@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700;800&display=swap');
:root{--bg:#f7f6ff;--surface:#fff;--violet:#7c3aed;--violet-light:#ede9fe;--green:#059b79;--ink:#1a1040;--muted:#665f80;--line:#e6e1f3;--gradient:linear-gradient(120deg,#10b981,#7c3aed);--shadow:0 6px 30px #49308008;--sidebar:270px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.75 Manrope,system-ui,sans-serif}button,a,input{ -webkit-tap-highlight-color:transparent}button,input{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer}a{color:var(--violet);text-underline-offset:3px}button:disabled{cursor:not-allowed;opacity:.5}:focus-visible{outline:3px solid #7c3aed;outline-offset:4px}h1,h2,h3,p{margin-top:0}h1,h2,h3{line-height:1.25;letter-spacing:-.035em}h1{font-size:clamp(29px,4vw,46px);font-weight:800;margin-bottom:22px}h2{font-size:25px;margin-bottom:17px}h3{font-size:18px;margin-bottom:10px}p{margin-bottom:16px}svg{display:block}ul{padding-left:22px}li+li{margin-top:9px}.topbar{height:76px;background:#ffffffed;backdrop-filter:blur(15px);border-bottom:1px solid var(--line);display:flex;align-items:center;gap:16px;padding:0 32px;position:sticky;top:0;z-index:30}.brand{text-decoration:none;display:flex;align-items:center;gap:12px;color:var(--ink);font-weight:800;line-height:1.5;font-size:14px}.brand-symbol{display:grid;place-items:center;width:39px;height:43px;border-radius:12px;background:var(--gradient);font-size:33px;font-weight:500;color:#fff}.brand-sub{display:block;font-size:11px;font-weight:500;color:var(--muted)}.org{margin-left:auto;font-size:12px;font-weight:800;letter-spacing:.08em}.version{font-size:10px;padding:4px 10px;border:1px solid var(--line);border-radius:6px;color:var(--muted);letter-spacing:.08em}.sidebar{position:fixed;top:76px;bottom:0;width:var(--sidebar);padding:30px 20px 20px;background:#fff;border-right:1px solid var(--line);display:flex;flex-direction:column;z-index:25;overflow:auto}.sidebar-heading{display:flex;align-items:center;justify-content:space-between;margin:0 12px 16px}.eyebrow{font-size:10px;letter-spacing:.14em;font-weight:800;color:var(--muted)}.nav-label{display:block;font-size:10px;color:var(--muted);font-weight:800;letter-spacing:.1em;margin:23px 12px 9px}.nav-link{display:flex;align-items:center;gap:11px;text-decoration:none;color:var(--muted);padding:10px 12px;border-radius:10px;font-size:12px;line-height:1.5;margin-bottom:5px;font-weight:600;min-height:44px}.nav-link:hover{background:#f7f5fc}.nav-link.active{background:var(--violet-light);color:var(--violet);font-weight:800}.nav-number{width:22px;height:22px;border:1px solid var(--line);border-radius:7px;display:grid;place-items:center;font-size:10px;flex-shrink:0;color:var(--muted)}.nav-number.done{background:#e0f6ef;border-color:#e0f6ef;color:#087b62}.sidebar-bottom{margin-top:auto;padding:28px 12px 0}.sidebar-bottom p{font-size:10px;color:var(--muted);line-height:1.6;margin:11px 0 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var(--line);border-radius:25px;overflow:hidden;box-shadow:var(--shadow)}.hero-main{display:grid;grid-template-columns:1.12fr 1fr;min-height:410px}.hero-copy{padding:40px 0 36px 40px;position:relative;z-index:1}.badge{display:inline-flex;align-items:center;gap:7px;font-size:10px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--violet);background:var(--violet-light);padding:5px 10px;border-radius:6px;margin-bottom:20px}.badge i{width:6px;height:6px;border-radius:50%;background:var(--violet)}.hero h1{font-size:clamp(32px,3.3vw,49px);line-height:1.14;margin-bottom:20px}.gradient-text{background:var(--gradient);background-clip:text;-webkit-background-clip:text;color:transparent}.hero-copy p{color:var(--muted);font-size:13px;max-width:355px;line-height:1.85;margin-bottom:25px}.button{display:inline-flex;align-items:center;justify-content:center;gap:12px;border-radius:10px;padding:12px 20px;font-size:12px;font-weight:800;text-decoration:none;min-height:45px;border:1px 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var(--line);padding-top:20px;display:flex;gap:20px;justify-content:space-between;align-items:center;font-size:10px;color:var(--muted);flex-wrap:wrap}.footer