/* ══════════════════════════════════════════════════════════════════════════════
   knowledge.css — styles for knowledge-fx.js (concise view, Learn panel,
   interactive visuals). Uses the Clinical Blue tokens from shapes-skin.css
   (--surface, --text, --accent …) so light and dark mode come for free.
   ══════════════════════════════════════════════════════════════════════════════ */

/* ── 1 · Concise view ─────────────────────────────────────────────────────── */
.kn-brief:not(.kn-dg) > :nth-child(n+3):not(.kn-more):not(.ks):not(.vt-refs),
.kn-brief.kn-dg > :nth-child(n+4):not(.kn-more):not(.ks):not(.vt-refs){display:none!important}
.kn-brief > ul.facts > li:nth-child(n+5){display:none!important}
/* clamp to two lines; the bottom padding becomes a transparent border so the
   clipped third line can't peek through it (overflow clips at the padding box) */
.kn-brief > ul.facts > li{display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;overflow:hidden;
  padding-bottom:0!important;border-bottom:.72rem solid transparent!important;box-shadow:0 1px 0 var(--border2,#C6D1DD)}
.kn-brief table tr:nth-child(n+7){display:none}
.kn-brief .cn{display:none}

.kn-digest{display:flex;flex-wrap:wrap;align-items:center;gap:.4rem;margin:.1rem 0 .9rem}
.kn-digest-lab{font-size:.66rem;font-weight:800;letter-spacing:.16em;text-transform:uppercase;color:var(--text3,#6F7D90);margin-right:.2rem}
.kn-chip{font:inherit;font-size:.78rem;font-weight:600;line-height:1.2;padding:.34rem .7rem;border-radius:999px;cursor:pointer;
  color:var(--accent);background:color-mix(in srgb,var(--accent) 10%,var(--surface));border:1px solid color-mix(in srgb,var(--accent) 28%,transparent);
  transition:background .2s,transform .2s}
.kn-chip:hover{background:color-mix(in srgb,var(--accent) 18%,var(--surface));transform:translateY(-1px)}
/* Phone: the chapter filter chips measured 28px tall, under a comfortable
   thumb target, and they are the main way into a chapter. */
@media (max-width:600px){
  .kn-chip{min-height:40px;padding:.6rem .85rem;display:inline-flex;align-items:center}
}
.kn-flash{animation:kn-flash 1.4s ease}
@keyframes kn-flash{0%,40%{box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 45%,transparent)}100%{box-shadow:0 0 0 0 transparent}}

.kn-more{position:relative;display:flex;align-items:center;justify-content:center;gap:.5rem;width:100%;margin:.9rem 0 .1rem;padding:.62rem 1rem;
  font:inherit;font-size:.84rem;font-weight:700;color:var(--accent);cursor:pointer;border-radius:12px;
  background:color-mix(in srgb,var(--accent) 7%,var(--surface));border:1px dashed color-mix(in srgb,var(--accent) 40%,transparent);transition:background .2s}
.kn-more:hover{background:color-mix(in srgb,var(--accent) 14%,var(--surface))}
.kn-brief > .kn-more::before{content:"";position:absolute;left:0;right:0;bottom:100%;height:46px;pointer-events:none;
  background:linear-gradient(to bottom,transparent,color-mix(in srgb,var(--surface) 88%,transparent))}
.kn-more-n{font-size:.72rem;font-weight:800;padding:.1rem .45rem;border-radius:999px;background:color-mix(in srgb,var(--accent) 16%,transparent)}
.kn-more-n:empty{display:none}
.kn-more-i{transition:transform .3s}
.kn-more[aria-expanded="true"] .kn-more-i{transform:rotate(180deg)}
.kn-more[aria-expanded="true"] .kn-more-n{display:none}

/* ── 2 · Learn panel ──────────────────────────────────────────────────────── */
.kn-learn{margin:1.2rem 0 1.6rem;padding:1.1rem 1.2rem 1.25rem;border-radius:18px;
  background:linear-gradient(160deg,color-mix(in srgb,var(--accent) 9%,var(--surface)),var(--surface) 60%);
  border:1px solid color-mix(in srgb,var(--accent) 22%,var(--border,#DCE3EB));
  box-shadow:0 10px 30px -18px color-mix(in srgb,var(--accent) 60%,transparent)}
/* ONE type scale for the whole panel. It used to run 11.84 / 12.16 / 12.48 /
   13.44 / 17.92px across five rules, none of which matched the page's own
   14.88px body — which is what made the block read as a different design
   pasted into the chapter. */
.kn-lhead{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap}
.kn-ltitle{font-family:var(--font-heading,inherit);font-size:1.05rem;font-weight:600;
  line-height:1.3;color:var(--text)}
.kn-lsub{font-size:.93rem;line-height:1.6;color:var(--text2);margin-top:.2rem}
.kn-prog{display:flex;align-items:center;gap:.7rem;margin:.85rem 0 .8rem}
.kn-prog-bar{flex:1;height:6px;border-radius:99px;background:color-mix(in srgb,var(--accent) 14%,transparent);overflow:hidden}
.kn-prog-fill{display:block;height:100%;background:linear-gradient(90deg,var(--accent),var(--accent2,#8E1F2A));transform-origin:0 50%;transform:scaleX(0);transition:transform .6s cubic-bezier(.2,.8,.2,1)}
.kn-prog-t{font-size:.93rem;line-height:1.6;font-weight:700;color:var(--text3);white-space:nowrap}

/* Equal columns, not content widths. As a flex row with wrap the four tabs
   came out 76 / 74 / 74 / 105px and the fourth dropped to its own line on a
   phone, which is what made the row look misaligned. */
.kn-tabs{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:.3rem;
  margin-bottom:.9rem;border-bottom:1px solid var(--border,#DCE3EB);padding-bottom:.55rem}
.kn-tab{font:inherit;font-size:.93rem;line-height:1.35;font-weight:700;color:var(--text2);
  background:none;border:0;padding:.5rem .3rem;border-radius:10px;cursor:pointer;
  transition:background .2s,color .2s;min-height:40px;
  display:flex;align-items:center;justify-content:center;gap:.3rem;text-align:center}
.kn-tab>span[aria-hidden]{font-size:.9em;line-height:1}
.kn-tab:hover{background:color-mix(in srgb,var(--accent) 8%,transparent);color:var(--text)}
.kn-tab[aria-selected="true"]{background:var(--accent);color:var(--surface)}
.kn-pane{min-height:120px}

