebar,
  .btn,
  .alert,
  .dataTables_filter,
  .dataTables_length,
  .dataTables_paginate {
    display: none !important;
  }

  .main-content {
    margin-left: 0;
  }

  .page-content-area {
    box-shadow: none;
    border: 1px solid var(--border-color);
  }
}

/* ========================================
   18. Accessibility
   ======================================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }
}

/* Focus visible for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ========================================
   19. Loading States
   ======================================== */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-soft) 0%,
    var(--bg-secondary) 50%,
    var(--bg-soft) 100%
  );
  background-size: 200% 100%;
  animation: loading 1.5s ease-in-out infinite;
  border-radius: var(--radius-md);
}

@keyframes loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.spinner-border {
  border: 3px solid var(--border-light);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ========================================
   20. Hover & Focus Enhancements
   ======================================== */
.hover-lift {
  transition: transform var(--transition-base);
}

.hover-lift:hover {
  transform: translateY(-2px);
}

.hover-shadow {
  transition: box-shadow var(--transition-base);
}

.hover-shadow:hover {
  box-shadow: var(--shadow-lg);
}

/* ========================================
   File Control Bar - Fixed Control Bar
   ======================================== */

#file-control,
#file-control-bar {
  position: fixed;
  top: var(--navbar-height, 64px);
  left: var(--sidebar-width, 260px);
  right: 0;
  z-index: 1025; /* Below navbar (1030) but above sidebar (1020) */
  background: #ffffff;
  transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1),
              box-shadow 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: box-shadow;
  border-bottom: 2px solid var(--border-color, #dee2e6);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
}

/* File Control - Sidebar Collapsed */
body.sidebar-collapsed #file-control,
body.sidebar-collapsed #file-control-bar {
  left: var(--sidebar-collapsed-width, 60px);
}

/* Remove container padding to extend to edges */
#file-control .container-fluid,
#file-control-bar .container-fluid {
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* Control Bar Clean Styles */
#file-control .btn-sm,
#file-control-bar .btn-sm {
  font-size: 0.875rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

#file-control .btn-group-sm .btn,
#file-control-bar .btn-group-sm .btn {
  border-radius: 0;
}

#file-control .btn-group-sm .btn:first-child,
#file-control-bar .btn-group-sm .btn:first-child {
  border-radius: var(--radius-sm, 0.25rem) 0 0 var(--radius-sm, 0.25rem);
}

#file-control .btn-group-sm .btn:last-child,
#file-control-bar .btn-group-sm .btn:last-child {
  border-radius: 0 var(--radius-sm, 0.25rem) var(--radius-sm, 0.25rem) 0;
}

#file-control.scrolled,
#file-control-bar.scrolled {
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15) !important;
}

/* File Control Bar - Badge */
#file-control .badge,
#file-control-bar .badge {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
}

/* File Control Bar - Buttons */
#file-control .btn,
#file-control-bar .btn {
  display: inline-flex;
  align-items: center;
  transition: color 0.15s, background-color 0.15s;
}

#file-control .btn:hover,
#file-control-bar .btn:hover {
  /* No transform or shadow on hover - keep it simple */
}

#file-control .btn:active,
#file-control-bar .btn:active {
  /* No scale effect on click */
}

/* Desktop: Show desktop version, hide mobile version */
@media (min-width: 769px) {
  #file-control-bar .file-control-mobile {
    display: none !important;
  }
  #file-control-bar .d-none.d-md-block {
    display: block !important;
  }
}

/* File Control Bar - Responsive */
@media (max-width: 768px) {
  /* Mobile: Bottom Fixed Position (Thumb Zone) */
  #file-control,
  #file-control-bar {
    position: fixed;
    bottom: 0;
    top: auto;
    left: 0;
    right: 0;
    border-bottom: none;
    border-top: 1px solid var(--border-color, #dee2e6);
    box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.1);
    padding-bottom: env(safe-area-inset-bottom, 0);
  }

  /* Desktop version hidden on mobile */
  #file-control-bar .d-none.d-md-block {
    display: none !important;
  }

  /* Mobile version shown on mobile */
  #file-control-bar .file-control-mobile {
    display: block !important;
  }

  /* Mobile container adjustments */
  #file-control .container-fluid,
  #file-control-bar .container-fluid {
    padding-left: 1rem !important;
    padding-right: 1rem !important;
    padding-top: 0.75rem !important;
    padding-bottom: 0.75rem !important;
  }

  /* Keep clear selection button circular on mobile */
  #file-control .btn-clear-selection,
  #file-control-bar .btn-clear-selection {
    width: 32px !important;
    height: 32px !important;
    min-width: 32px !important;
    min-height: 32px !important;
    padding: 0 !important;
  }
}

