.admin-main {
  min-height: calc(100vh - 140px);
}

.admin-container {
  display: flex;
  min-height: calc(100vh - 140px);
}

.admin-sidebar {
  width: 260px;
  background: var(--card-bg);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  z-index: 20;
}

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

.sidebar-header {
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--border-color);
  background: linear-gradient(135deg, var(--bg-primary), var(--card-bg));
  box-shadow: var(--shadow-sm);
}

.sidebar-header h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.sidebar-header h2::before {
  content: '⚙️';
  font-size: 1.5rem;
}

.sidebar-nav {
  flex: 1;
  padding: 1rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 2rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition);
  border-left: 4px solid transparent;
  position: relative;
  overflow: hidden;
}

.nav-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.05), transparent);
  transition: var(--transition);
}

.nav-item:hover::before {
  left: 100%;
}

.nav-item:hover {
  background: var(--hover-bg);
  color: var(--text-primary);
  transform: translateX(4px);
}

.nav-item.active {
  background: linear-gradient(90deg, rgba(59, 130, 246, 0.1), var(--card-bg));
  color: var(--primary);
  border-left-color: var(--primary);
  font-weight: 600;
  box-shadow: var(--shadow-sm) inset;
}

.nav-item.active:hover {
  background: linear-gradient(90deg, rgba(59, 130, 246, 0.2), var(--card-bg));
}

.nav-icon {
  font-size: 1.25rem;
  min-width: 24px;
  text-align: center;
}

.badge {
  background: var(--error);
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.5rem;
  border-radius: 9999px;
  margin-left: auto;
  min-width: 24px;
  text-align: center;
  transition: var(--transition);
  animation: pulse 2s infinite;
}

.badge:hover {
  transform: scale(1.1);
  box-shadow: 0 2px 8px rgba(239, 68, 68, 0.3);
}

.nav-icon {
  font-size: 1.25rem;
}

.admin-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--bg-primary);
  position: relative;
  overflow-x: auto;
  overflow-y: hidden;
  min-width: 0;
}

.admin-content::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.05) 0%, transparent 50%),
                    radial-gradient(circle at 80% 20%, rgba(16, 185, 129, 0.05) 0%, transparent 50%),
                    radial-gradient(circle at 40% 80%, rgba(139, 92, 246, 0.05) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

.content-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 2rem;
  background: var(--card-bg);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  position: relative;
  z-index: 10;
  transition: var(--transition);
}

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

.content-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.content-header h1::before {
  content: '';
  width: 4px;
  height: 28px;
  background: var(--primary);
  border-radius: var(--radius-sm);
}

.header-actions {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.content-body {
  flex: 1;
  padding: 2rem;
  overflow-x: auto;
  overflow-y: auto;
  position: relative;
  z-index: 1;
  background: var(--bg-primary);
}

.tab-content {
  display: none;
}

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

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.stat-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  box-shadow: var(--shadow-sm);
}

.stat-icon {
  font-size: 2.5rem;
  opacity: 0.8;
}

.stat-info {
  flex: 1;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

.toolbar {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.search-input {
  flex: 1;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  background: var(--input-bg);
  color: var(--text-primary);
}

.search-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.table-container {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  overflow-y: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
  transition: var(--transition);
  max-width: 100%;
}

.table-container:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.data-table {
  width: 100%;
  min-width: 900px;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.data-table thead {
  background: linear-gradient(135deg, var(--bg-secondary), var(--card-bg));
  box-shadow: var(--shadow-sm);
}

.data-table th {
  padding: 1.25rem 1.5rem;
  text-align: left;
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 10;
  transition: var(--transition);
}

.data-table th:hover {
  background: var(--hover-bg);
}

.data-table td {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
  transition: var(--transition);
  position: relative;
}

.data-table tbody tr {
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.data-table tbody tr::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.05), transparent);
  transition: var(--transition);
}

.data-table tbody tr:hover::before {
  left: 100%;
}

.data-table tbody tr:hover {
  background: var(--hover-bg);
  transform: translateX(4px);
}

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

.data-table tbody tr:nth-child(even) {
  background: rgba(59, 130, 246, 0.02);
}

.data-table tbody tr:nth-child(even):hover {
  background: var(--hover-bg);
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.875rem;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 600;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.status::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: var(--transition);
}

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

.status.active {
  background: rgba(16, 185, 129, 0.1);
  color: #10b981;
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.status.active::after {
  content: '●';
  font-size: 0.625rem;
  color: #10b981;
}

.status.inactive {
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.status.inactive::after {
  content: '●';
  font-size: 0.625rem;
  color: #ef4444;
}

.status.pending {
  background: rgba(245, 158, 11, 0.1);
  color: #f59e0b;
  border: 1px solid rgba(245, 158, 11, 0.2);
}

.status.pending::after {
  content: '●';
  font-size: 0.625rem;
  color: #f59e0b;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-width: 80px;
  height: 36px;
  box-shadow: var(--shadow-sm);
}

