:root{--color-ink:#37352f;--color-muted:#686b63;--color-border:#e2e3de;--color-soft:#f1f5ef;--color-surface:#ffffff}
:root{--primary:var(--color-ink);--primary-hover:var(--color-ink);--ink:var(--color-ink);--muted:var(--color-muted);--bg:var(--color-surface);--surface:var(--color-surface);--border:var(--color-border);--soft:var(--color-soft);--danger:var(--color-muted);--radius:5px;--font:ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color-scheme:light}
*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--bg);font:15px/1.65 var(--font)}button,input,select,textarea{font:inherit}button,a,input,select,textarea{touch-action:manipulation}button{color:inherit;background:none;border:0;cursor:pointer}a{color:inherit;text-decoration:none;cursor:pointer}button:disabled{opacity:.4;cursor:not-allowed}button:active{filter:brightness(.92)}button,a,input,select,textarea,summary{outline-offset:3px}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:2px solid var(--color-muted)}main:focus{outline:none}svg.icon{width:19px;height:19px;flex:none;vertical-align:middle}h1,h2,h3,p{margin:0}h1{font-size:32px;line-height:1.35;letter-spacing:-.8px;font-weight:650}h2{font-size:19px;line-height:1.5;font-weight:600}h3{font-size:15px;font-weight:600}.small,small{font-size:13px}.muted,.hint{color:var(--muted)}.hidden{display:none!important}.skip{position:fixed;left:16px;top:-80px;z-index:200;background:var(--color-surface);padding:12px}.skip:focus{top:10px}
.shell{display:grid;grid-template-columns:224px minmax(0,1fr);min-height:100vh}.sidebar{position:sticky;top:0;height:100vh;padding:20px 12px;background:var(--soft);display:flex;flex-direction:column;border-right:1px solid var(--color-soft)}.brand{display:flex;align-items:center;gap:9px;font-size:17px;font-weight:600;margin:0 10px 20px}.brandmark{display:grid;place-items:center;width:28px;height:30px;color:var(--ink);border:1.5px solid currentColor;border-radius:4px;background:var(--color-surface)}.brandmark .icon{width:20px;height:20px}.sidebar-start{margin-bottom:12px}.sidebar-start .btn{justify-content:flex-start;color:var(--muted)}.nav{display:grid;gap:3px}.nav a{display:flex;align-items:center;gap:10px;min-height:44px;padding:9px 12px;border-radius:4px;font-size:14px;color:var(--color-muted)}.nav a:hover,.sidebar-start .btn:hover{background:var(--color-soft)}.nav a.active{background:var(--color-border);color:var(--ink);font-weight:550}.sidebar-bottom{margin-top:auto}.profile{display:flex;align-items:center;gap:9px;padding:10px;width:100%;margin-top:12px;text-align:left}.profile>.icon{margin-left:auto;color:var(--muted)}.avatar{display:grid;place-items:center;width:28px;height:28px;border-radius:4px;background:var(--color-border);font-size:11px}.workspace{min-width:0}.topbar{height:56px;padding:0 28px;display:flex;align-items:center;justify-content:space-between;gap:16px}.breadcrumb{display:flex;align-items:center;gap:9px;font-size:13px;min-width:0;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.breadcrumb .icon{width:16px;height:16px;color:var(--muted)}.top-actions{display:flex;align-items:center;gap:10px;flex:none}.prototype-label{font-size:11px;color:var(--muted)}.icon-btn{width:44px;min-height:44px;display:inline-grid;place-items:center;border-radius:4px}.icon-btn:hover{background:var(--soft)}main{max-width:1240px;margin:0 auto;padding:42px 64px 80px}.home-minimal{max-width:900px;margin:0 auto;padding-top:18px}.page-icon{margin-bottom:20px;color:var(--color-muted)}.page-icon .icon{width:42px;height:42px;stroke-width:1.25}.page-head{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:32px}.page-head p{margin-top:10px;font-size:13px;color:var(--muted)}.page-head p:empty{display:none}.btn-row{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:44px;padding:8px 13px;border:1px solid var(--color-border);background:var(--color-surface);border-radius:5px;font-size:13px;font-weight:500;white-space:nowrap;transition:background .12s}.btn:hover{background:var(--soft)}.btn.primary{background:var(--primary);color:var(--color-surface);border-color:var(--primary)}.btn.primary:hover{background:var(--primary-hover)}.btn.text{border-color:transparent;background:transparent}.btn.text:hover{background:var(--color-soft)}.btn.small{font-size:12px;min-height:44px;padding:7px 10px}.btn.danger{color:var(--danger)}.wide{width:100%}.tiny-link{display:inline-flex;align-items:center;gap:5px;font-size:12px;color:var(--muted);min-height:44px;padding:6px}.tiny-link:hover{color:var(--ink);background:var(--soft);border-radius:4px}.tiny-link .icon{width:15px;height:15px}.card{background:var(--color-surface);border:1px solid var(--border);border-radius:var(--radius)}.pad{padding:24px}.section-title{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:14px}.section-title h2{font-size:16px}.resume-panel{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:20px 22px;background:var(--soft);border-radius:5px;margin-bottom:40px}.resume-panel h2{font-size:17px;margin:4px 0;font-weight:550}.resume-panel p{font-size:12px;color:var(--muted)}.home-section{margin-top:30px}.session-list{border:0;border-radius:0;border-top:1px solid var(--border)}.session-row{width:100%;display:grid;grid-template-columns:24px minmax(0,1fr) 16px;gap:12px;padding:18px 8px;text-align:left;border-bottom:1px solid