:root{font-family:system-ui,-apple-system,"PingFang TC",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none;--accent:var(--accent);--line:var(--line)}*{box-sizing:border-box}body{margin:0}a{color:var(--accent);text-underline-offset:.2em}button,select,textarea{font:inherit}button,select{min-height:44px}button{cursor:pointer;border:1px solid var(--line);border-radius:5px;background:transparent;padding:9px 14px;color:inherit}button:hover{background:var(--wash)}button:disabled{opacity:.45;cursor:default}:focus-visible{outline:3px solid var(--accent);outline-offset:3px}.skip{position:absolute;left:12px;top:-100px;z-index:10;background:var(--surface);padding:15px}.skip:focus{top:8px}.bar{height:72px;padding:0 5vw;display:flex;align-items:center;gap:30px;border-bottom:1px solid var(--line)}.brand{text-decoration:none;font-family:"Songti TC",serif;font-weight:700;font-size:24px;white-space:nowrap}.brand span{font:12px system-ui;letter-spacing:.2em;border-left:1px solid var(--line);padding-left:14px;margin-left:14px}.lesson-picker{font-size:12px;color:var(--muted);margin-left:auto}.lesson-picker select{margin-left:8px;border:0;background:transparent;color:var(--ink);max-width:180px}main{max-width:1400px;margin:auto;padding:35px 5vw 50px}.intro{margin:10px 0 35px}.eyebrow{font-size:11px;letter-spacing:.2em;color:var(--muted)}h1{font-family:"Songti TC","Noto Serif TC",serif;font-size:40px;line-height:1.2;letter-spacing:.06em;margin:12px 0}#author{color:var(--muted);font-size:14px}.workspace{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:6vw;align-items:start}#reading{font-family:"Songti TC","Noto Serif TC",serif;font-size:20px;line-height:2.05;min-width:0}#reading p{margin:0 0 1.3em;white-space:pre-wrap;overflow-wrap:anywhere}#reading p:target{background:var(--wash)}.passage-anchor{border:0;padding:0 4px;margin-left:8px;color:var(--muted);font:11px system-ui;vertical-align:middle;opacity:.75;min-height:28px}.note{font:14px/1.8 system-ui;color:var(--muted);border-left:2px solid var(--line);padding:8px 14px;margin:10px 0;background:var(--wash)}.source{font:13px system-ui}.conversation{position:sticky;top:20px;border-left:1px solid var(--line);padding-left:30px;min-width:0;max-height:calc(100dvh - 40px);display:flex;flex-direction:column}.conversation-head h2{font-size:20px;font-weight:500;margin:0 0 8px}.conversation-head p{font-size:12px;color:var(--muted);line-height:1.5;margin:0}.next{font-size:14px;line-height:1.7;padding:15px 0;border-bottom:1px solid var(--line);margin:12px 0}.next button{display:block;margin-top:8px}#turns{overflow:auto;min-height:100px;max-height:44vh;overscroll-behavior:contain}.turn{margin:16px 0 26px;line-height:1.8;font-size:15px;white-space:pre-wrap;overflow-wrap:anywhere}.turn.student{border-left:2px solid #abc1a1;padding-left:14px}.turn small{display:block;font-size:11px;color:var(--muted);margin-bottom:4px}.turn a{display:inline-block;font-size:12px;margin-left:6px}#status{font-size:12px;color:var(--muted);line-height:1.6}#compose{border-top:1px solid var(--line);padding-top:14px}#compose label{font-size:12px;color:var(--muted)}textarea{display:block;width:100%;min-height:84px;max-height:25vh;margin-top:6px;padding:12px;resize:vertical;background:var(--surface);border:1px solid var(--line);border-radius:6px;color:inherit;font-size:16px;line-height:1.7}.compose-actions{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:8px}.compose-actions span{font-size:11px;color:var(--muted)}.compose-actions button{background:var(--accent);color:var(--surface);border:0;padding:10px 23px}.views{display:none}#quote{white-space:pre-wrap;overflow-wrap:anywhere;font-size:13px;line-height:1.6;padding:10px;background:var(--wash);border-left:2px solid var(--accent);max-height:100px;overflow:auto;margin-bottom:10px}#discuss{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);z-index:5;background:var(--accent);color:var(--surface);box-shadow:0 4px 18px #0002}dialog{border:1px solid var(--line);border-radius:8px;max-width:min(650px,94vw);max-height:85dvh;padding:26px;color:inherit;background:var(--paper)}dialog::backdrop{background:#14271966}dialog header{display:flex;gap:30px;align-items:center;justify-content:space-between}dialog h2{font-size:20px}dialog p,dialog a{font-size:14px;line-height:1.8}details{border-top:1px solid var(--line);padding:16px 0}details:first-of-type{margin-top:20px}summary{cursor:pointer;min-height:30px}.requirement{font-size:13px;line-height:1.7;padding:10px 0}.requirement strong{display:block}#references p{font-size:13px}[hidden]{display:none!important}
@media(max-width:720px){.bar{padding:0 18px;height:64px;gap:12px}.brand{font-size:21px}.brand span{display:none}.lesson-picker{font-size:0}.lesson-picker select{max-width:140px;font-size:13px;margin:0}.bar>button{font-size:12px;padding:7px}main{padding:22px 22px 34px}.intro{margin:0 0 22px}h1{font-size:32px}.eyebrow{font-size:10px}#author{font-size:13px}.views{display:flex;border-bottom:1px solid var(--line);margin-bottom:24px;position:sticky;top:0;background:var(--paper);z-index:2}.views button{border:0;border-radius:0;flex:1;color:var(--muted)}.views button[aria-pressed=true]{border-bottom:2px solid var(--accent);color:var(--accent)}.workspace{display:block}.workspace[data-view=text] .conversation{display:none}.workspace[data-view=conversation] #reading{display:none}#reading{font-size:19px;line-height:2}.conversation{position:static;max-height:none;border:0;padding:0}.conversation-head h2{font-size:18px}#turns{max-height:none;overflow:visible;min-height:80px}#compose{position:sticky;bottom:0;background:var(--paper);padding-bottom:max(12px,env(safe-area-inset-bottom));margin-top:15px}.compose-actions span{max-width:160px}.next{margin-top:10px}dialog{padding:20px}#discuss{bottom:calc(18px + env(safe-area-inset-bottom));white-space:nowrap}}
@media(prefers-reduced-motion:no-preference){button{transition:background .15s}#reading p:target{transition:background .2s}}

