/* =====================================================================
   LEARN: THE DIFFERENTIAL (owner 2026-10-13; built as Case Files, renamed 2026-10-15). Linked from /learn/ and /learn/differential/, after site.css, with the same ?v= asset version.
   The house rules apply: the tokens of site.css (Charcoal Umber ground, Sepia Ink panels, Parchment text, one Sanguine accent), Antonio for
   display and numbers, Garet for reading, IBM Plex Sans for labels (t-mono), plates with Parchment corner ticks, hairline rules, hatching.
   Sizes are in rem, so the laptop scale of site.css (root type 1.1111vw from 1441 px on a fine pointer) grows this page with the others;
   at 1440 and below, and on phones, 1rem is 16 px as drawn. Touch targets are 44 px or more. html.still and prefers-reduced-motion: no motion.
   ===================================================================== */

/* ---------- shared pieces ---------- */
.cf-sec .fallback{color:var(--text-secondary)}
.cf-arr{width:1.5rem;height:1.5rem;flex:none;fill:none;stroke:var(--text-primary);stroke-width:1.25;stroke-linecap:round;stroke-linejoin:round;
  transition:transform .5s var(--ease-out)}
.cf-tgt{width:1.5rem;height:1.5rem;fill:none;stroke:var(--accent);stroke-width:1.2;vector-effect:non-scaling-stroke;overflow:visible}
.cf-tgt .cf-tgt__d{fill:var(--accent);stroke:none}
/* the plate frame: a hairline box with the four Parchment corner ticks of .hplate__frame */
.cfe__v,.cf__play,.cfn__s--or{position:relative}
.cfe__v::after,.cf__play::after{content:"";position:absolute;inset:-1px;pointer-events:none;--k:rgba(242,233,216,.8);
  background:
    linear-gradient(var(--k),var(--k)) left top/1rem 1px no-repeat,linear-gradient(var(--k),var(--k)) left top/1px 1rem no-repeat,
    linear-gradient(var(--k),var(--k)) right top/1rem 1px no-repeat,linear-gradient(var(--k),var(--k)) right top/1px 1rem no-repeat,
    linear-gradient(var(--k),var(--k)) left bottom/1rem 1px no-repeat,linear-gradient(var(--k),var(--k)) left bottom/1px 1rem no-repeat,
    linear-gradient(var(--k),var(--k)) right bottom/1rem 1px no-repeat,linear-gradient(var(--k),var(--k)) right bottom/1px 1rem no-repeat}

/* ---------- FIG. 01: the case ---------- */
.cf{position:relative;min-height:20rem}
.cf.loading{min-height:32rem}
.cf__top{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,22rem);gap:2rem clamp(2rem,6vw,6rem);align-items:end;margin-bottom:clamp(2rem,5vh,4.5rem)}
.cf__k{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem 0;margin-bottom:1.25rem;color:var(--text-secondary)}
/* the separator ends a line when the label wraps (never starts one) */
.cf__k span:not(:last-child)::after{content:"//";margin:0 .9em;opacity:.6}
.cf__k .cf__arc{color:var(--text-primary)}
.cf__t{font-size:clamp(2.4rem,5.4vw,4.6rem);line-height:1.02;max-width:16ch;outline:none}
.cf__fic{margin-top:1.25rem;max-width:52ch;color:var(--text-secondary);font-size:1rem}
.cf__back{margin-top:.5rem}
.cf__next{display:flex;flex-wrap:wrap;gap:.25rem .9em;margin-top:1.25rem;padding-top:1rem;border-top:1px solid var(--rule);color:var(--text-secondary)}
.cf__next span:last-child{color:var(--text-primary)}

/* the meter: six stations on an engraved rule */
.cfm__k{color:var(--text-primary);margin-bottom:.9rem}
.cfm__v{margin-top:.9rem;color:var(--text-secondary)}
.cfm__rule{position:relative;display:grid;grid-template-columns:repeat(6,minmax(0,1fr));align-items:start}
.cfm__rule::before{content:"";position:absolute;left:calc(100% / 12);right:calc(100% / 12);top:.75rem;height:1px;background:var(--rule-strong)}
.cfm__s{position:relative;display:grid;justify-items:center;gap:.5rem}
.cfm__dot{position:relative;width:1.5rem;height:1.5rem;border-radius:50%;border:1px solid var(--rule-strong);background:var(--canvas);
  transition:border-color .6s var(--ease-out),background-color .6s var(--ease-out),transform .6s var(--ease-out)}
.cfm__n{color:var(--text-secondary);font-size:.6875rem;letter-spacing:.12em}
.cfm__s.is-open .cfm__dot{border-color:var(--text-primary)}
.cfm__s.is-now .cfm__dot{border-color:var(--accent);box-shadow:0 0 0 .3125rem rgba(168,67,46,.16)}
.cfm__s.is-now .cfm__dot::before{content:"";position:absolute;inset:.4375rem;border-radius:50%;background:var(--accent)}
.cfm__s.is-now .cfm__n,.cfm__s.is-hit .cfm__n{color:var(--text-primary)}
.cfm__s.is-miss .cfm__dot{border-color:var(--rule-strong);background:
  linear-gradient(45deg,transparent calc(50% - .5px),var(--text-secondary) calc(50% - .5px),var(--text-secondary) calc(50% + .5px),transparent calc(50% + .5px)),
  linear-gradient(-45deg,transparent calc(50% - .5px),var(--text-secondary) calc(50% - .5px),var(--text-secondary) calc(50% + .5px),transparent calc(50% + .5px)),var(--canvas)}
.cfm__s.is-hit .cfm__dot{border-color:var(--accent);background:var(--accent);box-shadow:0 0 0 .3125rem rgba(168,67,46,.22)}
html.motion-on:not(.still) .cfm__s.is-now .cfm__dot{animation:cfBreath 2.8s var(--ease-inout) infinite}
@keyframes cfBreath{50%{box-shadow:0 0 0 .5rem rgba(168,67,46,.06)}}

/* the clues and the play panel */
.cf__grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);grid-template-areas:"open play" "sealed play";column-gap:clamp(2rem,5vw,5rem);align-items:start}
.cf__clues--open{grid-area:open;border-top:1px solid var(--rule-strong)}
.cf__clues--sealed{grid-area:sealed}
.cf.is-done .cf__grid{display:none}
.cfc{position:relative;display:grid;grid-template-columns:4.5rem minmax(0,1fr);grid-template-areas:"n l" "n b";column-gap:1.25rem;padding:1.5rem 0 1.625rem;border-bottom:1px solid var(--rule)}
.cfc__h{display:contents}
.cfc__n{grid-area:n;font-family:var(--f-display);font-weight:300;font-size:2.75rem;line-height:.9;color:var(--text-primary);opacity:.3;font-variant-numeric:tabular-nums;
  transition:opacity .7s var(--ease-out),color .7s var(--ease-out)}
.cfc__l{grid-area:l;display:flex;align-items:center;gap:.75rem;color:var(--text-secondary);min-height:1.5rem}
.cfc__mk{display:none;margin-left:auto}
.cfc__b{grid-area:b;position:relative;margin-top:.625rem}
.cfc__x{max-width:60ch;font-size:clamp(1.0625rem,1.15vw,1.125rem);line-height:1.66;color:var(--text-primary)}
/* a sealed clue: one quiet line, its number, its name and a hatched seal */
.cfc.is-sealed{grid-template-columns:4.5rem minmax(0,1fr) auto;grid-template-areas:"n l b";align-items:center;padding:.75rem 0}
.cfc.is-sealed .cfc__n{font-size:1.875rem;opacity:.22}
.cfc.is-sealed .cfc__l{opacity:.7}
.cfc.is-sealed .cfc__b{margin:0}
.cfc__seal{display:inline-flex;align-items:center;gap:1rem;height:2.25rem;padding:0 .875rem;border:1px solid var(--rule);color:var(--text-secondary);
  background:repeating-linear-gradient(-45deg,rgba(242,233,216,.08) 0 1px,transparent 1px 7px)}
.cfc__seal span + span{display:none}
.cfc__wax{display:none;position:absolute;left:-.5rem;right:-.5rem;top:-.25rem;bottom:-.25rem;z-index:2;border:1px solid var(--rule);
  background:repeating-linear-gradient(-45deg,rgba(242,233,216,.12) 0 1px,transparent 1px 7px),var(--canvas)}
.cfc.is-sealed .cfc__x{display:none}
.cfc.is-open .cfc__seal{display:none}
.cfc.is-open .cfc__n{opacity:.95}
.cfc.is-open .cfc__l{color:var(--text-primary)}
.cfc.is-hit .cfc__n{color:var(--accent);opacity:1}
.cfc.is-hit .cfc__mk{display:inline-flex}
.cfc.is-extra .cfc__x,.cfc.is-extra .cfc__l{color:var(--text-secondary)}
.cfc.is-extra .cfc__n{opacity:.3}
/* THE OPENING: the hatched seal wipes off and the words develop under it; a Sanguine hairline runs across the top of the clue */
.cfc::before{content:"";position:absolute;left:0;right:0;top:-1px;height:1px;background:var(--accent);transform:scaleX(0);transform-origin:left center;pointer-events:none}
.cfc.is-new::before{animation:cfLine 1.4s var(--ease-inout) both}
.cfc.is-new .cfc__wax{display:block;animation:cfWipe .8s var(--ease-inout) both}
.cfc.is-new .cfc__x{animation:cfDevelop 1.1s var(--ease-out) .28s both}
.cfc.is-new .cfc__n{animation:cfNum 1.4s var(--ease-out) both}
@keyframes cfLine{0%{transform:scaleX(0);opacity:1}60%{transform:scaleX(1);opacity:1}100%{transform:scaleX(1);opacity:0}}
@keyframes cfWipe{from{clip-path:inset(0 0 0 0)}to{clip-path:inset(0 0 0 100%)}}
@keyframes cfDevelop{from{opacity:0;transform:translateY(.5rem);filter:blur(5px)}to{opacity:1;transform:none;filter:none}}
@keyframes cfNum{0%{color:var(--accent);opacity:1}100%{color:var(--text-primary);opacity:.95}}