var(--border);background:var(--color-surface);align-items:center;border-radius:0}.session-row:hover{background:var(--color-soft)}.file-icon{color:var(--color-muted)}.file-icon .icon{width:21px;height:23px}.session-title{font-size:14px;font-weight:500}.session-meta{font-size:12px;color:var(--muted);margin-top:5px}.session-row>.icon{width:15px;height:15px;color:var(--color-muted)}.course-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-bottom:32px}.course-card{position:relative;min-width:0;text-align:left;padding:20px;border:1px solid var(--border);border-radius:5px}.course-card:hover,.course-card.selected{background:var(--soft)}.course-card.selected{border-color:var(--color-muted)}.course-card .code{position:absolute;right:16px;top:22px;font-size:10px;color:var(--muted)}.course-symbol{display:grid;place-items:center;width:32px;height:32px;background:var(--color-soft)!important;color:var(--color-muted)!important;border-radius:4px;margin-bottom:16px}.course-card h3{font-size:15px}.course-card p{font-size:12px;color:var(--muted);margin-top:4px}.course-card footer{display:flex;align-items:center;justify-content:space-between;font-size:11px;color:var(--muted);margin-top:20px}.course-card footer .icon{width:15px;height:15px}.course-detail-header{display:flex;align-items:center;gap:16px;padding:18px 20px;margin-bottom:24px}.course-detail-header .course-symbol{margin:0}.course-detail-header h2{font-size:17px}.course-detail-header p{font-size:12px;color:var(--muted)}.toolbar{display:flex;align-items:center;gap:10px;margin-bottom:24px;flex-wrap:wrap}.search-box{display:flex;align-items:center;gap:8px;min-height:44px;border:1px solid var(--color-border);border-radius:4px;padding:0 10px;background:var(--color-surface);min-width:0;flex:1}.search-box .icon{color:var(--color-muted);width:17px;height:17px}.search-box input{width:100%;min-width:0;padding:10px 0;border:0;outline:none;font-size:14px}.search-box:focus-within{outline:2px solid var(--color-muted);outline-offset:2px}.search-box input:focus-visible{outline:none}input,select,textarea{background:var(--color-surface);color:var(--ink);border:1px solid var(--color-border);border-radius:4px;padding:10px 12px;max-width:100%;font-size:14px}input::placeholder,textarea::placeholder{color:var(--color-muted)}select{min-height:44px}textarea{width:100%;line-height:1.8;resize:vertical}.field{display:flex;flex-direction:column;gap:8px;margin-bottom:22px}.field label{font-size:13px;font-weight:500}.field input,.field select{width:100%}.hint{font-size:12px}.field-pair{display:grid;grid-template-columns:1fr 1fr;gap:16px}.form-grid{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:28px;align-items:start}.form-grid>section{border:0;padding:0 28px 0 0}.form-grid>aside{min-width:0}.form-grid>aside .btn-row .btn{flex:1}.form-grid>aside .btn-row{justify-content:flex-start!important}.form-grid>aside h2{font-size:16px}.source-options{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:24px}.source-option{position:relative;text-align:left;border:1px solid var(--color-border);padding:18px;border-radius:5px;display:flex;flex-direction:column;gap:7px;min-width:0}.source-option .icon{color:var(--color-muted)}.source-option.selected{background:var(--soft);border-color:var(--color-ink)}.source-option.selected:after{content:'✓';position:absolute;right:12px;top:12px;font-size:12px}.source-option small{font-size:12px;color:var(--muted)}.source-option b{font-size:14px;font-weight:550}.prep-steps{display:flex;gap:28px;list-style:none;margin:0 0 30px;padding:0 0 18px;border-bottom:1px solid var(--border);color:var(--muted);font-size:12px}.prep-steps li{display:flex;align-items:center;gap:8px}.prep-steps b{font-size:11px;border:1px solid var(--border);border-radius:4px;width:24px;height:24px;display:grid;place-items:center;font-weight:500}.prep-steps .complete{color:var(--ink)}.prep-steps .complete b{background:var(--color-soft);padding:0}.level{height:72px;display:flex;align-items:center;justify-content:center;gap:4px;margin:12px 0}.level i{width:4px;max-width:3%;background:var(--color-border);border-radius:2px}.level.ready i{background:var(--color-muted)}.separator{border:0;border-top:1px solid var(--border);margin:24px 0}.check-row{display:flex;align-items:flex-start;gap:9px;font-size:13px;cursor:pointer}.check-row input{width:16px;height:16px;flex:none;margin:4px 0 0;accent-color:var(--primary)}.error-text{font-size:13px;color:var(--danger);margin-top:10px}.error-text:empty{margin:0}.keyterm{display:inline-block;background:var(--soft);color:var(--color-muted);padding:3px 8px;border:1px solid var(--border);border-radius:3px;font-size:12px;margin:4px 5px 4px 0;overflow-wrap:anywhere}.keyterm .icon{width:13px;height:13px}.back-link{display:inline-flex;align-items:center;gap:4px;color:var(--muted);font-size:12px;min-height:44px;margin-bottom:10px}.back-link .icon{width:16px}.back-link:hover{color:var(--ink)}.tabs{display:flex;flex-wrap:nowrap;overflow:auto;position:sticky;top:0;z-index:5;background:var(--color-surface);border-bottom:1px solid var(--border);margin:0 0 26px;padding:0;scrollbar-width:thin}.tab{min-height:48px;padding:10px 14px;white-space:nowrap;flex:none;color:var(--muted);font-size:13px;border-bottom:2px solid