@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Montserrat:wght@700;800&display=swap";:root{--color-navy-800:#036;--color-navy-900:#024;--color-navy-700:#0b5c9e;--color-green-600:#0b9547;--color-green-700:#077a39;--color-cyan-400:#4fb2fb;--color-mint-300:#6ee7a5;--color-white:#fff;--color-slate-50:#f8fafc;--color-slate-100:#f1f5f9;--color-surface-alt:#f5f8fa;--color-blue-tint:#eaf4fb;--color-border:#e2e8f0;--color-divider:#e8eef4;--color-border-strong:#cbd5e1;--color-text:#1e293b;--color-text-secondary:#475569;--color-text-muted:#64748b;--color-text-subtle:#94a3b8;--color-footer-muted:#d8e6f3;--color-success:var(--color-green-600);--color-success-strong:var(--color-green-700);--color-warning:#d97706;--color-warning-strong:#b45309;--color-danger:#dc2626;--color-info:#2563eb;--color-focus:var(--color-cyan-400);--color-overlay:#031428bd;--color-dark-surface:#0a1b2b;--color-hero-navy:#0a2947;--color-panel-top:#eef4f8;--color-panel-bottom:#e4edf3;--color-success-surface:color-mix(in srgb, var(--color-green-600) 8%, var(--color-white));--color-success-border:color-mix(in srgb, var(--color-green-600) 30%, var(--color-white));--color-warning-surface:color-mix(in srgb, var(--color-warning) 8%, var(--color-white));--color-warning-border:color-mix(in srgb, var(--color-warning) 35%, var(--color-white));--color-danger-surface:color-mix(in srgb, var(--color-danger) 6%, var(--color-white));--color-danger-border:color-mix(in srgb, var(--color-danger) 30%, var(--color-white));--color-grid:#4fb2fb1f;--color-shadow-soft:#0022440f;--color-shadow-medium:#0022441a;--color-shadow-strong:#0243;--color-mask:#000;--font-body:"Inter", sans-serif;--font-heading:"Montserrat", sans-serif;--radius-button-small:6px;--radius-control:8px;--radius-card-small:12px;--radius-panel:16px;--radius-pill:999px;--container-width:1400px;--space-1:4px;--space-2:8px;--space-3:16px;--space-4:24px;--space-5:32px;--space-6:48px;--space-7:64px;--space-8:96px;--green:var(--color-green-600);--green-dark:var(--color-green-700);--mint:var(--color-success-surface);--navy:var(--color-navy-800);--ink:var(--color-text);--muted:var(--color-text-muted);--line:var(--color-border);--paper:var(--color-slate-50);--white:var(--color-white);--orange:var(--color-warning);font-family:var(--font-body);color:var(--ink);background:var(--paper);font-synthesis:none}*{box-sizing:border-box}body{margin:0;font-size:14px;line-height:1.6}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.45}a{color:inherit;text-decoration:none}:is(button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible){outline:3px solid var(--color-focus);outline-offset:4px}button{color:inherit;background:0 0;border:0}h1,h2,h3,p{margin:0}h1,h2,h3{font-family:var(--font-heading);color:var(--color-navy-800);letter-spacing:-.04em;font-weight:700;line-height:1.35}h1{font-size:38px;font-weight:700}h2{font-size:22px;font-weight:700}h3{font-size:16px;font-weight:600}small{font-size:11px}svg{flex-shrink:0}.app-shell{min-height:100vh;display:flex}.sidebar{background:var(--color-white);border-right:1px solid var(--line);z-index:20;flex-direction:column;width:236px;padding:36px 22px 20px;display:flex;position:fixed;inset:0 auto 0 0}.brand{text-align:left;align-items:center;margin-bottom:48px;padding:0 3px;display:flex}.brand-type{color:var(--navy);letter-spacing:.06em;font-size:12px;font-weight:600;line-height:1.35}.brand-type b{color:var(--color-green-700);letter-spacing:0;font-size:14px}.brand-line{background:var(--color-border);width:1px;height:30px;margin:0 10px}.brand-logistics{letter-spacing:.1em;color:var(--color-text-muted);font-size:8px;font-weight:600}.workspace-label{letter-spacing:.13em;color:var(--color-text-muted);margin-bottom:17px;padding-left:14px;font-size:9px}nav{flex-direction:column;gap:8px;display:flex}nav button{text-align:left;color:var(--color-text-muted);border-radius:9px;align-items:center;gap:12px;padding:13px 14px;font-size:12px;font-weight:500;transition:all .18s;display:flex}nav button:hover{background:var(--color-slate-50)}nav button.active{background:var(--mint);color:var(--color-green-700);font-weight:600}.nav-count{background:var(--color-success-surface);border-radius:5px;place-items:center;min-width:19px;height:19px;margin-left:auto;font-size:10px;display:grid}.sidebar-note{background:var(--color-slate-50);border-radius:12px;margin-top:auto;padding:20px 