:root{--ink:#262521;--muted:#898278;--accent:#af4734;--paper:#f8f6f1;--line:#dedbd3;--panel:#fcfbf8}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:14px -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}button,input,select,textarea{font:inherit;color:inherit}a{color:inherit;text-decoration:none}button,a{touch-action:manipulation;-webkit-tap-highlight-color:transparent}button,.file-picker{display:inline-flex;align-items:center;justify-content:center;gap:12px;cursor:pointer;border:1px solid var(--line);border-radius:2px;padding:11px 17px;background:transparent;min-height:42px;transition:background .15s}button:hover,.file-picker:hover{background:#eee8df;border-color:#b99e8e}button:disabled{opacity:.45;cursor:default}.primary{color:white;background:var(--accent);border-color:var(--accent)}.primary:hover{background:#983e2d;border-color:#983e2d}.small{padding:6px 10px;min-height:31px;font-size:12px}button:focus-visible,a:focus-visible,input:focus,select:focus,textarea:focus,summary:focus-visible{outline:2px solid #b66e59;outline-offset:3px}aside{position:fixed;inset:0 auto 0 0;width:178px;border-right:1px solid var(--line);padding:29px 22px}.brand{display:block;font:26px Georgia,serif;letter-spacing:5px;padding-left:9px}nav{display:grid;gap:5px;margin-top:41px}nav a{padding:12px 9px;border-bottom:1px solid transparent;font-size:13px}nav a.active{color:var(--accent);border-bottom-color:var(--accent)}.shell{margin-left:178px}header{height:64px;border-bottom:1px solid var(--line);padding:0 36px;display:flex;align-items:center;justify-content:space-between;gap:20px;font-size:11px;color:var(--muted);letter-spacing:1px}.local{font-size:11px;letter-spacing:0;white-space:nowrap}main{max-width:1060px;margin:auto;padding:29px 36px 45px;min-height:calc(100vh - 64px)}h1{font:40px/1.15 Georgia,"Songti SC",serif;letter-spacing:-1px;font-weight:400;margin:0 0 26px}h2{font:22px/1.25 Georgia,"Songti SC",serif;font-weight:400;margin:0 0 17px;overflow-wrap:anywhere}h3{font-size:16px;font-weight:500;margin:0 0 12px}p{line-height:1.55;margin:10px 0 18px}.muted,.help{color:var(--muted)}.muted{font-size:13px}.help{font-size:11px;line-height:1.6}.eyebrow{font-size:9px;letter-spacing:1.5px;color:var(--accent);text-transform:uppercase}.topline{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:22px}.topline h1{margin:0}.topline .eyebrow{display:block;margin-bottom:8px}.row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.between{justify-content:space-between}.center{justify-content:center}.controls{margin:0 0 22px}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:26px}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.grid>*,.split>*{min-width:0}.card{border-top:1px solid var(--line);padding:22px 0}.card p{font-size:13px}.study-panel{border-top:1px solid var(--ink);border-bottom:1px solid var(--line);padding:24px 0;display:flex;align-items:center;justify-content:space-between;gap:24px}.study-panel h2{margin-bottom:12px}.study-panel select{font-size:12px;padding:8px 11px}.study-panel>.primary{min-width:155px;font-size:16px;min-height:49px}.metrics{margin:0 0 24px}.metrics .card{border-top:0;border-bottom:1px solid var(--line);padding:18px 0}.metric{font:31px/1.1 Georgia,serif;margin-bottom:8px}.metric-label{font-size:10px;color:var(--muted)}.section-head{display:flex;align-items:center;justify-content:space-between;margin:22px 0 15px}.section-head h2{font-size:21px;margin:0}.mode-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.mode-button{justify-content:space-between;text-align:left;min-height:66px;padding:18px 21px;font-size:15px}.mode-button span{font-size:18px;color:#aa8d79}.mode-button.primary span{color:white}.mode-icon{display:block;color:var(--accent);font:36px "Songti