:root{--ink:#173e3c;--teal:#125e5a;--lime:#d8f19e;--coral:#f97e61;--paper:#f5faf6;--muted:#58716c}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:Tahoma,Arial,sans-serif;font-size:16px;line-height:1.7}button,input{font:inherit}button{cursor:pointer;border:0;border-radius:14px;padding:12px 20px;font-weight:bold;background:white;color:var(--ink);transition:transform .15s,background .15s}button:hover{background:#e5f1e9;transform:translateY(-2px)}button:focus-visible,input:focus-visible,canvas:focus-visible{outline:3px solid #c55524;outline-offset:4px}button:disabled{cursor:default;opacity:.5;transform:none}header{max-width:1300px;margin:auto;display:flex;align-items:center;justify-content:space-between;padding:20px 30px;gap:20px}.brand{display:flex;align-items:center;gap:12px;background:transparent;text-align:right;padding:0;font-size:23px}.brand small{display:block;font-size:13px;color:var(--muted);font-weight:normal}.logo{background:var(--teal);border-radius:16px;padding:7px 12px;font-size:26px}nav{display:flex;gap:8px}nav button{background:transparent;padding:10px 13px;font-size:14px}main{max-width:1240px;margin:0 auto;padding:0 24px}footer{text-align:center;padding:24px;font-size:13px;color:var(--muted)}.hero{position:relative;min-height:600px;height:calc(100svh - 190px);max-height:800px;border-radius:30px;overflow:hidden;background:#dceddb url(hero.png) center/cover;display:flex;align-items:center;padding:50px;isolation:isolate}.hero:before{content:'';position:absolute;inset:0;background:linear-gradient(270deg,rgba(247,250,230,.94),rgba(245,249,229,.77) 30%,transparent 72%);z-index:-1}.heroText{width:48%;max-width:470px}.eyebrow{font-size:14px;font-weight:bold;letter-spacing:.5px;color:var(--teal)}h1{font-size:clamp(46px,6vw,78px);line-height:1.2;margin:18px 0;color:var(--teal)}.hero p{font-size:20px;max-width:340px}.primary{background:var(--teal);color:white;padding:15px 30px;box-shadow:0 7px 0 #0c4643}.primary:hover{background:#18716c}.secondary{background:#e3f1e7}.chips{display:flex;flex-wrap:wrap;gap:9px;margin:25px 0}.chip{background:#ffffffab;border:1px solid #fff;padding:5px 12px;border-radius:100px;font-size:14px}.heroCredit{margin-top:28px;font-size:15px}.heroCredit b{display:block}.heroBadge{position:absolute;bottom:25px;left:25px;background:#fff9;border:1px solid white;backdrop-filter:blur(12px);padding:12px 20px;border-radius:18px;font-size:14px}.screenTitle{display:flex;align-items:center;justify-content:space-between;gap:15px;margin:12px 0 22px}h2{font-size:30px;line-height:1.4;margin:10px 0}h3{margin:8px 0;font-size:21px}.sub{color:var(--muted)}.mapLayout{display:grid;grid-template-columns:1fr 1.2fr;gap:24px}.mapIntro{background:var(--teal);color:white;border-radius:25px;padding:30px;position:relative;overflow:hidden}.mapIntro h2{font-size:38px}.mapIntro p{color:#d7e9db}.mapIntro .mascot{height:210px;margin:20px auto}.stations{display:grid;gap:12px}.station{display:flex;align-items:center;gap:16px;text-align:right;padding:15px 20px;border:1px solid #dbe8df;border-radius:20px;background:white;box-shadow:0 3px 0 #e1ebe4}.station .num{width:44px;height:44px;display:grid;place-items:center;border-radius:50%;background:#ecf5ee;color:var(--teal);flex-shrink:0}.station.active{border:2px solid var(--teal)}.station.done .num{background:var(--lime)}.station small{font-weight:normal;display:block;color:var(--muted);font-size:14px}.station .end{margin-right:auto;font-size:22px}.stageLayout{display:grid;grid-template-columns:1fr 