/* Every block inside a pane shares one column, so the slider, the drawing,
   the proportion bar and the legend all start and end on the same edges. */
.kn-pane>*{max-width:620px;margin-left:auto;margin-right:auto}
.kn-pane .kv{width:100%}
.kn-tab:focus-visible,.kn-chip:focus-visible,.kn-more:focus-visible,.kv button:focus-visible,.kv-site:focus-visible,.kv-el:focus-visible,.kn-card:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* segmented control (reading mode + widget toggles) */
.kv-seg{display:inline-flex;flex-wrap:wrap;gap:3px;padding:3px;border-radius:12px;background:color-mix(in srgb,var(--accent) 10%,var(--surface2,#EEF2F7))}
.kv-seg button{font:inherit;font-size:.82rem;font-weight:700;color:var(--text2);background:none;border:0;border-radius:9px;padding:.36rem .7rem;cursor:pointer;transition:background .2s,color .2s}
.kv-seg button[aria-pressed="true"]{background:var(--surface);color:var(--accent);box-shadow:0 1px 4px rgba(10,22,38,.14)}

/* flip cards */
.kn-fc{display:flex;flex-direction:column;align-items:center;gap:.7rem}
.kn-card{position:relative;width:min(520px,100%);height:210px;border:0;padding:0;background:none;cursor:pointer;perspective:1100px;font:inherit}
.kn-face{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;text-align:center;padding:1.2rem 1.4rem;border-radius:16px;
  backface-visibility:hidden;-webkit-backface-visibility:hidden;transition:transform .55s cubic-bezier(.3,.7,.2,1);line-height:1.5}
.kn-front{background:linear-gradient(145deg,var(--accent),color-mix(in srgb,var(--accent) 60%,var(--accent2,#8E1F2A)));color:#fff;font-size:1.15;font-weight:800}
.kn-back{background:var(--surface);color:var(--text);font-size:.93rem;border:1px solid var(--border2,#C6D1DD);transform:rotateY(180deg)}
.kn-card.flip .kn-front{transform:rotateY(-180deg)}
.kn-card.flip .kn-back{transform:rotateY(0)}
.kn-fc-bar{display:flex;align-items:center;gap:.5rem;flex-wrap:wrap;justify-content:center}
.kn-fc-n{font-size:.82rem;font-weight:700;color:var(--text3);min-width:9rem;text-align:center}
.kn-got.on{background:var(--green,#2E7D5B);color:#fff;border-color:transparent}

/* quick check + scenarios */
.kv-tagline{font-size:.78rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--text3);margin-bottom:.35rem}
.kv-scq{font-size:.93rem;font-weight:600;color:var(--text);margin:0 0 .75rem;line-height:1.5}
.kv-opts{display:grid;gap:.45rem}
.kv-opts button{font:inherit;font-size:.93rem;text-align:left;padding:.65rem .85rem;border-radius:12px;cursor:pointer;color:var(--text);
  background:var(--surface);border:1px solid var(--border2,#C6D1DD);transition:border-color .2s,background .2s,opacity .2s}
.kv-opts button:hover:not(:disabled){border-color:var(--accent)}
.kv-opts button.right{border-color:var(--green);background:color-mix(in srgb,var(--green) 14%,var(--surface))}
.kv-opts button.wrong{border-color:var(--red);background:color-mix(in srgb,var(--red) 12%,var(--surface))}
.kv-opts button.dim{opacity:.55}
.kv-opts button:disabled{cursor:default}
.kv-next{display:flex;align-items:center;gap:.8rem;margin-top:.7rem;font-size:.88rem;color:var(--text2)}
.kn-qc-done{text-align:center;padding:.6rem 0}
.kn-qc-score{font-size:2.2;font-weight:900;color:var(--accent)}
.kn-qc-act{display:flex;gap:.5rem;justify-content:center;flex-wrap:wrap;margin-top:.5rem}
.kv-btn{font:inherit;font-size:.88rem;font-weight:700;padding:.5rem .95rem;border-radius:10px;cursor:pointer;color:var(--text);
  background:var(--surface);border:1px solid var(--border2,#C6D1DD);transition:background .2s,border-color .2s}
.kv-btn:hover{border-color:var(--accent)}
.kv-btn.primary{background:var(--accent);color:var(--surface);border-color:transparent}

/* chapter map */
.kn-map{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:.45rem}
.kn-map-i{display:flex;align-items:center;gap:.6rem;width:100%;font:inherit;font-size:.93rem;text-align:left;padding:.6rem .75rem;border-radius:12px;cursor:pointer;
  color:var(--text);background:var(--surface);border:1px solid var(--border,#DCE3EB);transition:border-color .2s,background .2s}
.kn-map-i:hover{border-color:var(--accent)}
.kn-map-c{flex:none;width:18px;height:18px;border-radius:50%;border:2px solid color-mix(in srgb,var(--accent) 45%,transparent);position:relative}
.kn-map-i.done{background:color-mix(in srgb,var(--green) 9%,var(--surface))}
.kn-map-i.done .kn-map-c{background:var(--green);border-color:var(--green)}
.kn-map-i.done .kn-map-c::after{content:"";position:absolute;left:4px;top:1px;width:5px;height:9px;border:solid #fff;border-width:0 2px 2px 0;transform:rotate(45deg)}

/* ── 3 · Interactive visuals ─────────────────────────────────────────────── */
.kv{--c0:#C8453E;--c1:#E0A53A;--c2:#2F6DB5;font-size:.93rem;line-height:1.6;color:var(--text)}
body.dark .kv{--c0:#E0575F;--c1:#E0B36A;--c2:#8DB6E2}
.kv input[type=range]{width:100%;accent-color:var(--accent);margin:.35rem 0 .6rem}
.kv-q{display:block;font-weight:700;color:var(--text);margin-bottom:.1rem}
.kv-q b,.kv label b{color:var(--accent);font-weight:800;margin-left:.25rem}
.kv-q2{margin-top:1rem}
.kv-note{font-size:.82rem;color:var(--text3);margin:.8rem 0 0;line-height:1.5}
.kv-callout{margin-top:.7rem;padding:.65rem .85rem;border-radius:12px;font-size:.93rem;line-height:1.5;color:var(--text);
  background:color-mix(in srgb,var(--accent) 8%,var(--surface));border-left:3px solid var(--accent)}
.kv-callout[hidden]{display:none}
/* Width drives the size, not a pixel height. max-height in px fought
   width:100%, so preserveAspectRatio scaled the drawing to the shorter
   axis and left it floating in the middle of a mostly empty box. */
.kv-svg{display:block;width:100%;height:auto;overflow:visible}
.kv-svg text{font-size:10px;fill:var(--text2);font-family:inherit}
.kv-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);gap:1.1rem;align-items:center}
.kv-side{min-width:0}
.kv-grid2{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
@media (max-width:640px){.kv-row,.kv-grid2{grid-template-columns:1fr}}

