:root{--paper:#f3f6fb;--white:#fff;--ink:#182842;--muted:#62718a;--line:#dce3ee;--blue:#253f6b;--soft-blue:#e8eef8;--green:#176957;--soft-green:#e8f3ee;--orange:#995220;--radius:18px;--body:system-ui,-apple-system,BlinkMacSystemFont,"PingFang TC","Microsoft JhengHei",sans-serif;--display:"Avenir Next","PingFang TC",var(--body);--mono:"SFMono-Regular",Consolas,monospace;font-family:var(--body);color:var(--ink);background:var(--paper);font-synthesis:none}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,a,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:var(--blue)}button:focus-visible,a:focus-visible,select:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid 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12px;border-radius:7px;font-size:11px;min-height:34px}.small-button:hover{background:var(--soft-blue)}.icon-button{background:transparent;font-size:21px;width:36px;height:36px;display:grid;place-items:center;border-radius:8px;color:var(--muted)}.icon-button:hover{background:var(--soft-blue)}.elapsed-track{height:2px;background:#e0e7f1;margin-bottom:31px}.elapsed-track>div{height:100%;width:0;background:var(--green);transition:width 1s linear}#elapsed.over{background:var(--orange)}.chapter-meta{display:flex;gap:10px;align-items:center;font-size:11px;color:var(--muted);margin-bottom:13px}.time-pill{font:600 12px var(--mono);color:var(--blue);padding:6px 9px;border:1px solid #cfd9e9;border-radius:5px}.chapter-title{font:650 clamp(25px,2.9vw,39px)/1.3 var(--display);letter-spacing:-1.1px;margin:0 0 11px}.chapter-subtitle{font-size:14px;line-height:1.7;color:var(--muted);margin:0 0 27px}.main-card{border:1px solid var(--line);border-radius:var(--radius);background:var(--white);overflow:hidden}.action-area{padding:25px 30px 22px}.section-kicker{font-size:11px;font-weight:600;letter-spacing:1px;color:var(--muted);margin:0 0 19px;display:flex;align-items:center;gap:10px}.section-kicker::before{content:"";width:15px;height:2px;background:#93a8c7}.actions{list-style:none;padding:0;margin:0;display:grid;gap:19px}.actions li{display:flex;gap:15px;align-items:flex-start;font-size:16px;line-height:1.85}.step-number{font:12px/29px var(--mono);color:#8a9bb2;flex-shrink:0}.say-area{background:var(--soft-blue);border-top:1px solid #dbe4f0;padding:21px 30px 23px;display:grid;grid-template-columns:24px minmax(0,1fr);gap:12px}.quote-icon{font:48px/1 Georgia,serif;color:#8da3c5}.say-label{font-size:10px;font-weight:650;letter-spacing:1px;color:#506b94;margin:0 0 8px}.say-area blockquote{font-size:18px;line-height:1.8;font-weight:500;margin:0;color:var(--blue)}.output-line{padding:15px 30px;font-size:12px;line-height:1.7;display:flex;gap:13px;background:#fcfdff;border-top:1px solid var(--line)}.output-line b{font-size:10px;color:var(--muted);white-space:nowrap;font-weight:500;line-height:2}.link-actions{display:flex;gap:8px;flex-wrap:wrap;margin:20px 0 0}.external-link{display:inline-flex;align-items:center;justify-content:center;gap:18px;padding:11px 16px;border-radius:8px;background:var(--blue);color:white;font-size:12px;text-decoration:none}.external-link:hover{background:#365780}.parallel-note{display:flex;gap:13px;align-items:flex-start;margin:18px 0;font-size:12px;line-height:1.8;color:#527263}.parallel-note .parallel-symbol{font:19px var(--mono);color:var(--green)}.support{display:grid;grid-template-columns:minmax(0,1fr);gap:12px;margin-top:20px}.support details{border:1px solid