.cf__play{grid-area:play;position:sticky;top:calc(var(--hdr-h) + 2rem);padding:clamp(1.25rem,2.4vw,2rem);border:1px solid var(--rule);background:rgba(59,43,36,.34)}
.cf__play.is-done{display:none}
.cfp__lb{display:block;color:var(--text-secondary);margin-bottom:.625rem}
.cfp__box{position:relative}
.cfp__in{appearance:none;display:block;width:100%;min-height:3.5rem;padding:0 1rem;background:rgba(38,32,26,.72);border:1px solid var(--rule-strong);border-radius:2px;
  color:var(--text-primary);font-family:var(--f-body);font-weight:400;font-size:max(1rem,16px);letter-spacing:.02em;transition:border-color .45s var(--ease-out)}
.cfp__in::placeholder{color:var(--text-secondary);opacity:1}
.cfp__in:hover{border-color:var(--text-primary)}
.cfp__in:focus{border-color:var(--text-primary)}
.cfp__in[aria-invalid="true"]{border-color:var(--accent)}
/* the suggestions open in the flow, under the box, so they never cover the buttons (a phone keyboard leaves little room) */
.cfp__list{position:relative;z-index:3;margin-top:.375rem;max-height:min(18rem,40vh);overflow:auto;overscroll-behavior:contain;padding:.375rem 0;
  background:#2E2620;border:1px solid var(--rule-strong);box-shadow:0 1rem 2.5rem rgba(20,16,12,.45)}
.cfo{display:flex;flex-direction:column;justify-content:center;gap:.125rem;min-height:2.875rem;padding:.5rem 1rem .5rem 1.125rem;cursor:pointer;position:relative;color:var(--text-secondary)}
.cfo__t{color:var(--text-primary);font-weight:400}
.cfo__v{font-size:.8125rem;color:var(--text-secondary)}
.cfo mark{background:none;color:var(--text-primary);box-shadow:inset 0 -1px 0 var(--accent)}
.cfo.is-active{background:rgba(242,233,216,.07)}
.cfo.is-active::before{content:"";position:absolute;left:0;top:.5rem;bottom:.5rem;width:2px;background:var(--accent)}
.cfo.is-tried{cursor:default;opacity:.55}
.cfo.is-tried .cfo__t{text-decoration:line-through;text-decoration-thickness:1px}
.cfp__help{margin-top:.625rem;font-size:.875rem;line-height:1.5;color:var(--text-secondary)}
.cfp__row{display:flex;flex-wrap:wrap;align-items:center;gap:.75rem 1.5rem;margin-top:1.25rem}
.cfp__skip{appearance:none;display:inline-flex;align-items:center;min-height:2.75rem;padding:0;background:none;border:0;cursor:pointer;color:var(--text-secondary);
  text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:.3rem;text-decoration-color:var(--rule-strong);transition:color .4s var(--ease-out)}
.cfp__skip:hover{color:var(--text-primary);text-decoration-color:currentColor}
.cfp__msg{min-height:1.5em;margin-top:1rem;font-size:.9375rem;line-height:1.5;color:var(--text-primary)}
.cfp__msg:empty{margin-top:0;min-height:0}
.cfp__msg.is-err,.cfp__msg.is-warm,.cfp__msg.is-miss{padding-left:.875rem;border-left:2px solid var(--rule-strong)}
.cfp__msg.is-err{border-left-color:var(--accent)}
.cfp__msg.is-warm{border-left-color:var(--accent)}
.cfp__gs{margin-top:1.5rem;padding-top:1.25rem;border-top:1px solid var(--rule)}
.cfp__gk{color:var(--text-secondary);margin-bottom:.5rem}
.cfg{display:grid;grid-template-columns:1.5rem minmax(0,1fr) auto;align-items:center;gap:.75rem;min-height:2.75rem;border-bottom:1px solid var(--rule)}
.cfg:last-child{border-bottom:0}
.cfg__m{display:inline-flex;justify-content:center;color:var(--text-secondary);font-size:.875rem}
.cfg__t{color:var(--text-primary);overflow-wrap:anywhere}
.cfg__s{color:var(--text-secondary);font-size:.6875rem}
.cfg.is-skip .cfg__t{color:var(--text-secondary)}
.cfg.is-warm .cfg__s{color:var(--text-primary);padding-bottom:.125rem;border-bottom:1px dashed var(--accent)}
.cfg.is-right .cfg__s{color:var(--text-primary)}

/* ---------- the end of a case: the verdict, the share line, the board form ---------- */
.cf__end:empty{display:none}
.cfe{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:clamp(1.5rem,4vw,4rem);align-items:start;margin-top:clamp(2.5rem,6vh,4.5rem);scroll-margin-top:calc(var(--hdr-h) + 1.5rem)}
.cfe__v{padding:clamp(1.5rem,3.2vw,3rem);border:1px solid var(--rule);background:radial-gradient(120% 90% at 85% 0%,rgba(168,67,46,.16),transparent 60%),rgba(59,43,36,.4);overflow:hidden}
.cfe__k{display:flex;align-items:center;gap:1.125rem;color:var(--text-secondary)}
.cfe__k::before{content:"";width:1.75rem;height:1px;background:var(--accent)}
.cfe__dx{margin-top:1.125rem;font-size:clamp(2.4rem,5.6vw,4.8rem);line-height:1.02;max-width:14ch;outline:none}
.cfe__full{margin-top:1rem;max-width:44ch;color:var(--text-secondary)}
.cfe__stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem;margin:clamp(1.5rem,4vh,2.5rem) 0 0;padding-top:1.25rem;border-top:1px solid var(--rule)}
.cfe__stats div{display:grid;gap:.25rem}
.cfe__stats dt{color:var(--text-secondary);font-size:.6875rem}
.cfe__stats dd{margin:0;font-family:var(--f-display);font-weight:300;font-size:clamp(2.2rem,4vw,3.25rem);line-height:1;font-variant-numeric:tabular-nums}
.cfe__stats dd small{font-size:.5em;margin-left:.1em;color:var(--text-secondary)}
.cfe__seal{position:absolute;right:clamp(1rem,2.5vw,2rem);top:clamp(1rem,2.5vw,2rem)}
.cfe__seal .cf-tgt{width:clamp(3.5rem,6vw,5rem);height:clamp(3.5rem,6vw,5rem);stroke-width:1}
.cfe__seal .cf-tgt circle:first-child,.cfe__seal .cf-tgt path{stroke-dasharray:60;stroke-dashoffset:0}
html.motion-on:not(.still) .reveal.in .cfe__seal .cf-tgt circle:first-child{animation:cfDraw 1.6s var(--ease-inout) .4s both}
html.motion-on:not(.still) .reveal.in .cfe__seal .cf-tgt path{animation:cfDraw 1.1s var(--ease-inout) 1.1s both}
@keyframes cfDraw{from{stroke-dashoffset:60}to{stroke-dashoffset:0}}
.cfe__side{display:grid;gap:clamp(1.5rem,3vh,2rem)}
.cfe__sk{color:var(--text-secondary);margin-bottom:.625rem}
.cfe__line{margin:0;padding:1rem 1.25rem;border:1px dashed var(--rule-strong);background:rgba(38,32,26,.6);color:var(--text-primary);
  font-family:var(--f-mono);font-size:.875rem;line-height:1.75;letter-spacing:.04em;white-space:pre-wrap;overflow-wrap:anywhere;user-select:all;-webkit-user-select:all}
.cfe__srow{display:flex;flex-wrap:wrap;align-items:center;gap:.75rem 1.5rem;margin-top:1rem}
.cfe__smsg{min-height:1.5em;margin-top:.5rem;font-size:.875rem;color:var(--text-secondary)}
.cfe__board{padding-top:1.5rem;border-top:1px solid var(--rule)}
.cfe__post label{display:block;color:var(--text-secondary);margin-bottom:.625rem}
.cfe__prow{display:flex;flex-wrap:wrap;gap:.75rem}
.cfe__nick{flex:1 1 12rem;min-height:3rem}
.cfe__help{margin-top:.625rem;font-size:.8125rem;line-height:1.5;color:var(--text-secondary)}
.cfe__pmsg{min-height:1.5em;margin-top:.5rem;font-size:.9375rem}
.cfe__pmsg.is-err{padding-left:.875rem;border-left:2px solid var(--accent)}
.cfe__pnote{color:var(--text-secondary);font-size:.9375rem}
.cfe__posted{display:flex;flex-wrap:wrap;align-items:baseline;gap:.5rem 1rem;font-size:1.25rem}
.cfe__posted .t-mono{color:var(--text-secondary)}
.cfe__posted bdi{font-family:var(--f-display);font-size:1.75rem;letter-spacing:.04em}

/* ---------- the case notes ---------- */
.cfn{margin-top:clamp(4rem,10vh,7rem);padding-top:clamp(2rem,5vh,3.5rem);border-top:1px solid var(--rule-strong)}
.cfn__head{display:grid;gap:1rem;margin-bottom:clamp(2rem,5vh,3.5rem)}
.cfn__head .t-mono{color:var(--text-secondary)}
.cfn__head .t-title{font-size:clamp(2rem,4.4vw,3.6rem);max-width:22ch}
.cfn__full{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 clamp(1.5rem,4vw,4rem);margin:0 0 clamp(2.5rem,6vh,4rem)}
.cfn__row{padding:1.125rem 0;border-top:1px solid var(--rule)}
.cfn__row dt{display:flex;align-items:center;gap:.75rem;color:var(--text-secondary);font-family:var(--f-mono);font-size:.75rem;letter-spacing:.14em;text-transform:uppercase}
.cfn__row dd{margin:.5rem 0 0;line-height:1.62}
.cfn__row.is-hit dt{color:var(--text-primary)}
.cfn__row.is-hit .cfn__i{color:var(--accent)}
.cfn__i{font-family:var(--f-display);font-size:1.125rem;letter-spacing:.04em}
.cfn__s{display:grid;grid-template-columns:minmax(0,15rem) minmax(0,1fr);gap:1rem clamp(1.5rem,4vw,4rem);padding:clamp(1.75rem,4vh,2.75rem) 0;border-top:1px solid var(--rule)}
.cfn__sh{color:var(--text-secondary);padding-top:.35em}
.cfn__p{display:grid;gap:1.125rem;max-width:64ch}
.cfn__p p{line-height:1.7}
.cfn__s--or{margin:clamp(.5rem,2vh,1rem) 0;padding:clamp(1.75rem,4vh,2.75rem) clamp(1.25rem,3vw,2.5rem);border:1px solid var(--rule);
  background:linear-gradient(90deg,rgba(168,67,46,.1),transparent 55%),rgba(59,43,36,.3)}
.cfn__s--or .cfn__sh{color:var(--text-primary)}
.cfn__s--or .cfn__sh::before{content:"";display:block;width:1.75rem;height:1px;background:var(--accent);margin-bottom:.875rem}
.cfn__orm{position:absolute;right:clamp(1rem,2.5vw,2rem);bottom:clamp(1rem,2.5vw,2rem);width:clamp(4rem,7vw,6rem);height:auto;opacity:.75;pointer-events:none}
.cfn__take{display:grid;gap:1rem;max-width:64ch}
.cfn__take li{display:grid;grid-template-columns:2.5rem minmax(0,1fr);gap:.75rem;align-items:baseline}
.cfn__take .cfn__i{color:var(--accent);font-size:1.25rem}
.cfn__refs{display:grid;gap:1.25rem;max-width:72ch}
.cfr__t{font-size:.9375rem;line-height:1.6;color:var(--text-secondary)}
.cfr__l{display:flex;flex-wrap:wrap;gap:0 1.5rem;margin-top:.125rem}
.cfr__a{display:inline-flex;align-items:center;min-height:2.75rem;color:var(--text-primary);text-transform:none;letter-spacing:.04em;
  text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:.3rem;text-decoration-color:var(--rule-strong);overflow-wrap:anywhere}
.cfr__a:hover{text-decoration-color:currentColor}
.cfn__next{margin-top:clamp(2rem,5vh,3rem);color:var(--text-secondary)}

/* ---------- before the first case ---------- */
.cf__wait .cf__t{max-width:20ch}
.cf__count{display:inline-flex;margin-top:1.5rem;padding:.625rem 1rem;border:1px solid var(--accent);color:var(--text-primary)}
.cf__clues--wait{margin-top:clamp(2.5rem,6vh,4rem);max-width:46rem}

/* ---------- FIG. 02: the board ---------- */
.cfb{border-top:1px solid var(--rule-strong)}
.cfb__r{display:grid;grid-template-columns:3.25rem minmax(0,1fr) auto 5.5rem;align-items:center;gap:1rem;min-height:3.75rem;padding:.5rem 0;border-bottom:1px solid var(--rule);position:relative}
.cfb__n{font-family:var(--f-display);font-weight:300;font-size:1.75rem;line-height:1;opacity:.45;font-variant-numeric:tabular-nums}
.cfb__r.is-first .cfb__n{color:var(--accent);opacity:1}
.cfb__name{font-size:1.125rem;font-weight:400;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.cfb__m{color:var(--text-secondary);font-size:.6875rem}
.cfb__p{justify-self:end;font-family:var(--f-display);font-size:1.75rem;line-height:1;font-variant-numeric:tabular-nums}
.cfb__p .t-mono{font-size:.625rem;color:var(--text-secondary);margin-left:.25rem}
.cfb__r.is-me{background:linear-gradient(90deg,rgba(168,67,46,.16),transparent 70%)}
.cfb__r.is-me::before{content:"";position:absolute;left:-.75rem;top:.75rem;bottom:.75rem;width:2px;background:var(--accent)}
.cfb__empty,.cfb__load{padding:1.25rem 0;color:var(--text-secondary)}
.cfb__more{margin-top:1rem;color:var(--text-secondary)}
html.motion-on:not(.still) .cfb__load{animation:cfFade 1.6s var(--ease-inout) infinite alternate}
@keyframes cfFade{to{opacity:.45}}