/* Mobile Action Buttons - Grid Layout */
.mobile-action-buttons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
  width: 100%;
}

/* Recycle bin has only 2 buttons */
.mobile-action-buttons:has(> .btn-mobile-action:nth-child(2):last-child) {
  grid-template-columns: repeat(2, 1fr);
}

/* Mobile Action Button - Vertical Layout (Icon on Top) */
.btn-mobile-action {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.375rem;
  padding: 0.75rem 0.5rem;
  border-radius: var(--radius-md, 8px);
  border: none;
  background: var(--bg-secondary, #f3f4f6);
  color: var(--text-primary, #111827);
  font-size: 0.75rem;
  font-weight: 500;
  min-height: 64px;
  transition: transform 0.15s, background-color 0.15s, box-shadow 0.15s;
  cursor: pointer;
  /* Ensure touch target is at least 44x44px */
  min-width: 44px;
}

.btn-mobile-action i {
  font-size: 1.5rem;
  display: block;
}

.btn-mobile-action span {
  display: block;
  text-align: center;
  line-height: 1.2;
  word-break: break-word;
}

/* Mobile Button Variants */
.btn-mobile-primary {
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  color: white;
}

.btn-mobile-primary:hover,
.btn-mobile-primary:active {
  background: linear-gradient(135deg, #1d4ed8 0%, #1e40af 100%);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(37, 99, 235, 0.3);
}

.btn-mobile-success {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: white;
}

.btn-mobile-success:hover,
.btn-mobile-success:active {
  background: linear-gradient(135deg, #059669 0%, #047857 100%);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(16, 185, 129, 0.3);
}

.btn-mobile-danger {
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  color: white;
}

.btn-mobile-danger:hover,
.btn-mobile-danger:active {
  background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(239, 68, 68, 0.3);
}

.btn-mobile-secondary {
  background: var(--bg-secondary, #f3f4f6);
  color: var(--text-secondary, #6b7280);
  border: 1px solid var(--border-color, #dee2e6);
}

.btn-mobile-secondary:hover,
.btn-mobile-secondary:active {
  background: var(--bg-hover, #e5e7eb);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* Active state for all mobile buttons */
.btn-mobile-action:active {
  transform: translateY(0) scale(0.98);
}

/* Mobile: Hide "More Actions" modal backdrop properly */
@media (max-width: 768px) {
  #moreActionsModal .modal-dialog {
    margin: 0.5rem;
  }

  #moreActionsModal .list-group-item {
    padding: 1rem;
    font-size: 0.9375rem;
    border-radius: var(--radius-sm, 6px);
    margin-bottom: 0.25rem;
  }

  #moreActionsModal .list-group-item:hover {
    background-color: var(--bg-hover, #f3f4f6);
  }

  #moreActionsModal .list-group-item i {
    width: 20px;
    text-align: center;
  }
}

/* Clear Selection Button - Circular */
.btn-clear-selection {
  width: 32px;
  height: 32px;
  min-width: 32px;
  min-height: 32px;
  padding: 0;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid #dee2e6;
  background: white;
  color: #6c757d;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.btn-clear-selection:hover {
  background: #f8f9fa;
  border-color: #adb5bd;
  color: #495057;
}

.btn-clear-selection:active {
  background: #e9ecef;
  transform: scale(0.95);
}

.btn-clear-selection i {
  font-size: 14px;
  line-height: 1;
}

/* Ensure DataTables controls are always visible */
#table_files_wrapper > .row:first-child {
  display: flex !important;
  opacity: 1 !important;
  visibility: visible !important;
}

/* ========================================
   Sidebar Mobile Overlay Backdrop
   ======================================== */
.sidebar-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 1055;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1),
              visibility 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar-backdrop.show,
body.sidebar-mobile-open .sidebar-backdrop {
  opacity: 1;
  visibility: visible;
}

@media (min-width: 769px) {
  .sidebar-backdrop {
    display: none;
  }
}

/* ========================================
   Sidebar Toggle Button
   ======================================== */
.sidebar-toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: none;
  background: transparent;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.sidebar-toggle-btn:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.sidebar-toggle-btn i {
  font-size: 1.25rem;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Rotate icon when sidebar is collapsed (desktop only) */
@media (min-width: 992px) {
  body.sidebar-collapsed .sidebar-toggle-btn i {
    transform: rotate(180deg);
  }
}

/* ========================================
   Sidebar Tooltips (for collapsed state)
   ======================================== */
body.sidebar-collapsed .sidebar .list-group-item[data-toggle="tooltip"],
body.sidebar-collapsed #sidebar .list-group-item[data-toggle="tooltip"],
body.sidebar-collapsed .sidebar .nav-link[data-toggle="tooltip"],
body.sidebar-collapsed #sidebar .nav-link[data-toggle="tooltip"] {
  position: relative;
}