var(--line);border-radius:11px;background:#f9fbfe;overflow:hidden}summary{cursor:pointer;list-style:none;display:flex;align-items:center;justify-content:space-between;padding:15px 19px;font-size:12px;font-weight:550}summary::-webkit-details-marker{display:none}summary::after{content:"＋";font-weight:400;color:var(--muted)}details[open]>summary::after{content:"−"}details[open]>summary{border-bottom:1px solid var(--line)}.detail-body{padding:17px 20px}.detail-body ul{padding-left:18px;margin:0;color:var(--muted);font-size:13px;line-height:1.85}.detail-body li+li{margin-top:9px}.prompt{padding:0 0 19px;margin-bottom:19px;border-bottom:1px solid var(--line)}.prompt:last-child{padding:0;margin:0;border:0}.prompt-head{display:flex;gap:10px;align-items:center;justify-content:space-between;margin-bottom:8px}.prompt-head h3{font-size:12px;margin:0}.copy-button{border:1px solid #cbd7e6;color:var(--blue);background:white;padding:6px 12px;border-radius:6px;font-size:11px;white-space:nowrap}.prompt p{font-size:13px;line-height:1.85;color:var(--muted);margin:0;white-space:pre-wrap}.chapter-pagination{display:flex;justify-content:space-between;gap:12px;align-items:center;padding:24px 0 16px}.previous{background:transparent;padding:10px 0;font-size:12px;color:var(--muted)}.next{background:var(--ink);color:white;border-radius:9px;padding:12px 18px;font-size:12px}.next span{margin-left:18px}.page-footer{display:flex;align-items:flex-start;justify-content:space-between;gap:15px;border-top:1px solid var(--line);padding-top:18px;font-size:10px;color:var(--muted);line-height:1.8}.page-footer>span{padding-top:2px}.page-footer details{max-width:400px}.page-footer summary{font-size:10px;padding:0;gap:20px}.page-footer details[open]>summary{border:0}.page-footer p{margin:10px 0}.page-footer a{display:inline-block;margin:0 12px 5px 0;font-size:10px;text-decoration:none}.compare-wrap{margin:23px 0;overflow:auto;border:1px solid var(--line);border-radius:12px;background:#fff}.compare{border-collapse:collapse;min-width:460px;width:100%;font-size:12px;line-height:1.8}.compare th,.compare td{padding:13px 17px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}.compare th{font-size:11px;background:#eaf0f8;color:var(--blue)}.compare tr:last-child td{border-bottom:0}.compare td:first-child{white-space:nowrap;font-weight:600}.remote-flow{display:flex;align-items:center;gap:9px;margin:20px 0;font-size:12px}.remote-flow>span{background:white;border:1px solid var(--line);padding:15px 12px;border-radius:10px;flex:1;text-align:center;line-height:1.6}.remote-flow>i{color:#819ab7;font-style:normal}.overview-intro{margin-bottom:25px}.overview-intro h2{font:650 30px var(--display);letter-spacing:-1px;margin:0 0 8px}.overview-intro p{font-size:13px;color:var(--muted);line-height:1.8}.overview-row{display:grid;grid-template-columns:76px minmax(0,1fr) 24px;gap:18px;padding:21px;border:1px solid var(--line);background:white;border-radius:13px;margin-bottom:10px;color:var(--ink);text-decoration:none;align-items:center}.overview-row:hover{border-color:#8ca6cb}.overview-row time{font:12px var(--mono);color:var(--muted)}.overview-row h3{font-size:16px;margin:0 0 6px}.overview-row p{font-size:12px;color:var(--muted);line-height:1.7;margin:0}.overview-parallel{border-left:2px solid #83bca6;padding-left:13px;margin:9px 0 0;font-size:11px;color:var(--green);line-height:1.7}.focus-mode .chapter-title{font-size:44px}.focus-mode .actions li{font-size:22px}.focus-mode .say-area blockquote{font-size:25px}.focus-mode .app-shell{grid-template-columns:240px minmax(0,1fr);max-width:1650px}.focus-mode .course-heading h1{font-size:30px}dialog{border:1px solid var(--line);border-radius:22px;padding:30px;max-width:610px;width:calc(100% - 32px);max-height:90dvh;color:var(--ink);background:var(--white);box-shadow:0 22px 80px #18284222}dialog::backdrop{background:rgba(24,40,66,.35);backdrop-filter:blur(4px)}.dialog-top{display:flex;justify-content:space-between;gap:15px}.dialog-top h2{font-size:23px;line-height:1.5;margin:0}.muted{font-size:12px;color:var(--muted);line-height:1.7}.prep-item{display:flex;align-items:flex-start;gap:12px;font-size:14px;line-height:1.7;border-bottom:1px solid #e9edf3;padding:14px 0;cursor:pointer}.prep-item input{margin-top:5px;accent-color:var(--green);width:16px;height:16px;flex-shrink:0}.prep-item:has(input:checked){color:#718078}.dialog-bottom{display:flex;justify-content:space-between;align-items:center;margin-top:16px;font-size:12px;color:var(--green)}#toast{position:fixed;bottom:25px;left:50%;transform:translate(-50%,20px);background:var(--ink);color:white;border-radius:10px;padding:12px 22px;font-size:13px;opacity:0;pointer-events:none;transition:.2s;z-index:30;max-width:90vw;text-align:center}#toast.visible{opacity:1;transform:translate(-50%,0)}.no-script{padding:25px;text-align:center}main:focus{outline:none}[hidden]{display:none!important}
@media(min-width:1500px){.app-shell{gap:65px}.sidebar{max-height:none}.actions li{font-size:18px}.say-area blockquote{font-size:20px}}
@media(max-width:1100px){.app-shell{grid-template-columns:235px minmax(0,1fr);gap:28px;padding:0 25px}.topbar{padding:0 25px}.chapter-link{font-size:12px;padding:11px 10px}.nav-time{font-size:10px}.session-context #position{display:none}.course-heading h1{font-size:32px}.action-area{padding:23px}.say-area{padding:20px 23px}.output-line{padding:14px 23px}}
@media(max-width:760px){.topbar{height:65px;padding:0 18px;gap:8px}.brand{font-size:10px;letter-spacing:.7px;gap:7px}.brand img{width:27px;height:27px}.top-actions{gap:1px}.plain{padding:9px 8px;font-size:11px}#focus{display:none}.app-shell,.focus-mode .app-shell{display:block;padding:0 18px}.sidebar{position:relative;top:auto;height:auto;max-height:none;overflow:visible;padding:25px 0 0}.course-heading h1,.focus-mode .course-heading h1{font-size:30px;letter-spacing:-.6px}.course-heading h1 br{display:none}.course-heading .eyebrow{font-size:9px;margin-bottom:9px}.course-heading>p:last-child{display:none}.nav-caption{display:none}#chapters{display:flex;overflow-x:auto;gap:6px;padding:17px 0 10px;scrollbar-width:thin}.chapter-link{width:auto;flex-shrink:0;padding:10px 12px;min-height:40px;border:1px solid var(--line);background:white;border-radius:8px;gap:8px}.chapter-link .nav-num{display:none}.chapter-link .nav-label{font-size:12px}.nav-time{font-size:10px}.background-task{margin:8px 0 0;padding:12px 14px;display:grid;grid-template-columns:minmax(0,1fr) 145px;column-gap:10px;align-items:center}.task-heading{grid-column:1;grid-row:1}.task-name{font-size:12px;margin:5px 0 0;grid-column:1;grid-row:2}.manual{display:none}#task-status{grid-column:2;grid-row:1/3;font-size:11px}.task-disclaimer{grid-column:1/3;font-size:9px;margin-top:8px}main{padding-top:20px}.session-bar{gap:8px}.session-context{font-size:10px;gap:5px}.session-context .separator,.session-context #position{display:none}.clock{font-size:20px}.clock-limit{font-size:9px;margin-right:0}.clock-controls{gap:5px}.small-button{padding:7px 8px;font-size:10px}.icon-button{width:29px;height:30px}.elapsed-track{margin-bottom:24px}.chapter-title,.focus-mode .chapter-title{font-size:27px;letter-spacing:-.6px}.chapter-subtitle{font-size:13px;margin-bottom:21px}.action-area{padding:21px 19px}.actions{gap:16px}.actions li,.focus-mode .actions li{font-size:15px;gap:11px;line-height:1.9}.say-area{padding:20px 18px;gap:6px;grid-template-columns:20px 1fr}.say-area blockquote,.focus-mode .say-area blockquote{font-size:17px;line-height:1.9}.quote-icon{font-size:38px}.output-line{padding:13px 19px;display:block}.output-line b{display:block;margin-bottom:3px}.parallel-note{font-size:11px}.page-footer{font-size:9px;flex-wrap:wrap}.page-footer details{max-width:100%;width:100%}.remote-flow{font-size:11px;gap:6px}.remote-flow>span{padding:12px 6px}.overview-row{grid-template-columns:57px minmax(0,1fr) 12px;gap:10px;padding:17px 14px}.overview-row h3{font-size:14px}.overview-row p{font-size:11px}.overview-row time{font-size:10px}.next{padding:11px 14px;font-size:11px}.next span{margin-left:10px}dialog{padding:23px}.dialog-top h2{font-size:21px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
@media print{.topbar,.sidebar,.session-bar,.elapsed-track,.chapter-pagination,.support,.page-footer,dialog,#toast{display:none!important}.app-shell{display:block;padding:0}main{padding:0}.overview-row{break-inside:avoid}.main-card{border-color:#ccc}.say-area{background:#f1f1f1}.link-actions{display:none}body{background:white}}

/* Lecture workspace: collapsible course flow and side-by-side speaking view. */
.say-area blockquote{white-space:pre-line}
.topbar-start{display:flex;align-items:center;gap:20px;min-width:0}
.sidebar-toggle{min-height:44px;display:flex;align-items:center;justify-content:center;gap:8px;padding:0 12px;margin:0 0 22px auto;border:1px solid var(--line);border-radius:9px;background:var(--white);color:var(--muted);font-size:12px;white-space:nowrap}
.sidebar-toggle:hover{background:var(--soft-blue);color:var(--blue)}
.sidebar-toggle .toggle-arrow{transform-origin:center}
.sidebar-collapsed .sidebar-toggle .toggle-arrow{transform:rotate(180deg)}
.sidebar-collapsed .app-shell,.sidebar-collapsed.focus-mode .app-shell{grid-template-columns:52px minmax(0,1fr);gap:24px}
.sidebar-collapsed .sidebar{visibility:visible;overflow:visible}
.sidebar-collapsed .sidebar-content{display:none}
.sidebar-collapsed .sidebar-toggle{width:44px;padding:0;margin-inline:auto}
.sidebar-collapsed .sidebar-toggle span{display:none}
.sidebar-collapsed main{width:100%;max-width:1320px;margin-inline:auto}
.main-card{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
.main-card .say-area,.main-card .action-area{min-width:0;padding:27px 30px}
.main-card .say-area{display:flex;flex-direction:column;gap:0;border-top:0;background:var(--soft-blue)}
.main-card .action-area{border-left:1px solid var(--line)}
.panel-heading{display:flex;align-items:center;gap:10px;margin-bottom:22px}
.panel-heading h3{font:650 14px var(--display);letter-spacing:.1px;margin:0}
.panel-tag{font:650 9px var(--mono);letter-spacing:1px;padding:5px 7px;border-radius:5px;background:#dce6f5;color:#506b94}
.action-area .panel-tag{background:var(--soft-green);color:var(--green)}
.main-card .say-area blockquote{font-size:19px;line-height:1.9;font-weight:520;margin:0;color:var(--blue)}