/* ---------- FIG. 03: the Casebook (the archive) ---------- */
.cfa{border-top:1px solid var(--rule-strong)}
.cfa__r{position:relative;display:grid;grid-template-columns:clamp(3.5rem,8vw,7rem) minmax(0,1fr) auto 1.5rem;align-items:center;gap:1rem clamp(1rem,3vw,2.5rem);
  padding:clamp(1.25rem,3vh,1.75rem) 0;border-bottom:1px solid var(--rule)}
.cfa__n{font-family:var(--f-display);font-weight:300;font-size:clamp(2.4rem,4.4vw,3.75rem);line-height:.9;opacity:.32;font-variant-numeric:tabular-nums;transition:opacity .6s var(--ease-out)}
.cfa__r:hover .cfa__n,.cfa__r:focus-within .cfa__n,.cfa__r.is-here .cfa__n{opacity:.95}
.cfa__r.is-here .cfa__n{color:var(--accent)}
.cfa__k{color:var(--text-secondary);margin-bottom:.375rem}
.cfa__t{font-family:var(--f-head);font-weight:600;font-size:clamp(1.125rem,1.6vw,1.375rem);line-height:1.3}
.cfa__t a{text-decoration:none;color:var(--text-primary)}
.cfa__t a::after{content:"";position:absolute;inset:0}
.cfa__dx{margin-top:.25rem;color:var(--text-secondary);font-size:.9375rem}
.cfa__s{display:flex;flex-direction:column;align-items:flex-end;gap:.25rem;color:var(--text-secondary);text-align:right}
.cfa__s.is-won{color:var(--text-primary)}
.cfa__here{color:var(--text-primary);padding:.125rem .5rem;border:1px solid var(--accent)}
.cfa__r:hover .cf-arr,.cfa__r:focus-within .cf-arr{transform:translateX(.25rem)}
.cfa__r.is-sealed{opacity:.6}
.cfa__r.is-sealed .cfa__n{opacity:.25}
.cfa__r.is-sealed .cfa__t{font-weight:400;color:var(--text-secondary)}

/* ---------- FIG. 04: how it works ---------- */
.cf-rules{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:clamp(2.5rem,6vw,6rem);align-items:start}
.cf-rules__a .t-title{max-width:14ch}
.cf-steps{display:grid;gap:1.5rem;margin-top:clamp(2rem,5vh,3rem);max-width:56ch}
.cf-steps li{display:grid;grid-template-columns:3rem minmax(0,1fr);gap:1rem;padding-top:1.25rem;border-top:1px solid var(--rule)}
.cf-steps__n{color:var(--accent);padding-top:.3em}
.cf-steps p{color:var(--text-secondary)}
.cf-pts{width:100%;border-collapse:collapse;font-variant-numeric:tabular-nums}
.cf-pts caption{text-align:left;color:var(--text-secondary);padding-bottom:.75rem}
.cf-pts th,.cf-pts td{padding:.625rem 0;border-bottom:1px solid var(--rule);text-align:left;font-weight:300}
.cf-pts thead th{font-family:var(--f-mono);font-size:.6875rem;letter-spacing:.14em;text-transform:uppercase;color:var(--text-secondary);font-weight:400}
.cf-pts td{text-align:right;font-family:var(--f-display);font-size:1.375rem}
.cf-pts thead th:last-child{text-align:right}
.cf-pts__b{display:block;font-family:var(--f-body);font-size:.75rem;color:var(--text-secondary)}
.cf-record{margin-top:clamp(2rem,5vh,3rem)}
.cf-record__k{color:var(--text-secondary);margin-bottom:.5rem}
.cfe__stats--rec{grid-template-columns:repeat(4,minmax(0,1fr));margin-top:0}
.cfe__stats--rec dd{font-size:clamp(1.8rem,3vw,2.5rem)}
.cfd{display:grid;gap:.375rem;margin-top:1.25rem}
.cfd__r{display:grid;grid-template-columns:6.25rem minmax(0,1fr) 2rem;align-items:center;gap:.75rem;min-height:1.75rem}
.cfd__k{color:var(--text-secondary);font-size:.6875rem}
.cfd__bar{position:relative;height:.5rem;border-bottom:1px solid var(--rule)}
.cfd__bar i{position:absolute;left:0;top:0;bottom:0;background:rgba(242,233,216,.62);transition:width .9s var(--ease-out)}
.cfd__r.is-last .cfd__bar i{background:var(--accent)}
.cfd__v{text-align:right;font-family:var(--f-display);font-size:1.125rem;font-variant-numeric:tabular-nums}
.cf-record__n{margin-top:1rem;font-size:.8125rem;color:var(--text-secondary)}
.cf-disc{margin-top:clamp(3rem,8vh,5rem);max-width:80ch;color:var(--text-secondary);text-transform:none;letter-spacing:.06em;line-height:1.7}

/* ---------- /learn/: the landing ---------- */
.lrn{border-top:1px solid var(--rule-strong)}
.lrn .nrow__head h3 a{text-decoration:none;color:inherit}
.lrn .nrow__head h3 a::after{content:"";position:absolute;inset:0}
.lrn .nrow{transition:background-color .6s var(--ease-out)}
.lrn .nrow:hover{background:rgba(242,233,216,.025)}
.lrn__go{display:inline-flex;align-items:center;gap:.75rem;margin-top:.5rem;color:var(--text-primary)}
.lrn .nrow:hover .cf-arr{transform:translateX(.25rem)}
.lrn__note{margin-top:clamp(2rem,5vh,3rem);max-width:62ch;color:var(--text-secondary)}

/* ---------- phones and tablets ---------- */
@media (max-width:960px){
  .cf__top,.cf__grid,.cfe,.cf-rules{grid-template-columns:minmax(0,1fr)}
  .cf__grid{grid-template-areas:"open" "play" "sealed";row-gap:clamp(1.75rem,4vh,2.5rem)}
  /* the plate follows the words on a phone here (the game is the point of the page), at a reading size */
  .phero__in > .hplate--cf{order:2;justify-self:center;width:min(100%,26rem)}
  .cf__top{align-items:start}
  .cf__side{max-width:26rem}
  .cf__play{position:relative;top:auto}
  .cfn__full{grid-template-columns:minmax(0,1fr)}
  .cfn__s{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:640px){
  .cfc{grid-template-columns:2.75rem minmax(0,1fr);column-gap:.875rem;padding:1.25rem 0 1.375rem}
  .cfc__n{font-size:2rem}
  .cfc.is-sealed{grid-template-columns:2.75rem minmax(0,1fr) auto}
  .cfc.is-sealed .cfc__n{font-size:1.5rem}
  .cfb__r{grid-template-columns:2.5rem minmax(0,1fr) auto;gap:.75rem}
  .cfb__m{grid-column:2;grid-row:2;margin-top:-.5rem}
  .cfb__p{grid-column:3;grid-row:1 / span 2}
  .cfa__r{grid-template-columns:3rem minmax(0,1fr) 1.5rem;align-items:start}
  .cfa__s{grid-column:2;grid-row:2;align-items:flex-start;text-align:left;flex-direction:row;flex-wrap:wrap;gap:.5rem}
  .cfa__r .cf-arr{grid-column:3;grid-row:1}
  .cfe__stats--rec{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:1.25rem}
  .cfe__seal{display:none}
  .cfn__orm{display:none}
}

/* ---------- motion gates: Motion off or reduced motion, everything lands at once ---------- */
html.still .cf *,html.still .cf *::before,html.still .cf *::after{animation:none !important;transition:none !important}
@media (prefers-reduced-motion:reduce){
  .cf *,.cf *::before,.cf *::after,.cf-sec *{animation:none !important;transition:none !important}
}

/* =====================================================================
   LEARN: ADVANCES (2026-10-15). /learn/advances/, drawn by /assets/fx/advances.js from /content/advances.json.
   The rules of this file hold: rem sizes (the laptop scale of site.css grows them), 44 px targets, html.still and reduced motion still.
   Laptops (1024 px and up): the year is a large Antonio numeral in the margin, held in view while its plates pass, and the plates hang on
   one inked spine. Phones and tablets: the year is a divider (numeral, hairline, count) and the spine runs down the left edge.
   ===================================================================== */
.adv-sec{--adv-in:1.625rem;--adv-pt:1.25rem;--adv-px:1.125rem}
.adv.loading{min-height:24rem}

/* ---------- the filter: one key per theme, the house atlas keys ---------- */
.adv-filter{display:grid;grid-template-columns:minmax(0,1fr);gap:.375rem;margin:0 0 clamp(2.5rem,6vh,4.5rem);padding:.75rem 0 .875rem;
  border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}
.adv-filter__k{color:var(--text-secondary)}
.adv-keys{display:flex;flex-wrap:wrap;gap:.375rem .5rem}
.adv-say{color:var(--text-secondary);min-height:1.5em}
.adv-key{appearance:none;display:inline-flex;align-items:center;min-height:2.75rem;margin:0;padding:0;border:0;background:none;color:var(--text-primary);
  cursor:pointer;font:inherit;-webkit-tap-highlight-color:transparent}
.adv-key__ring{flex:none;width:.875rem;height:.875rem;margin:0 .625rem 0 .125rem;border-radius:50%;border:1px solid #D0694E;background:rgba(38,32,26,.92);
  box-shadow:0 0 0 .1875rem rgba(38,32,26,.6);transition:background-color .3s var(--ease-out),border-color .3s var(--ease-out),transform .3s var(--ease-stamp)}
.adv-key__t{display:inline-flex;align-items:center;gap:.4375rem;min-height:2.75rem;padding:0 .625rem 0 .5rem;border:1px solid var(--rule);background:rgba(38,32,26,.86);
  color:var(--text-secondary);font-size:.625rem;letter-spacing:.08em;white-space:nowrap;transition:color .3s var(--ease-out),border-color .3s var(--ease-out),background-color .3s var(--ease-out)}
/* phones and tablets: the ring sits inside the key as a small dot, and the glyphs stay with the entries, so the six themes take three rows */
.adv-key__t::before{content:"";flex:none;width:.4375rem;height:.4375rem;border-radius:50%;border:1px solid #D0694E;transition:background-color .3s var(--ease-out)}
.adv-key__ring,.adv-key__t .adv-g{display:none}
.adv-key[aria-pressed="true"] .adv-key__t{background:rgba(168,67,46,.16)}
.adv-key[aria-pressed="true"] .adv-key__t::before{background:#D0694E}
.adv-key__t b{font-weight:500;color:var(--text-primary)}
.adv-key:hover .adv-key__t,.adv-key:focus-visible .adv-key__t{color:var(--text-primary);border-color:var(--rule-strong)}
.adv-key:hover .adv-key__ring{transform:scale(1.18)}
.adv-key[aria-pressed="true"] .adv-key__ring{background:#A8432E;border-color:#E08A6C}
.adv-key[aria-pressed="true"] .adv-key__t{color:var(--text-primary);border-color:#A8432E}
.adv-key:disabled{opacity:.45;cursor:default}
.adv-key:focus-visible{outline:none;box-shadow:none}
.adv-key:focus-visible .adv-key__t{outline:2px solid var(--text-primary);outline-offset:3px}
.adv-key:focus-visible .adv-key__ring{outline:2px solid var(--text-primary);outline-offset:3px}

/* the theme glyphs: small ink drawings, one stroke weight */
.adv-g{flex:none;width:.875rem;height:.875rem;overflow:visible;fill:none;stroke:currentColor}
.adv-g path,.adv-g circle{stroke-width:1;vector-effect:non-scaling-stroke;stroke-linecap:round;stroke-linejoin:round}
.adv-g .adv-g__dash{stroke-dasharray:1.5 2}