#first-reading{font:15px/1.8 system-ui}#first-reading .first-read-text{font:20px/2.1 "Songti TC",serif}#first-reading .first-read-layout{display:block}#first-reading header{display:block}#first-reading h3{font-size:21px}#first-reading form,#first-reading .correction-card{margin:14px 0;padding:12px;border:1px solid var(--line)}#first-reading label{display:block}#first-reading input,#first-reading select{width:100%;min-height:44px;font:inherit}#first-reading mark{background:var(--wash);color:var(--note)}#first-reading .correction-saved{color:var(--accent)}#first-reading button{margin:6px 0}#first-reading small{display:block}#first-reading .first-read-authority{font-size:12px;color:var(--muted)}
#first-reading .correction-card span,#first-reading .first-read-mark-card>span{display:block;font-size:12px;color:var(--muted);margin:5px 0}#first-reading .first-read-mark-card{margin:12px 0}
.source-draft{margin:1rem 0;padding:1rem;border:1px solid var(--line,var(--line));border-radius:.7rem;background:var(--paper,var(--paper))}
.source-draft h3{margin:0 0 .6rem;font-size:1rem}.source-draft p,.source-draft blockquote{white-space:pre-wrap;overflow-wrap:anywhere}.source-draft blockquote{margin:.7rem 0;padding-left:.8rem;border-left:2px solid #b09a72}.source-draft blockquote button{display:block;margin-top:.4rem}.source-draft button{min-height:44px}

#source-draft form{display:grid;gap:1rem}#source-draft fieldset{border:0;padding:0;display:grid;gap:.5rem}#source-draft label{display:block;min-height:44px;padding:.5rem;line-height:1.6}#source-draft input[type=radio]{width:auto;min-height:auto;margin-right:.6rem}#source-draft input[type=number]{display:block;width:7rem;min-height:44px}#source-draft textarea{display:block;width:100%;min-height:5rem}

#references{overflow-wrap:anywhere}

#task-input fieldset{margin:0 0 14px;padding:0;border:0;display:grid;gap:8px}#task-input legend{font-size:12px;color:var(--muted);margin-bottom:8px}#task-input label{display:flex;align-items:baseline;gap:10px;min-height:44px;padding:10px 12px;border:1px solid var(--line);border-radius:6px;font-size:15px;line-height:1.6;overflow-wrap:anywhere}#task-input input[type=radio]{flex:none}#task-input input[type=number]{font:inherit;width:5.5em;min-height:44px;margin-left:auto;background:var(--surface);border:1px solid var(--line);border-radius:4px;padding:6px}#task-context:empty,#task-input:empty,#record-receipt:empty{display:none}#task-context{font-size:13px;line-height:1.7;margin-bottom:12px}#record-receipt button{font-size:12px;padding:7px 0;border:0;color:var(--accent);text-decoration:underline;text-underline-offset:.2em}.next blockquote{margin:10px 0 0;padding-left:12px;border-left:2px solid var(--line);white-space:pre-wrap;overflow-wrap:anywhere}#source-results section{padding:12px 0;border-top:1px solid var(--line)}#source-results h4{margin:0}#source-results p{white-space:pre-wrap;overflow-wrap:anywhere}

