@font-face{font-family:system-fallback;src:local("Segoe UI")}*{box-sizing:border-box} :root{--bg:#f5f3ed;--paper:#fffefa;--ink:#263d36;--muted:#64736b;--green:#234f41;--line:#dce1d8;--sage:#e7eddf;--sand:#f1e5ce;--gold:#c9964e}body{margin:0;background:var(--bg);color:var(--ink);font-family:system-fallback,-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft JhengHei",sans-serif;font-size:16px;line-height:1.75}a{color:var(--green);text-underline-offset:4px}button,select,textarea,input{font:inherit}button,.button{cursor:pointer;border:1px solid var(--line);border-radius:9px;padding:11px 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.actions{margin-top:27px;align-items:flex-start;flex-wrap:wrap}.primary{background:var(--green);color:white;border-color:var(--green)}.primary:hover{background:#376854;color:white}.secondary{background:#f3f5ee}.text-button{border:0;background:none;padding:10px;color:var(--green);font-size:14px;text-decoration:underline}.actions{display:flex;flex-wrap:wrap;align-items:center;gap:12px}.mode-switch{display:flex;border:1px solid var(--line);border-radius:8px;padding:3px;background:#f6f6f0}.mode-switch button{font-size:11px;padding:8px 9px;min-height:35px;border:0;background:none;border-radius:5px;font-weight:500}.selected,.mode-switch .selected{background:#e3ebdd;border-color:#9cae98;color:#244d3d}.hero-bottom{border-top:1px solid var(--line);background:#f8f8f1;padding:15px 28px;font-size:11px;color:#687568;line-height:1.8}.hero-bottom 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p{font-size:13px;color:var(--muted);line-height:1.9;margin-bottom:15px}.arrow-link{display:flex;justify-content:space-between;gap:10px;font-size:12px;text-decoration:none;border-top:1px solid var(--line);padding-top:15px}.knowledge-peek{background:var(--sage);border:1px solid #d6ddcc;border-radius:12px;padding:23px 25px;flex:1}.knowledge-peek h3{font-family:"PMingLiU",Georgia,serif;font-size:22px;margin:12px 0}.knowledge-peek p{font-size:12px;color:#5e6f56;line-height:1.9}.tag{display:inline-block;background:#eef1e8;border:1px solid #d6dece;border-radius:4px;padding:3px 8px;font-size:10px;line-height:1.5;color:#4c634d}.small-stats{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:12px;background:var(--paper);padding:25px 9px;margin:25px 0}.small-stats>div{padding:0 23px;border-right:1px solid var(--line);display:flex;flex-direction:column;gap:3px}.small-stats>div:last-child{border-right:0}.small-stats 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.correct{border-color:#7e9e77;background:#edf4e7;color:#29472c}.feedback{font-size:13px;margin-top:14px;background:#f3f0e6;padding:16px;border-radius:7px;line-height:1.9}.feedback.good{background:#eef4e9}.feedback p{margin:6px 0}.feedback small{color:var(--muted);font-size:10px}label{display:block;font-size:14px;margin:12px 0}textarea{display:block;background:#fffef9;border:1px solid #b8c5b6;border-radius:8px;width:100%;padding:15px;font-size:17px;line-height:1.7;margin:14px 0;resize:vertical;color:var(--ink)}.model{font-family:Georgia,serif;font-size:21px;background:#f2f5ed;padding:15px;border-radius:7px}.knowledge-card>p{font-size:16px;line-height:2}.knowledge-card h2{font-family:Georgia,"PMingLiU",serif;font-size:28px;margin-top:15px}.reflection{background:#f1ead9;border-radius:8px;padding:18px 22px;margin:25px 0;font-size:14px}.reflection p{margin:8px 0 0}.knowledge-card 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h2{font-size:22px;margin:0}.group-title>span{font-size:11px;color:var(--muted)}.library-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.library-card{background:var(--paper);border:1px solid var(--line);border-radius:10px;display:block;padding:25px;text-decoration:none}.library-card:hover{border-color:#8f9e83;background:#fafff4}.library-card h3{font-family:"PMingLiU",serif;font-size:24px;margin:12px 0}.library-card p{font-family:Georgia,serif;font-size:16px;color:var(--muted);line-height:1.7}.library-card>div{display:flex;justify-content:space-between;align-items:center}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:24px}.data-row{display:flex;justify-content:space-between;gap:15px;align-items:center;border-bottom:1px