/* ========== Search & Replace Tool Page ========== */
.tool-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px;
}

.tool-header {
  text-align: center;
  margin-bottom: 24px;
}

.tool-header h1 {
  font-size: 32px;
  font-weight: 800;
  color: var(--color-heading);
  margin-bottom: 8px;
}

.tool-header .tool-desc {
  font-size: 16px;
  color: var(--color-muted);
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.6;
}

/* Toolbar */
.tool-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-bottom: 12px;
  padding: 12px 16px;
  background: var(--color-bg-card);
  border-radius: 12px;
  border: 1px solid var(--color-border);
}

.tool-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 8px 16px;
  border: none;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

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

.tool-btn-primary:hover {
  background: #1d4ed8;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(37,99,235,0.3);
}

.tool-btn-success {
  background: #10b981;
  color: #fff;
}

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

.tool-btn-outline {
  background: #fff;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.tool-btn-outline:hover {
  background: var(--color-bg-hover);
  border-color: var(--color-primary);
}

.tool-btn-danger {
  background: #ef4444;
  color: #fff;
}

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

.tool-btn-warning {
  background: #f59e0b;
  color: #fff;
}

.tool-btn-warning:hover {
  background: #d97706;
}

.tool-btn-purple {
  background: #8b5cf6;
  color: #fff;
}

.tool-btn-purple:hover {
  background: #7c3aed;
}

.tool-btn-sm {
  padding: 5px 10px;
  font-size: 12px;
}

.tool-btn-xs {
  padding: 3px 8px;
  font-size: 11px;
}

/* Options bar */
.options-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  margin-bottom: 10px;
  padding: 10px 16px;
  background: var(--color-bg-card);
  border-radius: 8px;
  border: 1px solid var(--color-border);
}

.option-group {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
}

.option-group label {
  white-space: nowrap;
  font-size: 13px;
  color: var(--color-muted);
  font-weight: 500;
  cursor: pointer;
}

.option-group input[type="checkbox"] {
  accent-color: var(--color-primary);
  cursor: pointer;
  width: 15px;
  height: 15px;
}

.option-group select {
  padding: 4px 8px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 13px;
  background: #fff;
  cursor: pointer;
  color: var(--color-text);
  max-width: 180px;
}

/* Regex template bar */
.regex-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  margin-bottom: 10px;
  padding: 8px 14px;
  background: #f0f9ff;
  border-radius: 8px;
  border: 1px solid #bae6fd;
}

.regex-bar .regex-label {
  font-size: 12px;
  font-weight: 600;
  color: #0369a1;
  white-space: nowrap;
}

.regex-tag {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 3px 10px;
  font-size: 12px;
  background: #fff;
  border: 1px solid #bae6fd;
  border-radius: 4px;
  color: #0369a1;
  cursor: pointer;
  transition: all 0.15s;
}

.regex-tag:hover {
  background: #e0f2fe;
  border-color: #0284c7;
}

/* Search / Replace input row */
.search-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 8px;
  align-items: center;
  margin-bottom: 10px;
}

.search-input-wrap {
  position: relative;
}

.search-input-wrap input,
.replace-input-wrap input {
  width: 100%;
  padding: 10px 14px;
  border: 2px solid var(--color-border);
  border-radius: 8px;
  font-size: 14px;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  box-sizing: border-box;
  transition: border-color 0.2s;
  background: #fff;
  color: var(--color-text);
}

.search-input-wrap input:focus,
.replace-input-wrap input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.search-input-wrap .input-badge {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 11px;
  color: #6b7280;
  background: #f3f4f6;
  padding: 2px 8px;
  border-radius: 4px;
}

.replace-input-wrap input {
  border-color: #a7f3d0;
}

.replace-input-wrap input:focus {
  border-color: #10b981;
}

.search-row .arrow-icon {
  font-size: 20px;
  color: var(--color-muted);
  text-align: center;
}

/* Stats dashboard */
.stats-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  margin-bottom: 10px;
  padding: 8px 16px;
  background: #f8fafc;
  border-radius: 8px;
  border: 1px solid #e2e8f0;
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  color: var(--color-muted);
}