#record-receipt{font-size:11px;color:var(--muted);line-height:1.5}#turn-review-list p{white-space:pre-wrap;overflow-wrap:anywhere}

/* Discovery stays secondary to the reading workspace. */
#catalog{width:650px}#catalog label{display:block;font-size:14px;margin:14px 0 6px}#lesson-search{width:100%;min-height:46px;font:inherit;padding:10px 12px;border:1px solid var(--line);border-radius:5px;background:var(--surface);color:inherit}#catalog-count,#draft-status{font-size:12px;color:var(--muted);line-height:1.5}#draft-status:empty{display:none}#catalog-results{display:grid}#catalog-results button{display:flex;gap:18px;justify-content:space-between;align-items:center;text-align:left;border:0;border-radius:0;border-bottom:1px solid var(--line);padding:14px 4px;line-height:1.5}#catalog-results button[aria-current]{color:var(--accent);font-weight:600}#catalog-results small{flex:none;color:var(--muted);font-weight:400}#catalog-results span{overflow-wrap:anywhere}#draft-status{margin:4px 0}.passage-anchor{min-height:44px;min-width:44px}summary{min-height:44px}#login{padding:10px 0;min-height:44px}
@media(max-width:720px){.bar{flex-wrap:wrap;height:auto;min-height:64px;gap:8px;padding:10px 18px}.lesson-picker{margin-left:auto}.lesson-picker select{max-width:120px}#catalog-open{margin-left:0}.bar>button{min-height:44px}#catalog{width:94vw}.conversation-head p{max-width:40em}#reading{scroll-margin-top:68px}}
@media(max-width:720px){.bar .lesson-picker{display:none}.bar .brand{margin-right:auto}.bar{flex-wrap:nowrap}.bar>button{white-space:nowrap}#catalog-results button{gap:12px}}

.reading-versions{display:flex;gap:4px;flex-wrap:wrap;margin:0 0 24px;font:13px system-ui}.reading-versions button{border:0;border-radius:24px;padding:9px 16px}.reading-versions button[aria-pressed=true]{background:var(--wash);color:var(--ink)}#first-reading p{font:20px/2.05 "Songti TC",serif;white-space:pre-wrap;overflow-wrap:anywhere}.next small{display:block;color:var(--muted);font-size:11px}.next p{margin:8px 0 0}.next[hidden]{display:none}#copy-transcript{margin-right:8px}body[data-dialogue-flow=conversation] #task-context:empty{display:none}

#passages mark[data-reading-mark]{background:var(--wash);color:var(--note);cursor:pointer;border-radius:2px}#passages mark[data-reading-mark]:focus-visible{outline:2px solid var(--note);outline-offset:3px}

.annotation-number{font:500 .53em/0 system-ui,sans-serif;vertical-align:super;position:relative;top:-.08em;margin:0 .18em 0 .1em;color:var(--note);letter-spacing:.02em}.inline-note{font-family:system-ui,-apple-system,"PingFang TC",sans-serif;font-size:.76em;line-height:1.8;color:var(--note);letter-spacing:.015em}.inline-note::before{content:"〔";opacity:.65}.inline-note::after{content:"〕";opacity:.65}.annotation-number,.inline-note{user-select:none}

