:root{
  color-scheme:dark;
  --dark-water:#041514;
  --soft-aqua:#a8d8cd;
  --bone-light:#f2ead8;
  --water-black:var(--dark-water);
  --deep-water:#071f1c;
  --signal-teal:#74e7d8;
  --readable-teal:var(--soft-aqua);
  --ember:#d8733f;
  --ember-hot:#f09a5b;
  --cream:var(--bone-light);
  --paper:#ead7a5;
  --paper-light:#fff3d5;
  --paper-ink:#111814;
  --danger:#ffb3a3;
  --line:rgba(116,231,216,.26);
  --display:"Unbounded","Arial Black","Avenir Next",system-ui,sans-serif;
  --mono:"SFMono-Regular","IBM Plex Mono","Courier New",monospace;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;background:var(--water-black)}
[hidden]{display:none!important}
body{margin:0;min-height:100vh;overflow-x:hidden;color:var(--cream);background:
  radial-gradient(ellipse at 84% 5%,rgba(17,108,96,.23),transparent 34rem),
  radial-gradient(ellipse at 7% 52%,rgba(216,115,63,.11),transparent 28rem),
  linear-gradient(155deg,var(--deep-water),var(--water-black) 64%);
  font:1rem/1.65 var(--mono)}
body::before{position:fixed;inset:0;z-index:-2;content:"";opacity:.48;background:
  repeating-radial-gradient(ellipse at 52% 105%,transparent 0 34px,rgba(116,231,216,.07) 35px,transparent 37px 70px);
  mask-image:linear-gradient(to top,#000,transparent 76%)}
body::after{position:fixed;inset:0;z-index:-1;pointer-events:none;content:"";opacity:.13;background-image:
  linear-gradient(rgba(116,231,216,.1) 1px,transparent 1px),
  linear-gradient(90deg,rgba(116,231,216,.07) 1px,transparent 1px);
  background-size:56px 56px;mask-image:linear-gradient(#000,transparent 88%)}
button,input,select,textarea{font:inherit}
button,.file-button{min-height:2.9rem;border:1px solid rgba(116,231,216,.48);border-radius:.2rem;padding:.72rem 1rem;color:var(--cream);background:#0b2925;font-weight:850;cursor:pointer;text-transform:uppercase;letter-spacing:.05em}
button:hover,.file-button:hover{border-color:var(--ember-hot);color:#fff8e8;background:#193833}
button:disabled{cursor:not-allowed;opacity:.42}
input,select,textarea{width:100%;border:2px solid rgba(17,24,20,.68);border-radius:.18rem;padding:.86rem;color:var(--paper-ink);background:var(--paper-light)}
textarea{resize:vertical}
label,legend{font-weight:900}
:focus-visible{outline:.22rem solid var(--signal-teal);outline-offset:.22rem}
.skip-link{position:fixed;left:1rem;top:-6rem;z-index:100;padding:.8rem 1rem;color:var(--paper-ink);background:var(--signal-teal);font-weight:900}.skip-link:focus{top:1rem}
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.site-nav{position:sticky;top:0;z-index:20;display:flex;justify-content:space-between;gap:1rem;padding:.7rem clamp(1rem,4vw,3rem);border-bottom:1px solid var(--line);background:rgba(3,17,16,.93);backdrop-filter:blur(14px);font-size:.72rem;font-weight:850;letter-spacing:.1em}.site-nav a{color:var(--signal-teal)}.site-nav span{color:var(--readable-teal)}
.activity-shell,.relay-shell{width:min(82rem,calc(100% - 2rem));margin:auto}
.activity-hero,.relay-hero{position:relative;min-height:76vh;display:flex;flex-direction:column;justify-content:flex-end;padding:clamp(6rem,14vw,11rem) 0 clamp(3.5rem,7vw,6rem)}
.activity-hero::before,.relay-hero::before{position:absolute;right:-8%;top:12%;width:min(42vw,31rem);aspect-ratio:1;content:"";border:1px solid rgba(116,231,216,.35);border-radius:44% 56% 67% 33%/55% 38% 62% 45%;box-shadow:0 0 5rem rgba(116,231,216,.08),inset 0 0 4rem rgba(116,231,216,.04);transform:rotate(-13deg)}
.activity-hero::after,.relay-hero::after{position:absolute;right:4%;top:25%;width:min(27vw,19rem);aspect-ratio:1;content:"";border:1px dashed rgba(216,115,63,.62);border-radius:62% 38% 45% 55%;transform:rotate(29deg)}
