:root{--bg:#f6f7f2;--ink:#253e36;--muted:#7c8980;--green:#496f5c;--light:#e9eee6;--border:#dfe5dc;--blue:#527e9b;--white:#fffefa;font-family:ui-rounded,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);font-synthesis:none}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer;color:inherit;border:0;background:none;min-height:36px}button:disabled{opacity:.35;cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #e5b86b;outline-offset:3px}button:hover:not(:disabled){filter:brightness(.92)}[hidden]{display:none!important}#app{height:100dvh;display:flex;flex-direction:column;max-width:1800px;margin:auto}header{height:90px;flex-shrink:0;display:flex;align-items:center;justify-content:space-between;padding:0 38px;border-bottom:1px solid var(--border)}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:inherit;font-size:23px;font-weight:650;letter-spacing:2px}.brand img{width:48px;height:48px}.brand small{display:block;font-size:9px;letter-spacing:2.5px;font-weight:500;margin-top:5px;color:var(--muted)}nav{display:flex;background:#e9ede6;border-radius:30px;padding:5px;gap:4px}.tab{border-radius:24px;padding:9px 35px;min-width:110px;color:#788478}.tab.active{background:var(--white);color:var(--ink);box-shadow:0 2px 8px #344c3010}.quiet{font-size:13px;color:var(--muted);border-radius:8px;padding:5px 10px}main{display:flex;flex:1;min-height:0}.library{width:276px;flex-shrink:0;padding:30px 25px 18px;border-right:1px solid var(--border);display:flex;flex-direction:column}.eyebrow{font-size:10px;font-weight:600;letter-spacing:2px;color:var(--muted)}h2{font-size:19px;font-weight:600;margin:10px 0 23px}.search{display:flex;align-items:center;border:1px solid var(--border);border-radius:12px;background:#fff;gap:8px;padding:2px 12px}.search span{font-size:25px;color:var(--muted)}input{min-width:0}.search input{width:100%;background:transparent;border:0;height:40px;font-size:13px;outline:none}.filters{display:flex;gap:5px;margin:16px 0}.filters select{min-width:0;flex:1}select{background:#eef1eb;border:0;border-radius:8px;padding:9px 8px;font-size:12px;color:var(--ink)}.library-meta{display:flex;justify-content:space-between;font-size:11px;color:var(--muted);margin:4px 0 14px}.characters{display:grid;grid-template-columns:repeat(4,1fr);gap:9px;align-content:start;flex:1;min-height:0;overflow:auto;padding:2px}.char-tile{height:60px;border-radius:11px;background:#fffefa;border:1px solid #e5e9e0;font-family:"Kaiti SC",STKaiti,serif;font-size:24px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px}.char-tile small{font-size:10px;color:var(--muted);font-family:system-ui}.char-tile.selected{background:#dee8da;border-color:#8eaa8b;color:#365c40}.library-pages{display:flex;align-items:center;justify-content:space-between;font-size:11px;color:var(--muted);padding-top:10px}.library-footer{border-top:1px solid var(--border);margin-top:14px;padding-top:16px;display:flex;gap:12px;align-items:center;font-size:11px;color:var(--muted)}.library-footer small{display:block;margin-top:7px;font-size:10px;color:#9ba398}.tiny-rainbow{font-size:30px;color:#d5ac74}.workspace{padding:30px 38px 16px;flex:1;min-width:0;min-height:0;display:flex;flex-direction:column}.lesson-top,.sheet-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:22px;flex-shrink:0}h1{font-weight:500;font-size:30px;margin:8px 0 0;display:flex;align-items:baseline;gap:15px}#char-title{font-family:"Kaiti SC",STKaiti,serif;font-size:40px}#pinyin-title{font-size:25px;letter-spacing:2px}h1 