.page-shell{max-width:1720px;margin:auto;display:grid;grid-template-columns:250px minmax(0,1fr);gap:32px;padding:28px 3vw 48px}.page-shell main{width:100%;min-width:0;padding:0;max-width:none}.page-shell #catalog{width:auto;position:sticky;top:20px;align-self:start;border-right:1px solid var(--line);padding-right:20px}.catalog-body{padding-top:8px}#catalog-title{font-size:18px;font-weight:600;cursor:pointer;list-style:none}#catalog-title>span{display:block;font-size:11px;font-weight:400;color:var(--muted);letter-spacing:.12em;margin-top:5px}#catalog-results{max-height:calc(100dvh - 255px);overflow:auto;scrollbar-width:thin;display:block}.catalog-book{border-bottom:1px solid var(--line);padding:6px 0}.catalog-book>summary{display:flex;justify-content:space-between;gap:10px;align-items:center;padding:10px 6px;cursor:pointer;list-style:none;border-left:3px solid #799581}.catalog-book:nth-child(2)>summary{border-color:#b1946a}.catalog-book:nth-child(3)>summary{border-color:#7d91ae}.catalog-book:nth-child(4)>summary{border-color:#a58b9c}.catalog-book:nth-child(5)>summary{border-color:#83989a}.catalog-book>summary small{font-size:11px;color:var(--muted)}.book-lessons{padding:4px 0 12px}#catalog-results .book-lessons button{width:100%;justify-content:flex-start;gap:10px;border:0;padding:9px 8px;font-size:13px;border-radius:4px}#catalog-results .book-lessons button[aria-current]{background:var(--wash)}#catalog-results .lesson-number{font-size:10px;opacity:.65;font-variant-numeric:tabular-nums}.unit-entry{font-weight:600}.account-actions{margin-left:auto;display:flex;gap:8px;align-items:center}.account-actions a{display:inline-flex;align-items:center;min-height:44px;padding:8px;text-decoration:none;font-size:14px}.bar .lesson-picker{display:none}.reading-versions[hidden]{display:none}
@media(max-width:1100px){.page-shell{grid-template-columns:210px minmax(0,1fr);gap:24px}.workspace{gap:24px}.conversation{padding-left:20px}}
@media(max-width:899px){.page-shell{display:block;padding:18px}.page-shell #catalog{position:static;width:100%;border:1px solid var(--line);border-radius:8px;padding:0;margin-bottom:25px;background:var(--wash)}#catalog-title{padding:14px 16px;font-size:16px}#catalog-title>span{display:inline;margin-left:12px;font-size:11px}#catalog-title::after{content:"⌄";float:right;color:var(--muted)}.catalog-body{padding:0 14px 12px}#catalog-results{max-height:38vh}.page-shell .intro{margin-top:0}.account-actions{margin-left:auto}.bar .brand{margin-right:0}.bar{gap:8px}}

.next p{white-space:pre-wrap}.simulation-label{font-size:10px;color:var(--muted);letter-spacing:.05em}

:root{--paper:#faf9f5;--surface:#fff;--wash:#e5ebe1;--reply:#f0f2eb;--ink:#252d29;--muted:#526648;--accent:#355b49;--note:#87502f;--line:#dadfd6}
.bar{height:48px;min-height:48px;padding:4px 20px;gap:12px;flex-wrap:nowrap;border-bottom:1px solid var(--line);background:var(--paper)}
.bar .brand{font-size:17px;letter-spacing:.08em}.bar button,.bar summary{min-height:36px;padding:6px 8px;font-size:12px;border:0}.bar #catalog-toggle{font-size:17px;width:36px;padding:4px}.account-actions{margin-left:auto;gap:4px}.account-actions a{font-size:12px;padding:8px}.appearance{position:relative;margin-left:auto}.appearance summary{list-style:none;cursor:pointer;font-size:20px}.appearance summary::-webkit-details-marker{display:none}.appearance select{position:absolute;right:0;top:36px;z-index:20;width:150px;background:var(--surface);color:var(--ink);border:1px solid var(--line);box-shadow:0 6px 22px #0002;padding:8px}.appearance+.account-actions{margin-left:0}
.page-shell.catalog-hidden{grid-template-columns:minmax(0,1fr)}#catalog[hidden]{display:none}.page-shell.catalog-hidden main{max-width:1400px;width:100%}#catalog-title{padding:10px 12px;font-size:13px}#catalog-title:after{display:none}#catalog-count{font-size:11px;color:var(--muted);margin:8px 0}#lesson-search{background:var(--surface);color:var(--ink);border-color:var(--muted)}
.composer-box{position:relative;background:var(--surface);border:1px solid var(--muted);border-radius:14px;overflow:hidden}.composer-box:focus-within{outline:2px solid var(--accent);outline-offset:2px}#answer{border:0;background:transparent;color:var(--ink);padding:14px 14px 56px;width:100%;min-height:130px;resize:vertical;display:block;outline:none}#send{position:absolute;right:9px;bottom:9px;min-height:34px;border-radius:9px;padding:6px 12px;background:var(--accent);color:var(--surface);border:0}#answer::placeholder{color:var(--muted);opacity:1}
.author-avatar{position:relative;display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;flex:none;border-radius:50%;overflow:hidden;background:var(--wash);color:var(--ink);font:17px serif}.author-avatar img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}.next .author-avatar,.turn.teacher .author-avatar{float:left;margin-right:10px}.next{border:0;background:var(--reply);padding:16px;border-radius:12px}.next p{margin-left:46px}.turn.teacher{background:var(--reply);padding:14px;border-radius:12px}.turn.teacher>span:not(.author-avatar){display:block;margin-left:46px}.turn.student{background:var(--surface);border:1px solid var(--line);padding:12px 16px;border-radius:12px;margin-left:30px}.next small,.turn small{color:var(--muted)}
#original-materials{font:15px/1.85 system-ui;margin-top:38px;border-top:1px solid var(--line);padding-top:16px;color:var(--ink)}#original-materials summary{cursor:pointer;padding:10px 0;color:var(--accent)}#original-materials p{white-space:pre-wrap;overflow-wrap:anywhere}#original-materials section,#original-materials details{margin:12px 0}#original-materials a{display:block;overflow-wrap:anywhere;margin:8px 0}#original-materials h3{font-size:16px}.source-media{margin:18px 0}.source-media img,.source-media video{display:block;max-width:100%;height:auto;border-radius:5px}.source-media audio{width:100%}.source-media figcaption{font-size:12px;color:var(--muted);margin-top:8px}.source-media a{font-size:12px}dialog{background:var(--paper);color:var(--ink)}input,textarea,select{color:var(--ink);background:var(--surface)}mark{color:var(--note);background:var(--wash)}
@media(max-width:899px){.bar{gap:3px;padding:4px 8px}.bar .brand{font-size:15px}.bar #materials-open{font-size:11px;padding:6px}.page-shell{padding-top:10px}#catalog{margin-bottom:12px}#catalog-title{padding:6px 10px}main{padding-top:12px}.intro{margin:8px 0 18px}.eyebrow{display:none}.conversation-head h2{font-size:17px}#compose{background:var(--paper)}.next{margin-top:12px}.next p{margin-left:0}.author-avatar{width:30px;height:30px}}

