/* Year 9 studio: built on the study kit (kit.css) so it reads as part of assembly.
   One pastel case tint per tool: mint (study sprint), sky (app builder), lavender (vision detective), blush (AI judgement). */
.skip{position:absolute;left:12px;top:-60px;z-index:20;background:var(--as-ink);color:#fff;border-radius:12px;padding:8px 14px;font-weight:600;text-decoration:none}
.skip:focus{top:12px}
.top{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;background:var(--as-card);border:1px solid var(--as-line);border-radius:22px;padding:12px 14px 12px 18px;box-shadow:var(--as-shadow)}
.top .as-lock{display:inline-flex;align-items:baseline;margin-right:auto;text-decoration:none;border-radius:12px}
.top .as-word{font-size:26px}
.top nav{display:flex;gap:4px;flex-wrap:wrap}
.top nav a{color:var(--as-ink);text-decoration:none;font:600 14px var(--as-font);padding:7px 12px;border-radius:999px}
.top nav a:hover{background:var(--as-mintsoft)}
.top nav a[aria-current="page"]{background:var(--as-mintsoft);box-shadow:inset 0 0 0 1.5px #BFE8D6}
h2{margin:0;font:600 clamp(24px,3vw,32px)/1.1 var(--as-display);color:var(--as-ink);letter-spacing:-.01em}
h3{margin:0;font:600 18px/1.2 var(--as-display);color:var(--as-ink)}
h4{margin:0;font:600 13px var(--as-font);letter-spacing:.06em;text-transform:uppercase;color:var(--as-muted)}
.y9-fine{margin:0;font-size:12.5px;color:var(--as-muted)}
.mint{--tint:#BFE8D6;--tsoft:#E5F5EE}.sky{--tint:#BFDDF5;--tsoft:#E6F1FB}.lavender{--tint:#D9CBF2;--tsoft:#EFE8FA}.blush{--tint:#F3B8C8;--tsoft:#FBE6EC}.peach{--tint:#F9D2B8;--tsoft:#FCEDE3}

/* hero, like the hub's */
.y9-hero{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:22px;align-items:center;background:var(--as-card);border:1px solid var(--as-line);border-radius:32px;padding:clamp(18px,3.4vw,40px);box-shadow:var(--as-shadow)}
.y9-hero h1{font-size:clamp(36px,5.6vw,64px);line-height:1;max-width:12ch;margin:8px 0 14px}
.y9-hero p{margin:0;max-width:54ch;font-size:16.5px;color:var(--as-text)}
.cta{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.btn.big{font-size:15px;padding:11px 20px}
.y9-note{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin-top:14px!important;font-size:13.5px!important;color:var(--as-muted)!important}
.y9-hero-art{display:grid;grid-template-columns:1fr 1fr;gap:16px;max-width:360px;justify-self:center;width:100%}
.y9-tile{aspect-ratio:1;border-radius:26px;background:var(--tint);display:grid;place-items:center;align-content:center;gap:6px;color:var(--as-ink);
 box-shadow:inset 0 0 0 2px rgba(255,255,255,.55),inset 0 -4px 0 rgba(34,42,85,.08),10px 12px 0 -4px rgba(27,36,82,.12)}
.y9-tile svg{width:46%;height:auto;color:var(--as-ink)}
.y9-tile b{font:600 14px var(--as-display)}