transparent}.tab:hover{background:var(--soft)}.tab.active{color:var(--ink);border-bottom-color:var(--ink);font-weight:550}.tab:focus-visible{outline-offset:-3px}.detail-layout{display:grid;grid-template-columns:minmax(0,1fr) 236px;gap:36px;align-items:start}.detail-content{min-width:0}.summary-intro{padding:0 0 24px;border-bottom:1px solid var(--border);margin-bottom:26px}.summary-intro h2{font-size:20px;margin-bottom:12px}.summary-intro p{font-size:16px;line-height:1.95}.summary-intro .cite{margin-top:10px}.tag{display:inline-flex;align-items:center;gap:5px;color:var(--muted);font-size:12px;background:var(--soft);padding:3px 7px;border-radius:3px}.tag .icon{width:13px;height:13px}.outline-item{padding:20px 0;border-bottom:1px solid var(--border)}.outline-item h3{display:flex;align-items:baseline;gap:12px;font-size:16px}.outline-item .num{font-size:12px;color:var(--color-muted);font-weight:400}.outline-item p{font-size:15px;line-height:1.95;margin:10px 0 6px;color:var(--color-ink)}.cite{display:inline-flex;align-items:center;gap:5px;min-height:44px;padding:5px 8px;font-size:12px;color:var(--muted);border-radius:4px}.cite:hover{background:var(--soft);color:var(--ink)}.cite .icon{width:14px;height:14px}.reading-toolbar{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-bottom:12px}.reading-toolbar .search-box{flex:1;min-width:160px}.reading-toolbar select{width:auto}.transcripts{padding:0 20px;min-width:0}.search-count{font-size:12px;color:var(--muted);padding:14px 0;border-bottom:1px solid var(--border)}.segment{padding:20px 0;border-bottom:1px solid var(--border);scroll-margin-top:90px}.segment:last-child{border-bottom:0}.timestamp{display:inline-flex;align-items:center;min-height:44px;padding:4px 8px;font-size:12px;color:var(--muted);background:var(--soft);border-radius:3px;font-variant-numeric:tabular-nums}.timestamp:hover{color:var(--ink);background:var(--color-soft)}.segment p{margin-top:12px;overflow-wrap:anywhere}.segment .en{font-size:15px;line-height:1.9;color:var(--color-muted)}.segment .zh{font-size:17px;line-height:1.95}.segment:has(.en):not(:has(.zh)) .en{font-size:17px;color:var(--ink)}.segment .cite{margin-top:6px}.segment.pending .zh{color:var(--muted)}.pending-label{font-size:12px;color:var(--muted);margin-top:10px}.highlight{background:var(--color-soft);outline:2px solid var(--color-muted);outline-offset:4px;border-radius:4px}.player{position:sticky;top:76px;padding:18px;border:0;border-left:1px solid var(--border);border-radius:0}.wave{display:flex;align-items:center;justify-content:center;gap:3px;height:72px;margin:10px 0;overflow:hidden}.wave i{width:3px;flex:1;min-width:1px;background:var(--color-border);border-radius:1px}.wave i:nth-child(-n+14){background:var(--color-muted)}.player-time{display:flex;justify-content:space-between;color:var(--muted);font-size:11px;font-variant-numeric:tabular-nums}.player>input{width:100%;padding:0;accent-color:var(--primary);margin:14px 0;min-height:24px}.player-actions{display:flex;align-items:center;justify-content:center;gap:10px;margin:8px 0}.play{width:44px;height:44px;display:grid;place-items:center;background:var(--primary);color:var(--color-surface);border-radius:50%}.lesson-metadata{margin-top:24px;border-top:1px solid var(--border);padding-top:16px}.lesson-metadata summary{font-size:12px;color:var(--muted);cursor:pointer;min-height:44px}.source-list{display:grid;gap:12px;font-size:12px;color:var(--muted)}.lesson-task-text{white-space:pre-wrap;overflow-wrap:anywhere;padding:20px 0;line-height:1.9;min-height:180px;border-top:1px solid var(--border);font-size:16px}.notice{display:flex;align-items:center;gap:10px;padding:12px 16px;background:var(--soft);border-radius:4px;margin-bottom:20px;color:var(--color-muted);font-size:13px}.notice.error{color:var(--danger);background:var(--color-soft)}.notice p{flex:1}.notice .icon{width:17px;height:17px}.empty{text-align:center;padding:40px 20px}.empty>.icon{color:var(--color-muted);margin-bottom:12px;width:30px;height:30px}.empty h2,.empty h3{font-size:16px;font-weight:500;color:var(--color-muted)}.empty p{font-size:13px;color:var(--muted);margin:10px auto 16px;max-width:400px}.empty .btn{margin-top:18px}.live-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:24px;align-items:start}.panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:18px 20px;border-bottom:1px solid var(--border);flex-wrap:wrap}.panel-head h2{font-size:16px}.live-layout .transcripts{height:520px;overflow:auto}.live-controls{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;padding:16px 20px;border-top:1px solid var(--border)}.live-status{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--muted);flex-wrap:wrap}.live-dot{width:6px;height:6px;border-radius:50%;background:var(--color-muted)!important}.timer{font-weight:500;font-variant-numeric:tabular-nums}.note-input{min-height:160px;margin-top:18px}.note-item{border-bottom:1px solid var(--border);padding:18px 0}.note-item p{font-size:15px;white-space:pre-wrap;overflow-wrap:anywhere;margin-top:8px}.marks-heading{margin:26px 0 12px}.settings-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}.settings-grid h2{font-size:17px;margin-bottom:24px}.settings-row{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:18px 0;border-top:1px solid var(--border)}.switch{height:26px;width:44px;flex:none;border-radius:20px;background:var(--color-border);padding:3px}.switch