.learning-screen .card {
  border-radius: 23px;
}
.learning-stages {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 5px;
  margin: 0 0 20px;
}
.stage-tab {
  min-height: 65px;
  padding: 10px 2px;
  border-radius: 13px;
  border: 1px solid #dce7f8;
  background: #fff;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.45;
  font-weight: 700;
  display: flex;
  align-items: center;
  flex-direction: column;
  gap: 6px;
}
.stage-tab span {
  font-size: 10px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #eaf2ff;
  color: var(--blue);
  display: grid;
  place-items: center;
}
.stage-tab.active {
  background: var(--blue);
  color: white;
  border-color: var(--blue);
  box-shadow: 0 4px 10px #2676e91a;
}
.stage-tab.active span {
  background: #fff;
  color: var(--blue);
}
.toc-panel {
  padding: 17px;
}
.toc-panel h2 {
  font-size: 18px;
}
.toc-toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 16px 0 10px;
  font-size: 11px;
  color: var(--muted);
}
.toc-toolbar .muted {
  margin-right: auto;
  font-size: 10px;
}
.toc-toolbar button {
  background: #eff5fd;
  border-radius: 8px;
  min-width: 29px;
  height: 29px;
  font-size: 13px;
  color: #4c6799;
}
.toc-toolbar button:last-child {
  padding: 0 9px;
  font-size: 10px;
}
.toc-viewport {
  overflow: auto;
  width: 100%;
  height: 410px;
  background-color: #f5f9ff;
  background-image: radial-gradient(#d4e0f3 0.7px, transparent 0.7px);
  background-size: 15px 15px;
  border: 1px solid #e0eafa;
  border-radius: 17px;
  touch-action: none;
  cursor: grab;
  overscroll-behavior: contain;
}
.toc-viewport:active {
  cursor: grabbing;
}
.toc-size {
  position: relative;
  margin: 20px;
}
.toc-tree {
  position: absolute;
  left: 0;
  top: 0;
  transform-origin: 0 0;
}
.toc-tree,
.toc-tree ul {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
  padding: 0;
  margin: 0;
  width: max-content;
}
.toc-tree ul {
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
  padding-left: 25px;
  border-left: 2px solid #a9c7ed;
}
.toc-tree li {
  display: flex;
  align-items: center;
  gap: 26px;
  position: relative;
}
.toc-tree ul > li:before {
  content: "";
  width: 26px;
  position: absolute;
  left: -27px;
  top: 50%;
  border-top: 2px solid #a9c7ed;
}
.toc-box {
  width: 154px;
  height: 92px;
  border: 1px solid #aecaef;
  background: white;
  border-radius: 14px;
  padding: 12px;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  gap: 7px;
  text-align: center;
  position: relative;
  box-shadow: 0 3px 8px #497ed908;
}
.toc-box strong {
  font-size: 13px;
  font-weight: 650;
  line-height: 1.4;
}
.toc-box.central {
  background: #e2efff;
  border-color: #6ba4f1;
  color: #1858c4;
}
.toc-box input {
  width: 100%;
  border: 1px dashed #91b4e5;
  border-radius: 7px;
  background: #fff;
  padding: 9px 5px;
  font-size: 12px;
  text-align: center;
  min-width: 0;
  color: var(--ink);
}
.toc-box input::placeholder {
  color: #b4bdce;
}
.toc-box button {
  width: 100%;
  height: 100%;
  font-size: 13px;
  line-height: 1.4;
}
.toc-box .hidden-node {
  color: #9aacca;
  font-size: 11px;
}
.toc-box.correct {
  border: 2px solid var(--green);
  background: #ecfcf4;
}
.toc-box.partial {
  border: 2px solid #e8b64f;
  background: #fff9ea;
}
.toc-box.wrong {
  border: 2px solid #ea9275;
  background: #fff4ef;
}
.toc-number {
  font-size: 10px;
  color: #85a2ca;
}
.toc-feedback-row {
  font-size: 12px;
  padding: 12px 0;
  border-bottom: 1px solid #e7dfd8;
}
.toc-feedback-row:last-child {
  border: 0;
}
.toc-feedback-row span {
  font-size: 11px;
  color: #7c869e;
}
.concept-header {
  display: flex;
  align-items: center;
  gap: 13px;
  margin: 25px 0 18px;
}
.concept-header h2 {
  font-size: 27px;
}
.keyword-definition {
  border-radius: 17px;
  padding: 20px;
  background: linear-gradient(140deg, #eef5ff, #f6faff);
  line-height: 1.9;
  color: #263e68;
  margin: 15px 0;
}
.keyword-definition .rich-text {
  font-size: 15px;
}
.concept-aside {
  padding: 16px;
  margin-top: 15px;
  border-left: 3px solid #15c895;
  background: #f0fcf7;
  border-radius: 0 13px 13px 0;
  font-size: 12px;
}
.concept-aside strong {
  color: #079b70;
}
.concept-aside p {
  margin-top: 6px;
  line-height: 1.7;
  color: #6a8295;
}
.concept-aside.caution {
  background: #fffbf1;
  border-color: #efc36b;
}
.concept-aside.caution strong {
  color: #bc8a2e;
}
.choice-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 22px;
}
.ox-button {
  background: #fff;
  border: 1px solid #dae5f5;
