/* Navigation Tabs */
.nav-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 30px;
  border-bottom: 2px solid var(--border-color);
  overflow-x: auto;
}

.nav-tab {
  padding: 12px 24px;
  background: transparent;
  border: none;
  border-bottom: 3px solid transparent;
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-tab:hover {
  color: var(--primary-color);
  background: var(--bg-tertiary);
}

.nav-tab.active {
  color: var(--primary-color);
  border-bottom-color: var(--primary-color);
  background: var(--bg-primary);
}

/* Toolbar */
.toolbar {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
  align-items: center;
}

/* Buttons */
.btn {
  padding: 8px 16px;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  white-space: nowrap;
}

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

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

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

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

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

.btn-success:hover {
  background: #059669;
}

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

.btn-danger:hover {
  background: #dc2626;
}

.btn-sm {
  padding: 4px 8px;
  font-size: 12px;
}

/* Status Messages */
.status-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1000;
  max-width: 400px;
}

.status-message {
  padding: 12px 16px;
  border-radius: var(--radius);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
  animation: slideIn 0.3s ease-out;
  box-shadow: var(--shadow-lg);
}

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

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

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

/* Content Sections */
.content-section {
  display: none;
  animation: fadeIn 0.3s ease-out;
}

.content-section.active {
  display: block;
}

/* Cards */
.card {
  background: var(--bg-primary);
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  padding: 24px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

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

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
  position: relative;
}

.card-header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--border-color) 0%, transparent 100%);
}

.card-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 12px;
}

.card-title .icon-wrapper {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 16px;
}

/* 优先级卡片样式 */
.card-primary {
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  border: 2px solid var(--border-color);
  position: relative;
  overflow: hidden;
}

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

.card-secondary {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  position: relative;
}

.card-secondary::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--secondary-color);
  opacity: 0.6;
}

/* Forms */
.form-group {
  margin-bottom: 24px;
  position: relative;
}

.form-label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: var(--text-primary);
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.form-label::before {
  content: '';
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--primary-color);
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--border-color);
  border-radius: 10px;
  font-size: 14px;
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: all 0.2s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
  transform: translateY(-1px);
}

textarea.form-control {
  resize: vertical;
  min-height: 120px;
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  font-size: 13px;
  min-height: 80px;
  font-family: inherit;
}

/* Lists */
.list-group {
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
}

.list-item {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.list-item:hover {
  background: var(--bg-secondary);
}

.list-item.active {
  background: var(--bg-tertiary);
  border-left: 3px solid var(--primary-color);
}

.list-item-title {
  font-weight: 500;
  color: var(--text-primary);
}

.list-item-subtitle {
  font-size: 12px;
  color: var(--text-secondary);
}

/* Site Cards */
.site-card {
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 12px;
  background: var(--bg-secondary);
  transition: var(--transition);
}

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

.site-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.site-card-title {
  font-weight: 600;
  color: var(--text-primary);
  flex: 1;
}

.site-card-actions {
  display: flex;
  gap: 8px;
}

/* Category Management */
.category-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.category-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.category-actions {
  display: flex;
  gap: 8px;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-secondary);
}

.empty-state i {
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.5;
}

/* Loading Spinner */
.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 1s ease-in-out infinite;
}

/* Theme Toggle */
.theme-toggle {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 4px;
  cursor: pointer;
  display: flex;
  gap: 4px;
}

.theme-option {
  padding: 6px 10px;
  border-radius: 16px;
  font-size: 12px;
  transition: var(--transition);
}

.theme-option.active {
  background: var(--primary-color);
  color: white;
}

/* Navigation Items Drag & Drop */
.nav-items-list {
  list-style: none;
  padding: 0;
}

.nav-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-bottom: 8px;
  cursor: move;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 12px;
}

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

.nav-item.dragging {
  opacity: 0.5;
}

.nav-item-handle {
  color: var(--text-secondary);
  cursor: grab;
}

.nav-item-content {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-item-icon {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color);
}

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

.modal.active {
  display: flex;
}

.modal-content {
  background: var(--bg-primary);
  border-radius: var(--radius);
  padding: 24px;
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.modal-title {
  font-size: 18px;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--text-secondary);
}

.modal-footer {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
}