.aip-lab {
  --lab-accent: #1d4ed8;
  --lab-soft: #eff6ff;
  --lab-good: #166534;
  --lab-bad: #9f1239;
  border: 1px solid #bfdbfe;
  border-top: 4px solid var(--lab-accent);
  border-radius: 16px;
  margin: 32px 0;
  padding: 24px;
  background: var(--card);
  color: var(--ink);
  box-shadow: 0 12px 32px rgba(30, 64, 175, .09), 0 2px 6px rgba(15, 23, 42, .06);
  scroll-margin-top: calc(var(--header-h, 64px) + 16px);
}
[data-theme="dark"] .aip-lab {
  --lab-accent: #93c5fd;
  --lab-soft: #172554;
  --lab-good: #86efac;
  --lab-bad: #fda4af;
  border-color: #334d75;
  border-top-color: var(--lab-accent);
  box-shadow: 0 12px 32px rgba(0, 0, 0, .32), 0 0 0 1px rgba(147, 197, 253, .04);
}
.aip-lab__header { margin: -24px -24px 22px; padding: 22px 24px 20px; background: linear-gradient(115deg, var(--lab-soft), var(--card)); border-radius: 12px 12px 0 0; border-bottom: 1px solid var(--line); }
.aip-lab__badge { display: inline-block; font: 700 11px/1.4 var(--mono); letter-spacing: .08em; color: var(--lab-accent); padding: 5px 8px; border: 1px solid var(--lab-accent); border-radius: 5px; }
.aip-lab__title { display: block; margin: 12px 0 7px; font-size: clamp(20px, 3vw, 25px); line-height: 1.3; }
.aip-lab__header p { margin: 0 !important; font-size: 14px; color: var(--muted); }
.aip-lab [hidden] { display: none !important; }
.aip-lab button, .aip-lab select {
  font: inherit;
  font-size: 14px;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 10px 12px;
  cursor: pointer;
  min-height: 44px;
}
.aip-lab button:hover:not(:disabled) { border-color: var(--lab-accent); }
.aip-lab :is(button, select, a):focus-visible { outline: 3px solid var(--lab-accent); outline-offset: 3px; }
.aip-lab button:disabled { opacity: .45; cursor: default; }
.aip-lab p { margin: 8px 0 16px; }
.aip-lab__toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-bottom: 22px; }
.aip-lab__toolbar label { font-size: 14px; font-weight: 700; }
.aip-lab__toolbar select { flex: 1; min-width: 0; max-width: 100%; }
.aip-lab__eyebrow { font: 12px/1.4 var(--mono); color: var(--muted); }
.aip-lab__scenario { border-top: 1px solid var(--line); padding-top: 18px; }
.aip-lab__scenario > p:first-of-type { font-size: 17px; }
.aip-lab__answers { padding: 0; margin: 0; border: 0; min-width: 0; }
.aip-lab__answers legend { font-size: 14px; font-weight: 700; margin-bottom: 10px; }
#aip-choices { display: grid; gap: 8px; }
#aip-choices button { text-align: left; width: 100%; }
#aip-choices button[aria-pressed="true"] { border-color: var(--lab-accent); background: var(--lab-soft); }
#aip-feedback { min-height: 24px; font-size: 14px; }
.aip-lab #aip-feedback:empty { margin: 0; min-height: 0; }
#aip-feedback[data-result="correct"] { color: var(--lab-good); }
#aip-feedback[data-result="incorrect"] { color: var(--lab-bad); }
#aip-reveal { color: var(--lab-accent); border-color: var(--lab-accent); }
.aip-lab__reason { margin-top: 20px; padding: 16px; border-left: 3px solid var(--lab-accent); background: var(--lab-soft); font-size: 14px; }
.aip-lab__reason p:last-child { margin-bottom: 0; }
.aip-lab__selected-answer { font-weight: 600; }
.aip-lab__reason li p, .aip-domains__explanation li p { margin: 5px 0 12px; }
.aip-lab #aip-alternatives, .aip-lab #aip-rejected-options { list-style: none; padding-left: 0; }
.aip-lab__trace-head { display: flex; flex-wrap: wrap; gap: 4px 14px; margin: 22px 0 12px; font-size: 14px; }
.aip-lab__trace-head span { color: var(--muted); }
.aip-lab .aip-lab__path { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 10px; }
.aip-lab__path li { margin: 0; padding: 0; min-width: 0; }
.aip-lab__path button { height: 100%; width: 100%; text-align: left; line-height: 1.45; }
.aip-lab__path button[aria-current="step"] { background: var(--lab-soft); border: 2px solid var(--lab-accent); padding: 9px 11px; }
.aip-lab__path span { display: block; color: var(--muted); font: 12px/1.5 var(--mono); margin-bottom: 5px; }
.aip-lab__detail { padding: 18px; margin-top: 14px; border: 1px solid var(--line); border-radius: 8px; }
.aip-lab__detail > strong { color: var(--lab-accent); }
.aip-lab__detail dl { display: grid; grid-template-columns: 135px 1fr; gap: 12px; font-size: 14px; margin: 16px 0 0; }
.aip-lab__detail dt { font-weight: 700; }
.aip-lab__detail dd { margin: 0; }
.aip-lab__navigation, .aip-lab__case-nav { display: flex; gap: 10px; flex-wrap: wrap; justify-content: space-between; align-items: center; margin-top: 14px; }
.aip-lab__navigation span { font: 12px var(--mono); color: var(--muted); }
.aip-lab__counterfactual { margin-top: 22px !important; font-size: 14px; }
.aip-lab__note { font-size: 12px; color: var(--muted); margin-top: 18px !important; }
.aip-lab__case-nav { border-top: 1px solid var(--line); padding-top: 16px; margin-top: 20px; }
@media (max-width: 600px) {
  .content:has(.aip-lab) { overflow-wrap: anywhere; }
  .content:has(.aip-lab) table { display: block; max-width: 100%; overflow-x: auto; }