/* ========================================
   QR Code Floating Card
   ======================================== */
.qr-card {
  position: fixed;
  z-index: 1040;
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: 0;
  min-width: 200px;
  opacity: 0;
  visibility: hidden;
  transform: translateX(-10px) scale(0.95);
  transition: opacity var(--transition-base),
              transform var(--transition-base),
              visibility var(--transition-base);
  pointer-events: none;
}

.qr-card.show {
  opacity: 1;
  visibility: visible;
  transform: translateX(0) scale(1);
  pointer-events: auto;
}

.qr-card-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--border-light);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
}

.qr-card-header i {
  color: var(--primary);
  font-size: 1rem;
}

.qr-card-body {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.qr-card-body img {
  width: 150px;
  height: 150px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  background: var(--bg-primary);
  display: block;
}

.qr-card-hint {
  font-size: 0.8125rem;
  text-align: center;
  display: block;
  margin-top: 0.25rem;
}

/* Mobile responsive adjustments */
@media (max-width: 768px) {
  .qr-card {
    left: 50% !important;
    top: 50% !important;
    transform: translate(-50%, -50%) scale(0.95);
    max-width: 90vw;
  }

  .qr-card.show {
    transform: translate(-50%, -50%) scale(1);
  }

  .qr-card-body img {
    width: 180px;
    height: 180px;
  }
}

/* ========================================
   Utility Classes
   ======================================== */
.font-monospace {
  font-family: 'Menlo', 'Monaco', 'Courier New', monospace !important;
}

/* ========================================
   Upload Dialog - Modern Edition
   ======================================== */
.upload-dialog {
  position: fixed;
  right: 20px;
  bottom: 0;
  width: 640px;
  max-width: calc(100vw - 40px);
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-bottom: none;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.1),
              0 -2px 4px rgba(0, 0, 0, 0.06);
  z-index: 1030; /* Above sidebar, same level as navbar */
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
              opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.upload-dialog.hidden {
  transform: translateY(100%);
  opacity: 0;
  pointer-events: none;
}

.upload-dialog.collapsed .upload-dialog-body {
  display: none;
}

.upload-dialog.collapsed #upload_collapse i {
  transform: rotate(180deg);
}

/* Upload Dialog Header */
.upload-dialog-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
  color: white;
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  cursor: move; /* Draggable indicator */
}

.upload-dialog-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex: 1;
  min-width: 0;
}

.upload-dialog-title h5 {
  margin: 0;
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: white;
}

.upload-dialog-title i.fa {
  font-size: 1.125rem;
  opacity: 0.9;
}

.upload-count-badge {
  background: rgba(255, 255, 255, 0.2);
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-md);
  font-size: 0.8125rem;
  font-weight: 600;
}

.upload-info-text {
  opacity: 0.85;
  font-size: 0.8125rem;
  margin-left: 0.5rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
  min-width: 0;
}

/* Upload Dialog Toolbar */
.upload-dialog-toolbar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.upload-progress-wrapper {
  width: 120px;
  height: 6px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
}

.upload-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, #10b981 0%, #059669 100%);
  border-radius: var(--radius-full);
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.6);
}

.upload-action-btn {
  background: rgba(255, 255, 255, 0.15);
  border: none;
  color: white;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  padding: 0;
}

.upload-action-btn:hover {
  background: rgba(255, 255, 255, 0.25);
  transform: scale(1.05);
}

.upload-action-btn i {
  font-size: 0.875rem;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.upload-close-btn:hover {
  background: rgba(239, 68, 68, 0.9);
}

/* Upload Dialog Body */
.upload-dialog-body {
  max-height: 400px;
  overflow-y: auto;
  overflow-x: hidden;
  background: var(--bg-primary);
}

.upload-dialog-body::-webkit-scrollbar {
  width: 6px;
}

.upload-dialog-body::-webkit-scrollbar-track {
  background: var(--gray-100);
}

.upload-dialog-body::-webkit-scrollbar-thumb {
  background: var(--gray-300);
  border-radius: var(--radius-full);
}

.upload-dialog-body::-webkit-scrollbar-thumb:hover {
  background: var(--gray-400);
}

/* Plupload Queue Overrides */
.upload-dialog .plupload_container {
  background: transparent;
  border: none;
}

.upload-dialog .plupload_header {
  background: var(--gray-50);
  border-bottom: 1px solid var(--border-light);
  padding: 0.75rem 1rem;
}

