.tool-page-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 32px;
  align-items: start;
}

.tool-page-main {
  min-width: 0;
}

.tool-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

.tool-input-area,
.tool-output-area {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.tool-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.tool-textarea {
  width: 100%;
  min-height: 180px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-input);
  color: var(--text-primary);
  font-size: 14px;
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  line-height: 1.6;
  resize: vertical;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.tool-textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
  background: var(--bg-card);
}

.tool-textarea::placeholder {
  color: var(--text-muted);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
}

.tool-textarea[readonly] {
  background: var(--bg-card);
  cursor: default;
}

.output-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 12px;
  cursor: pointer;
  transition: all var(--transition);
}

.copy-btn:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: var(--primary-light);
}

.copy-btn i {
  font-size: 12px;
}

.tool-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-top: 4px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 24px;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  line-height: 1;
}

.btn i {
  font-size: 13px;
}

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

.btn-primary:hover {
  background: var(--primary-hover);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.35);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 6px rgba(99, 102, 241, 0.25);
}

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

.btn-danger:hover {
  background: var(--danger-hover);
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
  transform: translateY(-1px);
}

.btn-danger:active {
  transform: translateY(0);
}

.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  background: linear-gradient(135deg, #10b981, #059669);
  color: #fff;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s ease;
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

.btn-download:hover {
  background: linear-gradient(135deg, #059669, #047857);
  box-shadow: 0 4px 16px rgba(16, 185, 129, 0.4);
  transform: translateY(-1px);
  color: #fff;
  text-decoration: none;
}

.btn-download:active {
  transform: translateY(0);
  box-shadow: 0 2px 6px rgba(16, 185, 129, 0.25);
}

.btn-download i {
  font-size: 16px;
}

.btn-sm {
  padding: 7px 16px;
  font-size: 13px;
}

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

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

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

.btn-success:hover {
  background: #16a34a;
  box-shadow: 0 4px 12px rgba(34, 197, 94, 0.3);
}

.tool-input-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}

.tool-input-group .tool-label {
  margin-bottom: 2px;
}

.tool-input {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-input);
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.tool-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
  background: var(--bg-card);
}

.tool-select {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-input);
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.tool-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.tool-checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.tool-checkbox-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-primary);
  cursor: pointer;
}

.tool-checkbox-label input[type="checkbox"],
.tool-checkbox-label input[type="radio"] {
  accent-color: var(--primary);
  width: 16px;
  height: 16px;
}

.tool-range-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.tool-range {
  flex: 1;
  accent-color: var(--primary);
  height: 6px;
}

.tool-range-value {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  min-width: 40px;
  text-align: center;
}

.tool-file-drop {
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 20px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  background: var(--bg-input);
}

.tool-file-drop:hover,
.tool-file-drop.dragover {
  border-color: var(--primary);
  background: var(--primary-light);
}

.tool-file-drop i {
  font-size: 32px;
  color: var(--text-muted);
  margin-bottom: 8px;
  display: block;
}

.tool-file-drop p {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0;
}

.tool-file-drop .tool-file-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

.tool-result-area {
  margin-top: 16px;
  padding: 16px;
  background: var(--bg-input);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.tool-result-area .tool-label {
  margin-bottom: 8px;
}

.tool-result-preview {
  width: 100%;
  min-height: 120px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
}

.tool-result-preview img {
  max-width: 100%;
  max-height: 300px;
  object-fit: contain;
}

.tool-single-area {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.tool-single-area .tool-textarea {
  min-height: 220px;
}

.tool-options-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}

.tool-options-bar .tool-label {
  margin-right: 4px;
}

.tool-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
  background: var(--primary-light);
  color: var(--primary);
}

.tool-file-input {
  width: 100%;
  padding: 12px 16px;
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  background: var(--bg-input);
  color: var(--text-primary);
  font-size: 14px;
  cursor: pointer;
  transition: all var(--transition);
}

.tool-file-input:hover {
  border-color: var(--primary);
  background: var(--primary-light);
}

.tool-file-input::file-selector-button {
  padding: 8px 16px;
  border: 1px solid var(--primary);
  border-radius: var(--radius-sm);
  background: var(--primary);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  margin-right: 12px;
  transition: all var(--transition);
}

.tool-file-input::file-selector-button:hover {
  background: var(--primary-hover);
}

.img-preview {
  text-align: center;
}

.tool-divider {
  width: 100%;
  height: 1px;
  background: var(--border);
  margin: 16px 0;
}

.tool-info-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 14px;
  background: var(--bg-input);
  border-radius: var(--radius);
  font-size: 13px;
  color: var(--text-secondary);
}

.tool-info-bar strong {
  color: var(--primary);
  font-weight: 600;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 16px 0;
  font-size: 13px;
  color: var(--text-secondary);
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition);
}

.breadcrumb a:hover {
  color: var(--primary);
}

.breadcrumb-sep {
  font-size: 10px;
  color: var(--text-muted);
}

.breadcrumb-current {
  color: var(--text-primary);
  font-weight: 600;
}

.tool-page-header {
  margin-bottom: 28px;
}

.tool-page-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 12px 0;
  line-height: 1.3;
}

.tool-page-title i {
  color: var(--primary);
  font-size: 24px;
}

.tool-page-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

.tool-page-workspace {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 24px;
  margin-bottom: 32px;
  min-height: 200px;
  box-shadow: var(--shadow-card);
  transition: background var(--transition), border-color var(--transition);
}