.book-lessons button small{opacity:1;color:var(--muted)}.catalog-book>summary small{color:var(--muted)}#reading .inline-note{color:var(--note)}

#catalog-panel,.appearance{padding:0;border:0;margin-top:0}#catalog-title{display:none}.catalog-book{margin-top:0}.appearance summary{padding:4px 6px}.page-shell #catalog{margin-bottom:12px}#catalog-results{max-height:calc(100dvh - 170px)}@media(max-width:899px){#compose{position:static;padding:4px 0 12px}.page-shell #catalog{padding:8px;background:var(--paper)}#catalog-results{max-height:55vh}.page-shell{padding:12px 16px}.intro h1{font-size:30px}.conversation-head{margin-top:12px}}
.inline-note::before,.inline-note::after{opacity:1}
#catalog-results .lesson-number{opacity:1;color:var(--muted)}
#catalog-results button[aria-current],#catalog-results button[aria-current] .lesson-number{color:var(--ink)}

.bar{display:grid;grid-template-columns:32px auto 1fr 32px auto auto;align-items:center;gap:8px}.bar .brand{grid-column:2}.appearance{grid-column:4;display:flex;align-items:center;justify-content:center;margin:0;height:36px}.appearance summary{height:36px;line-height:24px;padding:6px;display:flex;align-items:center}.account-actions{grid-column:5;margin:0;height:36px}.account-actions a{min-height:36px}.bar #materials-open{grid-column:6;height:36px;white-space:nowrap}.bar #catalog-toggle{grid-column:1;grid-row:1}.appearance select{top:40px;max-width:calc(100vw - 32px)}
.work-heading{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap}.work-heading h1{margin:8px 0}.work-heading #author{margin:0;font-size:14px;white-space:nowrap}.intro{margin-top:0;margin-bottom:22px}#catalog-panel{margin:0;padding:0;border:0}.catalog-body{padding-top:0}#lesson-search{width:100%;border:1px solid var(--muted);border-radius:9px;padding:10px 12px;font:13px system-ui;min-height:40px}#catalog-count{margin:7px 2px 14px}.page-shell{padding-top:20px}
.annotation-toggle{display:inline-flex;align-items:center;justify-content:center;vertical-align:super;min-height:20px;min-width:18px;padding:0 2px;border:0;border-radius:4px;color:var(--note);font-size:12px;line-height:1;background:transparent}.annotation-toggle .annotation-number{font-size:10px;position:static;line-height:1;vertical-align:baseline;margin:0}.annotation-toggle[aria-expanded=true]{background:var(--wash)}.inline-note[hidden]{display:none}#notes-toggle{display:block;min-height:30px;border:0;padding:4px 0;margin:0 0 18px;font:12px system-ui;color:var(--accent)}#notes-toggle[hidden]{display:none}
.material-tabs{display:flex;gap:6px;flex-wrap:wrap;border-bottom:1px solid var(--line);padding-bottom:10px;margin-bottom:18px}.material-tabs button{border:0;font-size:13px;min-height:36px;padding:8px 11px;border-radius:8px}.material-tabs button[aria-selected=true]{color:var(--ink);background:var(--wash);font-weight:600}.material-panel[hidden]{display:none}#original-materials .material-entry{padding:12px 0;border-bottom:1px solid var(--line)}#original-materials .material-entry h3{margin:0 0 10px;font-size:15px;color:var(--ink)}#original-materials .material-entry p{margin:0 0 12px;line-height:1.9}.resource-row{display:flex;gap:12px;align-items:baseline;padding:9px 0;border-bottom:1px solid var(--line)}.resource-row>small{font:10px system-ui;color:var(--muted);min-width:28px}.resource-row a{margin:0!important}#material-media{columns:2;column-gap:20px}#material-media[hidden]{display:none}#material-media figure{break-inside:avoid;margin:0 0 22px}
@media(max-width:899px){.bar{grid-template-columns:36px auto 1fr 28px auto auto;gap:3px}.bar .brand{margin:0}.appearance{height:36px}.work-heading{gap:8px}.work-heading #author{font-size:12px}.page-shell{padding-top:12px}.material-tabs{gap:3px}.material-tabs button{font-size:12px;padding:8px}#material-media{columns:1}}