  border-radius: 17px;
  min-height: 110px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  gap: 7px;
  color: #7585a4;
}
.ox-button strong {
  font-size: 39px;
  color: var(--blue);
  font-weight: 650;
  line-height: 1;
}
.ox-button:last-child strong {
  color: #ea8764;
}
.ox-button.selected {
  border-color: var(--blue);
  background: #eff6ff;
}
.ox-button:disabled {
  opacity: 1;
  cursor: default;
}
.keyword-recall {
  min-height: 265px;
}
.keyword-recall .eyebrow {
  margin-top: 12px;
}
.keyword-recall .question {
  font-size: 26px;
}
.socratic-setup {
  text-align: center;
  padding-bottom: 28px;
}
.socratic-portrait {
  height: 230px;
  margin: 20px auto 10px;
  position: relative;
  background: radial-gradient(ellipse at center, #e8f3ff 0, transparent 70%);
}
.socratic-portrait img {
  width: 240px;
  height: 230px;
  object-fit: contain;
  object-position: center;
}
.socratic-setup h1 {
  font-size: 27px;
  margin: 15px 0 10px;
}
.socratic-scene {
  position: relative;
  margin: 16px 0 24px;
  min-height: 335px;
  background: radial-gradient(ellipse at center, #e1f0ff 0, transparent 70%);
  padding-bottom: 20px;
}
.socratic-scene > img {
  width: 100%;
  height: 260px;
  object-fit: contain;
  object-position: center;
}
.socratic-speech {
  position: relative;
  padding: 18px 20px;
  background: white;
  border: 1px solid #d6e6fb;
  border-radius: 19px;
  box-shadow: 0 8px 20px #275b9910;
  margin: -8px 5px 0;
}
.socratic-speech:before {
  content: "";
  position: absolute;
  top: -8px;
  left: 45%;
  width: 14px;
  height: 14px;
  border-left: 1px solid #d6e6fb;
  border-top: 1px solid #d6e6fb;
  background: white;
  transform: rotate(45deg);
}
.socratic-speech .rich-text {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.75;
}
.socratic-history .chat-bubble {
  font-size: 12px;
}
.blank-mode {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid #d7e4f7;
  border-radius: 13px;
  padding: 4px;
  background: #edf4ff;
  margin-bottom: 16px;
  gap: 4px;
}
.blank-mode button {
  padding: 11px 5px;
  color: var(--muted);
  font-weight: 700;
  font-size: 12px;
  border-radius: 9px;
}
.blank-mode button.active {
  background: white;
  color: var(--blue);
  box-shadow: 0 2px 4px #2c65960c;
}
.blank-toolbar,
.blank-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin: 12px 0;
}
.blank-toolbar button,
.blank-tools button {
  font-size: 11px;
  padding: 8px 10px;
  border-radius: 9px;
  background: #eff5ff;
  color: #5d749b;
  min-height: 34px;
}
.blank-toolbar button.active,
.blank-tools button.active {
  color: #fff;
  background: var(--blue);
}
.blank-canvas {
  display: block;
  width: 100%;
  height: 380px;
  border: 1px solid #d7e5f7;
  border-radius: 16px;
  background: white;
  touch-action: none;
}
.blank-text {
  min-height: 350px !important;
  line-height: 1.9 !important;
  background: repeating-linear-gradient(
    white 0,
    white 29px,
    #e9f1fb 30px
  ) !important;
  padding-top: 10px !important;
}
.blank-feedback {
  margin-top: 17px;
  padding: 18px;
  background: #f1f8ff;
  border-radius: 16px;
  line-height: 1.85;
  font-size: 14px;
  white-space: pre-wrap;
}
.blank-feedback:empty {
  display: none;
}
.blank-help {
  font-size: 11px;
  color: var(--muted);
  line-height: 1.6;
  margin: 10px 0;
}
.authored-content table {
  border-collapse: collapse;
  width: 100%;
  font-size: 13px;
  margin: 16px 0;
}
.authored-content td,
.authored-content th {
  border: 1px solid #d3e1f2;
  padding: 9px;
}
.authored-content svg {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 14px auto;
}
.question-figure {
  margin: 16px 0;
}
.authored-content {
  overflow-x: auto;
}
.study-screen .row .button {
  font-size: 12px;
  padding: 11px;
}
.study-screen .stack > .card h2 {
  margin: 10px 0 16px;
}
.study-screen [data-reader] .rich-text {
  font-size: inherit;
}
.study-screen [data-study-feedback] > .card {
  margin-top: 16px;
  background: #f2f9ff;
  border-color: #dcecfb;
}
@media (max-width: 360px) {
  .toc-panel {
    padding: 13px;
  }
  .stage-tab {
    font-size: 9px;
  }
  .toc-toolbar {
    gap: 6px;
  }
  .learning-screen .card {
    padding: 17px;
  }
  .socratic-scene > img {
    height: 220px;
  }
  .socratic-scene {
    min-height: 300px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .toc-viewport {
    scroll-behavior: auto;
  }
}
.toc-box {
  width: 138px;
  height: 76px;
  padding: 8px;
  gap: 5px;
}
.toc-box strong {
  font-size: 12px;
}
