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:root{--violet:#3C25D2;--active:#2E1AAD;--light:#EBE9FA;--ink:#141418;--text:#343434;--muted:#6B6B72;--line:#D7D7D7;--bg:#F7F7F7;--risk:#FF4242;font-family:Hanken,system-ui,sans-serif;color:var(--text);background:var(--bg);font-synthesis:none;font-variant-numeric:tabular-nums}
*{box-sizing:border-box}body{margin:0}button,a,input{-webkit-tap-highlight-color:transparent}button{font:inherit;font-size:14px;font-weight:600;cursor:pointer;background:white;border:1px solid var(--line);color:var(--ink);padding:12px 19px;transition:background .15s,border-color .15s}button:hover:not(:disabled){border-color:var(--violet);color:var(--violet);background:var(--light)}button:disabled{color:var(--muted);background:var(--bg);cursor:not-allowed}a{color:var(--violet);text-decoration:none}button.primary,.primary{background:var(--violet);border:1px solid var(--violet);color:white}button.primary:hover:not(:disabled){background:var(--active);color:white}button.primary:disabled{background:#F0F0F5;border-color:var(--line);color:var(--muted)}:focus-visible{outline:2px solid var(--violet);outline-offset:4px}h1,h2,h3{color:var(--ink);margin:0;line-height:1.1}h1{font-weight:600;font-size:clamp(30px,3.2vw,44px);letter-spacing:-1.4px}h2{font-size:23px;letter-spacing:-.5px;font-weight:600}h3{font-size:18px;font-weight:600}p{line-height:1.65;margin:0 0 18px}svg{width:20px;height:20px;flex-shrink:0;stroke:currentColor;fill:none;stroke-width:1.5;stroke-linecap:square;stroke-linejoin:miter}.kicker{display:block;text-transform:uppercase;letter-spacing:.22em;font-size:10px;font-weight:500;color:var(--violet)}.small{font-size:12px;line-height:1.6}.muted{color:var(--muted)}.header{height:72px;background:white;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 32px;position:sticky;top:0;z-index:10}.brand{display:flex;align-items:center;color:var(--ink)}.brand img{width:110px;height:38px}.brand span{font-size:16px;font-weight:600;padding-left:20px;margin-left:20px;border-left:1px solid var(--line)}.header-right{display:flex;gap:20px;align-items:center;font-size:12px}.demo-tag{font-size:9px;letter-spacing:.15em;border:1px solid var(--line);padding:5px 8px;color:var(--muted)}.avatar{width:34px;height:34px;background:var(--light);color:var(--violet);display:grid;place-items:center;font-size:11px;font-weight:700}.sidebar{width:220px;position:fixed;top:72px;bottom:0;left:0;background:white;border-right:1px solid var(--line);display:flex;flex-direction:column;padding:32px 0 20px}.sidebar-top>.kicker{padding:0 25px;margin-bottom:20px}nav{display:grid;gap:4px}nav a{min-height:48px;padding:13px 23px;border-left:3px solid transparent;display:flex;align-items:center;gap:12px;font-size:13px;color:var(--text)}nav a:hover{background:var(--bg)}nav a[aria-current]{background:var(--light);border-left-color:var(--violet);font-weight:700;color:var(--ink)}nav a svg{width:17px;height:17px}.sidebar-course{margin:38px 24px 0;padding-top:24px;border-top:1px solid var(--line)}.sidebar-course p{font-size:16px;font-weight:600;line-height:1.4;margin:16px 0 8px;color:var(--ink)}.side-progress{height:3px;background:var(--light);margin:20px 0 8px}.side-progress i{display:block;height:100%;background:var(--violet)}.sidebar-bottom{margin:auto 24px 0;padding-top:28px}.text-button{padding:0;background:none;border:none;color:var(--violet);font-size:12px;text-align:left}.text-button:hover:not(:disabled){background:none;text-decoration:underline}.sidebar-bottom