:root {
  --bg-dark: #090d16;
  --card-bg: #0f172a;
  --card-border: #1e293b;
  --text-primary: #f8fafc;
  --text-muted: #94a3b8;
  --accent-blue: #38bdf8;
  --accent-green: #10b981;
  --accent-purple: #a855f7;
  --accent-amber: #f59e0b;
  --accent-red: #f43f5e;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'Fira Code', monospace;
}

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

body {
  background-color: var(--bg-dark);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  min-height: 100vh;
}

/* Container */
.lab-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
.lab-header {
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--card-border);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.back-link {
  color: var(--accent-blue);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: transform 0.2s;
}

.back-link:hover {
  transform: translateX(-3px);
}

.header-brand {
  text-align: center;
}

.header-brand h1 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.badge-live {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.7rem;
  font-weight: 700;
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 0.15rem 0.5rem;
  border-radius: 9999px;
  margin-bottom: 0.2rem;
}

.pulse-dot {
  width: 6px;
  height: 6px;
  background-color: var(--accent-green);
  border-radius: 50%;
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.header-author {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Intro Banner */
.lab-intro {
  margin: 2.5rem 0 1.5rem;
  text-align: center;
}

.lab-intro h2 {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, #fff, #94a3b8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.lab-intro p {
  color: var(--text-muted);
  max-width: 800px;
  margin: 0 auto;
  font-size: 1rem;
}

/* Tabs */
.lab-tabs {
  display: flex;
  gap: 0.75rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--card-border);
}

.lab-tab-btn {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-muted);
  padding: 0.75rem 1.25rem;
  border-radius: 8px;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.2rem;
  transition: all 0.2s;
  white-space: nowrap;
}

.lab-tab-btn .tab-subtitle {
  font-size: 0.75rem;
  font-weight: 400;
  opacity: 0.7;
}

.lab-tab-btn:hover {
  border-color: #334155;
  color: var(--text-primary);
}

.lab-tab-btn.active {
  background: #1e293b;
  border-color: var(--accent-blue);
  color: var(--text-primary);
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.15);
}

/* Panes */
.lab-pane {
  display: none;
  animation: fadeIn 0.3s ease;
}

.lab-pane.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.pane-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.pane-title {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.pane-title i {
  font-size: 2rem;
}

.pane-title h3 {
  font-size: 1.3rem;
  font-weight: 700;
}

.pane-title p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.btn-repo {
  color: var(--text-primary);
  background: #1e293b;
  border: 1px solid #334155;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.2s;
}

.btn-repo:hover {
  background: #334155;
}

/* Presets Bar */
.presets-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.btn-preset {
  background: rgba(30, 41, 59, 0.7);
  border: 1px solid #334155;
  color: var(--accent-blue);
  padding: 0.35rem 0.85rem;
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-preset:hover {
  background: #1e293b;
  border-color: var(--accent-blue);
}

/* Card Panels & Grids */
.grid-2col {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 1.5rem;
}

.grid-3col {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 1.5rem;
}

@media (max-width: 900px) {
  .grid-3col { grid-template-columns: 1fr; }
}

.col-span-2 {
  grid-column: span 1;
}

.card-panel {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
}

.panel-heading {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.panel-heading-between {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.step-badge {
  background: #334155;
  color: #fff;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
}

/* Code Editor / Textarea */
.code-editor {
  width: 100%;
  background: #090d16;
  border: 1px solid #1e293b;
  border-radius: 8px;
  color: #e2e8f0;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  padding: 0.85rem;
  resize: vertical;
  line-height: 1.5;
}

.code-editor:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 10px rgba(56, 189, 248, 0.2);
}

.panel-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 1rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn-action {
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.6rem 1.2rem;
  border-radius: 6px;
  cursor: pointer;
  border: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.2s;
}

.btn-action.primary {
  background: #2563eb;
  color: #fff;
}

.btn-action.primary:hover {
  background: #1d4ed8;
}

.btn-action.secondary {
  background: #334155;
  color: #e2e8f0;
}

.btn-action.secondary:hover {
  background: #475569;
}

.badge-metric {
  font-size: 0.8rem;
  color: var(--text-muted);
  background: #1e293b;
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  font-family: var(--font-mono);
}

/* Security Status Box */
.security-status-box {
  background: #090d16;
  border: 1px solid #1e293b;
  border-radius: 8px;
  padding: 1.25rem;
}

.status-indicator {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95rem;
  font-weight: 700;
  padding: 0.4rem 0.85rem;
  border-radius: 6px;
  margin-bottom: 1rem;
}

.status-indicator.safe {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.status-indicator.blocked {
  background: rgba(244, 63, 94, 0.15);
  color: var(--accent-red);
  border: 1px solid rgba(244, 63, 94, 0.4);
}

.risk-meter-wrap {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  font-size: 0.85rem;
}

.risk-bar {
  flex: 1;
  height: 8px;
  background: #1e293b;
  border-radius: 4px;
  overflow: hidden;
}

.risk-bar-fill {
  height: 100%;
  transition: width 0.3s;
}

.risk-bar-fill.green { background: var(--accent-green); }
.risk-bar-fill.red { background: var(--accent-red); }

