/* ========== Sort & Dedup Tool Page ========== */
.tool-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
}
.tool-header {
  text-align: center;
  margin-bottom: 20px;
}
.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: 10px;
  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;
}
.tool-btn.active {
  box-shadow: 0 0 0 2px #fff, 0 0 0 4px var(--color-primary);
}
.tool-btn-success.active {
  box-shadow: 0 0 0 2px #fff, 0 0 0 4px #10b981;
}
.tool-btn-warning.active {
  box-shadow: 0 0 0 2px #fff, 0 0 0 4px #f59e0b;
}
.tool-btn-purple.active {
  box-shadow: 0 0 0 2px #fff, 0 0 0 4px #8b5cf6;
}

/* ========== Mode select ========== */
.mode-select-group {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}
.mode-select-group label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text);
  white-space: nowrap;
}
.mode-select-group select {
  padding: 6px 10px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 13px;
  background: #fff;
  color: var(--color-text);
  cursor: pointer;
  outline: none;
}
.mode-select-group select:focus {
  border-color: var(--color-primary);
}
.toolbar-divider {
  width: 1px;
  height: 28px;
  background: var(--color-border);
  margin: 0 4px;
}

/* ========== 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);
}

/* ========== Advanced Features ========== */
.advanced-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: #f0f9ff;
  border: 1px solid #bae6fd;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  color: #0369a1;
  margin-bottom: 10px;
  transition: all 0.2s;
  user-select: none;
}
.advanced-toggle:hover {
  background: #e0f2fe;
}
.advanced-toggle .toggle-icon {
  transition: transform 0.2s;
  display: inline-block;
}
.advanced-toggle.open .toggle-icon {
  transform: rotate(90deg);
}
.advanced-panel {
  display: none;
  padding: 12px 16px;
  background: #f8fafc;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  margin-bottom: 10px;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}
.advanced-panel.open {
  display: flex;
}
.adv-group {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
}
.adv-group label {
  font-size: 13px;
  color: var(--color-muted);
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
}
.adv-group input[type="text"], .adv-group input[type="number"] {
  padding: 5px 8px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 13px;
  background: #fff;
  color: var(--color-text);
  width: 100px;
  outline: none;
}
.adv-group input[type="text"]:focus, .adv-group input[type="number"]:focus {
  border-color: var(--color-primary);
}
.adv-group input[type="checkbox"] {
  accent-color: var(--color-primary);
  cursor: pointer;
}
.adv-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);
}

/* Screen-reader only (hidden file input) */
.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;
}

/* Input sizes */
.input-mini { width: 60px; }
.input-medium { width: 160px; }

/* Button row */
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  margin-bottom: 12px;
}
.tool-editor {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}
.editor-panel {
  background: #ffffff;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--color-border);
}
.editor-panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  background: #f8fafc;
  border-bottom: 1px solid var(--color-border);
}
.editor-panel-header .panel-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-heading);
}
.editor-panel-header .panel-actions {
  display: flex;
  gap: 5px;
}
.panel-btn {
  padding: 4px 8px;
  font-size: 11px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  cursor: pointer;
  background: #ffffff;
  color: var(--color-muted);
  transition: all 0.15s;
}
.panel-btn:hover {
  background: #f1f5f9;
  color: var(--color-text);
  border-color: var(--color-primary);
}
.tool-editor textarea {
  width: 100%;
  min-height: 320px;
  padding: 16px;
  border: none;
  background: #ffffff;
  color: var(--color-text);
  font-size: 14px;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  line-height: 1.6;
  resize: vertical;
  box-sizing: border-box;
  outline: none;
  tab-size: 2;
}
.tool-editor textarea::placeholder {
  color: #9ca3af;
}
.tool-editor textarea:focus {
  box-shadow: inset 0 0 0 1px var(--color-primary);
}
.tool-editor textarea.output-area {
  color: #16a34a;
  background: #fafff8;
}

/* ========== Stats Panel ========== */
.stats-panel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 8px;
  margin-bottom: 16px;
  padding: 14px 16px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 10px;
}
.stat-item {
  text-align: center;
  padding: 6px;
}
.stat-item .stat-value {
  font-size: 22px;
  font-weight: 800;
  color: var(--color-primary);
  display: block;
}
.stat-item .stat-label {
  font-size: 12px;
  color: var(--color-muted);
  margin-top: 2px;
}
.stat-item.stat-danger .stat-value { color: #ef4444; }
.stat-item.stat-success .stat-value { color: #10b981; }
.stat-item.stat-warning .stat-value { color: #f59e0b; }

