.account-logout-anchor{border-radius:12px;min-width:0;position:relative}.account-logout-anchor>.button{width:100%}.account-logout-anchor[data-live=true]>.button{pointer-events:none}.account-logout-anchor:focus-visible{outline:2px solid var(--blue);outline-offset:3px}.account-logout-hint{z-index:40;border:1px solid var(--line);width:max-content;max-width:min(240px,100vw - 36px);color:var(--text);background:var(--surface);box-shadow:var(--shadow);visibility:hidden;opacity:0;pointer-events:none;border-radius:8px;padding:8px 11px;font-size:12px;font-weight:500;line-height:1.5;position:absolute;inset:auto 0 calc(100% + 8px) auto}.account-logout-anchor:not([data-hint-dismissed=true]):focus-within>.account-logout-hint{visibility:visible;opacity:1}@media (hover:hover){.account-logout-anchor:not([data-hint-dismissed=true]):hover>.account-logout-hint{visibility:visible;opacity:1}}@media (max-width:760px){.account-logout-hint{inset:calc(100% + 8px) 0 auto auto}}
:root{--background:#fbfcfe;--surface:#fff;--surface-soft:#f6f8fb;--text:#263244;--muted:#637085;--line:#e5eaf1;--blue:#2864ce;--blue-dark:#2055b3;--blue-soft:#eef4ff;--green:#16835b;--red:#c2414b;--shadow:0 8px 24px #1f2d480d;--radius:12px}*{box-sizing:border-box}html{background:var(--background)}body{color:var(--text);background:var(--background);-webkit-font-smoothing:antialiased;margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;font-size:15px}button,input{font:inherit}.auth-page{place-content:center;min-height:100dvh;padding:28px;display:grid}.auth-panel{border:1px solid var(--line);background:#fff;border-radius:18px;width:min(420px,100vw - 56px);padding:30px}.auth-panel h1{margin-top:32px;font-size:25px}.auth-panel p{color:var(--muted);font-size:13px;line-height:1.7}.auth-panel form{gap:18px;margin-top:24px;display:grid}.auth-panel label{gap:8px;font-size:13px;display:grid}.auth-links{color:var(--blue);justify-content:space-between;gap:18px;margin:24px 0;font-size:13px;display:flex}.auth-panel .auth-error{color:var(--red)}.account-control{gap:8px;margin-top:20px;font-size:12px;display:grid}button,a{-webkit-tap-highlight-color:transparent}a{color:inherit;text-decoration:none}.app-shell{min-height:100vh}.sidebar{z-index:20;width:238px;color:var(--text);background:var(--surface);border-right:1px solid var(--line);flex-direction:column;padding:28px 20px;display:flex;position:fixed;inset:0 auto 0 0}.brand{align-items:center;gap:12px;margin:0 8px 40px;display:flex}.brand-mark{width:42px;height:42px;color:var(--blue);background:var(--blue-soft);letter-spacing:.05em;border-radius:12px;place-items:center;font-size:13px;font-weight:800;display:grid}.brand strong,.brand small{display:block}.brand strong{color:var(--text);font-size:15px;font-weight:600}.brand small{color:var(--muted);margin-top:2px;font-size:12px}.sidebar nav{gap:8px;display:grid}.nav-item{color:var(--muted);border-radius:12px;justify-content:space-between;align-items:center;padding:12px 14px;font-size:14px;font-weight:600;display:flex}.nav-item:hover,.nav-item.active{color:var(--blue);background:var(--blue-soft)}.nav-label{align-items:center;gap:10px;display:inline-flex}.nav-beta-label{font-size:12px;font-weight:500}.page-title-label{color:var(--muted);vertical-align:middle;font-size:.55em;font-weight:500}.nav-count{text-align:center;min-width:24px;color:var(--muted);background:var(--surface-soft);border-radius:999px;padding:2px 7px;font-size:11px}.sidebar-note{color:#8493ac;align-items:center;gap:8px;margin-top:auto;padding:12px;font-size:11px;display:flex}.status-dot{background:#52d69a;border-radius:50%;width:7px;height:7px;box-shadow:0 0 0 4px #52d69a1a}.main-content{min-height:100vh;margin-left:238px}.page-container{width:min(1160px,100% - 64px);margin:0 auto;padding:54px 0 80px}.page-header,.class-hero{justify-content:space-between;align-items:flex-end;gap:32px;margin-bottom:38px;display:flex}.eyebrow{color:var(--muted);letter-spacing:.08em;margin:0 0 8px;font-size:11px;font-weight:600}h1,h2,h3,p{overflow-wrap:anywhere}h1{letter-spacing:-.025em;margin:0;font-size:clamp(27px,3vw,34px);font-weight:600;line-height:1.25}h2{letter-spacing:-.015em;margin:0;font-size:20px;font-weight:600}h3{margin:0;font-size:15px;font-weight:600}.page-description{color:var(--muted);margin:13px 0 0;font-size:15px;line-height:1.65}.button{cursor:pointer;border:1px solid #0000;border-radius:11px;justify-content:center;align-items:center;gap:7px;min-height:43px;padding:0 17px;font-size:13px;font-weight:550;transition:transform .15s,background .15s,border-color .15s;display:inline-flex}.button:hover:not(:disabled){transform:none}.button:disabled{opacity:.48;cursor:not-allowed}.button.primary{color:#fff;background:var(--blue);box-shadow:0 2px 3px #2563eb14}.button.primary:hover:not(:disabled){background:var(--blue-dark)}.button.secondary{color:#34415a;border-color:var(--line);background:#fff}.button.danger-button{color:var(--red);background:snow;border-color:#f0cfd2}.button.danger-button:hover:not(:disabled){background:#fff1f2;border-color:#dfaeb3}.button.large{min-height:50px;padding:0 23px;font-size:14px}.button.full-width{width:100%}.text-button{min-height:auto;color:var(--blue);background:0 0;margin-top:18px;padding:8px 0}.course-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;display:grid}.course-card{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);flex-direction:column;min-height:205px;padding:25px;transition:transform .18s,box-shadow .18s,border-color .18s;display:flex;box-shadow:0 8px 30px #1f2d4809}.course-card:hover{box-shadow:var(--shadow);border-color:#cbd7ed}.course-card-link{flex-direction:column;flex:1;min-width:0;display:flex}.course-card-topline{justify-content:space-between;align-items:center;display:flex}.course-code{color:var(--blue);letter-spacing:.06em;text-transform:uppercase;font-size:12px;font-weight:800}.arrow{color:#91a0b7;font-size:18px}.course-card h2{margin-top:auto;font-size:20px;line-height:1.3}.course-card p{color:var(--muted);margin:9px 0 0;font-size:13px}.tag-list{flex-wrap:wrap;gap:6px;margin-top:12px;display:flex}.tag-chip{color:#52698f;background:var(--blue-soft);border-radius:999px;padding:5px 8px;font-size:10px;font-weight:700}.course-heading-tags{margin-top:14px}.entity-actions{border-top:1px solid #edf0f5;align-items:center;gap:7px;margin-top:17px;padding-top:13px;display:flex}.small-action{border:1px solid var(--line);color:#617087;cursor:pointer;background:#fff;border-radius:8px;min-height:30px;padding:0 10px;font-size:10px;font-weight:750}.small-action:hover{color:var(--blue);background:#f7faff;border-color:#bfd0f3}.small-action.danger:hover{color:var(--red);background:#fff5f6;border-color:#efc8cc}.header-actions{flex-wrap:wrap;justify-content:flex-end;gap:9px;display:flex}.empty-panel{text-align:center;background:#ffffff8c;border:1px dashed #cfd7e4;border-radius:22px;align-content:center;place-items:center;gap:13px;min-height:390px;padding:48px;display:grid}.empty-panel.compact{min-height:300px}.empty-panel p{max-width:480px;color:var(--muted);margin:0 0 8px;line-height:1.6}.empty-illustration,.state-icon{width:64px;height:64px;color:var(--blue);background:var(--blue-soft);border-radius:20px;place-items:center;margin-bottom:6px;font-weight:800;display:grid}.modal-backdrop{z-index:100;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#0d152575;place-items:center;padding:24px;display:grid;position:fixed;inset:0}.modal{background:#fff;border-radius:20px;width:min(490px,100%);padding:28px;box-shadow:0 24px 70px #101c3040}.modal-heading{justify-content:space-between;align-items:flex-start;margin-bottom:24px;display:flex}.icon-button{color:#657188;cursor:pointer;background:#f2f4f8;border:0;border-radius:9px;place-items:center;width:34px;height:34px;padding:0;font-size:20px;display:grid}.icon-button:hover{background:#e9edf3}.icon-button.danger:hover{color:var(--red);background:#fff0f1}.modal form{gap:18px;display:grid}label{color:#34415a;gap:8px;font-size:13px;font-weight:700;display:grid}input:not([type=checkbox]):not([type=radio]){width:100%;height:46px;color:var(--text);background:#fff;border:1px solid #d8dee9;border-radius:10px;outline:0;padding:0 13px}input:not([type=checkbox]):not([type=radio]):focus{border-color:#7aa1f5;box-shadow:0 0 0 3px #2563eb1a}.checkbox-row{color:var(--text);cursor:pointer;grid-template-columns:18px minmax(0,1fr);align-items:start;gap:10px;font-size:13px;font-weight:500;line-height:1.7;display:grid}.checkbox-row input[type=checkbox]{appearance:auto;width:18px;min-width:18px;height:18px;accent-color:var(--blue);cursor:pointer;margin:2px 0 0;padding:0}.checkbox-row input[type=checkbox]:focus-visible{outline:2px solid var(--blue);outline-offset:3px}.checkbox-row input[type=checkbox]:disabled{cursor:not-allowed}.checkbox-row>span{overflow-wrap:anywhere;min-width:0}select{min-height:46px;color:var(--text);font:inherit;background:#fff;border:1px solid #d8dee9;border-radius:10px;padding:0 36px 0 13px}.form-help{color:var(--muted);margin:-4px 0 0;font-size:11px;line-height:1.55}.required,.optional{color:#9aa5b6;margin-left:6px;font-size:10px;font-weight:600}.required{color:var(--blue)}.modal-actions{justify-content:flex-end;gap:10px;margin-top:6px;display:flex}.beta-access-panel{border:1px solid var(--line);border-radius:var(--radius);background:#fff;gap:24px;width:100%;max-width:640px;padding:28px;display:grid}.beta-access-panel h2{margin:0;font-size:20px}.beta-access-panel p{color:var(--muted);margin:10px 0 0;font-size:14px;line-height:1.7}.beta-access-panel .beta-state{color:var(--green);align-items:center;gap:9px;font-weight:750;display:flex}.beta-access-panel .beta-countdown{color:var(--text);font-variant-numeric:tabular-nums;font-size:24px;font-weight:700}.beta-redeem-form{gap:10px;display:grid}.beta-redeem-form label{margin:0;font-size:14px}.beta-redeem-form>div{gap:9px;display:flex}.beta-redeem-form input{text-transform:uppercase;letter-spacing:.05em;min-width:0}.beta-redeem-form .button{white-space:nowrap}.beta-access-panel .beta-error{color:var(--red);margin:0}.beta-admin-link{border-top:1px solid var(--line);padding-top:20px}.beta-admin-link .small-action{font-size:14px}.admin-invite-create,.generated-invites,.invite-history{border:1px solid var(--line);border-radius:var(--radius);background:#fff;margin-bottom:22px;padding:25px}.admin-invite-create form{grid-template-columns:repeat(auto-fit,minmax(180px,1fr));align-items:end;gap:14px;display:grid}.invite-custom-duration{grid-template-columns:minmax(0,1fr) 85px;gap:10px;display:grid}.generated-invite-batch h3{margin:18px 0 0;font-size:14px;font-weight:600}.admin-invite-create input:disabled{color:#687389;background:var(--surface-soft)}.admin-invite-create .form-help{margin:14px 0 0}.generated-invites{background:#f8fbff;border-color:#bed2fa}.generated-invites>div{justify-content:space-between;align-items:center;gap:20px;display:flex}.generated-invites pre{color:#243454;background:#fff;border-radius:12px;margin:18px 0 10px;padding:18px;font-size:14px;line-height:1.7;overflow-x:auto}.generated-invites p{color:var(--red);margin:0;font-size:12px}.invite-filter{grid-template-columns:auto 130px;align-items:center;gap:10px;display:flex}.invite-table-wrap{margin-top:18px;overflow-x:auto}.invite-table-wrap table{border-collapse:collapse;width:100%;font-size:12px}.invite-table-wrap th,.invite-table-wrap td{text-align:left;border-bottom:1px solid var(--line);white-space:nowrap;padding:13px 10px}.invite-table-wrap th{color:#7b879a;letter-spacing:.04em;text-transform:uppercase;font-size:10px}.invite-status{color:#56647a;background:#f1f3f6;border-radius:999px;padding:5px 8px;font-size:10px;font-weight:800}.invite-status.active{color:var(--green);background:#eaf8f2}.invite-status.revoked{color:var(--red);background:#fff0f1}.panel-empty-copy{color:var(--muted);margin:20px 0 0}.breadcrumbs{color:#8490a4;align-items:center;gap:9px;margin-bottom:34px;font-size:12px;display:flex}.breadcrumbs a:hover{color:var(--blue)}.course-detail-heading{align-items:center}.class-list{border:1px solid var(--line);border-radius:var(--radius);background:#fff;overflow:hidden}.class-row{border-bottom:1px solid var(--line);align-items:center;min-height:88px;padding:11px 18px 11px 23px;transition:background .15s;display:flex}.class-row:last-child{border-bottom:0}.class-row:hover{background:#f9fbff}.class-row-link{flex:1;grid-template-columns:52px 1fr auto 24px;align-items:center;gap:15px;min-width:0;padding:8px 0;display:grid}.class-actions{border-top:0;border-left:1px solid var(--line);flex:none;margin:0 0 0 16px;padding:0 0 0 15px}.class-number{color:#9aa6b9;font-variant-numeric:tabular-nums;font-size:12px}.class-row-copy strong,.class-row-copy small{display:block}.class-row-copy strong{font-size:15px}.class-row-copy small{color:var(--muted);margin-top:6px;font-size:12px}.analysis-pill,.success-label{color:#667389;background:#f1f3f6;border-radius:999px;padding:5px 9px;font-size:10px;font-weight:800}.analysis-pill.completed,.success-label{color:var(--green);background:#eaf8f2}.class-hero{align-items:center;margin-bottom:28px}.class-workspace{grid-template-columns:1fr;align-items:start;gap:20px;display:grid}.workspace-panel{border:1px solid var(--line);border-radius:var(--radius);background:#fff;min-height:520px;padding:25px;box-shadow:0 10px 30px #1f2d4809}.materials-panel{min-height:auto}.materials-panel .panel-empty{min-height:220px}.panel-heading{border-bottom:1px solid var(--line);justify-content:space-between;align-items:flex-start;gap:20px;padding-bottom:20px;display:flex}.count-badge{text-align:center;min-width:30px;color:var(--blue);background:var(--blue-soft);border-radius:999px;padding:5px 9px;font-size:11px;font-weight:800}.material-list{gap:10px;margin:18px 0;padding:0;list-style:none;display:grid}.material-list li{background:#fbfcfe;border:1px solid #e7ebf2;border-radius:12px;grid-template-columns:42px minmax(0,1fr) auto;align-items:center;gap:12px;padding:12px;display:grid}.material-icon,.empty-file-icon{color:#d04751;background:#fff0f1;border-radius:9px;place-items:center;font-size:9px;font-weight:900;display:grid}.material-icon{width:42px;height:42px}.material-icon.word{color:#2858a4;background:#edf4ff}.material-icon.image{color:#7a4da0;background:#f6effb}.material-copy{min-width:0}.material-copy