:root{--ink:#17344b;--paper:#fff;--sky:#eaf4fb;--accent:#075f80;--leaf:#176746;--signal:#f9cf55;--line:#bbcbd6;--soft:#f4f8fa;font-family:'Atkinson Hyperlegible',system-ui,sans-serif;color:var(--ink);background:#f4f8fa;font-size:18px;line-height:1.55;color-scheme:light}
*{box-sizing:border-box}body{margin:0}h1,h2,h3,h4,button{font-family:Nunito,'Atkinson Hyperlegible',sans-serif}h1{font-size:clamp(2rem,4.5vw,3.5rem);line-height:1.1;letter-spacing:-.03em;margin:.25em 0}h2{font-size:1.8rem;line-height:1.2;margin:0 0 .6em}h3{font-size:1.2rem;line-height:1.3}p{max-width:75ch}a{color:var(--accent);text-underline-offset:3px}a:hover{text-decoration-thickness:3px}button,input,textarea,select{font:inherit}button{cursor:pointer;border:2px solid var(--accent);border-radius:9px;background:var(--accent);color:white;min-height:46px;padding:9px 17px;font-weight:800;line-height:1.3}button:hover{filter:brightness(.92)}button:disabled{opacity:.6;cursor:default}button.quiet{color:var(--accent);background:white}button[aria-pressed=true]{outline:3px solid var(--signal);outline-offset:1px}:focus-visible{outline:3px solid #ad4c00;outline-offset:4px}input,textarea,select{border:2px solid #788d9e;border-radius:6px;background:#fff;color:var(--ink);padding:9px;max-width:100%;min-height:46px}input[type=checkbox],input[type=radio]{min-height:22px;width:22px;height:22px;accent-color:var(--accent);flex:0 0 auto}input[readonly]{background:#edf1f4;border-color:#bcc8d0}textarea{width:100%;resize:vertical;line-height:1.5}label{font-weight:700}fieldset{border:0;padding:0;margin:20px 0}legend{font-weight:700;margin-bottom:10px}[hidden]{display:none!important}.skip-link{position:absolute;left:15px;top:-100px;padding:12px;background:white;z-index:50}.skip-link:focus{top:10px}.page-shell, .catalog-header, #catalog{max-width:1160px;margin:auto;padding:22px 28px}.crumbs{display:flex;gap:20px;flex-wrap:wrap;padding:4px 0 22px;font-size:.95rem}.lab-header{display:grid;grid-template-columns:110px 1fr;gap:25px;padding:20px 0 28px;border-bottom:4px solid var(--accent)}.lab-emblem{font-size:65px;display:grid;place-items:center;background:var(--sky);border-radius:24px 8px 24px 8px;width:110px;height:110px}.lesson-label{font-size:.95rem;font-weight:700;margin:0;color:#405d70}.mission-lead{font-size:1.1rem;margin-bottom:0}.toolbar{display:flex;gap:20px;align-items:center;padding:24px 0}.toolbar>label{display:grid;gap:5px;min-width:160px}.toolbar>p{font-size:.95rem;flex:1}.save-tools{font-size:.82rem;max-width:300px;display:grid;gap:6px;justify-items:end;text-align:right}.save-tools>div{display:flex;gap:8px;margin-top:2px}.save-tools button{font-size:.8rem;padding:8px 10px}.tabs{display:grid;grid-template-columns:repeat(6,1fr);gap:4px;background:#d6e2eb;padding:6px;border-radius:12px 12px 0 0}.tabs button{border:0;border-radius:7px;min-height:58px;background:transparent;color:var(--ink);padding:6px 8px;font-size:.95rem;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:8px;text-align:left}.tabs button[aria-selected=true]{background:white;box-shadow:0 2px 0 var(--accent);color:var(--accent)}#workspace{background:white;border:1px solid var(--line);border-top:0;border-radius:0 0 14px 14px;scroll-margin-top:12px}[role=tabpanel]{padding:32px;min-height:500px}.brief-layout{display:grid;grid-template-columns:1.6fr 1fr;gap:35px}.large-copy{font-size:1.15rem}.objectives{padding-left:23px}.objectives li{margin:12px 0}.route-card,.review-card{background:var(--sky);border-top:5px solid var(--accent);padding:22px;border-radius:4px 4px 16px 16px}.route-card li{padding:6px 0}.ready-note{padding:2px 20px;border-left:5px solid var(--signal);margin:25px 0}.writing{display:block;margin:24px 0}.writing textarea{display:block;margin-top:9px;font-weight:400}.field-hint{display:block;font-size:.93rem;font-weight:400;margin:6px 0 10px;color:#425e70}.bottom-nav{display:flex;justify-content:space-between;align-items:center;gap:12px;margin:22px 0}.bottom-nav p{font-size:.85rem}.lesson-switch,.game-menu{display:flex;gap:12px;flex-wrap:wrap;margin:22px 0}.lesson-switch button{flex:1;min-width:180px;font-size:.95rem}.worked-example{background:#f3f7fb;border-left:6px solid var(--accent);padding:18px 24px;margin:24px 0}.worked-example li{padding:8px 0 8px 8px}.worked-example li::marker{font-weight:800;color:var(--accent)}.worked-example button{margin-right:12px}details{margin:20px 0}summary{cursor:pointer;min-height:46px;font-weight:700;display:list-item;padding:8px 0}.vocab{border-top:1px solid var(--line);padding-top:10px}.vocab dl{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.vocab dl>div{border-bottom:1px solid var(--line);padding:0 0 15px}.vocab dt{font-weight:800}.vocab dd{margin:6px 0}.vocab-example{display:block;font-style:italic;margin-top:8px}.model-workspace{display:grid;grid-template-columns:minmax(0,1fr) 230px;border:2px solid var(--line);border-radius:14px;overflow:hidden;margin-top:20px}.model-picture{display:grid;place-items:center;min-height:340px;background:#f6fbfd;padding:10px}.model-picture svg{width:100%;height:auto;overflow:visible;font-size:16px;font-family:'Atkinson Hyperlegible',sans-serif}.model-picture text{fill:var(--ink);font-weight:700}.model-picture line{stroke:#6d8799;stroke-width:2}.model-picture .gridline{stroke:#cedce5;stroke-width:1}.model-picture .heavy{stroke:var(--ink);stroke-width:4}.model-picture .dashed{stroke:var(--ink);stroke-dasharray:5 4}.model-picture .shape{fill:#f9cf55;stroke:#84640c;stroke-width:1.5}.model-picture .shape-alt{fill:#82c7df;stroke:#266580;stroke-width:1.5}.model-picture .shape-light{fill:#d6e9f2;stroke:#47728c;stroke-width:2}.model-picture .point{fill:var(--accent);stroke:white;stroke-width:2}.model-picture .point-alt{fill:#a84820;stroke:white;stroke-width:2}.model-picture .open-point{fill:white;stroke:var(--accent);stroke-width:3}.model-picture .plot{stroke:var(--accent);stroke-width:2}.model-picture .solution{stroke:var(--accent);stroke-width:6}.model-controls{padding:18px;background:#edf4f8;display:flex;flex-direction:column;gap:14px;justify-content:center}.model-controls label{font-size:.88rem;display:grid;gap:5px}.model-controls input{width:100%;font-size:1.05rem}.model-readout{background:#edf6ef;padding:16px 20px;border-left:5px solid var(--leaf);font-size:1rem}.model-readout strong{font-size:1.1rem}.model-readout p{margin:8px 0 0}.model-error{color:#8a2616;min-height:0}.model-error:empty{display:none}.investigation-prompts article{border-top:2px solid var(--line);margin-top:28px;padding-top:12px}.stretch-task{padding:18px;background:#fff6d7;border-left:5px solid #996d09}.question-nav{display:flex;flex-wrap:wrap;gap:9px;margin:24px 0}.question-nav button{background:white;color:var(--accent);min-width:46px;padding:8px}.question-nav button[aria-pressed=true]{background:var(--accent);color:white}.question{max-width:820px;margin:0}.question-prompt{font-size:1.12rem}.choice{display:flex;align-items:flex-start;gap:14px;background:#f3f7fa;border:2px solid #d6e1e9;border-radius:8px;padding:14px;margin:10px 0;font-weight:400}.choice:has(input:checked){border-color:var(--accent);background:#e4f1f8}.choice input{margin-top:3px}.actions{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0 14px}.practice-feedback{padding:0;min-height:30px}.practice-feedback.correct{color:#145133;border-left:5px solid #176746;padding:15px;background:#edf6ef}.practice-feedback.retry{color:#6e4209;border-left:5px solid #a8660a;padding:15px;background:#fff4df}.hint-area p{padding:12px 18px;background:#fff8df;border-left:4px solid #c49514}.explanation{padding:18px 22px;background:#edf5fa;border-left:5px solid var(--accent)}.explanation h4{margin-top:0}.practice-pagination{display:flex;justify-content:space-between;margin-top:28px;gap:14px}.number-answer{display:grid;gap:9px;max-width:450px}.parameter-list{background:var(--soft);padding:15px 35px}.create-layout{display:grid;grid-template-columns:1.5fr 1fr;gap:25px}.check-item{display:flex;gap:12px;font-weight:400;margin:15px 0}.round-heading{display:flex;align-items:baseline;justify-content:space-between;gap:15px}.mission-track{display:flex;gap:15px;margin:12px 0 22px}.mission-track span{display:grid;place-items:center;border:2px solid var(--accent);color:var(--accent);width:50px;height:50px;border-radius:50%;font-weight:800}.mission-track .earned{background:var(--leaf);border-color:var(--leaf);color:white}.target{background:#fff4ce;border-left:5px solid #9a7210;padding:18px;font-size:1.18rem;font-weight:700}.game-feedback{font-weight:700;min-height:30px}.match-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.match-card{min-height:155px;padding:15px;background:#e7f2f8;color:var(--ink);border-color:#7198af;font-weight:600;font-size:.98rem;display:flex;flex-direction:column;gap:14px;justify-content:center}.match-card .card-kind{font-size:.85rem;font-weight:800;color:#335a70}.match-card.selected{background:#fff2c6;border-color:#977008}.match-card.matched{opacity:1;background:#e1f2e8;border-color:var(--leaf)}.game-win{padding:35px;background:#edf6ef;text-align:center}.game-win p{margin:15px auto}.win-icon{font-size:65px}.game-win button{margin:10px}footer{font-size:.88rem;margin:30px auto;max-width:1100px;padding:12px 0}footer p{color:#425e70}.lesson-links{display:flex;gap:14px;flex-wrap:wrap}.print-only{display:none}.load-error{max-width:700px;margin:60px auto;padding:25px}.section-intro{max-width:820px}
@media(max-width:900px){.model-workspace{grid-template-columns:1fr}.model-controls{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.model-picture{min-height:280px}.toolbar{flex-wrap:wrap}.save-tools{max-width:none;width:100%;display:flex;gap:20px;align-items:center}.brief-layout,.create-layout{grid-template-columns:1fr}.match-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.lab-header{grid-template-columns:80px 1fr;gap:18px}.lab-emblem{width:80px;height:80px;font-size:48px}}
@media(max-width:600px){:root{font-size:17px}.page-shell,.catalog-header,#catalog{padding:15px}.lab-header{grid-template-columns:1fr;padding-top:10px}.lab-emblem{width:65px;height:65px;font-size:40px}.tabs{grid-template-columns:repeat(3,1fr);gap:5px}.tabs button{min-height:48px}.toolbar>p{min-width:150px}.save-tools{flex-wrap:wrap;gap:5px}.save-tools>div{width:100%}[role=tabpanel]{padding:22px 16px}.model-picture{padding:5px;min-height:200px}.model-picture svg{font-size:18px}.model-controls{padding:12px;gap:12px}.model-readout{padding:14px}.vocab dl{grid-template-columns:1fr}.match-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.match-card{min-height:180px}.bottom-nav{flex-wrap:wrap}.bottom-nav p{order:3;width:100%;text-align:center;margin:0}.bottom-nav button{font-size:.9rem;flex:1}.practice-pagination button{font-size:.9rem}.worked-example{padding:14px}.worked-example ol{padding-left:24px}.worked-example button{margin-top:8px}.actions button{flex:1 1 150px}.round-heading{display:block}.round-heading p{margin:0}.lesson-switch button{font-size:.9rem}footer{padding:12px 15px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
@media print{body{background:white;color:black}.page-shell{max-width:none;padding:0}.page-shell>*{display:none!important}.page-shell>#print-report{display:block!important}#print-report pre{white-space:pre-wrap;font-family:inherit;font-size:12pt;line-height:1.45}#print-report h1{font-size:22pt}a{color:black}.print-only{display:block}@page{margin:18mm}}
.model-workspace[data-kind="data"]{grid-template-columns:1fr}
.model-workspace[data-kind="data"] .model-picture svg{max-width:720px}
.model-workspace[data-kind="data"] .model-controls{display:grid;grid-template-columns:repeat(4,minmax(0,1fr))}
.model-workspace[data-kind="coordinates"] .model-picture svg{max-width:440px}
@media(max-width:600px){.model-workspace[data-kind="data"] .model-controls{grid-template-columns:repeat(2,minmax(0,1fr))}}