350px;gap:20px;direction:ltr}.stageLayout>*{direction:rtl}.playPanel{background:white;border:1px solid #dbe8df;border-radius:24px;padding:18px;min-width:0}.canvasWrap{position:relative;border-radius:18px;overflow:hidden;background:#fff3e9;aspect-ratio:1.65}canvas{display:block;width:100%;height:100%;touch-action:none}.gameTip{padding:10px 12px;background:#fff;border-radius:12px;position:absolute;right:10px;top:10px;max-width:80%;font-size:14px;box-shadow:0 3px 12px #33442210;pointer-events:none}.taskHead{display:flex;justify-content:space-between;align-items:center;margin:0 2px 12px;font-size:14px}.taskHead b{background:#e3f0e6;border-radius:30px;padding:4px 12px}.progressTrack{background:#edf3ee;height:8px;border-radius:10px;margin:12px 0;overflow:hidden}.progressFill{background:var(--teal);height:100%;width:0;transition:width .3s}.tools{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:15px}.tools button{font-size:15px;background:#e8f3ea;padding:10px 17px}.tools button.selected{background:var(--teal);color:white}.lesson{background:#e5f1e8;padding:23px;border-radius:24px}.lesson .organ{height:155px;margin:0 auto 12px}.lesson p{font-size:17px}.lesson .fact{background:#fff9;padding:14px;border-radius:14px;font-size:15px;margin:15px 0}.lesson .instruction{border-top:1px solid #c6dacf;padding-top:15px}.organ,.mascot{background-image:url(assets.png);background-repeat:no-repeat;background-size:300% 200%;width:210px;max-width:100%;aspect-ratio:1.2}.organ.o0{background-position:0 0}.organ.o1{background-position:50% 0}.organ.o2{background-position:100% 0}.organ.o3{background-position:0 100%}.organ.o4{background-position:50% 100%}.mascot{background-position:100% 100%}.quiz{background:white;border:1px solid #dbe8df;border-radius:24px;padding:30px;max-width:850px;margin:20px auto}.quiz h2{font-size:25px}.answers{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:25px 0}.answer{text-align:right;background:#f2f6f2;border:2px solid transparent;padding:18px}.answer.correct{background:#def1ca;border-color:#478144}.answer.wrong{background:#fff0e8;border-color:#db7750}.feedback{background:#edf5ed;padding:16px;border-radius:14px;margin:15px 0}.feedback:empty{display:none}.sortArea{display:flex;flex-wrap:wrap;gap:10px;margin:20px 0}.sortArea button{border:2px solid #d7e6dc;background:#fff}.orderSlots{display:flex;flex-wrap:wrap;gap:10px;direction:rtl}.slot{border:2px dashed #b3cdbc;padding:12px 17px;border-radius:15px;min-width:120px;background:#f2f8f2}.slot.filled{border-style:solid;border-color:var(--teal)}.summary{max-width:900px;margin:auto;text-align:center;background:white;border:1px solid #dbe8df;border-radius:24px;padding:35px}.trophy{font-size:65px}.scores{display:flex;gap:15px;justify-content:center;margin:25px 0;flex-wrap:wrap}.scoreBox{background:#edf5ed;padding:14px 25px;border-radius:17px}.scoreBox b{display:block;font-size:28px;color:var(--teal)}input{width:100%;max-width:400px;padding:14px 18px;border:1px solid #b9d0c0;border-radius:14px;background:#f7faf6;margin:12px 0}.certificate{margin:25px 0;padding:35px;border:6px double #94b98b;background:#fcfdf7;border-radius:8px}.certificate h2{color:var(--teal);font-size:34px}.certificate .student{font-size:30px;font-weight:bold;margin:20px}.certificate p{max-width:600px;margin:15px auto}.certificate small{color:var(--muted)}dialog{border:0;border-radius:25px;max-width:800px;width:calc(100% - 30px);max-height:85svh;box-shadow:0 30px 100px #123e3c44;padding:30px;color:var(--ink);background:var(--paper)}dialog::backdrop{background:#123e3c88;backdrop-filter:blur(4px)}.close{position:sticky;top:0;float:left;background:#e1eee4;font-size:26px;padding:2px 14px;z-index:2}.exploreGrid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.exploreCard{background:white;padding:18px;border-radius:17px}.exploreCard .organ{height:110px;width:150px;margin:auto}.exploreCard p{font-size:15px}.exploreCard button{font-size:14px;background:#e9f3e9}a{color:var(--teal)}#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);background:var(--ink);color:white;padding:12px 24px;border-radius:15px;z-index:10;display:none;max-width:90%;text-align:center}.stageTrail{display:flex;gap:8px;align-items:center;font-size:14px}.stageTrail span{width:27px;height:27px;display:grid;place-items:center;background:#dfece2;border-radius:50%}.stageTrail span.current{background:var(--teal);color:white}.stageTrail span.complete{background:var(--lime)}.pulse{animation:pulse 1.5s infinite}@keyframes pulse{50%{transform:scale(1.04)}}@media(max-width:850px){header{padding:15px 18px;flex-wrap:wrap;gap:8px}nav{width:100%;justify-content:space-between}nav button{padding:7px;font-size:13px}main{padding:0 14px}.hero{height:auto;min-height:650px;padding:25px;align-items:flex-start;background-position:35% center}.hero:before{background:linear-gradient(180deg,#f6faeae8 0%,#f6faeaaa 42%,transparent 75%)}.heroText{width:100%;max-width:none}.hero h1{font-size:52px;margin:12px 0}.hero p{font-size:18px}.heroCredit{margin-top:23px}.heroBadge{bottom:15px;left:15px;font-size:12px}.mapLayout{grid-template-columns:1fr}.mapIntro{padding:22px}.mapIntro h2{font-size:30px}.mapIntro .mascot{display:none}.stageLayout{grid-template-columns:1fr}.lesson{display:grid;grid-template-columns:80px 1fr;gap:10px;padding:18px}.lesson .organ{width:80px;height:80px;grid-row:1/4}.lesson h3,.lesson p{margin:0}.lesson p{font-size:15px}.lesson .fact,.lesson .instruction{grid-column:1/-1;margin:0}.canvasWrap{aspect-ratio:1.35}.gameTip{font-size:12px}.screenTitle h2{font-size:23px}.quiz{padding:20px}.answers{grid-template-columns:1fr}.summary{padding:20px}.certificate{padding:22px 12px}.exploreGrid{grid-template-columns:1fr}.tools button{font-size:14px;padding:9px 12px}.stageTrail{gap:4px}.slot{min-width:100px}footer{font-size:12px}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}@media print{body{background:white}header,footer,.summary> :not(.certificate),#toast,dialog{display:none!important}main,.summary{padding:0;border:0;max-width:none}.certificate{margin:30px auto;page-break-inside:avoid;max-width:900px}.certificate h2{font-size:34px}body *{-webkit-print-color-adjust:exact;print-color-adjust:exact}}
@media(max-width:850px){.screenTitle{flex-wrap:wrap;gap:10px}.screenTitle .stageTrail{order:3;width:100%}.taskHead{gap:10px;align-items:flex-start}.taskHead>span{font-size:14px;flex:1}.taskHead>b{flex-shrink:0}.certificate .student{overflow-wrap:anywhere}}
/* A fixed game viewport: the play surface and its actions share the available space. */
html{height:100%;overflow:hidden}body{height:100vh;height:100dvh;overflow:hidden;display:grid;grid-template-rows:auto minmax(0,1fr) auto;padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left)}header{width:100%;padding:10px 24px;gap:10px}.brand{font-size:20px}.brand small{font-size:12px}.logo{font-size:23px;padding:5px 10px}nav{gap:2px}nav button{padding:8px 10px}main#viewport{width:100%;max-width:1240px;padding:0;margin:auto;position:relative;overflow:hidden;height:100%;min-height:0}#app{position:absolute;top:0;right:0;transform-origin:top