.stat-item .stat-value {
  font-weight: 700;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  font-size: 14px;
  color: var(--color-text);
  min-width: 20px;
  text-align: center;
}

.stat-item .stat-value.match-count {
  color: var(--color-primary);
}

.stat-item .stat-value.replaced-count {
  color: #10b981;
}

/* Editor grid */
.editor-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 12px;
}

.editor-panel {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 14px;
  background: #f8fafc;
  border-bottom: 1px solid var(--color-border);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text);
}

.panel-header .panel-title {
  display: flex;
  align-items: center;
  gap: 6px;
}

.panel-actions {
  display: flex;
  gap: 4px;
}

.panel-textarea {
  position: relative;
}

.panel-textarea textarea {
  width: 100%;
  height: 320px;
  padding: 14px;
  border: none;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  font-size: 13px;
  line-height: 1.6;
  resize: vertical;
  background: #fff;
  color: var(--color-text);
  box-sizing: border-box;
}

.panel-textarea textarea:focus {
  outline: none;
}

.panel-textarea textarea::placeholder {
  color: #9ca3af;
}

/* Highlight overlay - positioned over textarea */
.highlight-overlay {
  display: none;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  padding: 14px;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  font-size: 13px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-wrap: break-word;
  overflow: hidden;
  pointer-events: none;
  color: transparent;
  background: transparent;
  box-sizing: border-box;
}

.highlight-overlay.show {
  display: block;
}

.highlight-overlay mark {
  background: #fef08a;
  border-radius: 2px;
  color: transparent;
}

/* Result textarea */
.result-textarea {
  width: 100%;
  height: 320px;
  padding: 14px;
  border: none;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  font-size: 13px;
  line-height: 1.6;
  resize: vertical;
  background: #fafafa;
  color: var(--color-text);
  box-sizing: border-box;
}

.result-textarea:focus {
  outline: none;
}

/* Replace preview list */
.preview-list-section {
  margin-bottom: 12px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow: hidden;
}

.preview-list-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 14px;
  background: #f8fafc;
  border-bottom: 1px solid var(--color-border);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}

.preview-list-body {
  max-height: 200px;
  overflow-y: auto;
  padding: 8px;
  display: none;
}

.preview-list-body.show {
  display: block;
}

.preview-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  font-size: 12px;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.15s;
  border-bottom: 1px solid #f3f4f6;
}

.preview-item:hover {
  background: #eff6ff;
}

.preview-item .preview-idx {
  flex: 0 0 28px;
  font-weight: 600;
  color: var(--color-primary);
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  font-size: 11px;
}

.preview-item .preview-context {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--color-text);
}

.preview-item .preview-context mark {
  background: #fef08a;
  padding: 0 2px;
  border-radius: 2px;
  color: #1e293b;
}

.preview-item .preview-line {
  flex: 0 0 40px;
  text-align: right;
  font-size: 11px;
  color: var(--color-muted);
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
}

/* Diff view */
.diff-view-section {
  margin-bottom: 12px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow: hidden;
  display: none;
}

.diff-view-section.show {
  display: block;
}

.diff-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
}

.diff-panel {
  padding: 12px;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  font-size: 12px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 300px;
  overflow-y: auto;
}

.diff-panel del {
  background: #fecaca;
  color: #991b1b;
  text-decoration: line-through;
}

.diff-panel ins {
  background: #bbf7d0;
  color: #166534;
  text-decoration: none;
}

.diff-panel-before {
  background: #fef2f2;
  border-right: 1px solid var(--color-border);
}

.diff-panel-after {
  background: #f0fdf4;
}

/* Multi-rule panel */
.multi-rule-section {
  margin-bottom: 12px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow: hidden;
}

.multi-rule-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 14px;
  background: #f8fafc;
  border-bottom: 1px solid var(--color-border);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}

.multi-rule-body {
  padding: 10px;
  display: none;
}

.multi-rule-body.show {
  display: block;
}

.rule-row {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 6px;
  align-items: center;
  margin-bottom: 6px;
  padding: 6px;
  background: #f9fafb;
  border-radius: 6px;
  border: 1px solid #e5e7eb;
}

.rule-row input {
  padding: 5px 10px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 13px;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
}

.rule-row .rule-del-btn {
  padding: 4px 8px;
  background: #fee2e2;
  color: #dc2626;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
}