/* Upgrade layer: course navigation, progress, learn, investigate, practice, create, catalog. */
.ewl-course-nav{position:relative;z-index:30;background:#fff;border-bottom:1px solid #d2dcd7;font-size:16px;line-height:1.35}
.ewl-course-nav__inner{max-width:1180px;margin:0 auto;padding:10px 32px;display:flex;gap:24px;align-items:center;justify-content:space-between}
.ewl-course-brand{display:grid;grid-template-columns:28px auto;column-gap:10px;align-items:center;flex-shrink:0;min-height:48px;font-size:18px;font-weight:700;color:var(--ink);text-decoration:none}
.ewl-course-brand img{grid-row:span 2}.ewl-course-brand span{font-size:14px;color:#506662;font-weight:400}
.ewl-course-nav ul{display:flex;flex-wrap:wrap;gap:4px;margin:0;padding:0;list-style:none}.ewl-course-nav li{padding:0;margin:0}
.ewl-course-nav li a{display:flex;align-items:center;justify-content:center;min-height:44px;padding:10px 12px;border-radius:6px;color:#506662;font-size:16px;font-weight:700;text-decoration:none}
.ewl-course-nav li a:hover{background:#edf3f9;color:var(--accent)}
.ewl-course-nav li a[aria-current=page]{color:var(--accent);background:#eaf2fa;text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:6px}
.ewl-skip{position:absolute;top:-100px;left:16px;z-index:60;padding:12px 16px;background:#fff;color:var(--accent)}.ewl-skip:focus{top:8px}
.lesson-chips{list-style:none;display:flex;flex-wrap:wrap;gap:8px;padding:0;margin:14px 0 0}
.lesson-chip{display:inline-flex;align-items:center;min-height:36px;padding:4px 12px;border-radius:999px;background:var(--sky);color:var(--accent);font-weight:700;font-size:.9rem;text-decoration:none;border:1px solid #c9dbe6}
a.lesson-chip:hover{background:#d9ebf6}.quiet-chip{background:#f1f4f6;color:#405d70;border-color:#d7e0e6}
.lesson-meta,.question-meta{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 12px}
.progress-pill{display:inline-block;padding:4px 12px;border-radius:999px;background:var(--sky);color:var(--accent);font-weight:800;font-size:.85rem}
.tab-step{display:grid;place-items:center;width:26px;height:26px;border-radius:50%;background:#fff;color:var(--accent);font-size:.8rem;font-weight:800;border:2px solid #b8cad7}
.tabs button[aria-selected=true] .tab-step{background:var(--accent);color:#fff;border-color:var(--accent)}
.tab-mark{min-width:18px;font-weight:800;color:var(--leaf);font-size:1rem;text-align:right}
.tabs button[data-status=done] .tab-step{background:var(--leaf);border-color:var(--leaf);color:#fff}
.tabs button[data-status=started] .tab-mark{color:#9a7210}
.route-list{list-style:none;padding:0;margin:0 0 18px;counter-reset:route}
.route-list li{counter-increment:route;display:grid;grid-template-columns:30px 1fr;gap:4px 10px;padding:9px 0;border-bottom:1px solid #cfdfe9}
.route-list li::before{content:counter(route);grid-row:span 2;display:grid;place-items:center;width:28px;height:28px;border-radius:50%;border:2px solid var(--accent);color:var(--accent);font-weight:800;font-size:.85rem;background:#fff}
.route-list li[data-status=done]::before{content:"✓";background:var(--leaf);border-color:var(--leaf);color:#fff}
.route-list li[data-status=started]::before{background:#fff2c6;border-color:#9a7210;color:#6e4209}
.route-title{font-weight:800;display:flex;justify-content:space-between;gap:10px}.route-time{font-weight:400;font-size:.85rem;color:#405d70}
.route-status{font-size:.9rem;color:#405d70}
.objectives li strong{color:var(--accent)}
.learn-toolbar{display:flex;flex-wrap:wrap;gap:14px;align-items:flex-start;justify-content:space-between;margin:20px 0}
.learn-toolbar .lesson-switch{margin:0;flex:1 1 420px}.lesson-switch button{display:grid;gap:2px;text-align:left;padding:10px 16px}
.switch-number{font-size:.8rem;opacity:.85;font-weight:700}.switch-title{font-size:.95rem}
.lang-switch{display:flex;gap:6px;background:#eef3f7;padding:4px;border-radius:10px;flex:0 0 auto}
.lang-switch button{min-height:42px;border:0;font-size:.9rem}.lang-switch button[aria-pressed=true]{background:var(--accent);color:#fff;outline:0}
.key-idea{background:#fff8e1;border:1px solid #e9d48a;border-left:6px solid #c49514;padding:16px 22px;margin:22px 0;border-radius:4px 10px 10px 4px}
.key-idea h4{margin:0 0 8px}.key-idea ol{margin:0;padding-left:22px}.key-idea li{margin:6px 0}
.worked-example.together{background:#eef7f1;border-left-color:var(--leaf)}
.worked-example ol{margin:0;padding-left:28px}.worked-example li.just-revealed{background:#fff;border-radius:6px}
.step-row{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:14px}.step-count{margin:0;flex:1 1 160px;font-weight:700;color:#405d70}
.objective-box{border:1px dashed #9db3c2;padding:12px 18px;border-radius:8px;margin:22px 0}.objective-box h4{margin:0 0 6px}.objective-box p{margin:0}
.method-strip{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;list-style:none;padding:0;margin:18px 0;counter-reset:method}
.method-strip li{counter-increment:method;background:var(--sky);border-radius:10px;padding:12px 14px 12px 50px;position:relative;font-size:.95rem}
.method-strip li::before{content:counter(method);position:absolute;left:12px;top:12px;width:28px;height:28px;border-radius:50%;background:var(--accent);color:#fff;display:grid;place-items:center;font-weight:800;font-size:.85rem}
.watch-card{background:#fff;border:1px solid var(--line);border-left:6px solid var(--accent);padding:4px 20px;border-radius:4px 10px 10px 4px}
.watch-card p{margin:12px 0}
.investigation-head{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px}.investigation-head h3{margin:0}
.done-check{margin:0;font-size:.95rem}.investigation-prompts article.is-done{border-top-color:var(--leaf)}
.investigation-prompts article.is-done h3::after{content:" ✓";color:var(--leaf)}
button.small{min-height:40px;padding:6px 12px;font-size:.88rem}
.practice-progress{margin:18px 0 6px}.progress-bar{height:12px;background:#e1e9ef;border-radius:999px;overflow:hidden;border:1px solid #c5d3dc}
.progress-bar span{display:block;height:100%;background:var(--leaf);transition:width 180ms}.progress-text{margin:8px 0 0;font-size:.95rem;color:#405d70;font-weight:700}
.practice-complete{background:#edf6ef;border-left:5px solid var(--leaf);padding:14px 18px;margin:14px 0}
.question-nav button.is-done{background:#e1f2e8;border-color:var(--leaf);color:#145133}.question-nav button.is-tried{border-style:dashed}
.question-nav button[aria-pressed=true]{background:var(--accent);color:#fff;border-color:var(--accent)}
.practice-feedback.saved{color:#1f4b63;border-left:5px solid var(--accent);padding:15px;background:#edf5fa}
.practice-feedback.correct::before{content:"✓ ";font-weight:800}.practice-feedback.retry::before{content:"↻ ";font-weight:800}
.starter-row{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:14px 0 0;font-size:.95rem}.starter-row span{font-weight:700}
.share-status{font-weight:700;color:#405d70;padding:10px 12px;background:#fff;border-radius:8px}.share-status.is-ready{color:#145133;background:#e1f2e8}
.how-to-play{background:var(--soft);padding:0 18px;border-radius:10px}.how-to-play ol{margin:0 0 14px;padding-left:22px}.how-to-play li{margin:6px 0}
.goal-gap{font-weight:700;color:#405d70;margin:-6px 0 14px}
@media(max-width:900px){.method-strip{grid-template-columns:1fr}.ewl-course-nav__inner{flex-direction:column;align-items:flex-start;gap:8px;padding:10px 16px}.tabs button{grid-template-columns:auto 1fr;gap:6px}.tab-mark{display:none}.save-tools{justify-items:start;text-align:left}}
@media(max-width:600px){.tabs{grid-template-columns:repeat(3,1fr)}.tabs button{grid-template-columns:1fr;text-align:center;justify-items:center;gap:2px;padding:6px 4px}.tab-step{width:22px;height:22px;font-size:.72rem}.tab-title{font-size:.82rem}.learn-toolbar .lesson-switch{flex-basis:100%}.lang-switch{width:100%}.lang-switch button{flex:1}.route-list li{grid-template-columns:26px 1fr}.lesson-chips{gap:6px}.lesson-chip{font-size:.82rem}}
@media print{.ewl-course-nav{display:none}}
/* Finale expeditions: art and controls share one play surface. */
.lab-expedition { overflow: hidden; border: 1px solid #365364; border-radius: 22px; background: #122b3b; color: #f3f7f5; box-shadow: 0 16px 40px #12334320; }
.lab-expedition-banner { padding: 24px 28px 12px; }
.lab-expedition .lab-expedition-banner h3 { color: #fff; font-size: clamp(1.4rem,3vw,2rem); line-height: 1.2; margin: 8px 0 12px; }
.lab-expedition .lab-expedition-banner p { color: #d7e6e5; max-width: 65ch; }
.lab-expedition-kicker { font-size: .85rem; text-transform: uppercase; letter-spacing: .1em; font-weight: 800; color: #c6edbc !important; }
.lab-expedition-world { aspect-ratio: 720/270; overflow: hidden; background: #192c42; }
.lab-expedition-world svg { display: block; width: 100%; height: 100%; object-fit: cover; }
.lab-expedition-deck { background: #f4f4ec; color: #173745; padding: 24px; }
.lab-expedition-deck h3 { color: #173745; }
.lab-expedition-status { font-weight: 700; }
.lab-expedition-sites { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 12px; margin: 18px 0; }
.lab-expedition-sites button { display: grid; gap: 8px; padding: 20px 14px; min-height: 132px; text-align: left; border: 2px solid #bdcbbd; border-radius: 12px; background: #fff; color: #173745; box-shadow: 0 4px 0 #c9d2c5; }
.lab-expedition-sites button:not(:disabled):hover { border-color: #39715c; transform: translateY(-2px); }
.lab-expedition-sites button:disabled { opacity: 1; color: #23573d; background: #e3f0da; border-color: #96bba0; }
.lab-expedition-sites span { font-size: .75rem; font-weight: 800; letter-spacing: .08em; }
.lab-expedition-sites strong { font-size: 1.12rem; line-height: 1.25; }
.lab-expedition-sites small { font-size: .9rem; line-height: 1.4; }
.lab-expedition button:focus-visible { outline: 3px solid #d3751d; outline-offset: 4px; }
.lab-expedition details { border-top: 1px solid #c6d0c4; padding-top: 16px; margin-top: 18px; }
.lab-expedition .game-feedback:not(:empty) { padding: 16px; background: #deebd7; border-radius: 10px; border-left: 4px solid #42734f; }
.lab-site-lit { animation: lab-restored 550ms ease-out; transform-box: fill-box; transform-origin: center; }
@keyframes lab-restored { from { opacity: .6; } to { opacity: 1; } }
@media (max-width: 600px) { .lab-expedition-banner,.lab-expedition-deck { padding: 18px; } .lab-expedition-sites { grid-template-columns: 1fr; } .lab-expedition-sites button { min-height: 100px; } .lab-expedition-world { aspect-ratio: 720/320; } }
@media (prefers-reduced-motion: reduce) { .lab-site-lit { animation: none; } .lab-expedition-sites button:not(:disabled):hover { transform: none; } }