/* 1 energy */
.kv-a0{fill:var(--c0);opacity:.85}.kv-a1{fill:var(--c1);opacity:.85}.kv-a2{fill:var(--c2);opacity:.85}
.kv-cursor{stroke:var(--text);stroke-width:2;stroke-dasharray:3 3}
.kv-stack{display:flex;height:16px;border-radius:99px;overflow:hidden;margin:.7rem 0 .45rem}
.kv-stack i{display:block;flex-basis:0;transition:flex-grow .25s}
.kv-s0,.kv-c0{background:var(--c0)}.kv-s1,.kv-c1{background:var(--c1)}.kv-s2,.kv-c2{background:var(--c2)}
.kv-legend{display:flex;flex-wrap:wrap;gap:.4rem 1.1rem;font-size:.88rem;color:var(--text2)}
.kv-legend b{color:var(--text)}
.kv-dot{display:inline-block;width:10px;height:10px;border-radius:50%;margin-right:.35rem;vertical-align:-1px}

/* 2 nerve */
.kv-nerve{max-height:240px}
.kv-path{fill:none;stroke:color-mix(in srgb,var(--accent) 45%,transparent);stroke-width:5;stroke-linecap:round}
.kv-site{cursor:pointer;outline:none}
.kv-site ellipse,.kv-site rect,.kv-site circle{fill:var(--surface);stroke:var(--accent);stroke-width:2;transition:fill .2s}
.kv-site text{text-anchor:middle;font-weight:700;fill:var(--text)}
.kv-site:hover ellipse,.kv-site:hover rect,.kv-site:hover circle{fill:color-mix(in srgb,var(--accent) 16%,var(--surface))}
.kv-site.on ellipse,.kv-site.on rect,.kv-site.on circle{fill:var(--red);stroke:var(--red)}
.kv-site.on text{fill:#fff}
.kv-site.on:nth-of-type(n+3) text{fill:var(--text)}
.kv-muscle{fill:color-mix(in srgb,var(--red) 45%,var(--surface))}
.kv-signs table{width:100%;border-collapse:collapse;font-size:.88rem}
.kv-signs th,.kv-signs td{padding:.38rem .5rem;border-bottom:1px solid var(--border,#DCE3EB);text-align:left;vertical-align:top}
.kv-signs thead th{font-size:.78rem;letter-spacing:.1em}
.kv-signs td{transition:background .25s,opacity .25s;opacity:.45}
.kv-signs[data-k=u] .kv-u,.kv-signs[data-k=l] .kv-l{opacity:1;background:color-mix(in srgb,var(--accent) 11%,transparent);font-weight:600}
.kv-signs[data-k=u] .kv-uh,.kv-signs[data-k=l] .kv-lh{color:var(--accent)}
.kv-tag{font-weight:700;font-size:.88rem;margin-bottom:.4rem;color:var(--text)}

/* 3 zones */
.kv-zones{display:grid;gap:.35rem;margin-top:.4rem}
.kv-zone{display:grid;grid-template-columns:2.6rem 1fr auto;align-items:center;gap:.6rem;padding:.5rem .75rem;border-radius:12px;color:#fff}
.kv-zone small{display:block;font-size:.78rem;opacity:.85;font-weight:500}
.kv-zn{font-weight:900}
.kv-zl{font-weight:700;line-height:1.2}
.kv-zone b{font-size:.93rem;font-variant-numeric:tabular-nums}
.kv-z1{background:#5E8FB8}.kv-z2{background:#3E8E5E}.kv-z3{background:#C9A23A}.kv-z4{background:#D9772E}.kv-z5{background:#C8453E}

/* 4 skin */
.kv-epi{fill:#E9C3A6}.kv-der{fill:#E3A89A}.kv-hyp{fill:#F2DFA6}
body.dark .kv-epi{fill:#B8927A}body.dark .kv-der{fill:#A9766B}body.dark .kv-hyp{fill:#B8A574}
.kv-hair{stroke:#5A4230;stroke-width:2}.kv-fol{fill:#C98A7C}.kv-fat{fill:#EAD08A}
.kv-burn{fill:rgba(120,20,20,.55);stroke:#7A1822;stroke-width:1.5;transition:height .35s cubic-bezier(.3,.7,.2,1)}
.kv-skin text{fill:#3A2A20;font-weight:700}
.kv-side .kv-seg{display:flex;flex-direction:column}
.kv-side .kv-seg button{text-align:left}

/* 5 supercompensation */
.kv-base{stroke:var(--text3);stroke-dasharray:4 4}
.kv-curve{fill:none;stroke:var(--accent);stroke-width:3;stroke-linejoin:round}
.kv-ticks circle{fill:var(--red)}
.kv-verdict{margin-top:.5rem;font-weight:800;padding:.5rem .8rem;border-radius:10px}
.kv-verdict.good{color:var(--green);background:color-mix(in srgb,var(--green) 12%,transparent)}
.kv-verdict.bad{color:var(--red);background:color-mix(in srgb,var(--red) 12%,transparent)}
.kv-verdict.meh{color:var(--amber);background:color-mix(in srgb,var(--amber) 14%,transparent)}

