.ped-svg-container {
  width: 100%;
  overflow-x: auto;
  background: #fafffe;
  border-radius: 0 0 var(--radius) var(--radius);
  border: 1.5px solid var(--border);
  border-top: none;
}
#analysisSvg, #practiceSvg, #builderSvg, #studentSvg {
  display: block;
  min-height: 380px;
}
.tree-frame {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1.5px solid var(--border);
}
.tree-header {
  background: #f8fdf8;
  padding: 0.5rem 0.9rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
  display: flex;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}
.tree-title { min-width: 180px; }
.tree-controls {
  display: inline-flex;
  gap: 0.35rem;
  align-items: center;
  flex-wrap: wrap;
}
.tree-control-btn {
  border: 1.5px solid var(--border);
  background: #fff;
  color: var(--text);
  border-radius: 6px;
  min-width: 2rem;
  height: 2rem;
  padding: 0 0.55rem;
  font-family: var(--font);
  font-size: 0.8rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
}
.tree-control-btn:hover {
  border-color: var(--primary-light);
  color: var(--primary);
  background: #f0fdf4;
}
.zoom-readout {
  min-width: 3rem;
  text-align: center;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: #4b5563;
}
.exercise-selector {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}
.exercise-selector select { max-width: 380px; }
.clue-list { min-height: 2rem; }
.solution-box {
  background: #f0fdf4;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem;
  margin-top: 0.75rem;
  display: none;
}
.solution-box.visible { display: block; }
.genotype-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  margin-top: 0.75rem;
}
.genotype-table th {
  background: var(--primary);
  color: #fff;
  padding: 0.4rem 0.7rem;
  text-align: left;
  font-weight: 600;
}
.genotype-table td {
  padding: 0.4rem 0.7rem;
  border-bottom: 1px solid #e5e7eb;
}
.genotype-table tr:last-child td { border-bottom: none; }
.genotype-table tr:nth-child(even) td { background: #f9fafb; }
.practice-mc label {
  display: block;
  padding: 0.55rem 0.9rem;
  border-radius: 8px;
  border: 1.5px solid var(--border);
  margin-bottom: 0.4rem;
  cursor: pointer;
  transition: all 0.15s;
  font-size: 0.92rem;
}
.practice-mc label:hover { border-color: var(--primary-light); background: #f0fdf4; }
.practice-mc label.correct { background: #d1fae5; border-color: #34d399; }
.practice-mc label.wrong   { background: #fee2e2; border-color: #f87171; }
.practice-mc label.selected { border-color: var(--primary-light); background: #ecfdf5; }
.score-row {
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}
#feedbackBox {
  display: none;
  margin-top: 0.75rem;
}
.builder-section { position: relative; }
.snap-grid-hint {
  position: absolute;
  bottom: 6px;
  right: 8px;
  font-size: 0.72rem;
  color: #9ca3af;
  pointer-events: none;
}
.legend-pedigree {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 0.5rem 0;
  font-size: 0.82rem;
  align-items: center;
}
.legend-pedigree .leg-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.leg-sq {
  width: 16px; height: 16px;
  border: 2px solid #2c3e50;
  display: inline-block;
}
.leg-circle {
  width: 16px; height: 16px;
  border-radius: 50%;
  border: 2px solid #2c3e50;
  display: inline-block;
}
	    .leg-filled-sq { background: var(--affected); border-color: var(--affected); }
	    .leg-filled-ci { background: var(--affected); border-color: var(--affected); }
	    .leg-carrier-sq,
	    .leg-carrier-ci {
	      background: #fff;
	      border-color: #2c3e50;
	      position: relative;
	    }
	    .leg-carrier-sq::after,
	    .leg-carrier-ci::after {
	      content: '';
	      position: absolute;
	      width: 6px;
	      height: 6px;
	      border-radius: 50%;
	      background: var(--carrier);
	      left: 50%;
	      top: 50%;
	      transform: translate(-50%, -50%);
	    }
	    .analysis-result {
	      display: none;
	      margin-top: 1rem;
	    }
	    .analysis-result.visible { display: block; }
.builder-options {
  border: 1px solid var(--border);
