.learning-labs {
  --ll-bg: #111111;
  --ll-surface: #1d1d1d;
  --ll-line: #444444;
  --ll-text: #f3f3f3;
  --ll-muted: #bdbdbd;
  --ll-accent: #ff9a43;
  box-sizing: border-box;
  max-width: 1224px;
  width: 100%;
  margin: 0 auto;
  padding: 24px 28px 56px;
  background: var(--ll-bg);
  color: var(--ll-text);
  font-family: inherit;
  font-size: 16px;
  line-height: 1.6;
  letter-spacing: 0;
}
.learning-labs *, .learning-labs *::before, .learning-labs *::after { box-sizing: border-box; letter-spacing: 0; }
.learning-labs [hidden] { display: none !important; }
.learning-labs :where(h1, h2, h3, p, a, label, button, figcaption, summary, span) { overflow-wrap: anywhere; }
.learning-labs h1 { margin: 12px 0 8px; max-width: 950px; font-size: 34px; line-height: 1.18; color: var(--ll-text); }
.learning-labs h2 { margin: 0 0 12px; font-size: 24px; line-height: 1.3; color: var(--ll-text); }
.learning-labs h3 { margin: 0 0 12px; font-size: 20px; line-height: 1.3; color: var(--ll-text); }
.learning-labs p { margin: 0 0 14px; }
.learning-labs a { color: var(--ll-accent); text-decoration: underline; text-underline-offset: 4px; }
.learning-labs a:hover { color: #ffbd86; }
.learning-labs ul { margin: 14px 0; padding-left: 22px; }
.learning-labs li { margin: 6px 0; }
.learning-labs figure { margin: 0; min-width: 0; }
.learning-labs button, .learning-labs input, .learning-labs select, .learning-labs textarea { font: inherit; }
.learning-labs button, .learning-labs select, .learning-labs textarea, .learning-labs input[type="file"] {
  border: 1px solid var(--ll-line);
  border-radius: 5px;
  background: var(--ll-surface);
  color: var(--ll-text);
  min-height: 44px;
  max-width: 100%;
}
.learning-labs button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 9px 14px; cursor: pointer; white-space: normal; line-height: 1.35; }
.learning-labs button:hover:not(:disabled) { border-color: var(--ll-accent); background: #292929; }
.learning-labs button:disabled { cursor: default; color: #aaaaaa; border-color: #333333; }
.learning-labs button:disabled .ll-icon { opacity: .5; }
.learning-labs :is(button, input, select, textarea, a, summary, [tabindex]):focus-visible { outline: 3px solid var(--ll-accent); outline-offset: 3px; }
.learning-labs input[type="checkbox"], .learning-labs input[type="radio"] {
  -webkit-appearance: auto;
  appearance: auto;
  display: inline-block;
  position: static;
  width: 19px;
  min-width: 19px;
  height: 19px;
  min-height: 19px;
  flex: 0 0 19px;
  padding: 0;
  margin: 0;
  opacity: 1;
  visibility: visible;
  clip: auto;
  clip-path: none;
  accent-color: var(--ll-accent);
  color-scheme: dark;
  cursor: pointer;
}
.learning-labs input[type="checkbox"]:disabled, .learning-labs input[type="radio"]:disabled { opacity: .65; cursor: default; }
.learning-labs select { -webkit-appearance: auto; appearance: auto; color-scheme: dark; width: 100%; padding: 9px 34px 9px 12px; text-overflow: ellipsis; }
.learning-labs select option { color: var(--ll-text); background: var(--ll-surface); }
.learning-labs textarea { display: block; resize: vertical; width: 100%; padding: 10px 12px; }
.learning-labs label { display: block; min-width: 0; }
.learning-labs fieldset { border: 0; margin: 0; padding: 0; min-width: 0; }
.learning-labs legend { padding: 0; font-weight: 600; margin-bottom: 10px; }
.learning-labs .ll-icon { display: inline-block; width: 20px; height: 20px; flex: 0 0 20px; vertical-align: middle; object-fit: contain; filter: brightness(0) invert(1); }
.learning-labs a .ll-icon { margin-left: 3px; }
.learning-labs .ll-intro { padding-bottom: 22px; }
.learning-labs .ll-breadcrumb { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 24px; font-size: 14px; }
.learning-labs .ll-breadcrumb a { min-height: 36px; display: inline-flex; align-items: center; }
.learning-labs .ll-lead { font-size: 18px; color: var(--ll-muted); margin: 0; }
.learning-labs .ll-meta { color: var(--ll-muted); font-size: 13px; margin: 10px 0 14px; }
.learning-labs .ll-top-controls { display: flex; flex-wrap: wrap; align-items: end; gap: 16px 24px; border-top: 1px solid var(--ll-line); padding-top: 18px; }
.learning-labs .ll-study-select { flex: 1 1 320px; max-width: 540px; font-size: 14px; }
.learning-labs .ll-study-select select { display: block; margin-top: 5px; }
.learning-labs .ll-check { display: inline-flex; align-items: center; gap: 9px; min-height: 44px; font-size: 14px; }