span{display:block;width:20px;height:20px;border-radius:50%;background:var(--color-surface);transition:transform .12s}.switch.on{background:var(--primary)}.switch.on span{transform:translateX(18px)}.settings-grid .muted{margin-bottom:20px}.mind-root{display:inline-block;padding:12px 18px;background:var(--primary);color:var(--color-surface);border-radius:4px;font-weight:550;margin-bottom:12px}.mind-branch{margin:14px 0 14px 18px;padding:8px 0 8px 22px;border-left:1px solid var(--color-border)}.mind-branch summary{cursor:pointer;font-weight:500;min-height:44px}.mind-branch ul{padding-left:20px;font-size:14px;color:var(--color-muted);line-height:2}.mind-tree{border:0;padding:0}.graph-canvas{border:1px solid var(--border);border-radius:5px;background:var(--color-soft);background-image:radial-gradient(var(--color-border) 1px,transparent 1px);background-size:18px 18px}.graph-canvas svg{width:100%;display:block}.graph-node{cursor:pointer}.graph-node:hover rect{stroke:var(--color-muted);stroke-width:2}.graph-node:focus-visible{outline:2px solid var(--color-muted)}.graph-list{display:flex;gap:6px;flex-wrap:wrap;margin-top:14px}.processing{max-width:600px;padding:32px;margin:32px auto}.processing>h2{font-size:22px}.progress-track{height:4px;border-radius:2px;background:var(--border);margin:28px 0}.progress-track span{display:block;height:100%;background:var(--primary);border-radius:2px}.process-step,.step{display:flex;align-items:center;gap:14px;padding:14px 0}.process-step h3{font-size:14px}.step-number{width:28px;height:28px;border-radius:4px;background:var(--soft);display:grid;place-items:center;font-size:12px;flex:none}.step-number .icon{width:16px}.process-step p{font-size:12px;color:var(--muted)}.login{max-width:360px;margin:100px auto}.login .brand{margin:0 0 40px}.login h1{font-size:28px;margin-bottom:28px}
dialog{width:520px;max-width:calc(100vw - 32px);max-height:calc(100dvh - 40px);border:1px solid var(--color-border);border-radius:8px;padding:0;color:var(--ink);box-shadow:0 12px 50px color-mix(in srgb, var(--color-ink) 13%, transparent)}dialog::backdrop{background:color-mix(in srgb, var(--color-ink) 33%, transparent)}.modal-head{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;border-bottom:1px solid var(--border)}.modal-head h2{font-size:17px}.modal-body{padding:22px 24px}.modal-body>p{font-size:14px;color:var(--color-muted);line-height:1.8;margin-bottom:20px}.modal-actions{display:flex;align-items:center;justify-content:flex-end;gap:8px;margin-top:24px;flex-wrap:wrap}.evidence{background:var(--soft);border-radius:4px;padding:18px;margin-top:16px}.evidence p{font-size:14px;line-height:1.9;margin-bottom:12px}.evidence p:last-child{margin-bottom:0}.edit-area{min-height:260px}#toast{position:fixed;bottom:26px;left:50%;transform:translateX(-50%) translateY(10px);background:var(--color-ink);color:var(--color-surface);padding:10px 18px;border-radius:5px;font-size:13px;max-width:calc(100vw - 32px);opacity:0;pointer-events:none;z-index:100;transition:opacity .15s,transform .15s}#toast.show{opacity:1;transform:translateX(-50%);pointer-events:auto}#toast button{color:var(--color-surface);text-decoration:underline;min-height:44px;padding:4px 10px}.mobile-nav{display:none}
@media(max-width:1100px){.shell{grid-template-columns:200px minmax(0,1fr)}main{padding:32px}.detail-layout{grid-template-columns:minmax(0,1fr);gap:26px}.detail-layout>aside{order:-1}.player{position:static;display:grid;grid-template-columns:1fr auto;gap:4px 18px;border:1px solid var(--border);border-radius:4px;padding:14px 18px}.player .wave,.player .lesson-metadata{display:none}.player>.tag{background:none;padding:0;grid-column:1;font-size:11px}.player-time{grid-column:1;grid-row:2}.player>input{grid-column:1;grid-row:3;margin:4px 0}.player-actions{grid-column:2;grid-row:1/4;margin:0}.form-grid{grid-template-columns:minmax(0,1fr) 280px;gap:20px}.form-grid>section{padding-right:0}.live-layout{grid-template-columns:minmax(0,1fr)}.live-layout>aside{display:grid;grid-template-columns:1fr 1fr;gap:20px}.live-layout>aside>.card{margin:0!important}.course-grid{gap:10px}.course-card{padding:16px}.course-card .code{position:static;display:block;margin-bottom:12px}.settings-grid{grid-template-columns:1fr}}
@media(max-width:700px){.shell{display:block}.sidebar{display:none}.topbar{height:52px;padding:0 18px}.breadcrumb{font-size:12px}.top-actions{gap:6px}main{padding:26px 20px calc(108px + env(safe-area-inset-bottom))}.home-minimal{padding-top:14px}.page-icon{margin-bottom:18px}.page-icon .icon{width:35px;height:35px}.page-head{align-items:flex-start;flex-wrap:wrap;gap:20px;margin-bottom:26px}.page-head h1{font-size:27px;overflow-wrap:anywhere}.page-head p{font-size:12px;line-height:1.8}.page-head .btn-row{width:100%}.resume-panel{padding:18px;gap:10px;margin-bottom:28px}.resume-panel h2{font-size:15px}.resume-panel .btn{padding:8px}.session-row{padding:17px 2px;gap:10px;grid-template-columns:20px minmax(0,1fr) 14px}.session-title{font-size:14px}.session-meta{font-size:11px}.home-section{margin-top:24px}.course-grid{grid-template-columns:1fr;margin-bottom:24px}.course-card{display:grid;grid-template-columns:32px minmax(0,1fr);column-gap:14px;padding:16px}.course-card .course-symbol{grid-column:1;grid-row:1/5;margin:0}.course-card .code{grid-column:2;font-size:10px;margin-bottom:4px}.course-card h3,.course-card p,.course-card footer{grid-column:2}.course-card footer{margin-top:8px;font-size:12px}.course-card p{font-size:12px}.course-detail-header{flex-wrap:wrap}.toolbar .search-box{flex-basis:100%}.toolbar select{flex:1;min-width:0}.form-grid{grid-template-columns:minmax(0,1fr);gap:24px}.form-grid>section{padding:0}.pad{padding:20px}.prep-steps{gap:12px;justify-content:space-between;font-size:11px}.prep-steps li{flex-direction:column;gap:6px;text-align:center}.source-options{gap:10px}.source-option{padding:16px 12px}.source-option small{font-size:11px}.tabs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));overflow:visible;margin-bottom:22px}.tab{padding:10px 4px;min-width:0;font-size:12px}.detail-layout{gap:22px}.summary-intro h2{font-size:19px}.summary-intro p{font-size:16px}.outline-item h3{font-size:15px;gap:9px}.outline-item p{font-size:15px}.reading-toolbar .search-box{flex-basis:100%}.reading-toolbar select{flex:1}.transcripts{padding:0 16px}.segment{scroll-margin-top:120px}.segment .zh{font-size:17px}.segment .en{font-size:15px}.search-count{font-size:11px}.live-layout>aside{display:block}.live-layout>aside>.card{margin-top:20px!important}.live-layout .transcripts{height:440px}.panel-head{padding:14px}.panel-head .btn-row{gap:4px}.live-controls{padding:14px;gap:8px}.live-controls .btn-row{gap:4px}.live-controls .btn{padding:8px 10px}.notice{flex-wrap:wrap}.player{padding:12px 14px;gap:4px 12px}.player-actions{gap:2px}.player-actions .icon-btn{width:40px}.player .play{width:40px;height:40px}.processing{padding:24px;margin:0}.mind-root{font-size:14px}.mind-branch{padding-left:16px;margin-left:12px}.modal-actions .btn{flex:1}.modal-body{padding:20px}.mobile-nav{position:fixed;bottom:0;left:0;right:0;z-index:20;display:grid;grid-template-columns:repeat(4,1fr);padding:6px 12px calc(6px + env(safe-area-inset-bottom));background:color-mix(in srgb, var(--color-surface) 97%, transparent);border-top:1px solid var(--border)}.mobile-nav a{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;min-height:52px;color:var(--muted);font-size:11px;border-radius:4px}.mobile-nav a.active{color:var(--ink);background:var(--color-soft)}.mobile-nav a.new{background:none;color:var(--ink)}.mobile-nav a.new.active{background:var(--color-soft)}.mobile-nav .icon{width:19px;height:19px}#toast{bottom:calc(88px + env(safe-area-inset-bottom))}.login{margin:50px auto}.settings-grid{gap:20px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
.real-prose{white-space:pre-wrap;overflow-wrap:anywhere;font-size:16px;line-height:1.95}.player audio{width:100%;min-width:0;margin-bottom:16px}.live-layout .pending-label{display:block}.live-layout>.card{min-width:0}.live-layout .segment{overflow-wrap:anywhere}#processing-mode{max-width:520px}#latency-status{font-variant-numeric:tabular-nums}
@media(max-width:700px){input,select,textarea{font-size:16px}.live-layout .transcripts{height:clamp(240px,50dvh,480px)}.live-controls{position:sticky;bottom:calc(70px + env(safe-area-inset-bottom));z-index:8;background:var(--color-surface)}.player:has(audio){display:block}.player:has(audio) .wave,.player:has(audio) .player-time,.player:has(audio)>input,.player:has(audio) .player-actions{display:none}.live-status{font-size:12px}.panel-head{gap:6px}#latency-status{font-size:11px}.real-prose{font-size:16px}}

.player:has(audio) .wave,.player:has(audio) .player-time,.player:has(audio)>input,.player:has(audio) .player-actions{display:none}

.analysis-section{border-top:1px solid var(--border);margin-top:24px;padding-top:8px}.analysis-section>summary,.mind-branch>summary{min-height:44px;cursor:pointer;overflow-wrap:anywhere;padding:10px 0}.analysis-section article{margin:16px 0}.analysis-section h3{font-size:15px;overflow-wrap:anywhere}.analysis-keywords{margin-top:24px;display:flex;flex-wrap:wrap;gap:8px}.mind-tree{min-width:0;overflow-wrap:anywhere}.mind-branch{min-width:0}.mind-branch .mind-branch{margin-left:8px;padding-left:12px}

.task-sources{border-top:1px solid var(--border);margin-top:24px;padding-top:12px}.task-sources p{overflow-wrap:anywhere;line-height:1.8;color:var(--muted)}

.overview-todos{margin-bottom:40px}.todo-row{border-bottom:1px solid var(--border);padding:8px 0 10px}.todo-main{display:flex;align-items:flex-start;gap:12px;min-height:44px;cursor:pointer;padding:10px 0;font-size:15px;line-height:1.65}.todo-main input{width:18px;height:18px;flex:0 0 18px;margin:4px 0;accent-color:var(--ink);cursor:pointer}.todo-main span{overflow-wrap:anywhere;white-space:pre-wrap}.todo-row.is-complete .todo-main span{text-decoration:line-through;color:var(--muted)}.todo-source{display:block;margin-left:30px;text-align:left;color:var(--muted);font-size:12px;min-height:36px;overflow-wrap:anywhere}.todo-source:hover{text-decoration:underline}.completed-todos{margin-top:12px}.completed-todos>summary{cursor:pointer;min-height:44px;padding:12px 0;font-size:13px;color:var(--muted)}.lesson-task-text .todo-row:last-child{border-bottom:0}