.hero-signal{position:absolute;right:1rem;bottom:4rem;z-index:1;display:grid;gap:.5rem;text-align:right}.hero-signal span{display:block;color:rgba(168,216,205,.62);font-size:.64rem;letter-spacing:.12em}
.eyebrow,.panel-number,.signal-number{position:relative;z-index:1;margin:0;color:var(--ember-hot);font-size:.7rem;font-weight:950;letter-spacing:.18em;text-transform:uppercase}
h1,h2,h3{font-family:var(--display)}
h1{position:relative;z-index:1;max-width:13ch;margin:.7rem 0 1.2rem;font-size:clamp(3rem,8vw,7rem);font-weight:950;line-height:.91;letter-spacing:-.05em}
h1 em{color:var(--signal-teal);font-style:normal;text-shadow:0 0 1.5rem rgba(116,231,216,.22)}
.hero-copy,.relay-hero>p:not(.eyebrow){position:relative;z-index:1;max-width:48rem;color:var(--readable-teal);font-size:clamp(1rem,2vw,1.24rem)}
.recognition-scene{position:relative;display:grid;grid-template-columns:minmax(0,.85fr) minmax(22rem,1.15fr);gap:clamp(2rem,6vw,6rem);padding:clamp(2.5rem,7vw,6rem);border:1px solid var(--line);border-left:.38rem solid var(--ember);background:linear-gradient(118deg,rgba(4,27,25,.96),rgba(3,17,16,.72))}
.recognition-scene::after{position:absolute;right:1.2rem;top:1rem;content:"SIGNAL / HUMAN LEARNING / UNAUTHORIZED BY RUBRIC";color:rgba(116,231,216,.35);font-size:.58rem;letter-spacing:.11em;writing-mode:vertical-rl}
.recognition-intro h2{max-width:9ch;margin:.6rem 0 1.2rem;font-size:clamp(2.4rem,5vw,5rem);line-height:.94}
.recognition-intro>p:last-child{max-width:32rem;color:#c4d9d2;font-size:1.05rem}
.recognition-form{display:grid;align-content:start;gap:.6rem;padding:clamp(1rem,3vw,2rem);color:var(--paper-ink);background:var(--paper);box-shadow:.85rem .85rem 0 rgba(216,115,63,.32);transform:rotate(.25deg)}
.recognition-form label:not(:first-child){margin-top:.75rem}
.recognition-reveal{grid-column:1/-1;margin-top:2rem;padding:clamp(1.5rem,5vw,4rem);border-top:1px solid var(--signal-teal);background:radial-gradient(circle at 90% 0,rgba(116,231,216,.13),transparent 24rem)}
.recognition-reveal:focus{outline:none}
.reveal-line{max-width:17ch;margin:.6rem 0 2rem;color:var(--cream);font-family:var(--display);font-size:clamp(2rem,5vw,4.7rem);font-weight:950;line-height:.98}
.recognition-reveal blockquote{position:relative;margin:2rem 0;padding:1.4rem 1.5rem;border-left:.28rem solid var(--ember);color:var(--paper-ink);background:var(--paper-light);transform:rotate(-.2deg)}
.recognition-reveal blockquote::before{position:absolute;right:1rem;top:-1.2rem;content:"FOUND OBJECT";color:var(--ember);font-size:.62rem;font-weight:900;letter-spacing:.15em}
.recognition-reveal blockquote p{margin:0;font-family:var(--display);font-size:clamp(1.25rem,2.5vw,2rem);font-weight:850}
.recognition-reveal blockquote footer{margin-top:.7rem}
.ember-button{border-color:var(--ember-hot);color:#140c08;background:var(--ember-hot)}
.ember-button:hover{color:#091615;background:var(--signal-teal)}
.privacy-signal{grid-column:1/-1;margin:1.2rem 0 0;padding-top:1rem;border-top:1px dashed rgba(116,231,216,.3);color:var(--readable-teal);font-size:.78rem}.privacy-signal strong{color:var(--cream)}
.section-heading{display:grid;grid-template-columns:minmax(0,1fr) minmax(16rem,.55fr);gap:2rem;align-items:end;margin-bottom:1.8rem}.section-heading h2{margin:.35rem 0 0;font-size:clamp(2.2rem,5vw,5rem);line-height:.94}.section-heading>p,.section-heading>label{margin:0;color:var(--readable-teal)}
.learning-field{padding:clamp(6rem,12vw,11rem) 0}
.pedagogy-field{position:relative;display:grid;grid-template-columns:repeat(12,1fr);grid-auto-rows:minmax(8rem,auto);gap:1rem;list-style:none;margin:0;padding:2.5rem 0}