.learning-labs .ll-comparison { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.learning-labs .ll-viewer { min-width: 0; width: 100%; }
.learning-labs .ll-photo-heading { font-size: 15px; font-weight: 650; min-height: 48px; display: flex; align-items: center; padding: 4px 0 8px; line-height: 1.35; }
.learning-labs .ll-stage { width: 100%; aspect-ratio: 1; position: relative; overflow: hidden; background: #ffffff; border: 1px solid #626262; touch-action: none; user-select: none; cursor: crosshair; }
.learning-labs .ll-stage svg { width: 100%; height: 100%; display: block; overflow: hidden; }
.learning-labs .ll-stage svg image { pointer-events: none; }
.learning-labs .ll-targets { fill: #ffab3826; stroke: #bb4900; stroke-width: 4; pointer-events: none; }
.learning-labs .ll-targets > * { vector-effect: non-scaling-stroke; }
.learning-labs .ll-marker { fill: #ffffffb3; stroke: #111111; stroke-width: 4; pointer-events: none; }
.learning-labs .ll-photo-controls { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; padding: 10px 0 8px; }
.learning-labs .ll-photo-controls button, .learning-labs .ll-photo-mode button, .learning-labs [data-close-exercise] { padding: 8px; width: 44px; height: 44px; flex: 0 0 44px; }
.learning-labs .ll-photo-controls output { width: 48px; text-align: center; font-variant-numeric: tabular-nums; }
.learning-labs .ll-caption { color: var(--ll-muted); font-size: 13px; line-height: 1.5; margin-bottom: 7px; }
.learning-labs .ll-detail { font-size: 14px; min-height: 23px; margin: 4px 0 8px; }
.learning-labs details { border-top: 1px solid var(--ll-line); }
.learning-labs summary { padding: 12px 0; min-height: 44px; cursor: pointer; font-weight: 600; }
.learning-labs details > p { padding-bottom: 8px; }
.learning-labs .ll-credit { font-size: 12px; color: var(--ll-muted); line-height: 1.55; }
.learning-labs .ll-credit summary { font-size: 13px; font-weight: 400; }
.learning-labs .ll-credit p { max-width: 75ch; }
.learning-labs .ll-local-photo { margin-top: 24px; padding: 20px 0 0; border-top: 1px solid var(--ll-line); }
.learning-labs .ll-local-photo fieldset { display: flex; flex-wrap: wrap; align-items: end; gap: 14px; margin-bottom: 10px; }
.learning-labs .ll-local-photo label { flex: 0 1 460px; font-size: 14px; }
.learning-labs input[type="file"] { display: block; width: 100%; padding: 6px; margin-top: 5px; font-size: 14px; }
.learning-labs input[type="file"]::file-selector-button { background: #383838; color: white; border: 0; border-radius: 3px; padding: 8px; margin-right: 8px; }
.learning-labs .ll-evidence { border-top: 1px solid var(--ll-line); padding: 24px 0 0; margin-top: 14px; }
.learning-labs .ll-reading { max-width: 78ch; }
.learning-labs .ll-status-label { color: #8cd8ca; font-size: 14px; }
.learning-labs .ll-caution { padding: 12px 0 12px 16px; border-left: 3px solid var(--ll-accent); color: #dedede; }
.learning-labs .ll-sources { font-size: 13px; margin: 14px 0; }
.learning-labs .ll-section { border-top: 1px solid var(--ll-line); margin-top: 32px; padding-top: 26px; }
.learning-labs .ll-note-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px 22px; max-width: 900px; }
.learning-labs .ll-note-fields label:first-child, .learning-labs .ll-note-fields label:nth-child(2) { grid-column: 1 / -1; }
.learning-labs .ll-note-fields select, .learning-labs .ll-note-fields textarea { margin-top: 5px; }
.learning-labs .ll-note-fields button { justify-self: start; align-self: end; }
.learning-labs [data-note-status] { margin-top: 12px; }
.learning-labs .ll-study-library > details:first-of-type { margin-top: 18px; }
.learning-labs .ll-study-library .ll-reading { padding: 10px 0 20px; }
.learning-labs .ll-progress { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 24px; padding: 20px 0; border-block: 1px solid var(--ll-line); }
.learning-labs .ll-progress > div { flex: 1 1 310px; }
.learning-labs .ll-progress strong { display: block; font-size: 18px; margin-bottom: 5px; }
.learning-labs .ll-actions, .learning-labs .ll-lesson-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.learning-labs .ll-progress progress { width: 100%; height: 8px; border: 0; border-radius: 0; accent-color: var(--ll-accent); background: #333333; }
.learning-labs progress::-webkit-progress-bar { background: #333333; }
.learning-labs progress::-webkit-progress-value { background: var(--ll-accent); }
.learning-labs .ll-lesson-nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 24px; margin: 20px 0; }