strong,.material-copy small{display:block}.material-copy strong{text-overflow:ellipsis;white-space:nowrap;font-size:12px;overflow:hidden}.material-copy small{color:var(--muted);margin-top:5px;font-size:10px}.material-actions{gap:7px;display:flex}.panel-empty{text-align:center;align-content:center;place-items:center;gap:10px;min-height:360px;padding:36px;display:grid}.panel-empty p{max-width:390px;color:var(--muted);margin:0 0 7px;font-size:13px;line-height:1.6}.empty-file-icon{border-radius:12px;width:58px;height:70px;margin-bottom:5px}.preview-empty{min-height:395px}.preview-content{grid-template-columns:1fr 1fr;gap:0 28px;padding:8px 0;display:grid}.preview-section{border-bottom:1px solid var(--line);padding:18px 0}.preview-section h3{margin-bottom:11px}.preview-section ul{color:#4d5a70;gap:8px;margin:0;padding-left:18px;font-size:12px;line-height:1.55;display:grid}.preview-section p{color:#4d5a70;margin:0;font-size:12px;line-height:1.7}.preview-section .muted{color:#929daf}.preview-wide{grid-column:1/-1}.preview-overview{padding:22px 0}.bilingual-copy{gap:5px;display:grid}.bilingual-copy p[lang=en]{color:#27364f;font-weight:600}.bilingual-copy p[lang=zh-Hans]{color:#68758a}.bilingual-list{gap:13px;margin:0;padding-left:21px;display:grid}.bilingual-list li{color:#4d5a70;padding-left:4px}.term-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;display:grid}.term-item{background:#fbfcfe;border:1px solid #e7ebf2;border-radius:11px;grid-template-columns:minmax(0,1fr) auto;gap:5px 14px;padding:13px 14px;display:grid}.term-item strong{color:#263751;font-size:12px}.term-item>span{color:var(--blue);font-size:12px;font-weight:700}.term-item small{color:#7c8799;grid-column:1/-1;font-size:10px;line-height:1.55}.formula-list,.code-highlight-list{gap:12px;display:grid}.formula-item,.code-highlight{background:#fbfcfe;border:1px solid #e3e8f0;border-radius:12px;padding:15px}.formula-item>code{color:#203d70;white-space:pre-wrap;background:#edf4ff;border-radius:8px;margin-bottom:12px;padding:11px 13px;font-size:13px;display:block;overflow-x:auto}.formula-item dl{gap:7px;margin:13px 0 0;display:grid}.formula-item dl>div{border-top:1px solid #e8ecf2;grid-template-columns:minmax(55px,auto) 1fr;gap:13px;padding-top:7px;display:grid}.formula-item dt{color:#203d70;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:11px;font-weight:800}.formula-item dd{color:#68758a;gap:2px;margin:0;font-size:11px;line-height:1.5;display:grid}.code-highlight{position:relative}.code-language{color:#94a0b2;text-transform:uppercase;font-size:9px;font-weight:800;position:absolute;top:10px;right:12px}.code-highlight pre{color:#dce7fa;white-space:pre;background:#1c2940;border-radius:9px;margin:0 0 12px;padding:15px;font-size:11px;line-height:1.6;overflow-x:auto}.syntax-note{border-top:1px solid #e5e9f0;margin-top:12px;padding-top:11px}.syntax-note>strong{color:#536179;letter-spacing:.04em;text-transform:uppercase;margin-bottom:6px;font-size:10px;display:block}.quick-preview{background:var(--blue-soft);border:0;border-radius:13px;grid-column:1/-1;margin-top:18px;padding:20px}.quick-preview p{color:#314d83}.start-lecture-strip{border-radius:var(--radius);color:#fff;background:#1b2a47;justify-content:space-between;align-items:center;gap:30px;margin-top:20px;padding:28px 30px;display:flex}.start-lecture-strip .eyebrow{color:#7da5fa}.start-lecture-strip p:last-child{color:#aebbd1;margin:8px 0 0;font-size:12px}.error-banner,.notice-banner{color:#94343d;background:#fff4f5;border:1px solid #f2c7cb;border-radius:11px;margin:0 0 18px;padding:13px 16px;font-size:12px;line-height:1.5}.notice-banner{color:#795d19;background:#fffbea;border-color:#efdfae}.spinner{border:3px solid #dbe5f8;border-top-color:var(--blue);border-radius:50%;width:23px;height:23px;animation:.8s linear infinite spin;display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}.page-state{text-align:center;align-content:center;place-items:center;gap:13px;min-height:70vh;padding:40px;display:grid}.page-state p{max-width:480px;color:var(--muted);margin:0 0 10px}.live-page{flex-direction:column;width:min(1200px,100% - 64px);min-height:100vh;margin:0 auto;padding:34px 0 28px;display:flex}.live-header{justify-content:space-between;align-items:flex-end;gap:30px;padding-bottom:22px;display:flex}.live-header h1{font-size:30px}.enhancement-control{border:1px solid var(--line);background:#f8faff;border-radius:15px;justify-content:space-between;align-items:center;gap:24px;margin-bottom:18px;padding:18px 22px;display:flex}.enhancement-control label{color:#31415c;cursor:pointer;font-size:14px;font-weight:750}.enhancement-control p{color:var(--muted);margin:6px 0;font-size:12px;line-height:1.6}.enhancement-control small{color:#7b879a;font-size:11px}.enhancement-switch{appearance:none;cursor:pointer;background:#ccd5e2;border:0;border-radius:999px;flex:0 0 46px;width:46px;height:27px;margin:0;padding:3px;transition:background .15s}.enhancement-switch:before{content:"";background:#fff;border-radius:50%;width:21px;height:21px;transition:transform .15s;display:block;box-shadow:0 1px 3px #0002}.enhancement-switch:checked{background:var(--blue)}.enhancement-switch:checked:before{transform:translate(19px)}.enhancement-switch:focus-visible{outline-offset:3px;outline:3px solid #aac4f4}.enhancement-switch:disabled{cursor:not-allowed;opacity:.6}.back-link{color:var(--muted);margin-bottom:22px;font-size:12px;display:inline-block}.back-link:hover{color:var(--blue)}.listening-status{border:1px solid var(--line);color:#677287;letter-spacing:.03em;background:#fff;border-radius:999px;align-items:center;gap:9px;padding:9px 13px;font-size:11px;font-weight:800;display:inline-flex}.live-dot{background:#a9b2c1;border-radius:50%;width:8px;height:8px}.listening-status.listening .live-dot{background:#ef4e57;animation:1.6s ease-in-out infinite pulse;box-shadow:0 0 0 5px #ef4e571c}.listening-status.reconnecting .live-dot,.listening-status.connecting .live-dot{background:#e7a735}@keyframes pulse{50%{box-shadow:0 0 0 8px #ef4e570a}}.transcript-stage{border:1px solid var(--line);min-height:540px;box-shadow:var(--shadow);background:#fff;border-radius:20px;flex:1;overflow:auto}.live-welcome{text-align:center;align-content:center;place-items:center;gap:13px;min-height:540px;padding:50px;display:grid}.live-welcome h2{font-size:28px}.live-welcome>p:not(.eyebrow){max-width:520px;color:var(--muted);margin:0 0 12px;line-height:1.65}.microphone-symbol{width:64px;height:64px;color:var(--blue);background:var(--blue-soft);border-radius:50%;place-items:center;margin-bottom:9px;font-size:18px;display:grid}.transcript-history{min-height:390px;padding:26px 34px}.transcript-section-label{color:#8692a5;letter-spacing:.08em;text-transform:uppercase;justify-content:space-between;gap:20px;margin-bottom:25px;font-size:10px;font-weight:800;display:flex}.transcript-line{border-bottom:1px solid #eef1f5;grid-template-columns:54px minmax(0,1fr);gap:16px;padding:15px 0;display:grid}.transcript-line time{color:#96a1b3;font-variant-numeric:tabular-nums;padding-top:5px;font-size:11px}.transcript-line p{letter-spacing:-.01em;margin:0;font-family:Georgia,Times New Roman,serif;font-size:clamp(18px,2vw,23px);line-height:1.55}.transcript-line small{color:#8a96aa;margin-top:7px;font-size:10px;display:block}.semantic-history{width:100%;max-width:940px;margin:0 auto}.semantic-transcript-block{grid-template-columns:54px minmax(0,1fr);gap:18px;padding:20px 0 24px;display:grid}.semantic-transcript-block+.semantic-transcript-block{border-top:1px solid #eef1f5}.semantic-transcript-block time{color:#96a1b3;font-variant-numeric:tabular-nums;padding-top:7px;font-size:11px}.semantic-transcript-block p{color:#24324a;letter-spacing:-.01em;margin:0;font-family:Georgia,Times New Roman,serif;font-size:clamp(18px,2vw,23px);line-height:1.7}.semantic-transcript-block.settling p{color:#59677d}.semantic-transcript-block small{color:#96a1b3;margin-top:8px;font-size:10px;display:block}.pending-transcript-stage{width:100%;max-width:940px;margin:0 auto;padding:4px 34px 26px}.pending-transcript-stage .transcript-section-label{margin-bottom:8px}.pending-transcript-toggle{text-align:left;cursor:pointer;background:0 0;border:0;border-radius:4px;align-items:center;width:100%;min-height:36px;padding:4px 0}.pending-transcript-toggle:hover{color:var(--blue)}.pending-transcript-toggle:focus-visible{outline:2px solid var(--blue);outline-offset:4px}.pending-transcript-toggle-meta{letter-spacing:0;flex-shrink:0;align-items:center;gap:8px;font-weight:500;display:inline-flex}.pending-transcript-toggle[aria-expanded=true] svg{transform:rotate(180deg)}.pending-transcript-row{border-top:1px solid #f0f2f5;grid-template-columns:54px minmax(0,1fr);gap:18px;padding:13px 0;display:grid}.pending-transcript-row time{color:#a3acba;font-variant-numeric:tabular-nums;padding-top:4px;font-size:11px}.pending-transcript-row p{color:#8a95a6;margin:0;font-family:Georgia,Times New Roman,serif;font-size:clamp(17px,1.8vw,21px);line-height:1.6}.pending-transcript-row p.transcript-translation{white-space:pre-wrap;margin-top:8px;font-family:inherit;font-size:clamp(16px,1.6vw,19px);line-height:1.85}.transcript-placeholder{color:#9aa5b6;text-align:center;margin:70px 0;font-size:13px}.partial-stage{background:#f6f9ff;border-top:1px solid #dbe3ef;padding:22px 34px 28px;position:sticky;bottom:0}.partial-stage .transcript-section-label{color:var(--blue);margin-bottom:13px}.partial-text{color:#1b3f87;min-height:42px;margin:0;font-family:Georgia,Times New Roman,serif;font-size:clamp(21px,2.5vw,29px);line-height:1.45}.partial-text.waiting{color:#8b9bb7;font-family:inherit;font-size:14px}.audio-meter{background:#dbe5f7;border-radius:999px;width:88px;height:5px;overflow:hidden}.audio-meter i{transform-origin:0;border-radius:inherit;background:var(--blue);width:100%;height:100%;transition:transform 80ms linear;display:block}.live-controls{border:1px solid var(--line);background:#fff;border-radius:15px;justify-content:space-between;align-items:center;gap:24px;margin-top:16px;padding:17px 20px;display:flex}.live-controls strong,.live-controls span{display:block}.live-controls strong{font-size:12px}.live-controls span{color:var(--muted);margin-top:4px;font-size:10px}.stop-button{color:#fff;background:#d9444f}.stop-button:hover:not(:disabled){background:#bd3540}.reflow-debug{color:#7b879a;background:#fafbfd;border:1px dashed #cfd7e4;border-radius:10px;margin:14px 24px 20px;padding:12px 14px;font-size:10px}.reflow-debug summary{cursor:pointer;letter-spacing:.04em;font-weight:800}.reflow-debug dl{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px 16px;margin:12px 0 0;display:grid}.reflow-debug dl>div{min-width:0}.reflow-debug dt{color:#9aa5b6}.reflow-debug dd{overflow-wrap:anywhere;color:#526078;margin:3px 0 0}.records-workspace{grid-template-columns:repeat(2,minmax(0,1fr));margin-top:20px}.record-panel{min-height:310px}.compact-empty{min-height:220px}.record-summary{gap:18px;padding-top:22px;display:grid}.record-summary>p{color:var(--muted);margin:0;font-size:13px;line-height:1.65}.record-summary dl{gap:10px;margin:0;display:grid}.record-summary dl>div{border-bottom:1px solid var(--line);justify-content:space-between;gap:20px;padding-bottom:10px;display:flex}.record-summary dt{color:var(--muted);font-size:12px}.record-summary dd{color:#31415c;margin:0;font-size:12px;font-weight:750}.stacked-actions{gap:3px;display:grid}.warning-label{color:#8b6518;background:#fff5d9;border-radius:999px;padding:5px 9px;font-size:10px;font-weight:800}.inline-error{color:var(--red);line-height:1.5}.choice-overlay{z-index:100;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);background:#0d15257a;place-items:center;padding:24px;display:grid;position:fixed;inset:0}.choice-dialog{background:#fff;border-radius:20px;width:min(520px,100%);padding:30px;box-shadow:0 24px 70px #101c3047}.choice-dialog h2{margin-bottom:12px}.choice-dialog>p:not(.eyebrow){color:var(--muted);margin:0;font-size:13px;line-height:1.7}.choice-actions{flex-wrap:wrap;gap:10px;margin-top:24px;display:flex}.choice-actions .text-button{margin:0;padding:0 12px}.reading-page{width:min(980px,100% - 64px)}.reading-header{justify-content:space-between;align-items:flex-end;gap:30px;margin-bottom:28px;display:flex}.reading-header h1{font-size:clamp(32px,4vw,46px)}.reading-header>div>p:last-child{color:var(--muted);margin:10px 0 0}.reading-actions{align-items:center;gap:12px;display:flex}.toggle-control{border:1px solid var(--line);cursor:pointer;background:#fff;border-radius:10px;grid-template-columns:none;align-items:center;gap:9px;padding:10px 13px;font-size:12px;display:flex}.toggle-control input{width:15px;height:15px;margin:0}.transcript-metadata{border:1px solid var(--line);color:var(--muted);background:#fff;border-radius:13px;flex-wrap:wrap;gap:24px;margin-bottom:20px;padding:15px 19px;font-size:11px;display:flex}.transcript-metadata strong{color:#31415c;margin-right:4px;font-size:12px}.transcript-document{border:1px solid var(--line);-webkit-user-select:text;user-select:text;background:#fff;border-radius:18px;padding:25px 32px;box-shadow:0 10px 30px #1f2d4809}.transcript-document-row{border-bottom:1px solid #edf0f5;grid-template-columns:58px minmax(0,1fr);gap:18px;padding:19px 0;display:grid}.transcript-document-row:last-child{border-bottom:0}.transcript-document-row time{color:#8f9aad;font-variant-numeric:tabular-nums;padding-top:4px;font-size:11px}.transcript-document-row>div>p{color:#24324a;margin:0;font-family:Georgia,Times New Roman,serif;font-size:19px;line-height:1.72}.raw-transcript{background:#f6f7f9;border-radius:9px;margin-top:12px;padding:10px 13px}.raw-transcript summary{color:#8a95a7;text-transform:uppercase;cursor:pointer;font-size:10px;font-weight:800}.raw-transcript p{color:#6e798a;margin:7px 0 0;font-size:13px;line-height:1.6}.reading-empty{text-align:center;background:#ffffffa6;border:1px