.pedagogy-field::before{position:absolute;inset:7% 5%;z-index:-1;content:"";border:1px solid rgba(116,231,216,.18);border-radius:50%;transform:rotate(-6deg);box-shadow:0 0 4rem rgba(116,231,216,.06)}
.pedagogy-node{min-height:15rem}.pedagogy-node:nth-child(1){grid-column:1/6}.pedagogy-node:nth-child(2){grid-column:7/12}.pedagogy-node:nth-child(3){grid-column:3/8}.pedagogy-node:nth-child(4){grid-column:8/13}.pedagogy-node:nth-child(5){grid-column:1/5}.pedagogy-node:nth-child(6){grid-column:5/10}.pedagogy-node:nth-child(7){grid-column:9/13}
.pedagogy-button{position:relative;width:100%;height:100%;display:grid;grid-template-columns:5.4rem 1fr;grid-template-rows:auto auto 1fr;column-gap:1rem;align-items:start;border:1px solid rgba(116,231,216,.3);border-radius:.25rem;padding:1rem;text-align:left;background:linear-gradient(145deg,rgba(11,47,43,.9),rgba(3,17,16,.96));box-shadow:.55rem .55rem 0 rgba(0,0,0,.4);text-transform:none;letter-spacing:0}
.pedagogy-button:hover{transform:translate(-.18rem,-.18rem);box-shadow:.8rem .8rem 0 rgba(216,115,63,.28)}
.pedagogy-button img{grid-row:1/4;width:5.2rem;height:5.2rem;object-fit:contain;padding:.45rem;border:1px solid rgba(216,115,63,.5);background:#061b18}
.pedagogy-button strong{color:var(--signal-teal);font-family:var(--display);font-size:clamp(1.05rem,2vw,1.5rem);line-height:1.04;overflow-wrap:anywhere}
.pedagogy-button span{margin-top:.35rem;color:var(--cream);font-size:.76rem;text-transform:uppercase;letter-spacing:.06em}
.pedagogy-button small{align-self:end;margin-top:1rem;color:#b7d0c8;font-size:.73rem;line-height:1.35}
.pedagogy-node:nth-child(even) .pedagogy-button{border-color:rgba(216,115,63,.45);background:linear-gradient(145deg,rgba(42,39,28,.88),rgba(3,17,16,.96))}
.how-it-travels{margin-bottom:7rem;padding:clamp(1.5rem,5vw,4rem);border-top:1px solid var(--ember);border-bottom:1px solid var(--line);background:rgba(4,27,25,.62)}.how-it-travels h2{max-width:14ch;margin:.4rem 0;font-size:clamp(2.1rem,5vw,4.8rem);line-height:.95}.how-it-travels>p:not(.signal-number){max-width:48rem;color:var(--readable-teal)}.how-it-travels ol{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;counter-reset:steps;list-style:none;padding:1px;background:var(--line)}.how-it-travels li{padding:1.2rem;color:var(--cream);background:var(--water-black)}.how-it-travels li::before{counter-increment:steps;content:"0" counter(steps);display:block;color:var(--ember-hot);font-size:.67rem;letter-spacing:.14em}.how-it-travels li span{color:var(--signal-teal);font-family:var(--display)}
.teaching-dialog{width:min(58rem,calc(100% - 1rem));max-height:calc(100dvh - 1rem);padding:0;border:0;border-radius:.2rem;background:transparent;box-shadow:0 2rem 8rem rgba(0,0,0,.82)}.teaching-dialog::backdrop{background:rgba(1,9,8,.9);backdrop-filter:blur(8px)}
.teaching-card{position:relative;overflow:auto;max-height:calc(100dvh - 1rem);padding:clamp(1rem,5vw,3.6rem);color:var(--paper-ink);background:linear-gradient(145deg,var(--paper-light),var(--paper));border:.35rem solid #0b302b;border-radius:.2rem}.teaching-card p,.teaching-card label,.teaching-card legend{color:var(--paper-ink)}
.dialog-close{position:sticky;top:0;z-index:2;display:flex;justify-content:flex-end}.dialog-close button{color:var(--paper-ink);background:var(--signal-teal);border-color:#173a34}
.teaching-glyph{float:right;width:clamp(8rem,24vw,13rem);height:clamp(8rem,24vw,13rem);object-fit:contain;margin:1rem 0 1.5rem 1.5rem;padding:1rem;background:#08221e;box-shadow:.7rem .7rem 0 var(--ember)}
.teaching-source{display:flex;gap:1rem;flex-wrap:wrap;align-items:center}.teaching-source p{margin:.8rem 0;color:#6a2a13!important;font-size:.67rem;font-weight:950;letter-spacing:.12em;text-transform:uppercase}
