/* SPDX-License-Identifier: MIT. An original field-trip design for SSR. */
:root{color-scheme:light;--paper:#f6f1e7;--card:#fffdf8;--ink:#202c2b;--muted:#526360;--teal:#08695e;--line:#d6d8cb;--mint:#d9eee3;--gold:#f5cd76;--mono:Consolas,ui-monospace,monospace;--serif:Georgia,'Palatino Linotype',serif}
*{box-sizing:border-box}html{scroll-padding-top:24px}body{margin:0;background:radial-gradient(ellipse at 95% 4%,#e0eee3,transparent 36%),var(--paper);color:var(--ink);font:16px/1.65 'Segoe UI',system-ui,sans-serif}button,input,select{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button,select,summary{cursor:pointer}a{color:var(--teal);text-underline-offset:4px}a:hover{text-decoration-thickness:2px}button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible,[tabindex]:focus-visible{outline:3px solid #168a7d;outline-offset:4px}[hidden]{display:none!important}button:disabled{opacity:.5;cursor:default}button,select{min-height:44px}button{border:1px solid var(--line);border-radius:9px;background:var(--card);padding:8px 14px;color:var(--ink)}button:hover:not(:disabled){border-color:var(--teal);background:#e6f0e9}input{accent-color:var(--teal)}.primary{display:inline-flex;align-items:center;justify-content:center;gap:16px;min-height:46px;background:var(--teal);border:1px solid var(--teal);border-radius:10px;color:white;padding:11px 20px;text-decoration:none;font-weight:650}.primary:hover:not(:disabled){background:#07554c;color:white}.skip{position:absolute;top:-100px;left:20px;background:white;padding:14px;z-index:9}.skip:focus{top:12px}.lesson-nav,.lesson-hero,main,.lesson-footer{width:min(1160px,calc(100% - 64px));margin-inline:auto}.lesson-nav{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:24px 0;border-bottom:1px solid var(--line);font-size:14px}.lesson-nav a{text-decoration:none}.brand{font-weight:650;color:var(--ink)}.brand span{font-weight:400;color:var(--muted);margin-left:16px}.lesson-hero{display:grid;grid-template-columns:1fr 250px;gap:50px;align-items:center;padding:46px 0 38px}.eyebrow{font:600 12px/1.5 var(--mono);letter-spacing:.06em;color:var(--teal);margin:0 0 12px}h1,h2,h3,p{margin-top:0}h1{font:500 clamp(38px,4.2vw,58px)/1.12 var(--serif);letter-spacing:-.04em;margin-bottom:20px}h1 em,h2 em{font-style:normal;color:var(--teal)}h2{font:500 clamp(26px,3vw,37px)/1.2 var(--serif);letter-spacing:-.025em;margin-bottom:16px}h3{font-size:17px}p{margin-bottom:16px}.lede{font-size:18px;line-height:1.65;max-width:650px;color:var(--muted);margin-bottom:15px}.lesson-meta{font-size:13px;color:var(--muted);margin:0}.lesson-meta span{padding:0 6px}.visit-card{position:relative;padding:26px 26px 24px;background:var(--card);border:1px solid var(--line);border-radius:5px 28px 5px 5px;box-shadow:4px 7px 0 #d7e1d4;transform:rotate(2deg);font-size:14px}.visit-card ol{padding-left:20px;margin:14px 0 18px}.visit-card li{padding:3px 0}.visit-card a{font-size:13px}.route-mark{position:absolute;right:24px;top:10px;color:var(--teal);font-size:32px}.experience{border:1px solid #c3d1c3;border-radius:22px;background:#eaf0e6;padding:24px;box-shadow:0 16px 45px #223d2610}.experience-head{display:flex;justify-content:space-between;align-items:center;gap:20px}.experience-head h2{margin-bottom:4px;font-size:30px}.experience-head .eyebrow{margin-bottom:6px}.mode{display:inline-block;border:1px solid #abc7b7;border-radius:99px;padding:6px 12px;font-size:12px;color:#214f40;background:#f7fcf7;white-space:nowrap;margin:0}.plain-note{color:var(--muted);font-size:13px;margin:12px 0 18px}.toolbar{display:flex;align-items:center;flex-wrap:wrap;gap:12px;margin-bottom:18px;font-size:14px}.toolbar select{background:var(--card);color:var(--ink);border:1px