/* au.css: lane AU styles, scoped under .au. Uses site.css tokens. */
.au {
  padding: 28px 0 56px;
}
.au .wrap > h1 {
  font-size: clamp(2rem, 6vw, 3.2rem);
  margin-bottom: 12px;
}
.au h2 {
  font-size: clamp(1.4rem, 3.6vw, 1.9rem);
  margin: 40px 0 12px;
}
.au h3 {
  margin: 28px 0 10px;
}
.au h3 small {
  font-weight: 600;
  color: var(--muted);
  font-size: 0.8em;
}
.au .meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 10px 0 22px;
}
.au .meta span {
  background: var(--bg-alt);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 3px 12px;
  font-size: 0.85rem;
  font-weight: 700;
}
.au-small {
  font-size: 0.9rem;
  color: var(--muted);
}
.sr {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* layout */
.au-grid {
  display: grid;
  gap: 28px;
  grid-template-columns: 1fr;
  align-items: start;
}
@media (min-width: 900px) {
  .au-grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  }
  .au-side {
    position: sticky;
    top: 84px;
  }
}
.au-side > * + * {
  margin-top: 16px;
}

/* pictures */
.au-fig {
  margin: 0;
  border-radius: 20px;
  overflow: hidden;
  border: 3px solid var(--ink);
  background: #fff7ed;
}
.au-fig img {
  display: block;
  width: 100%;
  height: auto;
}
.au-ph {
  aspect-ratio: 4 / 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px;
  text-align: center;
  background: repeating-linear-gradient(
    135deg,
    #fff7ed 0 14px,
    #fdf4d6 14px 28px
  );
}
.au-ph-mark {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--yellow);
  color: var(--ink);
}
.au-ph figcaption {
  font-size: 0.85rem;
  color: var(--ink-soft);
  max-width: 28ch;
}

/* buttons */
.au-btn,
.au-say {
  font: 700 16px var(--sans);
  cursor: pointer;
  border-radius: 999px;
  border: 2px solid var(--ink);
  background: var(--ink);
  color: #fff;
  min-height: 48px;
  min-width: 48px;
  padding: 8px 20px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.au-btn.ghost {
  background: #fff;
  color: var(--ink);
}
.au-btn.small {
  min-height: 40px;
  padding: 4px 14px;
}
.au-btn:disabled {
  opacity: 0.45;
  cursor: default;
}
.au-btn:hover:not(:disabled) {
  background: #000;
  color: #fff;
}
.au-btn.ghost:hover:not(:disabled) {
  background: var(--yellow-soft);
  color: var(--ink);
}
.au-say {
  background: var(--yellow);
  color: var(--ink);
  padding: 0;
  justify-content: center;
  vertical-align: middle;
  margin-left: 6px;
}
.au-say:hover {
  background: #e6b61d;
}
.au-btn:focus-visible,
.au-say:focus-visible,
.au-linebtn:focus-visible,
.au select:focus-visible,
.au input:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 2px;
}
body.kid-young .au-btn,
body.kid-young .au-say {
  min-height: 56px;
  min-width: 56px;
  font-size: 18px;
}
body.kid-young .au-btn.small {
  min-height: 48px;
}

/* player */
.au-player {
  border: 3px solid var(--ink);
  border-radius: 22px;
  background: var(--yellow-soft);
  padding: 14px 16px;
  margin: 0 0 18px;
}
.au-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}
.au-chk {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  min-height: 48px;
}
.au-chk input {
  width: 22px;
  height: 22px;
}
.au-join {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  font-weight: 700;
}
.au select,
.au input[type="text"] {
  font: 600 16px var(--sans);
  border: 2px solid var(--line-strong);
  border-radius: 10px;
  padding: 8px 10px;
  min-height: 44px;
  background: #fff;
  color: var(--ink);
}
.au-status {
  margin: 8px 0 0;
  min-height: 1.4em;
  font-weight: 700;
  color: var(--blue-ink);
}
.au-mini {
  padding: 10px 14px;
}