[hidden]{display:none!important}.auth-card{max-width:400px}.auth-card h1{margin-bottom:28px}.auth-card form{margin-top:20px}.auth-switch{font-size:14px;margin-top:24px;color:var(--muted)}.auth-switch a{text-decoration:underline;margin-left:8px}.account-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.balance-value{font-size:28px;margin:12px 0 24px}.account-rule{margin-top:20px}.table-wrap{overflow:auto;margin-top:20px}table{width:100%;border-collapse:collapse;font-size:14px}th,td{text-align:left;padding:14px 12px;border-bottom:1px solid var(--border)}th{color:var(--muted);font-weight:500}.reading-detail{grid-template-columns:minmax(0,860px);justify-content:center}.reading-detail>aside{display:none}.segment.is-playing{background:var(--color-soft);border-left:3px solid var(--ink);padding-left:18px}.segment{transition:background .15s;scroll-margin:180px 0 160px}.timestamp .icon{width:12px;height:12px;vertical-align:middle}#playback-dock{position:fixed;right:28px;bottom:20px;width:360px;padding:14px 16px;z-index:15;border:1px solid var(--border);border-radius:8px;background:var(--color-surface);box-shadow:0 4px 24px color-mix(in srgb, var(--color-ink) 5%, transparent)}#playback-dock p{font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-bottom:8px}#playback-dock audio{width:100%;height:40px}.workspace main{padding-bottom:180px}.todo-main input{padding:0}.source-option{margin-top:16px}@media(max-width:700px){.account-grid{grid-template-columns:1fr}#playback-dock{bottom:calc(76px + env(safe-area-inset-bottom));left:12px;right:12px;width:auto}.workspace main{padding-bottom:220px}.table-wrap table{min-width:430px}.segment{scroll-margin-top:150px}.auth-card{padding-top:12px}}
/* The audio element stays outside the rendered app so changing material tabs cannot interrupt it. */
#playback-dock{display:none!important}.workspace main{padding-bottom:64px}
.classroom-player{display:grid;grid-template-columns:260px minmax(0,1fr);border:1px solid var(--border);border-radius:14px;background:var(--color-soft);overflow:hidden;margin-bottom:30px;scroll-margin-top:20px}
.transport{padding:26px;display:flex;flex-direction:column;align-items:center;min-width:0}.record-sleeve{width:150px;height:150px;display:grid;place-items:center;background:var(--color-soft);border:1px solid var(--color-border);border-radius:8px;margin-bottom:20px}.vinyl{width:116px;height:116px;border-radius:50%;display:grid;place-items:center;background:repeating-radial-gradient(circle,var(--color-ink) 0 2px,var(--color-ink) 3px 4px);box-shadow:0 4px 12px color-mix(in srgb, var(--color-ink) 13%, transparent)}.vinyl span{height:43px;width:43px;border-radius:50%;background:var(--color-border);display:grid;place-items:center;color:var(--color-ink)}.vinyl .icon{width:19px}.track-meta{text-align:center;width:100%}.track-meta h2{font-size:16px;margin:4px 0;line-height:1.5;overflow-wrap:anywhere}.track-meta .small{font-size:12px}.transport-controls{display:flex;gap:16px;align-items:center;margin:18px 0 10px}.play-toggle{border-radius:50%;background:var(--ink);color:var(--color-surface);width:52px;height:52px;display:grid;place-items:center}.play-toggle .icon{width:23px;height:23px}.play-toggle:hover{background:var(--color-ink)}.play-toggle:disabled{opacity:.4;cursor:not-allowed}.skip-audio{width:44px;height:44px;font-size:12px;font-variant-numeric:tabular-nums;border-radius:50%}.skip-audio:hover{background:var(--color-border)}.track-progress{width:100%}.track-progress input{width:100%;height:24px;padding:0;accent-color:var(--ink);cursor:pointer;display:block;background:transparent}.track-times{display:flex;justify-content:space-between;font-variant-numeric:tabular-nums;font-size:11px;color:var(--muted)}.playback-options{display:flex;align-items:center;gap:12px;margin-top:10px}.playback-options select{background:transparent;min-height:40px;padding:4px 8px;border-color:transparent;font-size:12px}
.lyrics-pane{min-width:0;background:var(--color-surface);border-left:1px solid var(--border);padding:20px 0 0}.lyrics-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:0 22px 12px}.lyrics-heading h2{font-size:14px;font-weight:550}.lyrics-pane .reading-toolbar{padding:0 18px;gap:6px;margin-bottom:8px}.lyrics-pane .reading-toolbar .search-box{min-width:120px}.lyrics-pane .reading-toolbar select{font-size:12px;padding:8px;min-width:0}.lyrics-pane .reading-toolbar button{font-size:11px;padding:6px 8px}.lyrics-pane .search-box input{font-size:13px;min-width:0}.lyrics-pane .transcripts{position:relative;height:350px;overflow:auto;overscroll-behavior:contain;scrollbar-width:thin;border:0;border-radius:0;padding:0 22px 80px;scroll-behavior:auto;overflow-anchor:none;scroll-padding:18px}.lyrics-pane .segment{border:0;padding:18px 14px;margin:0 -8px;border-radius:8px;scroll-margin:0}.lyrics-pane .segment .timestamp{background:transparent;padding:0;font-size:11px;min-height:30px}.lyrics-pane .segment p{margin-top:6px}.lyrics-pane .segment .en{font-size:14px;line-height:1.7}.lyrics-pane .segment .zh{font-size:17px;line-height:1.8}.lyrics-pane .segment.is-playing{background:var(--color-soft);border-left:0;padding-left:14px}.lyrics-pane .segment .btn-row{opacity:.6}.lyrics-pane .segment:hover .btn-row,.lyrics-pane .segment:focus-within .btn-row{opacity:1}.lyrics-pane .segment .btn{font-size:11px;min-height:32px;padding:2px 6px}.lesson-materials{max-width:900px;margin:0 auto}.lesson-materials .tabs{position:static;display:flex}.lesson-materials #lesson-panel{min-height:200px}.is-playing .vinyl{animation:record-turn 18s linear infinite}@keyframes record-turn{to{transform:rotate(360deg)}}