/* ========== Frequency Stats ========== */
.freq-panel {
  margin-bottom: 16px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  overflow: hidden;
}
.freq-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  cursor: pointer;
  user-select: none;
  font-weight: 700;
  font-size: 14px;
  color: var(--color-heading);
}
.freq-header:hover {
  background: var(--color-bg-hover);
}
.freq-header .freq-arrow {
  transition: transform 0.2s;
  color: var(--color-muted);
}
.freq-header.open .freq-arrow {
  transform: rotate(180deg);
}
.freq-body {
  display: none;
  padding: 0 16px 16px;
}
.freq-body.open {
  display: block;
}
.freq-body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.freq-body th {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 2px solid var(--color-border);
  font-weight: 700;
  color: var(--color-muted);
  font-size: 12px;
  text-transform: uppercase;
}
.freq-body td {
  padding: 6px 10px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
  vertical-align: middle;
}
.freq-body tr:hover td {
  background: var(--color-bg-hover);
}
.freq-body .freq-content {
  max-width: 400px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  font-size: 12px;
}
.freq-body .freq-bar-bg {
  background: #e2e8f0;
  border-radius: 4px;
  height: 16px;
  position: relative;
  overflow: hidden;
  min-width: 100px;
}
.freq-body .freq-bar {
  height: 100%;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--color-primary), #818cf8);
  transition: width 0.3s;
}
.freq-body .freq-count {
  font-weight: 700;
  text-align: center;
}
.freq-empty {
  text-align: center;
  padding: 20px;
  color: var(--color-muted);
  font-size: 14px;
}

/* ========== Inline Form (Prefix/Suffix/Filter) ========== */
.inline-form {
  display: none;
  gap: 8px;
  align-items: center;
  padding: 8px 12px;
  background: #fefce8;
  border: 1px solid #fde68a;
  border-radius: 8px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.inline-form.open {
  display: flex;
}
.inline-form label {
  font-size: 12px;
  font-weight: 600;
  color: #92400e;
  white-space: nowrap;
}
.inline-form input[type="text"] {
  padding: 5px 8px;
  border: 1px solid #fde68a;
  border-radius: 4px;
  font-size: 13px;
  background: #fff;
  color: var(--color-text);
  outline: none;
  width: 120px;
}
.inline-form input[type="text"]:focus {
  border-color: #f59e0b;
}
.inline-form select {
  padding: 4px 8px;
  border: 1px solid #fde68a;
  border-radius: 4px;
  font-size: 12px;
  background: #fff;
  color: var(--color-text);
  cursor: pointer;
}
.inline-form .tool-btn-sm {
  font-size: 12px;
  padding: 4px 10px;
}

/* ========== Tool Info ========== */
.tool-info {
  margin-top: 30px;
  padding: 24px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
}
.tool-info h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 12px;
}
.tool-info h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-heading);
  margin: 16px 0 8px;
}
.tool-info p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text);
  margin-bottom: 10px;
}
.tool-info ul {
  padding-left: 20px;
  margin-bottom: 10px;
}
.tool-info li {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text);
  margin-bottom: 4px;
}
.tool-info li strong {
  color: var(--color-primary);
}
.info-tip {
  margin-top: 16px;
  padding: 12px 16px;
  background: #fefce8;
  border: 1px solid #fde68a;
  border-radius: 8px;
  font-size: 14px;
  color: #92400e;
  line-height: 1.6;
}
.info-tip strong {
  color: #92400e;
}

/* ========== Status Bar ========== */
#statusMessage {
  text-align: center;
  font-size: 13px;
  padding: 6px 0;
  min-height: 22px;
  color: var(--color-muted);
}
.status-success { color: #10b981 !important; }
.status-error { color: #ef4444 !important; }

/* ========== Responsive ========== */
@media (max-width: 900px) {
  .tool-editor {
    grid-template-columns: 1fr;
  }
  .tool-editor textarea {
    min-height: 200px;
  }
  .stats-panel {
    grid-template-columns: repeat(3, 1fr);
  }
  .tool-header h1 { font-size: 24px; }
}
@media (max-width: 600px) {
  .tool-container { padding: 12px; }
  .tool-toolbar { padding: 8px 10px; }
  .stats-panel { grid-template-columns: repeat(2, 1fr); }
  .tool-info { padding: 16px; }
  .options-bar { gap: 8px; }
  .mode-select-group select { max-width: 130px; }
  .freq-body .freq-content { max-width: 150px; }
}