small{font-size:12px;color:var(--muted);font-weight:400;border-left:1px solid var(--border);padding-left:15px}.lesson-actions{display:flex;align-items:center;gap:18px}.pill{background:#e7eee4;border:1px solid #d5e0d0;padding:10px 18px;border-radius:24px;font-size:13px}.pill[aria-pressed=true]{background:var(--green);color:white}.arrows{display:flex;align-items:center;gap:10px}.arrows button{background:#fffefa;border:1px solid var(--border);border-radius:50%;width:36px;height:36px;font-size:18px}.practice-pair{display:grid;grid-template-columns:1fr 1fr;gap:22px;min-height:0;flex:1;align-items:stretch}.practice-card{background:var(--white);border:1px solid var(--border);border-radius:20px;padding:18px 22px;display:flex;flex-direction:column;min-height:0;overflow:hidden}.card-top{display:flex;align-items:center;justify-content:space-between;flex-shrink:0;height:35px;margin-bottom:12px}.card-top h2{font-size:17px;margin:0;display:flex;align-items:center;gap:9px}.step-dot{display:inline-flex;align-items:center;justify-content:center;background:#e8eee3;border-radius:50%;width:24px;height:24px;font-size:11px;color:#6d8666}.trace-card .step-dot{background:#e7eef1;color:var(--blue)}.tag{font-size:10px;letter-spacing:1px;color:var(--muted)}.square{position:relative;width:100%;min-height:0;flex:1;display:flex;align-items:center;justify-content:center;overflow:hidden}.square svg{height:100%;width:100%;max-height:100%;display:block}.trace-square{touch-action:none}.trace-square>div,.trace-square>canvas{position:absolute;inset:0;width:100%;height:100%}.demo-controls,.trace-tools{display:flex;justify-content:space-between;align-items:center;font-size:11px;color:var(--muted);flex-shrink:0;height:43px;margin-top:8px}.meaning{border-top:1px solid #edf0e9;padding-top:13px;min-height:65px}.meaning span{font-size:8px;letter-spacing:2px;color:#a3aa9b}.meaning p{font-size:13px;line-height:1.5;margin:7px 0 0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.encouragement{font-size:13px;color:#8da1ac;text-align:center;padding-top:15px;margin:0;height:65px;border-top:1px solid #edf0e9}.learn-bottom{display:flex;justify-content:space-between;align-items:center;min-height:45px;gap:12px;font-size:12px;color:var(--muted)}.text-button{font-size:12px;color:var(--green);white-space:nowrap}input[type=checkbox]{accent-color:var(--green);vertical-align:middle}footer{display:flex;justify-content:space-between;align-items:center;padding:4px 38px 8px;font-size:10px;letter-spacing:1px;color:#99a193;flex-shrink:0}footer button{font-size:10px!important}.audio-wrap{position:relative}.popover{position:absolute;right:0;top:48px;z-index:9;border:1px solid var(--border);border-radius:12px;padding:15px;background:white;box-shadow:0 8px 30px #253e3615;min-width:180px;font-size:13px}.popover small{display:block;margin-top:10px;font-size:11px;color:var(--muted)}.sheet-heading h1{font-size:27px}.sheet-actions{display:flex;align-items:center;gap:8px}.primary{background:var(--green);color:white;padding:10px 18px;border-radius:11px;font-size:13px}.sheet-setup{display:flex;gap:20px;padding:16px 20px;background:var(--white);border:1px solid var(--border);border-radius:15px;flex-shrink:0}.sheet-input{display:flex;flex-direction:column;gap:6px;flex:1;font-size:12px}.sheet-input input{border:0;border-bottom:1px solid var(--border);padding:8px 0;font-size:18px;background:transparent;width:100%;color:var(--ink)}.sheet-input