17px}.tiny-icon{color:var(--color-green-700);background:var(--color-success-surface);border-radius:8px;justify-content:center;align-items:center;width:33px;height:33px;display:inline-flex}.sidebar-note b{margin:12px 0 7px;font-size:12px;display:block}.sidebar-note p{color:var(--muted);font-size:10px;line-height:1.9}.sidebar-note button{color:var(--green);align-items:center;gap:6px;margin-top:16px;padding:0;font-size:10px;display:flex}.sidebar-bottom{letter-spacing:.06em;color:var(--color-text-muted);align-items:center;gap:6px;margin-top:25px;font-size:8px;display:flex}.live-dot{background:var(--color-green-600);border-radius:50%;width:5px;height:5px}.sidebar-bottom button{margin-left:auto;padding:0}.main-shell{flex:1;min-width:0;margin-left:236px}.topbar{background:var(--color-white);border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:20px;height:87px;padding:0 42px;display:flex}.breadcrumb{color:var(--color-text-muted);align-items:center;gap:13px;font-size:11px;display:flex}.breadcrumb b{color:var(--color-text-muted);font-weight:500}.account{align-items:center;gap:12px;display:flex}.private-badge{color:var(--color-text-muted);align-items:center;gap:5px;margin-right:8px;font-size:9px;display:flex}.avatar{background:var(--color-slate-100);width:34px;height:34px;color:var(--color-text-muted);border:1px solid var(--color-border);border-radius:50%;place-items:center;font-size:11px;font-weight:600;display:grid}.account-text{max-width:180px}.account-text b{white-space:nowrap;text-overflow:ellipsis;font-size:10px;display:block;overflow:hidden}.account-text small{color:var(--color-text-muted);font-size:8px;display:block}.account>a{color:var(--color-text-muted);margin-left:10px}.mobile-brand{display:none}.content{max-width:var(--container-width);margin:auto;padding:39px 42px 0}.eyebrow{color:var(--color-green-700);letter-spacing:.13em;margin-bottom:15px;font-size:9px;font-weight:600}.page-heading{justify-content:space-between;align-items:center;gap:35px;margin-bottom:31px;display:flex}.page-heading h1{font-size:36px;line-height:1.5}.page-heading h1 span{color:var(--color-navy-800);font-weight:400}.page-heading p{color:var(--color-text-muted);margin-top:12px;font-size:11px}.edition{border-left:1px solid var(--color-border);padding:9px 0 9px 24px}.edition span{letter-spacing:.13em;color:var(--color-text-muted);font-size:8px;display:block}.edition b{margin:6px 0;font-size:12px;font-weight:500;display:block}.edition small{color:var(--color-text-muted);font-size:9px}.stats{grid-template-columns:repeat(3,1fr);gap:19px;margin-bottom:36px;display:grid}.stats>div{background:var(--color-white);border:1px solid 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small{color:var(--color-text-muted);font-size:6px;display:block}.comment-dot{background:var(--color-green-600);border-radius:50%;width:5px;height:5px;margin-left:auto}.art-bottom{letter-spacing:.2em;color:var(--color-text-muted);font-size:7px;position:absolute;bottom:18px;left:30px}.art-play{border:5px solid var(--color-border);background:var(--color-white);color:var(--color-navy-800);width:58px;height:58px;box-shadow:0 3px 15px var(--color-shadow-medium);border-radius:50%;place-items:center;display:grid;position:absolute;bottom:24px;right:25px}.art-play svg{margin-left:3px}.course-info{padding:30px 32px}.course-tags{align-items:center;gap:10px;margin-bottom:17px;display:flex}.tag{background:var(--color-success-surface);color:var(--color-green-700);letter-spacing:.07em;border-radius:4px;padding:5px 9px;font-size:8px;font-weight:600;display:inline-block}.sample-tag{color:var(--color-text-muted);letter-spacing:.03em;font-size:8px}.course-info h2{max-width:360px;margin-bottom:9px;font-size:25px;line-height:1.5}.course-info>p{color:var(--color-text-muted);max-width:350px;font-size:11px;line-height:1.9}.course-meta{color:var(--color-text-muted);flex-wrap:wrap;gap:15px;margin:18px 0;font-size:8px;display:flex}.course-meta span{align-items:center;gap:5px;display:flex}.course-progress{margin:18px 0}.course-progress>div:first-child{color:var(--color-text-muted);justify-content:space-between;margin-bottom:7px;font-size:9px;display:flex}.course-progress