.toc-box input {
  font-size: 11px;
  padding: 7px 4px;
}
.blank-canvas[hidden],
.blank-text[hidden],
.blank-toolbar[hidden] {
  display: none;
}
.blank-unit {
  display: flex;
  flex-direction: column;
  gap: 7px;
  margin-bottom: 20px;
}
.blank-unit > span {
  font-size: 11px;
  color: var(--muted);
}
.blank-unit > strong {
  font-size: 17px;
  line-height: 1.5;
}
.blank-pan-help {
  font-size: 10px;
  color: var(--muted);
  margin: 10px 0;
}
.toc-box input {
  font-size: 16px;
}
.blank-canvas-wrap[hidden] {
  display: none;
}
/* LayerLab original-image implementation. Geometry normalized to 426px width.
   All text, inputs, grading and the source tree remain live DOM content. */
.precise-learning { padding: 20px 23px 90px; min-height:100dvh; color:#090e3e; }
.precise-learning .page-header { margin:0 0 21px; min-height:57px; }
.precise-learning .page-header > div { width:100%; text-align:center; padding:0 23px; }
.precise-learning .page-header h1 { font-size:22px; line-height:1.35; letter-spacing:-.8px; }
.precise-learning .page-header p { font-size:13px; color:#7988ab; line-height:1.5; margin-top:4px; }
.precise-learning .page-header .icon-button { position:absolute; width:28px; height:32px; background:none; border:0; box-shadow:none; padding:0; }
.precise-learning .card { border:0; border-radius:17px; padding:16px; box-shadow:0 8px 26px #a3d2f223; margin:0; background:#fff; }
.precise-learning .button { min-height:46px; padding:10px 13px; border-radius:10px; font-size:15px; font-weight:650; gap:7px; }
.precise-learning .button.primary { background:linear-gradient(105deg,#176eff,#0e7aff); box-shadow:0 4px 11px #7abfff19; }
.precise-learning .button.secondary { border:1px solid #c4d9ff; color:#586d94; background:#fff; box-shadow:none; }
.precise-learning .chip { background:#e8f3ff; color:#0873ff; border:0; border-radius:14px; padding:4px 11px; font-size:13px; line-height:1.35; font-weight:700; }
.precise-learning .learning-stages { margin:0; gap:8px; }
.precise-learning .stage-tab { display:flex; flex-direction:row; align-items:center; justify-content:flex-start; min-height:41px; border:1px solid #deebfc; border-radius:17px; background:#ffffff90; color:#7685a6; font-size:13px; letter-spacing:-.35px; padding:6px 9px; gap:10px; box-shadow:0 1px 4px #5f9ddb0b; line-height:1.3; white-space:nowrap; }
.precise-learning .stage-tab > span { width:28px; height:28px; flex:none; font-size:14px; background:#e9eff5; color:#7383a3; border-radius:50%; }
.precise-learning .stage-tab.active { color:#fff; background:linear-gradient(105deg,#1179ff,#1683ff); border-color:#127dff; box-shadow:0 3px 8px #57a3ff21; }
.precise-learning .stage-tab.active > span { color:#0b78ff; background:#fff; }
.precise-learning .stage-tab.done:not(.active) > span { color:#fff; background:linear-gradient(120deg,#48d69a,#08935e); }
.precise-learning .keyword-stages { grid-template-columns:repeat(2,minmax(0,1fr)); }
.precise-learning .learning-heading { margin:24px 3px 18px; }
.precise-learning .learning-heading h2 { font-size:22px; line-height:1.35; letter-spacing:-.7px; }
.precise-learning .learning-heading p { font-size:14px; color:#7a89ac; margin-top:4px; line-height:1.45; }
.precise-learning .learning-bottom { display:flex; flex-direction:column; gap:8px; margin-top:12px; }
.precise-learning .learning-save { font-size:10px; color:#8091ae; width:max-content; align-self:center; padding:5px 15px; }
.precise-learning .learning-save:not(:focus-visible) { position:absolute; width:1px; height:1px; overflow:hidden; padding:0; clip-path:inset(50%); }
.precise-learning .concept-card { padding:18px 16px; }
.precise-learning .concept-top { display:flex; align-items:center; gap:10px; justify-content:space-between; }
.precise-learning .concept-top h2 { font-size:25px; line-height:1.4; margin-top:8px; letter-spacing:-.6px; }
.precise-learning .concept-top .button { color:#0b70ff; font-size:12px; padding:8px; min-height:38px; white-space:nowrap; background:#f7fbff; }
.precise-learning .keyword-definition { margin:15px 0 12px; padding:17px; border:1px solid #e1edff; border-radius:9px; background:linear-gradient(110deg,#f6faff,#f4f9fe); color:#10183f; line-height:1.7; }
.precise-learning .keyword-definition .rich-text { font-size:18px; line-height:1.7; font-weight:500; letter-spacing:-.3px; }
.precise-learning .concept-aside { display:flex; align-items:center; gap:10px; padding:10px; border:1px solid #d6e7ff; border-radius:9px; background:#f1f7ff; margin:10px 0; font-size:13px; min-height:60px; }