.bar .appearance{margin:0;padding:0;align-self:center}#catalog-results .catalog-book{margin-top:0}.work-heading{display:block;margin:8px 0;line-height:1.4}.work-heading #author{display:inline;margin-left:.65em;font-weight:400;white-space:normal;letter-spacing:0}.material-tabs{position:sticky;top:0;background:var(--paper);z-index:3}
.reading-prose{font:16px/1.9 system-ui;overflow-wrap:anywhere;min-width:0}.reading-prose p{white-space:pre-wrap}.reading-prose h4{font-size:1.08em;line-height:1.6;margin:1.5em 0 .65em}.reading-prose blockquote{margin:1em 0;padding:.2em 1em;border-left:3px solid var(--accent);background:var(--wash)}.reading-prose ul,.reading-prose ol{padding-left:1.8em}.reading-prose li{margin:.45em 0}.reading-prose pre{white-space:pre-wrap;overflow-wrap:anywhere;padding:12px;background:var(--wash)}.reading-prose img{max-width:100%;height:auto}.reading-prose figure{margin:1em 0}.reading-prose a,#original-materials .reading-prose a{display:inline;margin:0}.reading-prose sup{font-size:.7em;line-height:0}.table-scroll{max-width:100%;overflow:auto}.reading-prose table{border-collapse:collapse;font-size:.9em}.reading-prose td,.reading-prose th{padding:8px;border:1px solid var(--line);min-width:5em}.reading-prose hr{border:0;border-top:1px solid var(--line);margin:1.5em 0}
.plate-reader{max-width:100%;min-width:0;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:var(--surface)}.plate-stage{position:relative;display:flex;justify-content:center;align-items:center;min-height:260px;height:65dvh;max-height:820px;touch-action:pan-y pinch-zoom}.plate-stage img{display:block;max-width:100%;width:100%;height:100%;object-fit:contain}.plate-message{position:absolute;inset:45% 12px auto;text-align:center;background:var(--surface);color:var(--muted);padding:8px}.plate-toolbar{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:8px;align-items:center;padding:10px;border-top:1px solid var(--line);background:var(--paper)}.plate-toolbar button{min-height:44px;padding:8px 12px;white-space:nowrap}.plate-toolbar select{width:100%;min-width:0;min-height:44px;font:14px system-ui;border:1px solid var(--line);border-radius:7px;padding:6px}.plate-count{grid-column:2;text-align:center;font:12px system-ui;color:var(--muted)}#original-materials .plate-toolbar a,.plate-toolbar a{grid-column:3;margin:0;text-align:center;font:12px system-ui}.plate-toolbar button:disabled{opacity:.45;cursor:default}.plate-stage:focus-visible{outline:2px solid var(--accent);outline-offset:-3px}
@media(max-width:420px){.plate-toolbar{gap:4px;padding:6px}.plate-toolbar button{font-size:12px;padding:6px}.plate-toolbar select{font-size:12px}.plate-stage{min-height:180px;height:58dvh}.reading-prose{font-size:15px}}

#original-materials .reading-prose.rich-source p{white-space:normal}.reading-prose li>p:last-child{margin-bottom:0}.reading-prose img{display:block;margin:12px auto}.reading-prose figcaption{font-size:12px;color:var(--muted)}