/* Catalog (/curriculum/learning-labs/): student-facing finder, progress, and unit folding. */
.visually-hidden{position:absolute!important;width:1px;height:1px;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.catalog-header{padding-top:28px;padding-bottom:12px}
.labs-kicker{margin:0;font-size:.9rem;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:#11675d}
.catalog-header h1{margin:.1em 0 .25em}
.labs-lead{font-size:1.25rem;line-height:1.45;max-width:60ch;margin:0 0 10px}
.catalog-meta{font-size:.95rem;color:#506662;margin:0 0 22px}
.labs-spotlight{margin:0 0 26px;padding:20px 22px;background:#fff8e1;border:1px solid #f0d98a;border-radius:14px}
.labs-spotlight>h2{font-size:1.35rem;margin:0 0 12px}
.spotlight-groups{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px}
.spotlight-group h3{font-size:1rem;margin:0 0 8px;color:#6e4209}
.spotlight-list{display:grid;gap:10px}
.spotlight-card{display:flex;gap:14px;align-items:center;padding:12px 16px;background:#fff;border:1px solid #e3d6a8;border-left:6px solid var(--accent);border-radius:10px;color:var(--ink);text-decoration:none;min-height:64px}
.spotlight-card:hover{background:#fffdf5;border-color:var(--accent)}
.spotlight-icon{font-size:1.9rem;line-height:1}
.spotlight-text{display:grid;gap:1px}.spotlight-text strong{font-size:1.08rem;color:var(--accent)}
.spotlight-lessons,.spotlight-status{font-size:.88rem;color:#506662}
.lab-steps{margin:0 0 24px}
.lab-steps>h2{font-size:1.2rem;margin:0 0 10px}
.lab-steps ol{list-style:none;counter-reset:step;display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:10px;padding:0;margin:0}
.lab-steps li{counter-increment:step;display:grid;gap:2px;align-content:start;padding:12px 14px;background:#fff;border:1px solid #d2dcd7;border-radius:10px;font-size:.88rem;color:#506662}
.lab-steps li strong{font-size:1rem;color:var(--ink)}
.lab-steps li strong::before{content:counter(step);display:inline-grid;place-items:center;width:24px;height:24px;margin-right:8px;border-radius:50%;background:#11675d;color:#fff;font-size:.8rem}
.steps-note{font-size:.92rem;color:#506662;margin:10px 0 0}
.catalog-finder{display:flex;flex-wrap:wrap;align-items:end;gap:12px 14px;margin:0;padding:16px 18px;background:#fff;border:1px solid #d2dcd7;border-radius:12px}
.finder-field{display:grid;gap:4px;font-size:.92rem}.finder-search{flex:1 1 260px}.finder-search input{width:100%}
.finder-field select{min-width:170px}
.finder-clear{min-height:46px}
.catalog-finder .finder-status{flex-basis:100%;margin:0;font-size:.95rem;color:#405d70}
.catalog-finder .finder-status:empty{display:none}
.unit-bar{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);border-block:1px solid #d2dcd7;backdrop-filter:blur(6px)}
.unit-bar-inner{max-width:1180px;margin:auto;padding:8px 32px;display:flex;gap:12px;align-items:center}
.unit-nav{display:flex;gap:8px;list-style:none;margin:0;padding:2px 0;overflow-x:auto;scrollbar-width:thin;flex:1}
.unit-nav li{flex:0 0 auto;margin:0}
.unit-nav a,.to-top{display:inline-flex;align-items:center;min-height:44px;padding:6px 14px;border:1px solid #c4d2dc;border-radius:999px;background:#fff;font-weight:700;font-size:.92rem;text-decoration:none;white-space:nowrap}
.unit-nav a:hover,.to-top:hover{background:#eaf2fa}
.to-top{flex:0 0 auto;border-color:transparent;color:#506662}
.unit-tools{display:flex;justify-content:flex-end;gap:10px;margin:18px 0 0}
.unit-tools button{min-height:40px;padding:6px 14px;font-size:.88rem}
.catalog-unit{margin:18px 0;scroll-margin-top:80px;background:#fff;border:1px solid #d2dcd7;border-radius:14px}
.catalog-unit>summary{list-style:none;display:block;padding:16px 22px;border-radius:14px}
.catalog-unit>summary::-webkit-details-marker{display:none}
.catalog-unit>summary:hover{background:#f6f9f7}
.catalog-unit>summary h2{display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 12px;margin:0;font-size:1.45rem}
.catalog-unit>summary h2::before{content:"";align-self:center;width:10px;height:10px;border-right:3px solid #506662;border-bottom:3px solid #506662;transform:rotate(-45deg);transition:transform 150ms;margin-right:4px}
.catalog-unit[open]>summary h2::before{transform:rotate(45deg)}
.unit-number{color:#11675d}
.unit-count,.unit-progress{font-size:.92rem;font-weight:700;color:#506662}
.unit-progress:not(:empty){color:#145133;background:#e1f2e8;padding:2px 10px;border-radius:999px}
.catalog-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(310px,1fr));gap:16px;padding:4px 22px 22px}
.lab-card{position:relative;display:flex;flex-direction:column;background:#fff;border:1px solid #d2dcd7;border-top:6px solid var(--accent);border-radius:12px;padding:18px 20px;transition:box-shadow 150ms,transform 150ms}
.lab-card:hover,.lab-card:focus-within{box-shadow:0 6px 18px rgba(23,52,75,.12);transform:translateY(-2px)}
.card-top{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.lab-card-icon{display:grid;place-items:center;width:46px;height:46px;border-radius:12px;background:var(--sky);font-size:1.6rem;line-height:1}
.lab-card .lesson-label{margin:0;font-size:.9rem;font-weight:700;color:#405d70}
.card-badge{margin-left:auto;font-size:.78rem;font-weight:800;color:#6e4209;background:#fff2c6;padding:3px 10px;border-radius:999px}
.lab-card h3{font-size:1.3rem;margin:12px 0 6px}