@media(max-width:900px){.classroom-player{grid-template-columns:210px minmax(0,1fr)}.transport{padding:20px}.record-sleeve{width:130px;height:130px}.lyrics-pane .reading-toolbar .search-box{flex-basis:100%}}
@media(max-width:700px){.workspace main{padding-bottom:calc(108px + env(safe-area-inset-bottom))}.classroom-player{grid-template-columns:minmax(0,1fr);border-radius:12px;margin-bottom:24px}.transport{display:grid;grid-template-columns:64px minmax(0,1fr);gap:0 16px;padding:18px 18px 10px}.record-sleeve{width:64px;height:64px;margin:0;grid-row:1}.vinyl{width:52px;height:52px}.vinyl span{width:24px;height:24px}.vinyl .icon{width:13px}.track-meta{text-align:left;grid-column:2;grid-row:1}.track-meta h2{font-size:15px}.transport-controls{grid-column:1/3;justify-content:center;margin:12px 0 4px;gap:24px}.play-toggle{width:48px;height:48px}.track-progress{grid-column:1/3}.playback-options{grid-column:1/3;justify-content:center;margin:0}.lyrics-pane{border-left:0;border-top:1px solid var(--border);padding-top:14px}.lyrics-heading{padding:0 18px 8px}.lyrics-pane .reading-toolbar{padding:0 14px}.lyrics-pane .reading-toolbar .search-box{flex-basis:100%}.lyrics-pane .reading-toolbar input,.lyrics-pane .reading-toolbar select{font-size:16px}.lyrics-pane .reading-toolbar button{font-size:12px;min-height:44px}.lyrics-pane .transcripts{height:280px;padding:0 18px 64px}.lyrics-pane .segment .btn{min-height:44px}.lyrics-pane .segment .timestamp{min-height:44px}.lesson-materials .tabs{display:flex;overflow:auto}.lesson-materials .tab{flex:1;padding:10px 8px;font-size:12px}.page-head:has(+.classroom-player){margin-bottom:20px}}
.material-source{display:inline-flex;align-items:center;gap:10px;text-align:left;min-height:44px;flex-wrap:wrap;padding:4px 0;border-radius:4px;line-height:1.7}.material-source:hover{text-decoration:underline;text-underline-offset:4px}.material-source .icon{width:14px;height:14px;color:var(--muted)}.mind-branch>summary:has(.material-source){padding:0}.note-content{display:block;text-align:left;white-space:pre-wrap;overflow-wrap:anywhere;min-height:44px;font-size:15px;padding:8px 0;width:100%}.note-content:hover{text-decoration:underline;text-underline-offset:4px}
.note-body{display:block;margin-top:8px}
.transcript-search-toggle{display:none}
@media(max-width:700px){#main:has(.classroom-player){padding-top:16px}#main:has(.classroom-player) .back-link{margin-bottom:0}#main:has(.classroom-player)>.page-head{gap:8px;margin-bottom:16px}#main:has(.classroom-player)>.page-head h1{font-size:24px}.classroom-player .transport{position:relative}.track-meta h2{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.classroom-player .transport-controls{gap:16px}.classroom-player .playback-options{position:absolute;right:10px;top:94px;margin:0}.classroom-player .playback-options label{display:none}.classroom-player .playback-options select{width:58px;padding:4px;font-size:12px}.lyrics-pane .reading-toolbar .transcript-search-toggle{display:inline-flex;order:3}.lyrics-pane .reading-toolbar:not(.is-searching) .search-box{display:none}.lyrics-pane .reading-toolbar.is-searching .search-box{display:flex}.lyrics-pane .transcripts{height:clamp(180px,calc(28dvh - env(safe-area-inset-bottom)),240px)}}

.source-hint{margin:-8px 0 22px}.source-option:last-child:nth-child(odd){grid-column:1/-1}

.sound-level{display:grid;gap:6px;margin:12px 0;min-width:0}.sound-level meter{width:100%;height:14px}.live-layout .sound-level{padding:0 20px}.sound-level span{min-height:22px;overflow-wrap:anywhere}

/* Knowledge relationships remain readable and scroll inside their own canvas on phones. */

.profile small{display:block;font-size:11px;margin-top:3px}.account-identity{display:flex;align-items:center;gap:16px;margin-bottom:28px}.account-identity .avatar{width:48px;height:48px;flex:none;font-size:20px}.account-identity h2{font-size:18px;margin:0 0 6px}.account-identity p{overflow-wrap:anywhere;margin:4px 0}.account-grid>.card{min-width:0}.account-grid h2{font-size:16px;margin-bottom:20px}.personal-center .balance-value{margin:8px 0 16px}.personal-center .btn-row{margin-top:18px}.personal-center .page-head .btn-row{margin-top:0}.personal-center .account-rule{line-height:1.8}.personal-center .check-row{margin-bottom:20px}@media(max-width:700px){.personal-center .page-head .btn-row{width:auto}.personal-center .page-head{gap:12px}.personal-center .account-identity{align-items:flex-start}.account-identity>div{min-width:0}}

.agent-banner{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:24px;background:var(--color-soft);border:1px solid var(--color-border);border-radius:8px;margin:0 0 32px}.agent-banner h2{font-size:19px;margin:6px 0 8px}.agent-banner p,.agent-steps p{color:var(--muted);font-size:14px;line-height:1.8}.agent-label{font-size:12px;color:var(--color-ink);font-weight:600}.agent-page{max-width:900px;margin:auto}.agent-hero{background:var(--color-soft);border:1px solid var(--color-border);border-radius:8px;padding:32px}.agent-hero h2{font-size:28px;line-height:1.45;margin:10px 0 16px}.agent-hero>p{line-height:1.9;max-width:650px;color:var(--color-ink)}.agent-hero .btn-row{margin-top:24px}.agent-steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;padding:0;list-style:none;margin:28px 0}.agent-steps b{font-size:15px}.agent-steps p{margin-top:8px}.agent-page>p{line-height:1.8}#mcp-instructions{font-size:13px;line-height:1.8;overflow-wrap:anywhere}#mcp-copy-status{margin:12px 0;min-height:24px}.mobile-nav:has(a[href="#agent"]){grid-template-columns:repeat(5,minmax(0,1fr))}@media(max-width:700px){.agent-banner{align-items:stretch;flex-direction:column;gap:16px;padding:20px}.agent-hero{padding:22px}.agent-hero h2{font-size:24px}.agent-steps{grid-template-columns:1fr;gap:16px}#mcp-instructions{font-size:16px}.mobile-nav a{font-size:11px}}