small{font-size:10px;color:var(--muted)}.sheet-options{display:flex;flex-direction:column;justify-content:center;gap:9px}.sheet-options>div{display:flex;align-items:center;gap:10px;font-size:12px}.sheet-stage{flex:1;min-height:0;display:flex;align-items:center;justify-content:center;position:relative;padding:12px;background:#ecede6;border-radius:12px;margin-top:14px}#paper-view{position:relative;background:white;box-shadow:0 3px 12px #26362a1a;touch-action:none}#sheet-svg,#sheet-svg svg,#sheet-canvas{position:absolute;inset:0;width:100%;height:100%}#sheet-empty{color:var(--muted);font-size:13px}.sheet-bottom{display:flex;justify-content:space-between;align-items:center;font-size:11px;color:var(--muted);padding-top:10px;flex-shrink:0}#save-status{font-size:10px}dialog{border:1px solid var(--border);border-radius:24px;max-width:600px;width:90vw;padding:32px;color:var(--ink);background:var(--white);line-height:1.8}dialog::backdrop{background:#1e372b55;backdrop-filter:blur(4px)}dialog h2{margin:0 0 15px}dialog p,dialog li{font-size:14px}dialog a{color:var(--green)}.dialog-close{float:right;font-size:25px}#toast{position:fixed;bottom:60px;left:50%;transform:translateX(-50%);max-width:90vw;padding:12px 22px;background:#294236;color:white;border-radius:12px;font-size:13px;z-index:50;box-shadow:0 4px 18px #0002}#loading{margin:auto;font-size:16px;color:var(--muted)}#print-area{display:none}@media(max-height:800px){header{height:72px}.workspace{padding-top:20px}.lesson-top,.sheet-heading{margin-bottom:12px}.practice-card{padding:12px 16px}.library{padding-top:20px}.library-footer{display:none}.meaning,.encouragement{min-height:48px;height:48px;padding-top:8px}.card-top{margin-bottom:5px}.demo-controls,.trace-tools{height:32px;margin-top:2px}footer{padding-bottom:3px}.sheet-setup{padding:10px 15px}}@media(max-width:1100px){header{padding-inline:22px}.workspace{padding-inline:22px}.library{width:216px;padding-inline:16px}.characters{gap:6px}.char-tile{height:53px}.practice-pair{gap:14px}.lesson-actions{gap:10px}.sheet-actions{gap:2px}.sheet-heading{gap:10px}.sheet-heading h1{font-size:22px}.sheet-setup{gap:10px}.sheet-options>div{gap:5px}.sheet-options select{padding-inline:4px}#save-status{display:none}}@media(max-width:760px){#app{height:auto;min-height:100dvh}header{height:70px;padding:0 14px}.brand{font-size:17px;gap:6px}.brand img{width:34px;height:34px}.brand small{font-size:7px;letter-spacing:1px}header>.quiet{display:none}.tab{padding:7px 18px;min-width:70px}main{flex-direction:column}.library{width:100%;padding:12px 16px;border:0;border-bottom:1px solid var(--border)}.library h2,.library>.eyebrow,.library-meta,.library-footer{display:none}.filters{margin:9px 0}.characters{display:flex;overflow:auto;flex:none;height:57px}.char-tile{min-width:47px}.library-pages{padding-top:0;height:28px}.workspace{padding:18px 15px;min-height:500px}.practice-card{padding:10px}.practice-pair{gap:10px;min-height:290px}.square{min-height:130px}.lesson-top h1{gap:9px}#char-title{font-size:30px}#pinyin-title{font-size:20px}.lesson-actions{gap:6px}.lesson-actions .arrows{display:none}.pill{padding:8px 12px;font-size:12px}.card-top h2{font-size:14px}.tag{display:none}.meaning{min-height:80px}.encouragement{height:80px;font-size:12px}.learn-bottom{font-size:11px}.sheet-heading{flex-wrap:wrap}.sheet-setup{flex-direction:column}.sheet-stage{min-height:350px}.sheet-bottom{gap:8px}.sheet-actions button{font-size:11px;padding-inline:10px}footer{padding-inline:16px}.sheet-options{flex-direction:row;flex-wrap:wrap}.trace-tools{font-size:10px}}