.card-link{color:var(--ink);text-decoration:none}
.card-link::after{content:"";position:absolute;inset:0;border-radius:12px}
.card-link:focus-visible{outline:none}.lab-card:has(.card-link:focus-visible){outline:3px solid #ad4c00;outline-offset:3px}
.card-mission{margin:0 0 10px;font-size:.95rem;line-height:1.5}
.card-lessons{list-style:none;padding:0;margin:0 0 10px;display:grid;gap:2px;font-size:.88rem}
.card-lessons a{position:relative;z-index:1;color:#175da0;display:inline-block;padding:3px 0}
.card-tags{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 12px}
.card-tags .lesson-chip{min-height:30px;font-size:.8rem}
.card-foot{margin-top:auto;display:flex;align-items:center;gap:10px;padding-top:12px;border-top:1px solid #e0e7e1}
.card-progress{font-size:.88rem;font-weight:700;color:#506662}
.lab-card[data-status=done] .card-progress{color:#145133}
.card-meter{flex:1;max-width:120px;height:8px;background:#e5ecef;border-radius:999px;overflow:hidden}
.card-meter span{display:block;height:100%;background:var(--accent)}
.card-cta{margin-left:auto;font-weight:800;font-size:.95rem;color:var(--accent);white-space:nowrap}
.card-cta::after{content:" →"}
.lab-card[data-status=started]{border-left:4px solid #e0a106}
@media(max-width:900px){.lab-steps ol{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:600px){
.catalog-header{padding-top:14px}.labs-lead{font-size:1.08rem}
.lab-steps ol{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.lab-steps li{padding:9px 11px}
.labs-spotlight{padding:14px}.spotlight-groups{grid-template-columns:1fr}
.catalog-finder{padding:12px}.finder-field{flex:1 1 140px}.finder-field select{min-width:0;width:100%}
.unit-bar-inner{padding:6px 12px}.to-top{padding:6px 10px}
.catalog-unit>summary{padding:14px 16px}.catalog-unit>summary h2{font-size:1.2rem}
.catalog-grid{grid-template-columns:1fr;padding:2px 12px 14px}
.lab-card{padding:16px}}
@media(prefers-reduced-motion:reduce){.lab-card:hover,.lab-card:focus-within{transform:none}}
/* Lens: the second picture under a model (shared/lens.mjs). */
.model-lens{margin:18px 0 6px;padding:14px 18px 10px;background:#fff;border:1px solid var(--line);border-left:6px solid var(--accent);border-radius:4px 10px 10px 4px}
.model-lens h3{margin:0 0 4px;font-size:1.15rem}
.lens-controls{display:flex;flex-wrap:wrap;gap:10px 18px;align-items:flex-end;margin:8px 0 10px}
.lens-controls label{display:grid;gap:4px;font-weight:700;font-size:.92rem}
.lens-controls input[type=number]{width:9em;min-height:44px;padding:6px 10px;border:2px solid var(--line);border-radius:8px;font:inherit}
.lens-controls input[type=range]{min-height:44px;min-width:200px}
.lens-choice{display:flex;flex-wrap:wrap;gap:8px}
.lens-choice button[aria-pressed=true]{background:var(--accent);color:#fff;border-color:var(--accent)}
.lens-svg{display:block;width:100%;max-width:720px;height:auto;margin:6px 0}
.lens-svg line{stroke:var(--ink);stroke-width:2}.lens-svg line.heavy{stroke-width:4}.lens-svg line.heavy-alt{stroke:#a84820;stroke-width:4}
.lens-svg .tick{font-size:13px}.lens-svg .big{font-size:42px;font-weight:800}.lens-svg .ghost{fill:#6b7f8c}.lens-svg .on-fill{font-size:14px}
.lens-svg .outline{fill:none;stroke:var(--ink);stroke-width:2;stroke-dasharray:6 4}
.lens-svg .red{fill:#d65a4c;stroke:#8a1f14;stroke-width:1.5}.lens-svg .amber{fill:#fde7b0;stroke:#b8841a;stroke-width:1.5}
.lens-svg .ray{stroke:var(--accent);stroke-width:8}
.lens-svg .jug{fill:#fff;stroke:var(--ink);stroke-width:3}.lens-svg .juice{fill:#e0702a}
.lens-list{margin:6px 0 4px;padding-left:1.2em}.lens-list li{margin:4px 0;line-height:1.45}
.lens-table{border-collapse:collapse;margin:8px 0;width:100%;max-width:100%;font-size:.95rem}.lens-sr{position:absolute;width:1px;height:1px;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
.lens-table th,.lens-table td{padding:6px 10px;border:1px solid var(--line);text-align:left}
.lens-table caption{caption-side:top;text-align:left;font-weight:800;padding:0 0 6px}
.lens-table td.bad{background:#fdecea;color:#8a1f14;font-weight:800}
.lens-verdict{padding:10px 14px;margin:8px 0;border-left:5px solid var(--accent);background:var(--soft);font-weight:700}
.lens-verdict[data-verdict=good],.lens-verdict[data-open=true],.lens-verdict[data-ok=true]{border-color:var(--leaf);background:#edf7f1}
.lens-tape .lens-new,.lens-steps li{animation:lens-in 180ms ease-out}
.lens-steps{margin:8px 0;padding-left:1.4em}.lens-steps li{margin:4px 0}
@keyframes lens-in{from{transform:translateY(4px)}to{transform:none}}
@media(max-width:600px){.lens-table th,.lens-table td{padding:5px 6px;overflow-wrap:anywhere}}
@media print{.model-lens{break-inside:avoid}}
.lens-svg .shape{fill:#f9cf55;stroke:#84640c;stroke-width:1.5}.lens-svg .shape-alt{fill:#82c7df;stroke:#266580;stroke-width:1.5}.lens-svg .shape-light{fill:#d6e9f2;stroke:#47728c;stroke-width:2}
.lens-svg .point{fill:var(--accent);stroke:#fff;stroke-width:2}.lens-svg .point-alt{fill:#a84820;stroke:#fff;stroke-width:2}
.lens-svg text{fill:var(--ink);font-weight:700;font-size:15px}.lens-svg polygon{stroke:#47728c;stroke-width:2}
.lens-svg polygon.shape{fill:#f9cf55;stroke:#84640c}.lens-svg polygon.shape-alt{fill:#82c7df;stroke:#266580}.lens-svg polygon.shape-light{fill:#d6e9f2}