/* Keep navigation compact without moving the reading area on hover. */
.avatar{border-radius:50%;overflow:hidden;flex:none;background:var(--color-border);color:var(--color-ink)}.avatar img{display:block;width:100%;height:100%;object-fit:cover}.avatar .icon{width:18px;height:18px}.account-identity .avatar{width:80px;height:80px}.account-identity .avatar .icon{width:36px;height:36px}.avatar-actions{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:12px 0 6px}.avatar-picker{position:relative;cursor:pointer}.avatar-picker input{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:pointer;padding:0}.avatar-picker:focus-within{outline:2px solid var(--color-muted);outline-offset:3px}.avatar-picker:has(input:disabled){opacity:.5;cursor:wait}.mobile-nav .avatar{width:22px;height:22px}.mobile-nav .avatar .icon{width:17px;height:17px}
@media(min-width:701px){.shell{grid-template-columns:76px minmax(0,1fr)}.sidebar{padding:16px 10px;z-index:30;overflow:visible}.sidebar .rail-link{position:relative;display:flex;align-items:center;justify-content:center;width:52px;min-height:48px;padding:0;border-radius:10px;color:var(--color-muted);gap:0;margin:0}.sidebar .brand{margin-bottom:24px}.sidebar .rail-link>.icon{width:22px;height:22px}.sidebar .rail-link:hover{background:var(--color-border);color:var(--ink)}.sidebar .rail-link.active{background:var(--color-border);color:var(--color-ink);box-shadow:inset 3px 0 var(--color-muted)}.sidebar-start{margin-bottom:20px}.nav{gap:8px}.sidebar-bottom{padding-top:16px}.sidebar .profile .avatar{width:34px;height:34px}.sidebar .profile.active{box-shadow:none;outline:1px solid var(--color-border)}.nav-tooltip{position:absolute;left:calc(100% + 12px);top:50%;transform:translate(-4px,-50%);width:max-content;max-width:240px;padding:7px 12px;border-radius:6px;background:var(--color-ink);color:var(--color-surface);font-size:13px;font-weight:500;line-height:1.6;box-shadow:0 3px 12px color-mix(in srgb, var(--color-ink) 13%, transparent);opacity:0;visibility:hidden;transition:opacity .14s,transform .14s;pointer-events:none}.rail-link:hover .nav-tooltip,.rail-link:focus .nav-tooltip{visibility:visible;opacity:1;transform:translate(0,-50%)}}
@media(max-width:700px){.account-identity .avatar{width:64px;height:64px}.account-identity .avatar .icon{width:30px;height:30px}.avatar-actions{gap:4px}}
@media(prefers-reduced-motion:reduce){.nav-tooltip{transition:none}}
@media(min-width:701px) and (max-height:600px){.sidebar{padding-top:12px;padding-bottom:12px}.sidebar .rail-link{min-height:44px}.sidebar .brand,.sidebar-start{margin-bottom:12px}.nav{gap:4px}.sidebar-bottom{padding-top:12px}}
.live-orbit{display:flex;align-items:center;gap:24px;padding:22px}.live-orbit>div:last-child{flex:1;min-width:0}.live-orbit .sound-level{padding:0;margin:8px 0}.nebula{--energy:0;position:relative;width:112px;height:112px;flex:none;border-radius:50%;background:radial-gradient(ellipse at center,var(--color-soft) 0,var(--color-soft) 40%,transparent 70%);overflow:hidden}.nebula-spin{position:absolute;inset:12px;animation:nebula-turn 7s linear infinite;animation-play-state:paused}.nebula.is-sounding .nebula-spin{animation-play-state:running}.nebula-spin i{position:absolute;inset:9px;border-radius:45% 55% 28% 72%;border:7px solid color-mix(in srgb, var(--color-muted) 50%, transparent);border-left-color:color-mix(in srgb, var(--color-muted) 67%, transparent);transform:rotate(25deg);filter:blur(2px)}.nebula-spin i:nth-child(2){inset:19px;transform:rotate(110deg);border-color:color-mix(in srgb, var(--color-muted) 60%, transparent);border-right-color:var(--color-border)}.nebula-spin i:nth-child(3){inset:29px;transform:rotate(210deg);border-color:var(--color-border)}.nebula>span{position:absolute;inset:46px;border-radius:50%;background:var(--color-surface);box-shadow:0 0 18px var(--color-border);opacity:calc(.5 + var(--energy)*.5)}.live-reading-controls{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:0 22px 14px}.live-layout #live-transcript{height:clamp(240px,42dvh,560px);overflow:auto;scroll-behavior:auto;overflow-anchor:none}.live-layout .segment:last-child{background:var(--color-soft)}.live-layout .segment .zh{font-size:20px;line-height:1.9}@keyframes nebula-turn{to{transform:rotate(360deg)}}@media(max-width:700px){.live-orbit{padding:16px;gap:12px}.nebula{width:88px;height:88px}.nebula>span{inset:35px}.live-reading-controls{padding:0 14px 12px}.live-reading-controls .muted{font-size:12px}.live-layout #live-transcript{height:36dvh;min-height:220px}}@media(prefers-reduced-motion:reduce){.nebula-spin{animation:none}.nebula.is-sounding{box-shadow:inset 0 0 24px color-mix(in srgb, var(--color-border) 50%, transparent)}}