/* ---------- the year: a divider on phones and tablets ---------- */
.adv-yr + .adv-yr{margin-top:clamp(3.25rem,8vh,5rem)}
.adv-yr__mark{display:flex;align-items:center;gap:1rem;margin:0 0 1.5rem}
.adv-yr__n{font-family:var(--f-display);font-weight:300;font-size:clamp(3rem,11vw,4.5rem);line-height:.86;letter-spacing:.01em;
  font-variant-numeric:tabular-nums;color:var(--text-primary)}
.adv-yr__rule{flex:1;height:1px;background:var(--rule-strong);transform-origin:left center}
.reveal .adv-yr__rule{transform:scaleX(0);transition:transform 1.4s var(--ease-inout) .15s}
.reveal.in .adv-yr__rule{transform:none}
.adv-yr__c{flex:none;color:var(--text-secondary)}

/* ---------- the spine, its nodes and the plates ---------- */
.adv-yr__list{position:relative;padding-left:var(--adv-in)}
.adv-e{position:relative;padding-bottom:clamp(1rem,2.4vh,1.5rem)}
/* the spine: each plate inks its own length as it arrives, from the first node of its year to the last */
.adv-e::before{content:"";position:absolute;left:calc(-1 * var(--adv-in));top:0;bottom:0;width:1px;background:rgba(242,233,216,.4);transform-origin:center top}
.adv-e.is-start::before{top:calc(var(--adv-pt) + .5625rem)}
.adv-e.is-end::before{bottom:auto;height:calc(var(--adv-pt) + .5625rem)}
.adv-e.is-start.is-end::before{display:none}
.reveal.adv-e::before{transform:scaleY(0);transition:transform 1.3s var(--ease-inout)}
.reveal.adv-e.in::before{transform:none}
/* the node on the spine, with a leader to its plate; the newest shown entry carries the Sanguine target */
.adv-e__node{position:absolute;z-index:1;left:calc(-1 * var(--adv-in) - .75rem + .5px);top:calc(var(--adv-pt) + .5625rem - .75rem);width:1.5rem;height:1.5rem;pointer-events:none}
.adv-e__node svg{display:block;width:100%;height:100%;overflow:visible}
.adv-e__node circle,.adv-e__node path{fill:none;stroke-width:1;vector-effect:non-scaling-stroke}
.adv-e__node .adv-n__ring{fill:var(--canvas);stroke:rgba(242,233,216,.62);transition:stroke .5s var(--ease-out)}
.adv-e__node .adv-n__halo,.adv-e__node .adv-n__tick{stroke:var(--accent);opacity:0}
.adv-e__node .adv-n__dot{fill:var(--accent);stroke:none;opacity:0}
.adv-e__node::after{content:"";position:absolute;left:1.3125rem;top:50%;width:calc(var(--adv-in) - .5625rem);height:1px;background:var(--rule-strong)}
.adv-e:hover .adv-n__ring,.adv-e:focus-within .adv-n__ring{stroke:var(--text-primary)}
.adv-e.is-top .adv-n__ring{stroke:var(--accent)}
.adv-e.is-top .adv-n__halo,.adv-e.is-top .adv-n__tick{opacity:.9}
.adv-e.is-top .adv-n__dot{opacity:1}
.reveal.adv-e .adv-e__node{opacity:0;transform:scale(.4);transition:opacity .5s var(--ease-out) .3s,transform .7s var(--ease-stamp) .3s}
.reveal.adv-e.in .adv-e__node{opacity:1;transform:none}

.adv-e__plate{position:relative;display:grid;grid-template-columns:minmax(0,1fr);row-gap:.875rem;padding:var(--adv-pt) var(--adv-px) 1rem;
  border:1px solid rgba(242,233,216,.1);background:rgba(59,43,36,.26);transition:border-color .5s var(--ease-out),background-color .5s var(--ease-out)}
/* the plate's four Parchment corner ticks */
.adv-e__plate::after{content:"";position:absolute;inset:-1px;pointer-events:none;--k:rgba(242,233,216,.7);opacity:.7;transition:opacity .5s var(--ease-out);
  background:
    linear-gradient(var(--k),var(--k)) left top/.875rem 1px no-repeat,linear-gradient(var(--k),var(--k)) left top/1px .875rem no-repeat,
    linear-gradient(var(--k),var(--k)) right top/.875rem 1px no-repeat,linear-gradient(var(--k),var(--k)) right top/1px .875rem no-repeat,
    linear-gradient(var(--k),var(--k)) left bottom/.875rem 1px no-repeat,linear-gradient(var(--k),var(--k)) left bottom/1px .875rem no-repeat,
    linear-gradient(var(--k),var(--k)) right bottom/.875rem 1px no-repeat,linear-gradient(var(--k),var(--k)) right bottom/1px .875rem no-repeat}
.adv-e:hover .adv-e__plate,.adv-e:focus-within .adv-e__plate{border-color:rgba(242,233,216,.2);background-color:rgba(59,43,36,.4)}
.adv-e:hover .adv-e__plate::after,.adv-e:focus-within .adv-e__plate::after{opacity:1}
.adv-e.is-top .adv-e__plate{background-image:radial-gradient(110% 80% at 0% 0%,rgba(168,67,46,.13),transparent 60%)}

.adv-e__meta{display:flex;flex-wrap:wrap;align-items:center;gap:.375rem 1.125rem;min-height:1.125rem}
.adv-e__d{color:var(--text-primary)}
.adv-e__d i{font-style:normal;margin:0 .3em;opacity:.5}
.adv-tag{display:inline-flex;align-items:center;gap:.5rem;color:var(--text-secondary)}
.adv-co{display:inline-flex;align-items:center;min-height:1.5rem;padding:0 .5rem;border:1px dashed var(--rule-strong);color:var(--text-primary);font-size:.625rem}
.adv-e__t{margin:0;font-family:var(--f-display);font-weight:400;font-size:clamp(1.375rem,2.1vw,1.875rem);line-height:1.12;letter-spacing:.05em;text-transform:uppercase;
  color:var(--text-primary);text-wrap:balance;overflow-wrap:break-word}
.adv-e__x{max-width:62ch;font-size:1rem;line-height:1.66;color:rgba(242,233,216,.86)}
.adv-e__src{display:flex;flex-wrap:wrap;gap:0 2rem;margin:.125rem 0 0;padding-top:.375rem;border-top:1px solid var(--rule)}
.adv-e__src > div{display:flex;align-items:baseline;gap:.75rem;min-width:0}
.adv-e__src dt{flex:none;color:var(--text-secondary);font-size:.6875rem}
.adv-e__src dd{margin:0;min-width:0;font-family:var(--f-mono);font-weight:400;font-size:.8125rem;line-height:1.5;letter-spacing:.03em;color:var(--text-primary);overflow-wrap:anywhere}
.adv-e__w dd{padding:.6875rem 0}
.adv-e__s dd{line-height:1.5}
.adv-e__a{display:inline-block;min-height:2.75rem;padding:.6875rem 0;margin-right:1.25rem;color:var(--text-primary);text-decoration:underline;
  text-decoration-thickness:1px;text-underline-offset:.3rem;text-decoration-color:var(--rule-strong);transition:text-decoration-color .3s var(--ease-out),color .3s var(--ease-out)}
.adv-e__a:last-child{margin-right:0}
.adv-e__a:hover{text-decoration-color:currentColor}
.adv-e__doi{color:var(--text-secondary)}
.adv-e__doi:hover{color:var(--text-primary)}
.adv-nw{white-space:nowrap}
.adv-ext{display:inline-block;vertical-align:.0625rem;width:.6875rem;height:.6875rem;margin-left:.375rem;fill:none;stroke:currentColor;stroke-width:1.1;stroke-linecap:round;stroke-linejoin:round;opacity:.8}

/* a filter pressed: the entries it shows arrive again */
html.motion-on:not(.still) .adv-e.adv-in{animation:advIn .55s var(--ease-out) both}
@keyframes advIn{from{opacity:0;transform:translateY(.75rem)}}

.adv-note{margin-top:clamp(2.5rem,6vh,4rem)}

/* ---------- laptops: the year in the margin ---------- */
@media (min-width:1024px){
  .adv-sec{--adv-in:3.25rem;--adv-pt:clamp(1.5rem,2.2vw,2.125rem);--adv-px:clamp(1.5rem,2.4vw,2.5rem)}
  .adv-filter{grid-template-columns:auto minmax(0,1fr);column-gap:1.5rem;align-items:start}
  .adv-filter__k{grid-row:1;line-height:2.75rem}
  .adv-say{grid-column:2}
  .adv-keys{gap:.125rem .875rem}
  .adv-key__ring{display:block}
  .adv-key__t{min-height:0;padding:.3125rem .5625rem;gap:.5rem;font-size:.6875rem;letter-spacing:.1em}
  .adv-key__t::before{display:none}
  .adv-key:focus-visible .adv-key__t{outline:none}
  .adv-key__t .adv-g{display:block;width:.8125rem;height:.8125rem}
  .adv-key[aria-pressed="true"] .adv-key__t{background:rgba(38,32,26,.86)}
  .adv-yr{display:grid;grid-template-columns:minmax(0,13.5rem) minmax(0,1fr);column-gap:clamp(1rem,2.5vw,2.5rem);align-items:start}
  .adv-yr + .adv-yr{margin-top:0}
  .adv-yr__list{padding-bottom:clamp(3.5rem,9vh,6rem)}
  .adv-yr.is-last .adv-yr__list{padding-bottom:0}
  .adv-yr__mark{position:sticky;top:calc(var(--hdr-h) + 2rem);display:grid;justify-items:start;gap:1.125rem;margin:0;padding-top:calc(var(--adv-pt) - .25rem)}
  .adv-yr__n{font-size:clamp(4.25rem,6.4vw,7.25rem)}
  .adv-yr__rule{display:none}
  .adv-e__plate{padding-bottom:1.125rem}
}
/* wide laptops: the title beside its two sentences */
@media (min-width:1200px){
  .adv-e__plate{grid-template-columns:minmax(0,5fr) minmax(0,6fr);grid-template-areas:"meta meta" "t x" "src src";column-gap:clamp(1.5rem,3vw,3.25rem);row-gap:1rem}
  .adv-e__meta{grid-area:meta}
  .adv-e__t{grid-area:t}
  .adv-e__x{grid-area:x}
  .adv-e__src{grid-area:src}
}
/* the hero plate follows the words below 960 px, as on the other Learn pages */
@media (max-width:960px){
  .phero__in > .hplate--adv{order:2;justify-self:center;width:min(100%,26rem)}
}
@media (max-width:640px){
  .adv-yr__n{font-size:3.25rem}
  .adv-e__x{line-height:1.6}
  /* where and the source read as one flowing line each, so a long source or DOI has the plate's full measure */
  .adv-e__src{display:block;padding-top:.5rem}
  .adv-e__src > div{display:block}
  .adv-e__src dt{display:inline;margin-right:.625rem}
  .adv-e__src dd{display:inline}
  .adv-e__w{padding:.25rem 0 .125rem}
  .adv-e__w dd{padding:0}
  .adv-e__t{font-size:1.375rem;line-height:1.14}
}

/* ---------- motion gates: Motion off or reduced motion, the page is complete at once ---------- */
html.still .adv-e::before,html.still .adv-e__node,html.still .adv-yr__rule{transition:none !important;transform:none !important}
html.still .adv-e__node{opacity:1 !important}
html.still .adv-e{animation:none !important}
@media (prefers-reduced-motion:reduce){
  .adv-e::before,.adv-e__node,.adv-yr__rule{transition:none !important;transform:none !important}
  .adv-e__node{opacity:1 !important}
  .adv-e{animation:none !important}
}
/* END LEARN: ADVANCES */