/* tool picker */
.y9-bench{background:var(--as-card)}
.y9-tools{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;padding:14px 14px 0}
.y9-tool{appearance:none;display:flex;align-items:center;gap:10px;text-align:left;border:1.5px solid var(--as-line);background:var(--as-card);border-radius:20px;padding:10px 12px;cursor:pointer;color:var(--as-ink);min-width:0;transition:background .2s ease,border-color .2s ease,transform .12s ease}
.y9-tool:hover{background:var(--tsoft);border-color:var(--tint)}
.y9-tool:active{transform:scale(.98)}
.y9-tool[aria-selected="true"]{background:var(--tsoft);border-color:var(--as-ink);box-shadow:inset 0 0 0 1px var(--as-ink)}
.y9-ic{flex:none;width:42px;height:42px;border-radius:14px;background:var(--tint);display:grid;place-items:center;box-shadow:inset 0 0 0 1.5px rgba(34,42,85,.14)}
.y9-ic svg{width:28px;height:28px;color:var(--as-ink)}
.y9-tt{display:grid;gap:1px;min-width:0}
.y9-tt b{font:600 15.5px/1.15 var(--as-display)}
.y9-tt small{font:500 12.5px/1.3 var(--as-font);color:var(--as-muted)}
.y9-panel{gap:16px}
.y9-panel .caption{min-height:0}
.y9-acts{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.y9-fb{margin:0;font:600 14px/1.45 var(--as-font);color:var(--as-ink);border-radius:14px}
.y9-fb:empty{display:none}
.y9-fb.good{background:var(--as-mintsoft);padding:10px 14px;color:var(--as-mintink)}
.y9-fb.try{background:#FFF3EE;padding:10px 14px;color:var(--as-warn)}
.y9-fb.hint{background:var(--as-sunsoft);padding:10px 14px}
.y9-input,.y9-brief input,.y9-brief select,.y9-explain textarea{font:500 15px var(--as-font);color:var(--as-ink);background:var(--as-card);border:1.5px solid var(--as-line2);border-radius:14px;padding:10px 12px;width:100%;min-width:0;resize:vertical}
.y9-input:focus-visible,.y9-explain textarea:focus-visible,.y9-brief input:focus-visible{outline:3px solid var(--as-focus);outline-offset:1px}
/* option pills (radio inputs styled like the kit's pick buttons) */
.y9-opts{display:flex;flex-wrap:wrap;gap:6px}
.y9-opts.y9-stack{display:grid}
.y9-opts label,.y9-choices label{position:relative;cursor:pointer;display:block}
.y9-opts input,.y9-choices input{position:absolute;opacity:0;width:1px;height:1px}
.y9-opts span,.y9-choices span{display:flex;align-items:center;gap:8px;border:1.5px solid var(--as-line);background:var(--as-card);border-radius:14px;padding:8px 12px;font:600 14px/1.3 var(--as-font);color:var(--as-ink)}
.y9-opts label:hover span,.y9-choices label:hover span{border-color:var(--as-line2);background:var(--as-soft)}
.y9-opts input:checked+span,.y9-choices input:checked+span{border-color:var(--as-ink);box-shadow:inset 0 0 0 1px var(--as-ink);background:var(--tsoft,var(--acc-soft))}
.y9-opts input:focus-visible+span,.y9-choices input:focus-visible+span{outline:3px solid var(--as-focus);outline-offset:2px}
.y9-choices{border:0;margin:0;padding:0;display:grid;gap:8px;min-width:0}
.y9-choices span{font-weight:500}
fieldset{border:0;margin:0;padding:0;min-width:0}

/* 1 · study sprint (mint) */
#panel-study{--tint:#BFE8D6;--tsoft:#E5F5EE}
.y9-subjects button[aria-pressed="true"]{background:var(--tint);border-color:var(--as-ink);color:var(--as-ink)}
.y9-progress{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px 18px}
.y9-progress li{display:flex;align-items:center;gap:8px;font:600 13px var(--as-font);color:var(--as-muted)}
.y9-progress span{width:24px;height:24px;border-radius:50%;display:grid;place-items:center;background:var(--as-soft);color:var(--as-ink);font:600 12px var(--as-display)}
.y9-progress li.done{color:var(--as-ink)}
.y9-progress li.done span{background:var(--tint);box-shadow:inset 0 0 0 1.5px var(--as-mint)}
.y9-sprint{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);gap:14px;align-items:start}
.y9-sprint .card{display:grid;gap:10px;padding:16px 18px;border-radius:24px}
.y9-sprint .card p{max-width:none}
.y9-worked{background:var(--tsoft);border-color:transparent}
.y9-model{background:var(--as-card);border-radius:16px;padding:12px 14px;color:var(--as-ink);font-size:14.5px;box-shadow:inset 3px 0 0 var(--as-mint)}
.y9-sprint .card h3,.y9-source h3,.y9-explainer h3{margin:0;font:600 18px/1.2 var(--as-display);letter-spacing:0;text-transform:none;color:var(--as-ink)}
.y9-explain{display:grid;gap:8px;border-top:1px dashed var(--as-line2);padding-top:12px;margin-top:2px}
.y9-explain label{display:flex;justify-content:space-between;gap:8px;font:600 14px var(--as-font);color:var(--as-ink)}
.y9-explain small{font-weight:500;color:var(--as-muted)}
.y9-machine{display:flex;flex-wrap:wrap;gap:12px 18px;align-items:center;justify-content:space-between;border-radius:22px;padding:14px 18px;background:var(--as-soft)}
.y9-machine h3{margin:2px 0}
.y9-machine p{margin:0;font-size:14px;max-width:64ch}