solid #bccabc;border-radius:9px;padding:8px 30px 8px 12px}.slow{display:flex;gap:8px;align-items:center;margin-left:auto;padding:8px}.slow input{width:18px;height:18px}#stage{display:grid;grid-template-columns:1.07fr 1fr;gap:16px;align-items:stretch}.panel{min-width:0;border-radius:15px;padding:20px;background:var(--card);border:1px solid var(--line)}.panel-heading{display:flex;justify-content:space-between;gap:14px;align-items:baseline;font-size:12px;color:var(--muted)}.panel-heading h3{font-size:15px;margin:0}.panel-heading span{font-size:12px}.sub{font-size:13px;margin:4px 0 12px;color:var(--muted)}#map-box{position:relative}#map{display:block;width:100%;height:270px;overflow:visible}.edge{fill:none;stroke:#a79881;stroke-width:3}.edge.return{stroke-dasharray:7 7}.node rect{fill:#f0eee3;stroke:#c8cabb;stroke-width:1.5}.node.hot rect{fill:#d0eade;stroke:var(--teal);stroke-width:2}.node text{font:600 21px var(--mono);fill:var(--ink)}.node .small{font:16px 'Segoe UI',sans-serif;fill:var(--muted)}#token{position:absolute;width:46px;height:46px;margin:-23px 0 0 -23px;border:2px solid var(--teal);border-radius:50%;background:#b7dfc6;box-shadow:0 4px 0 #40735c40;z-index:2;padding:0;font-size:22px;line-height:1;transition:left .6s ease,top .6s ease}#token:hover{background:var(--gold)}#photo{border:1px dashed #bfcaba;border-radius:12px;overflow:hidden;min-height:125px;margin:10px 0 0;background:#f0f1e7;text-align:center;display:grid;place-items:center}#photo p{color:var(--muted);margin:20px;font-size:15px}#photo p span{font-size:13px}#photo img{max-height:220px;max-width:100%;width:100%;object-fit:contain;display:block;background:#182c28}#photo figcaption{font-size:12px;padding:8px}#board{background:#172c29;color:#edf4ea;border-color:#172c29;display:flex;flex-direction:column}#board .panel-heading,#board .sub{color:#b6c8be}#board h3{color:var(--gold)}#log{list-style:none;margin:12px 0 0;padding:0;overflow:auto;height:395px;scrollbar-color:#668c7e #172c29;scrollbar-width:thin}#log li{display:grid;grid-template-columns:58px minmax(0,1fr);gap:10px;background:#213b35;border:1px solid #335147;border-radius:10px;padding:12px;margin-bottom:10px;font-size:13px}#log .empty-log{display:block;color:#d8e5d9;background:transparent;border:1px dashed #4c6b5e;margin-top:28px;padding:30px 20px;text-align:center;font-family:var(--serif);font-size:24px}#log .empty-log span{display:block;font:13px 'Segoe UI',sans-serif;color:#b6c8be;margin-top:10px}.kind{font:11px var(--mono);color:#eddb9c;padding-top:3px}.TOOL{color:#a7e3c2}.RESULT{color:#d5bbf4}.ERROR{color:#ffb7a4}#log .detail{color:#d1dfd4;margin:5px 0 0;overflow-wrap:anywhere}#log pre{white-space:pre-wrap;overflow-wrap:anywhere;font:11px/1.6 var(--mono);color:#b6e3cb}#log strong{font-weight:600}.playback{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;margin-top:16px}.playback p{font:12px var(--mono);margin:0}.playback>div{display:flex;flex-wrap:wrap;gap:6px}.playback button{font-size:13px;padding:8px 13px}.journey{display:grid;grid-template-columns:repeat(6,1fr);list-style:none;padding:0;margin:22px 0 0;border-top:1px solid #c1cec0}.journey li{padding:12px 5px 4px;font-size:12px;color:var(--muted);border-top:3px solid transparent;position:relative;top:-2px}.journey li span{display:block;font:11px var(--mono);margin-bottom:2px}.journey li.current{color:var(--teal);border-color:var(--teal);font-weight:650}.sample-row{font-size:12px;margin-top:18px;color:var(--muted)}.sample-row p{margin:0}.sample-row button{font-size:12px;min-height:32px;background:transparent;text-decoration:underline;border:0;padding:0 4px;color:var(--teal)}.notice{padding:15px;border:1px solid