:root {
  --bg-primary: #0f172a;
  --bg-surface: #1e293b;
  --bg-surface-alt: #334155;
  --bg-input: #0f172a;
  --border-color: #334155;
  --border-focus: #3b82f6;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-blue: #3b82f6;
  --accent-blue-hover: #2563eb;
  --accent-blue-glow: rgba(59, 130, 246, 0.15);
  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.12);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.12);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.12);
  --info: #06b6d4;
  --info-bg: rgba(6, 182, 212, 0.12);
  --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-alt: #f1f5f9;
  --bg-input: #ffffff;
  --border-color: #e2e8f0;
  --border-focus: #3b82f6;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --accent-blue: #2563eb;
  --accent-blue-hover: #1d4ed8;
  --accent-blue-glow: rgba(37, 99, 235, 0.1);
  --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.03);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.navbar {
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  padding: 0.85rem 1.5rem;
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(8px);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.25rem;
}

.brand-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

.brand-tag {
  font-size: 0.7rem;
  background-color: var(--accent-blue-glow);
  color: var(--accent-blue);
  padding: 0.15rem 0.5rem;
  border-radius: 9999px;
  font-weight: 600;
  margin-left: 0.5rem;
  text-transform: uppercase;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.theme-toggle-btn {
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.45rem 0.75rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 500;
}

.theme-toggle-btn:hover {
  background: var(--border-color);
}

/* Layout */
.app-container {
  max-width: 1400px;
  margin: 1.5rem auto;
  padding: 0 1.25rem;
  flex: 1;
  width: 100%;
}

/* Cards */
.card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--card-shadow);
  margin-bottom: 1.25rem;
}

.card-title {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-primary);
}

/* Grid layout for main interface */
.crawler-grid {
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 1.25rem;
}

@media (max-width: 1024px) {
  .crawler-grid {
    grid-template-columns: 1fr;
  }
}

/* Form inputs */
.form-group {
  margin-bottom: 1rem;
}

.form-label {
  display: block;
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.35rem;
}

.form-textarea {
  width: 100%;
  height: 150px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  resize: vertical;
}

.form-textarea:focus,
.form-select:focus,
.form-input:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 2px var(--accent-blue-glow);
}

.form-select,
.form-input {
  width: 100%;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 0.5rem 0.65rem;
  font-size: 0.85rem;
}

/* Checkbox Pills / Record Types */
.record-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.chip-checkbox {
  display: none;
}

.chip-label {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.6rem;
  background-color: var(--bg-surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--text-secondary);
  user-select: none;
}

.chip-checkbox:checked + .chip-label {
  background-color: var(--accent-blue);
  color: white;
  border-color: var(--accent-blue);
}

/* Toggle Switches */
.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.4rem 0;
}

.toggle-info {
  display: flex;
  flex-direction: column;
}

.toggle-title {
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--text-primary);
}

.toggle-desc {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.switch {
  position: relative;
  display: inline-block;
  width: 38px;
  height: 20px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-surface-alt);
  border: 1px solid var(--border-color);
  transition: 0.2s;
  border-radius: 20px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 14px;
  width: 14px;
  left: 2px;
  bottom: 2px;
  background-color: white;
  transition: 0.2s;
  border-radius: 50%;
}

input:checked + .slider {
  background-color: var(--accent-blue);
  border-color: var(--accent-blue);
}

input:checked + .slider:before {
  transform: translateX(18px);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.55rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.2s ease;
  user-select: none;
}

.btn-primary {
  background-color: var(--accent-blue);
  color: white;
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--accent-blue-hover);
}

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

.btn-danger:hover:not(:disabled) {
  opacity: 0.9;
}

.btn-secondary {
  background-color: var(--bg-surface-alt);
  border-color: var(--border-color);
  color: var(--text-primary);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--border-color);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-sm {
  padding: 0.3rem 0.6rem;
  font-size: 0.775rem;
}

.btn-group {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.8rem;
}

/* KPI Summary Cards */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.metric-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.85rem;
  text-align: center;
}

.metric-label {
  font-size: 0.725rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.metric-val {
  font-size: 1.4rem;
  font-weight: 700;
  margin-top: 0.2rem;
  color: var(--text-primary);
}

.val-resolved { color: var(--success); }
.val-nxdomain { color: var(--danger); }
.val-alerts { color: var(--warning); }

/* Progress Bar */
.progress-container {
  margin-bottom: 1.25rem;
}

.progress-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 0.35rem;
}

.progress-track {
  width: 100%;
  height: 8px;
  background-color: var(--bg-surface-alt);
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #3b82f6, #10b981);
  transition: width 0.2s ease;
}

/* Toolbar */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.search-input {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 0.45rem 0.75rem;
  font-size: 0.85rem;
  min-width: 250px;
}

.filter-pills {
  display: flex;
  gap: 0.35rem;
  overflow-x: auto;
}

.filter-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.75rem;
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 500;
  white-space: nowrap;
}

.filter-btn.active {
  background-color: var(--accent-blue);
  color: white;
  border-color: var(--accent-blue);
}

/* Table */
.table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--bg-surface);
}

.results-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.825rem;
}

.results-table th {
  background-color: var(--bg-surface-alt);
  color: var(--text-secondary);
  font-weight: 600;
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.results-table td {
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid var(--border-color);
  vertical-align: middle;
}

.results-table tr:hover {
  background-color: rgba(255, 255, 255, 0.02);
}

[data-theme="light"] .results-table tr:hover {
  background-color: rgba(0, 0, 0, 0.015);
}

/* Status Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.2rem 0.5rem;
  border-radius: 9999px;
  font-size: 0.7rem;
  font-weight: 600;
  white-space: nowrap;
}

.badge-success { background-color: var(--success-bg); color: var(--success); }
.badge-danger  { background-color: var(--danger-bg);  color: var(--danger); }
.badge-warning { background-color: var(--warning-bg); color: var(--warning); }
.badge-info    { background-color: var(--info-bg);    color: var(--info); }
.badge-muted   { background-color: var(--bg-surface-alt); color: var(--text-muted); }

/* Value Pills */
.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  max-width: 250px;
}

.ip-pill {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  color: var(--text-secondary);
}

/* Modal */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  z-index: 50;
  backdrop-filter: blur(4px);
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.modal-content {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  max-width: 850px;
  width: 100%;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
  animation: modalIn 0.15s ease-out;
}

@keyframes modalIn {
  from { transform: scale(0.96); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.modal-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-input);
}

.modal-tab-btn {
  padding: 0.65rem 1.25rem;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
}

.modal-tab-btn.active {
  color: var(--accent-blue);
  border-bottom-color: var(--accent-blue);
  background-color: var(--bg-surface);
}

.modal-body {
  padding: 1.25rem;
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  padding: 0.75rem 1.25rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
}

/* Trace Timeline */
.trace-timeline {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 0.5rem;
}

.trace-step {
  display: flex;
  gap: 1rem;
  position: relative;
}

.trace-step:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 36px;
  left: 17px;
  bottom: -16px;
  width: 2px;
  background-color: var(--border-color);
}

.step-marker {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-surface-alt);
  border: 2px solid var(--accent-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--accent-blue);
  flex-shrink: 0;
  z-index: 1;
}

.step-content {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  flex: 1;
}

/* Code block inside modal */
.raw-box {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 250px;
  overflow-y: auto;
  color: var(--text-secondary);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 3rem 1.5rem;
  color: var(--text-muted);
}

.empty-icon {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

/* Pulse animation for active scanning */
@keyframes spin {
  to { transform: rotate(360deg); }
}

.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 0.8s linear infinite;
}