solid var(--line);padding:13px 0;font-size:14px}.data-row:last-of-type{margin-bottom:18px}.table-wrap{overflow:auto}table{border-collapse:collapse;width:100%;font-size:12px;white-space:nowrap}th,td{text-align:left;border-bottom:1px solid var(--line);padding:12px 15px 12px 0}th{color:var(--muted);font-weight:500}.setting-row{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:20px 0}.setting-row label{margin:0}#import-file{max-width:100%;font-size:12px}.writing-task{padding:15px 0 25px}.alert,.notice{margin:20px auto 0;max-width:1200px;background:#f4e5c6;border:1px solid #cbb788;border-radius:8px;padding:13px 18px;font-size:13px}.notice{background:#e8eedf;border-color:#c9d4be}.skip{position:fixed;top:-100px;z-index:20;background:white;padding:10px}.skip:focus{top:8px;left:8px}
@media(min-width:1500px){.workspace{padding:0 65px}.hero-copy h2{max-width:80%;font-size:36px}.hero-copy p{max-width:80%}.hero-art{right:45px;top:110px}}
@media(max-width:1180px){.workspace{padding:0 28px}.sidebar{width:205px;padding-left:17px;padding-right:17px}.workspace{margin-left:205px}.today-grid{grid-template-columns:1fr}.today-side{display:grid;grid-template-columns:1fr 1fr}.hero-copy h2,.hero-copy p{max-width:75%}.hero-art{right:50px;top:85px}.hero-copy{padding-top:9px}.lesson-layout{grid-template-columns:minmax(0,1fr)}.lesson-aside{display:none}.small-stats>div{padding:0 17px}.small-stats strong{font-size:25px}.small-stats span{font-size:10px}}
@media(max-width:760px){.sidebar{position:sticky;top:0;width:auto;height:auto;padding:13px 18px 0;z-index:10;background:#f5f5eeed;backdrop-filter:blur(12px);border-bottom:1px solid #d6ddcf;border-right:0}.brand{font-size:20px;gap:9px}.brand img{width:30px;height:30px}.brand small{font-size:8px;margin-top:3px}.sidebar nav{margin-top:13px;display:flex;flex-direction:row;gap:4px;justify-content:space-between}.nav-label,.side-note,.side-footer{display:none}nav a{font-size:12px;padding:9px 10px;border-radius:7px 7px 0 0;gap:7px}nav a span{font-size:17px}.workspace{margin:0;padding:0 20px}.topbar{font-size:10px;padding:16px 0 13px}.page-head{padding:29px 0 23px}h1{font-size:34px;margin-bottom:13px}.page-head .eyebrow{font-size:9px;letter-spacing:1.8px;margin-bottom:13px}.page-head p{font-size:12px}.today-grid{gap:17px}.card-top{padding:20px 21px}.hero-copy{padding:15px 21px 24px}.hero-copy h2{font-size:27px;max-width:69%;margin-bottom:13px}.hero-copy p{font-size:12px;max-width:68%}.hero-art{right:14px;top:100px;width:96px;transform:scale(.8) rotate(7deg);transform-origin:top right}.hero-copy .actions{gap:14px;margin-top:23px}.hero-copy .primary{width:100%;justify-content:space-between}.mode-switch{width:100%}.mode-switch button{flex:1;font-size:12px}.hero-bottom{padding:14px 21px;font-size:10px}.today-side{display:flex;gap:17px}.diagnosis-prompt{padding:22px}.diagnosis-prompt h2{font-size:20px}.knowledge-peek{padding:22px}.small-stats{grid-template-columns:1fr 1fr;row-gap:23px;padding:22px 0}.small-stats>div{padding:0 20px}.small-stats>div:nth-child(2){border-right:0}.small-stats strong{font-size:26px}.small-stats span{font-size:10px}.footer{margin-top:26px;font-size:9px;display:block}.footer>span{display:block;margin-top:6px}.gentle-note{font-size:12px}.two-col{display:block}.card{padding:22px 20px;margin-bottom:18px}.lesson-section{padding:25px 20px}.reading{font-size:22px;line-height:1.85}.reading p{margin-bottom:18px}.section-label{font-size:10px}.lesson-section h2{font-size:21px}.expressions{grid-template-columns:1fr;gap:17px}.expressions>div{padding-left:15px}.expressions>div>span{float:left;margin:4px 12px 0 0}.expressions strong{font-size:21px}.expressions p{margin-top:4px;margin-left:27px}.question legend{font-size:15px}.options button{padding:13px 12px;font-size:14px;min-height:49px}.feedback{font-size:13px}.knowledge-card>p{font-size:15px}.knowledge-card h2{font-size:25px}.back-row{font-size:10px}.library-grid{grid-template-columns:1fr}.group-title{display:block}.group-title>span{display:block;margin-top:5px}.band-picker{gap:12px;padding:16px}.band-picker a{margin:0}.band-picker select{flex:1}.library-card{padding:22px}.finish-box{padding:25px 20px}.finish-box .primary{width:100%}.setting-row{align-items:flex-start;flex-direction:column;gap:10px}.data-row{font-size:13px}.source{word-break:break-word}h2{font-size:21px}.actions>.button,.actions>button{flex-shrink:1}#import-file{width:100%}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation:none!important;transition:none!important}}