dashed #cfd7e4;border-radius:20px;align-content:center;place-items:center;gap:13px;min-height:390px;padding:42px;display:grid}.reading-empty p{max-width:520px;color:var(--muted);margin:0 0 8px;line-height:1.65}.notes-page{width:min(1260px,100% - 64px)}.notes-header{margin-bottom:18px}.notes-layout{grid-template-columns:220px minmax(0,1fr);align-items:start;gap:30px;display:grid}.notes-toc{border:1px solid var(--line);background:#fff;border-radius:15px;gap:5px;padding:18px;display:grid;position:sticky;top:24px}.notes-toc a{color:#637086;border-radius:8px;padding:8px 9px;font-size:11px;font-weight:650}.notes-toc a:hover{color:var(--blue);background:var(--blue-soft)}.notes-toc small{border-top:1px solid var(--line);color:#919cad;margin-top:12px;padding-top:12px;font-size:9px;line-height:1.5}.notes-document{border:1px solid var(--line);-webkit-user-select:text;user-select:text;background:#fff;border-radius:18px;overflow:hidden;box-shadow:0 12px 34px #1f2d480b}.notes-section{border-bottom:1px solid var(--line);padding:30px 36px;scroll-margin-top:24px}.notes-section:last-child{border-bottom:0}.notes-section>h2{color:#1e2d46;margin-bottom:21px;font-size:20px}.notes-bilingual-copy{gap:7px;display:grid}.notes-bilingual-copy p{margin:0;font-size:14px;line-height:1.75}.notes-bilingual-copy p[lang=en]{color:#28364d}.notes-bilingual-copy p[lang=zh-Hans]{color:#68758a}.notes-item-list,.notes-formula-list,.notes-code-list,.comparison-list{gap:13px;display:grid}.notes-item{background:#fbfcfe;border:1px solid #e7ebf2;border-radius:12px;padding:17px 18px}.notes-item h3,.notes-formula h3,.comparison-table h3{color:#263751;gap:4px;margin-bottom:10px;font-size:14px;display:grid}.notes-item h3 small,.notes-formula h3 small,.comparison-table h3 small{color:#728096;font-size:12px;font-weight:600}.notes-item-heading{justify-content:space-between;gap:18px;display:flex}.coverage-badge{color:#386e5a;background:#eaf8f2;border-radius:999px;flex:none;height:fit-content;padding:4px 8px;font-size:9px;font-weight:800}.notes-item>small,.notes-formula>small{color:#929daf;margin-top:10px;font-size:9px;display:block}.notes-formula,.notes-code,.comparison-table{background:#fbfcfe;border:1px solid #e3e8f0;border-radius:13px;padding:20px}.formula-expression{color:#173b7c;white-space:pre-wrap;background:#edf4ff;border-radius:9px;margin:12px 0;padding:14px 16px;font-size:15px;display:block;overflow-x:auto}.notes-formula dl{gap:7px;margin:16px 0;display:grid}.notes-formula dl>div{border-top:1px solid var(--line);grid-template-columns:minmax(60px,auto) 1fr;gap:15px;padding-top:8px;display:grid}.notes-formula dt{color:#26487f;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;font-weight:800}.notes-formula dd{color:#68758a;gap:4px;margin:0;font-size:12px;line-height:1.5;display:grid}.professor-note,.comparison-difference{background:#f3f7ff;border-left:3px solid #8aaaf1;border-radius:4px 9px 9px 4px;margin-top:16px;padding:14px}.professor-note>strong,.comparison-difference>strong{color:#43587d;text-transform:uppercase;letter-spacing:.04em;margin-bottom:7px;font-size:10px;display:block}.notes-code{position:relative}.notes-code pre{color:#dce7fa;white-space:pre;background:#1c2940;border-radius:9px;margin:0 0 15px;padding:18px;font-size:12px;line-height:1.7;overflow-x:auto}.comparison-columns{border:1px solid var(--line);background:var(--line);border-radius:9px;grid-template-columns:1fr 1fr;gap:1px;display:grid;overflow:hidden}.comparison-columns>div{background:#fff;padding:14px}@media (max-width:1020px){.course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.class-workspace{grid-template-columns:1fr}.workspace-panel{min-height:auto}.notes-layout{grid-template-columns:1fr}.notes-toc{flex-wrap:wrap;display:flex;position:static}.notes-toc .eyebrow,.notes-toc small{width:100%}.admin-invite-create form{grid-template-columns:repeat(2,minmax(180px,1fr))}}@media (max-width:760px){.sidebar{flex-flow:wrap;align-items:center;gap:12px;width:100%;height:auto;padding:14px 18px;position:static}.brand{margin:0 auto 0 0}.brand small,.sidebar-note,.nav-count{display:none}.sidebar nav{flex-basis:100%;order:2;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px;display:grid}.sidebar .account-control{margin-top:0;margin-left:auto}.nav-item{justify-content:center;padding:10px 8px}.main-content{margin-left:0}.page-container,.live-page{width:min(100% - 32px,650px);padding-top:30px}.page-header,.class-hero,.start-lecture-strip,.live-header,.reading-header{flex-direction:column;align-items:flex-start}.course-grid{grid-template-columns:1fr}.course-card{min-height:165px}.class-row{flex-direction:column;align-items:stretch;padding:10px 15px}.class-row-link{grid-template-columns:38px 1fr 20px;width:100%}.class-actions{border-top:1px solid var(--line);border-left:0;justify-content:flex-end;margin:0;padding:9px 0 0}.analysis-pill{display:none}.preview-content,.term-grid{grid-template-columns:1fr}.quick-preview{grid-column:auto}.start-lecture-strip .button{width:100%}.transcript-history{padding:22px 20px}.partial-stage{padding:20px}.transcript-line{grid-template-columns:44px minmax(0,1fr);gap:9px}.semantic-transcript-block{grid-template-columns:44px minmax(0,1fr);gap:10px}.pending-transcript-stage{padding-left:20px;padding-right:20px}.pending-transcript-row{grid-template-columns:44px minmax(0,1fr);gap:10px}.reflow-debug dl{grid-template-columns:repeat(2,minmax(0,1fr))}.live-controls{flex-direction:column;align-items:stretch}.records-workspace{grid-template-columns:1fr}.header-actions{justify-content:flex-start;width:100%}.material-list li{grid-template-columns:36px minmax(0,1fr)}.material-actions{grid-column:1/-1;justify-content:flex-end;padding-top:2px}.reading-actions{flex-wrap:wrap;width:100%}.transcript-document{padding:17px}.transcript-document-row{grid-template-columns:45px minmax(0,1fr);gap:10px}.notes-section{padding:24px 20px}.comparison-columns{grid-template-columns:1fr}.beta-access-panel{padding:22px}.beta-redeem-form>div{flex-direction:column;align-items:stretch}.admin-invite-create form{grid-template-columns:1fr}.generated-invites>div{flex-direction:column;align-items:flex-start}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important}}.live-shell{height:100dvh;min-height:0;overflow:hidden}.live-shell .main-content{flex-direction:column;height:100%;min-height:0;display:flex;overflow:hidden}.live-shell .storage-status{flex:none;max-height:18dvh;margin:12px 32px 0;overflow-y:auto}.quick-shell .quick-page{flex-direction:column;flex:1;min-height:0;padding:24px 0 12px;display:flex;overflow:hidden auto}.quick-shell .quick-heading,.quick-shell .quick-controls{flex:none}.quick-shell .quick-reader-frame{flex:1 1 0;min-height:0}.quick-shell .quick-reader{flex:1 1 0;height:auto;min-height:0}.quick-shell .quick-empty{min-height:0}.quick-shell .quick-page>.quick-experiment{flex:none;max-height:min(24dvh,200px);margin-top:10px;overflow-y:auto}.quick-shell .notice-banner{flex:none;max-height:16dvh;overflow-y:auto}.live-shell .live-page{flex:1;grid-template-rows:auto minmax(0,1fr) auto;min-height:0;padding:16px 0 0;display:grid;overflow:hidden}.live-shell .live-header{flex-direction:row;align-items:center;gap:16px;min-width:0;padding-bottom:16px}.live-shell .live-header>div:first-child{min-width:0}.live-shell .live-header h1{text-overflow:ellipsis;white-space:nowrap;font-size:clamp(20px,2.5vw,30px);overflow:hidden}.live-shell .live-header .back-link{margin-bottom:10px}.live-shell .listening-status{flex-shrink:0}.transcript-window{min-height:0;position:relative;overflow:hidden}.transcript-window .transcript-stage{overscroll-behavior-y:contain;overflow-anchor:none;scrollbar-gutter:stable;scroll-behavior:auto;height:100%;min-height:0;overflow:hidden auto}.transcript-stage:focus-visible{outline-offset:-3px;outline:2px solid #93b5f7}.transcript-scroll-content{flex-direction:column;min-height:100%;padding-bottom:0;display:flex}.transcript-scroll-content>*{flex:none}.transcript-window[data-return-to-live=true] .transcript-scroll-content{padding-bottom:76px}.transcript-scroll-content>.error-banner,.transcript-scroll-content>.notice-banner{margin:16px 20px}.transcript-window .partial-stage{margin-top:auto;padding-top:16px;padding-bottom:16px;position:static}.transcript-window .partial-stage .transcript-section-label{margin-bottom:8px}.transcript-window .partial-text{overflow-wrap:anywhere;min-height:0}.transcript-window .transcript-history{min-height:0}.transcript-window .live-welcome{min-height:0;padding:36px 24px}.return-to-live-position{pointer-events:none;justify-content:center;display:flex;position:absolute;bottom:16px;left:0;right:0}.return-to-live{pointer-events:auto;color:#28529a;cursor:pointer;background:#fff;border:1px solid #c8d7ef;border-radius:999px;align-items:center;gap:12px;max-width:calc(100% - 32px);min-height:44px;padding:10px 18px;font-size:13px;font-weight:700;display:inline-flex;box-shadow:0 4px 18px #17223a18}.return-to-live span{color:#7b879a;font-size:11px;font-weight:500}.return-to-live:focus-visible{outline-offset:2px;outline:3px solid #aac4f4}.live-shell .live-controls{z-index:5;min-height:100px;padding:16px 20px max(16px, env(safe-area-inset-bottom));border-radius:15px 15px 0 0;grid-template-columns:minmax(0,1fr) auto auto;gap:16px;margin-top:12px;display:grid;position:sticky;bottom:0}.live-controls .enhancement-control{background:0 0;border:0;border-radius:0;gap:14px;margin:0;padding:0}.live-controls .enhancement-control label{font-size:12px}.live-controls .enhancement-control small{margin-top:5px;font-size:10px;display:block}.live-controls .live-primary-action{min-width:130px;min-height:48px}.live-controls .live-primary-action:hover:not(:disabled){transform:none}.live-caption-settings{flex-wrap:wrap;align-items:center;gap:14px 24px;display:flex}.classroom-start-settings{margin:20px 0}.classroom-start-settings .enhancement-control{margin-bottom:10px;padding:12px 16px;font-size:14px}.classroom-start-settings small{margin-top:6px;display:block}.semantic-transcript-block p.transcript-translation,.transcript-document-row p.transcript-translation{color:#3b4a60;letter-spacing:normal;white-space:pre-wrap;margin-top:8px;font-family:inherit;font-size:clamp(16px,1.6vw,19px);line-height:1.85}.translation-unavailable{color:#738094;margin-top:8px;font-size:12px;display:block}.translation-unavailable button{color:#385d92;cursor:pointer;background:0 0;border:0;margin-left:10px;padding:2px 4px}@media (max-width:1150px){.live-shell .live-controls{grid-template-columns:minmax(0,1fr) auto;gap:10px 16px}.live-control-status{grid-area:1/1}.live-caption-settings{grid-area:2/1;gap:10px 20px}.live-controls .enhancement-control small{display:none}.live-controls .live-primary-action{grid-area:1/2/3;align-self:center}}@media (max-width:760px){.live-shell{flex-direction:column;display:flex}.live-shell .sidebar{flex:none}.live-shell .main-content{flex:1;height:auto}.live-shell .storage-status{margin:8px 16px 0}.live-shell .live-page{width:calc(100% - 24px);padding-top:8px}.live-shell .live-header{gap:8px;padding-bottom:10px}.live-shell .live-header .eyebrow{margin-bottom:4px;font-size:10px}.live-shell .listening-status{padding:8px;font-size:10px}.live-shell .live-controls{min-height:114px;padding:12px 14px max(12px, env(safe-area-inset-bottom));grid-template-columns:minmax(0,1fr) auto;gap:10px 14px;margin-top:8px}.live-control-status{grid-area:1/1}.live-controls .enhancement-control{grid-area:2/1;justify-content:flex-start}.live-controls .enhancement-control small{display:none}.live-caption-settings{grid-area:2/1;gap:8px 12px}.live-controls .live-primary-action{grid-area:1/2/3;align-self:center;min-width:104px}}.storage-status{margin:1rem 2rem 0}.storage-details{color:#667085;margin-bottom:.75rem;font-size:.82rem}.storage-details summary{cursor:pointer;width:fit-content}.storage-details p{overflow-wrap:anywhere;margin:.65rem 0}.backup-controls{flex-direction:column;gap:.35rem;display:inline-flex}.backup-feedback{color:#667085;max-width:28rem;margin:.25rem 0;font-size:.8rem}.error-text{color:#b42318}.backup-dialog{background:#fff;border-radius:20px;width:min(560px,100vw - 2rem);padding:2rem;box-shadow:0 24px 80px #15244830}.backup-dialog p{color:#667085;margin:.8rem 0;line-height:1.7}.emergency-actions{flex-wrap:wrap;align-items:center;gap:.6rem;margin-top:.7rem;display:flex}.recovery-panel{background:#f7f9ff;border:1px solid #d4def5;border-radius:16px;margin-bottom:1rem;padding:1.3rem}.recovery-panel p{color:#667085;margin:.65rem 0;line-height:1.65}.audio-source-dialog{border:1px solid var(--line);width:min(520px,100vw - 32px);max-height:calc(100dvh - 40px);color:inherit;margin:auto;overflow-y:auto}.audio-source-dialog::backdrop{background:#14231e59}.audio-source-options{gap:12px;margin:20px 0;display:grid}.audio-source-option{text-align:left;border:1px solid var(--line);background:var(--surface-soft);color:inherit;cursor:pointer;font:inherit;border-radius:14px;gap:6px;padding:18px;display:grid}.audio-source-option:hover:not(:disabled){background:var(--blue-soft);border-color:var(--blue)}.audio-source-option:disabled{cursor:not-allowed;background:#f5f6f8;border-style:dashed}.audio-source-option:disabled strong{color:var(--muted)}.audio-source-option:focus-visible{outline:2px solid var(--blue);outline-offset:3px}.audio-source-option>span,.audio-source-option>small{color:var(--muted);font-size:14px;line-height:1.6}.audio-source-option strong{align-items:center;gap:9px;font-size:16px;display:flex}.audio-source-tag{color:var(--muted);background:#fff;border-radius:5px;padding:2px 7px;font-size:12px;font-weight:500}.audio-source-help{margin-bottom:20px}.audio-source-help p{color:var(--muted);margin:6px 0;font-size:14px;line-height:1.6}.audio-source-help #computer-audio-support{color:var(--text)}.audio-source-notice{background:var(--surface-soft);border-radius:10px;padding:12px;line-height:1.65}.live-source-status{flex-shrink:0;justify-items:end;gap:6px;display:grid}.live-display-actions{align-items:center;gap:10px;display:flex}.transcript-layout-toggle{border:1px solid var(--line);width:34px;height:34px;color:var(--muted);cursor:pointer;background:0 0;border-radius:50%;flex-shrink:0;place-items:center;padding:0;display:grid}.transcript-layout-toggle:hover{color:var(--blue);background:var(--blue-soft)}.transcript-layout-toggle:focus-visible{outline:2px solid var(--blue);outline-offset:2px}.transcript-reader-tools{background:var(--surface);flex:none;justify-content:flex-end;align-items:center;gap:8px;padding:6px 12px;display:flex}.transcript-window[data-has-toolbar=true]{border:1px solid var(--line);background:var(--surface);border-radius:16px;flex-direction:column;display:flex}.transcript-window[data-has-toolbar=true] .transcript-stage{height:auto;box-shadow:none;border:0;border-radius:0;flex:1}.live-page[data-transcript-layout=split] .transcript-bilingual-pair{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:10px 40px;min-width:0;display:grid}.live-page[data-transcript-layout=split] .transcript-bilingual-pair>*{overflow-wrap:anywhere;min-width:0}.live-page[data-transcript-layout=split] .transcript-bilingual-pair>.transcript-translation,.live-page[data-transcript-layout=split] .transcript-bilingual-pair>.translation-unavailable{border-left:0;grid-column:2;margin-top:0;padding-left:0}.live-page[data-transcript-layout=split] .partial-text{overflow-wrap:anywhere;width:calc(50% - 20px)}@media (max-width:600px){.live-page[data-transcript-layout=split] .transcript-bilingual-pair{gap:10px 22px}.live-page[data-transcript-layout=split] .partial-text{width:calc(50% - 11px)}.live-page[data-transcript-layout=split] .semantic-transcript-block,.live-page[data-transcript-layout=split] .pending-transcript-row{grid-template-columns:minmax(0,1fr);gap:8px}}@media (pointer:coarse){.transcript-layout-toggle{width:44px;height:44px}}.live-source-status .text-button{min-height:32px;padding:4px 8px;font-size:12px}