right;display:flex;flex-direction:column;gap:10px;padding:0 18px;min-height:0}#app>section{min-height:0}.screenTitle{flex:none;margin:0;gap:10px}.screenTitle h2{margin:0;font-size:26px}.screenTitle .eyebrow{font-size:12px}.screenTitle .chip{margin:0}footer{padding:7px 10px;font-size:12px;line-height:1.35}footer br{display:none}footer br:after{content:' · '}.hero{height:100%;min-height:0;max-height:none;flex:1;padding:28px 40px}.hero h1{font-size:clamp(42px,6vw,72px);margin:12px 0}.hero p{margin:10px 0}.chips{margin:18px 0}.heroCredit{margin-top:20px}.mapLayout{flex:1;min-height:0;gap:16px}.mapIntro{padding:22px}.mapIntro h2{font-size:32px}.mapIntro p{margin:12px 0}.mapIntro .mascot{height:min(23vh,185px);width:min(23vh,185px);margin:8px auto}.stations{min-height:0;grid-template-rows:repeat(5,minmax(0,1fr));gap:8px}.station{min-height:0;padding:9px 16px}.stageLayout{flex:1;min-height:0;grid-template-columns:minmax(0,1fr) 300px;gap:14px}.playPanel{display:flex;flex-direction:column;min-height:0;padding:14px;gap:8px}.taskHead{flex-shrink:0;margin:0;gap:10px}.taskHead>span{flex:1}.taskHead>b{flex:none}.canvasWrap{flex:1;min-height:0;aspect-ratio:auto}.progressTrack{flex:none;margin:0;height:8px}.tools{flex:none;margin:0;gap:6px}.tools button{padding:9px 14px;min-height:40px}.feedback{flex:none;margin:0;padding:12px;font-size:15px}.feedback p{margin:6px 0}.lesson{padding:18px;min-height:0;display:flex;flex-direction:column;gap:8px}.lesson .organ{width:140px;height:120px;flex-shrink:1;margin:0 auto}.lesson h3{font-size:19px;margin:0}.lesson p{font-size:15px;margin:0}.lesson .fact{font-size:14px;padding:10px;margin:0}.lesson .instruction{padding-top:8px}.lesson .instruction>p{display:none}.lesson button{padding:8px 12px;margin-top:6px}.taskComplete .canvasWrap,.taskComplete #controls,.taskComplete .progressTrack{display:none}.taskComplete #taskFeedback{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;background:#e8f3df;padding:25px;gap:15px}.taskComplete #taskFeedback b{font-size:28px}.taskComplete #taskFeedback p{max-width:520px;font-size:19px}.taskComplete #taskFeedback .primary{margin-top:15px}#app>.quiz{flex:1;min-height:0;width:100%;margin:0 auto;display:flex;flex-direction:column;justify-content:center;gap:10px;padding:20px 28px}#app>.quiz h2{margin:0}.answers{margin:6px 0;gap:9px}.answer{padding:13px 17px}.quiz .feedback{font-size:14px}.quiz .tools{margin-top:0}.quiz>p{margin:0}.sortArea{margin:0}.sortArea button{padding:8px 14px}.orderSlots{gap:6px}.slot{padding:8px 12px;min-width:110px;font-size:15px}.summary{width:100%;height:100%;margin:0 auto;padding:16px 25px;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:7px}.summary>p{margin:0;font-size:15px}.summary .trophy{font-size:40px;line-height:1}.summary h2{margin:0;font-size:27px}.scores{margin:6px 0;gap:10px}.scoreBox{padding:8px 17px;font-size:14px}.scoreBox b{font-size:24px}.summary input{margin:0;padding:9px 14px}.summary>br{display:none}.summary>.certificate{display:none}dialog .certificate{display:block;margin:0;padding:20px}dialog{overscroll-behavior:contain}.gameTip{font-size:13px;padding:5px 10px}#fullscreen{white-space:nowrap}
