@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@400;500;600;700;900&display=swap');
:root{color-scheme:dark;--bg:#102d3b;--panel:#173a47;--ink:#eaf2e8;--muted:#aac3c7;--gold:#efbd70;--line:#31545d;--mint:#82c7b3}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:'Noto Sans TC',system-ui,sans-serif;font-size:15px}button,input,select{font:inherit}button,a,input,select{ -webkit-tap-highlight-color:transparent}button{cursor:pointer;border:1px solid var(--line);border-radius:12px;min-height:48px;padding:10px 16px;color:var(--ink);background:#214754;font-weight:600;transition:background .15s,transform .15s}button:hover{background:#315c66}button:active{transform:translateY(1px)}button:disabled{opacity:.45;cursor:not-allowed}button.primary{background:var(--gold);color:#283b3c;border-color:var(--gold)}button.primary:hover{background:#fbd298}button.ghost{background:transparent}button.danger{color:#ffb8a5}a{color:var(--mint)}input,select{min-height:48px;border:1px solid #53717a;border-radius:10px;background:#102e3a;color:var(--ink);padding:9px 12px;width:100%}input:focus,select:focus,button:focus-visible{outline:3px solid var(--gold);outline-offset:2px}input[type=checkbox]{width:24px;min-height:24px;accent-color:var(--gold)}label{display:block;color:#c6d9d6;font-size:13px}label input,label select{margin-top:7px}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(32px,4.5vw,62px);letter-spacing:.03em;line-height:1.2}h2{font-size:23px}h3{font-size:17px}p{line-height:1.7}.muted{color:var(--muted)}.eyebrow{color:var(--gold);font-size:12px;font-weight:700;letter-spacing:.18em}.pill{display:inline-flex;padding:6px 12px;border:1px solid var(--line);border-radius:99px;font-size:12px;color:var(--muted);gap:6px;align-items:center}.topbar{display:flex;align-items:center;justify-content:space-between;padding:17px 28px;border-bottom:1px solid var(--line);gap:15px}.brand{font-weight:900;font-size:22px;display:flex;align-items:center;gap:10px}.brand img{width:38px}.top-meta{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.lobby{max-width:1220px;margin:auto;padding:30px}.hero{display:grid;grid-template-columns:1fr 1.5fr;gap:32px;align-items:center;padding:24px 0}.hero p{color:var(--muted);max-width:370px}.hero h1 span{color:var(--gold)}.island-svg{width:100%;display:block;filter:drop-shadow(0 14px 20px #081e2666)}.district{cursor:pointer}.district:focus{outline:none}.district:focus ellipse,.district:hover ellipse{stroke-width:4}.entry-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:18px;margin:20px 0}.card{background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:22px}.card .row{margin:12px 0}.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.row>*{flex:1}.card button.wide{width:100%}.intro-strip{display:flex;justify-content:space-between;gap:12px;padding:18px 2px;border-bottom:1px solid var(--line);color:var(--muted)}.intro-strip b{color:var(--ink)}.shell{max-width:1600px;margin:0 auto;padding:20px;display:grid;grid-template-columns:minmax(0,1.35fr) minmax(380px,1fr);gap:20px}.map-panel{position:relative}.map-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.map-heading h2{margin:0}.zone-nav{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin:16px 0}.zone-nav button{padding:10px 5px;font-size:12px;background:#163946;display:flex;flex-direction:column;gap:5px;align-items:center;border-bottom:3px solid var(--z)}.zone-nav button.active{background:#31535a;color:#ffe2a5}.zone-nav .emoji{font-size:23px}.workspace{align-self:start;position:sticky;top:12px}.workspace h2{margin:8px 0}.work-svg{width:100%;background:#102e3b;border:1px solid var(--line);border-radius:14px;display:block;max-height:285px}.mission{border-left:3px solid var(--gold);padding:12px 14px;background:#214451;border-radius:0 12px 12px 0;margin:14px 0;font-size:14px;line-height:1.8}.fields{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:16px 0}.fields label{font-size:12px}.field-control{display:flex;align-items:center;gap:3px;margin-top:5px}.field-control input{margin:0;min-width:0;text-align:center;padding:7px 3px}.field-control button{padding:0;min-width:34px;border-radius:9px;font-size:18px}.fields.scale-fields{grid-template-columns:repeat(3,minmax(0,1fr))}.evidence-list{display:grid;gap:8px;margin:14px 0}.evidence-list label{display:flex;align-items:center;gap:12px;border:1px