/* 2 · app builder (sky) */
#panel-code{--tint:#BFDDF5;--tsoft:#E6F1FB}
.y9-builder{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.9fr) minmax(0,1.1fr);gap:14px;align-items:start}
.y9-col{display:grid;gap:10px;min-width:0;align-content:start}
.y9-col>h3{display:flex;align-items:center;gap:8px}
.y9-n{width:26px;height:26px;border-radius:50%;display:grid;place-items:center;background:var(--tint);font:600 13px var(--as-display);color:var(--as-ink);flex:none}
.y9-brief{background:var(--as-soft);border-radius:22px;padding:14px}
.y9-brief>label,.y9-brief legend{font:600 12px var(--as-font);letter-spacing:.06em;text-transform:uppercase;color:var(--as-muted);padding:0;margin-bottom:6px}
.y9-brief fieldset{display:grid}
.y9-accents i{width:16px;height:16px;border-radius:50%;box-shadow:inset 0 0 0 1.5px rgba(34,42,85,.2);flex:none}
.y9-stage{justify-items:center;text-align:center}
.y9-stage>h3{justify-self:start}
.y9-phone{width:min(100%,280px);border-radius:36px;background:var(--as-ink);padding:10px;box-shadow:0 22px 40px -26px rgba(27,36,82,.7)}
.y9-screen{--app-accent:#BFE8D6;background:var(--app-accent);border-radius:28px;padding:14px;min-height:430px;text-align:left;display:grid;gap:8px;align-content:start;transition:background .25s ease}
.y9-screen>*{margin:0}
.y9-mini-head{display:flex;justify-content:space-between;align-items:center;font:600 13px var(--as-font);color:var(--as-ink)}
.y9-mini-head span{width:34px;height:6px;border-radius:6px;background:rgba(34,42,85,.25)}
.y9-screen h4{font:600 22px/1.1 var(--as-display);letter-spacing:0;text-transform:none;color:var(--as-ink)}
.y9-screen p{font-size:13px;color:var(--as-ink)}
.y9-mini-stat{background:#fff;border-radius:16px;padding:8px 12px;font:500 12.5px var(--as-font);color:var(--as-muted)}
.y9-mini-stat b{display:block;font:600 26px/1.1 var(--as-display);color:var(--as-ink)}
.y9-mini-list{display:grid;gap:6px}
.y9-mini-list label{display:flex;gap:10px;align-items:center;background:#fff;border-radius:14px;padding:9px 12px;font:600 14px var(--as-font);color:var(--as-ink);cursor:pointer;min-height:44px}
.y9-mini-list input{width:20px;height:20px;accent-color:var(--as-ink)}
.y9-mini-count{font:600 54px/1 var(--as-display);color:var(--as-ink);text-align:center;background:#fff;border-radius:18px;padding:12px}
.y9-mini-row{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.y9-mini-btn{appearance:none;border:0;border-radius:14px;background:var(--as-ink);color:#fff;font:600 14px var(--as-font);min-height:44px;padding:8px 10px;cursor:pointer}
.y9-mini-lab{font:600 13px var(--as-font);color:var(--as-ink)}
.y9-screen textarea{width:100%;border:0;border-radius:14px;padding:10px;font:500 14px var(--as-font);color:var(--as-ink);resize:vertical}
.y9-mini-status{font:500 12px var(--as-font)!important;color:var(--as-muted)!important}
.y9-notes .btn{justify-self:start}
.y9-briefcard{background:var(--as-sunsoft);border-radius:18px;padding:12px 14px}
.y9-briefcard p{margin:4px 0 0;color:var(--as-ink);font-size:14.5px}
.y9-plan{margin:0;padding-left:20px;display:grid;gap:3px;font-size:14px;color:var(--as-ink)}
.y9-arch{display:grid;justify-items:center;gap:2px;background:var(--tsoft);border-radius:18px;padding:10px}
.y9-arch span{background:#fff;border-radius:12px;padding:6px 12px;font:600 13px var(--as-font);color:var(--as-ink);width:100%;text-align:center}
.y9-arch i{font-style:normal;color:var(--as-muted);line-height:1}
.y9-code{margin:0;max-height:300px;overflow:auto;background:var(--as-ink);color:#E9ECF8;border-radius:16px;padding:12px 14px;font:12px/1.5 var(--as-mono);white-space:pre-wrap;word-break:break-word}
.y9-tests{display:grid;gap:6px;background:var(--as-soft);border-radius:18px;padding:12px 14px}
.y9-tests label{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--as-ink);cursor:pointer}
.y9-tests input{width:18px;height:18px;margin:2px 0 0;accent-color:var(--as-ink);flex:none}
.y9-tests p{margin:0;font:600 13px var(--as-font);color:var(--as-muted)}