button{display:block;margin-top:22px}.workspace{margin-left:220px}.contextbar{height:49px;border-bottom:1px solid var(--line);padding:0 38px;display:flex;justify-content:space-between;align-items:center;font-size:11px;color:var(--muted);background:white}.contextbar>span:first-child{color:var(--text)}main{max-width:1440px;margin:auto;padding:38px}main:focus{outline:none}.page-heading{display:flex;justify-content:space-between;gap:25px;align-items:flex-end;margin-bottom:28px}.page-heading .kicker{margin-bottom:12px}.page-heading p{color:var(--muted);font-size:14px;margin:12px 0 0}.date-note{display:flex;gap:10px;align-items:center;font-size:12px;line-height:1.5;color:var(--muted);white-space:nowrap}.date-note strong{display:block;color:var(--ink);font-size:13px}.stats{background:var(--violet);color:white;display:grid;grid-template-columns:repeat(4,1fr);margin-bottom:30px}.stat{padding:23px 25px;border-right:1px solid #ffffff30}.stat:last-child{border-right:none}.stat span{display:block;font-size:12px;color:#eeeaff;margin-bottom:10px}.stat strong{font-size:29px;font-weight:600;letter-spacing:-.8px}.stat small{font-size:14px;font-weight:400;margin-left:4px;color:#e1dafd}.dashboard-grid{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:24px}.panel{background:white;border:1px solid var(--line)}.section-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:17px}.section-head h2{font-size:18px}.section-head span{font-size:11px;color:var(--muted)}.module{display:grid;grid-template-columns:48px 1fr auto;gap:18px;padding:24px;align-items:start;margin-bottom:12px}.module.active{border-left:3px solid var(--violet);padding-left:22px}.module-number{color:var(--violet);font-size:29px;letter-spacing:-1px;font-weight:500}.module h3{margin:6px 0 11px}.module p{font-size:13px;color:var(--muted);margin:0 0 16px;max-width:430px;line-height:1.5}.module-meta{display:flex;gap:15px;font-size:11px;color:var(--muted);align-items:center}.module-meta span{display:flex;align-items:center;gap:5px}.module-meta svg{width:13px;height:13px}.module-controls{text-align:right;display:flex;flex-direction:column;align-items:flex-end;justify-content:space-between;align-self:stretch;gap:24px}.tag{display:inline-block;font-size:10px;color:var(--violet);padding:4px 7px;border:1px solid #D1C7FD;background:var(--light);font-weight:600}.tag.neutral{color:var(--muted);border-color:var(--line);background:var(--bg)}.module-controls button{font-size:12px;padding:9px 14px}.note-panel{padding:25px;margin-bottom:20px}.note-panel h3{font-size:17px;margin:14px 0}.note-panel>p{font-size:13px;color:var(--muted)}.rule{display:flex;gap:12px;padding:15px 0;border-top:1px solid var(--line);font-size:12px;line-height:1.5}.rule svg{width:16px;color:var(--violet)}.rule strong{display:block;color:var(--ink);font-size:13px;margin-bottom:3px}.gift-panel{background:var(--light);border:none}.gift-panel svg{color:var(--violet);width:28px;height:28px}.gift-panel p{color:#514782}.gift-panel button{width:100%;font-size:12px}.chapter-layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:24px}.chapter-menu{align-self:start}.chapter-menu .menu-heading{padding:22px;border-bottom:1px solid var(--line);font-size:13px;font-weight:600}.chapter-menu button{display:flex;gap:12px;width:100%;text-align:left;border:0;border-bottom:1px solid #E4E4EA;padding:18px 20px;font-size:12px;font-weight:400;line-height:1.4}.chapter-menu button[aria-current]{color:var(--violet);background:var(--light);border-left:3px solid var(--violet);padding-left:17px;font-weight:600}.chapter-menu