.precise-learning .concept-aside > span { display:grid; place-items:center; width:37px; height:37px; border-radius:50%; background:#e2efff; color:#0e7eff; flex:none; }
.precise-learning .concept-aside strong { color:#1178ff; font-size:13px; }
.precise-learning .concept-aside p { margin-top:3px; font-size:14px; line-height:1.5; color:#546581; }
.precise-learning .concept-aside.caution { border-color:#ffedbf; background:#fffbf0; }
.precise-learning .concept-aside.caution strong,.precise-learning .concept-aside.caution > span { color:#c27900; }
.precise-learning .concept-aside.caution > span { background:#fff4db; }
.precise-learning .concept-aside.caution p { color:#665236; }
.precise-learning .concept-note { margin-top:12px; }
.precise-learning .keyword-pagination { display:flex; align-items:center; justify-content:center; gap:24px; height:43px; margin:0 0 2px; color:#7f8cad; font-size:13px; }
.precise-learning .keyword-pagination button { display:grid; place-items:center; width:36px; height:36px; border-radius:50%; border:1px solid #e0ecff; background:#fff; color:#365076; }
.precise-learning .keyword-pagination button:disabled { opacity:.48; cursor:default; background:#e9f0f8; }
.precise-learning .keyword-ox-card { padding:16px; }
.precise-learning .keyword-ox-card .keyword-definition { margin-top:10px; min-height:85px; }
.precise-learning .choice-grid { gap:8px; margin:10px 0; }
.precise-learning .ox-button { min-height:51px; flex-direction:row; gap:13px; border-radius:10px; background:#f5f9ff; border-color:#d8e6ff; color:#596c8f; }
.precise-learning .ox-button > i { width:27px; height:27px; border:4px solid #d8e3f3; border-radius:50%; display:grid; place-items:center; flex:none; }
.precise-learning .ox-button strong,.precise-learning .ox-button:last-child strong { color:inherit; font-size:16px; line-height:1.3; }
.precise-learning .ox-button.selected { color:#fff; background:linear-gradient(105deg,#0e7cff,#1769ff); border-color:#126fff; }
.precise-learning .ox-button.selected > i { border:0; background:#fff; color:#1684ff; }
.precise-learning .ox-feedback { margin:11px 0 10px; background:#edfbf7; border:1px solid #cdf2e7; border-radius:9px; padding:11px; }
.precise-learning .ox-feedback h3 { display:flex; align-items:center; gap:11px; color:#098560; font-size:17px; }
.precise-learning .ox-feedback h3 > span { display:grid; place-items:center; width:30px; height:30px; border-radius:50%; color:#fff; background:#1eaa79; flex:none; }
.precise-learning .ox-feedback.wrong { background:#fff6f1; border-color:#f8ddcf; }
.precise-learning .ox-feedback.wrong h3 { color:#c96a4a; }
.precise-learning .ox-feedback.wrong h3 > span { background:#e27d5c; }
.precise-learning .ox-answer-summary { display:grid; grid-template-columns:1fr 1fr; gap:8px; padding-bottom:10px; margin:9px 0; border-bottom:1px solid #c6dddd; }
.precise-learning .ox-answer-summary > div { display:flex; flex-direction:column; text-align:center; background:#ffffffdc; border-radius:9px; padding:8px; gap:3px; }
.precise-learning .ox-answer-summary span { color:#8190ad; font-size:12px; font-weight:600; }
.precise-learning .ox-answer-summary strong { font-size:17px; color:#0d123d; }
.precise-learning .ox-reason { background:#ffffffdc; border-radius:9px; padding:8px 10px; }
.precise-learning .ox-reason > strong { font-size:12px; color:#53627d; }
.precise-learning .ox-reason .rich-text { font-size:14px; line-height:1.6; color:#273950; margin-top:3px; }
.precise-learning .keyword-classify-card { padding:14px 13px 13px; }
.precise-learning .keyword-classify-list { display:flex; flex-direction:column; gap:11px; }
.precise-learning .keyword-classify-item { border:1px solid #e1ecfb; border-radius:9px; padding:10px 11px; }
.precise-learning .keyword-classify-row { display:flex; align-items:center; gap:5px; min-height:36px; }
.precise-learning .keyword-classify-row > strong { font-size:14px; flex:1; min-width:0; letter-spacing:-.55px; line-height:1.4; }
.precise-learning .keyword-classify-row button { font-size:12px; border:1px solid #dbe5f6; border-radius:9px; color:#7f8daa; background:#fff; padding:8px 9px; white-space:nowrap; min-height:35px; }
.precise-learning .keyword-classify-row [data-meaning] { color:#1c7cff; background:#f8fbff; border-color:#c9dcff; }
.precise-learning .keyword-classify-row .know.selected { color:#099668; border-color:#90d8b9; background:#edf9f2; }