.model-picture.direct{cursor:pointer;touch-action:none;user-select:none;-webkit-user-select:none}
.model-picture.direct.dragging{cursor:grabbing}
.model-picture.direct svg{outline:2px dashed transparent;outline-offset:4px;border-radius:12px;transition:outline-color 150ms}
.model-picture.direct:hover svg{outline-color:var(--accent)}
.model-picture.direct.out-of-bounds svg{outline-color:#ad4c00}
.model-picture.direct.snap-back svg{outline-color:#176746}
.direct-hint{margin:6px 0 0;font-size:.92rem;font-weight:700;color:var(--accent)}

/* Rewards: star messages, the finished-lab stamp, and the passport on the index */
.cheer-toast{position:fixed;left:50%;bottom:22px;transform:translate(-50%,24px);max-width:min(560px,calc(100vw - 28px));padding:12px 18px;border-radius:14px;background:#17324d;color:#fff;font-weight:700;box-shadow:0 8px 24px #0004;opacity:0;pointer-events:none;transition:opacity 180ms,transform 180ms;z-index:60}
.cheer-toast.show{opacity:1;transform:translate(-50%,0)}
.lab-stamp{position:relative;overflow:hidden;display:flex;gap:22px;align-items:center;margin:18px 0;padding:22px 24px;border:3px solid var(--accent);border-radius:18px;background:#fff;box-shadow:0 10px 30px #0002}
.stamp-art{flex:none;display:grid;place-items:center;width:112px;height:112px;border-radius:50%;border:5px double var(--accent);background:color-mix(in srgb,var(--accent) 12%,#fff);transform:rotate(-8deg);animation:stampIn .55s cubic-bezier(.2,1.4,.4,1) both}
.stamp-art span{font-size:3rem}
.stamp-kicker{margin:0;font-weight:800;text-transform:uppercase;letter-spacing:.06em;font-size:.85rem;color:var(--accent)}
.stamp-copy h2{margin:.1em 0 .2em}
.stamp-link{font-weight:800;margin-right:14px;color:var(--accent)}
.stamp-close{min-height:44px;padding:6px 18px;border:2px solid var(--accent);border-radius:999px;background:#fff;color:var(--accent);font:inherit;font-weight:800;cursor:pointer}
.stamp-link:focus-visible,.stamp-close:focus-visible{outline:3px solid #f5a623;outline-offset:3px}
.stamp-confetti i{position:absolute;top:-12px;left:calc(var(--i)*5.5%);width:9px;height:14px;border-radius:2px;background:hsl(calc(var(--i)*43),80%,55%);animation:confetti 1.8s ease-in calc(var(--i)*60ms) both}
@keyframes stampIn{from{transform:scale(2.4) rotate(-30deg);opacity:0}to{transform:scale(1) rotate(-8deg);opacity:1}}
@keyframes confetti{to{transform:translateY(240px) rotate(540deg);opacity:0}}
@media(prefers-reduced-motion:reduce){.stamp-art,.stamp-confetti i{animation:none}.stamp-confetti{display:none}.cheer-toast{transition:none}}
@media(max-width:600px){.lab-stamp{flex-direction:column;text-align:center}}
@media print{.cheer-toast,.lab-stamp{display:none}}
.passport{margin:18px 0;padding:16px 18px;border:1px solid var(--line);border-radius:14px;background:#fff}
.passport h2{margin:0 0 4px;font-size:1.2rem}
.passport-count{margin:0 0 12px;color:var(--muted)}
.passport-grid{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(48px,1fr));gap:8px}
.stamp-slot{display:grid;place-items:center;width:48px;height:48px;border-radius:50%;border:2px dashed #9aa9b5;color:#9aa9b5;filter:grayscale(1);opacity:.55;font-size:1.4rem;text-decoration:none}
.stamp-slot.earned{border:3px double var(--accent);filter:none;opacity:1;background:color-mix(in srgb,var(--accent) 12%,#fff);transform:rotate(-6deg)}
.stamp-slot:focus-visible{outline:3px solid #f5a623;outline-offset:3px}