.teaching-card h2{max-width:14ch;margin:.3rem 0;font-size:clamp(2.2rem,7vw,4.5rem);line-height:.92;overflow-wrap:anywhere}.teaching-gloss{font-weight:900;font-size:1.1rem}.teaching-provocation{clear:both;margin:1.5rem 0;padding:1.1rem;border-top:2px solid #173a34;border-bottom:2px solid #173a34;font-family:var(--display);font-size:clamp(1.15rem,3vw,1.75rem);font-weight:850;line-height:1.2}.teaching-note{font-size:1.03rem}.model-example{margin:1.4rem 0;padding:1rem;border-left:.35rem solid #6a2a13;background:#fff1ca}.model-example strong{color:#6a2a13}.model-example p{margin:.35rem 0 0}.reflection-prompt{padding-left:1rem;border-left:.35rem solid #0b5b52;font-family:var(--display);font-size:1.15rem;font-weight:850}.permission-note{font-size:.87rem;font-weight:750}
.teaching-card fieldset{margin:1.5rem 0 1rem;padding:0;border:0}.stance-options{display:grid;grid-template-columns:repeat(3,1fr);gap:.55rem;margin-top:.6rem}.stance-choice{position:relative}.stance-choice input{position:absolute;opacity:0}.stance-choice label{height:100%;display:flex;align-items:center;justify-content:center;border:2px solid #463527;border-radius:.2rem;padding:.8rem;text-align:center;cursor:pointer}.stance-choice input:checked+label{color:#fff5d9;background:#102a20;border-color:#102a20;box-shadow:inset 0 0 0 .18rem var(--ember)}.stance-choice input:focus-visible+label{outline:.2rem solid #006f68;outline-offset:.15rem}
.form-help,.character-count{margin:.1rem 0;font-size:.8rem}.character-count{text-align:right}.form-error{min-height:1.5em;color:#781d10!important;font-weight:900}.primary-button{color:#081714;background:#68d3c5;border-color:#173a34}.secondary-button{color:#fff8df;background:#633018;border-color:#633018}.copy-fallback{margin-top:1.2rem;padding:1rem;border:2px solid #133c30;background:#fff1ca}.copy-fallback h3{margin-top:0}.copy-fallback textarea{font-family:var(--mono)}
.activity-footer{padding:2.5rem 1rem 4rem;border-top:1px solid var(--line);color:#8eaaa1;text-align:center;font-size:.72rem}

/* The unlinked instructor receiver keeps the same visual world without touching its tested machinery. */
.relay-shell{width:min(92rem,calc(100% - 2rem))}.relay-hero{min-height:56vh}.relay-hero h1{max-width:12ch}.field-notice{position:relative;z-index:1;max-width:58rem;display:flex;gap:.8rem;align-items:flex-start;margin-top:1.5rem;padding:1rem 1.2rem;border-left:.35rem solid var(--ember);background:#0b2925}.field-notice strong{color:var(--ember-hot);white-space:nowrap}.field-notice span{color:var(--cream)}
.relay-workbench{display:grid;grid-template-columns:1.12fr .9fr .9fr;gap:1rem}.control-panel{padding:1.2rem;border:1px solid var(--line);border-radius:.2rem;background:rgba(4,27,25,.88);box-shadow:.4rem .4rem 0 rgba(0,0,0,.4)}.control-panel h2{margin:.25rem 0 1rem;font-size:clamp(1.6rem,3vw,2.5rem);line-height:1}.control-panel label{display:block;margin:.8rem 0 .3rem}.control-panel label span{font-weight:500}.import-status,.session-status{min-height:2.8rem;padding:.7rem;border-left:.25rem solid var(--signal-teal);color:#dce9dc;background:#10271f}.relay-counts{display:grid;grid-template-columns:repeat(3,1fr);gap:.5rem}.relay-counts div{padding:.7rem;border:1px solid rgba(216,115,63,.38)}.relay-counts dt{font-size:.64rem;text-transform:uppercase;letter-spacing:.1em}.relay-counts dd{margin:0;color:var(--signal-teal);font-family:var(--display);font-size:2rem}.control-stack{display:grid;gap:.55rem}.file-button{display:block;text-align:center}.danger-zone{margin-top:1.2rem;padding:1rem;border:2px solid #b96354;background:#351813}.danger-zone strong{color:var(--danger)}.danger-zone p{font-size:.82rem}.danger-zone button{border-color:var(--danger);color:var(--danger);background:#1d0d0a}
