/* ═══════════════════════════════════════════════
   LAB WORKSPACE — Scoped for #lab-workspace
   Replace or augment existing lab.css in each build.
   Layout is isolated under #lab-workspace so it
   cannot leak into the rest of the game shell.
   ════════════════════════════════════════════════ */

#lab-workspace *,
#lab-workspace *::before,
#lab-workspace *::after {
  box-sizing: border-box;
}

#lab-workspace {
  --lw-bg: var(--bg, #080c14);
  --lw-surface: var(--surface, #0f1520);
  --lw-surface2: var(--surface2, #161e2e);
  --lw-surface3: var(--surface3, #1d2740);
  --lw-border: var(--border, rgba(255, 255, 255, 0.08));
  --lw-border2: var(--border2, rgba(255, 255, 255, 0.14));
  --lw-text: var(--text, #eef2f8);
  --lw-text-muted: var(--text-muted, #7c8fa8);
  --lw-text-dim: var(--text-dim, #4a5568);
  --lw-gold: var(--gold, #f5c842);
  --lw-blue: var(--blue, #4fa3e8);
  --lw-green: var(--green, #3dd68c);
  --lw-red: var(--red, #f46060);
  --lw-purple: var(--purple, #a78bfa);
  --lw-radius: var(--radius, 14px);
  --lw-radius-sm: var(--radius-sm, 8px);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: transparent;
  color: var(--lw-text);
  padding: 8px;
  padding-bottom: 16px;
  width: 100%;
}


/* ── List/Grid Toggle ── */
#lab-workspace .lab-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 4px;
}
#lab-workspace .section-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  font-family: var(--font-mono);
  margin: 0 0 2px;
}

/* ── Evidence card base ── */
#lab-workspace .ev-card {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--surface2);
  border: 1.5px solid var(--border2);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, transform 0.1s, opacity 0.15s;
  position: relative;
  user-select: none;
}

#lab-workspace .ev-card:hover {
  border-color: var(--blue);
  background: var(--surface3);
}

#lab-workspace .ev-card:active {
  transform: scale(0.97);
}

#lab-workspace .ev-card.selected {
  border-color: var(--blue);
  background: rgba(79, 163, 232, 0.15);
}

#lab-workspace .ev-card.correct-flash {
  border-color: var(--green);
  background: rgba(61, 214, 140, 0.2);
  animation: lw-flash-green 0.6s ease;
}

#lab-workspace .ev-card.wrong-flash {
  border-color: var(--red);
  background: rgba(244, 96, 96, 0.2);
  animation: lw-flash-red 0.6s ease;
}

#lab-workspace .folder-content.correct {
  border: 1px solid var(--green);
  background: rgba(61, 214, 140, 0.08);
}

#lab-workspace .folder-content.wrong {
  border: 1px solid var(--red);
  background: rgba(244, 96, 96, 0.08);
}

#lab-workspace .ev-card.dragging {
  opacity: 0.4;
  transform: scale(0.95);
}

@keyframes lw-flash-green {
  0%, 100% { border-color: var(--green); background: rgba(61, 214, 140, 0.2); }
  50% { border-color: var(--green); background: rgba(61, 214, 140, 0.4); }
}

@keyframes lw-flash-red {
  0%, 100% { border-color: var(--red); background: rgba(244, 96, 96, 0.2); }
  50% { border-color: var(--red); background: rgba(244, 96, 96, 0.4); }
}

/* ── Info button on cards ── */
#lab-workspace .ev-info-btn {
  appearance: none;
  background: var(--surface3);
  color: var(--text-muted);
  border: 1px solid var(--border2);
  border-radius: 999px;
  width: 22px;
  height: 22px;
  display: inline-grid;
  place-items: center;
  font-size: 0.65rem;
  font-weight: 800;
  cursor: pointer;
  margin-left: auto;
  flex-shrink: 0;
  transition: border-color 0.15s, color 0.15s;
}

#lab-workspace .ev-info-btn:hover {
  border-color: var(--gold);
  color: var(--gold);
}