/* 6 healing */
.kv-tl{position:relative;height:96px;margin-top:.4rem;border-radius:12px;background:color-mix(in srgb,var(--accent) 6%,transparent)}
.kv-ph{position:absolute;height:24px;border-radius:8px;display:flex;align-items:center;padding:0 .5rem;font-size:.78rem;font-weight:700;color:#fff;white-space:nowrap;overflow:hidden;opacity:.45;transition:opacity .25s}
.kv-ph span{overflow:hidden;text-overflow:ellipsis}
.kv-ph.on{opacity:1}
.kv-ph-i{top:8px;background:#C8453E}.kv-ph-p{top:36px;background:#D9772E}.kv-ph-r{top:64px;background:#2F6DB5}
.kv-now{position:absolute;top:-4px;bottom:-4px;width:3px;margin-left:-1.5px;border-radius:2px;background:var(--text)}
.kv-tlx{display:flex;justify-content:space-between;font-size:.78rem;color:var(--text3);margin-top:.25rem}
.kv-tlx span:nth-child(2){margin-left:18%}.kv-tlx span:nth-child(3){margin-left:auto;margin-right:18%}
.kv-meter{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:.7rem;margin-top:.7rem;font-size:.88rem;color:var(--text2)}
.kv-bar{height:10px;border-radius:99px;background:color-mix(in srgb,var(--accent) 12%,transparent);overflow:hidden}
.kv-bar i{display:block;height:100%;background:var(--green);transform-origin:0 50%;transition:transform .3s}
.kv-meter b{color:var(--text);font-variant-numeric:tabular-nums}
.kv-risk[data-lv=mid] .kv-bar i{background:var(--amber)}.kv-risk[data-lv=hi] .kv-bar i{background:var(--red)}

/* 7 / 9 tool buttons */
.kv-tools{display:flex;flex-wrap:wrap;gap:.4rem;margin-top:.4rem}
.kv-tools button{display:flex;align-items:center;gap:.5rem;font:inherit;font-size:.88rem;font-weight:700;padding:.45rem .7rem;border-radius:10px;cursor:pointer;
  color:var(--text);background:var(--surface);border:1px solid var(--border2,#C6D1DD);transition:border-color .2s,background .2s}
.kv-tools button:hover{border-color:var(--accent)}
.kv-tools button.on{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 12%,var(--surface))}
.kv-stars{font-style:normal;font-size:.78rem;letter-spacing:1px;color:var(--accent)}
.kv-stars em{font-style:normal;opacity:.22}

/* 8 fuel */
.kv-fuel{display:grid;gap:.5rem;margin-top:.8rem}
.kv-frow{display:grid;grid-template-columns:7.5rem 1fr 6.5rem;align-items:center;gap:.6rem;font-size:.88rem}
.kv-frow b{text-align:right;font-variant-numeric:tabular-nums}
.kv-fbar{position:relative;height:14px;border-radius:99px;background:color-mix(in srgb,var(--accent) 10%,transparent)}
.kv-fbar i{position:absolute;top:0;bottom:0;border-radius:99px;transition:left .3s,width .3s}
.kv-carb .kv-fbar i{background:var(--c1)}.kv-pro .kv-fbar i{background:var(--c0)}
.kv .kv-seg + .kv-fuel{margin-top:.7rem}

/* 9 pyramid */
.kv-pyr{display:flex;flex-direction:column;align-items:center;gap:4px}
.kv-lv{width:var(--w);min-height:34px;display:flex;align-items:center;justify-content:center;text-align:center;padding:.3rem .5rem;font-size:.82rem;font-weight:700;
  color:var(--text);background:color-mix(in srgb,var(--accent) 12%,var(--surface));clip-path:polygon(6% 0,94% 0,100% 100%,0 100%);transition:background .25s,color .25s}
.kv-lv.on{background:var(--accent);color:var(--surface)}
.kv-grade{font-style:normal;font-size:.78rem;font-weight:900;padding:.05rem .4rem;border-radius:6px;color:#fff}
.kv-gA{background:var(--green)}.kv-gB{background:var(--amber)}.kv-gC{background:#8A6A3A}.kv-gx{background:var(--red)}

/* 11 / 14 paths */
.kv-path{list-style:none;margin:.7rem 0 0;padding:0;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:.4rem;counter-reset:none}
.kv-path li{position:relative}
.kv-path li:not(:last-child)::after{content:"";position:absolute;top:22px;right:-.4rem;width:.4rem;height:2px;background:color-mix(in srgb,var(--accent) 40%,transparent)}
.kv-path button{display:flex;flex-direction:column;align-items:center;gap:.3rem;width:100%;height:100%;font:inherit;font-size:.82rem;font-weight:700;text-align:center;
  padding:.55rem .35rem;border-radius:12px;cursor:pointer;color:var(--text);background:var(--surface);border:1px solid var(--border2,#C6D1DD);transition:border-color .2s,background .2s}
.kv-path button b{display:flex;align-items:center;justify-content:center;width:26px;height:26px;border-radius:50%;background:color-mix(in srgb,var(--accent) 14%,transparent);color:var(--accent)}
.kv-path button[aria-pressed="true"]{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 11%,var(--surface))}
.kv-path button[aria-pressed="true"] b{background:var(--accent);color:var(--surface)}
@media (max-width:640px){.kv-path{grid-template-columns:1fr}.kv-path li::after{display:none}.kv-path button{flex-direction:row;justify-content:flex-start}}

/* 12 goniometer */
.kv-gon .kv-seg1,.kv-gon .kv-seg2{stroke:var(--accent);stroke-width:9;stroke-linecap:round}
.kv-gon .kv-seg1{stroke:color-mix(in srgb,var(--accent) 45%,var(--surface))}
.kv-arc{fill:none;stroke:var(--red);stroke-width:3}
.kv-axis{fill:var(--surface);stroke:var(--text);stroke-width:2}
.kv-deg{font-size:16px!important;font-weight:900;fill:var(--text)!important}
.kv .kv-seg{margin-bottom:.6rem}
.kv-mmt{display:flex;gap:.35rem;margin-top:.4rem}
.kv-mmt button{width:40px;height:40px;border-radius:50%;font:inherit;font-weight:900;cursor:pointer;color:var(--text);background:var(--surface);border:1px solid var(--border2,#C6D1DD)}
.kv-mmt button.on{background:var(--accent);color:var(--surface);border-color:transparent}

/* 13 five phases */
.kv-wx{max-height:250px}
.kv-wx marker path{fill:var(--text3)}
.kv-gen,.kv-ctl{stroke:var(--text3);stroke-width:2;transition:opacity .3s}
.kv-ctl{stroke-dasharray:5 4}
.kv-wx[data-c=gen] .kv-ctls,.kv-wx[data-c=ctl] .kv-gens{opacity:0}
.kv-el{cursor:pointer;outline:none}
.kv-el circle{fill:var(--c);stroke:var(--surface);stroke-width:3;transition:transform .25s;transform-box:fill-box;transform-origin:center}
.kv-el text{text-anchor:middle;font-size:12px!important;font-weight:900;fill:#fff!important}
.kv-el.on circle{transform:scale(1.14);stroke:var(--text)}
.kv-el-out b{font-size:1.15}
.kv-el-out dl{display:grid;grid-template-columns:auto 1fr;gap:.25rem .8rem;margin:.5rem 0 0;font-size:.93rem}
.kv-el-out dt{color:var(--text3);font-weight:700}
.kv-el-out dd{margin:0;color:var(--text)}