SC",serif;margin-bottom:17px}.text-link{font-size:13px;color:var(--accent)}label{display:block;font-size:12px;margin:16px 0 7px}input,select,textarea{max-width:100%;border:1px solid var(--line);border-radius:2px;padding:11px 12px;background:transparent;min-height:42px}textarea{width:100%;min-height:170px;resize:vertical;line-height:1.7}.search{flex:1;min-width:140px}.check{display:inline-flex;align-items:center;gap:8px;font-size:12px;margin:0;white-space:nowrap}.check input{min-height:auto;accent-color:var(--accent)}.wordlist{border-top:1px solid var(--line)}.word{display:grid;grid-template-columns:83px 145px minmax(0,1fr) 33px;align-items:center;gap:14px;padding:13px 0;border-bottom:1px solid var(--line)}.hanzi{font:27px "Songti SC","STSong",serif}.pinyin{font-size:14px}.pinyin small{display:block;font-size:10px;color:var(--muted);margin-top:4px}.definition{font-size:13px;line-height:1.5}.word button{padding:5px;min-width:31px}.pager{justify-content:flex-end;margin-top:18px}.pager button{min-width:42px;padding:8px}.library-notes{font-size:11px;line-height:1.6;color:var(--muted);margin:20px 0 12px}.library-notes p{font-size:12px;max-width:580px}.library-notes summary{cursor:pointer;width:fit-content}.library-notes button{margin-top:12px}.training{max-width:680px;margin:auto}.progress{height:3px;background:#e4ded5;margin:18px 0}.progress>span{height:100%;display:block;background:var(--accent);transition:width .2s}.train-card{text-align:center;border:1px solid var(--line);background:var(--panel);padding:29px 30px;min-height:320px;margin:18px 0}.train-card>.muted{font-size:12px;margin:0 0 24px}.prompt{font:32px/1.35 Georgia,"Songti SC",serif;margin:24px 0 17px}.prompt.hanzi{font:65px/1.2 "Songti SC",serif}.answer-input{display:block;width:100%;max-width:430px;border-width:0 0 1px;text-align:center;font-size:26px;margin:22px auto;background:transparent}.tone-panel{font-size:11px;color:var(--muted);margin:12px auto 20px;max-width:420px}.tone-panel summary{cursor:pointer;width:fit-content;margin:auto}.tonekeys{display:flex;justify-content:center;gap:5px;flex-wrap:wrap;margin-top:12px}.tonekeys button{padding:5px 9px;background:#f0ece4;border:0;min-height:29px;font-size:16px}.train-card .row{justify-content:center}.train-card #answer-form>.primary{min-width:140px}.feedback{padding:18px 15px;background:#edf0e7;color:#4b6650;margin:22px auto 18px}.feedback.bad{background:#f5e8e0;color:#91543f}.feedback>strong{font-size:13px}.answer-word{display:flex;align-items:center;justify-content:center;gap:15px;margin-top:15px}.answer-word .hanzi{font-size:34px}.feedback p{font-size:13px;margin:10px 0 0}.result-number{font:64px Georgia,serif;margin:22px 0}.result-number small{font-size:26px;color:var(--muted)}.choices{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:11px;margin:25px 0}.choices button{min-height:65px}.big-audio{border-radius:50%;width:82px;height:82px;background:#f0e7dd;color:var(--accent);font-size:30px;margin:12px 0}.pair-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.pair-grid button{min-height:68px}.selected{outline:1px solid var(--accent);background:#f1e6dc}.matched{opacity:.3;pointer-events:none}.split{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:30px;margin-top:20px}table{border-collapse:collapse;width:100%;font-size:12px}td,th{text-align:left;padding:11px 5px;border-bottom:1px solid var(--line);font-weight:400}th{color:var(--muted);font-size:10px}.bars{display:flex;height:145px;gap:11px;align-items:flex-end;padding-top:12px}.bar{flex:1;min-width:15px;text-align:center;font-size:10px;color:var(--muted)}.bar i{display:block;min-height:3px;background:#c0826c;margin:8px 0}.status-line{font-size:12px;color:#648064}.profile-email{overflow-wrap:anywhere}.file-picker{margin:0;font-size:13px}.notice{border-left:2px