a{color:var(--muted)}.module-heading{margin-bottom:30px}.module-heading h1{max-width:700px;font-size:36px}.lead{font-size:15px;color:var(--muted);max-width:750px;line-height:1.9}.module-meta{font-size:11px;color:var(--muted);display:flex;gap:17px;align-items:center;margin-bottom:19px}.module-meta .badge{margin:0}.content-card{padding:28px 30px;background:#fff;border:1px solid var(--line);border-radius:17px;margin-bottom:17px}.content-card p,.content-card li{font-size:13px;color:var(--muted)}.content-card p:last-child{margin:0}.content-card h2{font-size:20px}.definition-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:13px}.definition{background:#f8f6fd;border-radius:12px;padding:18px}.definition h3{font-size:13px;letter-spacing:0}.definition 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.button{max-width:70%}.module-hint{font-size:11px;color:var(--muted);margin-bottom:20px}.power-diagram{display:grid;grid-template-columns:1fr 24px 1fr 24px 1fr;align-items:center;gap:6px;margin:22px 0}.power-node{border:1px solid var(--line);background:#f8f6fd;padding:15px 8px;text-align:center;border-radius:11px;font-size:11px;font-weight:800}.power-node span{display:block;font-size:10px;font-weight:400;color:var(--muted);margin-top:5px}.power-arrow{text-align:center;color:var(--violet)}.power-warning{font-size:11px;color:var(--muted);padding-top:12px;border-top:1px solid var(--line)}.checkmark{color:var(--green)}.test-panel{max-width:760px}.test-intro{padding:35px;background:#fff;border:1px solid var(--line);border-radius:22px}.test-intro h1{font-size:34px}.test-facts{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;margin:26px 0}.test-fact{border:1px solid var(--line);border-radius:12px;padding:17px;text-align:center}.test-fact strong{display:block;font-size:23px}.test-fact 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19px;border-radius:18px;background:#dcf5e9;color:var(--green);font-size:27px}.result-icon.retry{background:#fff0e7;color:#a35129}.result-score{font-size:55px;font-weight:800;letter-spacing:-.07em;line-height:1.2}.result-score span{font-size:24px;color:var(--muted)}.result-hero h1{font-size:27px;margin:12px 0}.result-hero p{font-size:12px;color:var(--muted)}.button-group{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-top:24px}.review-card{border:1px solid var(--line);border-radius:14px;background:#fff;padding:23px;margin:13px 0}.review-card h3{font-size:14px;line-height:1.7;letter-spacing:0}.review-card p{font-size:12px;margin-bottom:8px;color:var(--muted)}.review-status{display:block;color:var(--green);font-size:10px;font-weight:800;margin-bottom:8px}.review-status.incorrect{color:#ad4d26}.review-answer{padding:9px 12px;background:#f7f5fb;border-radius:8px}.review-card a{font-size:11px}.source-list{display:grid;gap:13px}.source-list a{font-size:13px;word-break:break-word}.source-list small{display:block;font-size:11px;color:var(--muted)}.summary-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.summary-grid .content-card{margin:0}.storage-message{position:fixed;bottom:14px;right:14px;max-width:370px;padding:15px 20px;background:#fff4dc;border:1px solid #edcd89;box-shadow:var(--shadow);border-radius:12px;font-size:11px;z-index:40}.skip{position:fixed;top:-100px;left:10px;background:white;padding:12px;z-index:99}.skip:focus{top:5px}legend{padding:0}.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}.empty-note{font-size:12px;color:var(--muted)}.print-only{display:none}.reset-section{margin-top:30px}dialog{border:1px solid var(--line);border-radius:20px;padding:30px;max-width:430px;color:var(--ink);box-shadow:var(--shadow)}dialog::backdrop{background:#1a104060}dialog h2{font-size:22px}dialog p{font-size:13px;color:var(--muted)}
.hero-copy{min-width:0}.hero h1{overflow-wrap:anywhere}.hero-main{grid-template-columns:minmax(0,1.3fr) minmax(0,1fr)}
@media(min-width:1500px){main{max-width:1510px;margin-left:var(--sidebar)}}