.inline-prompts{margin-top:24px;padding-top:21px;border-top:1px solid var(--line)}
.inline-prompts-label{margin:0 0 16px;font:650 10px var(--mono);letter-spacing:1px;color:var(--green)}
.inline-prompts .prompt{padding-bottom:16px;margin-bottom:16px}
.inline-prompts .prompt:last-child{padding-bottom:0;margin-bottom:0}
.inline-prompts .copy-button{min-height:36px}
.main-card .output-line{margin-top:auto;padding:20px 0 0;display:grid;gap:5px;background:transparent;border-top:1px solid #cad8eb;font-size:12px;line-height:1.7}
.main-card .output-line b{font-size:10px;color:#506b94;white-space:nowrap;font-weight:650;letter-spacing:.5px;line-height:1.7}

@media(max-width:1100px){
  .sidebar-collapsed .app-shell,.sidebar-collapsed.focus-mode .app-shell{grid-template-columns:52px minmax(0,1fr);gap:20px}
  .main-card .say-area,.main-card .action-area{padding:23px}
  .main-card .output-line{padding-top:18px}
  .main-card .actions li{font-size:15px}
}
@media(max-width:900px) and (min-width:761px){
  .main-card{grid-template-columns:1fr}
  .main-card .action-area{border-left:0;border-top:1px solid var(--line)}
}
@media(max-width:760px){
  .topbar-start{gap:7px}
  .sidebar-toggle{width:44px;min-height:44px;padding:0;flex:0 0 44px}
  .sidebar-toggle span{display:none}
  .sidebar-collapsed .app-shell,.sidebar-collapsed.focus-mode .app-shell{display:block;padding:0 18px}
  .sidebar-collapsed .sidebar{display:block;padding-bottom:0}
  .sidebar-collapsed main{max-width:none}
  .main-card{grid-template-columns:1fr}
  .main-card .say-area,.main-card .action-area{padding:21px 19px}
  .main-card .say-area{display:flex;grid-template-columns:none;gap:0}
  .main-card .action-area{border-left:0;border-top:1px solid var(--line)}
  .panel-heading{margin-bottom:17px}
  .main-card .say-area blockquote,.focus-mode .main-card .say-area blockquote{font-size:17px;line-height:1.9}
  .main-card .output-line{padding:17px 0 0;display:grid}
  .main-card .output-line b{margin-bottom:3px}
}

/* Larger type scale for live teaching and projected reading. */
body{font-size:18px}
.brand{font-size:14px}
.plain{font-size:15px}
.eyebrow{font-size:12px}
.course-heading h1{font-size:clamp(34px,3.15vw,47px)}
.course-heading>p:last-child{font-size:14px}
.nav-caption{font-size:12px}
.chapter-link{font-size:15px}
.chapter-link .nav-num,.nav-time{font-size:13px}
.task-heading h2{font-size:13px}
.manual{font-size:12px}
.task-name{font-size:17px}
#task-status{font-size:14px}
.task-disclaimer{font-size:12px}
.session-context{font-size:13px}
.clock{font-size:26px}
.clock-limit{font-size:12px}
.small-button{font-size:13px}
.icon-button{font-size:25px}
.chapter-meta{font-size:13px}
.time-pill{font-size:14px}
.chapter-title{font-size:clamp(30px,3.4vw,46px)}
.chapter-subtitle{font-size:17px}
.section-kicker{font-size:13px}
.actions li{font-size:19px}
.step-number{font-size:14px}
.quote-icon{font-size:57px}
.say-label{font-size:12px}
.say-area blockquote{font-size:21px}
.output-line{font-size:14px}
.output-line b{font-size:12px}
.external-link{font-size:14px}
.parallel-note{font-size:14px}
.parallel-note .parallel-symbol{font-size:22px}
summary{font-size:14px}
.detail-body ul{font-size:15px}
.prompt-head h3{font-size:14px}
.copy-button{font-size:13px}
.prompt p{font-size:15px}
.previous,.next{font-size:14px}
.page-footer{font-size:12px}
.page-footer summary,.page-footer a{font-size:12px}
.compare{font-size:14px}
.compare th{font-size:13px}
.remote-flow{font-size:14px}