.practice-model{margin:14px 0;border:1px solid var(--line);border-radius:12px;background:#fff}
.practice-model>summary{min-height:48px;display:flex;align-items:center;padding:10px 16px;cursor:pointer;font-weight:800;color:var(--accent)}
.practice-model>summary:focus-visible{outline:3px solid #f5a623;outline-offset:3px}
.practice-model[open]>summary{border-bottom:1px solid var(--line)}
.practice-model-host{padding:12px 14px}

.model-challenge{margin:12px 0;padding:12px 16px;border:2px solid var(--accent);border-radius:14px;background:color-mix(in srgb,var(--accent) 8%,#fff)}
.model-challenge h3{margin:0 0 4px;font-size:1.05rem}
.mc-count{margin-left:8px;font-size:.85rem;font-weight:800;color:var(--accent)}
.mc-goal{margin:0;font-size:1.05rem}
.mc-target{font-size:1.25rem;color:var(--accent)}
.mc-status{margin:6px 0 0;min-height:2.8em;font-weight:800;color:#0d6b3a}
.model-challenge[data-state="solved"],.model-challenge[data-state="complete"]{background:#e8f7ee;border-color:#0d6b3a}
.model-challenge button{min-height:44px;margin-top:8px;padding:6px 18px;border:2px solid var(--accent);border-radius:999px;background:#fff;color:var(--accent);font:inherit;font-weight:800;cursor:pointer}
.model-challenge button:focus-visible{outline:3px solid #f5a623;outline-offset:3px}
@media print{.model-challenge{display:none}}

.predict-bar{margin:12px 0;padding:12px 16px;border:2px solid #0b7285;border-radius:14px;background:#eaf4fb}
.predict-bar h3{margin:0 0 4px;font-size:1.05rem}
.predict-bar p{margin:4px 0}
.predict-choices{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0}
.predict-choices button{min-height:48px;padding:6px 18px;border:2px solid #0b7285;border-radius:999px;background:#fff;color:#17344b;font:inherit;font-weight:800;cursor:pointer}
.predict-choices button[aria-pressed="true"]{background:#0b7285;color:#fff}
.predict-choices button:focus-visible{outline:3px solid #f5a623;outline-offset:3px}
.predict-result{min-height:3.2em;font-weight:800}
.predict-result[data-ok="true"]{color:#0d6b3a}
.predict-result[data-ok="false"]{color:#8a3a12}
.predict-score{font-size:.9rem;color:#17344b}
@media print{.predict-bar{display:none}}

.create-studio{margin:12px 0 18px;padding:12px 16px;border:2px solid var(--accent);border-radius:14px;background:color-mix(in srgb,var(--accent) 6%,#fff)}
.create-studio h3{margin:0 0 4px}
.create-actions{display:flex;flex-wrap:wrap;gap:10px;margin:10px 0 0}
.create-actions button{min-height:48px;padding:6px 18px;border:2px solid var(--accent);border-radius:999px;background:#fff;color:var(--accent);font:inherit;font-weight:800;cursor:pointer}
.create-actions button:focus-visible{outline:3px solid #f5a623;outline-offset:3px}
.create-note{min-height:1.5em;margin:6px 0 0;font-weight:700}

.mission-scene{margin:0 0 16px;border-radius:16px;overflow:hidden;border:1px solid var(--line);background:#102030}
.mission-scene svg{display:block;width:100%;height:auto;max-height:260px}
.mission-scene figcaption{padding:12px 16px;background:#fff;color:#17324d}
.mission-scene figcaption span{font-weight:800;color:#6a6a6a}
.mission-scene figcaption span.is-lit{color:var(--accent)}
@media print{.mission-scene svg{display:none}}

.watch-bar{display:flex;flex-wrap:wrap;gap:8px 14px;align-items:center;margin:0 0 10px}.watch-bar button{min-height:44px}.watch-note{font-weight:700;flex:1 1 220px}

/* Micro-HUD, 3-Tier Clue Drawer, Interactive Repair, Scratchpad, and Next-Gen Companions */
.micro-hud{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 16px;padding:10px 14px;margin:0 0 14px;background:#fff;border:1px solid var(--line);border-radius:12px}
.hud-progress-group{display:flex;flex-wrap:wrap;align-items:center;gap:8px 10px}
.hud-segments{display:inline-grid;grid-template-columns:repeat(6,16px);gap:4px;align-items:center}
.hud-seg{height:10px;border-radius:999px;background:#d6e2eb;border:1px solid #9db3c2;transition:background-color 160ms}
.hud-seg[data-status="done"]{background:var(--leaf);border-color:var(--leaf)}
.hud-seg[data-status="started"]{background:#f9cf55;border-color:#9a7210}
.streak-pill{display:inline-flex;align-items:center;padding:4px 12px;border-radius:999px;background:#edf6ef;color:#145133;font-weight:800;font-size:.85rem;border:1px solid #b5d9c2}
.hud-session-summary{margin:0;font-size:.88rem}
.hud-session-summary>summary{min-height:38px;padding:4px 10px;display:inline-flex;align-items:center}
.hud-metrics-list{margin:6px 0 0;padding:8px 14px 8px 26px;background:var(--soft);border-radius:8px;border:1px solid var(--line)}
.hud-actions{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.reset-guard-inline,.reset-guard{display:inline-flex;flex-wrap:wrap;align-items:center;gap:8px;padding:6px 10px;background:#fff8df;border:1px solid #c49514;border-radius:8px;font-size:.88rem;font-weight:700}

.direct-click-place{margin:10px 0;padding:10px 14px;background:#f4f8fa;border:1px solid var(--line);border-radius:10px;display:grid;gap:8px}
.click-place-row{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.click-place-label{font-size:.88rem;font-weight:800;color:#17344b;min-width:130px}
.click-place-chips{display:flex;flex-wrap:wrap;gap:6px}

.clue-tier-card{margin:10px 0;padding:12px 16px;background:#fff8df;border-left:5px solid #c49514;border-radius:4px 10px 10px 4px}
.clue-tier-card p{margin:4px 0;padding:0;background:transparent;border:0}
.clue-tier-kicker{font-size:.82rem;font-weight:800;text-transform:uppercase;letter-spacing:.05em;color:#6e4209}
.clue-diagram-wrap{margin:8px 0;overflow-x:auto}
.clue-diagram-wrap svg{display:block;max-width:100%;height:auto;border:1px solid #d6e1e9;border-radius:8px}

.repair-token{display:inline-block;padding:1px 5px;margin:0 1px;border-radius:4px;background:#e4f1f8;border:1px solid #82c7df;font-weight:700;cursor:pointer;transition:background-color 150ms}
.repair-token:hover,.repair-token.is-highlighted{background:#f9cf55;border-color:#84640c;color:#17344b}
.repair-stem-builder{margin:12px 0;padding:12px 16px;background:#f4f8fa;border:1px solid var(--line);border-left:5px solid var(--accent);border-radius:8px}
.repair-stem-row{display:grid;grid-template-columns:180px 1fr;gap:12px;align-items:end;margin-top:8px}
.repair-stem-row label{display:grid;gap:4px;font-size:.9rem}

.scratchpad-drawer,.teacher-radar-hud{position:fixed;right:16px;bottom:16px;width:min(600px,calc(100vw - 32px));max-height:calc(100vh - 32px);overflow-y:auto;z-index:55;padding:18px;background:#fff;color:#17344b;border:3px solid var(--accent);border-radius:16px;box-shadow:0 16px 42px rgba(23,52,75,.25)}
.scratchpad-header,.radar-head{display:flex;align-items:center;justify-content:space-between;gap:12px}
.scratchpad-header h2,.radar-head h3{margin:0;font-size:1.25rem}
.scratchpad-toolbar{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}
.scratchpad-stage{border:2px solid var(--line);border-radius:10px;overflow:hidden;background:#fff}
.scratchpad-stage svg{display:block;width:100%;height:auto;touch-action:none;cursor:crosshair}
.snapshot-submission-card{margin:14px 0;padding:14px 16px;background:#f4f8fa;border:1px solid var(--line);border-radius:12px}
.snapshot-submission-card h4{margin:0 0 10px}
.snapshot-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}
.snapshot-item{margin:0;padding:10px;background:#fff;border:1px solid var(--line);border-radius:8px}
.snapshot-svg-wrap svg{display:block;width:100%;height:auto;border:1px solid #e2ecf2;border-radius:6px}