/* 14 CPR */
.kv-cpr{display:flex;align-items:center;gap:1.3rem;flex-wrap:wrap}
.kv-heart{display:flex;flex-direction:column;align-items:center;justify-content:center;width:132px;height:132px;border-radius:50%;cursor:pointer;font:inherit;font-weight:800;font-size:.82rem;
  color:#fff;background:radial-gradient(circle at 40% 35%,#E0575F,#8E1F2A);border:0;box-shadow:0 12px 26px -10px rgba(142,31,42,.7)}
.kv-heart-i{font-size:2.2;line-height:1}
.kv-heart.kv-pulse{animation:kv-pulse .32s cubic-bezier(.3,.7,.2,1)}
@keyframes kv-pulse{0%{transform:scale(.9)}100%{transform:scale(1)}}
.kv-count{font-size:.93rem;color:var(--text3)}
.kv-count b{font-size:2.2;font-weight:900;color:var(--text);font-variant-numeric:tabular-nums;margin-right:.2rem}
.kv-cue{font-weight:800;color:var(--accent);min-height:1.4em}
.kv-snd{font-size:.88rem;color:var(--text2);display:flex;align-items:center;gap:.35rem;margin-top:.3rem}
.kv-chain{margin-top:1rem}

@media (prefers-reduced-motion:reduce){
  .kn-face,.kv-stack i,.kv-burn,.kv-bar i,.kv-fbar i,.kn-prog-fill{transition:none}
  .kv-heart.kv-pulse,.kn-flash{animation:none}
}


/* ── 4 · Knowledge Hub (toc.html) ─────────────────────────────────────────── */
.kh-paths{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1rem;max-width:1080px;margin:1.2rem auto 0}
@media (max-width:980px){.kh-paths{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:560px){.kh-paths{grid-template-columns:1fr}}
.kh-path{--k:var(--accent);position:relative;display:flex;flex-direction:column;gap:.45rem;padding:1.2rem 1.15rem 1.1rem;border-radius:18px;overflow:hidden;
  background:linear-gradient(165deg,color-mix(in srgb,var(--k) 14%,var(--surface)),var(--surface) 70%);border:1px solid color-mix(in srgb,var(--k) 28%,var(--border,#DCE3EB))}
.kh-practice{--k:var(--green)}.kh-prepare{--k:var(--accent2,#8E1F2A)}.kh-explore{--k:var(--amber)}
.kh-ico{width:46px;height:46px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:1.45rem;
  background:color-mix(in srgb,var(--k) 18%,var(--surface));box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--k) 30%,transparent)}
.kh-path h3{margin:.2rem 0 0;font-size:1.15rem;color:var(--text)}
.kh-path p{margin:0;font-size:.86rem;line-height:1.5;color:var(--text2);flex:1}
.kh-links{display:flex;flex-wrap:wrap;gap:.35rem;margin-top:.4rem}
.kh-links a{font-size:.78rem;font-weight:700;padding:.32rem .62rem;border-radius:999px;text-decoration:none;color:var(--k);
  background:color-mix(in srgb,var(--k) 11%,var(--surface));border:1px solid color-mix(in srgb,var(--k) 30%,transparent);transition:background .2s}
.kh-links a:hover{background:color-mix(in srgb,var(--k) 20%,var(--surface))}
body.dark .kh-practice .kh-links a,body.dark .kh-prepare .kh-links a,body.dark .kh-explore .kh-links a{color:color-mix(in srgb,var(--k) 70%,#fff)}
.kh-tracks{margin:1rem auto 0;justify-content:center;display:flex;width:max-content;max-width:100%}
.ch-card.kh-hide{display:none!important}
.ch-num{position:relative;overflow:visible!important}
.kh-ring{position:absolute;inset:-7px;pointer-events:none}
.kh-ring svg{width:100%;height:100%;transform:rotate(-90deg)}
.kh-ring circle{fill:none;stroke-width:3.5}
.kh-ring-bg{stroke:color-mix(in srgb,var(--accent) 16%,transparent)}
.kh-ring-fg{stroke:var(--green);stroke-linecap:round;transition:stroke-dashoffset .8s cubic-bezier(.2,.8,.2,1)}
.kh-done .ch-go::after{content:" ✓";color:var(--green)}
a.kh-continue{text-decoration:none;display:inline-flex;align-items:center}

/* ── restored after efb7c11 (a stale copy dropped these): practice trays + Sources ── */
/* ── 7b · Practise every part (.ks) ─────────────────────────────────────────── */
.ks{margin:1.1rem 0 .2rem;padding-top:.85rem;border-top:1px dashed color-mix(in srgb,var(--accent) 30%,transparent)}
.ks-bar{display:flex;align-items:center;gap:.6rem .8rem;flex-wrap:wrap}
.ks-lab{display:inline-flex;align-items:center;gap:.4rem;font-size:.7rem;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:var(--text3)}
.ks-lab-i{font-size:1rem;animation:ks-bob 3.2s ease-in-out infinite}
.ks-count{font-size:.68rem;letter-spacing:.04em;padding:.08rem .45rem;border-radius:999px;background:color-mix(in srgb,var(--green) 16%,transparent);color:var(--green)}
.ks-count:empty{display:none}
.ks-tabs{display:flex;flex-wrap:wrap;gap:.4rem}
.ks-tab{position:relative;font:inherit;font-size:.78rem;font-weight:700;color:var(--text2);padding:.4rem .75rem;border-radius:999px;cursor:pointer;
  background:var(--surface);border:1px solid var(--border2,#C6D1DD);transition:transform .25s,background .2s,color .2s}
.ks-tab:hover{color:var(--text)}
.ks-tab.on{color:var(--accent)}
.ks-tab.did::after{content:"✓";position:absolute;top:-5px;right:-4px;width:15px;height:15px;border-radius:50%;font-size:.6rem;line-height:15px;text-align:center;
  background:var(--green);color:#fff;box-shadow:0 2px 6px color-mix(in srgb,var(--green) 50%,transparent);animation:ks-pop .4s cubic-bezier(.3,1.6,.5,1)}
.ks-stage{margin-top:.8rem;padding:1rem;border-radius:18px;background:var(--surface2,color-mix(in srgb,var(--accent) 5%,var(--surface)))}
.ks-stage.ks-in{animation:ks-rise .45s cubic-bezier(.2,.8,.2,1)}
.ks-hint{margin:0 0 .7rem;font-size:.84rem;color:var(--text2)}
.ks-btn{font:inherit;font-size:.84rem;font-weight:700;padding:.5rem .95rem;border-radius:999px;cursor:pointer;color:var(--text);background:var(--surface);border:1px solid var(--border2,#C6D1DD)}
.ks-btn.primary{background:var(--accent);color:#fff;border-color:transparent}
.ks-btn:disabled{opacity:.55;cursor:default}
.ks-end{display:flex;align-items:center;gap:.7rem;flex-wrap:wrap;margin-top:.9rem;padding:.7rem .9rem;border-radius:14px;
  background:color-mix(in srgb,var(--green) 13%,var(--surface));animation:ks-rise .5s cubic-bezier(.2,.8,.2,1)}
.ks-end b{color:var(--text)}
.ks-burst{font-size:1.2rem;color:var(--green);animation:ks-spin 1.2s cubic-bezier(.2,.8,.2,1)}