.stray-station,.class-guide{margin-top:clamp(4rem,8vw,7rem)}.stray-list{display:grid;gap:.8rem}.stray-card{padding:1rem;border:2px dashed var(--ember);background:#201c14}.empty-state{padding:2rem;border:1px dashed rgba(244,232,197,.25);color:#b8c6ba;text-align:center}.guide-field{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;margin-bottom:6rem}.guide-section{min-height:13rem;padding:1.2rem;border:1px solid var(--line);background:linear-gradient(145deg,#0d332e,#061815)}.guide-section h3{margin:0;color:var(--signal-teal);font-size:1.35rem;overflow-wrap:anywhere}.guide-section .guide-gloss{margin:.25rem 0 1rem;color:#d6e0d3;font-size:.78rem;font-weight:750}.offering-list{display:grid;gap:.65rem;list-style:none;padding:0}.offering-card{position:relative;padding:.8rem .8rem .8rem 1.7rem;border-left:.2rem solid var(--ember);color:#f5ecd1;background:#0b2119}.offering-card::before{position:absolute;left:.6rem;content:"✦";color:var(--signal-teal)}.offering-actions{display:flex;gap:.4rem;flex-wrap:wrap;margin-top:.6rem}.offering-actions button{min-height:2rem;padding:.35rem .65rem;font-size:.68rem}.noscript-note{padding:1rem;color:var(--paper-ink);background:var(--paper)}

@media(max-width:980px){.relay-workbench{grid-template-columns:1fr 1fr}.session-panel{grid-column:1/-1}.pedagogy-field{grid-template-columns:repeat(2,1fr)}.pedagogy-node:nth-child(n){grid-column:auto}}
@media(max-width:760px){.recognition-scene{grid-template-columns:1fr;padding:1.2rem}.recognition-scene::after{display:none}.recognition-reveal,.privacy-signal{grid-column:auto}.hero-signal{display:none}}
@media(max-width:680px){.site-nav{position:static;display:block}.site-nav span{display:block;margin-top:.35rem}.activity-shell,.relay-shell{width:min(100% - 1rem,82rem)}.activity-hero,.relay-hero{min-height:68vh}.section-heading{grid-template-columns:1fr;gap:.7rem}.pedagogy-field{grid-template-columns:1fr;padding:1rem 0}.pedagogy-node:nth-child(n){grid-column:auto;min-height:12rem}.pedagogy-button{grid-template-columns:4.2rem 1fr}.pedagogy-button img{width:4rem;height:4rem}.how-it-travels ol,.relay-workbench,.guide-field{grid-template-columns:1fr}.session-panel{grid-column:auto}.field-notice{display:block}.field-notice strong{display:block;margin-bottom:.35rem;white-space:normal}.stance-options{grid-template-columns:1fr}.teaching-card{border-width:.22rem}.teaching-glyph{float:none;margin:1rem 0;width:7rem;height:7rem}.relay-counts{grid-template-columns:1fr 1fr 1fr}}
@media(max-width:320px){body{font-size:.96rem}.activity-shell,.relay-shell{width:calc(100% - .75rem)}.activity-hero{overflow:hidden}h1{font-size:2.55rem}.recognition-scene{padding:.8rem}.pedagogy-field{grid-template-columns:1fr;overflow:hidden}.pedagogy-button{grid-template-columns:3.5rem 1fr;padding:.7rem}.pedagogy-button img{width:3.3rem;height:3.3rem}.control-panel{padding:.75rem}.relay-counts{grid-template-columns:1fr}.teaching-card{padding:.8rem}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;scroll-behavior:auto!important;transition:none!important}}
@media print{body{color:#111;background:#fff}body::before,body::after,.site-nav,.relay-hero,.relay-workbench,.stray-station,.offering-actions{display:none!important}.relay-shell{width:100%}.class-guide{margin-top:0}.guide-field{display:block}.guide-section{break-inside:avoid;margin-bottom:1rem;color:#111;background:#fff;border:2px solid #222}.guide-section h3,.guide-section .guide-gloss,.offering-card{color:#111}.offering-card{background:#fff;border-left:3px solid #111}.activity-footer{color:#111;border-color:#111}}