var(--line);border-radius:8px}#collection-wrap{margin-top:25px;border-top:1px solid var(--line);padding-top:18px}#collection-wrap p{font-size:12px;color:var(--muted)}#clear-collection{font-size:12px}#collection{display:flex;gap:12px;overflow:auto;padding:4px 2px 16px}.polaroid{flex:0 0 88px;margin:0;padding:7px;background:var(--card);border:1px solid var(--line);transform:rotate(-2deg);box-shadow:0 4px 8px #243e2220}.polaroid:nth-child(even){transform:rotate(2deg)}.polaroid img{width:72px;height:62px;object-fit:cover}.polaroid figcaption{font-size:10px;text-align:center;overflow-wrap:anywhere}.discovery,.challenge,.learn-more{display:grid;grid-template-columns:1fr 1fr;gap:55px;padding:64px 0;border-bottom:1px solid var(--line);align-items:start}.discovery p,.challenge p,.learn-more p{color:var(--muted)}.evidence-url{font:12px/1.7 var(--mono);overflow-wrap:anywhere;background:#e8ede2;padding:15px;border-radius:8px}.question-card{border:1px solid var(--line);background:var(--card);padding:26px;border-radius:18px;box-shadow:0 7px 0 #e3e4d6}.question-card fieldset{border:0;margin:0 0 14px;padding:0}.question-card legend{font:23px/1.3 var(--serif);margin-bottom:16px}.question-card label{display:flex;align-items:baseline;gap:10px;padding:12px 0;font-size:14px;cursor:pointer}.question-card input{flex:0 0 auto}.question-card [role=status]{font-size:14px;background:#e2f1e5;border-radius:8px;padding:15px;margin:16px 0 0}.challenge{padding-top:45px}.mask-switch{display:flex;align-items:center;gap:12px;font-weight:600;padding:12px 0;cursor:pointer}.mask-switch input{width:20px;height:20px}.response-card{background:#172c29;color:#eef6ee;border-radius:16px;padding:24px}.response-card .eyebrow{color:var(--gold)}.response-card pre{white-space:pre-wrap;overflow-wrap:anywhere;font:13px/1.7 var(--mono)}.response-card p:last-child{color:#c8ddce;border-top:1px solid #4c6256;padding-top:16px;font-size:14px;margin-bottom:0}#try{padding:55px 0;border-bottom:1px solid var(--line)}#try>p{max-width:750px;color:var(--muted)}#try .eyebrow{color:var(--teal)}.code-choice{border:1px solid var(--line);border-radius:12px;background:var(--card);margin:12px 0;overflow:hidden}.code-choice summary{padding:16px 20px;font-weight:650}.code-choice summary span{font-weight:400;color:var(--muted);font-size:13px;margin-left:14px}.snippet{position:relative;background:#172c29;color:#edf3e9;padding:52px 22px 22px}.snippet pre{font:13px/1.8 var(--mono);overflow:auto;margin:0}.copy-btn{position:absolute;right:12px;top:10px;background:#2b4840;color:white;border-color:#547565;font-size:12px;min-height:32px;padding:4px 12px}.learn-more{padding-top:50px}.learn-more dl{margin:0}.learn-more dt{font-weight:650}.learn-more dd{margin:5px 0 20px;color:var(--muted);font-size:14px}.learn-more dd a{display:block;margin-top:5px}.teacher-invite{display:flex;align-items:center;justify-content:space-between;gap:40px;background:#dbeadf;border:1px solid #b6cbbb;border-radius:18px;padding:36px;margin:45px 0 25px}.teacher-invite p{max-width:580px;color:#3e5a4b;margin-bottom:0}.teacher-invite .eyebrow{color:var(--teal);margin-bottom:10px}.teacher-invite a{flex-shrink:0}.privacy{font-size:13px;margin:30px 0;color:var(--muted)}.privacy summary{padding:10px 0;color:var(--ink)}.privacy p{max-width:900px}.lesson-footer{padding:30px 0 40px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}.lesson-footer p{max-width:850px;margin-bottom:10px}
@media(max-width:860px){.lesson-hero{grid-template-columns:1fr 210px;gap:24px}#stage{grid-template-columns:1fr}#map{height:270px}#log{height:300px}.discovery,.challenge,.learn-more{gap:28px}.teacher-invite{align-items:start;flex-direction:column;gap:20px}.toolbar .slow{margin-left:0}}
