:root {
  /* Современная цветовая палитра */
  --primary: #6366f1;
  --primary-light: #a5b4fc;
  --primary-dark: #4f46e5;
  --secondary: #f1f5f9;
  --accent: #06b6d4;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  
  /* Нейтральные цвета */
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  
  /* Фоны */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --bg-card: rgba(255, 255, 255, 0.95);
  --bg-glass: rgba(255, 255, 255, 0.1);
  
  /* Тени */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Радиусы */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
}

/* Основные стили */
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-secondary);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 16px;
}

/* Градиентный фон */
.ui-bg {
  background: 
    radial-gradient(ellipse at top left, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse at bottom right, rgba(6, 182, 212, 0.1) 0%, transparent 50%),
    linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  min-height: 100vh;
}

/* Навигация */
.ui-topbar {
  background: var(--bg-card) !important;
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

.navbar-brand {
  font-weight: 700;
  color: var(--text-primary) !important;
  font-size: 1.25rem;
}

.nav-link {
  color: var(--text-secondary) !important;
  font-weight: 500;
  padding: 0.5rem 1rem !important;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.nav-link:hover {
  color: var(--primary) !important;
  background: rgba(99, 102, 241, 0.1);
}

.nav-link.active {
  color: var(--primary) !important;
  background: rgba(99, 102, 241, 0.1);
  font-weight: 600;
}

/* Заголовки */
.ui-head {
  margin-bottom: 2rem;
  text-align: center;
}

.ui-head h1, .ui-head h2 {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.ui-head .text-secondary {
  color: var(--text-secondary) !important;
  font-size: 1.1rem;
  font-weight: 400;
}

/* Карточки */
.ui-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-lg);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.ui-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--bg-gradient);
}

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

.ui-subcard {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition: all 0.2s ease;
}

.ui-subcard:hover {
  background: var(--bg-primary);
  border-color: var(--primary-light);
}

/* Списки */
.ui-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1rem;
}

.ui-list li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.ui-list li:hover {
  background: var(--bg-primary);
  transform: translateX(4px);
}

.ui-list li i {
  font-size: 1.2rem;
  width: 24px;
  text-align: center;
}

/* Кнопки */
.btn {
  border-radius: var(--radius-md);
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  border: none;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
}

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

.btn-outline-primary:hover {
  background: var(--primary);
  color: white;
  transform: translateY(-2px);
}

.btn-success {
  background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
  color: white;
  box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.1rem;
}

/* Формы */
.form-control, .form-select {
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  font-size: 1rem;
  transition: all 0.2s ease;
  background: var(--bg-primary);
}

.form-control:focus, .form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
  transform: translateY(-1px);
}

/* Drag & Drop зона */
.dropzone {
  border: 3px dashed var(--border);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: 3rem;
  text-align: center;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.dropzone::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(6, 182, 212, 0.05) 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.dropzone:hover::before,
.dropzone.dragover::before {
  opacity: 1;
}

.dropzone.dragover {
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.05);
  transform: scale(1.02);
  box-shadow: var(--shadow-lg);
}

.dropzone .dz-title {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.dropzone .dz-sub {
  color: var(--text-secondary);
  margin: 1rem 0;
  font-size: 1rem;
}

.dropzone input[type=file] {
  display: none;
}

/* Таблицы */
.table {
  background: var(--bg-primary);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.table thead th {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--border-light) 100%) !important;
  border: none !important;
  color: var(--text-primary);
  font-weight: 700;
  padding: 1rem;
  text-transform: uppercase;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
}

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

.table-hover tbody tr:hover {
  background-color: rgba(99, 102, 241, 0.05) !important;
  transform: scale(1.01);
  transition: all 0.2s ease;
}

/* Стеклянный эффект */
.glass {
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Обратная связь */
.feedback {
  background: var(--bg-secondary);
  border-left: 4px solid var(--primary);
  padding: 1.5rem;
  border-radius: var(--radius-md);
  line-height: 1.7;
  font-size: 1rem;
}

/* Бейджи */
.badge {
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.75rem;
  font-weight: 600;
  font-size: 0.875rem;
}

/* Анимации */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

/* Адаптивность */
@media (max-width: 768px) {
  .ui-card {
    padding: 1.5rem;
    margin: 0 1rem;
  }
  
  .ui-head h1, .ui-head h2 {
    font-size: 2rem;
  }
  
  .dropzone {
    padding: 2rem 1rem;
  }
  
  .btn-lg {
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
  }
}

/* Дополнительные утилиты */
.text-gradient {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.border-gradient {
  border: 2px solid transparent;
  background: linear-gradient(var(--bg-primary), var(--bg-primary)) padding-box,
              linear-gradient(135deg, var(--primary), var(--accent)) border-box;
}

.shadow-colored {
  box-shadow: 0 10px 25px rgba(99, 102, 241, 0.15);
}

/* Статусы */
.status-new { color: var(--primary); }
.status-progress { color: var(--warning); }
.status-approved { color: var(--success); }
.status-rejected { color: var(--danger); }
.status-completed { color: var(--success); }

/* Оптимизация таблицы админ-панели */
.admin-table {
  font-size: 0.875rem;
}

.admin-table .table td {
  padding: 0.5rem 0.25rem;
  vertical-align: middle;
}

.admin-table .table th {
  padding: 0.75rem 0.25rem;
  font-size: 0.8rem;
}

.admin-table .form-control-sm,
.admin-table .form-select-sm {
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
}

.admin-table .btn-sm {
  padding: 0.25rem;
  font-size: 0.75rem;
}

/* Адаптивные стили для таблицы */
@media (max-width: 1400px) {
  .admin-table .table {
    font-size: 0.8rem;
  }
  
  .admin-table .table td,
  .admin-table .table th {
    padding: 0.4rem 0.2rem;
  }
}

@media (max-width: 1200px) {
  .admin-table .table {
    font-size: 0.75rem;
  }
  
  .admin-table .form-control-sm,
  .admin-table .form-select-sm {
    font-size: 0.7rem;
    padding: 0.2rem 0.4rem;
  }
}

@media (max-width: 768px) {
  .admin-table {
    font-size: 0.7rem;
  }
  
  .admin-table .table {
    min-width: 800px !important;
  }
  
  .admin-table .table td,
  .admin-table .table th {
    padding: 0.3rem 0.15rem;
  }
  
  .admin-table .form-control-sm,
  .admin-table .form-select-sm {
    font-size: 0.65rem;
    padding: 0.15rem 0.3rem;
    width: auto !important;
  }
  
  .admin-table .btn-sm {
    width: 24px !important;
    height: 24px !important;
    padding: 0.15rem !important;
  }
  
  .admin-table .btn-sm i {
    font-size: 0.65rem !important;
  }
}