button,input,textarea,select{font:inherit}button,summary,a,input,textarea,select{outline-offset:4px}:focus-visible{outline:2px solid var(--blue)}.icon-button{place-items:center;display:inline-grid}.workspace-hero{align-items:center;margin-bottom:34px}.workspace-hero .page-description{margin-top:10px;font-size:14px}.workspace-section-heading{justify-content:space-between;align-items:center;gap:20px;margin-bottom:18px;display:flex}.workspace-heading-copy{align-items:center;gap:11px;min-width:0;display:flex}.workspace-heading-copy>svg{color:var(--muted);flex-shrink:0}.workspace-section-heading h2{font-size:17px;font-weight:600}.workspace-heading-copy p{color:var(--muted);margin:7px 0 0;font-size:12px;line-height:1.7}.workspace-count{color:var(--muted);font-variant-numeric:tabular-nums;font-size:12px}.class-material-workspace{border:1px solid var(--line);background:var(--surface);border-radius:12px;padding:24px}.workspace-file-list{margin:0;padding:0;list-style:none}.workspace-file-list>li{border-top:1px solid var(--line);align-items:center;gap:15px;padding:17px 0;display:flex}.workspace-file-list>li:first-child{border-top:0}.workspace-file-icon{color:#75869e;background:var(--surface-soft);border-radius:8px;flex:none;place-items:center;width:43px;height:49px;display:grid}.workspace-file-icon.textbook{color:var(--blue);background:var(--blue-soft)}.workspace-file-name{text-align:left;cursor:pointer;min-width:0;color:var(--text);background:0 0;border:0;flex:1;padding:6px 0}.workspace-file-name:hover strong{color:var(--blue)}.workspace-file-name strong,.workspace-transcript-row strong,.class-material-empty strong{overflow-wrap:anywhere;font-size:14px;font-weight:550;display:block}.workspace-file-name small,.workspace-transcript-row small,.class-material-empty small{color:var(--muted);margin-top:6px;font-size:12px;line-height:1.6;display:block}.workspace-transcript-row{border-top:1px solid var(--line);align-items:center;gap:15px;margin-top:10px;padding:21px 0 0;display:flex}.workspace-transcript-row>span:nth-child(2){flex:1}.workspace-transcript-row>svg{color:var(--muted)}.workspace-transcript-row:hover strong{color:var(--blue)}.workspace-transcript-empty{border-top:1px solid var(--line);color:var(--muted);align-items:center;gap:9px;margin-top:15px;padding-top:18px;font-size:12px;display:flex}.class-material-empty{text-align:left;width:100%;color:var(--text);cursor:pointer;background:0 0;border:0;align-items:center;gap:16px;padding:30px 8px;display:flex}.class-material-empty>span:nth-child(2){flex:1}.class-material-empty>svg{color:var(--muted)}.class-material-empty:hover{background:var(--surface-soft);border-radius:8px}.study-tools{grid-template-columns:1fr 1fr;gap:26px;margin-top:22px;display:grid}.study-tool{border-radius:10px;align-items:center;gap:16px;padding:24px 12px;display:flex}.study-tool:hover{background:var(--blue-soft)}.study-tool-icon{color:var(--blue);align-self:flex-start;padding-top:2px}.study-tool>div{flex:1}.study-tool>svg{color:#8a99af}.study-tool h2{font-size:16px;font-weight:550}.study-tool p{color:var(--muted);margin:8px 0 0;font-size:13px;line-height:1.6}.study-tool small{color:var(--blue);margin-top:8px;font-size:11px;display:block}.workspace-menu{flex:none;position:relative}.workspace-menu>summary{width:38px;height:38px;color:var(--muted);cursor:pointer;border-radius:8px;place-items:center;list-style:none;display:grid}.workspace-menu>summary::-webkit-details-marker{display:none}.workspace-menu>summary:hover,.workspace-menu[open]>summary{background:var(--surface-soft)}.workspace-menu-content{z-index:22;border:1px solid var(--line);background:#fff;border-radius:10px;min-width:192px;max-width:calc(100vw - 40px);padding:6px;position:absolute;top:calc(100% + 5px);right:0;box-shadow:0 9px 26px #18263b12}.workspace-menu-content>button,.workspace-menu-content .button{text-align:left;width:100%;min-height:36px;color:var(--text);cursor:pointer;box-shadow:none;white-space:nowrap;background:0 0;border:0;border-radius:5px;justify-content:flex-start;padding:10px 12px;font-size:13px;font-weight:450;display:flex}.workspace-menu-content button:hover{background:var(--surface-soft)}.workspace-menu-content .danger,.workspace-menu-content .danger-button{color:var(--red)}.workspace-menu-content .backup-controls{display:block}.textbook-library{background:var(--surface);border:1px solid var(--line);border-radius:12px;margin:4px 0 34px;padding:22px}.textbook-library .workspace-section-heading{margin-bottom:5px}.textbook-empty{color:var(--muted);margin:20px 0 2px;font-size:12px}.textbook-manager-heading{gap:16px}.textbook-manager-heading>button{white-space:nowrap;flex-shrink:0}.class-list-heading{justify-content:flex-start;gap:10px;margin-bottom:15px}.class-row{box-shadow:none;border-radius:10px}.class-row-link{padding-top:20px;padding-bottom:20px}.class-number{background:var(--surface-soft);color:var(--muted);font-weight:500}.class-row-copy strong{font-weight:550}.analysis-pill{font-size:11px;font-weight:450}.workspace-dialog{color:var(--text);border:1px solid var(--line);background:var(--surface);border-radius:14px;width:min(480px,100vw - 28px);max-width:none;max-height:calc(100dvh - 36px);padding:24px;overflow:auto;box-shadow:0 24px 90px #14233c24}.workspace-dialog.wide{width:min(760px,100vw - 28px)}.workspace-dialog::backdrop{-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);background:#17203350}.workspace-dialog-heading{justify-content:space-between;align-items:flex-start;gap:15px;margin-bottom:22px;display:flex}.workspace-dialog-heading h2{padding-top:4px;font-size:20px;line-height:1.5}.workspace-dialog-heading .icon-button{flex-shrink:0}.workspace-tabs{border-bottom:1px solid var(--line);gap:25px;margin-bottom:23px;display:flex}.workspace-tabs button{color:var(--muted);cursor:pointer;background:0 0;border:0;border-bottom:2px solid #0000;align-items:center;gap:8px;margin-bottom:-1px;padding:8px 0 14px;font-size:14px;display:flex}.workspace-tabs button[aria-selected=true]{border-bottom-color:var(--blue);color:var(--blue)}.workspace-field{color:var(--text);flex-direction:column;gap:9px;margin:16px 0;font-size:13px;display:flex}.workspace-field input,.workspace-field select{width:100%;min-height:42px;color:var(--text);background:#fff;border:1px solid #d9e0eb;border-radius:8px;padding:10px 12px}.workspace-field .optional{color:var(--muted);font-size:11px;display:inline}.material-dropzone{background:var(--surface-soft);width:100%;min-height:200px;color:var(--muted);cursor:pointer;border:1px dashed #bdcadb;border-radius:10px;flex-direction:column;justify-content:center;align-items:center;gap:15px;padding:38px 20px;display:flex}.material-dropzone strong{color:var(--text);font-size:14px;font-weight:500}.material-dropzone span{font-size:12px}.material-dropzone:hover,.material-dropzone.dragging{border-color:var(--blue);background:var(--blue-soft)}.workspace-help{color:var(--muted);margin:13px 0;font-size:12px;line-height:1.7}.upload-selection{padding:0;list-style:none}.upload-selection li{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:12px;padding:12px 0;font-size:13px;display:flex}.upload-selection small{color:var(--muted);margin-top:5px;font-size:11px;display:block}.workspace-dialog-footer{border-top:1px solid var(--line);justify-content:space-between;align-items:center;gap:16px;margin-top:24px;padding-top:20px;display:flex}.workspace-dialog-footer>span{color:var(--muted);max-width:54%;font-size:11px;line-height:1.7}.workspace-dialog-footer>div{gap:9px;display:flex}.workspace-zero{text-align:center;color:var(--muted);padding:36px 20px}.workspace-zero h3{color:var(--text);margin-top:15px}.workspace-zero p{font-size:13px;line-height:1.8}.pdf-range-fields{grid-template-columns:minmax(70px,1fr) auto minmax(70px,1fr) 1fr;align-items:center;gap:12px;display:grid}.pdf-range-fields>span{color:var(--muted);margin-top:26px}.pdf-range-fields>strong{color:var(--blue);align-self:end;margin-bottom:28px;font-size:12px;font-weight:500}.pdf-range-preview{background:var(--surface-soft);border-radius:10px;gap:20px;padding:16px;display:flex}.pdf-preview-button{color:var(--muted);cursor:pointer;background:0 0;border:0;flex:1;min-width:0;padding:0}.pdf-preview-button>span{justify-content:space-between;align-items:center;margin-bottom:12px;font-size:12px;display:flex}.pdf-page-preview{text-align:center;margin:0 auto}.pdf-page-preview canvas{background:#fff;height:auto;box-shadow:0 1px 8px #17223a14}.pdf-page-preview figcaption{color:var(--muted);margin-top:10px;font-size:11px}.pdf-page-preview p{color:var(--muted);font-size:12px}.pdf-reader-toolbar{justify-content:space-between;align-items:center;gap:12px;margin:15px 0;display:flex}.pdf-page-controls{color:var(--muted);align-items:center;gap:5px;font-size:12px;display:flex}.pdf-page-controls input{border:1px solid var(--line);font-variant-numeric:tabular-nums;border-radius:5px;max-width:65px;min-height:34px;padding:5px}.pdf-reader-page,.pdf-range-browser{background:var(--surface-soft);border-radius:10px;padding:18px}.pdf-range-browser{margin-bottom:20px}.pdf-select-endpoints{justify-content:center;gap:12px;margin-top:16px;display:flex}.field-error{color:var(--red);font-size:12px;line-height:1.7}.study-page{max-width:1020px}.study-header{justify-content:space-between;align-items:center;gap:24px;margin-bottom:28px;display:flex}.study-sub{color:var(--muted);font-size:12px;line-height:1.8}.study-actions{flex-wrap:wrap;align-items:center;gap:18px;display:flex}.study-link{color:var(--blue);cursor:pointer;background:0 0;border:0;align-items:center;gap:7px;padding:8px 0;font-size:13px;display:inline-flex}.study-link:disabled{opacity:.5;cursor:not-allowed}.study-reading-body{border:1px solid var(--line);-webkit-user-select:text;user-select:text;background:#fff;border-radius:12px;padding:clamp(22px,4vw,44px);font-size:15px;line-height:1.85}.study-reading-body p{margin:7px 0 12px}.study-reading-body h2{margin:28px 0 15px;font-size:18px}.study-reading-body h3{line-height:1.7}.study-reading-body .study-english{color:var(--muted);font-size:13px;line-height:1.8}.study-quick-goal{border-bottom:1px solid var(--line);padding-bottom:17px;font-size:17px}.study-points{margin:25px 0;padding-left:24px}.study-points>li{margin-bottom:17px;padding-left:10px}.study-points>li::marker{color:var(--blue);font-weight:550}.study-terms{flex-wrap:wrap;gap:10px;margin-bottom:25px;display:flex}.study-terms>span{background:var(--surface-soft);color:var(--muted);border-radius:6px;padding:8px 12px;font-size:13px}.study-terms strong{color:var(--text);font-weight:550}.study-background{border-top:1px solid var(--line);margin-top:28px;padding-top:15px;font-size:14px}.study-background summary,.study-personal summary,.study-reading-body>details>summary{color:var(--muted);cursor:pointer;font-size:13px}.study-reading-body pre{white-space:pre-wrap;overflow-wrap:anywhere;background:var(--surface-soft);border-radius:8px;padding:18px;font-size:13px;line-height:1.8}.study-reading-body dl>div{gap:16px;margin-bottom:8px;display:flex}.study-reading-body dt{min-width:35px;font-family:ui-monospace,monospace}.study-reading-body dd{margin:0;font-size:13px}.study-sources{color:var(--muted);margin-top:24px;font-size:12px}.study-sources summary{cursor:pointer;padding:10px 0}.study-sources summary>svg{vertical-align:middle;margin-right:6px}.study-sources summary>span{color:var(--blue);margin-left:10px}.study-reference{color:var(--blue);cursor:pointer;text-align:left;background:0 0;border:0;margin:7px 14px 7px 0;padding:0;font-size:12px;line-height:1.7;display:inline-flex}.study-footer{border-top:1px solid var(--line);justify-content:space-between;align-items:center;gap:20px;margin-top:25px;padding-top:18px;display:flex}.study-footer>span{color:var(--muted);font-size:11px}.study-empty{background:var(--surface);border:1px solid var(--line);color:var(--muted);border-radius:12px;padding:32px;font-size:14px;line-height:1.9}.study-notice,.study-error{border-radius:8px;padding:14px 16px;font-size:13px;line-height:1.8}.study-notice{color:#536c90;background:var(--blue-soft)}.study-error{color:var(--red);background:#fff4f4}.study-personal{margin-top:20px;padding:18px 0;font-size:14px;line-height:1.8}.study-personal