solid var(--line);padding:10px;border-radius:12px;min-height:48px;cursor:pointer;font-size:14px}.evidence-list input{margin:0;flex-shrink:0}.feedback{padding:13px 15px;border-radius:12px;background:#234a44;color:#b9e7bd;margin:12px 0;line-height:1.7}.feedback.error{background:#593b38;color:#ffccbe}.feedback:empty{display:none}.actions{display:flex;gap:8px;flex-wrap:wrap}.actions button{flex:1}.feed{margin-top:16px}.feed-row{display:flex;gap:12px;padding:11px 0;border-bottom:1px solid var(--line);font-size:13px}.feed-row button{min-height:40px;padding:5px 10px}.feed-row .detail{flex:1}.feed-row small{display:block;color:var(--muted);margin-top:4px}.public-board{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:14px 0}.order{border:1px solid var(--line);border-radius:13px;padding:14px;background:#153843}.order strong{display:block;color:var(--gold);font-size:20px}.order button{width:100%;margin-top:10px}.score-list{display:grid;gap:8px}.score-item{display:flex;justify-content:space-between;align-items:center;padding:10px 12px;background:#173a47;border-radius:10px;font-size:13px}.score-item.me{border:1px solid var(--gold)}.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.stat{padding:14px;background:#123441;border:1px solid var(--line);border-radius:13px}.stat b{font-size:24px;display:block;color:var(--gold)}.teacher-tools{margin-bottom:16px}.stage-track{display:flex;gap:7px;margin:12px 0}.stage-track span{flex:1;padding:8px;text-align:center;background:#173642;border-radius:8px;font-size:12px}.stage-track .done{background:#36665a}.stage-track .current{border:1px solid var(--gold);color:var(--gold)}.timer{font-size:20px;color:var(--gold);font-variant-numeric:tabular-nums;font-weight:700}.small{font-size:12px}.empty{color:var(--muted);padding:24px;text-align:center;border:1px dashed var(--line);border-radius:14px}.report{max-height:420px;overflow:auto}table{width:100%;border-collapse:collapse;font-size:13px}td,th{text-align:left;padding:12px;border-bottom:1px solid var(--line)}#toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:#efe3c9;color:#243b40;padding:14px 22px;border-radius:14px;box-shadow:0 10px 40px #0005;z-index:20;max-width:90vw;display:none}.assembled{animation:assemble .65s ease-out;transform-box:fill-box;transform-origin:bottom}.badge-success{color:var(--mint)}.waiting{text-align:center;padding:36px 10px}.qr{background:#fff;padding:12px;border-radius:12px;display:inline-block}.qr svg{width:140px;height:140px}.scroll-list{max-height:280px;overflow:auto}.modal-shade{position:fixed;inset:0;background:#061e29cf;z-index:15;display:grid;place-items:center;padding:20px}.modal{width:min(630px,100%);max-height:90vh;overflow:auto}.footer{font-size:12px;color:var(--muted);margin:25px 0;text-align:center}.hidden{display:none!important}@keyframes assemble{from{opacity:0;translate:0 -16px}to{opacity:1;translate:0 0}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}@media(max-width:1050px){.hero{grid-template-columns:1fr 1.3fr}.shell{grid-template-columns:minmax(0,1fr) minmax(360px,1fr);gap:12px;padding:12px}.card{padding:16px}.field-control button{min-width:32px}.fields{gap:7px}.entry-grid{grid-template-columns:1fr 1fr}.entry-grid .teacher-entry{grid-column:1/-1}.map-heading h2{font-size:20px}}@media(max-width:760px){.topbar{padding:12px 16px;align-items:start}.brand{font-size:18px}.top-meta{justify-content:flex-end;gap:5px}.top-meta .pill{padding:4px 8px}.hero{grid-template-columns:1fr;gap:8px;padding:8px 0}.hero h1{font-size:40px;margin-bottom:15px}.hero p{max-width:none}.lobby{padding:18px}.entry-grid{grid-template-columns:1fr}.entry-grid .teacher-entry{grid-column:auto}.intro-strip{font-size:12px;flex-wrap:wrap}.shell{grid-template-columns:1fr}.workspace{position:static;grid-row:2}.map-panel .island-svg{max-height:300px}.zone-nav{margin:10px 0}.feed{margin-top:10px}.fields{gap:10px}.field-control button{min-width:40px}.public-board{grid-template-columns:1fr 1fr}.map-heading h2{font-size:18px}.stat-grid{gap:6px}.stat{padding:10px}.teacher-tools .row{align-items:stretch}.teacher-tools .row>*{flex-basis:40%}}@media(pointer:coarse){.field-control button{min-width:48px}.fields{grid-template-columns:repeat(2,minmax(0,1fr))}.fields.scale-fields{grid-template-columns:repeat(2,minmax(0,1fr))}.feed-row button{min-height:48px}}