.overview-intro h2{font-size:35px}
.overview-intro p{font-size:15px}
.overview-row time{font-size:14px}
.overview-row h3{font-size:19px}
.overview-row p{font-size:14px}
.overview-parallel{font-size:13px}
.focus-mode .chapter-title{font-size:52px}
.focus-mode .actions li{font-size:26px}
.focus-mode .say-area blockquote{font-size:30px}
.focus-mode .course-heading h1{font-size:35px}
.dialog-top h2{font-size:27px}
.muted{font-size:14px}
.prep-item{font-size:17px}
.dialog-bottom{font-size:14px}
#toast{font-size:15px}
.sidebar-toggle{font-size:14px}
.panel-heading h3{font-size:17px}
.panel-tag{font-size:11px}
.main-card .say-area blockquote{font-size:22px}
.inline-prompts-label{font-size:12px}
.main-card .output-line{font-size:14px}
.main-card .output-line b{font-size:12px}

@media(min-width:1500px){
  .actions li{font-size:21px}
  .say-area blockquote{font-size:24px}
}
@media(max-width:1100px){
  .chapter-link{font-size:14px}
  .nav-time{font-size:12px}
  .course-heading h1{font-size:38px}
  .main-card .actions li{font-size:18px}
}
@media(max-width:760px){
  .brand{font-size:12px}
  .plain{font-size:13px}
  .course-heading h1,.focus-mode .course-heading h1{font-size:35px}
  .course-heading .eyebrow{font-size:11px}
  .chapter-link .nav-label{font-size:14px}
  .nav-time{font-size:12px}
  .task-name{font-size:14px}
  #task-status{font-size:13px}
  .task-disclaimer{font-size:11px}
  .session-context{font-size:12px}
  .clock{font-size:24px}
  .clock-limit{font-size:11px}
  .small-button{font-size:12px}
  .chapter-title,.focus-mode .chapter-title{font-size:32px}
  .chapter-subtitle{font-size:15px}
  .actions li,.focus-mode .actions li,.main-card .actions li{font-size:18px}
  .say-area blockquote,.focus-mode .say-area blockquote,.main-card .say-area blockquote,.focus-mode .main-card .say-area blockquote{font-size:20px}
  .parallel-note{font-size:13px}
  .page-footer{font-size:11px}
  .remote-flow{font-size:13px}
  .overview-row h3{font-size:17px}
  .overview-row p{font-size:13px}
  .overview-row time{font-size:12px}
  .next{font-size:13px}
  .dialog-top h2{font-size:25px}
}

/* Keep evidence and recovery visible; long references stay in native disclosures. */
.timing-cue{font-size:14px;line-height:1.7;color:var(--muted);margin:-15px 0 25px}
.timing-cue.is-due{color:var(--orange);font-weight:650}
.chapter-cues{display:grid;grid-template-columns:1fr 1fr;gap:12px 24px;margin:0 0 24px;padding:18px 22px;border-left:3px solid var(--green);background:var(--soft-green);line-height:1.7}
.chapter-cues dt{font-size:13px;font-weight:700;color:var(--green);margin-bottom:4px}
.chapter-cues dd{font-size:16px;margin:0;overflow-wrap:anywhere}
.chapter-cues .fallback-cue{grid-column:1/-1;border-top:1px solid #ccded4;padding-top:12px}
.transition-note{margin-top:22px;padding-left:18px;border-left:3px solid var(--blue);line-height:1.8}
.transition-note b{font-size:13px;color:var(--muted)}
.transition-note p{margin:4px 0 0;font-size:18px}
.main-card .output-line{margin-top:24px}
.compare caption{padding:12px;text-align:left;font-size:14px}
.compare tbody th{white-space:normal}
.overview-evidence{color:var(--green)}
.support summary{min-height:48px}
.inline-prompts .copy-button{min-height:44px}
.detail-body{overflow-wrap:anywhere}
@media(max-width:760px){.chapter-cues{grid-template-columns:1fr;padding:16px}.chapter-cues dd{font-size:16px}.transition-note p{font-size:17px}.timing-cue{font-size:13px}.compare-wrap{max-width:100%}}