@media(max-width:760px){nav a{white-space:nowrap;font-size:11px;gap:5px;padding:10px 4px;flex:1;justify-content:center}.hero-copy h2{max-width:74%;letter-spacing:0}}
@media(max-width:380px){nav a span{display:none}.hero-copy h2{font-size:25px;max-width:74%}.hero-art{right:8px;transform:scale(.65) rotate(7deg)}}
.completion-status{font-size:14px;margin:0 0 20px;line-height:1.9}.completion-status ul{padding-left:23px;margin:12px 0}.completion-status li{margin:7px 0}.completion-status .text-button{padding:5px 10px;min-height:38px}.completion-status p{margin:8px 0 0}.completion-status:focus{outline:2px solid #839b72;outline-offset:7px;border-radius:3px}
.library-tabs{display:flex;gap:10px;margin-top:25px;border-bottom:1px solid var(--line);padding-bottom:15px}.library-tabs a{padding:10px 17px;border-radius:8px;text-decoration:none;font-size:14px}.knowledge-filters{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr) minmax(0,1fr);gap:17px;background:#e9eddf;padding:20px;border-radius:10px;margin-bottom:25px}.knowledge-filters label{margin:0 0 8px;font-size:12px}.knowledge-filters select,.knowledge-filters input{width:100%;max-width:100%;min-width:0}.knowledge-filters input{border:1px solid #bdc8b8;border-radius:7px;padding:10px 12px;background:var(--paper);color:var(--ink);min-height:45px;font-size:14px}.knowledge-reading{max-width:850px}.knowledge-library-card p{font-family:inherit;font-size:14px;line-height:1.9}.inline-success{padding:14px 17px;border-radius:7px;background:#eaf2df;font-size:14px!important}.inline-warning{padding:14px 17px;background:#f5e8cb;border-radius:7px;font-size:14px!important}.ai-extension p{font-size:13px;color:var(--muted)}.ai-extension textarea{font-family:inherit;font-size:14px;line-height:1.9}.knowledge-card .actions{margin-top:20px}.knowledge-card .actions .button,.knowledge-card .actions button{font-size:13px}
@media(max-width:760px){.knowledge-filters{grid-template-columns:1fr 1fr;padding:17px;gap:14px}.knowledge-filters>div:first-child{grid-column:1/-1}.library-tabs{gap:5px}.library-tabs a{padding:10px 12px;font-size:13px}.knowledge-card .actions{align-items:stretch;flex-direction:column}.knowledge-card .actions .button,.knowledge-card .actions button{width:100%}}
.card input:not([type]),.card input[type="url"],.card input[type="email"],.card input[type="password"],.card input[type="time"]{display:block;width:100%;max-width:100%;padding:11px 13px;border:1px solid #bdc8b8;border-radius:7px;background:var(--paper);color:var(--ink);margin-bottom:16px;min-height:45px}.card input[type="checkbox"]{width:18px;height:18px;vertical-align:middle;margin-right:8px}.library-tabs{flex-wrap:wrap}.daily-extra{display:grid;grid-template-columns:1.5fr 1fr;gap:25px;margin-top:24px}.daily-extra p{font-size:13px}.daily-extra details{margin:0;border-top:0}.optional-speech select{max-width:100%;white-space:normal}.optional-speech .actions{margin-top:18px}.optional-speech audio{max-width:100%;width:100%}.optional-speech summary{font-size:16px}.card code{overflow-wrap:anywhere;white-space:normal}.card h3{margin-top:22px}.reading[lang="zh-Hant"]{font-family:inherit;font-size:18px;line-height:2}.question .text-button{font-size:12px}.expressions .text-button{font-size:11px;padding:7px 0}.card .source{overflow-wrap:anywhere;font-size:12px;line-height:1.9}#content-preview:empty{display:none}
@media(max-width:760px){.daily-extra{grid-template-columns:1fr;gap:8px}.library-tabs a{font-size:12px;padding:9px 10px}.optional-speech .actions button{width:100%}.card select{max-width:100%}.back-row{flex-wrap:wrap}.card input[type="file"]{width:100%}}