.tool-page-sections {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.tool-section {
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
}

.tool-section:last-child {
  border-bottom: none;
}

.tool-section-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px 0;
}

.tool-section-title i {
  color: var(--primary);
  font-size: 18px;
}

.tool-section-content {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.feature-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 12px;
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  background: var(--bg-input);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--text-primary);
  transition: all var(--transition);
}

.feature-list li:hover {
  background: rgba(99, 102, 241, 0.06);
}

.feature-list li i {
  color: var(--primary);
  font-size: 12px;
  flex-shrink: 0;
}

.usage-list {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: step;
}

.usage-list li {
  counter-increment: step;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 0;
  font-size: 14px;
  color: var(--text-primary);
  line-height: 1.6;
  border-bottom: 1px dashed var(--border);
}

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

.usage-list li::before {
  content: counter(step);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  flex-shrink: 0;
}

.example-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.example-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
}

.example-item:hover {
  border-color: rgba(99, 102, 241, 0.3);
}

.example-title {
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  background: var(--bg-input);
  border-bottom: 1px solid var(--border);
}

.example-body {
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.example-block {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.example-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
  flex-shrink: 0;
  line-height: 1.6;
}

.example-code {
  font-size: 13px;
  color: var(--text-primary);
  background: var(--bg-input);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  white-space: pre-wrap;
  word-break: break-all;
  line-height: 1.6;
  flex: 1;
  border: 1px solid var(--border);
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
}

.faq-item:hover {
  border-color: rgba(99, 102, 241, 0.3);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  background: var(--bg-input);
  transition: all var(--transition);
  gap: 12px;
}

.faq-question i {
  font-size: 12px;
  color: var(--text-muted);
  transition: transform var(--transition);
  flex-shrink: 0;
}

.faq-item.open .faq-question i {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-item.open .faq-answer {
  max-height: 300px;
}

.faq-answer p {
  padding: 14px 18px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0;
}

.related-tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px;
}

.related-tool-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 18px 12px;
  background: var(--bg-input);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  text-decoration: none;
  transition: all var(--transition);
  text-align: center;
}

.related-tool-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.related-tool-card i {
  font-size: 24px;
  color: var(--primary);
}

.related-tool-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
}

.related-tool-desc {
  font-size: 12px;
  color: var(--text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.tool-page-sidebar {
  position: sticky;
  top: 80px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.sidebar-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  overflow: hidden;
}

.sidebar-card-title {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 16px;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  background: var(--bg-input);
  border-bottom: 1px solid var(--border);
}

.sidebar-card-title i {
  color: var(--primary);
}

.sidebar-card-list {
  padding: 8px;
  max-height: 320px;
  overflow-y: auto;
}

.sidebar-tool-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition);
}

.sidebar-tool-item:hover {
  background: rgba(99, 102, 241, 0.06);
  color: var(--primary);
}

.sidebar-tool-item.active {
  background: rgba(99, 102, 241, 0.1);
  color: var(--primary);
  font-weight: 600;
}

.sidebar-tool-item i {
  font-size: 12px;
  width: 16px;
  text-align: center;
}

.sidebar-category-grid {
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar-category-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition);
}

.sidebar-category-item:hover {
  background: rgba(99, 102, 241, 0.06);
  color: var(--primary);
}

.sidebar-category-item.active {
  background: rgba(99, 102, 241, 0.1);
  color: var(--primary);
  font-weight: 600;
}

.sidebar-category-item i {
  font-size: 12px;
  width: 16px;
  text-align: center;
}

.sidebar-category-item em {
  font-style: normal;
  font-size: 11px;
  color: var(--text-muted);
  margin-left: auto;
  background: var(--bg-input);
  padding: 1px 6px;
  border-radius: 10px;
}

@media (max-width: 1024px) {
  .tool-page-layout {
    grid-template-columns: 1fr;
  }
  .tool-page-sidebar {
    position: static;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
}

@media (max-width: 768px) {
  .tool-page-title { font-size: 22px; }
  .tool-page-workspace { padding: 16px; }
  .tool-section { padding: 20px 0; }
  .tool-section-title { font-size: 18px; }
  .feature-list { grid-template-columns: 1fr; }
  .related-tools-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
  .tool-page-sidebar { grid-template-columns: 1fr; }
  .tool-row {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .tool-textarea {
    min-height: 140px;
  }
  .btn {
    padding: 9px 18px;
    font-size: 13px;
  }
}

@media (max-width: 480px) {
  .breadcrumb { font-size: 12px; gap: 6px; }
  .tool-page-title { font-size: 20px; gap: 8px; }
  .tool-page-title i { font-size: 20px; }
  .tool-page-desc { font-size: 13px; }
  .tool-page-workspace { padding: 12px; border-radius: var(--radius); }
  .feature-list li { padding: 8px 12px; font-size: 13px; }
  .related-tool-card { padding: 14px 10px; }
  .tool-row { gap: 12px; }
  .tool-textarea { min-height: 120px; padding: 10px 12px; font-size: 13px; }
  .tool-actions { flex-wrap: wrap; }
  .btn { padding: 8px 14px; font-size: 12px; }
  .btn-sm { padding: 6px 12px; }
}