solid var(--accent);padding:10px 14px;font-size:12px;margin:18px 0}.pill{font-size:10px;display:inline-block;padding:4px 8px;background:#eee9e0;color:#987a64;margin-left:7px}#login-form,#code-form{display:flex;flex-wrap:wrap;gap:9px}#login-form input,#code-form input{width:100%;min-width:0}#code-details{font-size:11px;color:var(--muted);margin-top:17px}#code-details summary{cursor:pointer;margin-bottom:12px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}#toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);max-width:90vw;padding:13px 20px;background:#37332e;color:white;border-radius:2px;font-size:12px;display:none;z-index:100;line-height:1.6}.empty{padding:30px 0;color:var(--muted)}
@media(max-width:1000px){aside{width:155px;padding:27px 18px}.shell{margin-left:155px}main{padding:27px 28px 40px}header{padding:0 28px}.word{grid-template-columns:70px 110px minmax(0,1fr) 32px}.grid{gap:19px}.split{grid-template-columns:minmax(0,1fr);gap:10px}}
@media(max-width:700px){aside{position:sticky;top:0;z-index:10;width:100%;padding:12px 5% 0;background:var(--paper);border-right:0;border-bottom:1px solid var(--line)}.brand{font-size:22px;padding:0;line-height:1.1}nav{display:flex;justify-content:space-between;gap:8px;margin-top:10px}nav a{font-size:11px;padding:9px 0 10px}.shell{margin:0}header{height:35px;padding:0 5%;font-size:9px;border-bottom:0}.local{font-size:10px}main{padding:18px 5% 35px;min-height:calc(100vh - 115px)}h1{font-size:32px;margin-bottom:22px}h2{font-size:21px}.topline{margin-bottom:19px}.topline .muted{font-size:11px}.study-panel{padding:19px 0;gap:15px}.study-panel h2{font-size:20px}.study-panel>.primary{font-size:14px;min-width:113px}.grid,.grid.two{grid-template-columns:minmax(0,1fr);gap:14px}.metrics{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-bottom:18px}.metrics .card{padding:17px 0}.metric{font-size:27px}.metric-label{font-size:9px}.mode-grid{gap:9px}.mode-button{padding:14px 12px;min-height:60px;font-size:12px}.mode-button span{font-size:15px}.section-head{margin-top:19px}.section-head h2{font-size:19px}.controls{gap:9px}.controls select{font-size:12px;padding:10px}.controls .check{font-size:11px}.search{font-size:13px}.word{grid-template-columns:63px minmax(0,1fr) 32px;gap:6px 10px;padding:12px 0}.word .definition{grid-column:1/3;grid-row:2;font-size:12px}.word button{grid-column:3;grid-row:1/3}.word .hanzi{font-size:26px}.pinyin{font-size:13px}.card{padding:19px 0}.train-card{padding:24px 15px;min-height:300px}.prompt{font-size:27px}.prompt.hanzi{font-size:58px}.training>.row .eyebrow{font-size:9px;letter-spacing:1px}.training>.row .small{font-size:11px}.answer-input{font-size:24px;margin:20px auto}.choices{grid-template-columns:minmax(0,1fr)}.choices button{min-height:52px}.feedback{padding:16px 10px}.feedback p{font-size:12px}.pair-grid{gap:9px}.pair-grid button{font-size:12px;padding:12px;min-height:63px}.pair-grid .hanzi{font-size:24px}.result-number{font-size:55px}.split{margin-top:18px}.grid.two>.card{margin:0}#login-form{max-width:400px}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
.brand-row{display:flex;flex-direction:column;align-items:flex-start;gap:16px}.brand-row .local{padding-left:9px;color:var(--muted);font-size:11px}nav{margin-top:29px}main{min-height:100vh;padding-top:33px}.study-panel>.primary{white-space:nowrap}
@media(max-width:700px){.brand-row{flex-direction:row;justify-content:space-between;align-items:center;gap:12px}.brand-row .local{padding:0;font-size:10px}nav{margin-top:10px}main{padding-top:22px;min-height:calc(100vh - 80px)}.word .definition{font-size:13px}}
[hidden]{display:none!important}.attempt{font-size:12px;color:#91543f;margin:16px 0 0}.train-card #feedback:not(:empty){margin-top:18px}