@media print{body{background:white}#app,dialog,#toast{display:none!important}#print-area{display:block}.print-page{break-after:page;width:100%;height:100%;position:relative}.print-page:last-child{break-after:auto}.print-page svg{display:block;width:100%;height:100%}*{-webkit-print-color-adjust:exact;print-color-adjust:exact}}

.writing-focus header,.writing-focus .library,.writing-focus footer,.writing-focus .sheet-setup,.writing-focus .sheet-heading .eyebrow{display:none}.writing-focus #app{height:100dvh}.writing-focus #worksheet{padding-top:12px}.writing-focus .sheet-stage{margin-top:0}.writing-focus main{min-height:0}.writing-focus .sheet-stage{min-height:0}

.daily-view .library{display:none}.daily-page-heading{margin-bottom:20px}.daily-page-heading h1{font-size:30px}.daily-page-heading p{font-size:13px;color:var(--muted);margin-bottom:0}.daily-page-grid{display:grid;grid-template-columns:minmax(270px,.85fr) minmax(350px,1.15fr);gap:24px;max-width:1050px;width:100%;margin:0 auto;min-height:0;flex:1}.checkin-card,.checkin-calendar{background:var(--white);border:1px solid var(--border);border-radius:20px;padding:24px}.checkin-card{background:linear-gradient(150deg,#edf3e7,#fff9e9);text-align:center;display:flex;flex-direction:column;align-items:center;justify-content:center}.checkin-sun{font-size:42px;color:#d9b352;line-height:1}.checkin-card p{font-size:13px;line-height:1.8;color:var(--muted);margin:10px 0}.checkin-card h2{font-size:22px;margin:8px 0}.checkin-card .primary{min-width:200px;margin:15px 0}.checkin-card .primary:disabled{opacity:1;background:#dde9d3;color:#5a794b}.checkin-stats{display:flex;justify-content:center;gap:45px;width:100%;border-top:1px solid #dde5d4;padding-top:20px;margin:12px 0 20px}.checkin-stats strong{display:block;font-size:28px;font-weight:500;color:var(--green)}.checkin-stats span,.checkin-card small{font-size:11px;color:var(--muted)}.checkin-calendar{display:flex;flex-direction:column;justify-content:center}.calendar-heading{display:flex;justify-content:space-between;align-items:center;margin:0 0 18px}.calendar-heading button{border-radius:50%;background:#edf1e7;width:36px}.calendar-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:7px;text-align:center}.calendar-grid>span{font-size:11px;color:var(--muted);margin-bottom:6px}.calendar-day{min-height:43px;padding:3px 0;border-radius:9px;font-size:14px;display:flex;flex-direction:column;align-items:center;justify-content:center;background:#f3f4ee}.calendar-day small{font-size:10px;color:#819471;line-height:1.1}.calendar-day.checked{background:#dfedcf;color:#497237}.calendar-day.today{outline:2px solid #c7a255;outline-offset:-2px}.calendar-day.future{opacity:.4}.calendar-note,.checkin-storage{font-size:11px;color:var(--muted);line-height:1.8}.checkin-storage{text-align:center;margin:12px 0 0}.calendar-note{margin:16px 0 0}@media(max-height:800px) and (min-width:761px){.daily-page-heading{margin-bottom:15px}.checkin-card,.checkin-calendar{padding:18px}.checkin-sun{font-size:32px}.checkin-stats{padding-top:12px;margin:8px 0 12px}.checkin-card .primary{margin:8px 0}.checkin-card p{margin:6px 0}.calendar-day{min-height:35px}.calendar-heading{margin-bottom:12px}}@media(max-width:760px){header{flex-wrap:wrap;height:auto;gap:10px;padding-block:12px}nav{width:100%;justify-content:center}.tab{flex:1;padding:7px 10px;min-width:0}.daily-page-grid{grid-template-columns:1fr;gap:16px}.daily-page-heading{margin-bottom:18px}.checkin-card,.checkin-calendar{padding:20px}.checkin-card{min-height:330px}.daily-view .workspace{min-height:0}.checkin-storage{margin-bottom:10px}}