.rule-row .rule-del-btn:hover {
  background: #fecaca;
}

/* Case transform */
.case-transform-bar {
  display: flex;
  gap: 4px;
  padding: 4px;
  background: #f3f4f6;
  border-radius: 6px;
  margin-bottom: 10px;
}

.case-btn {
  padding: 4px 12px;
  font-size: 12px;
  background: transparent;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  color: #6b7280;
  font-weight: 500;
  transition: all 0.15s;
}

.case-btn:hover {
  color: #374151;
  background: rgba(0,0,0,0.03);
}

.case-btn.active {
  background: #fff;
  color: var(--color-primary);
  box-shadow: 0 1px 3px rgba(0,0,0,0.12);
}

/* Line ops */
.line-ops-bar {
  display: flex;
  gap: 6px;
  align-items: center;
  margin-bottom: 10px;
  padding: 6px 12px;
  background: #faf5ff;
  border-radius: 8px;
  border: 1px solid #e9d5ff;
}

.line-ops-bar .line-ops-label {
  font-size: 12px;
  font-weight: 600;
  color: #7c3aed;
  white-space: nowrap;
}

/* Status box */
.status-box {
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 12px;
  font-size: 14px;
  display: none;
}

.status-box.show { display: block; }
.status-success { background: #f0fdf4; border: 1px solid #bbf7d0; color: #16a34a; }
.status-error { background: #fef2f2; border: 1px solid #fecaca; color: #dc2626; }
.status-info { background: #eff6ff; border: 1px solid #bfdbfe; color: #1d4ed8; }

/* Info section */
.tool-info {
  margin-top: 32px;
  padding: 24px;
  background: var(--color-bg-card);
  border-radius: 12px;
  border: 1px solid var(--color-border);
}

.tool-info h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 16px;
}

.tool-info h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-heading);
  margin: 20px 0 12px;
}

.tool-info p {
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.8;
  margin-bottom: 12px;
}

.tool-info ul {
  margin: 0 0 16px 24px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
}

.tool-info li { margin-bottom: 6px; }
.tool-info code {
  background: #f3f4f6;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  color: #be185d;
}

.tool-info pre {
  background: #1e1e2e;
  color: #cdd6f4;
  padding: 14px 18px;
  border-radius: 8px;
  font-size: 13px;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  line-height: 1.6;
  overflow-x: auto;
  margin: 8px 0 16px;
}

.tool-info .info-tip {
  padding: 12px 16px;
  background: #eff6ff;
  border-radius: 8px;
  color: #1e40af;
  margin-top: 16px;
}

/* Keyboard shortcut hints */
.kbd {
  display: inline-block;
  padding: 2px 6px;
  background: #f3f4f6;
  border: 1px solid #d1d5db;
  border-radius: 3px;
  font-size: 12px;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  color: #374151;
  box-shadow: 0 1px 0 #d1d5db;
}

/* Screen-reader only (hidden file inputs) */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Section hint text */
.section-hint {
  font-size: 11px;
  color: var(--color-muted);
  font-weight: 400;
}

/* Rules container */
.rules-container {
  min-height: 40px;
}

.rules-empty {
  font-size: 13px;
  color: var(--color-muted);
  padding: 12px;
  text-align: center;
}

/* Keyboard hint bar */
.keyboard-hint {
  text-align: center;
  font-size: 12px;
  color: var(--color-muted);
  margin-bottom: 16px;
}

/* Highlight in source - now handled via overlay */

/* Responsive */
@media (max-width: 900px) {
  .editor-grid { grid-template-columns: 1fr; }
  .search-row { grid-template-columns: 1fr; }
  .search-row .arrow-icon { display: none; }
  .diff-grid { grid-template-columns: 1fr; }
  .tool-toolbar { gap: 6px; }
  .tool-btn { padding: 6px 12px; font-size: 12px; }
}

@media (max-width: 600px) {
  .tool-container { padding: 12px; }
  .tool-header h1 { font-size: 24px; }
  .options-bar { flex-direction: column; align-items: flex-start; gap: 8px; }
  .stats-bar { flex-direction: column; align-items: flex-start; gap: 4px; }
}