  .aip-lab { padding: 15px; scroll-margin-top: 176px; }
  .aip-lab__header { margin: -15px -15px 18px; padding: 20px 15px; }
  .aip-lab__toolbar label { width: 100%; }
  .aip-lab__detail dl { grid-template-columns: 1fr; gap: 5px; }
  .aip-lab__detail dd { margin-bottom: 10px; }
  .aip-lab__case-nav button { flex: 1 1 45%; }
}
.aip-domains__selector { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 8px; margin-bottom: 20px; }
.aip-domains__selector button { text-align: left; line-height: 1.35; }
.aip-domains__selector button strong, .aip-domains__selector button span { display: block; }
.aip-domains__selector button span { font-size: 12px; margin-top: 5px; }
.aip-domains__selector button[aria-pressed="true"], .aip-domains__modes button[aria-pressed="true"] { border-color: var(--lab-accent); background: var(--lab-soft); color: var(--lab-accent); }
.aip-domains__heading { margin-bottom: 18px; }
.aip-domains__heading strong, .aip-domains__heading span { display: block; }
.aip-domains__heading span { font-size: 13px; margin-top: 5px; color: var(--muted); }
.aip-domains__services { font-size: 13px; margin: 18px 0; }
.aip-domains__services ul { display: flex; flex-wrap: wrap; gap: 7px; list-style: none; padding: 0; margin: 8px 0 0; }
.aip-domains__services li { font-size: 12px; margin: 0; padding: 5px 8px; border-radius: 5px; background: var(--lab-soft); color: var(--lab-accent); }
.aip-domains__modes { display: flex; gap: 8px; flex-wrap: wrap; padding-bottom: 16px; border-bottom: 1px solid var(--line); }
.aip-domains__modes button { flex: 1; }
.aip-domains__rule { font-size: 15px; padding: 14px 0; }
.aip-domains__comparisons { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); margin-bottom: 18px; }
.aip-domains__comparison { padding: 15px; border: 1px solid var(--line); border-radius: 8px; font-size: 13px; }
.aip-domains__comparison > strong { color: var(--lab-accent); display: block; margin-bottom: 12px; font-size: 14px; }
.aip-domains__comparison p { margin: 6px 0 12px; }
.aip-domains__comparison p:last-child { margin-bottom: 0; }
.aip-domains__comparison b { display: block; font-size: 12px; }
.aip-domains__prompt { font-size: 17px; padding: 16px 0 4px; }
#aip-trap-choices { display: grid; gap: 8px; }
#aip-trap-choices button { text-align: left; }
#aip-trap-choices button[aria-pressed="true"] { border-color: var(--lab-accent); background: var(--lab-soft); }
#aip-trap-feedback { font-size: 14px; min-height: 24px; }
.aip-lab #aip-trap-feedback:empty { margin: 0; min-height: 0; }
#aip-trap-feedback[data-result="correct"] { color: var(--lab-good); }
#aip-trap-feedback[data-result="incorrect"] { color: var(--lab-bad); }
.aip-domains__explanation { margin-top: 20px; padding: 18px; border-left: 3px solid var(--lab-accent); background: var(--lab-soft); font-size: 14px; }
.aip-domains__explanation ul { padding-left: 20px; }
.aip-domains__explanation li { margin: 8px 0; }
.aip-lab .aip-domains__flow { list-style: none; padding: 20px; margin: 14px 0; border: 1px solid var(--line); border-radius: 12px; background: var(--bg); }
.aip-domains__flow > li { position: relative; margin: 0; }
.aip-domains__flow > li:not(:last-child) { padding-bottom: 30px; }
.aip-domains__flow > li:not(:last-child)::after { content: '↓'; position: absolute; left: 9px; bottom: 3px; color: var(--lab-accent); font-size: 22px; line-height: 24px; }
.aip-domains__node { display: flex; align-items: center; gap: 12px; min-width: 0; }
.aip-domains__node-marker { display: flex; align-items: center; justify-content: center; flex: 0 0 34px; height: 34px; border-radius: 50%; background: var(--lab-soft); color: var(--lab-accent); border: 1px solid var(--lab-accent); font: 700 12px var(--mono); }
.aip-domains__node-card { flex: 1; min-width: 0; padding: 14px 16px; border: 1px solid var(--line); border-left: 3px solid var(--lab-accent); border-radius: 8px; background: var(--card); box-shadow: 0 3px 9px rgba(15, 23, 42, .06); }
.aip-domains__node-card strong { display: block; font-size: 14px; color: var(--lab-accent); }
.aip-domains__node-card p { font-size: 13px; margin: 5px 0 0; }
.aip-domains__branch-label { display: block; font: 12px var(--mono); color: var(--muted); margin: 0 0 10px 46px; }
.aip-lab .aip-domains__branches { list-style: none; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; padding: 14px; margin: 0; border: 1px dashed var(--lab-accent); border-radius: 8px; }
.aip-domains__branches li { margin: 0; align-items: stretch; }
@media (max-width: 600px) {
  .aip-lab .aip-domains__flow { padding: 12px; }
  .aip-domains__node-card { padding: 12px; }
  .aip-lab .aip-domains__branches { grid-template-columns: 1fr; padding: 10px; }
}
@media (max-width: 700px) {
  .aip-domains__selector { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .aip-domains__selector button:last-child { grid-column: 1 / -1; }
}
@media print {
  .aip-lab__interactive { display: none !important; }
  .aip-lab__fallback { display: block !important; }
}