/* Match the native iPad LearningView: demonstration and validated practice, with controls below. */
.native-learn{padding:16px;gap:10px}.native-title{display:flex;align-items:center;justify-content:space-between;gap:12px}.native-title h1{font-size:23px;margin:0;gap:12px}.native-title #char-title{font-size:28px}.native-title #pinyin-title{font-size:23px;letter-spacing:0}.native-title>span{font-size:11px;color:var(--muted)}.native-pair{display:grid;grid-template-columns:1fr 1fr;gap:20px;flex:1;min-height:0}.native-column{display:flex;flex-direction:column;align-items:center;min-height:0;gap:7px}.native-label{width:100%;display:flex;justify-content:space-between;align-items:center;min-height:28px}.native-label h2{font-size:17px;margin:0}.native-label>span{font-size:11px;color:var(--muted)}.native-grid{flex:1;min-height:100px;width:100%;background:white;border-radius:22px;overflow:hidden}.native-grid svg{width:100%;height:100%}.native-meaning{margin:0;min-height:36px;font-size:13px;text-align:center;line-height:1.4;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.native-words{margin:0;min-height:26px;font-size:11px;text-align:center;color:var(--muted)}.native-column .audio-wrap .pill{padding:5px 13px;font-size:12px;border-radius:8px}.native-column .popover{top:36px}.native-buttons{display:flex;gap:8px;width:100%;flex-shrink:0}.native-buttons button{flex:1;min-width:0;min-height:44px;border-radius:13px;background:white;font-size:12px;font-weight:600;padding:5px}.native-buttons small{display:block;font-size:9px;font-weight:400;margin-top:4px}.native-buttons #animation{background:#2e5e54;color:white}.native-speed{display:flex;padding:3px;border-radius:9px;background:#e6eae2;width:100%;flex-shrink:0}.native-speed button{flex:1;font-size:10px;padding:4px;min-height:28px;border-radius:7px}.native-speed .chosen{background:white;box-shadow:0 1px 4px #0001}.practice-feedback{font-size:13px;font-weight:500;line-height:1.5;text-align:center;min-height:38px;margin:4px 0;width:100%}.practice-feedback[data-kind=error]{color:#bd3838}.practice-feedback[data-kind=success]{color:#3b7a4c}.native-bottom{display:flex;gap:20px;align-items:center;flex-shrink:0;font-size:12px;min-height:38px}.native-bottom #add-sheet{margin-left:auto}.native-column:last-child .native-grid{flex:none;height:calc(100% - 241px);min-height:100px}.native-column:last-child{align-items:stretch}.native-column:last-child .native-label{flex-shrink:0}
#course-home{max-width:1000px;width:100%;margin:auto;overflow:auto}#course-lesson{display:flex;flex-direction:column;min-height:0;flex:1;max-width:760px;width:100%;margin:auto}.course-heading,.course-lesson-top,.course-lesson-title{display:flex;align-items:center;justify-content:space-between;gap:14px}.course-heading h1{margin:8px 0;font-size:30px}.course-heading p{font-size:12px;color:var(--muted)}.course-welcome{display:flex;align-items:center;justify-content:center;gap:50px;background:#fffefa;border:1px solid var(--border);border-radius:22px;padding:35px 28px;margin:20px 0}.course-welcome h2{margin:0 0 12px;font-size:23px}.course-welcome p{font-size:13px;color:var(--muted)}.course-orbit{width:160px;height:160px;flex-shrink:0;border:12px solid #e3ecd9;border-top-color:#e6b96a;border-radius:50%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px}.course-orbit