.plate-stage{cursor:zoom-in}.plate-expand{grid-column:1;grid-row:2}.plate-fullscreen{position:fixed;inset:0;margin:0;padding:0;width:100vw;max-width:none;height:100dvh;max-height:none;border:0;background:var(--paper)}.plate-fullscreen .plate-reader{display:flex;flex-direction:column;height:100%;border:0;border-radius:0}.plate-fullscreen .plate-stage{flex:1;min-height:0;height:auto;max-height:none;cursor:zoom-out}.plate-fullscreen .plate-stage img{position:absolute;inset:0}.plate-fullscreen .plate-toolbar{flex:none;padding-bottom:max(10px,env(safe-area-inset-bottom))}.reading-prose .inline-note{font-size:.88em;line-height:1.8}.reading-prose .inline-note p{display:inline}.reading-prose .inline-note p+p::before{content:"；"}
.reference-gallery{margin:0 0 24px;min-width:0}.reference-gallery h3{font-size:15px;margin:0 0 14px}.reference-images{display:grid;grid-template-columns:minmax(0,1fr);gap:24px}.reference-images[data-layout=overview]{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.reference-images figure{min-width:0;margin:0}.reference-image-open{display:block;width:100%;padding:0;border:0;border-radius:6px;overflow:hidden;background:var(--wash);cursor:zoom-in}.reference-image-open img{display:block;width:100%;height:auto;min-height:100px;object-fit:contain}.reference-images[data-layout=overview] img{height:180px;min-height:0}.reference-images figcaption{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:baseline;gap:12px;font:12px/1.6 system-ui;color:var(--muted);padding:8px 0}.reference-images figcaption span{overflow-wrap:anywhere;min-width:0}#original-materials .reference-images figcaption a{flex:none;display:inline;margin:0}.reference-gallery-toolbar{position:sticky;bottom:0;display:flex;gap:5px;padding:8px 0 max(8px,env(safe-area-inset-bottom));background:var(--paper);border-top:1px solid var(--line);z-index:2}.reference-gallery-toolbar button{flex:1;min-height:40px;padding:6px;font-size:12px;white-space:nowrap}.reference-gallery-toolbar button[aria-pressed=true]{background:var(--wash);color:var(--ink)}.reference-gallery .image-error{font-size:13px;color:var(--muted)}
@media(max-width:420px){.reference-images[data-layout=overview]{gap:8px}.reference-images[data-layout=overview] img{height:140px}}
#material-media{columns:auto}#material-media>.source-media{margin:24px 0;padding-top:20px;border-top:1px solid var(--line)}

@media(max-width:280px){.bar{height:auto;grid-template-columns:36px minmax(0,1fr) 28px auto}.bar .appearance{grid-column:3}.bar .account-actions{grid-column:4}.bar #materials-open{grid-column:2 / -1;grid-row:2;justify-self:end}}

/* 2026-10-20: conversation area integrated composer, progress line, own-sessions list, responsive catalogue */
.conversation-head{display:none}
#compose{position:static;border-top:0;padding:0;margin-top:12px;background:transparent}
.composer-box{display:flex;align-items:flex-end;gap:8px;padding:6px 8px;border-radius:12px;overflow:visible}
#answer{flex:1 1 auto;width:auto;min-height:44px;max-height:220px;padding:10px 6px;line-height:1.6;resize:none;overflow-y:auto}
#send,#stop{position:static;right:auto;bottom:auto;flex:none;min-height:40px;padding:8px 14px;border-radius:10px}
#stop{background:transparent;border:1px solid var(--line);color:var(--muted)}
#progress{display:flex;gap:10px;flex-wrap:wrap;align-items:baseline;margin:8px 0 0;font-size:12px;color:var(--muted);line-height:1.6}
#progress b{font-weight:500;color:var(--ink)}#progress small{font-size:11px}
#sessions-list{padding-left:1.2em;margin:8px 0 0}#sessions-list li{display:flex;gap:10px;align-items:baseline;flex-wrap:wrap;margin:8px 0}#sessions-list small{color:var(--muted)}#sessions-list button{min-height:32px;padding:4px 10px}
@media(max-width:899px){#compose{position:static;padding:0}.composer-box{padding:4px 6px}}