.nextgen-card{margin:24px 0;padding:18px 20px;background:#fff;border:2px solid var(--line);border-top:6px solid var(--accent);border-radius:14px;max-width:100%;overflow:hidden}
.nextgen-kicker{margin:0 0 4px;font-size:.82rem;font-weight:800;text-transform:uppercase;letter-spacing:.06em;color:var(--accent)}
.nextgen-card h3{margin:0 0 8px;font-size:1.25rem}
.nextgen-card h4{margin:0 0 8px;font-size:1.02rem}
.byte-header{display:grid;grid-template-columns:120px minmax(0,1fr);gap:16px;align-items:center;margin-bottom:14px}
.byte-avatar-wrap svg{display:block;max-width:100%;height:auto;border:1px solid var(--line);border-radius:16px}
.byte-bug-switcher,.axiom-chips,.spatial-shape-tabs,.spatial-face-chips,.sg-glyph-bar,.mesh-actions-row,.spatial-ar-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px;max-width:100%}
.byte-steps-grid,.spatial-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin:14px 0}
.byte-panel{padding:12px;background:var(--soft);border:1px solid var(--line);border-radius:10px;min-width:0;max-width:100%}
.byte-panel svg,.mesh-plot-wrap svg,.spatial-svg-slot svg{display:block;width:100%;max-width:100%;height:auto;border:1px solid var(--line);border-radius:8px;margin:8px 0}
.byte-calc-lines{display:grid;gap:8px;min-width:0}
.byte-step-btn{text-align:left;background:#fff;color:#17344b;border:2px solid #9db3c2;font-weight:700;width:100%;white-space:normal;overflow-wrap:anywhere}
.byte-step-btn.is-selected{background:#fff8df;border-color:#ad4c00;color:#17344b}
.byte-frame-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:10px 0}
.byte-frame-grid label,.spatial-net-wrap label label,.sg-rewind-box label{display:grid;gap:5px;font-size:.9rem;min-width:0;max-width:100%}
.byte-frame-grid select,.repair-stem-row select,.repair-stem-row input,.nextgen-card input,.nextgen-card select{width:100%;min-width:0;max-width:100%}
.byte-status,.spatial-status,.sg-status,.mesh-copy-status{font-weight:700;color:#17344b;margin:8px 0 0;overflow-wrap:anywhere}

.spatial-viewport-wrap{position:relative;border:2px solid var(--line);border-radius:12px;overflow:hidden;background:#fff;display:grid;place-items:center;min-width:0;max-width:100%}
.spatial-canvas{display:block;width:100%;max-width:100%;height:auto;cursor:grab}
.spatial-camera-video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0}
.spatial-viewport-wrap .spatial-canvas{position:relative;z-index:1}
.spatial-net-wrap{min-width:0;max-width:100%}
.net-face-group{cursor:pointer}

.mesh-hash-pill{display:inline-block;padding:2px 10px;border-radius:8px;background:#eaf4fb;color:#075f80;border:2px solid #075f80;font-family:monospace;letter-spacing:.08em}
.sg-head{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:12px}
.sg-roles-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:12px 0}
.sg-role-btn{display:grid;gap:4px;text-align:left;min-height:48px;touch-action:manipulation;min-width:0;white-space:normal}
.sg-role-btn span{font-size:.85rem;font-weight:400}
.sg-rewind-box{padding:12px;background:var(--soft);border-radius:10px;margin:10px 0;min-width:0;max-width:100%}
.sg-handshake-row{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:10px}
.radar-list{padding-left:20px;margin:10px 0}
.radar-badge{display:inline-block;padding:2px 8px;border-radius:6px;font-size:.84rem;font-weight:800}
.radar-badge.ok{background:#e1f2e8;color:#145133}
.radar-badge.warn{background:#fff4df;color:#6e4209}

[data-theme="dark"]{--ink:#e8f1f7;--paper:#102231;--sky:#173247;--soft:#142b3d;--line:#325168;background:#0d1c29;color:#e8f1f7;color-scheme:dark}
[data-theme="dark"] #workspace,[data-theme="dark"] .micro-hud,[data-theme="dark"] .nextgen-card,[data-theme="dark"] .watch-card,[data-theme="dark"] .model-lens,[data-theme="dark"] .practice-model{background:#122636;color:#e8f1f7}
[data-theme="dark"] .tabs button[aria-selected="true"]{background:#122636;color:#7fd4f5}
[data-theme="dark"] svg text{fill:#17344b}

@media(max-width:900px){
  .byte-steps-grid,.spatial-grid,.byte-frame-grid,.sg-roles-grid,.repair-stem-row{grid-template-columns:minmax(0,1fr)}
  .byte-header{grid-template-columns:minmax(0,1fr)}
  .nextgen-card{padding:14px 12px}
}
@media print{.micro-hud,.scratchpad-drawer,.teacher-radar-hud,.nextgen-card,.direct-click-place{display:none!important}}
.lab-expedition-bar{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center}
.lab-plan{margin:8px 0;font-size:.95rem;color:#2f5568}
.es-line{display:block;font-style:italic;font-weight:500;margin-top:2px;opacity:.92}
.lab-summary{margin:6px 0;font-size:.95rem}
.lab-strategy{margin-top:14px;padding:12px 14px;border-radius:10px;background:#edf6ef;border-left:5px solid var(--leaf)}
.lab-strategy p{margin:0 0 6px;font-weight:700}
.lab-site-lit{animation:lab-lit .7s ease-out}
@keyframes lab-lit{from{opacity:.3}to{opacity:1}}
button[aria-pressed=true]{outline:3px solid #7c2d12;outline-offset:2px;font-weight:800}
.es-line{font-style:normal;opacity:1;color:inherit}
input[aria-invalid=true]{border-color:#b91c1c;box-shadow:0 0 0 2px #fecaca}
.model-error:not(:empty){padding:8px 12px;border-left:5px solid #b91c1c;background:#fef2f2;color:#7f1d1d}
.model-locked{margin:0 0 6px;font-size:.88rem;color:#425e70}
.lab-trail{margin-top:12px;padding:10px 14px;border-radius:10px;background:#f6fbfd;border:1.5px dashed #7198af}
.lab-trail p{margin:0 0 4px}.lab-trail ol{margin:0;padding-left:22px}
.lab-hints{margin:0;padding-left:22px}.lab-hints li{margin:4px 0}
/* The studios hand the host their reading settings (Comfort font and spacing) by inheritance, so the model follows the page. */
:host{font-family:inherit;line-height:inherit}
:host button,:host h3,:host h4,:host input,:host textarea,:host select{font-family:inherit}