.upload-dialog .plupload_file {
  border-bottom: 1px solid var(--border-light);
  padding: 0.75rem 1rem;
  transition: background-color 0.2s ease;
}

.upload-dialog .plupload_file:hover {
  background: var(--bg-hover);
}

.upload-dialog .plupload_file_name {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
}

.upload-dialog .plupload_file_size {
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.upload-dialog .plupload_file_status {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.upload-dialog .plupload_progress {
  height: 4px;
  background: var(--gray-200);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.upload-dialog .plupload_progress_bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary) 0%, var(--primary-hover) 100%);
  border-radius: var(--radius-full);
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Modern Upload List */
.modern-upload-list {
  padding: 0;
}

.upload-file-item {
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--border-light);
  transition: background-color 0.2s ease;
}

.upload-file-item:hover {
  background: var(--bg-hover);
}

.upload-file-item:last-child {
  border-bottom: none;
}

.upload-file-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}

.upload-file-name {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  flex: 1;
  min-width: 0;
  margin-right: 0.75rem;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.upload-file-name i {
  margin-right: 0.5rem;
  opacity: 0.75;
  color: var(--primary);
  flex-shrink: 0;
}

.upload-file-name .file-name-text {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
  min-width: 0;
}

.upload-file-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.upload-status-badge {
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-md);
  font-size: 0.75rem;
  font-weight: 600;
}

.upload-status-badge.uploading {
  background: var(--primary-light);
  color: var(--primary);
}

.upload-status-badge.completed {
  background: var(--success-light);
  color: var(--success);
}

.upload-status-badge.instant {
  background: var(--warning-light);
  color: var(--warning);
}

.upload-status-badge.failed {
  background: var(--danger-light);
  color: var(--danger);
}

.upload-file-progress-container {
  margin-top: 0.5rem;
}

.upload-file-progress-bar-wrapper {
  height: 4px;
  background: var(--gray-200);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: 0.25rem;
}

.upload-file-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary) 0%, var(--primary-hover) 100%);
  border-radius: var(--radius-full);
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.upload-file-progress-bar.completed {
  background: linear-gradient(90deg, var(--success) 0%, var(--success-hover) 100%);
}

.upload-file-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.upload-file-size {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.upload-file-speed {
  color: var(--success);
  font-weight: 500;
}

/* Empty state */
.upload-list-empty {
  padding: 2rem;
  text-align: center;
  color: var(--text-muted);
}

.upload-list-empty i {
  font-size: 2.5rem;
  opacity: 0.3;
  margin-bottom: 0.5rem;
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .upload-dialog {
    right: 10px;
    left: 10px;
    width: auto;
    max-width: none;
  }

  .upload-dialog-header {
    padding: 0.625rem 0.875rem;
  }

  .upload-dialog-title h5 {
    font-size: 0.875rem;
  }

  .upload-progress-wrapper {
    width: 80px;
  }

  .upload-dialog-body {
    max-height: 300px;
  }

  .upload-file-item {
    padding: 0.75rem;
  }

  .upload-file-name {
    font-size: 0.8125rem;
  }

  .upload-file-info {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }
}

/* ========================================
   Customer Help Widget - Modern Edition
   ======================================== */
.customer-help-widget {
  position: fixed;
  left: 20px;
  bottom: 20px;
  z-index: 1025; /* Above sidebar (1020) but below navbar (1030) */
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.customer-help-widget:hover {
  transform: translateY(-2px);
}

.help-widget-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
  color: white;
  padding: 0.875rem 1.25rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  position: relative;
}

.help-widget-header i.fa {
  font-size: 1.125rem;
}

.help-close-btn {
  background: rgba(255, 255, 255, 0.2);
  border: none;
  color: white;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-left: auto;
  padding: 0;
}

.help-close-btn:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: scale(1.1);
}

.help-close-btn i {
  font-size: 0.875rem;
}

/* Hover effect for widget */
.customer-help-widget:hover .help-widget-header {
  box-shadow: 0 25px 60px -15px rgba(37, 99, 235, 0.4),
              0 10px 25px -10px rgba(37, 99, 235, 0.3);
}

/* Animation on load */
@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.customer-help-widget {
  animation: slideInLeft 0.5s cubic-bezier(0.4, 0, 0.2, 1) 0.3s both;
}

/* Mobile responsive */
@media (max-width: 768px) {
  /* Hide help widget on mobile to avoid overlapping with bottom control bar */
  .customer-help-widget {
    display: none !important;
  }
}

/* ========================================
   End of Bootstrap Override Styles
   ======================================== */

/* Input Group Text - Fix border radius */
.input-group-text {
  border-top-left-radius: 0 !important;
  border-bottom-left-radius: 0 !important;
}