@media(max-width:1100px){:root{--sidebar:235px}.sidebar{padding-left:12px;padding-right:12px}main{padding:30px 25px}.hero-copy{padding:30px 0 26px 27px}.hero h1{font-size:35px}.hero-stats{padding:18px 26px}.hero-copy p{font-size:12px}.learning-card{padding:17px}.hero-art{padding:7px}.hero-main{min-height:370px}.art-caption{font-size:8px;right:15px}}
@media(max-width:850px){:root{--sidebar:260px}.sidebar{transform:translateX(-100%);transition:transform .2s;top:76px}.sidebar.open{transform:translateX(0)}.menu-button,#menu-close{display:grid}main{margin-left:0;max-width:none;padding:28px 22px}.topbar{padding:0 18px;gap:10px}.org{font-size:10px}.version{display:none}.hero h1{font-size:40px}.hero-main{min-height:370px}.hero-copy{padding-left:30px}.hero-art{padding:20px}.art-caption{bottom:16px}.sidebar-bottom{margin-top:24px}}
@media(max-width:600px){body{font-size:14px}.topbar{height:66px;padding:0 10px}.brand{font-size:12px;gap:9px}.brand-sub{font-size:9px}.brand-symbol{width:31px;height:36px;font-size:28px;border-radius:10px}.org{font-size:8px;max-width:64px;text-align:right;line-height:1.6}.sidebar{top:66px}.overlay{top:66px}main{padding:23px 16px}.crumb{font-size:10px;margin-bottom:20px}.hero-main{grid-template-columns:1fr}.hero-copy{padding:28px 25px 8px}.hero h1{font-size:38px;max-width:350px}.hero-copy p{max-width:100%;font-size:13px}.hero-art{height:230px;padding:0 25px}.hero-art svg{height:235px;width:auto;max-width:100%}.art-caption{right:20px;bottom:10px}.hero-stats{padding:17px 20px;gap:8px}.stat{gap:7px}.stat strong{font-size:19px}.stat span{font-size:9px}.learning-grid{grid-template-columns:1fr}.learning-card{display:grid;grid-template-columns:37px 1fr;gap:0 15px;padding:19px}.learning-card .small-icon{grid-row:1/3;margin:0}.learning-card h3{margin:1px 0 6px}.learning-card p{font-size:12px}.section-title{margin-top:27px}.section-title>span{font-size:9px}.course-row{padding:15px;gap:10px}.row-title{font-size:11px}.row-time{font-size:9px}.notice{font-size:11px;padding:15px}.module-heading h1{font-size:29px}.module-meta{font-size:10px}.lead{font-size:13px}.content-card,.case-card{padding:22px 20px}.content-card h2{font-size:19px}.definition-grid{grid-template-columns:1fr}.module-actions .button{font-size:11px;padding:11px 13px}.test-intro{padding:25px 20px}.test-intro h1{font-size:28px}.test-facts{gap:8px}.test-fact{padding:12px 6px}.test-fact strong{font-size:21px}.test-fact span{font-size:9px}.quiz-card{padding:25px 20px}.quiz-card h1{font-size:19px}.quiz-controls{gap:8px}.quiz-controls .button{font-size:11px;padding:12px 14px}.result-hero{padding:27px 20px}.summary-grid{grid-template-columns:1fr}.power-node{font-size:10px;padding:12px 5px}.power-node span{font-size:8px}.power-diagram{grid-template-columns:1fr 15px 1fr 15px 1fr;gap:3px}.footer{margin-top:30px}.button-group .button{flex:1;white-space:nowrap}.storage-message{left:14px;max-width:none}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}
@media(max-width:600px){.hero-main{grid-template-columns:minmax(0,1fr)}.hero h1{font-size:clamp(23px,6.6vw,33px);line-height:1.24}.hero-copy{padding-right:22px;padding-left:22px}.hero-copy p{font-size:12px}.badge{font-size:8px;letter-spacing:.045em;max-width:100%;white-space:normal}.art-caption{font-size:7px;right:17px}.hero-art{overflow:hidden}.hero-art svg{height:220px}.hero-note{font-size:9px}.section-title{flex-wrap:wrap}.section-title h2{font-size:19px}.course-row:last-child .row-time{max-width:95px;text-align:right;white-space:normal}}
@media print{body{background:#fff;color:#000;font:12px/1.5 Arial,sans-serif}.topbar,.sidebar,.overlay,.crumb,.footer,.no-print,.button,.quiz-controls,.skip,.storage-message{display:none!important}main{margin:0;padding:0;max-width:none}.content-card,.review-card,.result-hero{box-shadow:none;border:1px solid #ccc;break-inside:avoid}.print-only{display:block}.result-icon{display:none}.result-score{font-size:38px}.result-hero{padding:16px}.review-card{padding:13px;margin:9px 0}.review-card a{display:none}.source-list a{color:#000}.module-actions{display:none}.summary-grid{display:block}.summary-grid .content-card{margin-bottom:10px}h1,h2,h3{color:#000}.notice,.callout{background:white;border:1px solid #ccc}.result-hero .badge{background:white;color:black}.section-title{margin-top:20px}}