.precise-learning .keyword-classify-row .unknown.selected { color:#ea3039; border-color:#f8a6ad; background:#fff3f3; }
.precise-learning .meaning-definition { border-top:1px solid #e6eff9; padding-top:8px; margin-top:8px; font-size:13px; line-height:1.6; color:#536587; }
.precise-learning .classified-count { text-align:center; font-size:14px; color:#8493af; margin:23px 0 15px; }
.precise-learning .keyword-info { display:flex; align-items:center; gap:11px; padding:12px; border-radius:9px; background:#edf4ff; color:#1974ff; font-size:14px; font-weight:600; line-height:1.45; }
.precise-learning .keyword-info svg { flex:none; }
.precise-learning .route-keyword-classify .keyword-bottom { margin-top:15px; }
.precise-learning .repeat-progress { display:grid; grid-template-columns:1.3fr 1fr; align-items:center; gap:15px; padding:13px 16px; margin:0 0 8px; }
.precise-learning .repeat-progress > div:last-child { border-left:1px solid #dce7f8; padding-left:14px; }
.precise-learning .repeat-progress strong { font-size:15px; white-space:nowrap; }
.precise-learning .repeat-progress b { color:#0b7aff; font-size:24px; margin:0 3px; }
.precise-learning .repeat-progress p { font-size:11px; color:#8192b2; white-space:nowrap; line-height:1.5; }
.precise-learning .repeat-progress .progress-track { margin:4px 0 0; height:13px; border-radius:9px; background:#eaf1f8; }
.precise-learning .repeat-progress .progress-track > span { background:#147aff; }
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.precise-learning .keyword-repeat-card fieldset { margin:14px 0 10px; padding:11px 18px 17px; min-width:0; }
.precise-learning .keyword-repeat-card legend { color:#137eff; background:#e8f5ff; font-size:13px; border-radius:15px; padding:4px 11px; font-weight:700; margin-left:-12px; }
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.precise-learning .repeat-hint button { display:flex; gap:7px; align-items:center; color:#0b7cff; padding:8px 12px; background:#edf5ff; border:1px solid #dce9fb; border-radius:10px; font-weight:600; font-size:13px; }
.precise-learning .repeat-hint > span { padding-left:15px; border-left:1px solid #dce7fa; }
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.precise-learning [data-keyword-repeat-form] .field::placeholder { color:#98a8c4; }
.precise-learning .keyword-repeat-card > .button.secondary { color:#132042; }
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.precise-learning .repeat-result p { margin:5px 0 8px; }
.precise-learning .repeat-result.wrong { background:#fff8f0; border-color:#f3dfc3; }
.precise-learning .repeat-footer { display:flex; align-items:center; justify-content:space-between; gap:7px; margin:3px 3px; font-size:12px; }
.precise-learning .repeat-footer > span,.precise-learning .repeat-footer > button { display:flex; align-items:center; gap:6px; }
.precise-learning .repeat-footer > span { color:#899ab9; }
.precise-learning .repeat-footer > button { color:#1080ff; padding:0; white-space:nowrap; font-weight:600; font-size:13px; }
/* Source TOC geometry: native branching layout, no labels burned into a bitmap. */
.precise-learning[class*="route-toc"] { padding:12px 14px 84px; }
.precise-learning[class*="route-toc"] .page-header { min-height:64px; margin:0 0 14px; }
.precise-learning[class*="route-toc"] .page-header > div { text-align:left; padding-left:64px; }
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.precise-learning[class*="route-toc"] .page-header p { font-size:12px; }
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.precise-learning .toc-stages .stage-tab.active > span { color:#fff; background:#1476ff; }
.precise-learning .learning-tip { display:flex; align-items:center; gap:11px; margin:12px 0 9px; border-radius:9px; background:#eafbf5; color:#098556; min-height:39px; padding:8px 12px; font-size:12px; line-height:1.5; }
.precise-learning .learning-tip svg { color:#ffc95a; flex:none; }
.precise-learning .toc-panel { padding:0; border:1px solid #cae2ff; border-radius:10px; overflow:hidden; background:#fff; }
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.precise-learning .toc-toolbar h2 { display:flex; align-items:center; gap:7px; flex:1; font-size:13px; white-space:nowrap; letter-spacing:-.2px; }
.precise-learning .toc-toolbar h2 > svg { color:#0f77ff; }
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.precise-learning .toc-toolbar [data-zoom-label] { color:#087746; font-size:11px; font-weight:700; }
