/* Enterprise PMS Styles */
:root {
  /* Light theme colors */
  --primary-color: #1976D2;
  --primary-light: #42A5F5;
  --primary-dark: #1565C0;
  --secondary-color: #00ACC1;
  --accent-color: #FF9800;
  --success-color: #4CAF50;
  --warning-color: #FF9800;
  --error-color: #F44336;
  --info-color: #2196F3;
  
  /* Neutral colors */
  --background: #F8F9FA;
  --surface: #FFFFFF;
  --surface-variant: #F5F5F5;
  --on-surface: #212121;
  --on-surface-variant: #757575;
  --outline: #E0E0E0;
  
  /* Text colors */
  --text-primary: #212121;
  --text-secondary: #757575;
  --text-disabled: #BDBDBD;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-xxl: 3rem;
  
  /* Border radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
}

/* Dark theme */
.dark-theme {
  --background: #121212;
  --surface: #1E1E1E;
  --surface-variant: #2A2A2A;
  --on-surface: #E0E0E0;
  --on-surface-variant: #BDBDBD;
  --outline: #404040;
  --text-primary: #E0E0E0;
  --text-secondary: #BDBDBD;
  --text-disabled: #757575;
}

/* Base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--background);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Layout */
.app-container {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 280px;
  background: var(--surface);
  border-right: 1px solid var(--outline);
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  left: 0;
  top: 0;
  z-index: 1000;
  transform: translateX(0);
  transition: transform var(--transition-normal);
}

.sidebar.collapsed {
  transform: translateX(-100%);
}

.sidebar-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--outline);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--primary-color);
}

.logo h2 {
  font-size: 1.25rem;
  font-weight: 600;
}

.sidebar-toggle {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
  display: none;
}

.sidebar-toggle:hover {
  background-color: var(--surface-variant);
}

.sidebar-content {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-lg);
}

.user-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--surface-variant);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
}

.user-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
}

.user-details h4 {
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
}

.user-role {
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-transform: capitalize;
}

.nav-menu {
  list-style: none;
}

.nav-menu li {
  margin-bottom: var(--spacing-sm);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-primary);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
  position: relative;
}

.nav-link:hover {
  background-color: var(--surface-variant);
}

.nav-link.active {
  background-color: var(--primary-color);
  color: white;
}

.notification-badge {
  background: var(--error-color);
  color: white;
  font-size: 0.75rem;
  padding: 2px 6px;
  border-radius: 10px;
  margin-left: auto;
  min-width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.main-content {
  flex: 1;
  margin-left: 280px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  transition: margin-left var(--transition-normal);
}

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

.top-bar {
  background: var(--surface);
  border-bottom: 1px solid var(--outline);
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 64px;
}

.top-bar-left {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.menu-btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  display: none;
}

.breadcrumb {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.top-bar-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.theme-toggle, .notification-btn, .user-btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  transition: background-color var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.theme-toggle:hover, .notification-btn:hover, .user-btn:hover {
  background-color: var(--surface-variant);
}

.notifications-dropdown, .user-dropdown {
  position: relative;
}

.notifications-panel, .user-menu {
  position: absolute;
  right: 0;
  top: 100%;
  background: var(--surface);
  border: 1px solid var(--outline);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  min-width: 300px;
  z-index: 1000;
  display: none;
}

.notifications-panel.show, .user-menu.show {
  display: block;
}

.notifications-header {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--outline);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.notifications-list {
  max-height: 400px;
  overflow-y: auto;
}

.user-menu a {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-primary);
  text-decoration: none;
  transition: background-color var(--transition-fast);
}

.user-menu a:hover {
  background-color: var(--surface-variant);
}

.user-menu hr {
  border: none;
  height: 1px;
  background: var(--outline);
  margin: var(--spacing-xs) 0;
}

/* Content area */
.content {
  flex: 1;
  padding: var(--spacing-xl);
  overflow-x: hidden;
}

/* Cards */
.card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  margin-bottom: var(--spacing-lg);
  transition: box-shadow var(--transition-fast);
}

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

.card-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--outline);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0;
}

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

/* Grid system */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

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

.form-label {
  display: block;
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--outline);
  border-radius: var(--radius-md);
  background: var(--surface);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(25, 118, 210, 0.1);
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  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 var(--transition-normal);
}

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

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

.btn-primary:hover {
  background: var(--primary-dark);
}

.btn-secondary {
  background: var(--secondary-color);
  color: white;
}

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

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

.btn-error {
  background: var(--error-color);
  color: white;
}

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

.btn-outline:hover {
  background: var(--surface-variant);
}

.btn-sm {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 0.875rem;
}

.btn-lg {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1.125rem;
}

/* Tables */
.table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.table th,
.table td {
  padding: var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--outline);
}