b{color:var(--green);font-weight:500}.progress-track{background:var(--color-divider);border-radius:20px;height:4px;overflow:hidden}.progress-track i{background:var(--green);border-radius:20px;height:100%;transition:width .3s;display:block}.button{border-radius:7px;justify-content:center;align-items:center;gap:12px;min-height:40px;padding:11px 19px;font-size:10px;font-weight:500;transition:background .15s,transform 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video{aspect-ratio:16/9;object-fit:contain;background:var(--color-blue-tint);cursor:pointer;width:100%;display:block}.player:-webkit-full-screen{flex-direction:column;justify-content:center;display:flex}.player:fullscreen{flex-direction:column;justify-content:center;display:flex}.player:-webkit-full-screen video{max-height:80vh}.player:fullscreen video{max-height:80vh}.big-play{background:var(--color-white);width:70px;height:70px;color:var(--color-green-700);box-shadow:0 8px 45px var(--color-shadow-strong);border-radius:50%;place-items:center;display:grid;position:absolute;top:44%;left:50%;transform:translate(-50%,-50%)}.big-play svg{margin-left:4px}.player-controls{color:var(--color-footer-muted);background:var(--color-navy-900);padding:9px 15px 12px}.video-timeline{align-items:center;height:14px;display:flex;position:relative}.video-timeline input{width:100%;accent-color:var(--color-text-muted);cursor:pointer;height:4px;margin:0}.video-timeline>span{background:var(--color-warning);border:2px solid var(--color-navy-900);pointer-events:none;border-radius:50%;width:8px;height:8px;position:absolute;transform:translate(-50%)}.video-timeline>span.done{background:var(--color-green-600)}.control-row{align-items:center;gap:14px;margin-top:5px;display:flex}.control-row button{color:var(--color-footer-muted);align-items:center;padding:1px;display:flex}.video-time{letter-spacing:.03em;font-size:9px}.video-time em{color:var(--color-footer-muted);margin-left:8px;font-style:normal}.control-spacer{flex:1}.control-row select{color:var(--color-footer-muted);background:var(--color-navy-900);cursor:pointer;border:0;font-size:9px}.video-caption{color:var(--color-text-muted);align-items:center;gap:7px;margin:12px 0 23px;font-size:9px;display:flex}.takeaway{background:var(--color-success-surface);border:1px solid 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var(--color-border);background:var(--color-slate-50);width:26px;height:26px;color:var(--color-text-muted);border-radius:50%;flex-shrink:0;place-items:center;font-size:9px;display:grid}.outline-number.done{background:var(--color-success-surface);color:var(--color-green-700);border-color:var(--color-success-surface)}.outline-item.current .outline-number{background:var(--color-green-700);color:var(--color-white)}.outline-item b{margin-top:2px;font-size:9px;font-weight:500;display:block}.outline-item small{color:var(--color-text-muted);margin-top:4px;font-size:8px;display:block}.outline-final{border-top:1px solid var(--line);margin-top:1px;padding-top:21px}.outline-final>.stat-icon{border-radius:8px;width:33px;height:33px;margin-bottom:11px}.outline-final h3{font-size:12px}.outline-final p{color:var(--color-text-muted);margin:8px 0 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p{margin-top:5px;font-size:10px;line-height:1.9}.positive{background:var(--color-success-surface);color:var(--color-green-700)}.neutral{background:var(--color-warning-surface);color:var(--color-warning-strong)}.media-error{background:var(--color-blue-tint);flex-direction:column;justify-content:center;align-items:center;gap:18px;display:flex;position:absolute;inset:0 0 67px}.quiz-page{grid-template-columns:1fr 1.4fr;gap:65px;min-height:580px;padding:35px 0 70px;display:grid}.quiz-intro h1{margin:20px 0 15px;font-size:34px;line-height:1.5}.quiz-intro h1 span{color:var(--color-navy-800);font-weight:400}.quiz-intro p{color:var(--color-text-muted);max-width:300px;font-size:11px;line-height:2}.quiz-facts{color:var(--color-text-muted);flex-direction:column;gap:13px;margin:25px 0;font-size:10px;display:flex}.quiz-facts>span{align-items:center;gap:10px;display:flex}.quiz-dots{gap:9px;margin-top:29px;display:flex}.quiz-dots button{border:1px solid 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