/* =====================================================================
   LEARN: ATLAS (2026-10-15). /learn/atlas/, THE TRANSPLANT ATLAS: the specimen table in the hero, then one chapter per organ, the plate
   beside the donor's and the recipient's steps (assets/fx/atlas.js washes each step's part; the washes are the Research atlas's .gx-w).
   The rules of this file hold: rem sizes (the laptop scale of site.css grows them), 44 px targets, html.still and reduced motion still.
   Laptops (900 px and up): the plate stays in view beside the steps. Phones and portrait tablets: the plate at the top of its chapter, its
   labels as a row of chips under it, and a docked mini plate under the header while the steps pass.
   ===================================================================== */
/* the two new plates use the line weights of the heart and the liver (work.nosync/atlas/spec.md) */
.gx-kidney .v,.gx-pancreas .v{stroke:rgba(242,233,216,.3)}
.gx-kidney .gx-ol,.gx-pancreas .gx-ol{stroke:rgba(242,233,216,.78)}
.gx-kidney .gx-thin,.gx-pancreas .gx-thin{stroke:rgba(242,233,216,.4)}
.gx-kidney .gx-hA,.gx-pancreas .gx-hA{stroke:rgba(242,233,216,.2)}
.gx-kidney .gx-hB,.gx-pancreas .gx-hB{stroke:rgba(242,233,216,.17)}
.gx-kidney .gx-hC,.gx-pancreas .gx-hC{stroke:rgba(242,233,216,.15)}
.gx-kidney .gx-vr,.gx-pancreas .gx-vr{stroke:rgba(242,233,216,.34);stroke-dasharray:4 3}
.gx-kidney .gx-sn,.gx-pancreas .gx-sn{font-size:0.5625rem;letter-spacing:.08em;fill:rgba(242,233,216,.42)}
.gx-kidney .gx-vn,.gx-pancreas .gx-vn{font-size:0.5rem;fill:rgba(242,233,216,.38)}
.gx-kidney .gx-ldr,.gx-pancreas .gx-ldr{stroke:rgba(242,233,216,.22);transition:stroke .35s var(--ease-out)}
.gx-kidney .gx-ldr.is-hot,.gx-pancreas .gx-ldr.is-hot{stroke:rgba(224,138,108,.95)}
.gx-kidney .gx-dot,.gx-pancreas .gx-dot{fill:rgba(38,32,26,.9);transition:fill .35s var(--ease-out)}
.gx-kidney .gx-dot.is-hot,.gx-pancreas .gx-dot.is-hot{fill:#E08A6C}
/* the lungs' transplant plate: the faint pulmonary arteries and atrial cuffs (dash-dot, as the heart's left atrial cuff) */
.lstudy .gx-pa,.lstudy .gx-la{stroke:rgba(242,233,216,.28)}
/* a chapter's washes are composited layers only while it is on screen (fx/atlas.js play/pause), so five plates never hold them at once */
.ax-ch .gx-w{will-change:auto}
.ax-ch.ax-on .gx-w{will-change:opacity}
/* a join with no region of its own: a soft Sanguine halo under its dotted cut line */
.gx-w path.ax-halo{fill:none;stroke:#A8432E;stroke-width:13;stroke-linecap:round;stroke-linejoin:round;opacity:.42}
/* a join behind the organ (the heart's left atrial cuff): the Research atlas's finer, fainter cut (.gx-cut--behind, site.css) and a fainter halo */
.gx-w path.ax-halo.ax-hid{opacity:.2}
.ax-dock__w .gx-cut.gx-cut--behind{stroke-width:6;opacity:.55}

/* ---------- the hero ---------- */
.ax-hero{min-height:0;padding-top:calc(var(--hdr-h) + clamp(1.75rem,6vh,4.5rem));padding-bottom:clamp(2.5rem,7vh,5rem)}
.ax-hero__in{max-width:68rem}
.ax-hero .ax-hero__t{max-width:none;font-size:clamp(2.6rem,5.2vw,5.5rem);text-wrap:balance}
.ax-hero .phero__lede{max-width:62ch}
/* laptops: the title and the lede on the left, THE BODY beside them */
@media (min-width:1024px){
  .ax-hero__in{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);grid-template-rows:auto auto 1fr;column-gap:clamp(2rem,5vw,5rem);align-items:end;max-width:none}
  .ax-hero__in > .phero__eye,.ax-hero__in > .ax-hero__t{grid-column:1}
  .ax-hero__in > .phero__lede{grid-column:1;grid-row:3;align-self:start;margin:1.25rem 0 0;font-size:clamp(1rem,1.15vw,1.1875rem)}
  .ax-hero__in > .ax-body{grid-column:2;grid-row:1 / span 3;align-self:center;margin:0}
}
.ax-help{margin-top:clamp(1.25rem,3vh,2rem);color:var(--text-secondary);font-size:.6875rem;letter-spacing:.12em;text-align:center}

/* ---------- THE SPECIMEN TABLE: five plates in a row; three and two on tablets; two, two and one on phones ---------- */
.ax-table{--g:clamp(.75rem,1.5vw,1.5rem);display:flex;flex-wrap:wrap;justify-content:center;gap:clamp(1.25rem,3vh,2rem) var(--g);margin:clamp(2rem,5vh,3.5rem) 0 0;padding:0;list-style:none}
.ax-spec__i{flex:0 0 calc((100% - 4 * var(--g)) / 5);min-width:0}
.ax-spec{display:block;color:var(--text-primary);text-decoration:none;-webkit-tap-highlight-color:transparent}
.ax-spec__fig{position:relative;display:block;aspect-ratio:400/380;background:rgba(38,32,26,.5);border:1px solid rgba(242,233,216,.1);overflow:hidden;
  transition:border-color .5s var(--ease-out),background-color .5s var(--ease-out)}
.ax-spec__fig::after,.ax-plate__frame::after{content:"";position:absolute;inset:-1px;z-index:3;pointer-events:none;--k:rgba(242,233,216,.72);
  background:
    linear-gradient(var(--k),var(--k)) left top/.875rem 1px no-repeat,linear-gradient(var(--k),var(--k)) left top/1px .875rem no-repeat,
    linear-gradient(var(--k),var(--k)) right top/.875rem 1px no-repeat,linear-gradient(var(--k),var(--k)) right top/1px .875rem no-repeat,
    linear-gradient(var(--k),var(--k)) left bottom/.875rem 1px no-repeat,linear-gradient(var(--k),var(--k)) left bottom/1px .875rem no-repeat,
    linear-gradient(var(--k),var(--k)) right bottom/.875rem 1px no-repeat,linear-gradient(var(--k),var(--k)) right bottom/1px .875rem no-repeat}
.ax-spec__svg{position:absolute;inset:0;width:100%;height:100%}
.ax-spec__fig--gl img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain}
html.fx .ax-spec__fig--gl:not(.inkgl-still):not(.fx-off) img{visibility:hidden}
.ax-spec__fig--front .inkgl__c{pointer-events:none}                 /* the heart is shown from the front only: no turning by hand */
.ax-spec__cap{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:baseline;column-gap:.75rem;padding:.75rem .125rem 0;min-height:2.75rem}
.ax-spec__k{color:var(--text-secondary);font-size:.625rem}
.ax-spec__t{font-family:var(--f-display);font-weight:400;font-size:clamp(1.0625rem,1.35vw,1.375rem);line-height:1.1;letter-spacing:.06em;text-transform:uppercase}
.ax-spec__a{align-self:center;width:1.125rem;height:1.125rem;fill:none;stroke:var(--text-secondary);stroke-width:1.25;stroke-linecap:round;stroke-linejoin:round;
  transition:transform .5s var(--ease-out),stroke .3s var(--ease-out)}
.ax-spec:hover .ax-spec__fig,.ax-spec:focus-visible .ax-spec__fig{border-color:rgba(242,233,216,.26);background-color:rgba(59,43,36,.42)}
.ax-spec:hover .ax-spec__a,.ax-spec:focus-visible .ax-spec__a{transform:translateY(.1875rem);stroke:#E08A6C}
.ax-spec:focus-visible{outline:none}
.ax-spec:focus-visible .ax-spec__fig{outline:1px solid var(--text-primary);outline-offset:3px}

/* ---------- one chapter ---------- */
.ax-ch{padding-top:clamp(4.5rem,11vh,8.5rem);padding-bottom:clamp(2.5rem,6vh,4.5rem)}
.ax-ch + .ax-ch{border-top:1px solid var(--rule)}
.ax-ch__grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);column-gap:clamp(2rem,4.6vw,5rem);align-items:start}
.ax-ch__side{position:sticky;top:calc(var(--hdr-h) + 1.5rem);display:grid;gap:.625rem;justify-items:start}
.ax-plate{position:relative;width:min(100%,calc((100vh - var(--hdr-h) - 14rem) * 1.0526));width:min(100%,calc((100svh - var(--hdr-h) - 14rem) * 1.0526));margin:0;container:axp/inline-size}
.ax-plate__frame{position:relative;aspect-ratio:400/380;background:rgba(38,32,26,.5);border:1px solid rgba(242,233,216,.08)}
.ax-wv{position:absolute;inset:0;z-index:0;pointer-events:none}
.ax-plate__svg{position:absolute;inset:0;z-index:1;width:100%;height:100%}
.ax-keys{position:absolute;left:0;right:0;top:0;z-index:4;aspect-ratio:400/380;pointer-events:none}
.ax-key{position:absolute;top:calc(var(--ky) - 22px);display:flex;align-items:center;min-height:44px;margin:0;padding:0;border:0;background:none;color:var(--text-primary);
  font:inherit;cursor:pointer;pointer-events:auto;-webkit-tap-highlight-color:transparent}
.ax-key--l{left:calc(5.5% - 22px)}
.ax-key--r{right:calc(5.5% - 22px);flex-direction:row-reverse}
.ax-key__ring{flex:none;width:.875rem;height:.875rem;margin:15px;border-radius:50%;border:1px solid #D0694E;background:rgba(38,32,26,.92);box-shadow:0 0 0 3px rgba(38,32,26,.6);
  transition:background-color .3s var(--ease-out),transform .3s var(--ease-out)}
.ax-key__t{padding:.25rem .5rem;border:1px solid var(--rule);background:rgba(38,32,26,.86);color:var(--text-secondary);font-size:.625rem;letter-spacing:.12em;white-space:nowrap;
  transition:color .3s var(--ease-out),border-color .3s var(--ease-out)}
.ax-key:hover .ax-key__t,.ax-key:focus-visible .ax-key__t,.ax-key.is-hot .ax-key__t{color:var(--text-primary);border-color:#A8432E}
.ax-key:hover .ax-key__ring,.ax-key.is-hot .ax-key__ring{transform:scale(1.18);background:rgba(168,67,46,.55)}
.ax-key[aria-pressed="true"] .ax-key__ring{background:#A8432E;border-color:#E08A6C}
.ax-key:focus-visible{outline:none}
.ax-key:focus-visible .ax-key__ring{outline:2px solid var(--text-primary);outline-offset:3px}
.ax-plate__cap{display:block;margin-top:.625rem;color:var(--text-secondary);font-size:.6875rem}
.ax-say{min-height:1.2em;margin:0;color:#E08A6C;font-size:.6875rem;letter-spacing:.12em}
/* a narrow plate (phones, small tablets): the drawing takes the plate and the labels sit under it as chips; no leaders */
@container axp (max-width:460px){
  .ax-keys{position:static;aspect-ratio:auto;display:flex;flex-wrap:wrap;gap:0 .375rem;margin-top:.375rem;pointer-events:auto}
  .ax-key,.ax-key--l,.ax-key--r{position:relative;left:auto;right:auto;top:auto;flex-direction:row}
  .ax-key__ring{margin:15px .5rem 15px .25rem}
  .ax-plate .gx-ldr{display:none}
  .ax-plate .gx-dot{r:3.4px}
}