.risk-val {
  font-family: var(--font-mono);
  font-weight: 700;
}

.threats-list {
  font-size: 0.82rem;
  border-top: 1px solid #1e293b;
  padding-top: 0.75rem;
  color: var(--text-muted);
}

.threats-list.blocked {
  color: var(--accent-red);
  font-weight: 600;
}

/* Result Code Box */
.result-code-box {
  background: #090d16;
  border: 1px solid #1e293b;
  border-radius: 8px;
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
  min-height: 80px;
}

.result-code-box.green {
  border-color: rgba(16, 185, 129, 0.4);
  background: rgba(16, 185, 129, 0.05);
}

.tag-token {
  background: rgba(56, 189, 248, 0.2);
  color: var(--accent-blue);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  font-weight: 600;
  border: 1px solid rgba(56, 189, 248, 0.4);
}

.mappings-pills {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-top: 0.5rem;
}

.map-pill {
  font-size: 0.78rem;
  background: #1e293b;
  padding: 0.35rem 0.6rem;
  border-radius: 4px;
  font-family: var(--font-mono);
}

.map-pill code {
  color: var(--accent-blue);
}

.label-xs {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: block;
  margin-bottom: 0.35rem;
}

.input-text-sm {
  width: 100%;
  background: #090d16;
  border: 1px solid #1e293b;
  border-radius: 6px;
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  padding: 0.6rem;
}

.input-text-sm:focus {
  outline: none;
  border-color: var(--accent-blue);
}

/* EvidenceChain Events */
.events-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.event-card {
  background: #090d16;
  border: 1px solid #1e293b;
  border-radius: 8px;
  padding: 0.85rem 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  transition: all 0.2s;
}

.event-card.corrupted {
  border-color: var(--accent-red);
  background: rgba(244, 63, 94, 0.08);
}

.event-info {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.event-num {
  font-size: 0.75rem;
  color: var(--accent-blue);
  font-weight: 700;
  font-family: var(--font-mono);
}

.event-payload {
  font-size: 0.9rem;
  font-weight: 600;
}

.event-hash {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.event-card.corrupted .event-hash {
  color: var(--accent-red);
}

.badge-integrity {
  padding: 0.35rem 0.85rem;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.badge-integrity.valid {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
  border: 1px solid rgba(16, 185, 129, 0.4);
}

.badge-integrity.corrupted {
  background: rgba(244, 63, 94, 0.15);
  color: var(--accent-red);
  border: 1px solid rgba(244, 63, 94, 0.5);
}

.merkle-root-bar {
  background: #090d16;
  border: 1px solid #1e293b;
  border-radius: 8px;
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.root-label {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-amber);
}

.root-hash-code {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: #fff;
  word-break: break-all;
}

.merkle-visual-tree {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  align-items: center;
  padding: 1rem 0;
  overflow-x: auto;
}

.tree-level {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
}

.tree-node {
  background: #090d16;
  border: 1px solid var(--accent-blue);
  border-radius: 8px;
  padding: 0.5rem 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-align: center;
  min-width: 140px;
  transition: all 0.3s;
}

.tree-node.corrupted {
  border-color: var(--accent-red);
  color: var(--accent-red);
  background: rgba(244, 63, 94, 0.1);
  box-shadow: 0 0 10px rgba(244, 63, 94, 0.3);
}

.btn-sm {
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.4rem 0.85rem;
  border-radius: 6px;
  cursor: pointer;
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.2s;
}

.btn-sm.primary { background: #2563eb; color: #fff; }
.btn-sm.danger { background: rgba(244, 63, 94, 0.2); color: var(--accent-red); border-color: rgba(244, 63, 94, 0.4); }
.btn-sm.danger:hover { background: var(--accent-red); color: #fff; }
.btn-sm.secondary { background: #334155; color: #e2e8f0; }

/* LoomDoctor Controls & Gauges */
.control-group {
  margin-bottom: 1.25rem;
}

.control-group label {
  font-size: 0.85rem;
  font-weight: 600;
  display: block;
  margin-bottom: 0.4rem;
}

.slider {
  width: 100%;
  accent-color: var(--accent-blue);
}

.radio-toggle {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 0.35rem;
}

.danger-pill { color: var(--accent-red); font-size: 0.8rem; font-weight: 600; }
.safe-pill { color: var(--accent-green); font-size: 0.8rem; font-weight: 600; }

.gauges-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 600px) {
  .gauges-grid { grid-template-columns: 1fr; }
}

.gauge-card {
  background: #090d16;
  border: 1px solid #1e293b;
  border-radius: 8px;
  padding: 1rem;
}

.gauge-title {
  font-size: 0.78rem;
  color: var(--text-muted);
  display: block;
  margin-bottom: 0.5rem;
}

.gauge-meter {
  height: 10px;
  background: #1e293b;
  border-radius: 5px;
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.gauge-meter-fill { height: 100%; transition: width 0.3s; }
.gauge-meter-fill.red { background: var(--accent-red); }
.gauge-meter-fill.yellow { background: var(--accent-amber); }
.gauge-meter-fill.green { background: var(--accent-green); }