.btn-sm::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: var(--transition);
}

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

.btn-sm.primary {
  background: var(--primary);
  color: white;
  border: 1px solid var(--primary);
}

.btn-sm.primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

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

.btn-sm.secondary:hover {
  background: var(--hover-bg);
  border-color: var(--primary);
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.1);
}

.btn-sm.danger {
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.btn-sm.danger:hover {
  background: rgba(239, 68, 68, 0.2);
  border-color: #ef4444;
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(239, 68, 68, 0.3);
}

.btn-sm:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  margin-top: 2rem;
  padding: 1rem;
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

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

.pagination span {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  min-width: 60px;
  text-align: center;
}

.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal.hidden {
  display: none;
}

.modal-content {
  background: #ffffff;
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 600px;
  max-height: 85vh;
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 2rem;
  background: linear-gradient(135deg, var(--bg-primary), var(--card-bg));
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.modal-header h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.modal-header h3::before {
  content: '';
  width: 4px;
  height: 24px;
  background: var(--primary);
  border-radius: var(--radius-sm);
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.modal-close:hover {
  background: var(--hover-bg);
  color: var(--text-primary);
  transform: rotate(90deg);
}

.modal-body {
  padding: 2rem;
  background: #ffffff;
  overflow-y: auto;
  flex: 1;
  max-height: calc(85vh - 80px - 76px);
}

.form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.field-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.field-label::after {
  content: ':';
  color: var(--text-muted);
}

.form-input {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  color: var(--text-primary);
  background: var(--input-bg);
  transition: var(--transition);
  outline: none;
}

.form-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
  transform: translateY(-1px);
}

.form-input.disabled {
  background: #f3f4f6;
  border-color: var(--border-color);
  color: var(--text-muted);
  cursor: not-allowed;
  font-style: italic;
}

.form-input[readonly] {
  background: var(--bg-secondary);
  border-color: var(--border-color);
}

.form-input[type="text"],
.form-input[type="email"],
.form-input[type="password"] {
  height: 44px;
}

.form-input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
  cursor: pointer;
}

.form-input[type="date"] {
  height: 44px;
}

.form-input[type="select"] {
  height: 44px;
}

.form-input textarea {
  resize: vertical;
  min-height: 120px;
  font-family: inherit;
  line-height: 1.5;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 1rem;
  padding: 1.5rem 2rem;
  background: linear-gradient(135deg, var(--card-bg), var(--bg-primary));
  border-top: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm) inset;
}

.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-width: 100px;
  height: 44px;
  box-shadow: var(--shadow-sm);
}

.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: var(--transition);
}

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

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

.btn.primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.btn.primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 6px rgba(59, 130, 246, 0.3);
}

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

.btn.secondary:hover {
  background: var(--hover-bg);
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.1);
}

.btn.secondary:active {
  transform: translateY(0);
  box-shadow: 0 2px 6px rgba(59, 130, 246, 0.1);
}

.btn.success {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: white;
  border: 1px solid #10b981;
}

.btn.success:hover {
  background: linear-gradient(135deg, #059669 0%, #047857 100%);
  border-color: #059669;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.btn.success:active {
  transform: translateY(0);
  box-shadow: 0 2px 6px rgba(16, 185, 129, 0.3);
  border-radius: 8px;
  font-size: 0.95rem;
  line-height: 1.5;
}

#feedback-modal #feedback-content {
  min-height: 100px;
  max-height: 200px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-wrap: break-word;
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  padding: 1rem;
  border-radius: 8px;
  line-height: 1.6;
}

#feedback-modal #feedback-status {
  background: #ffffff;
  cursor: pointer;
}

#feedback-modal #feedback-notes {
  min-height: 80px;
  resize: vertical;
  font-family: inherit;
  line-height: 1.5;
}

/* 响应式设计 */
@media (max-width: 1024px) {
  .admin-container {
    flex-direction: column;
  }

  .admin-sidebar {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }

  .sidebar-nav {
    flex-direction: row;
    overflow-x: auto;
    padding: 0.5rem;
  }

  .nav-item {
    white-space: nowrap;
    border-left: none;
    border-bottom: 3px solid transparent;
  }

  .nav-item.active {
    border-left: none;
    border-bottom-color: var(--primary);
  }

  .stats-grid {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  }
}

@media (max-width: 768px) {
  .content-header {
    flex-direction: column;
    gap: 1rem;
    align-items: flex-start;
  }

  .content-body {
    padding: 1rem;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .data-table {
    font-size: 0.85rem;
  }

  .data-table th,
  .data-table td {
    padding: 0.75rem 1rem;
  }

  .toolbar {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .stat-card {
    padding: 1rem;
  }

  .stat-icon {
    font-size: 2rem;
  }

  .stat-value {
    font-size: 1.5rem;
  }

  .modal-content {
    margin: 1rem;
  }
}