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

:root {
  --primary: #4F46E5;
  --primary-light: #6366F1;
  --primary-dark: #4338CA;
  --primary-bg: rgba(79, 70, 229, 0.06);
  --danger: #DC2626;
  --success: #10B981;
  --warning: #F59E0B;
  --bg: #F1F5F9;
  --bg-card: #FFFFFF;
  --text: #0F172A;
  --text-secondary: #475569;
  --text-muted: #94A3B8;
  --border: #E2E8F0;
  --border-light: #F1F5F9;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04), 0 1px 3px rgba(0,0,0,0.06);
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 4px 16px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08), 0 8px 24px rgba(0,0,0,0.04);
  --radius: 10px;
  --radius-sm: 6px;
  --transition: all 0.18s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.admin-container {
  min-height: 100vh;
}

/* Header */
.admin-header {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.logo a {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
}

.logo-icon {
  font-size: 22px;
}

.logo-text {
  font-size: 18px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.3px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  padding: 7px 14px;
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 13px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

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

.user-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-muted);
  margin-left: 8px;
  padding-left: 16px;
  border-left: 1px solid var(--border);
}

/* Main */
.admin-main {
  padding: 28px 28px 48px;
  max-width: 1440px;
  margin: 0 auto;
}

/* Stats Panel */
.stats-panel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 20px 24px;
  box-shadow: var(--shadow-sm);
  text-align: center;
  border: 1px solid var(--border-light);
  transition: var(--transition);
}

.stat-card:hover {
  box-shadow: var(--shadow);
  border-color: var(--border);
  transform: translateY(-1px);
}

.stat-value {
  font-size: 32px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 4px;
  letter-spacing: -0.5px;
  line-height: 1.2;
}

.stat-label {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

/* Tabs */
.tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
}

.tab {
  padding: 11px 20px;
  border: none;
  background: none;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: var(--transition);
}

.tab:hover {
  color: var(--text-secondary);
}

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

.section {
  display: none;
}

.section.active {
  display: block;
}

/* Toolbar */
.toolbar {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
  align-items: center;
}

.btn {
  padding: 9px 18px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.btn-primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 1px 2px rgba(79, 70, 229, 0.2);
}

.btn-primary:hover {
  background: var(--primary-dark);
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.3);
  transform: translateY(-1px);
}

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

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

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

.btn-danger:hover {
  background: #B91C1C;
}

.btn-sm {
  padding: 5px 12px;
  font-size: 12px;
}

#searchInput {
  padding: 9px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 13px;
  min-width: 180px;
  background: var(--bg-card);
  color: var(--text);
  transition: var(--transition);
}

#searchInput:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.08);
}

select {
  padding: 9px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 13px;
  background: var(--bg-card);
  color: var(--text);
  cursor: pointer;
  transition: var(--transition);
}

select:hover {
  border-color: var(--text-muted);
}

/* Sort hint */
.sort-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin: 0 0 14px;
  padding: 6px 12px;
  background: rgba(245, 158, 11, 0.06);
  border-radius: var(--radius-sm);
  display: inline-block;
}

/* Tools Section */
.tools-section {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  border: 1px solid var(--border-light);
}

/* Tools Table */
.tools-table {
  width: 100%;
  border-collapse: collapse;
}

.tools-table th,
.tools-table td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid var(--border-light);
}

.tools-table th {
  background: #F8FAFC;
  font-weight: 600;
  color: var(--text-muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  padding: 12px 18px;
  border-bottom: 1px solid var(--border);
}

.tools-table tbody tr {
  transition: var(--transition);
}

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

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

.tool-cell {
  display: flex;
  align-items: center;
  gap: 14px;
}

.tool-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(79,70,229,0.08), rgba(99,102,241,0.12));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  border: 1px solid rgba(79,70,229,0.1);
  flex-shrink: 0;
}

.tool-info h4 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 2px;
  color: var(--text);
}

.tool-info p {
  font-size: 12px;
  color: var(--text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 260px;
}