.precise-learning .toc-toolbar button:last-child { width:auto; padding:0 7px; gap:4px; color:#086bff; font-size:11px; white-space:nowrap; }
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.precise-learning .toc-viewport { height:538px; border:0; border-radius:9px; background:#fff; scrollbar-width:auto; scrollbar-color:#bfc1c3 #eff1f2; }
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.precise-learning .toc-box input::placeholder { color:#a9b6c8; opacity:1; }
.precise-learning .toc-box.central input::placeholder { color:#dceaff; }
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.precise-learning .hidden-node { display:flex; align-items:center; justify-content:center; gap:14px; color:inherit; }
.precise-learning .hidden-node b { letter-spacing:4px; font-size:16px; }
.precise-learning .toc-box.correct { border:2px solid #42b887; background:#eafaf1; }
.precise-learning .toc-box.partial { border:2px solid #e8bc52; background:#fff9e9; }
.precise-learning .toc-box.wrong { border:2px solid #ea9275; background:#fff4ef; }
.precise-learning .toc-minimap { position:absolute; right:7px; bottom:23px; width:110px; height:73px; border:1px solid #e0eafa; border-radius:9px; background:#ffffffdf; box-shadow:0 4px 12px #a6c9f02b; pointer-events:none; display:grid; place-items:center; }
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.precise-learning .toc-minimap [data-toc-mini-tree] i { position:absolute; background:#dce3ed; border-radius:1px; opacity:.65; }
.precise-learning .toc-minimap > i { position:absolute; inset:20px 14px 10px 25px; background:#9dc7ff30; border:1px solid #2680ff; border-radius:4px; }
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/* Socrates imagery is a corrected LayerLab decoration crop, never a page background. */
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.precise-learning .socratic-note strong { font-size:20px; line-height:1.3; letter-spacing:-.65px; overflow-wrap:anywhere; }
.precise-learning .socratic-note > svg { color:#7b86a7; flex:none; }
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.precise-learning .socratic-introduction h2 { font-size:15px; letter-spacing:-.5px; line-height:1.4; }
.precise-learning .socratic-introduction p { color:#8996b7; font-size:12px; line-height:1.5; letter-spacing:-.2px; margin-top:7px; }
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.precise-learning .socratic-features .card:not(:last-child) .feature-step:after { content:""; position:absolute; top:28px; width:3px; height:53px; border-radius:3px; background:#15d1a6; box-shadow:0 0 0 3px #fff; }
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.precise-learning .socratic-mode-buttons .selected { border-color:#0777ff; background:#e8f4ff; color:#0775ff; box-shadow:0 0 0 1px #0777ff; }
.precise-learning .socratic-mode p { font-size:10px; color:#8896b7; text-align:center; margin-top:6px; white-space:nowrap; }
.precise-learning.route-socratic > .button { min-height:45px; font-size:19px; border-radius:12px; }
.precise-learning.route-socratic-live { margin:16px 19px; padding:20px 12px 20px; border:2px solid #fff; border-radius:28px; min-height:calc(100dvh - 32px); background:#ffffff60; }
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.precise-learning .socratic-live-meta b { color:#155dff; font-size:17px; }
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.precise-learning .live-badge i { width:9px; height:9px; border-radius:50%; background:#02c894; }
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.precise-learning .socratic-quick-actions button:nth-child(2) { color:#1973ff; border-color:#c4ddff; background:#f0f7ff; flex:1.3; }
.precise-learning .socratic-quick-actions button:last-child { color:#8f43ff; border-color:#d8c7ff; background:#faf5ff; }
.precise-learning .socratic-return { display:flex; align-items:center; justify-content:center; gap:10px; background:#fff; box-shadow:0 4px 14px #92bcea16; border-radius:20px; width:100%; height:31px; font-size:12px; color:#8192b2; font-weight:600; }
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.precise-learning .socratic-composer > button { display:grid; place-items:center; width:47px; height:47px; background:#126fff; color:white; border-radius:50%; align-self:center; }
.precise-learning [data-speech-state] { width:100%; color:#7f91b2; font-size:11px; }
.precise-learning [data-speech-state]:empty { display:none; }
.precise-learning .socratic-finish { display:block; margin:10px auto 0; color:#8190ad; font-size:10px; }