/* concept web */
.ks-web{position:relative;aspect-ratio:16/9;min-height:280px;max-height:420px;width:100%}
.ks-web-lines{position:absolute;inset:0;width:100%;height:100%;overflow:visible;animation:ks-draw .9s .15s both}
.ks-web-lines line{stroke:color-mix(in srgb,var(--accent) 35%,transparent);stroke-width:.45;stroke-dasharray:1.2 1.4;stroke-linecap:round}
.ks-web-lines line.seen{stroke:var(--green);stroke-dasharray:none}
.ks-web-hub{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:26%;min-width:110px;aspect-ratio:1;border-radius:50%;display:flex;align-items:center;justify-content:center;
  padding:.6rem;text-align:center;font-weight:800;font-size:.82rem;line-height:1.25;color:#fff;
  background:radial-gradient(circle at 35% 30%,color-mix(in srgb,var(--accent) 70%,#fff),var(--accent));
  box-shadow:0 10px 26px -10px color-mix(in srgb,var(--accent) 70%,transparent);animation:ks-breathe 4s ease-in-out infinite}
.ks-node{position:absolute;transform:translate(-50%,-50%);max-width:30%;font:inherit;font-size:.76rem;font-weight:700;line-height:1.25;color:var(--text);
  padding:.45rem .65rem;border-radius:12px;cursor:pointer;background:var(--surface);border:1px solid var(--border2,#C6D1DD);
  animation:ks-node .5s calc(var(--i) * 70ms + 200ms) both cubic-bezier(.3,1.5,.5,1)}
.ks-node.seen{border-color:var(--green)}
.ks-node.on{background:var(--accent)!important;color:#fff!important;transform:translate(-50%,-50%) scale(1.06)}
.ks-web-card{min-height:3rem;margin-top:.6rem}
.ks-pop{padding:.75rem .9rem;border-radius:14px;background:var(--surface);border-left:4px solid var(--accent);animation:ks-rise .35s cubic-bezier(.2,.8,.2,1)}
.ks-pop b{display:block;color:var(--text);margin-bottom:.2rem}
.ks-pop p{margin:0 0 .35rem;font-size:.88rem;color:var(--text2);line-height:1.55}
.ks-meter{font-size:.72rem;font-weight:700;color:var(--text3)}
@media (max-width:640px){
  .ks-web{aspect-ratio:auto;min-height:0;max-height:none;display:flex;flex-wrap:wrap;gap:.4rem}
  .ks-web-lines{display:none}
  .ks-web-hub{position:static;transform:none;width:100%;aspect-ratio:auto;border-radius:14px;min-height:0;animation:none}
  .ks-node{position:static;transform:none;max-width:none}
  .ks-node.on{transform:none}
}

/* match */
.ks-match{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:.6rem}
.ks-col{display:grid;gap:.45rem;align-content:start}
.ks-mt,.ks-md{position:relative;font:inherit;font-size:.84rem;text-align:left;line-height:1.4;padding:.55rem .75rem;border-radius:12px;cursor:pointer;color:var(--text);
  background:var(--surface);border:1px solid var(--border2,#C6D1DD);transition:transform .25s,opacity .3s,background .2s}
.ks-mt{font-weight:700}
.ks-mt.sel,.ks-md.sel{background:color-mix(in srgb,var(--accent) 16%,var(--surface))!important;transform:translateX(3px)}
.ks-mt.ok,.ks-md.ok{background:color-mix(in srgb,var(--green) 14%,var(--surface))!important;cursor:default;animation:ks-pop .4s cubic-bezier(.3,1.6,.5,1)}
.ks-mt.ok::before,.ks-md.ok::before{content:attr(data-n);position:absolute;top:-6px;left:-6px;width:18px;height:18px;border-radius:50%;font-size:.66rem;font-weight:900;line-height:18px;text-align:center;background:var(--green);color:#fff}
.ks .no{animation:ks-shake .4s}
@media (max-width:560px){.ks-match{grid-template-columns:1fr}}

/* true or false */
.ks-dots{display:flex;gap:.3rem;margin-bottom:.6rem}
.ks-dots i{width:22px;height:5px;border-radius:9px;background:color-mix(in srgb,var(--accent) 16%,transparent);transition:background .3s}
.ks-dots i.past{background:var(--green)}
.ks-dots i.now{background:var(--accent)}
.ks-tf-card{padding:.9rem 1rem;border-radius:16px;background:var(--surface);box-shadow:0 8px 20px -14px rgba(10,22,38,.4);animation:ks-deal .45s cubic-bezier(.2,.8,.2,1);transition:transform .5s cubic-bezier(.4,0,.2,1),opacity .5s,background .2s}
.ks-tf-card b{display:block;color:var(--accent);margin-bottom:.25rem}
.ks-tf-card p{margin:0;color:var(--text);line-height:1.55}
.ks-tf-card.ok{background:color-mix(in srgb,var(--green) 14%,var(--surface))}
.ks-tf-card.no{background:color-mix(in srgb,var(--red) 12%,var(--surface))}
.ks-tf-card.ok.go-r{transform:translateX(24px) rotate(2deg)}
.ks-tf-card.ok.go-l{transform:translateX(-24px) rotate(-2deg)}
.ks-tf-card .ks-fix{margin-top:.45rem;font-size:.84rem;color:var(--text2);animation:ks-rise .3s}
.ks-tf-btns{display:flex;gap:.5rem;margin-top:.7rem}
.ks-tf-btns .ks-btn{flex:1}