.learning-labs .ll-lesson-nav a { display: block; padding: 10px 0; font-size: 14px; min-height: 44px; }
.learning-labs .ll-lesson { display: grid; grid-template-columns: minmax(150px, 240px) minmax(0, 1fr); gap: 32px; padding: 30px 0; border-top: 1px solid var(--ll-line); scroll-margin-top: 110px; }
.learning-labs .ll-lesson .ll-meta { margin-top: 0; }
.learning-labs .ll-lesson-photo { align-self: start; }
.learning-labs .ll-lesson-photo svg { width: 100%; display: block; aspect-ratio: 1; background: white; }
.learning-labs .ll-lesson-photo figcaption { font-size: 13px; padding-top: 8px; color: var(--ll-muted); }
.learning-labs .ll-summary { color: var(--ll-muted); }
.learning-labs .ll-lesson-actions { padding: 12px 0 16px; }
.learning-labs .ll-lesson-actions span { font-size: 13px; color: #8cd8ca; }
.learning-labs .ll-exercise { padding: 24px 0; border-bottom: 1px solid var(--ll-line); scroll-margin-top: 110px; }
.learning-labs .ll-exercise-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.learning-labs .ll-quiz-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 32px; margin-top: 14px; }
.learning-labs .ll-answer-area { padding-top: 48px; }
.learning-labs .ll-photo-mode { display: flex; gap: 6px; margin-bottom: 16px; }
.learning-labs .ll-answer-mode { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px; }
.learning-labs button[aria-pressed="true"] { border-color: var(--ll-accent); background: #3a2a1f; }
.learning-labs .ll-choice { display: flex; align-items: start; gap: 12px; border-bottom: 1px solid var(--ll-line); padding: 12px 0; min-height: 48px; cursor: pointer; }
.learning-labs .ll-choice input { margin-top: 4px; }
.learning-labs [data-check-answer] { border-color: var(--ll-accent); margin: 16px 0; }
.learning-labs .ll-feedback { margin: 20px 0 12px; min-height: 28px; font-weight: 600; }
.learning-labs .ll-feedback[data-result="correct"] { color: #8cd8ca; }
.learning-labs .ll-feedback[data-result="incorrect"], .learning-labs .ll-photo-error, .learning-labs .ll-init-error { color: #ffb3bb; }
.learning-labs [data-answer-explanation] { margin: 0 0 20px; }
.learning-labs .ll-method { font-size: 14px; color: var(--ll-muted); }
.learning-labs .ll-method > a { display: inline-block; margin: 8px 20px 8px 0; }
.learning-labs .ll-session-status { margin: 16px 0; }
@media (max-width: 700px) {
  .learning-labs { padding: 18px 16px 40px; }
  .learning-labs h1 { font-size: 28px; }
  .learning-labs h2 { font-size: 22px; }
  .learning-labs .ll-comparison { gap: 16px; }
  .learning-labs .ll-photo-controls { gap: 4px; }
  .learning-labs .ll-photo-controls output { width: 38px; }
  .learning-labs .ll-photo-controls button { flex-basis: 40px; width: 40px; }
  .learning-labs .ll-lesson { grid-template-columns: minmax(0, 1fr); gap: 18px; }
  .learning-labs .ll-lesson-photo { width: 160px; max-width: 100%; }
  .learning-labs .ll-lesson-photo .ll-credit { width: 100%; }
  .learning-labs .ll-quiz-grid { grid-template-columns: minmax(0, 1fr); gap: 16px; }
  .learning-labs .ll-quiz-grid .ll-viewer { max-width: 430px; margin-inline: auto; }
  .learning-labs .ll-answer-area { padding-top: 0; }
  .learning-labs .ll-note-fields { grid-template-columns: minmax(0, 1fr); }
  .learning-labs .ll-note-fields label { grid-column: 1; }
}
@media (max-width: 480px) {
  .learning-labs .ll-comparison { grid-template-columns: minmax(0, 1fr); gap: 22px; }
  .learning-labs .ll-photo-heading { min-height: 36px; }
  .learning-labs .ll-photo-controls button { width: 44px; flex-basis: 44px; }
  .learning-labs .ll-lesson-nav { grid-template-columns: minmax(0, 1fr); }
  .learning-labs .ll-top-controls { gap: 6px 16px; }
  .learning-labs .ll-study-select { flex-basis: 100%; }
  .learning-labs .ll-lead { font-size: 16px; }
  .learning-labs .ll-progress .ll-actions { width: 100%; }
  .learning-labs .ll-actions button { flex: 1 1 auto; }
}
@media (prefers-reduced-motion: reduce) {
  .learning-labs *, .learning-labs *::before, .learning-labs *::after { scroll-behavior: auto !important; animation: none !important; transition: none !important; }
}
@media print {
  .learning-labs { background: white; color: black; padding: 0; max-width: none; }
  .learning-labs :is(h1, h2, h3, p, span, a, li, summary, figcaption) { color: black; }
  .learning-labs :is(button, input, select, textarea, .ll-photo-controls, .ll-local-photo, .ll-exercise) { display: none !important; }
  .learning-labs .ll-lesson { break-inside: avoid; }
}