:root{font-family:-apple-system,BlinkMacSystemFont,"PingFang TC","Noto Sans TC",sans-serif;color:#233e42;background:#f6f5ef;font-size:18px;line-height:1.65;--green:#28685b;--muted:#617573;--line:#dce3db}*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button,a.button{cursor:pointer;border:0;border-radius:14px;background:var(--green);color:white;padding:13px 22px;font-weight:650;min-height:50px;text-decoration:none;display:inline-block}button:hover{filter:brightness(.95)}button:disabled{opacity:.5;cursor:wait}button.secondary,a.secondary{background:#e8eee5;color:#28574b}button.quiet{background:transparent;color:var(--green);border:1px solid var(--line)}input,select,textarea{width:100%;padding:12px;border:1px solid #b9c9c1;border-radius:10px;background:white;color:#233e42}textarea{min-height:120px;resize:vertical}label{display:block;font-size:15px;font-weight:650;margin:14px 0 6px}h1{font-size:clamp(30px,5vw,44px);line-height:1.25;font-weight:750;letter-spacing:-1px;margin:12px 0 18px}h2{font-size:25px;line-height:1.4;margin:0 0 14px}h3{font-size:19px;margin:0 0 10px}p{margin:10px 0}header{max-width:1120px;margin:auto;padding:24px 28px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}header a{color:var(--green);font-size:15px}main{max-width:1120px;margin:0 auto;padding:35px 28px 70px}.brand{display:flex;gap:10px;align-items:center;font-weight:750;letter-spacing:.2px}.mark{background:var(--green);color:white;border-radius:12px;width:40px;height:40px;display:grid;place-items:center}.eyebrow{color:var(--green);font-size:13px;letter-spacing:1.5px;font-weight:750}.muted{color:var(--muted)}.small{font-size:14px}.hero{display:grid;grid-template-columns:1.5fr 1fr;gap:24px;align-items:center;margin-bottom:30px}.hero-art{height:220px;background:#e5ecdf;border-radius:28px;position:relative;display:grid;place-items:center;overflow:hidden}.hero-art:before{content:'';position:absolute;width:180px;height:180px;border:25px solid #c1d4b8;border-radius:50%;right:-20px;top:-30px}.book{font-size:85px;transform:rotate(-9deg);z-index:1}.card{padding:25px;background:#fff;border:1px solid var(--line);border-radius:22px;margin-bottom:18px}.tint{background:#edf2e8}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.between{justify-content:space-between}.pill{display:inline-block;padding:4px 11px;border-radius:30px;background:#edf2e8;color:#42634f;font-size:13px;font-weight:650}.pill.warn{background:#fff1d8;color:#815b15}.lesson-icon{width:48px;height:48px;border-radius:15px;background:#eff0e5;display:grid;place-items:center;font-size:26px;margin-bottom:18px}.progress{height:9px;border-radius:9px;background:#e3e8de;overflow:hidden;margin:20px 0}.progress span{display:block;background:#66966a;height:100%;transition:width .2s}.task{max-width:760px;margin:auto}.task .card{padding:32px}.prompt{font-size:32px;font-weight:700;line-height:1.6;margin:28px 0;white-space:pre-wrap}.recap{white-space:pre-wrap;font-size:22px;line-height:1.9}.feedback{padding:20px;border-radius:15px;background:#edf2e8;margin:20px 0;white-space:pre-wrap}.feedback.error{background:#fff0e4}.notice{padding:12px 16px;border-radius:12px;background:#fff3db;color:#795b23;font-size:14px;margin:14px 0}.stat strong{display:block;font-size:34px}.stat{padding:20px;border-radius:17px;background:#edf2e8}.hidden{display:none!important}#toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:#233e42;color:white;border-radius:12px;padding:12px 22px;z-index:5;max-width:90%;box-shadow:0 6px 20px #0002}a{color:var(--green)}.source{white-space:pre-wrap;max-height:260px;overflow:auto;padding:16px;background:#f5f6f0;border-radius:12px;font-size:15px}.question-edit{border-top:1px solid var(--line);padding-top:16px;margin-top:20px}.review img{max-width:100%;max-height:350px;object-fit:contain}input[type=checkbox]{width:22px;height:22px}footer{font-size:13px;color:var(--muted);padding-top:22px}.check-label{display:flex;gap:10px;align-items:center}.status-list{padding:0;list-style:none}.status-list li{padding:12px 0;border-bottom:1px solid var(--line)}:focus-visible{outline:3px solid #db971c;outline-offset:4px}@media(max-width:760px){main{padding:24px 18px 50px}header{padding:18px}.hero{grid-template-columns:1fr}.hero-art{display:none}.grid,.grid.two{grid-template-columns:1fr}.task .card{padding:22px}.row>button{flex-grow:1}.prompt{font-size:28px}h1{letter-spacing:0}.grid.stats{grid-template-columns:repeat(2,minmax(0,1fr))}}

.pair-code{font-size:clamp(20px,4vw,30px);font-weight:750;letter-spacing:2px;overflow-wrap:anywhere}#pairing-result input{font-size:14px}#error{color:#943f2d}