button span{font-size:11px;color:var(--muted)}.chapter-menu .menu-footer{padding:22px;font-size:12px;color:var(--muted)}.reading{padding:36px 42px}.reading-top{display:flex;justify-content:space-between;font-size:11px;color:var(--muted);margin-bottom:25px}.reading h2{font-size:30px;letter-spacing:-.8px;margin-bottom:20px;max-width:620px}.reading>p{font-size:15px;max-width:710px}.reading h3{margin:25px 0 15px}.callout{background:var(--light);border-left:3px solid var(--violet);padding:20px 24px;margin:25px 0;font-size:14px;line-height:1.6}.callout .kicker{margin-bottom:9px}.steps{margin:0;padding:0;list-style:none;counter-reset:step}.steps li{display:flex;gap:16px;padding:17px 0;border-bottom:1px solid var(--line);font-size:14px;line-height:1.6}.steps li:before{counter-increment:step;content:'0' counter(step);color:var(--violet);font-weight:600}.steps strong{display:block;color:var(--ink)}.reading-bottom{display:flex;justify-content:space-between;align-items:center;gap:16px;border-top:1px solid var(--line);margin-top:28px;padding-top:24px}.reading-bottom span{font-size:11px;color:var(--muted)}.reading details{border:1px solid var(--line);padding:17px 20px;margin:22px 0}.reading summary{cursor:pointer;font-size:14px;font-weight:600}.reading details p{margin:15px 0 0;font-size:13px}.quiz-layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:24px;max-width:1100px;margin:auto}.quiz-heading{max-width:1100px;margin-left:auto;margin-right:auto}.quiz-card{padding:32px 36px;min-width:0}.quiz-card h2{font-size:27px;line-height:1.3;margin:27px 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.answer-letter{color:white;background:var(--violet);border-color:var(--violet)}.quiz-actions{display:flex;justify-content:space-between;align-items:center;margin-top:28px;gap:15px}.quiz-actions>span{font-size:11px;color:var(--muted);max-width:230px;line-height:1.5}.timer-panel{padding:25px;background:white;border:1px solid var(--line)}.timer-panel .kicker{font-size:9px;letter-spacing:.17em}.timer-number{font-size:52px;letter-spacing:-2px;color:var(--violet);line-height:1.2;margin:18px 0 8px}.timer-bar{height:4px;background:var(--light);margin-bottom:17px}.timer-bar i{height:100%;display:block;background:var(--violet);width:100%;transition:width .25s}.timer-panel p{font-size:12px;color:var(--muted);line-height:1.6;margin:0}.timer-panel.urgent{border-color:var(--risk)}.timer-panel.urgent .timer-number{color:#C32424}.timer-panel.urgent .timer-bar i{background:var(--risk)}.quiz-side-note{padding:24px 5px;font-size:12px;color:var(--muted);line-height:1.7}.quiz-side-note 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32px);color:var(--text);font:inherit}dialog::backdrop{background:#14141880}dialog p{margin:20px 0;font-size:14px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}
@media(min-width:1600px){main{padding:48px 55px}.contextbar{padding-inline:55px}.dashboard-grid{grid-template-columns:minmax(0,1fr) 320px}.module{padding:30px}.module.active{padding-left:28px}}
@media(max-width:1150px){.sidebar{width:190px}.workspace{margin-left:190px}main{padding:28px}.contextbar{padding:0 28px}.dashboard-grid{grid-template-columns:minmax(0,1fr) 245px;gap:18px}.module{grid-template-columns:34px 1fr;gap:12px;padding:20px}.module.active{padding-left:18px}.module-controls{grid-column:2;flex-direction:row;align-items:center;gap:10px}.chapter-layout{grid-template-columns:200px minmax(0,1fr);gap:18px}.reading{padding:28px}.quiz-layout{grid-template-columns:minmax(0,1fr) 220px;gap:18px}.quiz-card{padding:25px}.stat{padding:20px}.date-note{display:none}}