.build-progress{height:100px;margin:10px 0;border:1px solid var(--line);border-radius:12px;background:#13323d}.build-progress svg{height:100%;width:100%}body{padding-bottom:env(safe-area-inset-bottom)}.topbar{padding-top:max(12px,env(safe-area-inset-top))}
@media(max-width:760px){.topbar{flex-wrap:wrap}.brand{white-space:nowrap}.top-meta{width:100%;justify-content:flex-start}.feed #feed{max-height:230px;overflow:auto}}

.download-link{display:block;padding:14px;margin:12px 0;border:1px solid var(--mint);border-radius:12px;min-height:48px}.export-preview{white-space:pre-wrap;overflow-wrap:anywhere;max-height:240px;overflow:auto;font-size:12px;background:#102e3a;padding:12px}details summary{cursor:pointer;min-height:48px;padding:12px 0}

/* 所有裝置保持可觸控尺寸，不依賴指標偵測才能取得完整操作區。 */
.fields,.fields.scale-fields{grid-template-columns:repeat(auto-fit,minmax(160px,1fr))}.field-control button{min-width:48px;flex:0 0 48px}.field-control input{font-size:16px;scroll-margin-block:100px}.feed-row button{min-height:48px;min-width:48px}

.manipulator{margin:16px 0}.slot-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(135px,1fr));gap:8px;margin:12px 0}.value-slot{display:flex;flex-direction:column;gap:6px;min-height:74px;padding:10px;background:#123b48}.value-slot span{font-size:12px}.value-slot b{font-size:20px;color:#efbd70;overflow-wrap:anywhere}.choice-row,.number-bank{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}.number-card{min-width:54px;touch-action:none;background:#2b5361;user-select:none}.selected{outline:2px solid #efbd70;outline-offset:-2px;background:#365e60!important}.drop-hover{outline:4px solid #82c7b3;background:#315d51}.drag-card{position:fixed;z-index:99;pointer-events:none;transform:translate(-50%,-120%);padding:12px 18px;background:#efbd70;color:#102d3b;border-radius:12px;box-shadow:0 6px 20px #0008;font-size:22px}.geo-tools button{flex:1;min-width:70px}#work-visual:has(+ #input-fields .geo-tools) svg{touch-action:none;cursor:crosshair}.precision{margin:12px 0;border-top:1px solid #31545d}.pair-board>div{margin:12px 0}.number-bank{max-height:220px;overflow:auto;padding:4px}.precision summary{color:#aac3c7}.manipulator .small{line-height:1.7}
.value-slot[data-slot=r],.value-slot[data-slot=red]{border-color:#e8917e}.value-slot[data-slot=b],.value-slot[data-slot=blue]{border-color:#84b9ee}.value-slot[data-slot=y],.value-slot[data-slot=yellow]{border-color:#eabd60}
.choice-row button{min-width:48px}

/* 快速學習版：工作台優先，只有單一任務與至多三個答案。 */
.shell.student{grid-template-columns:minmax(0,1.65fr) minmax(280px,1fr);gap:24px}.student .workspace{grid-column:1;grid-row:1;position:static}.student .map-panel{grid-column:2;grid-row:1}.student .map-panel .island-svg{max-height:260px}.student .workspace h2{font-size:24px;line-height:1.6;margin:12px 0 18px}.quick-visual{position:relative;margin:16px 0}.quick-visual .work-svg{width:100%;max-height:none;height:auto;aspect-ratio:450/315}.point-choice,.point-handle{position:absolute;transform:translate(-50%,-50%);min-width:48px;width:48px;height:48px;min-height:48px;border-radius:50%;padding:0;font-size:20px;border:2px solid #eac48b;box-shadow:0 2px 10px #102d3b80}.point-choice{background:#214754}.point-handle{background:#efbd70;color:#163946;touch-action:none;border-color:#fff5d8;cursor:grab;font-size:17px}.point-choice:active,.point-handle:active{transform:translate(-50%,-50%)}.quick-options{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:18px 0}.quick-options button{min-height:72px;padding:14px;font-size:17px;line-height:1.6}.given-proof{background:#214451;padding:14px;border-radius:12px;line-height:1.8;margin:12px 0;font-size:15px}.quick-help{font-size:14px;color:#aac3c7;line-height:1.7}.student .zone-nav button{font-size:11px}.student .zone-nav:empty{display:none}.activity summary{font-size:15px}.activity #feed{margin-top:12px}.wide{width:100%}
@media(max-width:950px){.shell.student{grid-template-columns:1fr}.student .workspace{grid-column:1;grid-row:1}.student .map-panel{grid-column:1;grid-row:2}.student .map-panel .island-svg{max-height:200px}.student .map-panel{border-top:1px solid #31545d;padding-top:16px}.student .zone-nav{grid-template-columns:repeat(5,1fr)}.student .workspace h2{font-size:22px}}
@media(max-width:500px){.quick-options{grid-template-columns:1fr}.quick-options button{min-height:56px;font-size:16px}.point-choice,.point-handle{width:48px;height:48px}.student .workspace h2{font-size:20px}}