/* transcript */
.au-lines {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
}
.au-line {
  margin: 0;
}
.au-linebtn {
  display: block;
  width: 100%;
  text-align: left;
  font: 500 1.1rem/1.6 var(--sans);
  color: var(--ink);
  background: #fff;
  border: 2px solid var(--line);
  border-left: 8px solid var(--line-strong);
  border-radius: 14px;
  padding: 10px 14px;
  cursor: pointer;
}
.au-linebtn:hover {
  border-color: var(--line-strong);
  background: var(--bg-alt);
}
.au-who {
  display: block;
  font: 800 0.72rem/1.2 var(--sans);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 2px;
}
.au-narr .au-linebtn {
  border-left-color: var(--line);
  font-style: normal;
}
.au-line:not(.au-narr) .au-linebtn {
  border-left-color: var(--blue);
  background: var(--blue-soft);
}
.au-line:not(.au-narr) .au-text::before {
  content: "\201C";
}
.au-line:not(.au-narr) .au-text::after {
  content: "\201D";
}
.au-line.on .au-linebtn {
  background: var(--yellow);
  border-color: var(--ink);
  border-left-color: var(--ink);
  font-weight: 700;
  color: var(--ink);
}
.au-line.on .au-who {
  color: var(--ink);
}
.au-line.mine .au-linebtn {
  border-style: dashed;
  border-color: var(--red);
  border-left-color: var(--red);
  background: var(--red-soft);
}
.au-line.mine .au-who::after {
  content: " (your part)";
}
body.kid-young .au-linebtn {
  font-size: 1.45rem;
  line-height: 1.65;
  padding: 14px 18px;
}
body.kid-young .au-who {
  font-size: 0.8rem;
}
.au-voicenote {
  margin-top: 14px;
}
.au-script {
  margin-top: 14px;
}
.au-script summary {
  cursor: pointer;
  font-weight: 700;
  min-height: 44px;
  display: flex;
  align-items: center;
}

/* quiz and exam */
.au-qs,
.au-items {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 18px;
}
.au-items {
  gap: 12px;
  margin-top: 12px;
}
.au-q,
.au-item {
  margin: 0;
}
.au-q fieldset.q {
  border: 2px solid var(--line);
  border-radius: 16px;
  padding: 14px 16px;
  margin: 0;
}
.au-q legend {
  font-weight: 800;
  padding: 0 6px;
}
.au-kind {
  display: inline-block;
  font: 800 0.7rem/1 var(--sans);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--blue-soft);
  color: var(--blue-ink);
  border-radius: 999px;
  padding: 4px 9px;
  margin-right: 6px;
}
.au .opt span {
  min-height: 48px;
}
body.kid-young .au .opt span {
  min-height: 56px;
  font-size: 1.15rem;
}
.au-fb {
  margin: 6px 0 0;
  font-weight: 700;
  min-height: 1.3em;
}
.au-q.right fieldset,
.au-item.right {
  border-color: var(--green);
}
.au-q.try fieldset,
.au-item.try {
  border-color: var(--red);
}
.au-q.right .au-fb,
.au-item.right .au-mark {
  color: var(--green);
}
.au-q.try .au-fb,
.au-item.try .au-mark {
  color: var(--red-ink);
}
.au-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 22px 0 8px;
}
.au-score {
  font: 800 1.1rem var(--display);
  margin: 6px 0 12px;
  min-height: 1.4em;
}
.au-key {
  margin-top: 14px;
}
.au-key summary,
.au-script summary {
  font-weight: 700;
}
.au-task {
  border: 2px solid var(--line-strong);
  border-radius: 20px;
  padding: 8px 18px 18px;
  margin: 22px 0;
  background: #fff;
}
.au-task h2 {
  margin-top: 14px;
}
.au-heading {
  font-weight: 700;
  color: var(--ink-soft);
}
.au-opts {
  list-style: none;
  margin: 12px 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 8px;
}
.au-opts li {
  background: var(--bg-alt);
  border: 2px solid var(--line-strong);
  border-radius: 12px;
  padding: 8px 12px;
  font-weight: 600;
}
.au-opts b {
  display: inline-grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--ink);
  color: #fff;
  margin-right: 6px;
}
.au-example {
  background: var(--yellow-soft);
  border-radius: 10px;
  padding: 8px 12px;
  display: inline-block;
}
.au-item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  border-left: 6px solid var(--line-strong);
  padding: 4px 0 4px 12px;
}
.au-item label {
  font-weight: 700;
}
.au-item fieldset {
  border: 0;
  padding: 0;
  margin: 0;
  min-width: 0;
}
.au-item legend {
  font-weight: 800;
  padding: 0;
}
.au-mark {
  font-weight: 800;
}
.au-scene {
  display: block;
  width: 100%;
  max-width: 560px;
  background: #fff7ed;
  border: 3px solid var(--ink);
  border-radius: 20px;
}
.au-scene [data-part] > * {
  fill: #fff;
  stroke: var(--ink);
  stroke-width: 3;
  stroke-linejoin: round;
}
.au-scene path[fill="none"],
.au-scene > path {
  fill: none;
}