/* ── Comparator slots ── */
#lab-workspace .comparator-slot {
  border: 2px dashed var(--border2);
  border-radius: var(--radius);
  padding: 8px;
  min-height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.2s, background 0.2s;
  position: relative;
}

#lab-workspace .comparator-slot::before {
  content: attr(data-empty-label);
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.68rem;
  color: var(--text-muted);
  opacity: 0.7;
  pointer-events: none;
}

#lab-workspace .comparator-slot.filled::before {
  display: none;
}

#lab-workspace .comparator-slot.filled {
  border-style: solid;
  border-color: var(--gold);
  background: rgba(245, 200, 66, 0.08);
  min-height: 52px;
}

#lab-workspace .comparator-slot.drop-hover {
  border-color: var(--gold) !important;
  border-style: dotted !important;
  background: rgba(245, 200, 66, 0.12) !important;
}

#lab-workspace .comparator-slot.correct {
  border-color: var(--green);
  background: rgba(61, 214, 140, 0.1);
}

#lab-workspace .comparator-slot.wrong {
  border-color: var(--red);
  background: rgba(244, 96, 96, 0.1);
}

/* ── Folder trays (accordion) ── */
#lab-workspace .folder-tray {
  border: 1.5px solid var(--border2);
  border-radius: var(--radius);
  margin-bottom: 6px;
  transition: border-color 0.2s, background 0.2s;
  overflow: hidden;
}

#lab-workspace .folder-tray-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 10px;
  cursor: pointer;
  user-select: none;
  background: var(--surface2);
}

#lab-workspace .folder-tray-header:hover {
  background: var(--surface3);
}

#lab-workspace .folder-tray-header .folder-header-title {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text);
}

#lab-workspace .folder-tray-header .folder-chevron {
  font-size: 0.65rem;
  color: var(--text-muted);
  transition: transform 0.2s;
}

#lab-workspace .folder-tray.expanded .folder-tray-header .folder-chevron {
  transform: rotate(180deg);
}

#lab-workspace .folder-tray-body {
  display: none;
  padding: 0 10px 10px;
}

#lab-workspace .folder-tray.expanded .folder-tray-body {
  display: block;
}

#lab-workspace .folder-tray.drop-hover {
  border-color: var(--gold) !important;
  border-style: dotted !important;
  background: rgba(245, 200, 66, 0.12) !important;
}

#lab-workspace .folder-tray.drop-hover .folder-tray-header {
  background: rgba(245, 200, 66, 0.12);
}

/* ── Timeline steps (accordion) ── */
#lab-workspace .timeline-step {
  border: 1.5px solid var(--border2);
  border-radius: var(--radius);
  margin-bottom: 6px;
  transition: border-color 0.2s, background 0.2s;
  overflow: hidden;
}

#lab-workspace .step-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  padding: 10px;
  cursor: pointer;
  user-select: none;
  background: var(--surface2);
}

#lab-workspace .step-header:hover {
  background: var(--surface3);
}

#lab-workspace .step-title {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text);
}

#lab-workspace .step-hint {
    display:none;
  font-size: 0.65rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

#lab-workspace .step-chevron {
  font-size: 0.65rem;
  color: var(--text-muted);
  transition: transform 0.2s;
}

#lab-workspace .timeline-step.expanded .step-chevron {
  transform: rotate(180deg);
}

#lab-workspace .step-body {
  display: none;
  padding: 0 10px 10px;
}

#lab-workspace .timeline-step.expanded .step-body {
  display: block;
}

#lab-workspace .timeline-step.filled {
  border-color: var(--gold);
  border-style: solid;
  background: rgba(245, 200, 66, 0.06);
}

#lab-workspace .timeline-step.drop-hover {
  border-color: var(--gold) !important;
  border-style: dotted !important;
  background: rgba(245, 200, 66, 0.12) !important;
}

#lab-workspace .timeline-step.drop-hover .step-header {
  background: rgba(245, 200, 66, 0.12);
}

#lab-workspace .timeline-step.correct {
  border-color: var(--green);
  background: rgba(61, 214, 140, 0.1);
}