/* 3 · vision detective (lavender) */
#panel-vision{--tint:#D9CBF2;--tsoft:#EFE8FA;--case:#D9CBF2}
.y9-vision{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:16px;align-items:start}
.y9-samples button[aria-pressed="true"]{background:var(--tint);border-color:var(--as-ink);color:var(--as-ink)}
.y9-canvas{--case-soft:#EFE8FA;--case-line:#C9B8EC;padding:14px;border-radius:24px}
.y9-canvas canvas{display:block;width:100%;height:auto;border-radius:12px;background:#fff}
#scanLine{position:absolute;left:14px;right:14px;top:14px;height:3px;border-radius:3px;background:#D6466A;opacity:0;pointer-events:none}
.y9-canvas.scanning #scanLine{animation:y9-scan .9s ease-out}
@keyframes y9-scan{0%{opacity:.9;transform:translateY(0)}100%{opacity:0;transform:translateY(calc(var(--h,300px)))}}
.y9-upload{position:relative;justify-self:start;cursor:pointer}
.y9-upload input{position:absolute;inset:0;opacity:0;cursor:pointer;width:100%}
.y9-upload:focus-within{outline:3px solid var(--as-focus);outline-offset:2px}
.y9-range{display:grid;gap:6px;background:var(--as-soft);border-radius:18px;padding:10px 14px}
.y9-range label{display:flex;justify-content:space-between;align-items:baseline;font:600 12px var(--as-font);letter-spacing:.06em;text-transform:uppercase;color:var(--as-muted)}
.y9-range output{font:600 16px var(--as-display);color:var(--as-ink);letter-spacing:0}
.y9-range input{width:100%;accent-color:var(--as-ink)}
.y9-range small{font-size:12px;color:var(--as-muted)}
.y9-toggle{display:inline-flex;gap:8px;align-items:center;font:600 14px var(--as-font);color:var(--as-ink);cursor:pointer}
.y9-toggle input{width:18px;height:18px;accent-color:var(--as-ink)}
.y9-metrics{grid-template-columns:1fr 1fr}
.y9-explainer{background:var(--tsoft);border-color:transparent;display:grid;gap:4px}
.y9-explainer p,.y9-try ol,details p{margin:0;font-size:14px;color:var(--as-ink)}
.y9-try{display:grid;gap:6px}
.y9-try ol{padding-left:20px;display:grid;gap:4px}
details.card{padding:0}
details.card summary{cursor:pointer;padding:12px 16px;font:600 14px var(--as-font);color:var(--as-ink);border-radius:20px}
details.card summary:hover{background:var(--as-soft)}
details.card p{padding:0 16px 14px}