@media(max-width:900px){.sidebar{width:170px}.workspace{margin-left:170px}.sidebar-course{margin-inline:19px}.sidebar-top>.kicker{padding:0 19px;font-size:9px}nav a{padding-inline:17px}.dashboard-grid{grid-template-columns:1fr}.dashboard-aside{display:grid;grid-template-columns:1fr 1fr;gap:16px}.chapter-layout{grid-template-columns:1fr}.chapter-menu{display:flex;flex-wrap:wrap}.chapter-menu .menu-heading{width:100%;padding:15px}.chapter-menu button{flex:1;padding:12px}.chapter-menu button[aria-current]{padding-left:9px}.chapter-menu .menu-footer{display:none}.quiz-layout{grid-template-columns:1fr}.quiz-aside{order:-1}.timer-panel{display:flex;align-items:center;gap:20px;padding:15px 20px;flex-wrap:wrap}.timer-number{font-size:32px;margin:0;letter-spacing:-1px}.timer-bar{width:100%;margin:0;order:4}.timer-panel p{flex:1}.quiz-side-note{display:none}.quiz-layout:has(.quiz-intro) .quiz-aside,.quiz-layout:has(.result) .quiz-aside{display:none}.stat{padding:17px 14px}.stat strong{font-size:25px}.page-heading h1{font-size:33px}}
@media(max-width:620px){.header{height:62px;padding:0 16px}.brand img{width:88px;height:32px}.brand span{font-size:14px;margin-left:12px;padding-left:12px}.header-right{gap:10px}.account-name{display:none}.demo-tag{font-size:8px;padding:4px}.avatar{width:28px;height:28px}.sidebar{position:sticky;top:62px;width:100%;height:auto;z-index:9;padding:0;border-right:0;border-bottom:1px solid var(--line)}.sidebar-top>.kicker,.sidebar-course,.sidebar-bottom{display:none}nav{display:flex;gap:0}nav a{flex:1;justify-content:center;min-height:46px;padding:12px 8px;border-left:0;border-bottom:3px solid transparent;font-size:12px;gap:7px}nav a[aria-current]{border-bottom-color:var(--violet)}.workspace{margin-left:0}.contextbar{padding:0 18px;font-size:10px;height:42px}.contextbar>span:last-child{display:none}main{padding:25px 18px}.page-heading{margin-bottom:22px}.page-heading h1{font-size:31px}.page-heading p{font-size:13px}.stats{grid-template-columns:1fr 1fr;margin-bottom:24px}.stat{padding:18px;border-bottom:1px solid #ffffff30}.stat:nth-child(2){border-right:0}.stat span{font-size:11px;margin-bottom:6px}.stat strong{font-size:26px}.module{grid-template-columns:30px 1fr;padding:20px 16px}.module.active{padding-left:14px}.module-number{font-size:26px}.module h3{font-size:18px}.module-controls{flex-wrap:wrap}.module-controls button{margin-left:auto}.dashboard-aside{grid-template-columns:1fr;gap:0}.note-panel{padding:22px}.chapter-menu button{font-size:11px;min-width:30%}.reading{padding:24px 20px}.reading h2{font-size:27px}.reading>p{font-size:14px}.reading-top{font-size:10px}.reading-bottom{align-items:flex-start;flex-direction:column}.reading-bottom button{width:100%}.quiz-card{padding:23px 18px}.quiz-card h2{font-size:24px}.answer{padding:14px 12px;font-size:13px;gap:10px}.quiz-actions{align-items:stretch;flex-direction:column}.quiz-actions>span{max-width:none}.timer-panel{gap:12px;padding:14px}.timer-panel .kicker{font-size:8px;max-width:90px}.timer-panel p{font-size:10px;min-width:100px}.timer-number{font-size:30px}.quiz-rules strong{font-size:21px}.quiz-rules span{font-size:10px}footer{padding:0 18px 20px;flex-direction:column;gap:6px}.actions button{width:100%}.screen-note{font-size:10px}}
.mobile-reset{display:none}@media(max-width:620px){.mobile-reset{display:block;margin-top:10px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}