#lab-workspace .timeline-step.wrong {
  border-color: var(--red);
  background: rgba(244, 96, 96, 0.1);
}

#lab-workspace .step-cards-container {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  min-height: 36px;
}

/* ── Desk stations ── */
#lab-workspace .desk-station {
  border: 1.5px solid var(--border2);
  border-radius: var(--radius);
  padding: 12px;
  margin-bottom: 8px;
  transition: border-color 0.2s, background 0.2s;
}

#lab-workspace .desk-station.drop-hover {
  border-color: var(--gold) !important;
  border-style: dotted !important;
  background: rgba(245, 200, 66, 0.12) !important;
}

/* ── Drop zone hover (yellow dotted border) ── */
#lab-workspace .comparator-slot.drop-hover,
#lab-workspace .folder-tray.drop-hover,
#lab-workspace .timeline-step.drop-hover,
#lab-workspace .desk-station.drop-hover {
  border-style: dotted !important;
  border-width: 2px !important;
  border-color: var(--gold) !important;
  background: rgba(245, 200, 66, 0.12) !important;
}

/* ── Feedback ── */
#lab-workspace .lw-feedback {
  font-size: 0.78rem;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text-muted);
}

#lab-workspace .lw-feedback.success {
  border-color: var(--green);
  color: var(--green);
  background: rgba(61, 214, 140, 0.08);
}

#lab-workspace .lw-feedback.error {
  border-color: var(--red);
  color: var(--red);
  background: rgba(244, 96, 96, 0.08);
}

/* ── Modal ── */
#lab-workspace .modal-mask {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  z-index: 1000;
  place-items: center;
}

#lab-workspace .modal-mask.open {
  display: grid;
}

#lab-workspace .modal-card {
  background: var(--surface);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  padding: 20px;
  max-width: 360px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
}

#lab-workspace .modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

#lab-workspace .modal-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
}

#lab-workspace .modal-close {
  appearance: none;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 4px 8px;
}

#lab-workspace .modal-body {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 12px;
}

#lab-workspace .detail-row {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 0.78rem;
  padding: 8px;
  background: var(--surface2);
  border-radius: var(--radius-sm);
}

#lab-workspace .detail-row strong {
  color: var(--gold);
  flex-shrink: 0;
}

/* ── Card pool grid ── */
#lab-workspace .card-pool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 8px;
  margin-bottom: 10px;
}

/* ── Actions bar ── */
#lab-workspace .actions-bar {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin: 8px 0;
  width: 100%;
}

#lab-workspace .btn-secondary {
  background: var(--surface3);
  border: 1px solid var(--border2);
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  color: var(--text-muted);
  font-size: 0.78rem;
  cursor: pointer;
  transition: background 0.15s;
}

#lab-workspace .btn-secondary:hover {
  background: var(--surface2);
}

#lab-workspace .btn-submit {
  background: var(--gold);
  border: none;
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  color: var(--bg);
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
  transition: opacity 0.15s;
}

#lab-workspace .btn-submit:hover {
  opacity: 0.85;
}

/* ── Trash archive ── */
#lab-workspace .trash-archive-box {
  max-height: 120px;
  overflow-y: auto;
  transition: border-color 0.15s ease, background 0.15s ease;
}

#lab-workspace #lw-shredded-bank.drop-hover {
  border-style: solid;
  border-color: var(--lw-red);
  background: rgba(244, 96, 96, 0.18);
}


#lab-workspace #lw-desk-bank {
    justify-content: center;
    position: relative;

}

#lab-workspace #lw-desk-bank,
#lab-workspace #lw-shredded-bank,
#lab-workspace #lw-folder-bank, 
#lab-workspace #lw-timeline-bank  {
  background: var(--lw-surface2);
  border: 2px dashed var(--lw-border2);
  border-radius: var(--lw-radius-sm);
  padding: 8px;
  min-height: 60px;
  transition: border-color 0.15s ease, background 0.15s ease;
}