@media(max-width:600px){.lesson-nav,.lesson-hero,main,.lesson-footer{width:calc(100% - 32px)}.lesson-nav{padding:18px 0;font-size:12px}.brand span{display:block;margin:0;font-size:11px}.lesson-hero{display:block;padding:30px 0}.visit-card{display:none}h1{font-size:38px;line-height:1.16}.lede{font-size:16px}.lesson-meta{font-size:12px}.experience{padding:16px;border-radius:16px}.experience-head{display:block}.experience-head h2{font-size:27px}.mode{margin-top:12px}.toolbar{gap:9px}.toolbar>label:first-child{width:100%}.toolbar .slow{width:100%;font-size:13px;padding:0}.panel{padding:14px}.panel-heading span{font-size:11px}#map{height:235px}.node text{font-size:27px}.node .small{font-size:23px}#token{width:34px;height:34px;min-height:34px;margin:-17px 0 0 -17px;font-size:19px}.sub{font-size:12px}#photo img{max-height:200px}.playback>div{width:100%}.playback button{flex:1;padding:8px;font-size:12px}.journey li{font-size:10px;padding-inline:1px}.journey li span{font-size:10px}.discovery,.challenge,.learn-more{grid-template-columns:1fr;gap:22px;padding:38px 0}.question-card{padding:21px}h2{font-size:29px}.code-choice summary span{display:block;margin:5px 0 0}.snippet{padding-inline:15px}.snippet pre{font-size:12px}#try{padding:38px 0}.teacher-invite{padding:25px;margin-top:30px}.sample-row button{min-height:44px}#log li{grid-template-columns:48px minmax(0,1fr);gap:6px;padding:10px}.kind{font-size:10px}}
@media(prefers-reduced-motion:reduce){#token{transition:none}html{scroll-behavior:auto}}
@media print{body{background:white}.lesson-nav,.toolbar,.playback,.sample-row,.question-card,.privacy,#collection-wrap,#token,.copy-btn{display:none!important}.lesson-hero,main,.lesson-footer{width:100%}.lesson-hero{padding:15px 0;display:block}.visit-card{display:none}.experience{box-shadow:none;border:1px solid #aaa}.discovery,.challenge,.learn-more{display:block;padding:20px 0}.teacher-invite{background:white}.panel,#board,.response-card,.snippet{color:#111;background:white}#log{height:auto;max-height:none}.lesson-footer{font-size:10px}}

/* Pip keeps the original small-face style and follows the existing map controls. */
.hero-shortcut{font-size:14px;margin:0 0 16px}.lesson-hero{padding-top:32px;padding-bottom:28px}.lesson-hero h1{font-size:clamp(36px,4vw,54px)}
#token{border-color:#87621f;background:var(--gold);border-radius:15px;min-height:44px;width:46px;height:46px}#token:hover{background:#ffe0a0}.pip-face{display:block;width:100%;height:100%;fill:var(--ink)}.pip-mouth{fill:none;stroke:var(--ink);stroke-width:3;stroke-linecap:round}#token:active .pip-face{transform:translateY(-3px) rotate(-6deg)}#token[data-busy="true"] .pip-mouth{d:path("M25 41 Q32 37 39 41")}
.take-home{display:grid;grid-template-columns:1.2fr 1fr;gap:32px;padding:28px;border:1px solid #bacbbc;border-radius:18px;background:var(--card);margin:24px 0}.take-home ol{margin:0;padding-left:22px}.take-home li{padding:0 0 12px 4px}.take-home p:last-child{margin-bottom:0}.download-actions{display:flex;gap:18px;align-items:center;flex-wrap:wrap}.download-actions>a:last-child{font-size:14px}.make-next{padding:16px 20px;border-left:3px solid var(--teal);background:#e9eee4}.research-bridge{padding:40px 0;border-bottom:1px solid var(--line)}.research-bridge p{max-width:720px;color:var(--muted)}
@media(max-width:600px){.lesson-hero{padding:22px 0}.lesson-hero h1{font-size:36px;margin-bottom:14px}.hero-shortcut{font-size:13px}.take-home{grid-template-columns:1fr;padding:20px;gap:20px}#token{width:44px;height:44px;min-height:44px;margin:-22px 0 0 -22px}.research-bridge{padding:30px 0}}
@media(prefers-reduced-motion:reduce){#token:active .pip-face{transform:none}}