.reply-retry{margin:.4rem 0 .8rem;display:flex;flex-direction:column;gap:.4rem;align-items:flex-start}
.reply-retry small{color:var(--muted,#555)}
.reply-retry button{position:static;padding:.4rem .8rem}
/* B1: compact status dock above the composer; errors stay visible */
.status-dock{display:flex;flex-direction:column;gap:2px;margin:10px 0 0;font-size:12px;line-height:1.5;color:var(--muted)}.status-dock p,.status-dock div{margin:0}.status-dock #status:empty,.status-dock #draft-status:empty,.status-dock #record-receipt:empty{display:none}.status-dock #status.status-error{color:var(--error,#b42318);font-weight:500}
/* B2/B4/B5 */
.latest-jump{position:fixed;right:18px;bottom:96px;z-index:30;min-height:40px;padding:8px 14px;border-radius:20px;border:1px solid var(--line);background:var(--surface);color:var(--ink);box-shadow:0 2px 10px rgba(0,0,0,.12)}.latest-jump[hidden]{display:none}
.persona-label{display:block;margin:2px 0 0;font-size:11px;color:var(--muted);line-height:1.4}.persona-label[hidden]{display:none}
.objective-group{display:inline-block;padding:1px 8px;border:1px solid var(--line);border-radius:12px;font-size:11px}.objective-group[data-done="true"]{color:var(--ink);border-color:var(--ink)}
.author-intro{display:block;margin-top:8px;font-size:12px;color:var(--muted);line-height:1.55}
/* 2026-10-21 correction: a real conversation panel. The thread scrolls on its own inside a fixed-height column, so streaming,
   status changes and new messages never resize the panel or move the reading column; the composer stays put. */
.conversation{position:sticky;top:12px;height:calc(100dvh - 24px - var(--panel-offset,0px));max-height:none;display:flex;flex-direction:column;min-width:0;border-left:1px solid var(--line);padding-left:30px}
.thread{position:relative;flex:1 1 auto;min-height:0;overflow:auto;overscroll-behavior:contain;padding:4px 6px 12px 0;scrollbar-width:thin}
#turns{overflow:visible;max-height:none;min-height:0}
.turn{margin:12px 0 18px}.turn.teacher>span:not(.author-avatar){white-space:pre-wrap}
.latest-jump{position:absolute;left:50%;bottom:168px;transform:translateX(-50%);z-index:4;min-height:36px;padding:6px 14px;border-radius:18px;border:1px solid var(--line);background:var(--surface);color:var(--ink);box-shadow:0 2px 10px rgba(0,0,0,.12);font-size:13px}.latest-jump[hidden]{display:none}
.lesson-details{flex:none;border:0;border-bottom:1px solid var(--line);padding:4px 0 8px;margin:0 0 4px;font-size:12px;color:var(--muted)}.lesson-details[hidden]{display:none}.lesson-details summary{min-height:32px;display:flex;align-items:center;cursor:pointer;color:var(--muted)}.lesson-details ol{margin:6px 0 0;padding-left:1.3em}.lesson-details li{margin:3px 0;line-height:1.5}.lesson-details li[data-status=confirmed]{color:var(--ink)}.lesson-details li small{display:block;color:var(--muted)}.lesson-details-note{margin:8px 0 0;font-size:11px;line-height:1.5}
.status-dock{flex:none;margin:6px 0 0}#compose{flex:none}
#stop{min-height:34px;padding:6px 10px;font-size:12px;border-radius:9px;background:transparent;border:1px solid var(--line);color:var(--muted)}
#progress{margin:4px 0 0}
body[data-dialogue-flow=conversation] #task-context,body[data-dialogue-flow=conversation] #task-input{display:none}
@media(max-width:720px){.conversation{position:static;height:calc(100dvh - 8px - var(--panel-offset,0px));max-height:none;border:0;padding:0}.workspace[data-view=conversation]{display:flex;flex-direction:column}.workspace[data-view=conversation] .conversation{display:flex}#compose{position:static;padding:0 0 max(6px,env(safe-area-inset-bottom))}.latest-jump{bottom:150px}}
.lesson-details ul{margin:6px 0 4px;padding-left:1.3em}.lesson-details li[data-track][data-status=done]{color:var(--ink)}
.paragraph-progress{flex:none;margin:6px 0 2px;font-size:12px;line-height:1.6;color:var(--muted)}.paragraph-progress b{color:var(--ink);font-weight:600}.paragraph-progress .words{display:flex;flex-wrap:wrap;gap:6px;margin-top:4px}.paragraph-progress .word{border:1px solid var(--line);border-radius:999px;padding:1px 10px;font-family:"Songti TC","Noto Serif TC",serif;font-size:14px;color:var(--ink)}.paragraph-progress .word[data-status=confirmed]{border-color:var(--accent);color:var(--accent)}.paragraph-progress .word[data-next]{border-color:var(--ink);font-weight:600}.achievement{flex:none;margin:6px 0 0;padding:10px 14px;border-left:3px solid var(--accent);border-radius:8px;background:var(--wash);color:var(--ink);font-size:13px;line-height:1.6}.achievement strong{font-family:"Songti TC","Noto Serif TC",serif;font-size:16px;margin-right:6px}.achievement small{display:block;color:var(--ink)}