#lab-workspace #lw-desk-bank {
  background: var(--lw-surface2);
  border: 2px dashed var(--lw-border2);
  border-radius: var(--lw-radius-sm);
  padding: 8px;
  min-height: 60px;
  transition: border-color 0.15s ease, background 0.15s ease;
}

#lab-workspace #lw-desk-bank.drop-hover {
  border-style: solid;
  border-color: var(--lw-gold);
  background: rgba(245, 200, 66, 0.12);
}

#lab-workspace .timeline-badge {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--lw-gold);
  color: #1a1206;
  margin-left: 8px;
  line-height: 1.2;
}

#lab-workspace .folder-verify-badge {
  display: none;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
  margin-left: 8px;
  line-height: 1.2;
}

#lab-workspace .folder-verify-badge.badge-correct {
  background: var(--lw-green);
  color: #0a2e1a;
}

#lab-workspace .folder-verify-badge.badge-wrong {
  background: var(--lw-red);
  color: #fff;
}

/* ── Tab panels ── */
#lab-workspace .tab-panel {
  display: none;
}

#lab-workspace .tab-panel.active {
  display: block;
}

/* ── Lab action buttons ── */
#lab-workspace .lab-btn {
  background: var(--surface3);
  color: var(--text);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  padding: 10px 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  transition: background 0.15s, transform 0.15s, border-color 0.15s;
}

#lab-workspace .lab-btn:hover:not([aria-disabled="true"]) {
  background: var(--lw-surface3);
  color: var(--lw-gold);
}

#lab-workspace .lab-btn:active:not([aria-disabled="true"]) {
  transform: scale(0.95);
}

#lab-workspace .lab-btn.active {
  background: var(--gold);
  color: var(--bg);
  border-color: var(--gold);
}


#lab-workspace .lab-btn.active .lab-btn-label,
#lab-workspace .lab-btn.active .lab-btn-icon {
  color: var(--lw-surface3);
}

#lab-workspace .lab-btn.active:hover .lab-btn-label, 
#lab-workspace .lab-btn.active:hover .lab-btn-icon  {
  color: var(--gold-text);
}


#lab-workspace .lab-btn[aria-disabled="true"] {
  opacity: 0.4;
  cursor: not-allowed;
}

#lab-workspace .lab-btn-icon {
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

#lab-workspace .lab-btn-label {
  font-size: 0.68rem;
  font-weight: 700;
}

/* ── Comparator stage ── */
#lab-workspace .comparator-stage {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 10px;
}

#lab-workspace .comparator-slots {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

/* ── Desk stage (contradict panel) ── */
#lab-workspace .desk-stage {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 10px;
}


/* ── Slot label ── */

#lab-workspace .slot-label {
    font-size: 0.68rem;
    font-weight: 700;
    text-align: center;
    color: #4a5568;
  
}

#lab-workspace .slot-label .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;
}

/* ── Evidence A/B badge in bank ── */
#lab-workspace .ev-card .sel-badge {
  position: absolute;
  top: 3px;
  right: 4px;
  font-size: 0.6rem;
  font-weight: 700;
  color: var(--bg);
  border-radius: 3px;
  padding: 0 3px;
  line-height: 1.4;
  z-index: 1;
}

#lab-workspace .ev-card .sel-badge-a {
  background: var(--blue);
}

#lab-workspace .ev-card .sel-badge-b {
  background: var(--gold);
}

#lab-workspace .actions-bar > :only-child {
  grid-column: 1 / -1;
}

#lab-workspace .card-name {
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--lw-text);
  text-align: center;
}

#lab-workspace .compare-progress {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  color: var(--lw-text);
  margin-top: 8px;
}

#lab-workspace .compare-progress-count {
  font-weight: 700;
  color: var(--lw-gold);
}

#lab-workspace .matched-pairs-panel {
  margin-top: 10px;
  padding: 8px;
  background: rgba(245, 200, 66, 0.06);
  border: 1px dashed rgba(245, 200, 66, 0.25);
  border-radius: var(--lw-radius-sm);
}

#lab-workspace .matched-pairs-header {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--lw-gold);
  margin-bottom: 6px;
}

