:root{--bg:#eef7ff;--card:#fff;--ink:#123;--accent:#0284c7;--accent2:#0ea5e9}
*{box-sizing:border-box}
body{margin:0;font-family:"PingFang TC","Microsoft JhengHei",system-ui,sans-serif;background:var(--bg);color:var(--ink)}
.hero{background:linear-gradient(135deg,#0284c7,#38bdf8 60%,#bae6fd);color:#fff;padding:24px 16px 0}
.hero-inner{max-width:1080px;margin:0 auto;display:flex;gap:16px;flex-wrap:wrap;justify-content:space-between}
.badge{background:rgba(255,255,255,.25);display:inline-block;padding:4px 12px;border-radius:999px;font-size:14px}
h1{margin:8px 0;font-size:32px}.sub{font-size:16px;opacity:.9}
.desc{max-width:560px;line-height:1.6}
.login-card{background:#fff;color:var(--ink);border-radius:16px;padding:16px;min-width:260px;box-shadow:0 8px 24px rgba(0,0,0,.15)}
.login-card label{display:block;margin:8px 0}
.login-card input{width:100%;padding:8px;border-radius:8px;border:1px solid #cbd5e1}
.login-card button{width:100%;padding:10px;border:0;border-radius:10px;background:var(--accent);color:#fff;font-size:16px;cursor:pointer}
.muted{opacity:.75;font-size:14px}
.tabs{max-width:1080px;margin:16px auto 0;display:flex;gap:8px;flex-wrap:wrap;padding-bottom:12px}
.tabs button{border:0;border-radius:999px;padding:10px 16px;cursor:pointer;background:rgba(255,255,255,.85);font-size:15px}
.tabs button.active{background:#0c4a6e;color:#fff}
main{max-width:1080px;margin:0 auto;padding:16px}
.panel{display:none;background:var(--card);border-radius:16px;padding:20px;margin:16px 0;box-shadow:0 4px 16px rgba(2,132,199,.12)}
.panel.active{display:block}
.stage-map{font-size:22px;background:#f0f9ff;border-radius:12px;padding:12px;text-align:center;margin:12px 0}
.guide-card{text-align:center;border:2px dashed #7dd3fc;border-radius:16px;padding:20px}
.guide-emoji{font-size:64px}
.vocab-tag{display:inline-block;background:#fef9c3;padding:6px 14px;border-radius:999px}
.row{display:flex;gap:12px;align-items:center;justify-content:center;margin:12px 0}
.row button{padding:10px 18px;border-radius:10px;border:0;background:var(--accent2);color:#fff;cursor:pointer;font-size:15px}
.progress{height:10px;background:#e2e8f0;border-radius:999px;overflow:hidden}
.progress div{height:100%;width:20%;background:linear-gradient(90deg,#0284c7,#22d3ee);transition:width .3s}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.flash{perspective:600px;cursor:pointer}
.flash-inner{position:relative;transform-style:preserve-3d;transition:transform .5s;min-height:170px}
.flash.flipped .flash-inner{transform:rotateY(180deg)}
.face{position:absolute;inset:0;backface-visibility:hidden;border-radius:14px;padding:14px;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center}
.front{background:linear-gradient(135deg,#e0f2fe,#fff);border:2px solid #7dd3fc}
.back{background:#0c4a6e;color:#fff;transform:rotateY(180deg)}
.face .big{font-size:44px}.face h3{margin:6px 0}
.lab{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:800px){.lab{grid-template-columns:1fr}}
.lab-box{border:1px solid #bae6fd;border-radius:14px;padding:16px;background:#f8fdff}
.dropzones{display:grid;gap:8px;margin:10px 0}
.drop{border:2px dashed #38bdf8;border-radius:10px;padding:12px;min-height:56px;background:#fff}
.drop.filled{border-style:solid;background:#ecfeff}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{background:#fef9c3;border:1px solid #facc15;border-radius:999px;padding:8px 14px;cursor:grab;font-size:15px}
.chip.selected{outline:3px solid #0284c7}
.chip.done{opacity:.45}
.result{font-weight:700;min-height:24px}
#tempSlider{width:100%;accent-color:#f97316}
.temp-visual{font-size:40px;text-align:center;min-height:60px}
.explain{background:#fff7ed;border-radius:10px;padding:10px}
#quizForm{display:grid;gap:12px}
.q{border:1px solid #e2e8f0;border-radius:12px;padding:12px;background:#f8fafc}
.q h4{margin:0 0 8px}
.q label{display:block;padding:6px;border-radius:8px;cursor:pointer}
.q label:hover{background:#e0f2fe}
#quizSubmit{margin-top:12px;padding:12px 24px;border:0;border-radius:10px;background:#16a34a;color:#fff;font-size:16px;cursor:pointer}
.record-box{background:#0f172a;color:#e2e8f0;border-radius:12px;padding:14px;white-space:pre-wrap;font-size:13px;max-height:420px;overflow:auto}
.mini-btn{border:0;border-radius:999px;padding:6px 14px;cursor:pointer;background:#facc15;font-size:14px}
.review{margin-top:12px;display:grid;gap:6px;text-align:left}
.review-row{border-radius:8px;padding:8px 10px;font-size:14px;background:#f1f5f9}
.review-row.ok{border-left:6px solid #16a34a}
.review-row.no{border-left:6px solid #dc2626;background:#fef2f2}
[class^="grade-"],[class*=" grade-"]{font-weight:800}
.grade-優{color:#b45309}.grade-甲{color:#0284c7}.grade-乙{color:#16a34a}.grade-丙{color:#ea580c}.grade-丁{color:#dc2626}
.score-table{width:100%;border-collapse:collapse;margin-top:10px;font-size:14px;background:#fff;color:#123;border-radius:8px;overflow:hidden}
.score-table th,.score-table td{border:1px solid #cbd5e1;padding:6px 8px;text-align:center}
.score-table th{background:#e0f2fe}
footer{text-align:center;padding:20px;color:#475569;font-size:13px}