/* Blank test uses a real editable canvas and retained draft coordinates. */
.precise-blank { padding:20px 23px 26px; color:#0b103c; }
.precise-blank .page-header { min-height:53px; margin:0 0 16px; }
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.precise-blank .page-header h1 { font-size:22px; letter-spacing:-.6px; }
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.precise-blank .card { margin:0; border:0; border-radius:17px; box-shadow:0 8px 26px #8fc1e922; }
.precise-blank .blank-unit { display:flex; flex-direction:row; align-items:center; padding:17px 18px; gap:19px; margin-bottom:10px; min-height:88px; }
.precise-blank .blank-unit-icon { display:grid; place-items:center; width:55px; height:55px; border-radius:14px; flex:none; color:#0d79ff; background:#eaf5ff; }
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.precise-blank .blank-unit > div > span { color:#5d769d; font-size:13px; }
.precise-blank .blank-unit strong { font-size:21px; line-height:1.4; letter-spacing:-.7px; }
.precise-blank .blank-card { padding:20px 12px 15px; }
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.precise-blank .blank-intro > span { display:grid; place-items:center; width:48px; height:48px; border-radius:50%; color:#0f7bff; background:#ecf6ff; flex:none; }
.precise-blank .blank-intro strong { font-size:16px; letter-spacing:-.7px; line-height:1.5; }
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.precise-blank .blank-mode button.active { color:#fff; background:linear-gradient(110deg,#1975ff,#1371ff); box-shadow:0 4px 8px #81b9f732; }
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.precise-blank .blank-toolbar > button.active { color:#087bff; background:none; position:relative; }
.precise-blank .blank-toolbar > button.active:after { position:absolute; content:""; width:60%; bottom:0; height:2px; background:#0782ff; border-radius:2px; }
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.precise-blank .blank-extra-tools button { background:#eef5ff; color:#3e6595; font-size:11px; padding:6px; border-radius:4px; }
.precise-blank .blank-extra-tools button.active { color:white; background:#1269ff; }
.precise-blank .blank-canvas-wrap { position:relative; border:1px solid #cce2ff; border-radius:10px; overflow:hidden; }
.precise-blank .blank-canvas { border:0; border-radius:0; width:100%; height:378px; background:#fff; }
.precise-blank .blank-pan-help { position:absolute; bottom:9px; left:10px; right:10px; display:flex; align-items:center; justify-content:center; gap:8px; font-size:11px; color:#91a4c3; pointer-events:none; margin:0; }
.precise-blank .blank-text { min-height:420px!important; border:1px solid #cce2ff; border-radius:10px; background:#fff!important; padding:14px!important; font-size:16px; width:100%; }
.precise-blank .blank-actions { display:grid; grid-template-columns:1fr 1.4fr; gap:10px; margin:16px 1px 18px; }
.precise-blank .blank-actions > button { display:flex; gap:10px; justify-content:center; align-items:center; min-height:44px; border-radius:8px; font-size:16px; padding:8px 10px; font-weight:600; }
.precise-blank .blank-actions > .primary { background:linear-gradient(110deg,#1471ff,#1776ff); }
.precise-blank .blank-actions > .secondary { border:1px solid #0876ff; background:#fff; color:#1680ff; }
.precise-blank .blank-actions > button:only-child { grid-column:1/-1; }
.precise-blank .blank-return { display:flex; align-items:center; justify-content:center; gap:10px; color:#6d85a7; font-size:12px; font-weight:600; width:100%; padding:7px 0 0; }
.precise-blank .blank-return > span { height:1px; background:#d9e8fb; flex:1; }
.precise-blank .blank-feedback { margin:11px 0 0; }
@media(max-width:380px) {
 .precise-learning { padding-left:16px; padding-right:16px; }
 .precise-learning .stage-tab { font-size:11px; gap:7px; padding:6px; }
 .precise-learning .keyword-classify-row { flex-wrap:wrap; }
 .precise-learning .keyword-classify-row > strong { flex-basis:100%; }
 .precise-learning .keyword-classify-row button { flex:1; }
 .precise-learning .toc-stages .stage-tab { font-size:8px; padding:4px; gap:3px; }
 .precise-learning .toc-stages .stage-tab > span { width:16px; height:16px; font-size:9px; }
 .precise-learning .toc-toolbar { gap:5px; padding:7px; }
 .precise-learning .toc-toolbar h2 { font-size:11px; gap:4px; }
 .precise-learning .socratic-introduction .socratic-speech { width:180px; padding:12px; }
 .precise-learning .socratic-features .card { gap:10px; padding-left:43px; }