/* cover & recall */
.ks-cover{list-style:none;margin:0;padding:0;display:grid;gap:.5rem}
.ks-cover li{display:grid;grid-template-columns:minmax(0,.7fr) minmax(0,1.3fr) auto;align-items:center;gap:.6rem;padding:.55rem .7rem;border-radius:14px;background:var(--surface);transition:background .3s}
.ks-cover li > b{font-size:.86rem;color:var(--text)}
.ks-veil{position:relative;font:inherit;text-align:left;border:0;background:none;padding:.2rem .3rem;cursor:pointer;color:var(--text2);font-size:.84rem;line-height:1.45;border-radius:8px}
.ks-veil span{display:block;filter:blur(6px);opacity:.55;transition:filter .5s,opacity .5s;user-select:none}
.ks-veil em{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-style:normal;font-weight:700;font-size:.74rem;color:var(--accent);transition:opacity .3s}
.ks-veil.open{cursor:default}
.ks-veil.open span{filter:none;opacity:1;user-select:auto}
.ks-veil.open em{opacity:0;pointer-events:none}
.ks-rate{display:flex;gap:.3rem}
.ks-rate .ks-btn{font-size:.74rem;padding:.3rem .6rem}
.ks-cover li.knew{background:color-mix(in srgb,var(--green) 12%,var(--surface))}
.ks-cover li.miss{background:color-mix(in srgb,var(--amber,#E0A33A) 14%,var(--surface))}
@media (max-width:560px){.ks-cover li{grid-template-columns:1fr}}

/* order */
.ks-line{list-style:none;margin:0 0 .7rem;padding:0;display:flex;flex-wrap:wrap;align-items:center;gap:.35rem;min-height:2.3rem}
.ks-step{display:inline-flex;align-items:center;gap:.35rem;padding:.4rem .7rem;border-radius:999px;font-size:.82rem;font-weight:700;color:#fff;background:var(--accent);animation:ks-snap .4s cubic-bezier(.3,1.6,.5,1)}
.ks-step:not(:last-child)::after{content:"→";margin-left:.25rem;opacity:.7}
.ks-order.solved .ks-step{background:var(--green);animation:ks-wave .6s calc(var(--i) * 80ms) both}
.ks-pool{display:flex;flex-wrap:wrap;gap:.4rem}
.ks-chip{font:inherit;font-size:.82rem;font-weight:600;padding:.42rem .75rem;border-radius:999px;cursor:pointer;color:var(--text);background:var(--surface);border:1px dashed color-mix(in srgb,var(--accent) 45%,transparent)}

/* fill the gap */
.ks-gap .ks-chip.ok{background:var(--green)!important;color:#fff;border-style:solid}
.ks-gap .ks-pool{margin-top:.2rem}
/* guess the number */
.ks-numq{font-size:.96rem;line-height:1.6;color:var(--text);margin:0 0 .7rem}
.ks-blank{display:inline-block;min-width:2.4em;padding:0 .4em;border-radius:8px;text-align:center;font-weight:900;color:var(--accent);background:color-mix(in srgb,var(--accent) 14%,transparent)}
.ks-blank.ok{color:#fff;background:var(--green);animation:ks-pop .4s}
.ks-blank.no{color:#fff;background:var(--accent);animation:ks-pop .4s}
.ks-slide{display:flex;align-items:center;gap:.8rem}
.ks-slide input{flex:1;accent-color:var(--accent)}
.ks-slide output{min-width:6.5em;font-weight:800;font-variant-numeric:tabular-nums;color:var(--text)}
.ks-gauge{position:relative;height:10px;margin:.8rem 0;border-radius:99px;background:color-mix(in srgb,var(--accent) 12%,transparent);opacity:0;transition:opacity .3s}
.ks-gauge.show{opacity:1}
.ks-gauge i{position:absolute;top:50%;width:14px;height:14px;margin:-7px 0 0 -7px;border-radius:50%;left:0;transition:left .8s cubic-bezier(.2,.8,.2,1)}
.ks-gauge .g{background:var(--text3);box-shadow:0 0 0 3px var(--surface)}
.ks-gauge .t{background:var(--green);box-shadow:0 0 0 3px var(--surface),0 0 12px var(--green);transition-delay:.25s}

/* which column */
.ks-sort-q{padding:.85rem 1rem;border-radius:16px;background:var(--surface);margin-bottom:.8rem;animation:ks-deal .4s cubic-bezier(.2,.8,.2,1);transition:transform .45s cubic-bezier(.4,0,.2,1),opacity .45s}
.ks-sort-q.fly{transform:translateY(40px) scale(.8);opacity:0}
.ks-sort-row{display:block;font-size:.72rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--text3);margin-bottom:.2rem}
.ks-sort-q b{color:var(--text);font-size:.98rem}
.ks-bins{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:.5rem}
.ks-bin{display:flex;flex-direction:column;align-items:center;gap:.2rem;font:inherit;font-weight:700;font-size:.84rem;padding:.7rem .5rem;border-radius:14px;cursor:pointer;color:var(--text);
  background:var(--surface);border:1px solid var(--border2,#C6D1DD)}
.ks-bin em{font-style:normal;font-size:1.1rem;font-weight:900;color:var(--accent)}
.ks-bin.ok{animation:ks-pop .4s cubic-bezier(.3,1.6,.5,1);background:color-mix(in srgb,var(--green) 14%,var(--surface))!important}
.ks-bin.hint{animation:ks-glow 1s}

/* teach it back */
.ks-teach textarea{width:100%;box-sizing:border-box;font:inherit;font-size:.9rem;line-height:1.55;padding:.7rem .85rem;resize:vertical;min-height:96px}
.ks-keys{display:flex;flex-wrap:wrap;gap:.35rem;margin:.6rem 0}
.ks-key{font-size:.74rem;font-weight:700;padding:.22rem .6rem;border-radius:999px;color:var(--text3);background:color-mix(in srgb,var(--accent) 7%,transparent);transition:background .3s,color .3s,transform .3s}
.ks-key.hit{color:#fff;background:var(--green);transform:scale(1.05)}
.ks-teach-act{display:flex;align-items:center;gap:.8rem;flex-wrap:wrap}
.ks-cov{font-size:.78rem;font-weight:700;color:var(--text3)}
.ks-fb{margin-top:.7rem}
.ks-ai{padding:.8rem .95rem;border-radius:14px;background:var(--surface);border-left:4px solid var(--green);font-size:.88rem;line-height:1.6;color:var(--text);animation:ks-rise .4s}
.ks-ai-tag{display:block;font-size:.68rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--green);margin-bottom:.3rem}
.ks-warn{color:var(--accent);font-size:.84rem;margin:0}
.ks-think{display:flex;align-items:center;gap:.3rem;color:var(--text3);font-size:.84rem;margin:0}
.ks-think i{width:6px;height:6px;border-radius:50%;background:var(--accent);animation:ks-bob 1s ease-in-out infinite}
.ks-think i:nth-child(2){animation-delay:.15s}.ks-think i:nth-child(3){animation-delay:.3s}

@keyframes ks-rise{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
@keyframes ks-pop{0%{transform:scale(.7)}60%{transform:scale(1.08)}100%{transform:scale(1)}}
@keyframes ks-shake{0%,100%{translate:0}20%{translate:-6px}40%{translate:5px}60%{translate:-3px}80%{translate:2px}}
@keyframes ks-draw{from{opacity:0}to{opacity:1}}
@keyframes ks-node{from{opacity:0;scale:.4}to{opacity:1;scale:1}}
@keyframes ks-breathe{0%,100%{scale:1}50%{scale:1.04}}
@keyframes ks-bob{0%,100%{translate:0 0}50%{translate:0 -3px}}
@keyframes ks-deal{from{opacity:0;transform:translateY(14px) rotate(-1.5deg)}to{opacity:1;transform:none}}
@keyframes ks-snap{from{opacity:0;scale:.5}to{opacity:1;scale:1}}
@keyframes ks-wave{0%,100%{translate:0 0}40%{translate:0 -6px}}
@keyframes ks-spin{from{rotate:-180deg;scale:.3}to{rotate:0deg;scale:1}}
@keyframes ks-glow{0%,100%{box-shadow:none}30%{box-shadow:0 0 0 3px var(--green)}}
@media (prefers-reduced-motion:reduce){.ks *,.ks{animation:none!important;transition:none!important}}

/* ── Sources (knowledge-fx.js sources(); references in vt-sources.js) ─────── */
.vt-refs{margin:2.2rem 0 1rem;padding:1.1rem 1.25rem 1rem;border-radius:20px;background:var(--surface);box-shadow:var(--sg-raise-sm,0 4px 14px rgba(0,0,0,.08)),var(--sg-rim,none);font-size:.86rem;line-height:1.55;color:var(--text2,var(--text))}
.vt-refs.vr-page{max-width:980px;margin:2.4rem auto 2rem}
.vt-refs .vr-h{display:flex;gap:.8rem;align-items:flex-start;margin-bottom:.6rem}
.vt-refs .vr-ico{flex:none;width:34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.3rem;line-height:1;color:var(--accent);background:var(--surface2,var(--surface));box-shadow:var(--sg-press-sm,inset 0 1px 3px rgba(0,0,0,.12))}
.vt-refs .vr-title{font-family:var(--font-heading,inherit);font-weight:800;font-size:1rem;color:var(--text);letter-spacing:.01em}
.vt-refs .vr-note,.vt-biblio .vr-note{font-size:.76rem;color:var(--text3,var(--text2));margin-top:.15rem}
.vt-refs ol{margin:.2rem 0 0;padding-left:1.35rem;display:grid;gap:.45rem}
.vt-refs li{padding-left:.2rem}
.vt-refs li::marker{color:var(--accent);font-weight:700;font-size:.78rem}
.vt-refs .vr-a{color:var(--text)}
.vt-refs .vr-t{font-style:italic}
.vt-refs .vr-s{color:var(--text3,var(--text2))}
.vt-refs .vr-l{margin-left:.35rem;font-size:.72rem;font-weight:700;white-space:nowrap;color:var(--accent);text-decoration:none}
.vt-refs .vr-l:hover{text-decoration:underline}
.vt-refs .vr-k{display:inline-block;margin-left:.45rem;padding:.02rem .45rem;border-radius:99px;font-size:.62rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;vertical-align:1px;
  color:var(--text3,var(--text2));background:var(--surface2,transparent);border:1px solid var(--border,rgba(0,0,0,.08))}
.vt-refs li:target{background:color-mix(in srgb,var(--accent) 12%,transparent);border-radius:8px}
.vt-biblio{max-width:980px;margin:2.4rem auto 2rem;padding:0 16px}
.vt-biblio h2{font-family:var(--font-heading,inherit);font-size:1.5rem;margin:0 0 .3rem}
.vt-biblio .vr-group{margin-top:.7rem;border-radius:16px;background:var(--surface);box-shadow:var(--sg-raise-xs,0 2px 8px rgba(0,0,0,.06)),var(--sg-rim,none);overflow:hidden}
.vt-biblio summary{cursor:pointer;list-style:none;padding:.8rem 1.1rem;font-weight:700;display:flex;justify-content:space-between;align-items:center;gap:1rem}
.vt-biblio summary::-webkit-details-marker{display:none}
.vt-biblio summary span{font-size:.7rem;padding:.12rem .55rem;border-radius:99px;background:var(--surface2,transparent);color:var(--text3,var(--text2))}
.vt-biblio .vr-group[open] summary{border-bottom:1px solid var(--border,rgba(0,0,0,.08))}
.vt-biblio .vr-group .vt-refs{margin:0;box-shadow:none;border-radius:0;background:transparent}
.vt-biblio .vr-kb{padding:.6rem 1.1rem 1rem;display:grid;gap:.35rem;font-size:.82rem}
.vt-biblio .vr-kb-row{display:flex;gap:.8rem;justify-content:space-between;border-bottom:1px dashed var(--border,rgba(0,0,0,.08));padding-bottom:.3rem}
.vt-biblio .vr-kb-row b{text-transform:capitalize;font-weight:600}
.vt-biblio .vr-kb-row span{text-align:right;color:var(--text3,var(--text2))}
.vt-biblio .vr-kb-row a{color:var(--accent);text-decoration:none}
@media (max-width:600px){.vt-refs{padding:.9rem .9rem .8rem;font-size:.8rem}.vt-biblio .vr-kb-row{flex-direction:column;gap:.1rem}.vt-biblio .vr-kb-row span{text-align:left}}
section.chapter > .vt-refs{max-width:800px;margin-left:auto;margin-right:auto}