/* the words beside the plate */
.ax-ch__main{min-width:0}
.ax-head{display:grid;gap:1rem;justify-items:start}
.ax-kick{display:flex;align-items:center;gap:.875rem;color:var(--text-secondary)}
.ax-kick::before{content:"";width:1.75rem;height:1px;background:var(--accent)}
.ax-ch__t{margin:0;font-family:var(--f-display);font-weight:400;font-size:clamp(2rem,3.5vw,3.5rem);line-height:1.04;letter-spacing:.05em;text-transform:uppercase;
  color:var(--text-primary);text-wrap:balance}
.ax-intro{max-width:60ch;font-size:clamp(1.0625rem,1.2vw,1.1875rem);line-height:1.66;color:rgba(242,233,216,.86)}
.ax-steps{margin-top:clamp(2rem,5vh,3rem)}
.ax-steps__h{display:flex;align-items:center;gap:.875rem;margin:clamp(2rem,5vh,3rem) 0 .5rem;color:var(--text-primary);font-size:.75rem}
.ax-steps__h:first-child{margin-top:0}
.ax-steps__h::after{content:"";flex:1;height:1px;background:var(--rule-strong)}
.ax-list{list-style:none;margin:0;padding:0}
.ax-step{position:relative;padding:clamp(1.25rem,3.6vh,2.25rem) 0;border-top:1px solid var(--rule)}
.ax-step:first-child{border-top:0}
.ax-step::before{content:"";position:absolute;left:0;right:0;top:-1px;height:1px;background:linear-gradient(90deg,#D0694E,rgba(168,67,46,0));transform:scaleX(0);transform-origin:0 50%;
  transition:transform .8s var(--ease-out)}
.ax-step.is-on::before{transform:none}
.ax-step:first-child::before{top:0}
.ax-step__b{display:grid;grid-template-columns:3rem minmax(0,1fr) auto;align-items:baseline;width:100%;min-height:44px;margin:0;padding:0;border:0;background:none;
  color:var(--text-primary);font:inherit;text-align:left;cursor:pointer;-webkit-tap-highlight-color:transparent}
.ax-step__b:disabled{cursor:default}
.ax-step__n{color:var(--text-secondary);font-size:.75rem;transition:color .4s var(--ease-out)}
.ax-step__t{font-family:var(--f-display);font-weight:400;font-size:clamp(1.25rem,1.75vw,1.625rem);line-height:1.14;letter-spacing:.05em;text-transform:uppercase;
  transition:color .4s var(--ease-out)}
.ax-step__o{align-self:center;width:.75rem;height:.75rem;margin-left:1rem;border-radius:50%;border:1px solid rgba(208,105,78,.75);
  transition:background-color .4s var(--ease-out),transform .4s var(--ease-out)}
.ax-step__b:disabled .ax-step__o{visibility:hidden}
.ax-step__b:hover .ax-step__o,.ax-step__b:focus-visible .ax-step__o{transform:scale(1.25)}
.ax-step__b:focus-visible{outline:none}
.ax-step__b:focus-visible .ax-step__t{text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:.3em;text-decoration-color:#E08A6C}
.ax-step.is-on .ax-step__n{color:#E08A6C}
.ax-step.is-on .ax-step__o{background:#A8432E;border-color:#E08A6C}
.ax-step__x{margin:.625rem 0 0 3rem;max-width:58ch;font-size:1rem;line-height:1.66;color:rgba(242,233,216,.8)}
.ax-cite{margin-left:.15em;font-family:var(--f-mono);font-size:.68em;line-height:0;letter-spacing:.02em;vertical-align:super;white-space:nowrap}
.ax-cite a{color:#E08A6C;text-decoration:none;padding:0 .08em}
.ax-cite a:hover{text-decoration:underline}
.ax-cite span{color:var(--text-secondary)}
.ax-lab{margin:0 0 .625rem;color:var(--text-secondary);font-size:.6875rem}
/* the robotic note: a small plate with corner ticks */
.ax-robo{position:relative;margin-top:clamp(2.25rem,5vh,3.25rem);padding:1.25rem 1.375rem 1.375rem;border:1px solid rgba(242,233,216,.1);background:rgba(59,43,36,.26)}
.ax-robo::after{content:"";position:absolute;inset:-1px;pointer-events:none;--k:rgba(242,233,216,.6);
  background:
    linear-gradient(var(--k),var(--k)) left top/.875rem 1px no-repeat,linear-gradient(var(--k),var(--k)) left top/1px .875rem no-repeat,
    linear-gradient(var(--k),var(--k)) right bottom/.875rem 1px no-repeat,linear-gradient(var(--k),var(--k)) right bottom/1px .875rem no-repeat}
.ax-robo .ax-lab{color:#E08A6C}
.ax-robo p:last-child,.ax-var p:last-child{max-width:62ch;line-height:1.66;color:rgba(242,233,216,.86)}
.ax-var{margin-top:1.5rem;padding:.25rem 0 .25rem 1.375rem;border-left:1px dashed var(--rule-strong)}
/* where our advisors publish: the Research page's plate for this organ, with the live count */
.ax-papers{position:relative;display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;column-gap:1rem;margin-top:clamp(2rem,5vh,3rem);padding:1.125rem 0;
  border-top:1px solid var(--rule-strong);border-bottom:1px solid var(--rule-strong);color:var(--text-primary);text-decoration:none}
.ax-papers[hidden]{display:none}
.ax-papers .ax-lab{grid-column:1;margin-bottom:.375rem}
.ax-papers__t{grid-column:1;max-width:52ch;line-height:1.5}
.ax-papers__n{grid-column:1;margin-top:.375rem;color:#E08A6C;font-size:.6875rem}
.ax-papers__a{grid-column:2;grid-row:1 / span 3;width:1.5rem;height:1.5rem;fill:none;stroke:var(--text-primary);stroke-width:1.25;stroke-linecap:round;stroke-linejoin:round;
  transition:transform .5s var(--ease-out)}
.ax-papers:hover .ax-papers__a,.ax-papers:focus-visible .ax-papers__a{transform:translateX(.25rem)}
/* the sources */
.ax-src{margin-top:clamp(2rem,5vh,3rem)}
.ax-src__l{display:grid;gap:.5rem;margin:0;padding:0;list-style:none}
.ax-src__l li{display:grid;grid-template-columns:1.75rem minmax(0,1fr);column-gap:.5rem;font-size:.8125rem;line-height:1.55;color:var(--text-secondary);scroll-margin-top:calc(var(--hdr-h) + 6rem)}
.ax-src__l li:target .ax-src__t{color:var(--text-primary)}
.ax-src__n{color:#E08A6C;font-size:.6875rem;line-height:1.9}
.ax-src__t{overflow-wrap:anywhere}
.ax-src__a{display:inline-flex;align-items:center;min-height:1.75rem;color:var(--text-primary);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:.25rem;
  text-decoration-color:var(--rule-strong);overflow-wrap:anywhere}
.ax-src__a:hover{text-decoration-color:currentColor}
.ax-ext{display:inline-block;flex:none;width:.6875rem;height:.6875rem;margin-left:.375rem;fill:none;stroke:currentColor;stroke-width:1.1;stroke-linecap:round;stroke-linejoin:round;opacity:.8}
.ax-close__row{margin-top:clamp(1.5rem,4vh,2.5rem)}

/* ---------- the docked mini plate (phones and portrait tablets) ---------- */
.ax-dock{position:fixed;left:0;right:0;top:var(--hdr-h);z-index:45;display:grid;grid-template-columns:4.75rem minmax(0,1fr) auto 1.5rem;align-items:center;column-gap:.75rem;
  height:4.75rem;margin:0;padding:.375rem var(--gutter) .375rem calc(var(--gutter) - .375rem);border:0;border-bottom:1px solid var(--rule-strong);background:#26201A;
  color:var(--text-primary);font:inherit;text-align:left;cursor:pointer;transform:translate3d(0,-110%,0);opacity:0;pointer-events:none;
  transition:transform .45s var(--ease-out),opacity .3s var(--ease-out);-webkit-tap-highlight-color:transparent}
.ax-dock.is-on{transform:none;opacity:1;pointer-events:auto}
.ax-dock__fig{position:relative;height:100%;aspect-ratio:400/380}
.ax-dock__fig svg{position:absolute;inset:0;width:100%;height:100%;overflow:visible}
.ax-dock__l{fill:none;stroke:rgba(242,233,216,.72);stroke-width:7;stroke-linejoin:round}
.ax-dock__c path{fill:none;stroke:rgba(242,233,216,.3);stroke-width:4;stroke-linejoin:round}
.ax-dock__w .ax-halo{fill:none;stroke:#A8432E;stroke-width:30;stroke-linecap:round;stroke-linejoin:round;opacity:.65}
.ax-dock__w path{fill:#A8432E;stroke:none}
.ax-dock__w .gx-cut{fill:none;stroke:#E08A6C;stroke-width:12;stroke-linecap:round}
.ax-dock__w{opacity:0;transition:opacity .35s var(--ease-out)}
.ax-dock__w.is-lit{opacity:.9}
.ax-dock__t{display:grid;gap:.25rem;min-width:0}
.ax-dock__k{color:var(--text-secondary);font-size:.625rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ax-dock__a{font-family:var(--f-display);font-size:1.125rem;line-height:1.1;letter-spacing:.05em;text-transform:uppercase;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ax-dock__n{color:#E08A6C;font-size:.625rem;white-space:nowrap}
.ax-dock__up{width:1.25rem;height:1.25rem;fill:none;stroke:var(--text-primary);stroke-width:1.25;stroke-linecap:round;stroke-linejoin:round}

/* ---------- tablets and phones ---------- */
@media (max-width:1023px){
  .ax-spec__i{flex-basis:calc((100% - 2 * var(--g)) / 3)}
}
@media (max-width:899px){
  .ax-ch__grid{grid-template-columns:minmax(0,1fr);row-gap:clamp(1.75rem,4vh,2.5rem)}
  .ax-ch__side{position:relative;top:auto;justify-items:stretch}
  .ax-plate{width:100%;max-width:34rem;justify-self:center}
}
@media (max-width:599px){
  .ax-table{--g:.75rem}
  .ax-spec__i{flex-basis:calc((100% - var(--g)) / 2)}
  .ax-spec__cap{grid-template-columns:minmax(0,1fr) auto;row-gap:.125rem}
  .ax-spec__k{grid-column:1;grid-row:1}
  .ax-spec__t{grid-column:1;grid-row:2}
  .ax-spec__a{grid-column:2;grid-row:1 / span 2}
  .ax-step__b{grid-template-columns:2.25rem minmax(0,1fr) auto}
  .ax-step__x{margin-left:2.25rem;line-height:1.6}
  .ax-help{text-align:left}
  .ax-src__l li{grid-template-columns:1.5rem minmax(0,1fr)}
}