/* 4 · AI judgement (blush) */
#panel-ai{--tint:#F3B8C8;--tsoft:#FBE6EC}
.y9-source{background:var(--as-sunsoft);border-color:transparent;display:grid;gap:6px;max-width:820px}
.y9-source .truth{justify-self:start}
.y9-source p{color:var(--as-ink);font-size:15px}
.y9-source small{color:var(--as-muted);font-size:12.5px}
.y9-answers{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.y9-answer{display:grid;gap:10px;align-content:start;border-radius:22px}
.y9-answer legend{float:left;width:100%;font:600 16px var(--as-display);color:var(--as-ink);padding:0}
.y9-answer p{margin:0;color:var(--as-ink);font-size:14.5px}
.y9-answer .y9-opts span{font-size:13.5px}
.y9-answer.right{background:var(--as-mintsoft);border-color:#BFE8D6}
.y9-answer.wrong{background:#FFF3EE;border-color:#F3B2A2}
.y9-why{font:600 13px var(--as-font)!important;color:var(--as-ink)}
.y9-habit{display:grid;gap:8px}
.y9-habit ol{margin:0;padding-left:20px;display:grid;gap:4px;color:var(--as-ink);font-size:14px}
.y9-warn{font-size:13.5px!important}
.y9-habit a,.y9-guide a,footer a{color:var(--as-ink);text-decoration-color:var(--as-mint);text-decoration-thickness:2px;text-underline-offset:3px}

/* print lab callout (peach, the bike's case tint) and guidance */
.y9-print{display:grid;grid-template-columns:minmax(0,.7fr) minmax(0,1.3fr);gap:18px;align-items:center;background:#FCEDE3;border-radius:32px;padding:clamp(16px,3vw,30px);box-shadow:inset 0 0 0 2px #F9D2B8}
.y9-print .y9-bike{width:100%;max-width:320px;justify-self:center}
.y9-print p{margin:6px 0 14px;max-width:56ch;color:var(--as-ink)}
.y9-print h2{margin-top:4px}
.y9-guide{display:grid;gap:12px}
.y9-guide-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.y9-guide .card{display:grid;gap:6px}
.y9-guide .card h3{font:600 16px var(--as-display);text-transform:none;letter-spacing:0;color:var(--as-ink)}
.y9-guide .card p{font-size:14px}

@media (max-width:1000px){
 .y9-tools{grid-template-columns:1fr 1fr}
 .y9-builder{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
 .y9-notes{grid-column:1/-1}
 .y9-answers{grid-template-columns:1fr}
}
@media (max-width:820px){
 .y9-hero{grid-template-columns:1fr}
 .y9-hero h1{max-width:none}
 .y9-hero-art{grid-template-columns:repeat(4,1fr);max-width:none;gap:8px}
 .y9-tile{border-radius:18px;box-shadow:inset 0 0 0 2px rgba(255,255,255,.55),6px 7px 0 -3px rgba(27,36,82,.12)}
 .y9-tile b{display:none}
 .y9-sprint,.y9-vision,.y9-print{grid-template-columns:1fr}
 .y9-guide-grid{grid-template-columns:1fr}
 .y9-print .y9-bike{max-width:220px}
}
@media (max-width:620px){
 .top nav{width:100%}.top nav a{padding:6px 10px}
 .y9-tools{padding:10px 10px 0;gap:6px}
 .y9-tool{flex-direction:column;align-items:flex-start;gap:6px;padding:10px;border-radius:18px}
 .y9-ic{width:36px;height:36px;border-radius:12px}.y9-ic svg{width:24px;height:24px}
 .y9-tt b{font-size:14.5px}.y9-tt small{font-size:11.5px}
 .y9-builder{grid-template-columns:1fr}
 .y9-screen{min-height:0}
 .y9-canvas{padding:8px}
 #scanLine{left:8px;right:8px;top:8px}
}
@media (prefers-reduced-motion:reduce){.y9-tool,.y9-screen{transition:none}.y9-canvas.scanning #scanLine{animation:none}}

/* mint swash here, matching Next Lab (keeps big yellow off the page) */
.swash{background:linear-gradient(transparent 62%,#BFE8D6 62%,#BFE8D6 88%,transparent 88%)}