/* 排序数字标签 */
.sort-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  padding: 2px 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--text-secondary);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  transition: var(--transition);
}

.sort-badge:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.2px;
}

.status-badge.enabled {
  background: rgba(16, 185, 129, 0.1);
  color: #047857;
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.status-badge.disabled {
  background: rgba(220, 38, 38, 0.08);
  color: #B91C1C;
  border: 1px solid rgba(220, 38, 38, 0.15);
}

.action-btns {
  display: flex;
  gap: 6px;
}

.action-btns .btn {
  padding: 5px 10px;
  font-size: 12px;
}

/* 视图切换按钮 */
.view-toggle {
  display: flex;
  gap: 2px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 3px;
}

.view-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px 10px;
  border: none;
  background: transparent;
  cursor: pointer;
  border-radius: 5px;
  color: var(--text-muted);
  transition: var(--transition);
}

.view-btn:hover {
  background: var(--bg-card);
  color: var(--text-secondary);
  box-shadow: var(--shadow-sm);
}

.view-btn.active {
  background: var(--bg-card);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

/* 卡片视图 */
.tools-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 14px;
  padding: 18px;
}

.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 16px;
  transition: var(--transition);
  cursor: default;
}

.tool-card:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(79, 70, 229, 0.2);
  transform: translateY(-2px);
}

.tool-card-header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 14px;
}

.tool-card-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(79,70,229,0.08), rgba(99,102,241,0.12));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  border: 1px solid rgba(79,70,229,0.1);
  flex-shrink: 0;
}

.tool-card-info {
  flex: 1;
  min-width: 0;
}

.tool-card-info h4 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 2px;
  color: var(--text);
}

.tool-card-info p {
  font-size: 12px;
  color: var(--text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tool-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--border-light);
  gap: 8px;
  flex-wrap: wrap;
}

.tool-card-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--text-secondary);
  flex-wrap: wrap;
}

.tool-card-actions {
  display: flex;
  gap: 5px;
}

.tool-card-actions .btn {
  padding: 4px 10px;
  font-size: 11px;
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.4);
  backdrop-filter: blur(4px);
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal.active {
  display: flex;
}

.modal-content {
  background: var(--bg-card);
  border-radius: 16px;
  width: 90%;
  max-width: 600px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0,0,0,0.15);
  animation: modalIn 0.2s ease;
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: scale(0.95) translateY(10px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.modal-small {
  max-width: 400px;
}

.modal-header {
  padding: 24px 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
}

.close-btn {
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--text-muted);
  line-height: 1;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.close-btn:hover {
  background: var(--bg);
  color: var(--text);
}

.modal-form {
  padding: 24px;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  transition: var(--transition);
  background: var(--bg-card);
  color: var(--text);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79,70,229,0.08);
}

.form-group small {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  color: var(--text-muted);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border-light);
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  color: white;
  font-weight: 500;
  font-size: 13px;
  z-index: 2000;
  animation: slideIn 0.3s ease;
  box-shadow: var(--shadow-md);
}

.toast.success {
  background: var(--success);
}

.toast.error {
  background: var(--danger);
}

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

/* Responsive */
@media (max-width: 768px) {
  .admin-main {
    padding: 16px;
  }

  .admin-header {
    padding: 0 16px;
  }

  .stats-panel {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .stat-card {
    padding: 16px;
  }

  .stat-value {
    font-size: 24px;
  }

  .toolbar {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  #searchInput {
    width: 100%;
    min-width: 0;
  }

  .tools-table {
    font-size: 12px;
  }

  .tools-table th,
  .tools-table td {
    padding: 10px 12px;
  }

  .tool-icon {
    width: 32px;
    height: 32px;
    font-size: 14px;
  }

  .tool-info h4 {
    font-size: 13px;
  }

  .tool-info p {
    max-width: 140px;
  }

  .user-bar {
    font-size: 12px;
    margin-left: 4px;
    padding-left: 10px;
  }

  .nav-link {
    padding: 6px 10px;
    font-size: 12px;
  }
}