#lab-workspace .matched-pairs-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

#lab-workspace .matched-pair-row {
  display: flex;
  align-items: center;
  gap: 6px;
}

#lab-workspace .matched-pair-row .ev-card {
  opacity: 0.85;
}

#lab-workspace .pair-arrow {
  color: var(--lw-gold);
  font-weight: 700;
}

#lab-workspace .ev-card.matched {
  opacity: 0.7;
}

#lab-workspace .ev-card[data-folder-status="correct"]::after {
  content: " ✓";
  color: #22c55e;
  font-weight: 700;
}

#lab-workspace .ev-card[data-folder-status="wrong"]::after {
  content: " ✗";
  color: #ef4444;
  font-weight: 700;
}

#lab-workspace .result-celebration {
  border: 2px solid var(--lw-gold);
  background: linear-gradient(135deg, var(--lw-surface2) 0%, rgba(245, 200, 66, 0.08) 100%);
  box-shadow: 0 0 40px rgba(245, 200, 66, 0.25), 0 20px 50px rgba(0, 0, 0, 0.45);
  animation: celebrationPulse 2s ease-in-out infinite;
}

#lab-workspace .celebration-stars {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  border-radius: inherit;
}

#lab-workspace .celebration-stars .star {
  position: absolute;
  color: var(--lw-gold);
  font-size: 0.9rem;
  animation: starTwinkle 1.5s ease-in-out infinite;
}

#lab-workspace .celebration-stars .star-1 { top: 8%; left: 10%; animation-delay: 0s; }
#lab-workspace .celebration-stars .star-2 { top: 12%; right: 12%; animation-delay: 0.2s; }
#lab-workspace .celebration-stars .star-3 { bottom: 15%; left: 8%; animation-delay: 0.4s; }
#lab-workspace .celebration-stars .star-4 { bottom: 10%; right: 10%; animation-delay: 0.6s; }
#lab-workspace .celebration-stars .star-5 { top: 50%; left: 5%; animation-delay: 0.8s; }
#lab-workspace .celebration-stars .star-6 { top: 45%; right: 6%; animation-delay: 1s; }
#lab-workspace .celebration-stars .star-7 { top: 20%; left: 50%; animation-delay: 0.3s; }
#lab-workspace .celebration-stars .star-8 { bottom: 25%; right: 40%; animation-delay: 0.7s; }

#lab-workspace .celebration-title {
  background: linear-gradient(135deg, #f5c842 0%, #fbbf24 50%, #f59e0b 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 1.3rem;
  font-weight: 800;
  text-align: center;
  animation: celebrationShimmer 2s ease-in-out infinite;
}

#lab-workspace .celebration-body {
  font-size: 0.95rem;
  text-align: center;
  color: var(--lw-text);
  line-height: 1.5;
}

#lab-workspace .celebration-detail {
  font-size: 0.85rem;
  text-align: center;
  color: var(--lw-gold);
  font-weight: 600;
  padding: 8px;
  background: rgba(245, 200, 66, 0.1);
  border-radius: var(--lw-radius-sm);
}

@keyframes starTwinkle {
  0%, 100% { opacity: 0.3; transform: scale(0.8); }
  50% { opacity: 1; transform: scale(1.2); }
}

@keyframes celebrationPulse {
  0%, 100% { box-shadow: 0 0 40px rgba(245, 200, 66, 0.25), 0 20px 50px rgba(0, 0, 0, 0.45); }
  50% { box-shadow: 0 0 60px rgba(245, 200, 66, 0.4), 0 20px 50px rgba(0, 0, 0, 0.45); }
}

@keyframes celebrationShimmer {
  0%, 100% { filter: brightness(1); }
  50% { filter: brightness(1.2); }
}

#lab-workspace .game-over-title {
  color: #ef4444;
  font-size: 1.3rem;
  font-weight: 800;
  text-align: center;
  animation: gameOverPulse 2s ease-in-out infinite;
}

#lab-workspace .game-over-body {
  font-size: 0.95rem;
  text-align: center;
  color: var(--lw-text);
  line-height: 1.5;
}