/* cards and lists */
.au-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px;
}
.au-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-decoration: none;
  color: var(--ink);
  border: 2px solid var(--ink);
  border-radius: 18px;
  padding: 14px 16px;
  background: #fff;
}
.au-card:hover {
  background: var(--yellow-soft);
  color: var(--ink);
}
.au-card b {
  font: 800 1.1rem/1.2 var(--display);
}
.au-card > span:last-child {
  font-size: 0.92rem;
  color: var(--ink-soft);
}
.au-tag {
  align-self: flex-start;
  font: 800 0.7rem/1 var(--sans);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--yellow);
  border-radius: 999px;
  padding: 4px 9px;
}
.au-how {
  max-width: 70ch;
}
.au-how li {
  margin-bottom: 8px;
}
.au-vocab dl {
  margin: 0;
  display: grid;
  gap: 4px 16px;
  grid-template-columns: max-content 1fr;
  align-items: center;
}
.au-vocab dt {
  display: flex;
  align-items: center;
  gap: 4px;
}
.au-vocab dd {
  margin: 0;
}
@media (max-width: 520px) {
  .au-vocab dl {
    grid-template-columns: 1fr;
  }
  .au-vocab dd {
    margin-bottom: 8px;
  }
}
.au-phrases ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 8px;
}
.au-phrases li {
  display: flex;
  align-items: center;
  gap: 8px;
}
.au-phrases .au-say {
  margin: 0;
  flex: none;
}
.au-echo {
  border: 2px dashed var(--line-strong);
  border-radius: 20px;
  padding: 4px 18px 18px;
  margin-top: 36px;
}
.au-echo-line {
  margin: 10px 0;
}
.au-foot {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 36px;
}
.au .btn {
  min-height: 48px;
}

@media (prefers-reduced-motion: reduce) {
  .au * {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}

@media print {
  header.top,
  footer,
  .skip,
  .au-controls,
  .au-join,
  .au-actions,
  .au-echo,
  .au-foot,
  .au-status,
  .au-voicenote,
  .au-say,
  .au-side,
  .au-player,
  .au-fig,
  .crumbs,
  .au-fb,
  .au-mark {
    display: none !important;
  }
  .au {
    padding: 0;
  }
  .au-linebtn {
    border: 0 !important;
    background: none !important;
    padding: 2px 0 !important;
    font-size: 12pt !important;
  }
  .au-grid {
    display: block;
  }
  .au-key {
    display: none;
  }
  .au-script:not([open]) > .au-lines {
    display: none;
  }
  .au-q {
    break-inside: avoid;
  }
}

/* QA3 a11y: young tier target size */
body.kid-young .au-chk{min-height:56px}