.table th {
  background: var(--surface-variant);
  font-weight: 600;
  color: var(--text-primary);
}

.table tr:hover {
  background: var(--surface-variant);
}

/* Kanban board */
.kanban-board {
  display: flex;
  gap: var(--spacing-lg);
  overflow-x: auto;
  padding-bottom: var(--spacing-md);
}

.kanban-column {
  min-width: 300px;
  background: var(--surface-variant);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
}

.kanban-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
  font-weight: 600;
}

.kanban-card {
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  box-shadow: var(--shadow-sm);
  cursor: move;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

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

/* Status badges */
.status-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
}

.status-todo { background: #E3F2FD; color: #1976D2; }
.status-in-progress { background: #FFF3E0; color: #F57C00; }
.status-review { background: #F3E5F5; color: #7B1FA2; }
.status-completed { background: #E8F5E8; color: #388E3C; }

/* Progress bars */
.progress {
  width: 100%;
  height: 8px;
  background: var(--surface-variant);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: var(--primary-color);
  transition: width var(--transition-normal);
}

/* Charts */
.chart-container {
  position: relative;
  height: 300px;
  margin: var(--spacing-md) 0;
}

/* Modals */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2000;
}

.modal.show {
  display: flex;
}

.modal-content {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--outline);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h2 {
  margin: 0;
}

.close-btn {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-secondary);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast);
}

.close-btn:hover {
  background: var(--surface-variant);
}

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

/* Toast notifications */
.toast-container {
  position: fixed;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  z-index: 3000;
}

.toast {
  background: var(--surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  max-width: 400px;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  animation: slideIn 0.3s ease-out;
}

.toast.success { border-left: 4px solid var(--success-color); }
.toast.error { border-left: 4px solid var(--error-color); }
.toast.warning { border-left: 4px solid var(--warning-color); }
.toast.info { border-left: 4px solid var(--info-color); }

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* Toggle switch */
.toggle {
  position: relative;
  display: inline-block;
  width: 48px;
  height: 24px;
}

.toggle input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--outline);
  transition: var(--transition-fast);
  border-radius: 24px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: var(--transition-fast);
  border-radius: 50%;
}

input:checked + .slider {
  background-color: var(--primary-color);
}

input:checked + .slider:before {
  transform: translateX(24px);
}

/* Responsive */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    width: 280px;
  }
  
  .sidebar.show {
    transform: translateX(0);
  }
  
  .main-content {
    margin-left: 0;
  }
  
  .sidebar-toggle,
  .menu-btn {
    display: block;
  }
  
  .grid-4,
  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }
  
  .kanban-board {
    flex-direction: column;
  }
  
  .kanban-column {
    min-width: auto;
  }
  
  .content {
    padding: var(--spacing-md);
  }
}

/* Authentication pages */
.auth-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  padding: var(--spacing-lg);
}

.auth-card {
  background: var(--surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-xxl);
  width: 100%;
  max-width: 400px;
}

.auth-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.auth-header h1 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
}

.auth-link {
  text-align: center;
  margin-top: var(--spacing-lg);
}

.auth-link a {
  color: var(--primary-color);
  text-decoration: none;
}

.auth-link a:hover {
  text-decoration: underline;
}

/* Stats cards */
.stat-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast);
}

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

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

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.stat-change {
  font-size: 0.75rem;
  font-weight: 500;
}

.stat-change.positive { color: var(--success-color); }
.stat-change.negative { color: var(--error-color); }

/* File upload */
.file-upload {
  border: 2px dashed var(--outline);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.file-upload:hover {
  border-color: var(--primary-color);
}

.file-upload.dragover {
  border-color: var(--primary-color);
  background: var(--surface-variant);
}

/* Loading states */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid var(--outline);
  border-radius: 50%;
  border-top-color: var(--primary-color);
  animation: spin 1s ease-in-out infinite;
}

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

/* Error states */
.error-message {
  color: var(--error-color);
  font-size: 0.875rem;
  margin-top: var(--spacing-xs);
}

.success-message {
  color: var(--success-color);
  font-size: 0.875rem;
  margin-top: var(--spacing-xs);
}

/* Empty states */
.empty-state {
  text-align: center;
  padding: var(--spacing-xxl);
  color: var(--text-secondary);
}

.empty-state .material-icons {
  font-size: 4rem;
  margin-bottom: var(--spacing-lg);
  opacity: 0.5;
}

/* Utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }

.hidden { display: none; }
.flex { display: flex; }
.flex-1 { flex: 1; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--spacing-sm); }
.gap-3 { gap: var(--spacing-md); }

.text-sm { font-size: 0.875rem; }
.text-lg { font-size: 1.125rem; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }