/* Unified Wrongbook knowledge-map rendering.
   Earth-derived source discipline + Clearnote-informed semantic layouts.
   No artificial workbook pages, no mascot, no numbered blanks/page indexes. */
.v4tb-page-head{align-items:flex-start}.v4tb-layout{margin-top:14px}.v4tb-main{min-width:0}.v4tb-route{display:none}
.v4tb-chapters{display:flex;gap:7px;overflow-x:auto;padding:5px 2px 11px;scrollbar-width:thin;align-items:center}.v4tb-chapter-summary{flex:0 0 auto;font-size:11px;font-weight:800;color:#77756e;padding:0 7px}.v4tb-chapters .mind-chapter-btn{flex:0 0 auto;min-width:180px;border:1px solid #dedee5;background:#fff;border-radius:10px;padding:9px 11px;display:grid;grid-template-columns:1fr auto;gap:8px;align-items:center;text-align:left}.v4tb-chapters .mind-chapter-btn strong{font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.v4tb-chapters .mind-chapter-btn small{font-size:10px;color:#92959e}.v4tb-chapters .mind-chapter-btn.active{border-color:#7b84d9;background:#f7f7ff}
.v4tb-book-stack{display:flex;flex-direction:column;align-items:center;gap:20px;padding:4px 0 18px}.v4tb-sheet{width:min(100%,980px);padding:0!important;overflow:visible!important;background:#fffdf8!important;border:1px solid #d8d3c8!important;border-radius:14px!important;box-shadow:0 12px 34px rgba(59,50,38,.10)!important;position:relative;color:#3f4142}.v4tb-sheet *{box-sizing:border-box}.v4tb-knowledge-map{isolation:isolate}
.v4tb-map-header{min-height:92px;position:relative;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:19px 28px 17px;border-bottom:1px solid #e6e0d5;background:linear-gradient(90deg,color-mix(in srgb,var(--subject) 10%,#fffdf8),#fffdf8 58%);border-radius:14px 14px 0 0}.v4tb-map-header span{font-size:11px;font-weight:800;color:#75736c}.v4tb-map-header h3{margin:4px 0 0;font-size:27px;line-height:1.25;color:#393530}.v4tb-map-progress{flex:0 0 150px;text-align:right}.v4tb-map-progress>span{display:block;font-size:11px;font-weight:850;color:#666b72;margin-bottom:6px}.v4tb-map-progress i{display:block;height:7px;background:#e8e7e2;border-radius:99px;overflow:hidden}.v4tb-map-progress b{display:block;height:100%;border-radius:inherit;background:var(--subject)}
.v4tb-page-body{position:relative;padding:18px 34px 34px;min-height:0}.v4tb-branch{position:relative;margin:10px 0 28px;min-height:190px;padding:42px 12px 20px 32px;background:transparent!important;border:0!important;overflow:visible}.v4tb-branch:before{content:"";position:absolute;left:21px;top:34px;bottom:7px;width:4px;background:var(--branch);border-radius:4px}.v4tb-branch:not(:last-of-type):after{content:"";position:absolute;left:21px;bottom:-31px;height:38px;width:4px;background:linear-gradient(var(--branch),color-mix(in srgb,var(--branch) 50%,#aaa));border-radius:3px}.v4tb-section-ribbon{position:absolute;left:5px;top:0;display:flex;align-items:center;gap:9px;z-index:5}.v4tb-section-ribbon span{display:inline-block;padding:8px 16px 7px;border-radius:9px 9px 9px 2px;background:var(--branch);color:#fff;font-size:16px;font-weight:900;letter-spacing:.02em;box-shadow:0 1px 0 rgba(0,0,0,.08)}.v4tb-section-ribbon small{font-size:10px;color:#777;font-weight:800;background:#fffdf8;padding:2px 5px;border-radius:5px}
.v4tb-reading-cue{display:flex;align-items:flex-start;gap:8px;margin:2px 0 13px;padding:7px 10px;border-radius:8px;background:color-mix(in srgb,var(--branch) 7%,#fff);border:1px solid color-mix(in srgb,var(--branch) 18%,#e7e3da);font-size:10px;line-height:1.45;color:#66645e}.v4tb-reading-cue strong{color:#4a4946;white-space:nowrap}.v4tb-reading-cue span{min-width:0}
.v4tb-flow-body{display:grid;grid-template-columns:minmax(190px,1fr) minmax(240px,300px) minmax(190px,1fr);gap:22px;align-items:center;min-height:230px}.v4tb-flow-points{display:flex;flex-direction:column;gap:8px;min-width:0}.v4tb-flow-before{padding-right:4px}.v4tb-flow-after{padding-left:4px}.v4tb-flow-visual{position:relative;align-self:center;min-width:0}.v4tb-flow-visual .v4-hero-svg{width:100%;height:auto;max-height:220px;display:block}.v4tb-branch.is-shaded{margin-left:-8px;margin-right:-8px;padding-left:40px;padding-right:20px;background:color-mix(in srgb,var(--branch) 7%,#fffdf8)!important;border-radius:10px!important}.v4tb-branch.is-shaded:before{left:29px}
.v4tb-visual-map{position:relative;display:grid;grid-template-columns:minmax(190px,1fr) minmax(250px,330px) minmax(190px,1fr);grid-template-rows:minmax(78px,auto) minmax(210px,auto) minmax(78px,auto);gap:12px 24px;align-items:center;min-height:390px}.v4tb-center-visual{grid-column:2;grid-row:2;align-self:center;position:relative;min-width:0;padding:4px}.v4tb-center-visual .v4-hero-svg{width:100%;height:auto;max-height:250px;display:block}.v4tb-slot{position:relative;min-width:0;max-width:100%}.v4tb-slot-top{grid-column:2;grid-row:1;align-self:end}.v4tb-slot-bottom{grid-column:2;grid-row:3;align-self:start}.v4tb-slot-left{grid-column:1;grid-row:2}.v4tb-slot-right{grid-column:3;grid-row:2}.v4tb-branch-diagram.is-reverse .v4tb-center-visual{transform:scaleX(-1)}.v4tb-branch-diagram.is-reverse .v4tb-center-visual>*{transform:scaleX(-1)}
/* Comparison: parallel cells with one shared visual anchor. */
.v4tb-compare-body{display:grid;grid-template-columns:minmax(190px,250px) 1fr;gap:20px;align-items:start}.v4tb-compare-visual{position:sticky;top:12px;min-width:0;padding:8px 6px}.v4tb-compare-visual .v4-hero-svg{display:block;width:100%;height:auto;max-height:220px}.v4tb-compare-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 14px;min-width:0}.v4tb-compare-cell{min-width:0;border-top:2px solid color-mix(in srgb,var(--branch) 48%,#ded9cf);background:color-mix(in srgb,var(--branch) 3%,#fffdf8);border-radius:7px;padding:2px 5px}
/* Timeline: used only when section semantics genuinely imply sequence. */
.v4tb-timeline-body{display:grid;grid-template-columns:minmax(180px,240px) 1fr;gap:20px;align-items:start}.v4tb-timeline-visual{min-width:0;padding:8px}.v4tb-timeline-visual .v4-hero-svg{display:block;width:100%;height:auto;max-height:210px}.v4tb-timeline-track{position:relative;padding-left:25px;display:flex;flex-direction:column;gap:6px}.v4tb-timeline-track:before{content:"";position:absolute;left:9px;top:11px;bottom:13px;width:3px;border-radius:3px;background:color-mix(in srgb,var(--branch) 72%,#b8b2a7)}.v4tb-timeline-node{position:relative;min-width:0}.v4tb-timeline-node>i{position:absolute;left:-22px;top:17px;width:11px;height:11px;border-radius:50%;background:#fffdf8;border:3px solid var(--branch);z-index:2}
/* Formula: visual representation followed by condition/formula clusters. */
.v4tb-formula-body{display:grid;grid-template-columns:minmax(220px,300px) 1fr;gap:20px;align-items:start}.v4tb-formula-visual{padding:8px;min-width:0}.v4tb-formula-visual .v4-hero-svg{display:block;width:100%;height:auto;max-height:230px}.v4tb-formula-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 12px;min-width:0}.v4tb-recall-formula{background:color-mix(in srgb,var(--branch) 4%,#fff);border-radius:7px;border-left:2px solid color-mix(in srgb,var(--branch) 45%,#cfc9bd);padding-right:7px}
/* Tree: hierarchy/classification without decorative branch spaghetti. */
.v4tb-tree-body{min-width:0}.v4tb-tree-root{width:min(340px,72%);margin:2px auto 14px;padding:6px 12px;border-bottom:2px solid color-mix(in srgb,var(--branch) 58%,#cfc9bd)}.v4tb-tree-root .v4-hero-svg{display:block;width:100%;height:auto;max-height:200px}.v4tb-tree-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px 16px;min-width:0}.v4tb-tree-leaf{min-width:0;background:color-mix(in srgb,var(--branch) 3%,#fffdf8);border-radius:8px;padding:2px 6px}
/* Do not draw short pseudo-connectors between prompt columns and central figures.
   Relationship is conveyed by shared semantic cluster placement. */
.v4tb-recall{position:relative;min-width:0;max-width:100%;padding:8px 4px 8px 18px}.v4tb-recall:before{content:"";position:absolute;left:-9px;top:17px;width:9px;height:9px;border-radius:50%;background:#fffdf8;border:2px solid #585b5e;z-index:3}.v4tb-recall:after{content:"";position:absolute;left:-4px;top:21px;width:18px;height:2px;background:var(--branch);z-index:1}.v4tb-inline-line{position:relative;z-index:2;font-size:13px;line-height:1.75;color:#3f4142;overflow-wrap:anywhere}.v4tb-question{font-weight:700}.v4tb-answer{display:inline-block!important;width:min(calc(var(--answer-chars) * .82em + 28px),100%)!important;min-width:58px!important;max-width:230px!important;height:28px!important;margin:2px 3px!important;padding:1px 4px 0!important;border:0!important;border-bottom:1.8px solid #686b6f!important;border-radius:0!important;background:transparent!important;box-shadow:none!important;outline:none!important;font-size:14px!important;line-height:21px!important;text-align:center!important;color:#34465c;vertical-align:baseline}.v4tb-answer:focus{border-bottom-color:var(--branch)!important;background:color-mix(in srgb,var(--branch) 6%,transparent)!important}.v4tb-recall.is-correct .v4tb-answer{border-bottom-color:#4a9861!important;color:#317045;font-weight:900}.v4tb-recall .mind-status{display:inline!important;margin-left:2px!important;font-size:10px!important;white-space:nowrap}.v4tb-hint-link,.v4tb-related{border:0!important;background:transparent!important;padding:2px 4px!important;font-size:10px!important;font-weight:800!important;color:#8e7654!important;vertical-align:middle}.v4tb-related{color:#567ca3!important}.v4tb-hint{margin:4px 0 0 4px;padding:5px 7px;border-left:2px solid #d1ad56;background:#fff6d9;color:#625a45;font-size:10px;line-height:1.4}.v4tb-truth{margin:4px 0 0 4px;font-size:10px;color:#42734d;line-height:1.4}.v4tb-truth span{margin-right:4px;font-weight:900}.v4tb-recall-diagram{padding-left:14px}.v4tb-recall-diagram:before{left:-8px}.v4tb-recall-diagram:after{left:-3px;width:13px}
.v4tb-end-label{margin:14px 0 0 auto;width:max-content;max-width:100%;padding:8px 13px;border-radius:8px;background:#79a84f;color:#fff;display:flex;gap:9px;align-items:center}.v4tb-end-label span{font-size:10px;font-weight:700}.v4tb-end-label strong{font-size:14px}.v4tb-sheet-footer{width:min(100%,980px);margin:0 auto;display:grid;grid-template-columns:auto 1fr auto;gap:12px;align-items:center}.v4tb-sheet-footer>span{text-align:center;font-size:11px;color:#777}
/* Hard-removal guards for legacy forbidden artifacts. */
.v4tb-mascot,.v4tb-page-number,.v4tb-page-carry,.v4tb-continuation,.v4tb-blank-no,.v4tb-book-badge,.v4tb-paper-strip{display:none!important}