p{white-space:pre-wrap}.study-editor{resize:vertical;border:1px solid var(--line);width:100%;min-height:170px;color:var(--text);background:#fff;border-radius:8px;margin:12px 0;padding:16px;line-height:1.8}.study-source-tag{color:var(--muted);border-bottom:1px solid var(--line);padding-bottom:15px;font-size:12px}.study-evidence summary{cursor:pointer;color:var(--muted);font-size:11px}.study-note-section{border-bottom:1px solid var(--line);padding-bottom:16px}.study-note-section:last-child{border-bottom:0}.study-note-topic h3>small{color:var(--muted);margin-left:8px;font-size:12px;font-weight:400}.study-notes-body .notes-bilingual-block,.study-notes-body .notes-text-item{box-shadow:none;background:0 0;border:0;padding:0}.study-notes-body .notes-inline-card{background:var(--surface-soft);border-radius:8px}.study-source-dialog{background:#fff;border-radius:12px;width:min(920px,94vw);height:90dvh;padding:20px}.study-source-dialog>header{justify-content:space-between;gap:15px;display:flex}.study-source-dialog iframe{border:0;width:100%;height:calc(100% - 80px);margin-top:20px}@media (max-width:760px){.sidebar{border-right:0;border-bottom:1px solid var(--line)}.sidebar nav{grid-template-columns:repeat(3,minmax(0,1fr))}.nav-item{padding:10px 8px;font-size:12px}.nav-label{gap:6px}.nav-beta-label{display:none}.workspace-hero{align-items:flex-start;gap:18px}.workspace-hero .header-actions{width:auto}.workspace-hero .large{min-height:43px;padding:0 15px;font-size:13px}.class-material-workspace{padding:19px}.study-tools{gap:10px}.study-tool{align-items:flex-start;gap:11px;padding:20px 8px}.study-tool>svg{display:none}.textbook-library{padding:18px}.textbook-library .workspace-section-heading{align-items:flex-start}.workspace-heading-copy{gap:8px}.textbook-library .workspace-heading-copy>svg{display:none}.textbook-library .workspace-section-heading>button{white-space:nowrap;padding:0 10px;font-size:12px}.workspace-dialog{padding:19px}.workspace-dialog-footer{flex-direction:column;align-items:flex-start}.workspace-dialog-footer>span{max-width:none}.workspace-dialog-footer>div{justify-content:flex-end;width:100%}.pdf-range-preview{gap:12px;padding:12px}.study-header{flex-wrap:wrap;gap:18px}.study-header .study-actions{gap:18px}.study-footer{align-items:flex-start}}@media (max-width:460px){.workspace-hero{flex-direction:column}.workspace-hero .header-actions{align-self:flex-end}.class-material-empty{padding:20px 0}.class-material-empty>.workspace-file-icon{display:none}.workspace-file-list>li{gap:10px}.workspace-file-icon{width:34px;height:42px}.study-tools{grid-template-columns:1fr;gap:0}.study-tool{padding:20px 4px}.study-tool+.study-tool{border-top:1px solid var(--line);border-radius:0}.study-tool>svg{display:block}.pdf-range-fields{grid-template-columns:minmax(70px,1fr) auto minmax(70px,1fr)}.pdf-range-fields>strong{grid-column:1/-1;margin:-8px 0 0}.pdf-page-controls{gap:0;font-size:11px}.pdf-reader-toolbar .button{padding:0 10px;font-size:12px}.workspace-tabs{gap:18px}.workspace-tabs button{font-size:12px}}
:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}:root[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--background:#111827;--surface:#1a2332;--surface-soft:#212d3f;--text:#e6edf7;--muted:#aab7c9;--line:#344257;--blue:#8ebaff;--blue-dark:#acccff;--blue-soft:#213653;--green:#73d8b0;--red:#ffa2aa;--shadow:0 8px 24px #00000026}.sidebar{overflow-y:auto}.theme-corner{top:max(8px, env(safe-area-inset-top));right:max(10px, env(safe-area-inset-right));z-index:25;position:fixed}.theme-toggle{width:44px;height:44px;color:var(--muted);cursor:pointer;background:0 0;border:0;border-radius:50%;place-items:center;padding:0;display:grid;position:relative}.theme-toggle:before{content:"";border:1px solid var(--line);background:var(--surface);pointer-events:none;border-radius:50%;position:absolute;inset:7px}.theme-toggle:hover{color:var(--blue)}.theme-toggle:hover:before{background:var(--blue-soft)}.theme-toggle:focus-visible{outline-offset:0}.theme-toggle svg{pointer-events:none;position:relative}@media (min-width:761px){.live-shell .live-header,.meeting-live-header{padding-right:44px}}.auth-page{padding-top:82px}.storage-page{max-width:1000px}.storage-page .storage-status{margin:0 0 24px}.storage-page .storage-details,.storage-backups{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);padding:24px}.storage-details{color:var(--muted);font-size:14px;line-height:1.8}.storage-details summary{color:var(--text);font-weight:600}.storage-page .storage-details .header-actions{justify-content:flex-start;margin-top:18px}.storage-alert-link{color:var(--blue);margin:0 0 12px;font-size:13px;text-decoration:underline;display:inline-block}.storage-backups h2{font-size:18px}.storage-backups>p{color:var(--muted);font-size:14px;line-height:1.7}.storage-backups ul{margin:18px 0;padding:0;list-style:none}.storage-backups li{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:20px;padding:16px 0;display:flex}.storage-backups li>span{overflow-wrap:anywhere;min-width:0}.storage-page-links{flex-wrap:wrap;gap:24px;margin-top:18px;display:flex}:root[data-theme=dark] :is(.auth-panel,.button.secondary,.small-action,.modal,.beta-access-panel,.admin-invite-create,.invite-history,.generated-invites pre,.class-list,.workspace-panel,.choice-dialog,.backup-dialog,.listening-status,.transcript-stage,.live-controls,.toggle-control,.transcript-metadata,.transcript-document,.notes-toc,.notes-document,.comparison-columns>div,.return-to-live,.workspace-menu-content,.study-reading-body,.study-editor,.study-source-dialog,.meeting-preview-modal,.audio-source-tag){background:var(--surface);color:var(--text)}:root[data-theme=dark] :is(input:not([type=checkbox]):not([type=radio]),select,textarea){color:var(--text);border-color:var(--line);background:var(--surface)}:root[data-theme=dark] :is(input,select,textarea)::placeholder{color:var(--muted);opacity:1}:root[data-theme=dark] :is(input,select,textarea):focus-visible{outline-color:var(--blue)}:root[data-theme=dark] :is(.button.primary,.enhancement-switch:checked){background:#2864ce}:root[data-theme=dark] .button.primary:hover:not(:disabled){background:#3475e1}:root[data-theme=dark] .enhancement-switch{background:#53647c}:root[data-theme=dark] .enhancement-switch:before{background:#fff}:root[data-theme=dark] :is(.empty-panel,.reading-empty,.material-list li,.term-item,.formula-item,.code-highlight,.notes-item,.notes-formula,.notes-code,.comparison-table,.raw-transcript,.reflow-debug,.icon-button,.audio-source-option:disabled,.invite-status,.analysis-pill,.audio-meter){background:var(--surface-soft);border-color:var(--line)}:root[data-theme=dark] :is(.class-row:hover,.small-action:hover,.icon-button:hover,.generated-invites,.partial-stage,.enhancement-control,.recovery-panel,.professor-note,.comparison-difference,.formula-expression,.formula-item>code){background:var(--blue-soft);border-color:var(--line)}:root[data-theme=dark] .live-controls .enhancement-control{background:0 0}:root[data-theme=dark] :is(label,.semantic-transcript-block p,.transcript-document-row>div>p,.record-summary dd,.transcript-metadata strong,.notes-section>h2,.bilingual-copy p[lang=en],.notes-bilingual-copy p[lang=en],.term-item strong,.notes-item h3,.notes-formula h3,.comparison-table h3,.enhancement-control label){color:var(--text)}:root[data-theme=dark] :is(.tag-chip,.small-action,.icon-button,.breadcrumbs,.preview-section ul,.preview-section p,.bilingual-copy p[lang=zh-Hans],.bilingual-list li,.formula-item dd,.notes-formula dd,.syntax-note>strong,.reflow-debug dd,.notes-bilingual-copy p[lang=zh-Hans],.notes-toc a,.notes-item h3 small,.notes-formula h3 small,.comparison-table h3 small,.backup-feedback,.backup-dialog p,.recovery-panel p,.semantic-transcript-block.settling p,:where(.semantic-transcript-block p.transcript-translation,.transcript-document-row p.transcript-translation),.raw-transcript p,.return-to-live span,.invite-status,.analysis-pill,.admin-invite-create input:disabled){color:var(--muted)}:root[data-theme=dark] :is(.sidebar-note,.arrow,.class-number,.required,.optional,.term-item small,.code-language,.preview-section .muted,.transcript-section-label,.transcript-line time,.transcript-line small,.semantic-transcript-block time,.semantic-transcript-block small,.pending-transcript-row time,.pending-transcript-row p,.transcript-placeholder,.partial-text.waiting,.reflow-debug,.reflow-debug dt,.notes-toc small,.transcript-document-row time,.raw-transcript summary,.notes-item>small,.notes-formula>small,.translation-unavailable,.invite-table-wrap th,.enhancement-control small,.workspace-file-icon,.study-tool>svg,:where(.meeting-turn.pending .meeting-turn-bubble)){color:#96a5ba}:root[data-theme=dark] :is(.partial-text,.quick-preview p,.formula-item>code,.formula-item dt,.formula-expression,.notes-formula dt,.professor-note>strong,.comparison-difference>strong,.study-notice,.translation-unavailable button,.return-to-live){color:var(--blue)}:root[data-theme=dark] :is(.entity-actions,.course-card:hover,.small-action:hover,.material-list li,.term-item,.formula-item,.code-highlight,.formula-item dl>div,.syntax-note,.transcript-line,.semantic-transcript-block+.semantic-transcript-block,.pending-transcript-row,.partial-stage,.transcript-document-row,.notes-item,.notes-formula,.notes-code,.comparison-table,.material-dropzone,.return-to-live,.empty-panel,.reading-empty,.reflow-debug){border-color:var(--line)}:root[data-theme=dark] :is(.modal-backdrop,.choice-overlay),:root[data-theme=dark] :is(.workspace-dialog,.audio-source-dialog)::backdrop{background:#030812ad}:root[data-theme=dark] .spinner{border-color:var(--line);border-top-color:var(--blue)}:root[data-theme=dark] :is(.error-banner,.study-error,.button.danger-button,.invite-status.revoked,:where(.icon-button.danger:hover,.small-action.danger:hover),.material-icon,.empty-file-icon){color:var(--red);background:#402730;border-color:#78434f}:root[data-theme=dark] .notice-banner{color:#f2d48a;background:#382f20;border-color:#72603a}:root[data-theme=dark] .warning-label{color:#f2d48a;background:#382f20}:root[data-theme=dark] :is(.invite-status.active,.analysis-pill.completed,.success-label,.coverage-badge){color:var(--green);background:#1c3933}:root[data-theme=dark] .error-text{color:var(--red)}:root[data-theme=dark] .material-icon.word{color:var(--blue);background:var(--blue-soft)}:root[data-theme=dark] .material-icon.image{color:#d7b2f6;background:#342c45}:root[data-theme=dark] .workspace-file-icon.textbook{color:var(--blue)}@media (max-width:760px){.sidebar{padding-right:64px;overflow:visible}.sidebar nav{grid-template-columns:repeat(2,minmax(0,1fr))}.storage-backups li{flex-direction:column;align-items:flex-start;gap:12px}.storage-page .storage-details,.storage-backups{padding:20px}}
.live-page{--live-reading-font:-apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", sans-serif}.live-shell .live-page .live-header h1{letter-spacing:-.025em;font-weight:600}.live-page .live-header .back-link{margin-bottom:14px}.live-page .listening-status{letter-spacing:0;font-weight:500}.live-page .transcript-stage{box-shadow:none;border-radius:16px}.live-page .semantic-history{padding:14px 28px 6px}.live-page .semantic-transcript-block,.live-page .pending-transcript-row{border:0;grid-template-columns:minmax(0,1fr);gap:8px;min-width:0;padding:22px 0 10px}.live-page .semantic-transcript-block+.semantic-transcript-block{border-top:0}.live-page .semantic-transcript-block time,.live-page .pending-transcript-row time{color:var(--muted);font-variant-numeric:tabular-nums;padding-top:0;font-size:11px}.live-page .transcript-bilingual-pair{min-width:0}.live-page .transcript-bilingual-pair>*{overflow-wrap:anywhere}:root .live-page .semantic-transcript-block p,:root .live-page .pending-transcript-row p{font-family:var(--live-reading-font);letter-spacing:0;color:var(--text);font-size:clamp(18px,1.6vw,20px);font-weight:400;line-height:1.8}:root .live-page .semantic-transcript-block p.transcript-translation,:root .live-page .pending-transcript-row p.transcript-translation{color:var(--muted);font-size:clamp(17px,1.5vw,19px);line-height:1.9}:root .live-page .pending-transcript-row p[lang=en],:root .live-page .semantic-transcript-block.settling p{color:var(--muted)}.live-page .pending-transcript-stage{padding:12px 28px 22px}.live-page .pending-transcript-row{padding:10px 0}.live-page .transcript-section-label{letter-spacing:.035em;font-weight:500}.live-page .pending-transcript-toggle{min-height:40px;margin-bottom:0}.live-page .transcript-window .partial-stage{border-top:0;padding:18px max(28px,50% - 442px) 22px}:root .live-page .partial-text{font-family:var(--live-reading-font);color:var(--blue);font-size:clamp(18px,1.6vw,20px);font-weight:400;line-height:1.8}:root .live-page .partial-text.waiting{color:var(--muted);font-size:14px}:root .live-shell .live-page .live-controls{min-height:80px;padding:14px 2px max(14px, env(safe-area-inset-bottom));background:var(--background);box-shadow:none;border:0;border-radius:0;margin-top:0}.live-page .live-control-status{overflow-wrap:anywhere;min-width:0}.live-page .live-control-status strong{font-weight:500}.live-page .live-caption-settings{gap:12px 20px}.live-page .live-controls .enhancement-control{gap:8px;min-height:44px}.live-page .live-controls .enhancement-control label{align-items:center;min-height:44px;font-weight:500;display:flex}.live-page .live-controls .enhancement-control small{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;margin:-1px;padding:0;display:block;position:absolute;overflow:hidden}.live-page .live-controls .enhancement-switch{flex-basis:32px;width:32px;height:19px;padding:2px}.live-page .live-controls .enhancement-switch:before{width:15px;height:15px}.live-page .live-controls .enhancement-switch:checked:before{transform:translate(13px)}.live-page .live-controls .live-primary-action{border-radius:9px;min-width:108px;min-height:44px;font-weight:600}:root .live-page .live-controls .stop-button{color:var(--red);background:color-mix(in srgb, var(--red) 10%, var(--surface))}:root .live-page .live-controls .stop-button:hover:not(:disabled){background:color-mix(in srgb, var(--red) 18%, var(--surface))}@media (max-width:760px){.live-page .semantic-history{padding:8px 18px 6px}.live-page .pending-transcript-stage{padding:10px 18px 18px}.live-page .transcript-window .partial-stage{padding:16px 18px 20px}:root .live-page .semantic-transcript-block p,:root .live-page .pending-transcript-row p,:root .live-page .partial-text{font-size:16px}:root .live-page .semantic-transcript-block p.transcript-translation,:root .live-page .pending-transcript-row p.transcript-translation{font-size:15px}.live-page .live-caption-settings{gap:0 14px}.live-page .live-controls .enhancement-control label{font-size:11px}}@media (max-width:480px){:root .live-shell .live-page .live-controls{gap:4px 12px}.live-page .live-controls .live-control-status{grid-area:1/1}.live-page .live-controls .live-primary-action{grid-area:1/2;min-width:94px}.live-page .live-controls .live-caption-settings{grid-area:2/1/auto/-1;justify-content:space-between}}