/* ---------- motion gates: Motion off or reduced motion, the page is complete at once ---------- */
html.still .ax-step::before,html.still .ax-step__o,html.still .ax-step__n,html.still .ax-key__ring,html.still .ax-spec__a,html.still .ax-papers__a{transition:none !important}
html.still .ax-dock{display:none}
@media (prefers-reduced-motion:reduce){
  .ax-step::before,.ax-step__o,.ax-step__n,.ax-key__ring,.ax-spec__a,.ax-papers__a,.ax-dock{transition:none !important}
}
@media (forced-colors:active){.ax-dock__w,.ax-step::before{display:none}}
/* ---------- V2 (2026-10-16): THE BODY, the two layers, YOU ARE HERE, the 3D face (work.nosync/atlas/page3d/NOTES.md) ---------- */
/* THE BODY: the landing picker */
.ax-body{margin-top:clamp(1.75rem,4vh,2.5rem)}
.ax-body__fig{display:grid;justify-items:center;margin:0}
.ax-body__frame{position:relative;width:min(100%,26rem,calc(68svh * .8));aspect-ratio:400/500}
.ax-body__svg{position:absolute;inset:0;width:100%;height:100%;overflow:visible}
.ax-body .lstudy path.ax-body__pf{fill:#26201A;stroke:none}
.ax-body .lstudy path.ax-body__w{fill:#A8432E;stroke:none;opacity:0;transition:opacity .3s var(--ease-out)}
.ax-body .lstudy .gx-beh{stroke:rgba(242,233,216,.55);stroke-dasharray:5 3}
.ax-body .lstudy .gx-ol,.ax-body .lstudy .gx-beh{transition:stroke .3s var(--ease-out)}
.ax-body__o{cursor:pointer;outline:none}
.ax-body .ax-body__o.is-on path.ax-body__w{opacity:.36}
.ax-body .ax-body__o.is-on .gx-ol,.ax-body .ax-body__o.is-on .gx-beh{stroke:#E08A6C}
.ax-body .ax-body__o:focus-visible path.ax-body__w{opacity:.36;stroke:var(--text-primary);stroke-width:2}
.ax-body__tip{position:absolute;z-index:2;display:grid;gap:.125rem;margin:0;padding:.5rem .75rem;border:1px solid #A8432E;background:rgba(38,32,26,.94);white-space:nowrap;
  pointer-events:none;transform:translate(-50%,calc(-100% - 10px));opacity:0;transition:opacity .2s var(--ease-out)}
.ax-body__tip.is-on{opacity:1}
.ax-body__tk{color:#E08A6C;font-size:.625rem;letter-spacing:.12em}
.ax-body__tn{font-family:var(--f-display);font-size:1.25rem;line-height:1.1;letter-spacing:.05em;text-transform:uppercase;color:var(--text-primary)}
.ax-body__tg{color:var(--text-secondary);font-size:.625rem;letter-spacing:.12em}
.ax-body__cap{margin-top:.75rem;color:var(--text-secondary);font-size:.6875rem;text-align:center}
.ax-body__list{display:grid;margin:1.25rem 0 0;padding:0;list-style:none;border-top:1px solid var(--rule)}
.ax-body__a{display:grid;grid-template-columns:4.75rem minmax(0,1fr) auto 1.125rem;align-items:center;column-gap:.75rem;min-height:48px;padding:.25rem 0;
  border-bottom:1px solid var(--rule);color:var(--text-primary);text-decoration:none;-webkit-tap-highlight-color:transparent}
.ax-body__ln{color:var(--text-secondary);font-size:.625rem}
.ax-body__lt{font-family:var(--f-display);font-size:1.125rem;letter-spacing:.05em;text-transform:uppercase;transition:color .3s var(--ease-out)}
.ax-body__lg{color:#E08A6C;font-size:.5625rem;letter-spacing:.12em}
.ax-body__la{width:1.125rem;height:1.125rem;fill:none;stroke:var(--text-primary);stroke-width:1.25;stroke-linecap:round;stroke-linejoin:round}
.ax-body__a:hover .ax-body__lt,.ax-body__a.is-on .ax-body__lt{color:#E08A6C}
.ax-body__a:focus-visible{outline:1px solid var(--text-primary);outline-offset:2px}
@media (min-width:900px){.ax-body__list{display:none}}
@media (max-width:1023px){.ax-body{margin-top:clamp(1.5rem,4vh,2.25rem)}}

/* the two layers and each step's reasoning */
.ax-layers{display:flex;flex-wrap:wrap;gap:0 1.5rem}
.ax-layers a{display:inline-flex;align-items:center;gap:.5rem;min-height:44px;color:var(--text-primary);font-size:.6875rem;letter-spacing:.12em;text-transform:uppercase;text-decoration:none;
  border-bottom:1px solid transparent;transition:border-color .3s var(--ease-out)}
.ax-layers a:hover,.ax-layers a:focus-visible{border-bottom-color:#E08A6C;outline:none}
.ax-layers__n{color:#E08A6C}
.ax-layer{scroll-margin-top:calc(var(--hdr-h) + 1.5rem)}
.ax-layer + .ax-layer{margin-top:clamp(3rem,8vh,5rem)}
.ax-layer__h{display:flex;align-items:baseline;flex-wrap:wrap;gap:.25rem 1rem;margin:0 0 1rem;font-family:var(--f-display);font-weight:400;font-size:clamp(1.5rem,2.4vw,2.25rem);
  line-height:1.05;letter-spacing:.05em;text-transform:uppercase;color:var(--text-primary)}
.ax-layer__n{color:#E08A6C;font-size:.6875rem;letter-spacing:.12em}
.ax-layer__lede{max-width:60ch;margin:0 0 1rem;font-size:1.0625rem;line-height:1.66;color:rgba(242,233,216,.86)}
.ax-layer .ax-steps__h{margin-top:clamp(1.75rem,4vh,2.5rem)}
.ax-why{display:grid;gap:.5rem;max-width:58ch;margin:.875rem 0 0 3rem}
.ax-why__r{display:grid;grid-template-columns:6.25rem minmax(0,1fr);column-gap:.75rem;padding-top:.5rem;border-top:1px dashed var(--rule)}
.ax-why__k{margin:0;color:#E08A6C;font-size:.625rem;line-height:2.3;letter-spacing:.12em;text-transform:uppercase}
.ax-why__v{margin:0;font-size:.9375rem;line-height:1.6;color:rgba(242,233,216,.8)}
.ax-step__s{display:flex;flex-wrap:wrap;align-items:center;gap:.375rem;margin:.75rem 0 0 3rem;color:var(--text-secondary);font-size:.625rem;letter-spacing:.12em}
.ax-step__sl{margin-right:.25rem;text-transform:uppercase}
.ax-step__s a{display:inline-grid;place-items:center;min-width:1.875rem;min-height:1.875rem;padding:0 .25rem;border:1px solid var(--rule-strong);color:#E08A6C;text-decoration:none}
.ax-step__s a:hover,.ax-step__s a:focus-visible{border-color:#E08A6C;color:var(--text-primary);outline:none}
.ax-pearls{margin-top:clamp(1.5rem,4vh,2.25rem);padding:1rem 1.25rem 1.125rem;border:1px solid rgba(242,233,216,.1);background:rgba(59,43,36,.26)}
.ax-pearls .ax-lab{color:#E08A6C}
.ax-pearls__l{display:grid;gap:.5rem;margin:0;padding-left:1.1rem;line-height:1.6;color:rgba(242,233,216,.86)}
.ax-src--v2 .ax-lab{display:flex;align-items:center;gap:.5rem}
.ax-src__c{color:#E08A6C}
.ax-src__k{display:inline-block;margin-right:.25rem;padding:0 .375rem;border:1px solid var(--rule-strong);color:var(--text-secondary);font-family:var(--f-mono);font-size:.5625rem;
  letter-spacing:.12em;text-transform:uppercase;vertical-align:.1em}
.ax-src--v2 .ax-src__l li:target{background:rgba(168,67,46,.16)}

/* YOU ARE HERE: above the plate, with a leader to the part; the label of that part lit */
.ax-hud{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:end;column-gap:1rem;min-height:5rem;
  width:min(100%,calc((100vh - var(--hdr-h) - 14rem) * 1.0526));width:min(100%,calc((100svh - var(--hdr-h) - 14rem) * 1.0526))}
.ax-hud__in{display:grid;gap:.1875rem;min-width:0;opacity:0;transition:opacity .35s var(--ease-out)}
.ax-hud.is-on .ax-hud__in{opacity:1}
.ax-hud__k,.ax-hud__l,.ax-hud__t,.ax-hud__w{margin:0;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ax-hud__k{color:var(--text-secondary);font-size:.625rem;letter-spacing:.12em}
.ax-hud__l{display:flex;gap:.75rem;color:#E08A6C;font-size:.625rem;letter-spacing:.12em}
.ax-hud__n{color:var(--text-primary)}
.ax-hud__t{font-family:var(--f-display);font-size:clamp(1.125rem,1.5vw,1.375rem);line-height:1.12;letter-spacing:.05em;text-transform:uppercase;color:var(--text-primary)}
.ax-hud__w{display:flex;align-items:center;gap:.5rem;color:var(--text-secondary);font-size:.625rem;letter-spacing:.12em;text-transform:uppercase}
.ax-hud__o{flex:none;width:.5rem;height:.5rem;border:1px solid var(--rule-strong);border-radius:50%}
.ax-hud.is-part .ax-hud__o{border-color:#E08A6C;background:#A8432E;box-shadow:0 0 0 3px rgba(168,67,46,.28)}
.ax-hud.is-part .ax-hud__p{color:var(--text-primary)}
.ax-lead{position:absolute;left:0;top:0;z-index:5;width:100%;height:100%;overflow:visible;pointer-events:none;opacity:0;transition:opacity .3s var(--ease-out)}
.ax-lead.is-on{opacity:1}
.ax-lead__p{fill:none;stroke:#E08A6C;stroke-width:1;stroke-dasharray:3 3;opacity:.9}
.ax-lead__e{fill:rgba(168,67,46,.35);stroke:#E08A6C;stroke-width:1.25}
.ax-key.is-hot .ax-key__t{background:rgba(168,67,46,.45);border-color:#E08A6C;color:var(--text-primary)}
.ax-key.is-hot .ax-key__ring{background:#A8432E;border-color:#E08A6C}
.ax-dock__p{color:#E08A6C;font-size:.5625rem;letter-spacing:.12em;text-transform:uppercase;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ax-dock__p:empty{display:none}

/* the faces: the drawing, and the organ in the round (fx/atlas3d.js) */
.ax-face{display:inline-flex;align-self:end;border:1px solid var(--rule-strong)}
.ax-face__b{min-height:2.25rem;margin:0;padding:0 .75rem;border:0;background:none;color:var(--text-secondary);font-size:.625rem;letter-spacing:.12em;text-transform:uppercase;cursor:pointer;
  transition:background-color .3s var(--ease-out),color .3s var(--ease-out);-webkit-tap-highlight-color:transparent}
.ax-face__b + .ax-face__b{border-left:1px solid var(--rule-strong)}
.ax-face__b[aria-pressed="true"]{background:rgba(168,67,46,.32);color:var(--text-primary)}
.ax-face__b:focus-visible{outline:1px solid var(--text-primary);outline-offset:2px}
@media (pointer:coarse){.ax-face__b{min-height:44px}}
.ax-plate__svg,.ax-wv{transition:opacity .5s var(--ease-out)}
.ax-plate.is-3d .ax-plate__svg,.ax-plate.is-3d .ax-wv{opacity:0}
.ax-plate.is-3d .ax-keys{visibility:hidden}
.ax-3d{position:absolute;inset:0;z-index:2;opacity:0;visibility:hidden;transition:opacity .5s var(--ease-out),visibility 0s linear .5s}
.ax-3d.is-on{opacity:1;visibility:visible;transition:opacity .5s var(--ease-out)}
.ax-3d--front canvas{pointer-events:none}
.ax-3d__still{position:absolute;inset:0;width:100%;height:100%;object-fit:contain}
.ax-3d__flush{position:absolute;left:0;top:0;width:46%;aspect-ratio:1;margin:-23% 0 0 -23%;border-radius:50%;background:radial-gradient(closest-side,rgba(168,67,46,.9),rgba(168,67,46,0));
  opacity:0;pointer-events:none;mix-blend-mode:screen;will-change:opacity,transform}
.ax-3d__dia{position:absolute;inset:0;width:100%;height:100%;overflow:visible;pointer-events:none;opacity:0}
.ax-3d__dia.is-on{opacity:1}
.ax-3d__dia path{fill:none;stroke:rgba(242,233,216,.42);stroke-width:1;stroke-dasharray:6 4}