@media(max-width:980px){.v4tb-sheet{width:100%}.v4tb-flow-body{grid-template-columns:minmax(170px,1fr) minmax(210px,260px) minmax(170px,1fr);gap:18px}.v4tb-visual-map{grid-template-columns:minmax(165px,1fr) minmax(220px,280px) minmax(165px,1fr);gap:10px 20px}.v4tb-compare-body,.v4tb-timeline-body,.v4tb-formula-body{grid-template-columns:minmax(170px,220px) 1fr;gap:16px}.v4tb-page-body{padding-left:26px;padding-right:26px}}
@media(max-width:720px){.v4tb-page-head p{display:none}.v4tb-chapters .mind-chapter-btn{min-width:160px}.v4tb-book-stack{gap:14px}.v4tb-map-header{min-height:78px;padding:15px 16px;gap:14px}.v4tb-map-header h3{font-size:21px}.v4tb-map-progress{flex-basis:100px}.v4tb-page-body{padding:12px 14px 28px}.v4tb-branch{padding:38px 2px 14px 24px;margin-bottom:20px}.v4tb-branch:before{left:16px}.v4tb-branch:not(:last-of-type):after{left:16px;bottom:-23px;height:30px}.v4tb-section-ribbon{left:0}.v4tb-section-ribbon span{font-size:14px;padding:7px 12px}.v4tb-reading-cue{display:block;font-size:10px}.v4tb-reading-cue strong{display:block;margin-bottom:2px}.v4tb-flow-body,.v4tb-compare-body,.v4tb-timeline-body,.v4tb-formula-body{display:block}.v4tb-flow-visual,.v4tb-compare-visual,.v4tb-timeline-visual,.v4tb-formula-visual{position:relative;top:auto;width:min(78vw,300px);margin:12px auto}.v4tb-flow-before,.v4tb-flow-after{padding:0}.v4tb-visual-map{display:flex;flex-direction:column;min-height:0;gap:6px}.v4tb-center-visual{order:-1;width:min(80vw,310px);margin:8px auto}.v4tb-slot{width:100%}.v4tb-compare-grid,.v4tb-formula-grid,.v4tb-tree-grid{grid-template-columns:1fr;gap:5px}.v4tb-tree-root{width:min(82vw,300px)}.v4tb-timeline-track{padding-left:22px}.v4tb-recall{padding-left:15px}.v4tb-recall:before{left:-7px}.v4tb-recall:after{left:-2px;width:14px}.v4tb-inline-line{font-size:12px;line-height:1.7}.v4tb-answer{font-size:13px!important;max-width:min(230px,78vw)!important}.v4tb-sheet-footer{padding:0 4px}.v4tb-end-label{margin-right:0}.v4tb-branch.is-shaded{margin-left:0;margin-right:0;padding-left:24px;padding-right:4px}.v4tb-branch.is-shaded:before{left:16px}}
@media(max-width:420px){.v4tb-map-header{display:block}.v4tb-map-progress{margin-top:10px;width:120px;text-align:left}.v4tb-chapters .mind-chapter-btn{min-width:150px}.v4tb-page-body{padding-left:10px;padding-right:10px}.v4tb-branch{padding-left:22px}.v4tb-section-ribbon small{display:none}.v4tb-inline-line{font-size:12px}.v4tb-answer{width:min(calc(var(--answer-chars) * .78em + 24px),72vw)!important;min-width:54px!important}.v4tb-sheet-footer{grid-template-columns:1fr 1fr}.v4tb-sheet-footer>span{grid-column:1/-1;grid-row:1}.v4tb-sheet-footer button{font-size:11px}}