@media (max-width:760px),(max-width:1023px) and (pointer:coarse){html{-webkit-text-size-adjust:100%}body{min-width:0}input,select,textarea{font-size:16px}.app-shell .sidebar{width:100%;height:auto;min-height:0;padding:max(6px, env(safe-area-inset-top)) max(12px, env(safe-area-inset-right)) 0 max(12px, env(safe-area-inset-left));border-right:0;border-bottom:1px solid var(--line);flex-wrap:wrap;align-items:center;gap:4px 12px;display:flex;position:static;overflow:visible}.app-shell .sidebar .brand{flex:1;gap:8px;min-width:0;height:44px;margin:0}.app-shell .sidebar .brand-mark{border-radius:10px;flex:none;width:30px;height:30px}.app-shell .sidebar .brand strong{font-size:15px}.app-shell .sidebar .brand small,.app-shell .sidebar-note{display:none}.app-shell .sidebar nav{scrollbar-width:thin;overscroll-behavior-x:contain;scroll-snap-type:x proximity;flex-wrap:nowrap;flex:0 0 100%;order:3;gap:8px;width:100%;min-width:0;margin:0;padding:2px 0 6px;display:flex;overflow-x:auto}.app-shell .sidebar nav .nav-item{white-space:nowrap;scroll-snap-align:start;border-radius:12px;flex:none;width:auto;min-height:44px;padding:9px 12px;font-size:13px}.app-shell .sidebar nav a[href=\/courses],.app-shell .sidebar nav a[href=\/meetings],.app-shell .nav-count,.app-shell .nav-beta-label,.storage-page-links{display:none}.app-shell .sidebar .nav-label{gap:7px}.app-shell .account-control{flex:none;width:auto;margin:0 44px 0 0}.app-shell .account-control .button{background:0 0;border:0;width:auto;min-height:44px;padding:8px;font-size:12px}.app-shell .account-logout-hint{max-width:240px;left:auto;right:0}.theme-corner{top:max(6px, env(safe-area-inset-top));right:max(10px, env(safe-area-inset-right))}.app-shell .main-content{min-width:0;margin-left:0}.app-shell .page-container{width:calc(100% - 24px);padding:24px 0 max(24px, env(safe-area-inset-bottom))}.quick-shell{flex-direction:column;height:100dvh;display:flex;overflow:hidden}.quick-shell .sidebar{flex:none}.quick-shell .main-content{flex:1;height:auto;min-height:0}.quick-shell .quick-page{width:100%;max-width:none;min-height:0;padding:0 max(12px, env(safe-area-inset-right)) 0 max(12px, env(safe-area-inset-left));flex-direction:column;flex:1;margin:0;display:flex;position:relative}.quick-shell .quick-heading{flex:none;gap:12px;margin:0;padding:10px 0}.quick-shell .quick-heading h1{margin:0;font-size:20px}.quick-shell .quick-heading .eyebrow{letter-spacing:.04em;margin:0 0 2px;font-size:12px}.quick-shell .quick-reader-frame{border-radius:18px}.quick-shell .quick-reader{overscroll-behavior-y:contain;overflow-anchor:none;border-radius:0;flex:1;min-width:0;height:auto;min-height:0;overflow-x:hidden}.quick-shell .quick-empty{min-height:0;padding:20px}.quick-shell .quick-empty h2{font-size:21px}.quick-shell .quick-empty p{max-width:240px;font-size:14px;line-height:1.65}.quick-shell .quick-row{margin:0 16px;padding:18px 0}.quick-shell .quick-current{margin:0;padding:18px 16px}.quick-shell .quick-row time,.quick-shell .quick-label{font-size:12px}.quick-shell .quick-pair p{color:var(--text);margin-top:8px;font-size:18px;line-height:1.65}.quick-shell .quick-pair [lang=zh-CN]{color:var(--muted);font-size:17px}.quick-shell .quick-current .quick-pair p{color:var(--blue)}.quick-shell .quick-reader[data-layout=split] .quick-pair{gap:16px}.quick-shell .quick-reader[data-layout=split] .quick-pair p{font-size:16px;line-height:1.6}.quick-shell .quick-controls{padding:10px 0 max(8px, env(safe-area-inset-bottom));background:0 0;border:0;border-radius:0;flex:none;margin:0;display:block}.quick-shell .quick-controls>div:first-child{flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:8px;display:flex}.quick-shell .quick-status-line{gap:8px;font-size:13px}.quick-shell .quick-controls small{margin:0;font-size:12px}.quick-shell .quick-actions{scrollbar-width:thin;overscroll-behavior-x:contain;flex-wrap:nowrap;gap:8px;width:100%;padding:2px 0 4px;display:flex;overflow-x:auto}.quick-shell .quick-actions>*{white-space:nowrap;flex:none;min-height:44px}.quick-shell .quick-actions .button{gap:6px;padding:10px 12px;font-size:14px}.quick-shell .quick-actions select{max-width:118px;padding:8px}.quick-shell .quick-actions .quick-primary{z-index:2;min-width:116px;box-shadow:5px 0 8px var(--background);justify-content:center;position:sticky;left:0}.quick-shell .quick-latest{flex:none;align-self:center;align-items:center;gap:8px;min-height:34px;margin:0;padding:6px 12px;font-size:13px;display:flex}.quick-shell .notice-banner{flex:none;max-height:16dvh;margin:0 0 8px;padding:10px 12px;font-size:13px;line-height:1.6;overflow:auto}.quick-shell .storage-status{max-height:15dvh;margin:6px 12px}.workspace-dialog{width:calc(100% - 24px);max-width:520px;max-height:calc(100dvh - env(safe-area-inset-top) - env(safe-area-inset-bottom) - 24px);overscroll-behavior:contain;padding:18px;overflow-y:auto}.workspace-dialog .quick-export-body{padding:4px 0 0}.workspace-dialog .quick-export-options{flex-wrap:nowrap;gap:8px;overflow-x:auto}.workspace-dialog .button{min-height:44px}.workspace-dialog .icon-button{min-width:44px;min-height:44px}.workspace-dialog select,.workspace-dialog input:not([type=checkbox]){width:100%;min-width:0;min-height:48px;font-size:16px}.workspace-dialog form,.workspace-dialog label{min-width:0}.workspace-dialog .quick-experiment label{align-items:center;min-height:44px}.workspace-dialog .quick-experiment input{width:22px;height:22px}.quick-cloud-transfer{border-top:1px solid var(--line);margin-top:18px}.quick-cloud-transfer .button{white-space:normal}.quick-cloud-transfer a{padding:12px 0;display:block}.auth-page{min-height:100dvh;padding:max(64px, env(safe-area-inset-top)) max(16px, env(safe-area-inset-right)) max(24px, env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left));flex-direction:column;justify-content:flex-start;align-items:center;display:flex}.auth-page .auth-panel{width:100%;max-width:420px;padding:24px 20px}.auth-panel .brand{gap:10px;font-size:16px}.auth-panel h1{font-size:26px}.auth-panel input{min-height:48px;font-size:16px}.auth-panel .button{min-height:48px}.auth-links{flex-wrap:wrap;gap:8px 16px;display:flex}.auth-links a{align-items:center;min-height:44px;display:inline-flex}.auth-panel p{overflow-wrap:anywhere}.auth-panel .form-help{font-size:13px;line-height:1.65}}@media (pointer:coarse){.quick-shell .quick-latest{min-height:44px}}@media (max-height:500px) and (max-width:760px),(max-height:500px) and (max-width:1023px) and (pointer:coarse){.quick-shell .sidebar{position:relative}.quick-shell .sidebar .brand{display:none}.quick-shell .sidebar .account-control{margin:0;position:absolute;top:4px;right:54px}.quick-shell .sidebar nav{padding-right:120px}.quick-shell .quick-heading{padding:4px 0}.quick-shell .quick-heading .eyebrow,.quick-shell .quick-controls small{display:none}.quick-shell .quick-controls{padding-top:4px}}
.theme-corner{align-items:center;gap:4px;display:flex}.language-control{position:relative}.language-menu{border:1px solid var(--line);background:var(--surface);min-width:154px;color:var(--text);border-radius:16px;padding:6px;position:absolute;top:calc(100% + 4px);right:0;box-shadow:0 12px 32px #0002}.language-menu button{width:100%;min-height:44px;color:inherit;font:inherit;cursor:pointer;background:0 0;border:0;border-radius:10px;justify-content:space-between;align-items:center;gap:16px;padding:8px 12px;font-size:14px;display:flex}.language-menu button:hover,.language-menu button:focus-visible{background:var(--blue-soft);color:var(--blue)}.language-menu button[aria-checked=true]{color:var(--blue)}@media (max-width:760px),(max-width:1023px) and (pointer:coarse){.app-shell .account-control{margin-right:92px}}@media (max-height:500px) and (max-width:760px),(max-height:500px) and (max-width:1023px) and (pointer:coarse){.quick-shell .sidebar .account-control{margin:0;right:102px}.quick-shell .sidebar nav{padding-right:168px}}
@font-face{font-display:block;font-family:KaTeX_AMS;font-style:normal;font-weight:400;src:url(../media/KaTeX_AMS-Regular.3dqqgop8d9q74.woff2)format("woff2"),url(../media/KaTeX_AMS-Regular.3s3485bbs_y9t.woff)format("woff"),url(../media/KaTeX_AMS-Regular.06540o8ttgt08.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:700;src:url(../media/KaTeX_Caligraphic-Bold.0x398dszol8ix.woff2)format("woff2"),url(../media/KaTeX_Caligraphic-Bold.0i0ys3pk95qm_.woff)format("woff"),url(../media/KaTeX_Caligraphic-Bold.071y7fj7dknco.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:400;src:url(../media/KaTeX_Caligraphic-Regular.3ittfn7d21b9w.woff2)format("woff2"),url(../media/KaTeX_Caligraphic-Regular.3-a7ahrnv-1p0.woff)format("woff"),url(../media/KaTeX_Caligraphic-Regular.2a29kziuqmcwj.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:700;src:url(../media/KaTeX_Fraktur-Bold.3rq09ohrtely_.woff2)format("woff2"),url(../media/KaTeX_Fraktur-Bold.1m6-2-v71aefh.woff)format("woff"),url(../media/KaTeX_Fraktur-Bold.2c272neyw5p5h.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:400;src:url(../media/KaTeX_Fraktur-Regular.1jvgec053-2og.woff2)format("woff2"),url(../media/KaTeX_Fraktur-Regular.1pa447q_ni5m2.woff)format("woff"),url(../media/KaTeX_Fraktur-Regular.0_16ta522mcvb.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:700;src:url(../media/KaTeX_Main-Bold.22wkahef0u3fd.woff2)format("woff2"),url(../media/KaTeX_Main-Bold.1fyzqvxw_mkks.woff)format("woff"),url(../media/KaTeX_Main-Bold.3q46h05c4j0cw.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:700;src:url(../media/KaTeX_Main-BoldItalic.40drhxm0mwrzz.woff2)format("woff2"),url(../media/KaTeX_Main-BoldItalic.0g_mm5w89az4z.woff)format("woff"),url(../media/KaTeX_Main-BoldItalic.2r19jqj9qb5v7.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:400;src:url(../media/KaTeX_Main-Italic.1ck6crdmp78cu.woff2)format("woff2"),url(../media/KaTeX_Main-Italic.3h-lyz6-tj-5j.woff)format("woff"),url(../media/KaTeX_Main-Italic.07vrczmwpvimc.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:400;src:url(../media/KaTeX_Main-Regular.29zz7337tzymc.woff2)format("woff2"),url(../media/KaTeX_Main-Regular.0r86ux5c2_9jc.woff)format("woff"),url(../media/KaTeX_Main-Regular.0cm4nk2aib81i.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:700;src:url(../media/KaTeX_Math-BoldItalic.0u_6s571--hh0.woff2)format("woff2"),url(../media/KaTeX_Math-BoldItalic.1-f92ydojzao_.woff)format("woff"),url(../media/KaTeX_Math-BoldItalic.0m2qm2_orz99k.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:400;src:url(../media/KaTeX_Math-Italic.18dmviy-uianu.woff2)format("woff2"),url(../media/KaTeX_Math-Italic.2d-roszuwfrpn.woff)format("woff"),url(../media/KaTeX_Math-Italic.1vw7gcigzv33_.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:700;src:url(../media/KaTeX_SansSerif-Bold.19n5ohjzvq40z.woff2)format("woff2"),url(../media/KaTeX_SansSerif-Bold.1ad0dh55v7-4h.woff)format("woff"),url(../media/KaTeX_SansSerif-Bold.3ojskmd7zv_b8.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:italic;font-weight:400;src:url(../media/KaTeX_SansSerif-Italic.38w085lqrghwm.woff2)format("woff2"),url(../media/KaTeX_SansSerif-Italic.0_21g6aey40vy.woff)format("woff"),url(../media/KaTeX_SansSerif-Italic.0abd80e_ako5h.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:400;src:url(../media/KaTeX_SansSerif-Regular.3w8wtfek3qsk6.woff2)format("woff2"),url(../media/KaTeX_SansSerif-Regular.0v2olaztuqa1v.woff)format("woff"),url(../media/KaTeX_SansSerif-Regular.0xkeldfcfvj58.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Script;font-style:normal;font-weight:400;src:url(../media/KaTeX_Script-Regular.10h737unm2jp7.woff2)format("woff2"),url(../media/KaTeX_Script-Regular.2m7-0wua2lvnq.woff)format("woff"),url(../media/KaTeX_Script-Regular.1hw1d7omwtnoy.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size1;font-style:normal;font-weight:400;src:url(../media/KaTeX_Size1-Regular.3xype_vsmmjgw.woff2)format("woff2"),url(../media/KaTeX_Size1-Regular.3aliq3yd-ja9b.woff)format("woff"),url(../media/KaTeX_Size1-Regular.44z_qgcc9t0a_.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size2;font-style:normal;font-weight:400;src:url(../media/KaTeX_Size2-Regular.2-wakugslvf3a.woff2)format("woff2"),url(../media/KaTeX_Size2-Regular.3u0df62zf5guy.woff)format("woff"),url(../media/KaTeX_Size2-Regular.3eprswoc9v3fh.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size3;font-style:normal;font-weight:400;src:url(../media/KaTeX_Size3-Regular.1nfuh3l6nzhjv.woff2)format("woff2"),url(../media/KaTeX_Size3-Regular.3n7wm08wz2r2g.woff)format("woff"),url(../media/KaTeX_Size3-Regular.2kp2izz6g7r-7.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size4;font-style:normal;font-weight:400;src:url(../media/KaTeX_Size4-Regular.13pyt7zi482pb.woff2)format("woff2"),url(../media/KaTeX_Size4-Regular.37jvrh2wknf5u.woff)format("woff"),url(../media/KaTeX_Size4-Regular.2ltjhs9xhaefy.