 .precise-learning .socratic-features h2 { font-size:14px; }
 .precise-learning .socratic-features p { font-size:10px; }
 .precise-learning .socratic-mode { gap:9px; padding:9px; }
 .precise-learning .socratic-mode h2 { font-size:12px; }
 .precise-learning .socratic-mode-buttons button { gap:4px; font-size:12px; }
 .precise-learning .socratic-mode p { font-size:8px; }
 .precise-learning.route-socratic .page-header h1 { font-size:22px; }
 .precise-learning.route-socratic .page-header p { font-size:11px; }
 .precise-learning .socratic-scene .socratic-speech { width:185px; }
 .precise-learning .socratic-quick-actions button { gap:4px; font-size:11px; padding:5px; }
 .precise-blank { padding-left:16px; padding-right:16px; }
 .precise-blank .blank-intro { gap:10px; }
 .precise-blank .blank-intro strong { font-size:14px; }
 .precise-blank .blank-intro p { font-size:12px; }
}
.precise-learning:not([class*="route-toc"]):not(.route-socratic):not(.route-socratic-live) .page-header { min-height:43px; }
.precise-learning .keyword-definition .rich-text { font-size:20px; line-height:1.6; }
.precise-learning .socratic-character { mix-blend-mode:normal; }
.precise-learning .socratic-introduction .socratic-character { clip-path:polygon(0 100%,3% 90%,13% 77%,24% 73%,26% 63%,24% 54%,29% 36%,30% 21%,35% 9%,48% 0,64% 0,77% 9%,82% 25%,80% 40%,76% 53%,79% 63%,90% 74%,100% 85%,100% 100%); }
.precise-learning .socratic-scene .socratic-character { clip-path:polygon(0 100%,0 64%,12% 58%,16% 51%,12% 42%,18% 26%,24% 11%,40% 0,62% 0,74% 7%,82% 22%,79% 40%,81% 49%,76% 61%,91% 66%,100% 73%,100% 100%); }
.precise-learning .keyword-definition { padding:13px 17px; }
.precise-learning .keyword-definition .rich-text { line-height:28px; }
.precise-learning.route-socratic .page-header { min-height:55px; }
.precise-learning:not([class*="route-toc"]):not(.route-socratic):not(.route-socratic-live) .page-header { margin-bottom:14px; }
.precise-learning .keyword-stages .stage-tab { font-size:15px; }
.precise-learning .keyword-stages .stage-tab > span { font-size:16px; }
.precise-learning .learning-heading { margin-bottom:15px; }
.precise-learning .keyword-classify-row > strong { font-size:16px; }
.precise-learning .keyword-classify-row button { font-size:13px; }
.precise-learning .keyword-info { font-size:15px; }
.precise-learning .complete-check { display:grid; place-items:center; background:#ebfcf3; color:#00a46c; border-radius:50%; width:54px; height:54px; margin:0 auto 15px; }
html:has(.precise-learning),html:has(.precise-blank) { scrollbar-width:none; }
html:has(.precise-learning)::-webkit-scrollbar,html:has(.precise-blank)::-webkit-scrollbar { display:none; }
.precise-learning .toc-box { max-width:340px; min-height:48px; padding:10px 12px; }
.precise-learning .toc-box strong,.precise-learning .toc-box button,.precise-learning .toc-box input { font-size:20px; }
.precise-learning .toc-tree ul { gap:14px; }
.precise-learning .toc-box.contextual { color:#a1aec5; background:#f7f9fc; border-color:#d9e0ed; }
.precise-learning .toc-box.contextual input::placeholder { color:#bac5d5; }
.precise-learning[class*="route-toc"] { padding-top:0; }
.precise-learning[class*="route-toc"] .page-header { min-height:53px; }
.precise-learning .toc-box { min-height:44px; padding:7px 12px; }
.precise-learning .toc-tree ul { gap:10px; }
.precise-blank { padding-top:9px; }
.precise-blank .page-header { min-height:41px; }
.precise-blank .blank-intro strong { font-size:17px; }
.learning-source-icon { display:inline-block; object-fit:contain; flex:none; vertical-align:middle; mix-blend-mode:multiply; }
.precise-learning .stage-tab > span,.precise-learning .ox-feedback h3 > span { overflow:hidden; }
.precise-learning .stage-tab > span .learning-source-icon { max-width:100%; max-height:100%; border-radius:50%; }
.learning-source-icon { mix-blend-mode:normal; }
.precise-learning .toc-box input { min-width:0; }
.precise-learning.route-toc-copy .toc-copy-mark { position:absolute; right:6px; top:50%; transform:translateY(-50%); font-size:12px; }
.precise-learning.route-toc-copy .toc-box { padding-right:24px; }
@media(max-width:380px) {
 .precise-learning .keyword-stages .stage-tab { font-size:12px; gap:6px; }
 .precise-learning .keyword-stages .stage-tab > span { width:22px; height:22px; font-size:12px; }
 .precise-learning .keyword-classify-row > strong { font-size:15px; }
 .precise-learning .keyword-info { font-size:13px; }
 .precise-learning .keyword-definition .rich-text { font-size:18px; }
}