@media (max-width:899px){.ax-hud{width:100%;max-width:34rem;justify-self:center}}
@media (max-width:599px){
  .ax-why,.ax-step__s{margin-left:2.25rem}
  .ax-why__r{grid-template-columns:minmax(0,1fr);row-gap:.125rem}
  .ax-hud{min-height:4.5rem}
}
/* ---------- THE ANATOMY IN 3D (2026-10-20, BodyParts3D via fx/anat3d.js; work.nosync/atlas/body/NOTES.md) ---------- */
.ax-names,.ax-b3cap[hidden],.ax-b3ui[hidden]{display:none}
.ax-b3{position:absolute;inset:0;z-index:1}
.ax-b3 canvas,.ax-3d--bp canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
.a3d__o,.a3d__m{position:absolute;inset:0;width:100%;height:100%;overflow:visible;pointer-events:none}
/* the one world (fx/anat3d.js world): a fixed canvas over the page that draws only inside the window in focus, and its overlay of pins and marks */
.a3dw{position:fixed;left:0;top:0;z-index:5;pointer-events:none;display:block}
.a3dw__o,.a3dw__m{position:fixed;left:0;top:0;width:100vw;height:100vh;height:100lvh;z-index:6;overflow:visible;pointer-events:none;transition:opacity .2s linear}
.a3dw__o .a3d__pin{position:absolute}
.a3d__pin{position:absolute;left:0;top:0;transition:opacity .3s var(--ease-out);will-change:transform}
.a3d__dot{position:absolute;left:-3px;top:-3px;width:6px;height:6px;border-radius:50%;background:var(--text-primary);box-shadow:0 0 0 2px rgba(38,32,26,.7)}
.a3d__lb{position:absolute;left:0;top:-.6em;white-space:nowrap;font:500 .625rem/1.2 var(--f-mono);letter-spacing:.1em;text-transform:uppercase;color:var(--text-primary);
  text-shadow:0 1px 2px rgba(38,32,26,.95),0 0 10px rgba(38,32,26,.9)}
.a3d__pin.is-l .a3d__lb{transform-origin:right;translate:-100% 0}
.a3d__pin.is-lit .a3d__dot,.a3d__pin.is-plate .a3d__dot{background:#E8B65C}
.a3d__pin.is-lit .a3d__lb{color:#F0C978}
.a3d__pin.is-plate .a3d__lb{font-size:.6875rem;color:#F2E9D8}
.a3dw__o .a3d__pin.is-plate .a3d__lb,.a3dw__o .a3d__pin.is-plate .a3d__dot{pointer-events:auto;cursor:pointer}  /* THE BODY: the gold names open their plates */
.a3dw__o .a3d__pin.is-plate .a3d__lb{padding:.375rem .25rem;margin-top:-.375rem}
.a3dw__o .a3d__pin.is-plate .a3d__dot{width:14px;height:14px;left:-7px;top:-7px;background:radial-gradient(circle,#E8B65C 0 3px,rgba(232,182,92,.18) 4px)}
.a3d__ld{fill:none;stroke:rgba(242,233,216,.5);stroke-width:1}
.a3d__ld.is-lit,.a3d__ld.is-plate{stroke:rgba(232,182,92,.75)}
.a3d__k{fill:none;stroke-linecap:round;stroke-linejoin:round}
.a3d__k.is-done{opacity:.55}
.a3d__cut{stroke:#F2E9D8;stroke-width:1.6;stroke-dasharray:6 4}
.a3d__st{stroke:#E8B65C;stroke-width:1.4}
.a3d__sx{stroke:#E8B65C;stroke-width:1.2}
.a3d__pa{stroke:rgba(242,233,216,.7);stroke-width:2.2;stroke-dasharray:2 4}
.a3d__k.is-v .a3d__pa{stroke:#7FA0D6}.a3d__k.is-a .a3d__pa{stroke:#E0705A}.a3d__k.is-d .a3d__pa{stroke:#C9C26A}
.a3d__ar{stroke:#E08A6C;stroke-width:1.8}
.a3d__rg{stroke:#E8B65C;stroke-width:1.6;fill:rgba(38,32,26,.72)}
.a3d__rn{fill:#F0C978;stroke:none;font:600 .625rem var(--f-mono);text-anchor:middle}
.a3d__cl path{stroke:#F2E9D8;stroke-width:1.6}
.a3d__mt{fill:#F2E9D8;stroke:none;font:500 .625rem var(--f-mono);letter-spacing:.06em;paint-order:stroke;stroke:rgba(38,32,26,.85);stroke-width:3px}
.a3d__mt.is-v{fill:#A9C1E8}.a3d__mt.is-a{fill:#F0A08C}.a3d__mt.is-d{fill:#DCD58A}
/* THE BODY: the figure stays beside the captions; the drawing waits underneath */
.ax-hero.is-3d{overflow:clip}                                     /* sticky needs no scroll container above it (the hero clips, as before) */
.ax-b3credit{margin:.5rem 0 0;color:var(--text-secondary);font-size:.5625rem;line-height:1.5;letter-spacing:.04em;text-align:center;opacity:.8}
.ax-b3credit a{color:inherit}
.ax-body.is-3d .ax-body__svg{opacity:0;pointer-events:none}       /* still there for the keyboard: its five links take the focus */
.ax-body.is-3d .ax-body__frame{width:100%;aspect-ratio:auto;height:min(calc(100svh - var(--hdr-h) - 7.5rem),56rem);background:radial-gradient(ellipse 60% 55% at 50% 45%,rgba(242,233,216,.05),rgba(38,32,26,0) 70%)}
.ax-body.is-3d .ax-body__tip{transform:translate(-50%,calc(-100% - 14px));pointer-events:none}
.ax-body__tip.is-name .ax-body__tk,.ax-body__tip.is-name .ax-body__tg{display:none}
.ax-body.is-3d .ax-body__cap{margin-top:.5rem}
.ax-b3ui{position:absolute;left:0;top:0;z-index:3;display:flex;flex-wrap:wrap;gap:.375rem}
.ax-b3ui__b{min-height:32px;padding:.25rem .625rem;border:1px solid rgba(242,233,216,.22);background:rgba(38,32,26,.7);color:var(--text-secondary);font:500 .625rem var(--f-mono);letter-spacing:.12em;text-transform:uppercase;cursor:pointer}
.ax-b3ui__b[aria-current="true"]{border-color:#A8432E;color:var(--text-primary);background:rgba(168,67,46,.28)}
.ax-b3ui__b:focus-visible{outline:1px solid var(--text-primary);outline-offset:2px}
.ax-b3ui__h{flex-basis:100%;margin:.125rem 0 0;color:var(--text-secondary);font:500 .5625rem var(--f-mono);letter-spacing:.12em;text-transform:uppercase}
.ax-b3cap{margin:0;padding:0;list-style:none}
.ax-b3cap__i{min-height:62vh;min-height:62svh;padding:clamp(2rem,10vh,6rem) 0 0;border-top:1px solid var(--rule)}
.ax-b3cap__k{margin:0 0 .75rem;color:#E08A6C;font-size:.6875rem;letter-spacing:.14em}
.ax-b3cap__t{margin:0;max-width:44ch;font-size:clamp(1rem,1.15vw,1.1875rem);line-height:1.6;color:var(--text-primary)}
.ax-b3cap__i:last-child{min-height:80vh;min-height:80svh}
@media (min-width:1024px){
  .ax-hero__in.is-3d{grid-template-rows:auto auto auto 1fr;align-items:start}
  .ax-hero__in.is-3d > .phero__lede{grid-row:3}
  .ax-hero__in.is-3d > .ax-body{grid-row:1 / span 4;align-self:start;position:sticky;top:calc(var(--hdr-h) + 1.25rem)}
  .ax-hero__in.is-3d > .ax-b3cap{grid-column:1;grid-row:4;margin-top:clamp(2rem,6vh,4rem)}
}
@media (max-width:1023px){
  .ax-hero__in.is-3d > .ax-body{position:sticky;top:var(--hdr-h);z-index:2;background:var(--canvas);margin-left:calc(-1 * var(--gutter));margin-right:calc(-1 * var(--gutter));padding:0 var(--gutter) .5rem}
  .ax-body.is-3d .ax-body__frame{height:min(58svh,40rem)}
  .ax-body.is-3d .ax-body__cap,.ax-body.is-3d .ax-body__list{display:none}   /* the specimen table under the hero carries the five links */
  .ax-body.is-3d .ax-b3credit{margin-top:.25rem;font-size:.5rem}
  .ax-b3cap__i{min-height:52svh;padding-top:2.5rem}
}
/* a chapter's scene: the tip names a part; the scrubber walks the steps */
.ax-3d--bp{background:rgba(38,32,26,.35)}
.ax-3d__tip{position:absolute;left:.75rem;bottom:.75rem;z-index:3;margin:0;padding:.375rem .625rem;border:1px solid #A8432E;background:rgba(38,32,26,.92);color:var(--text-primary);
  font:500 .6875rem var(--f-mono);letter-spacing:.1em;text-transform:uppercase;opacity:0;transition:opacity .25s var(--ease-out);pointer-events:none}
.ax-3d__tip.is-on{opacity:1}
.ax-scrub{display:none;align-items:center;gap:.375rem;margin-top:.625rem}
.ax-plate.is-3d .ax-scrub{display:flex}
.ax-scrub__t{display:flex;flex:1;gap:3px;margin:0;padding:0;list-style:none}
.ax-scrub__i{flex:1;min-width:0}
.ax-scrub__k{display:block;width:100%;height:32px;padding:0;border:0;background:none;cursor:pointer;position:relative}
.ax-scrub__k::before,.ax-scrub__k::after{content:"";position:absolute;left:0;right:0;top:50%;height:3px;margin-top:-1.5px}
.ax-scrub__k::before{background:rgba(242,233,216,.2)}
.ax-scrub__i[data-side="anatomy"] .ax-scrub__k::before{background:rgba(242,233,216,.12)}
.ax-scrub__k::after{background:rgba(168,67,46,.75);opacity:0;transition:opacity .3s var(--ease-out),transform .3s var(--ease-out)}   /* opacity and transform only */
.ax-scrub__i.is-past .ax-scrub__k::after{opacity:1}
.ax-scrub__k[aria-current="step"]::after{background:#E8B65C;opacity:1;transform:scaleY(1.67)}
.ax-scrub__k:focus-visible{outline:1px solid var(--text-primary);outline-offset:1px}
.ax-scrub__l{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
.ax-scrub__b{flex:0 0 auto;width:32px;height:32px;padding:0;border:1px solid rgba(242,233,216,.22);background:rgba(38,32,26,.7);cursor:pointer}
.ax-scrub__b svg{width:16px;height:16px;fill:none;stroke:var(--text-primary);stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.ax-scrub__b:focus-visible{outline:1px solid var(--text-primary);outline-offset:2px}
/* phones: a chapter in 3D keeps its scene pinned under the header while the steps pass beneath it (the drawing's dock is not needed then) */
@media (max-width:899px){
  .ax-ch__grid:has(.ax-plate.is-3d){display:block}
  .ax-ch__grid:has(.ax-plate.is-3d) > .ax-ch__side{position:sticky;top:var(--hdr-h);z-index:4;margin:0 calc(-1 * var(--gutter));padding:.5rem var(--gutter) .375rem;
    background:var(--canvas);box-shadow:0 12px 18px -10px rgba(38,32,26,.95)}
  .ax-ch__grid:has(.ax-plate.is-3d) > .ax-ch__main{margin-top:1.5rem}
  .ax-plate.is-3d .ax-plate__frame{aspect-ratio:auto;height:36svh}
  .ax-plate.is-3d .ax-scrub{margin-top:.375rem}
  .ax-plate.is-3d .ax-keys{display:none}
  .ax-ch:has(.ax-plate.is-3d) .ax-dock{display:none}
}
/* REVIEW B12: the steps' "On the plate" rows describe the drawing: hidden while the plate is in 3D */
html.ax-3d-on .ax-ch:not(.ax-ch--2d) .ax-why__r--see{display:none}
html.still .ax-why__r--see{display:revert}
html.still .ax-b3,html.still .ax-b3ui,html.still .ax-b3cap,html.still .ax-scrub{display:none}
@media (prefers-reduced-motion:reduce){.ax-b3,.ax-b3ui,.ax-b3cap,.ax-scrub{display:none}}
html.still .ax-3d,html.still .ax-face,html.still .ax-3d__flush{display:none}
html.still .ax-hud__in,html.still .ax-lead,html.still .ax-body__tip,html.still .ax-body .lstudy path.ax-body__w{transition:none}
@media (prefers-reduced-motion:reduce){
  .ax-3d,.ax-face{display:none}
  .ax-hud__in,.ax-lead,.ax-body__tip,.ax-body .lstudy path.ax-body__w,.ax-plate__svg,.ax-wv{transition:none !important}
}
@media (forced-colors:active){.ax-lead,.ax-3d__flush,.ax-body .lstudy path.ax-body__w{display:none}}
/* END LEARN: ATLAS */