strong{font-size:34px;font-weight:500}.course-orbit span{font-size:12px;color:var(--muted)}.course-plan{display:flex;gap:10px;margin:22px 0}.course-plan>div{border-radius:12px;border:1px solid #e0e5d8;background:#f6f7f0;min-width:59px;padding:8px;text-align:center}.course-plan strong{display:block;font-family:STKaiti,serif;font-size:28px;font-weight:400}.course-plan small{font-size:9px;color:#95a08c}.course-plan span{font-size:10px;color:var(--muted)}.course-plan .done{background:#e4efd9;border-color:#aac59d}.course-rule{font-size:11px!important;margin-bottom:0}.course-stats{display:flex;gap:20px}.course-stats>div{flex:1;background:#edf1e8;border-radius:15px;padding:20px;text-align:center}.course-stats strong{display:block;font-size:27px;font-weight:500;margin-bottom:7px}.course-stats span,.course-storage{font-size:11px;color:var(--muted)}.course-storage{line-height:1.7;text-align:center;margin-top:20px}.course-lesson-top{font-size:12px;color:var(--muted);margin-bottom:10px}.course-lesson-title h1{font-size:28px;margin:0}.course-lesson-title p{font-size:12px;color:var(--muted)}#course-watch,#course-writing{flex:1;min-height:0;display:flex;flex-direction:column;align-items:center;gap:10px}.course-canvas{position:relative;flex:1;min-height:100px;max-width:440px;width:100%;display:flex;align-items:center;justify-content:center}.course-canvas svg{height:100%;width:100%;display:block}.course-canvas>canvas,.course-canvas>div{position:absolute;inset:0;width:100%;height:100%}#course-meaning{font-size:13px;min-height:20px;max-height:40px;overflow:auto;text-align:center;margin:0}.course-watch-actions,.course-writing-actions{display:flex;gap:12px;justify-content:center;flex-shrink:0;padding-bottom:8px}.course-progress{height:5px;width:100%;max-width:440px;background:#e4eadd;border-radius:4px;overflow:hidden}.course-progress>div{height:100%;width:0;background:linear-gradient(90deg,#e24a45,#f2c94c,#30965a,#3977db,#8757c8)}.course-history-list{max-height:45vh;overflow:auto}.course-history-list>div{display:flex;justify-content:space-between;gap:12px;border-bottom:1px solid var(--border);padding:12px 0;font-size:12px}.daily-view #daily{padding:24px 38px;min-height:0}@media(max-width:1000px){.course-welcome{gap:24px;padding:25px}.course-orbit{width:130px;height:130px}.course-plan>div{min-width:46px}.native-title>span{display:none}.native-buttons{gap:5px}.native-buttons button{font-size:11px}}@media(max-width:760px){.native-pair{grid-template-columns:1fr;gap:16px;flex:none}.native-grid,.native-column:last-child .native-grid{height:220px;flex:none;min-height:220px;max-width:350px;align-self:center}.native-bottom{flex-wrap:wrap;gap:12px}.native-title{margin-bottom:8px}.native-column{min-height:0}.native-learn{min-height:0}.course-welcome{flex-direction:column;gap:20px;padding:24px 14px}.course-orbit{width:120px;height:120px}.course-welcome h2{font-size:19px}.course-heading h1{font-size:24px}.daily-view #daily{padding:20px 15px}.course-stats{gap:8px}.course-stats>div{padding:12px 6px}.course-stats strong{font-size:22px}.course-plan{gap:7px}.course-plan>div{min-width:44px;padding:7px}.course-canvas{min-height:270px;height:270px;flex:none}.course-lesson-title{align-items:flex-start}.course-lesson-title h1{font-size:24px}.course-lesson-title p{font-size:11px;line-height:1.5}.course-writing-actions{gap:6px}.course-writing-actions button{font-size:11px;padding-inline:10px}.course-lesson-top{font-size:10px}.course-history-list>div{font-size:10px;gap:5px}}