  background: #fff;
  padding: 0.75rem;
  margin-bottom: 0.75rem;
}
.builder-options .form-group { margin-bottom: 0; }
.builder-options .allele-symbol-input { max-width: 90px; }
.builder-options textarea { min-height: 72px; resize: vertical; }
.builder-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  align-items: center;
  margin-top: 0.75rem;
}
.builder-status {
  font-size: 0.82rem;
  color: #64748b;
}
.student-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 0.6rem;
  margin-top: 0.75rem;
  font-size: 0.9rem;
}
.student-meta-item {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.55rem 0.7rem;
  background: #fff;
}
.student-answer-input {
  min-width: 120px;
}
.student-feedback {
  display: none;
  margin-top: 0.75rem;
}
.student-feedback.visible { display: block; }
.check-ok { color: #15803d; font-weight: 700; }
.check-warn { color: #b45309; font-weight: 700; }
.check-error { color: #b91c1c; font-weight: 700; }
/* Fullscreen via JS class (works in all browsers) */
#builderWorkspace.is-fullscreen {
  background: var(--bg);
  overflow: auto;
  padding: 0.75rem;
  border-radius: 0;
  position: fixed;
  inset: 0;
  z-index: 9999;
}
#builderWorkspace.is-fullscreen .card-title { display: none !important; }
#builderWorkspace.is-fullscreen #builderSourceNotice { display: none !important; }
#builderWorkspace.is-fullscreen .builder-options { display: none !important; }
#builderWorkspace.is-fullscreen #builderActions { display: none !important; }
#builderWorkspace.is-fullscreen .ped-svg-container {
  max-height: calc(100vh - 110px);
  overflow: auto;
}
#builderWorkspace.is-fullscreen #builderSvg {
  min-height: calc(100vh - 150px);
}
@media print {
  .tree-controls, .pedigree-toolbar, .builder-options, .tabs, .header, footer, .btn-group {
    display: none !important;
  }
  .tree-frame, .card {
    box-shadow: none !important;
  }
}

/* Dark mode overrides for module-specific colors */
[data-theme="dark"] .ped-svg-container { background: #141e14; }
[data-theme="dark"] .tree-header { background: #162016; color: var(--primary, #4ec97a); }
[data-theme="dark"] .tree-control-btn { background: #1e301e; border-color: #2a4a2a; color: var(--text, #dce8dc); }
[data-theme="dark"] .tree-control-btn:hover { background: #1a361a; border-color: var(--primary-light, #5fdb8b); color: var(--primary, #4ec97a); }
[data-theme="dark"] .zoom-readout { color: #9dba9d; }
[data-theme="dark"] .solution-box { background: #1a2a1a; border-color: #2a4a2a; }
[data-theme="dark"] .genotype-table td { border-bottom-color: #2a4a2a; color: var(--text, #dce8dc); }
[data-theme="dark"] .genotype-table tr:nth-child(even) td { background: #1e2e1e; }
[data-theme="dark"] .practice-mc label { color: var(--text, #dce8dc); }
[data-theme="dark"] .practice-mc label:hover { background: #1a361a; }
[data-theme="dark"] .practice-mc label.correct { background: #0d2e1f; border-color: #34d399; color: #6ee7b7; }
[data-theme="dark"] .practice-mc label.wrong   { background: #2e0d0d; border-color: #f87171; color: #fca5a5; }
[data-theme="dark"] .practice-mc label.selected { background: #1a2e1a; }
[data-theme="dark"] .builder-options { background: #192619; border-color: #2a4a2a; }
[data-theme="dark"] .builder-status { color: #9dba9d; }
[data-theme="dark"] .student-meta-item { background: #192619; border-color: #2a4a2a; }
[data-theme="dark"] .leg-sq,
[data-theme="dark"] .leg-circle { border-color: var(--text, #dce8dc); }
[data-theme="dark"] .leg-carrier-sq,
[data-theme="dark"] .leg-carrier-ci { background: #2a3e2a; border-color: var(--text, #dce8dc); }
[data-theme="dark"] #feedbackBox { color: var(--text, #dce8dc); }
.law-box {
  background: linear-gradient(135deg, #f0fdf4, #e8f5e9);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem;
  margin: 1rem 0;
}
.law-title { font-weight: 700; color: var(--primary); font-size: 1rem; margin-bottom: 0.5rem; }
.law-box p { font-size: 0.9rem; margin: 0.3rem 0 0; }
[data-theme="dark"] .law-box { background: linear-gradient(135deg, #0d2e1a, #0a2216); }