@media(max-width:850px){header{padding:7px 14px;gap:4px}.brand{font-size:18px}.brand small{display:none}.logo{font-size:20px;border-radius:12px}nav{width:auto;margin-right:auto;flex-wrap:wrap;justify-content:flex-end}nav button{font-size:12px;padding:6px 8px}#about{display:none}#app{padding:0 10px;gap:7px}footer{font-size:10px;padding:5px;line-height:1.3}.hero{padding:22px;min-height:0;height:100%;background-position:35% center}.hero h1{font-size:48px}.hero p{font-size:17px;max-width:290px}.heroCredit{font-size:13px;margin-top:16px}.heroBadge{font-size:11px;padding:6px 10px}.hero .chips{margin:13px 0;gap:5px}.chip{font-size:12px;padding:4px 8px}.mapLayout{grid-template-columns:1fr}.mapIntro{display:none}.station{padding:8px 14px;font-size:16px}.station small{font-size:13px}.station .num{width:34px;height:34px}.stageLayout{grid-template-columns:minmax(0,1fr)}.lesson{display:none}.screenTitle h2{font-size:21px}.screenTitle button{font-size:13px;padding:7px 13px}.screenTitle .stageTrail{order:0;width:auto;gap:3px}.stageTrail span{width:22px;height:22px;font-size:11px}.playPanel{padding:10px;gap:7px}.taskHead>span{font-size:14px;line-height:1.5}.taskHead b{font-size:12px;padding:3px 8px}.tools button{font-size:13px;padding:8px 10px}.gameTip{font-size:11px;top:6px;right:6px;max-width:95%}.taskComplete #taskFeedback{padding:16px;gap:10px}.taskComplete #taskFeedback b{font-size:23px}.taskComplete #taskFeedback p{font-size:17px}#app>.quiz{padding:16px;gap:8px}.quiz h2{font-size:21px}.answers{grid-template-columns:1fr;gap:7px}.answer{padding:10px 13px;font-size:15px}.quiz .feedback{padding:9px;font-size:13px}.quiz .feedback p{margin:3px 0}.orderSlots{display:grid;grid-template-columns:1fr 1fr;gap:5px}.slot{font-size:13px;padding:6px;min-width:0}.sortArea{gap:5px}.sortArea button{font-size:13px;padding:6px 9px}.quiz .tools button{font-size:12px;padding:7px 9px}.summary{padding:14px;gap:6px}.summary h2{font-size:23px}.summary>p{font-size:13px}.summary .trophy{font-size:33px}.summary .scores{gap:5px}.scoreBox{padding:7px 10px;font-size:12px}.scoreBox b{font-size:21px}.summary .tools{gap:5px}.summary .tools button{font-size:12px;padding:8px}.summary label{font-size:14px}}
@media(max-height:540px){header{padding-top:3px;padding-bottom:3px}.brand small{display:none}footer{font-size:10px;padding:3px}.screenTitle h2{font-size:20px}.screenTitle .eyebrow{display:none}.hero{padding:15px 30px;align-items:center}.heroText{width:60%}.hero h1{font-size:36px;margin:6px 0}.hero p{font-size:15px;margin:5px 0}.hero .chips{margin:8px 0}.heroCredit{margin-top:9px;font-size:12px}.hero button{padding:9px 18px}.heroBadge{display:none}.lesson{display:none}.stageLayout{grid-template-columns:1fr}.taskHead>span{font-size:12px}.tools button{padding:5px 10px;min-height:30px}.playPanel{padding:8px;gap:5px}.mapIntro{display:none}.mapLayout{grid-template-columns:1fr}.station{padding:4px 12px}.station small{display:none}.stations{gap:4px}.station .num{width:27px;height:27px}.answers{grid-template-columns:repeat(3,1fr)}.quiz .answer{padding:7px;font-size:13px}#app>.quiz{gap:5px;padding:12px}.quiz h2{font-size:19px}.orderSlots{display:flex}.sortArea button,.slot{font-size:12px;padding:5px 8px}.summary>p{font-size:12px}.summary .trophy{display:none}.summary .scores{margin:0}.summary .scoreBox{padding:3px 12px}.summary input{padding:5px 10px}.summary{gap:3px}}
@media print{html,body{height:auto;display:block;overflow:visible}main#viewport,#app{position:static!important;width:100%!important;height:auto!important;overflow:visible!important;transform:none!important;padding:0!important}.summary{height:auto;display:block}.summary>.certificate{display:block!important}.summary>br{display:none}}

/* Keep anatomical drawings proportional on tall phone screens. */
#gameCanvas{object-fit:contain}.canvasWrap{background:linear-gradient(135deg,#fff7eb,#e2f1e8)}