#lab-workspace .game-over-reason {
  font-size: 0.85rem;
  text-align: center;
  color: var(--text-muted);
  font-style: italic;
  padding: 8px;
  background: rgba(239, 68, 68, 0.1);
  border-radius: var(--lw-radius-sm);
}

@keyframes gameOverPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}
#lab-workspace .lab-relationship-select {
  min-height: 42px;
  padding: 0 12px;
  border: 1px solid var(--border, #725c36);
  border-radius: 8px;
  background: var(--panel, #211b14);
  color: var(--text, #f4ead5);
  font: inherit;
}

#lab-workspace .reliability-task { padding: 12px; border: 1px solid var(--border, #725c36); border-radius: 10px; }

#lab-workspace .ev-card:focus-visible, #lab-workspace .comparator-slot:focus-visible, #lab-workspace .timeline-step:focus-visible { outline: 3px solid var(--gold, #e4b95b); outline-offset: 3px; }
#lab-workspace .compare-progress-optional { margin-left: auto; color: var(--text-muted); font-size: 0.78rem; }
@media (max-width: 520px) {
  #lab-workspace .actions-bar { flex-wrap: wrap; }
  #lab-workspace .lab-relationship-select { flex: 1 1 100%; order: -1; width: 100%; }
  #lab-workspace .actions-bar .btn-secondary, #lab-workspace .actions-bar .btn-submit { flex: 1 1 calc(50% - 6px); }
  #lab-workspace .compare-progress { align-items: flex-start; flex-direction: column; }
  #lab-workspace .compare-progress-optional { margin-left: 0; }
}

/* ── Simplified Lab navigation and relationship challenge ── */
#lab-workspace .lab-actions {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  gap: 10px;
  margin: 10px 0 14px;
  width: 100%;
}

#lab-workspace .lab-btn {
  min-height: 54px;
  flex-direction: row;
  justify-content: center;
  gap: 8px;
  padding: 10px 14px;
}

#lab-workspace .connections-actions {
  display: grid;
  grid-template-columns: minmax(88px, 0.55fr) minmax(190px, 1.35fr) minmax(145px, 1fr);
  align-items: stretch;
  gap: 10px;
  margin: 12px 0 14px;
}

#lab-workspace .relationship-field {
  position: relative;
  display: grid;
  gap: 3px;
  min-width: 0;
  padding: 5px 34px 5px 11px;
  border: 1px solid var(--lw-border2);
  border-radius: var(--lw-radius-sm);
  background: linear-gradient(180deg, var(--lw-surface3), var(--lw-surface2));
}

#lab-workspace .relationship-field::after {
  content: "⌄";
  position: absolute;
  right: 12px;
  top: 50%;
  color: var(--lw-gold);
  font-size: 1.15rem;
  line-height: 1;
  transform: translateY(-45%);
  pointer-events: none;
}

#lab-workspace .relationship-field label {
  color: var(--lw-text-muted);
  font-size: 0.6rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  line-height: 1;
  text-transform: uppercase;
}

#lab-workspace .relationship-field .lab-relationship-select {
  appearance: none;
  width: 100%;
  min-height: 26px;
  padding: 0;
  border: 0;
  border-radius: 0;
  outline: 0;
  background: transparent;
  color: var(--lw-text);
  font: inherit;
  font-size: 0.82rem;
  font-weight: 750;
  cursor: pointer;
}

#lab-workspace .relationship-field:focus-within {
  border-color: var(--lw-gold);
  box-shadow: 0 0 0 3px rgba(245, 200, 66, 0.16);
}

@media (max-width: 520px) {
  #lab-workspace .lab-actions { grid-template-columns: 1fr 1fr; }
  #lab-workspace .connections-actions { grid-template-columns: 1fr 1fr; }
  #lab-workspace .connections-actions .relationship-field { grid-column: 1 / -1; grid-row: 1; }
  #lab-workspace .connections-actions .btn-secondary,
  #lab-workspace .connections-actions .btn-submit { min-height: 44px; }
}