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Typewriter;font-style:normal;font-weight:400;src:url(../media/KaTeX_Typewriter-Regular.2vfnlegjq9l42.woff2)format("woff2"),url(../media/KaTeX_Typewriter-Regular.0xi5kyeeydv4z.woff)format("woff"),url(../media/KaTeX_Typewriter-Regular.34aedpl-_o3h3.ttf)format("truetype")}.katex{text-indent:0;text-rendering:auto;font:1.21em/1.2 KaTeX_Main,Times New Roman,serif;position:relative}.katex *{border-color:currentColor;-ms-high-contrast-adjust:none!important}.katex .katex-version:after{content:"0.18.7"}.katex .katex-mathml{clip-path:inset(50%);border:0;width:1px;height:1px;padding:0;position:absolute;overflow:hidden}.katex .katex-html>.katex-newline{display:block}.katex .katex-base{white-space:nowrap;width:min-content;position:relative}.katex .katex-base,.katex .katex-strut{display:inline-block}.katex .textbf{font-weight:700}.katex .textit{font-style:italic}.katex .textrm{font-family:KaTeX_Main}.katex .textsf{font-family:KaTeX_SansSerif}.katex .texttt{font-family:KaTeX_Typewriter}.katex .mathnormal{font-family:KaTeX_Math;font-style:italic}.katex .mathit{font-family:KaTeX_Main;font-style:italic}.katex .mathrm{font-style:normal}.katex .mathbf{font-family:KaTeX_Main;font-weight:700}.katex .boldsymbol{font-family:KaTeX_Math;font-style:italic;font-weight:700}.katex .amsrm,.katex .mathbb,.katex .textbb{font-family:KaTeX_AMS}.katex .mathcal{font-family:KaTeX_Caligraphic}.katex .mathfrak,.katex .textfrak{font-family:KaTeX_Fraktur}.katex .mathboldfrak,.katex .textboldfrak{font-family:KaTeX_Fraktur;font-weight:700}.katex .mathtt{font-family:KaTeX_Typewriter}.katex .mathscr,.katex .textscr{font-family:KaTeX_Script}.katex .mathsf,.katex .textsf{font-family:KaTeX_SansSerif}.katex .mathboldsf,.katex .textboldsf{font-family:KaTeX_SansSerif;font-weight:700}.katex .mathitsf,.katex .mathsfit,.katex .textitsf{font-family:KaTeX_SansSerif;font-style:italic}.katex .mainrm{font-family:KaTeX_Main;font-style:normal}.katex .vlist-t{border-collapse:collapse;table-layout:fixed;display:inline-table}.katex .vlist-r{display:table-row}.katex .vlist{vertical-align:bottom;display:table-cell;position:relative}.katex .vlist>span{height:0;display:block;position:relative}.katex .vlist>span>span{display:inline-block}.katex .vlist>span>.pstrut{width:0;overflow:hidden}.katex .vlist-t2{margin-right:-2px}.katex .vlist-s{vertical-align:bottom;width:2px;min-width:2px;font-size:1px;display:table-cell}.katex .katex-vbox{flex-direction:column;align-items:baseline;display:inline-flex}.katex .katex-thinbox{flex-direction:row;width:0;max-width:0;display:inline-flex}.katex .msupsub{text-align:left}.katex .mfrac>span>span{text-align:center}.katex .mfrac .frac-line{border-bottom-style:solid;width:100%;display:inline-block}.katex .katex-hdashline,.katex .katex-hline,.katex .katex-overline .overline-line,.katex .katex-rule,.katex .katex-underline .underline-line,.katex .mfrac .frac-line{min-height:1px}.katex .mspace{display:inline-block}.katex .katex-smash{line-height:0;display:inline}.katex .clap,.katex .llap,.katex .rlap{width:0;position:relative}.katex .clap>.katex-inner,.katex .llap>.katex-inner,.katex .rlap>.katex-inner{position:absolute}.katex .clap>.katex-fix,.katex .llap>.katex-fix,.katex .rlap>.katex-fix{display:inline-block}.katex .llap>.katex-inner{right:0}.katex .clap>.katex-inner,.katex .rlap>.katex-inner{left:0}.katex .clap>.katex-inner>span{margin-left:-50%;margin-right:50%}.katex .katex-rule{border:0 solid;display:inline-block;position:relative}.katex .katex-hline,.katex .katex-overline .overline-line,.katex .katex-underline .underline-line{border-bottom-style:solid;width:100%;display:inline-block}.katex .katex-hdashline{border-bottom-style:dashed;width:100%;display:inline-block}.katex .sqrt>.katex-root{margin-left:.277778em;margin-right:-.555556em}.katex .fontsize-ensurer.reset-size1.size1,.katex .katex-sizing.reset-size1.size1{font-size:1em}.katex .fontsize-ensurer.reset-size1.size2,.katex .katex-sizing.reset-size1.size2{font-size:1.2em}.katex .fontsize-ensurer.reset-size1.size3,.katex .katex-sizing.reset-size1.size3{font-size:1.4em}.katex .fontsize-ensurer.reset-size1.size4,.katex .katex-sizing.reset-size1.size4{font-size:1.6em}.katex .fontsize-ensurer.reset-size1.size5,.katex .katex-sizing.reset-size1.size5{font-size:1.8em}.katex .fontsize-ensurer.reset-size1.size6,.katex .katex-sizing.reset-size1.size6{font-size:2em}.katex .fontsize-ensurer.reset-size1.size7,.katex .katex-sizing.reset-size1.size7{font-size:2.4em}.katex .fontsize-ensurer.reset-size1.size8,.katex .katex-sizing.reset-size1.size8{font-size:2.88em}.katex .fontsize-ensurer.reset-size1.size9,.katex .katex-sizing.reset-size1.size9{font-size:3.456em}.katex .fontsize-ensurer.reset-size1.size10,.katex .katex-sizing.reset-size1.size10{font-size:4.148em}.katex .fontsize-ensurer.reset-size1.size11,.katex .katex-sizing.reset-size1.size11{font-size:4.976em}.katex .fontsize-ensurer.reset-size2.size1,.katex .katex-sizing.reset-size2.size1{font-size:.833333em}.katex .fontsize-ensurer.reset-size2.size2,.katex .katex-sizing.reset-size2.size2{font-size:1em}.katex .fontsize-ensurer.reset-size2.size3,.katex .katex-sizing.reset-size2.size3{font-size:1.16667em}.katex .fontsize-ensurer.reset-size2.size4,.katex .katex-sizing.reset-size2.size4{font-size:1.33333em}.katex .fontsize-ensurer.reset-size2.size5,.katex .katex-sizing.reset-size2.size5{font-size:1.5em}.katex .fontsize-ensurer.reset-size2.size6,.katex .katex-sizing.reset-size2.size6{font-size:1.66667em}.katex .fontsize-ensurer.reset-size2.size7,.katex .katex-sizing.reset-size2.size7{font-size:2em}.katex .fontsize-ensurer.reset-size2.size8,.katex .katex-sizing.reset-size2.size8{font-size:2.4em}.katex .fontsize-ensurer.reset-size2.size9,.katex .katex-sizing.reset-size2.size9{font-size:2.88em}.katex .fontsize-ensurer.reset-size2.size10,.katex .katex-sizing.reset-size2.size10{font-size:3.45667em}.katex .fontsize-ensurer.reset-size2.size11,.katex .katex-sizing.reset-size2.size11{font-size:4.14667em}.katex .fontsize-ensurer.reset-size3.size1,.katex .katex-sizing.reset-size3.size1{font-size:.714286em}.katex .fontsize-ensurer.reset-size3.size2,.katex .katex-sizing.reset-size3.size2{font-size:.857143em}.katex .fontsize-ensurer.reset-size3.size3,.katex .katex-sizing.reset-size3.size3{font-size:1em}.katex .fontsize-ensurer.reset-size3.size4,.katex .katex-sizing.reset-size3.size4{font-size:1.14286em}.katex .fontsize-ensurer.reset-size3.size5,.katex .katex-sizing.reset-size3.size5{font-size:1.28571em}.katex .fontsize-ensurer.reset-size3.size6,.katex .katex-sizing.reset-size3.size6{font-size:1.42857em}.katex .fontsize-ensurer.reset-size3.size7,.katex .katex-sizing.reset-size3.size7{font-size:1.71429em}.katex .fontsize-ensurer.reset-size3.size8,.katex .katex-sizing.reset-size3.size8{font-size:2.05714em}.katex .fontsize-ensurer.reset-size3.size9,.katex .katex-sizing.reset-size3.size9{font-size:2.46857em}.katex .fontsize-ensurer.reset-size3.size10,.katex .katex-sizing.reset-size3.size10{font-size:2.96286em}.katex .fontsize-ensurer.reset-size3.size11,.katex .katex-sizing.reset-size3.size11{font-size:3.55429em}.katex .fontsize-ensurer.reset-size4.size1,.katex .katex-sizing.reset-size4.size1{font-size:.625em}.katex .fontsize-ensurer.reset-size4.size2,.katex .katex-sizing.reset-size4.size2{font-size:.75em}.katex .fontsize-ensurer.reset-size4.size3,.katex .katex-sizing.reset-size4.size3{font-size:.875em}.katex .fontsize-ensurer.reset-size4.size4,.katex .katex-sizing.reset-size4.size4{font-size:1em}.katex .fontsize-ensurer.reset-size4.size5,.katex .katex-sizing.reset-size4.size5{font-size:1.125em}.katex .fontsize-ensurer.reset-size4.size6,.katex .katex-sizing.reset-size4.size6{font-size:1.25em}.katex .fontsize-ensurer.reset-size4.size7,.katex .katex-sizing.reset-size4.size7{font-size:1.5em}.katex .fontsize-ensurer.reset-size4.size8,.katex .katex-sizing.reset-size4.size8{font-size:1.8em}.katex .fontsize-ensurer.reset-size4.size9,.katex .katex-sizing.reset-size4.size9{font-size:2.16em}.katex .fontsize-ensurer.reset-size4.size10,.katex .katex-sizing.reset-size4.size10{font-size:2.5925em}.katex .fontsize-ensurer.reset-size4.size11,.katex .katex-sizing.reset-size4.size11{font-size:3.11em}.katex .fontsize-ensurer.reset-size5.size1,.katex .katex-sizing.reset-size5.size1{font-size:.555556em}.katex .fontsize-ensurer.reset-size5.size2,.katex .katex-sizing.reset-size5.size2{font-size:.666667em}.katex .fontsize-ensurer.reset-size5.size3,.katex .katex-sizing.reset-size5.size3{font-size:.777778em}.katex .fontsize-ensurer.reset-size5.size4,.katex .katex-sizing.reset-size5.size4{font-size:.888889em}.katex .fontsize-ensurer.reset-size5.size5,.katex .katex-sizing.reset-size5.size5{font-size:1em}.katex .fontsize-ensurer.reset-size5.size6,.katex .katex-sizing.reset-size5.size6{font-size:1.11111em}.katex .fontsize-ensurer.reset-size5.size7,.katex .katex-sizing.reset-size5.size7{font-size:1.33333em}.katex .fontsize-ensurer.reset-size5.size8,.katex .katex-sizing.reset-size5.size8{font-size:1.6em}.katex .fontsize-ensurer.reset-size5.size9,.katex .katex-sizing.reset-size5.size9{font-size:1.92em}.katex .fontsize-ensurer.reset-size5.size10,.katex .katex-sizing.reset-size5.size10{font-size:2.30444em}.katex .fontsize-ensurer.reset-size5.size11,.katex .katex-sizing.reset-size5.size11{font-size:2.76444em}.katex .fontsize-ensurer.reset-size6.size1,.katex .katex-sizing.reset-size6.size1{font-size:.5em}.katex .fontsize-ensurer.reset-size6.size2,.katex .katex-sizing.reset-size6.size2{font-size:.6em}.katex .fontsize-ensurer.reset-size6.size3,.katex .katex-sizing.reset-size6.size3{font-size:.7em}.katex .fontsize-ensurer.reset-size6.size4,.katex .katex-sizing.reset-size6.size4{font-size:.8em}.katex .fontsize-ensurer.reset-size6.size5,.katex .katex-sizing.reset-size6.size5{font-size:.9em}.katex .fontsize-ensurer.reset-size6.size6,.katex .katex-sizing.reset-size6.size6{font-size:1em}.katex .fontsize-ensurer.reset-size6.size7,.katex .katex-sizing.reset-size6.size7{font-size:1.2em}.katex .fontsize-ensurer.reset-size6.size8,.katex .katex-sizing.reset-size6.size8{font-size:1.44em}.katex .fontsize-ensurer.reset-size6.size9,.katex .katex-sizing.reset-size6.size9{font-size:1.728em}.katex .fontsize-ensurer.reset-size6.size10,.katex .katex-sizing.reset-size6.size10{font-size:2.074em}.katex .fontsize-ensurer.reset-size6.size11,.katex .katex-sizing.reset-size6.size11{font-size:2.488em}.katex .fontsize-ensurer.reset-size7.size1,.katex .katex-sizing.reset-size7.size1{font-size:.416667em}.katex .fontsize-ensurer.reset-size7.size2,.katex .katex-sizing.reset-size7.size2{font-size:.5em}.katex .fontsize-ensurer.reset-size7.size3,.katex .katex-sizing.reset-size7.size3{font-size:.583333em}.katex .fontsize-ensurer.reset-size7.size4,.katex .katex-sizing.reset-size7.size4{font-size:.666667em}.katex .fontsize-ensurer.reset-size7.size5,.katex .katex-sizing.reset-size7.size5{font-size:.75em}.katex .fontsize-ensurer.reset-size7.size6,.katex .katex-sizing.reset-size7.size6{font-size:.833333em}.katex .fontsize-ensurer.reset-size7.size7,.katex .katex-sizing.reset-size7.size7{font-size:1em}.katex .fontsize-ensurer.reset-size7.size8,.katex .katex-sizing.reset-size7.size8{font-size:1.2em}.katex .fontsize-ensurer.reset-size7.size9,.katex .katex-sizing.reset-size7.size9{font-size:1.44em}.katex .fontsize-ensurer.reset-size7.size10,.katex .katex-sizing.reset-size7.size10{font-size:1.72833em}.katex .fontsize-ensurer.reset-size7.size11,.katex .katex-sizing.reset-size7.size11{font-size:2.07333em}.katex .fontsize-ensurer.reset-size8.size1,.katex .katex-sizing.reset-size8.size1{font-size:.347222em}.katex .fontsize-ensurer.reset-size8.size2,.katex .katex-sizing.reset-size8.size2{font-size:.416667em}.katex .fontsize-ensurer.reset-size8.size3,.katex .katex-sizing.reset-size8.size3{font-size:.486111em}.katex .fontsize-ensurer.reset-size8.size4,.katex .katex-sizing.reset-size8.size4{font-size:.555556em}.katex .fontsize-ensurer.reset-size8.size5,.katex .katex-sizing.reset-size8.size5{font-size:.625em}.katex .fontsize-ensurer.reset-size8.size6,.katex .katex-sizing.reset-size8.size6{font-size:.694444em}.katex .fontsize-ensurer.reset-size8.size7,.katex .katex-sizing.reset-size8.size7{font-size:.833333em}.katex .fontsize-ensurer.reset-size8.size8,.katex .katex-sizing.reset-size8.size8{font-size:1em}.katex .fontsize-ensurer.reset-size8.size9,.katex .katex-sizing.reset-size8.size9{font-size:1.2em}.katex .fontsize-ensurer.reset-size8.size10,.katex .katex-sizing.reset-size8.size10{font-size:1.44028em}.katex .fontsize-ensurer.reset-size8.size11,.katex .katex-sizing.reset-size8.size11{font-size:1.72778em}.katex .fontsize-ensurer.reset-size9.size1,.katex .katex-sizing.reset-size9.size1{font-size:.289352em}.katex .fontsize-ensurer.reset-size9.size2,.katex .katex-sizing.reset-size9.size2{font-size:.347222em}.katex .fontsize-ensurer.reset-size9.size3,.katex .katex-sizing.reset-size9.size3{font-size:.405093em}.katex .fontsize-ensurer.reset-size9.size4,.katex .katex-sizing.reset-size9.size4{font-size:.462963em}.katex .fontsize-ensurer.reset-size9.size5,.katex .katex-sizing.reset-size9.size5{font-size:.520833em}.katex .fontsize-ensurer.reset-size9.size6,.katex .katex-sizing.reset-size9.size6{font-size:.578704em}.katex .fontsize-ensurer.reset-size9.size7,.katex .katex-sizing.reset-size9.size7{font-size:.694444em}.katex .fontsize-ensurer.reset-size9.size8,.katex .katex-sizing.reset-size9.size8{font-size:.833333em}.katex .fontsize-ensurer.reset-size9.size9,.katex .katex-sizing.reset-size9.size9{font-size:1em}.katex .fontsize-ensurer.reset-size9.size10,.katex .katex-sizing.reset-size9.size10{font-size:1.20023em}.katex .fontsize-ensurer.reset-size9.size11,.katex .katex-sizing.reset-size9.size11{font-size:1.43981em}.katex .fontsize-ensurer.reset-size10.size1,.katex .katex-sizing.reset-size10.size1{font-size:.24108em}.katex .fontsize-ensurer.reset-size10.size2,.katex .katex-sizing.reset-size10.size2{font-size:.289296em}.katex .fontsize-ensurer.reset-size10.size3,.katex .katex-sizing.reset-size10.size3{font-size:.337512em}.katex .fontsize-ensurer.reset-size10.size4,.katex .katex-sizing.reset-size10.size4{font-size:.385728em}.katex .fontsize-ensurer.reset-size10.size5,.katex .katex-sizing.reset-size10.size5{font-size:.433944em}.katex .fontsize-ensurer.reset-size10.size6,.katex .katex-sizing.reset-size10.size6{font-size:.48216em}.katex .fontsize-ensurer.reset-size10.size7,.katex .katex-sizing.reset-size10.size7{font-size:.578592em}.katex .fontsize-ensurer.reset-size10.size8,.katex .katex-sizing.reset-size10.size8{font-size:.694311em}.katex .fontsize-ensurer.reset-size10.size9,.katex .katex-sizing.reset-size10.size9{font-size:.833173em}.katex .fontsize-ensurer.reset-size10.size10,.katex .katex-sizing.reset-size10.size10{font-size:1em}.katex .fontsize-ensurer.reset-size10.size11,.katex .katex-sizing.reset-size10.size11{font-size:1.19961em}.katex .fontsize-ensurer.reset-size11.size1,.katex .katex-sizing.reset-size11.size1{font-size:.200965em}.katex .fontsize-ensurer.reset-size11.size2,.katex .katex-sizing.reset-size11.size2{font-size:.241158em}.katex .fontsize-ensurer.reset-size11.size3,.katex .katex-sizing.reset-size11.size3{font-size:.281351em}.katex .fontsize-ensurer.reset-size11.size4,.katex .katex-sizing.reset-size11.size4{font-size:.321543em}.katex .fontsize-ensurer.reset-size11.size5,.katex .katex-sizing.reset-size11.size5{font-size:.361736em}.katex .fontsize-ensurer.reset-size11.size6,.katex .katex-sizing.reset-size11.size6{font-size:.401929em}.katex .fontsize-ensurer.reset-size11.size7,.katex .katex-sizing.reset-size11.size7{font-size:.482315em}.katex .fontsize-ensurer.reset-size11.size8,.katex .katex-sizing.reset-size11.size8{font-size:.578778em}.katex .fontsize-ensurer.reset-size11.size9,.katex .katex-sizing.reset-size11.size9{font-size:.694534em}.katex .fontsize-ensurer.reset-size11.size10,.katex .katex-sizing.reset-size11.size10{font-size:.833601em}.katex .fontsize-ensurer.reset-size11.size11,.katex .katex-sizing.reset-size11.size11{font-size:1em}.katex .delimsizing.size1{font-family:KaTeX_Size1}.katex .delimsizing.size2{font-family:KaTeX_Size2}.katex .delimsizing.size3{font-family:KaTeX_Size3}.katex .delimsizing.size4{font-family:KaTeX_Size4}.katex .delimsizing.mult .delim-size1>span{font-family:KaTeX_Size1}.katex .delimsizing.mult .delim-size4>span{font-family:KaTeX_Size4}.katex .nulldelimiter{width:.12em;display:inline-block}.katex .delimcenter,.katex .op-symbol{position:relative}.katex .op-symbol.small-op{font-family:KaTeX_Size1}.katex .op-symbol.large-op{font-family:KaTeX_Size2}.katex .katex-accent>.vlist-t,.katex .op-limits>.vlist-t{text-align:center}.katex .katex-accent .accent-body{position:relative}.katex .katex-accent .accent-body:not(.accent-full){width:0}.katex .katex-overlay{display:block}.katex .mtable .vertical-separator{min-width:1px;display:inline-block}.katex .mtable .arraycolsep{display:inline-block}.katex .mtable .col-align-c>.vlist-t{text-align:center}.katex .mtable .col-align-l>.vlist-t{text-align:left}.katex .mtable .col-align-r>.vlist-t{text-align:right}.katex .svg-align{text-align:left}.katex svg{fill:currentColor;stroke:currentColor;height:inherit;width:100%;display:block;position:absolute}.katex svg path{stroke:none}.katex svg{fill-rule:nonzero;fill-opacity:1;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1}.katex img{border-style:none;min-width:0;max-width:none;min-height:0;max-height:none}.katex .katex-stretchy{width:100%;display:block;position:relative;overflow:hidden}.katex .katex-stretchy:after,.katex .katex-stretchy:before{content:""}.katex .hide-tail{width:100%;position:relative;overflow:hidden}.katex .halfarrow-left{width:50.2%;position:absolute;left:0;overflow:hidden}.katex .halfarrow-right{width:50.2%;position:absolute;right:0;overflow:hidden}.katex .brace-left{width:25.1%;position:absolute;left:0;overflow:hidden}.katex .brace-center{width:50%;position:absolute;left:25%;overflow:hidden}.katex .brace-right{width:25.1%;position:absolute;right:0;overflow:hidden}.katex .x-arrow-pad{padding:0 .5em}.katex .cd-arrow-pad{padding:0 .55556em 0 .27778em}.katex .mover,.katex .munder,.katex .x-arrow{text-align:center}.katex .boxpad{padding:0 .3em}.katex .fbox,.katex .fcolorbox{box-sizing:border-box;border:.04em solid}.katex .cancel-pad{padding:0 .2em}.katex .cancel-lap{margin-left:-.2em;margin-right:-.2em}.katex .katex-sout{border-bottom-style:solid;border-bottom-width:.08em}.katex .angl{box-sizing:border-box;border-top:.049em solid;border-right:.049em solid;margin-right:.03889em}.katex .anglpad{padding:0 .03889em}.katex .reflectbox{display:inline-block;transform:scaleX(-1)}.katex .eqn-num:before{content:"(" counter(katexEqnNo) ")";counter-increment:katexEqnNo}.katex .mml-eqn-num:before{content:"(" counter(mmlEqnNo) ")";counter-increment:mmlEqnNo}.katex .mtr-glue{width:50%}.katex .cd-vert-arrow{display:inline-block;position:relative}.katex .cd-label-left{text-align:left;display:inline-block;position:absolute;right:calc(50% + .3em)}.katex .cd-label-right{text-align:right;display:inline-block;position:absolute;left:calc(50% + .3em)}.katex-display{text-align:center;margin:1em 0;display:block}.katex-display>.katex{text-align:center;white-space:nowrap;display:block}.katex-display>.katex>.katex-html{display:block;position:relative}.katex-display>.katex>.katex-html>.katex-tag{position:absolute;right:0}.katex-display.leqno>.katex>.katex-html>.katex-tag{left:0;right:auto}.katex-display.fleqn>.katex{text-align:left;padding-left:2em}body{counter-reset:katexEqnNo mmlEqnNo}
.study-math{letter-spacing:normal;min-width:0;max-width:100%;font-weight:400}.study-math-display{overscroll-behavior-x:contain;border:1px solid var(--line);background:var(--surface-soft);color:var(--text);text-align:center;border-radius:10px;margin:16px 0;padding:20px 16px;font-size:18px;display:block;overflow-x:auto}.study-math-display .katex-display{margin:0}.study-math-display .katex-display>.katex{min-width:min-content;display:inline-block}.study-math-inline{color:inherit}.study-math-inline .katex{font-size:1.1em}.study-math-fallback{white-space:pre-wrap;overflow-wrap:anywhere;color:inherit;font-size:.9em}.notes-formula-list,.notes-formula,.study-note-section,.study-reading-body{min-width:0}@media (max-width:600px){.study-math-display{padding:18px 12px;font-size:16px}}
:root{--background:#f5f7f4;--surface:#fff;--surface-soft:#eef2ed;--text:#172f29;--muted:#5b6c64;--line:#d4ded6;--blue:#22644e;--blue-dark:#194e3c;--blue-soft:#e6f0e9;--green:#216449;--red:#a13b37;--on-accent:#fff;--shadow:0 12px 36px #172f290a;--radius:12px;--font-workspace:Inter, "SF Pro Text", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif}:root[data-theme=dark]{--background:#101b1a;--surface:#182723;--surface-soft:#20362e;--text:#e9f1eb;--muted:#b1c1b6;--line:#3d5146;--blue:#9cd1b3;--blue-dark:#b6e2c8;--blue-soft:#254235;--green:#b3d8bd;--red:#ffb3a8;--on-accent:#102c21;--shadow:0 12px 36px #00000020}body{font-family:var(--font-workspace);text-rendering:optimizelegibility}button,input,select,textarea{font-family:inherit}::selection{background:var(--blue-soft);color:var(--text)}:focus-visible{outline:2px solid var(--blue);outline-offset:4px}:root .button{min-height:44px;box-shadow:none;border-radius:8px;font-weight:550}:root .button.primary,:root[data-theme=dark] .button.primary{background:var(--blue);color:var(--on-accent);box-shadow:none}:root .button.primary:hover:not(:disabled),:root[data-theme=dark] .button.primary:hover:not(:disabled){background:var(--blue-dark)}:root .button.secondary{background:var(--surface);color:var(--text);border-color:var(--line)}:root .button.secondary:hover:not(:disabled){background:var(--surface-soft)}:root .button.danger-button{color:var(--red);border-color:color-mix(in srgb, var(--red) 30%, var(--line));background:color-mix(in srgb, var(--red) 5%, var(--surface))}:root :is(.small-action,.icon-button,.workspace-menu>summary){border-radius:7px;min-height:36px}:root :is(.small-action,.icon-button){color:var(--muted);background:var(--surface-soft);border-color:var(--line)}:root :is(.small-action,.icon-button):hover{color:var(--blue);background:var(--blue-soft);border-color:var(--line)}:root :is(.small-action.danger,.icon-button.danger):hover{color:var(--red);background:color-mix(in srgb, var(--red) 9%, var(--surface))}:root label{color:var(--text)}:root :is(input:not([type=checkbox]):not([type=radio]),textarea,select){border-color:var(--line);background-color:var(--surface);color:var(--text);border-radius:8px}:root :is(input,textarea,select)::placeholder{color:var(--muted)}:root :is(input:not([type=checkbox]):not([type=radio]),textarea,select):focus-visible{outline:2px solid var(--blue);outline-offset:2px;border-color:var(--blue);box-shadow:none}:root .enhancement-switch,:root[data-theme=dark] .enhancement-switch{background:var(--muted)}:root .enhancement-switch:checked,:root[data-theme=dark] .enhancement-switch:checked{background:var(--blue)}:root .enhancement-switch:before,:root[data-theme=dark] .enhancement-switch:before{background:var(--on-accent)}:root :is(.tag-chip,.study-notice){color:var(--blue);background:var(--blue-soft)}:root :is(.workspace-menu-content,.study-reading-body,.study-editor,.study-source-dialog,.modal,.workspace-dialog,.auth-panel,.notes-document,.notes-toc,.transcript-document,.meeting-preview-modal,.audio-source-dialog,.backup-dialog){background:var(--surface);color:var(--text)}:root :is(.error-banner,.study-error){color:var(--red);background:color-mix(in srgb, var(--red) 7%, var(--surface))}:root :is(.arrow,.sidebar-note,.workspace-file-icon,.study-tool>svg){color:var(--muted)}:root :is(.entity-actions,.class-row,.course-card:hover){border-color:var(--line)}:root :is(.partial-stage,.formula-expression,.formula-item>code,.professor-note,.comparison-difference,.recovery-panel){background:var(--blue-soft);border-color:var(--line);color:var(--text)}:root :is(.notes-item,.notes-formula,.notes-code,.comparison-table,.term-item,.formula-item,.code-highlight,.raw-transcript,.reflow-debug,.material-list li){background:var(--surface-soft);border-color:var(--line)}:root .audio-meter{background:var(--line)}:root .return-to-live{background:var(--surface);color:var(--blue);border-color:var(--line)}:root .translation-unavailable button{color:var(--blue)}:root .class-row:hover{background:var(--surface-soft)}.app-shell .sidebar{background:var(--background)}.app-shell .sidebar .brand-mark{border:1px solid var(--line);background:var(--surface);border-radius:10px}.app-shell .sidebar .brand{gap:10px}.brand-name{white-space:nowrap;text-align:left;flex-direction:column;flex-shrink:0;justify-content:center;display:inline-flex}.brand-name>strong{letter-spacing:-.025em;font-size:21px;font-weight:650;line-height:1.2;display:block}.brand-name>strong:lang(zh-CN){letter-spacing:.06em}.brand-name>small{letter-spacing:.06em;margin-top:3px;font-size:12px;font-weight:500;line-height:1.2;display:block}.app-shell .sidebar .brand-name>strong{font-size:21px}.app-shell .nav-item{border-radius:7px;min-height:44px;font-size:13px;font-weight:500}.app-shell .nav-item.active{color:var(--blue);background:var(--blue-soft);font-weight:600}.app-shell .nav-count{background:var(--surface);font-size:11px}.app-shell .sidebar .account-control .button{font-size:12px}.app-shell .sidebar-note{font-variant-numeric:tabular-nums}.page-header h1,.class-hero h1,.study-header h1{letter-spacing:-.025em;font-weight:550}.page-description{max-width:64ch}.course-card{box-shadow:none;border-radius:12px}.course-card:hover{box-shadow:var(--shadow)}.course-card h2{font-weight:550}:root .empty-panel{border:1px solid var(--line);background:var(--surface);border-radius:12px}.empty-panel.compact{min-height:260px}.empty-illustration,.state-icon{border-radius:12px}.study-tool{border:1px solid var(--line);background:var(--surface);gap:14px;padding:22px}.study-reading-body{box-shadow:var(--shadow)}.study-reading-body h2,.meeting-minutes-reading h2{font-weight:550}.study-reading-body .study-quick-goal{font-size:18px;line-height:1.8}.meeting-page .meeting-panel{box-shadow:none;border-radius:12px}.meeting-page .meeting-day{border-radius:6px}.storage-page :is(.storage-details,.storage-backups,.cloud-sync-panel){border-radius:12px}.live-page{--live-reading-font:var(--font-workspace)}.live-shell :is(.quick-reader-frame,.transcript-window[data-has-toolbar=true]){box-shadow:none;border-radius:12px}.live-shell .transcript-reader-tools{background:var(--surface);border-bottom:1px solid var(--line)}.live-shell .transcript-layout-toggle{color:var(--muted)}.live-shell .transcript-layout-toggle:hover{color:var(--blue);background:var(--blue-soft)}.live-shell .quick-controls{box-shadow:none;border-radius:10px}.live-shell .quick-empty>svg{width:32px;height:32px}.live-shell .quick-empty h2{letter-spacing:-.02em;font-size:25px;font-weight:500}.live-shell .quick-empty p{font-size:14px}:root .meeting-turn.pending .meeting-turn-bubble{color:var(--muted)}:root .listening-status{background:var(--surface);border-color:var(--line)}.theme-corner .theme-toggle:before{border-color:var(--line)}.theme-corner .language-menu{border-radius:10px}.theme-corner .language-menu button{border-radius:6px}body:has(.public-home) .theme-corner{position:absolute;top:20px;right:clamp(16px,4vw,64px)}@media (min-width:761px) and (pointer:fine),(min-width:1024px){.app-shell .sidebar{width:224px;padding:30px 16px 18px}.app-shell .main-content{margin-left:224px}.app-shell .sidebar .brand{margin:0 10px 40px}.app-shell .sidebar nav{gap:4px}.app-shell .sidebar .account-control{margin:28px 6px 0}.app-shell .sidebar-note{padding:20px 12px 6px}.app-shell .page-container:not(.quick-page){padding-top:64px}}@media (max-width:760px),(max-width:1023px) and (pointer:coarse){:root :is(.small-action,.icon-button,.workspace-menu>summary){min-width:44px;min-height:44px}.app-shell .sidebar .brand{padding-right:88px}.app-shell .sidebar .brand-name>strong{font-size:17px}.app-shell .sidebar:has(.account-control) .brand{padding-right:0}.study-tool{padding:18px}.live-shell .quick-empty h2{font-size:21px}.live-shell .quick-reader-frame{border-radius:10px}}@media (max-width:600px){body:has(.public-home) .theme-corner{top:16px;right:12px}}@media (prefers-reduced-motion:reduce){.button,.course-card,.nav-item,.study-tool{transition:none}}