.gauge-number { font-family: var(--font-mono); font-size: 0.85rem; font-weight: 700; }

.recommendations-box {
  background: #090d16;
  border: 1px solid #1e293b;
  border-radius: 8px;
  padding: 1rem;
}

.rec-header { font-size: 0.85rem; font-weight: 700; margin-bottom: 0.5rem; }
.rec-list { font-size: 0.82rem; color: #cbd5e1; padding-left: 1.25rem; line-height: 1.6; }

/* Fuse Circuit State Display */
.traffic-buttons-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.btn-traffic {
  padding: 0.6rem;
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
}

.btn-traffic.success { background: rgba(16, 185, 129, 0.2); color: var(--accent-green); border: 1px solid rgba(16, 185, 129, 0.4); }
.btn-traffic.success:hover { background: var(--accent-green); color: #fff; }
.btn-traffic.fail { background: rgba(244, 63, 94, 0.2); color: var(--accent-red); border: 1px solid rgba(244, 63, 94, 0.4); }
.btn-traffic.fail:hover { background: var(--accent-red); color: #fff; }
.btn-traffic.danger { background: #dc2626; color: #fff; grid-column: span 2; }
.btn-traffic.secondary { background: #334155; color: #fff; grid-column: span 2; }

.metrics-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
}

.mini-stat {
  background: #090d16;
  padding: 0.6rem;
  border-radius: 6px;
  text-align: center;
  border: 1px solid #1e293b;
}

.mini-title { font-size: 0.68rem; color: var(--text-muted); display: block; }
.mini-val { font-size: 0.9rem; font-weight: 700; font-family: var(--font-mono); }

.circuit-state-display {
  padding: 1.5rem;
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  transition: all 0.3s;
}

.circuit-state-display.closed {
  background: rgba(16, 185, 129, 0.1);
  border: 2px solid var(--accent-green);
}

.circuit-state-display.open {
  background: rgba(244, 63, 94, 0.15);
  border: 2px solid var(--accent-red);
}

.circuit-state-display.half-open {
  background: rgba(245, 158, 11, 0.15);
  border: 2px solid var(--accent-amber);
}

.state-icon-wrap {
  font-size: 3rem;
}

.circuit-state-display.closed .state-icon-wrap { color: var(--accent-green); }
.circuit-state-display.open .state-icon-wrap { color: var(--accent-red); }
.circuit-state-display.half-open .state-icon-wrap { color: var(--accent-amber); }

.state-subtitle { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-muted); }
.state-info h2 { font-size: 2rem; font-weight: 800; font-family: var(--font-mono); }
.state-info p { font-size: 0.82rem; color: var(--text-muted); margin-top: 0.2rem; }

.circuit-log-box {
  background: #090d16;
  border: 1px solid #1e293b;
  border-radius: 8px;
  padding: 0.85rem;
}

.log-title { font-size: 0.75rem; font-weight: 700; color: var(--text-muted); margin-bottom: 0.5rem; }
.log-entries { font-family: var(--font-mono); font-size: 0.75rem; max-height: 120px; overflow-y: auto; color: #94a3b8; }

/* Forensic Modal */
.modal-backdrop {
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(5px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
}

.modal-backdrop.hidden { display: none; }

.modal-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  width: 90%;
  max-width: 700px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.modal-header {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--card-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-body {
  padding: 1.5rem;
  overflow-y: auto;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.7;
  white-space: pre-wrap;
  background: #090d16;
  color: #cbd5e1;
}

.modal-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--card-border);
  display: flex;
  justify-content: flex-end;
}

.btn-close-modal {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Helpers */
.text-blue { color: var(--accent-blue); }
.text-emerald { color: var(--accent-green); }
.text-purple { color: var(--accent-purple); }
.text-amber { color: var(--accent-amber); }
.text-red { color: var(--accent-red); }
.text-green { color: var(--accent-green); }
.text-yellow { color: var(--accent-amber); }
.text-highlight { color: var(--accent-blue); font-weight: 700; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.w-100 { width: 100%; }

/* Guide Box & Technical Explanations */
.guide-box {
  background: rgba(15, 23, 42, 0.75);
  border: 1px solid #1e293b;
  border-left: 4px solid var(--accent-blue);
  border-radius: 10px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
}

#tab-evidencechain .guide-box { border-left-color: var(--accent-green); }
#tab-loomdoctor .guide-box { border-left-color: var(--accent-purple); }
#tab-fuse .guide-box { border-left-color: var(--accent-amber); }

.guide-title {
  font-size: 1rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  color: #fff;
}

.guide-content p {
  font-size: 0.88rem;
  color: #cbd5e1;
  line-height: 1.6;
  margin-bottom: 1rem;
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}

.guide-item {
  background: rgba(9, 13, 22, 0.6);
  border: 1px solid #1e293b;
  border-radius: 8px;
  padding: 0.85rem;
  font-size: 0.82rem;
  color: #94a3b8;
  line-height: 1.55;
}

.guide-item strong {
  color: #f1f5f9;
  display: block;
  margin-bottom: 0.25rem;
}

.panel-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.85rem;
  line-height: 1.5;
}

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