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:root{--asphalt:#1c2127;--asphalt-2:#2a3038;--asphalt-3:#3a414b;--paper:#f4f5f3;--white:#fff;--line:#d9dcd7;--muted:#59616a;--brand:#007a3d;--brand-dark:#006b35;--brand-deep:#004d27;--brand-tint:#e6f4ec;--red:#cd212a;--red-dark:#a51b22;--red-tint:#fcebec;--green:#007a3d;--green-tint:#e6f4ec;--tricolore:linear-gradient(90deg, #008c45 0 33.34%, #f4f5f0 33.34% 66.67%, #cd212a 66.67% 100%);--font-body-stack:var(--font-body), system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--font-display-stack:var(--font-display), "Arial Narrow", system-ui, sans-serif;--radius:6px;--radius-lg:12px;--wrap:1180px;--gutter:16px}@media (min-width:720px){:root{--gutter:28px}}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-padding-top:84px}@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}body{background:var(--paper);color:var(--asphalt);font-family:var(--font-body-stack);margin:0;font-size:19px;line-height:1.65;overflow-x:hidden}img{max-width:100%;height:auto}a{color:var(--brand);text-underline-offset:.18em;text-decoration-thickness:1px}a:hover{color:var(--brand-dark);text-decoration-thickness:2px}:focus-visible{outline:3px solid var(--red);outline-offset:2px;border-radius:2px}h1,h2,h3,h4{font-family:var(--font-display-stack);letter-spacing:-.005em;text-wrap:balance;font-weight:700;line-height:1.15}.sr-only{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.skip-link{z-index:100;background:var(--brand);color:var(--asphalt);border-radius:var(--radius);padding:10px 14px;font-weight:700;position:absolute;top:-60px;left:12px}.skip-link:focus{top:12px}.wrap{max-width:var(--wrap);padding:0 var(--gutter);margin:0 auto}.btn{border-radius:var(--radius);min-height:44px;font:600 17px/1.2 var(--font-body-stack);cursor:pointer;border:2px solid #0000;justify-content:center;align-items:center;gap:8px;padding:10px 18px;text-decoration:none;transition:background-color .15s,border-color .15s,color .15s;display:inline-flex}.btn:hover{text-decoration:none}.btn-primary{background:var(--brand);color:var(--white)}.btn-primary:hover{background:var(--brand-dark);color:var(--white)}.btn-dark{background:var(--asphalt);color:var(--white)}.btn-dark:hover{background:var(--asphalt-3);color:var(--white)}.btn-ghost{background:var(--white);border-color:var(--line);color:var(--asphalt)}.btn-ghost:hover{border-color:var(--asphalt);color:var(--asphalt)}.btn-ghost-light{color:var(--white);background:0 0;border-color:#ffffff73}.btn-ghost-light:hover{border-color:var(--white);color:var(--white)}.btn-small{min-height:38px;padding:6px 14px;font-size:16px}.btn-large{min-height:54px;padding:12px 26px;font-size:19px}.btn:disabled{opacity:.45;cursor:default}.linklike{color:var(--brand);font:inherit;text-underline-offset:.18em;cursor:pointer;background:0 0;border:0;padding:0;text-decoration:underline}.site-header{z-index:50;background:var(--asphalt);color:var(--white);border-bottom:1px solid #000;position:sticky;top:0}.header-inner{max-width:var(--wrap);padding:0 var(--gutter);align-items:center;gap:24px;height:64px;margin:0 auto;display:flex}.brand{color:var(--white);flex-shrink:0;text-decoration:none}.brand:hover{color:var(--white)}.brand-logo{align-items:center;gap:10px;display:inline-flex}.brand-mark{flex-shrink:0;display:block}.brand-name{font:700 22px/1 var(--font-display-stack);letter-spacing:.005em;white-space:nowrap}.nav-desktop{gap:4px;margin-right:auto;display:none}.nav-desktop a{color:#d5d9de;border-radius:var(--radius);padding:8px 10px;font-size:17px;font-weight:600;text-decoration:none}.header-tools{align-items:center;gap:10px;margin-left:auto;display:flex}.header-cta{display:none}.nav-mobile{position:relative}.nav-mobile summary{cursor:pointer;border-radius:var(--radius);flex-direction:column;justify-content:center;align-items:center;gap:5px;width:44px;height:44px;list-style:none;display:flex}.nav-mobile summary::-webkit-details-marker{display:none}.nav-mobile summary span{background:var(--white);width:22px;height:2px;display:block}.nav-mobile nav{background:var(--white);border-radius:var(--radius-lg);flex-direction:column;width:min(300px,100vw - 32px);padding:8px;display:flex;position:absolute;top:52px;right:0;box-shadow:0 18px 40px #0c101447}.nav-mobile nav a{color:var(--asphalt);border-radius:var(--radius);padding:12px 14px;font-weight:600;text-decoration:none}.nav-mobile nav a:hover{background:var(--paper)}.nav-mobile nav .nav-mobile-cta{background:var(--brand);color:var(--white);margin-bottom:4px}@media (min-width:640px){.header-cta{display:inline-flex}}@media (min-width:1020px){.nav-desktop{display:flex}.nav-mobile{display:none}}.site-footer{background:var(--asphalt);color:#c9ced4;border-top:3px solid var(--brand);margin-top:72px;font-size:17px}.footer-inner{max-width:var(--wrap);padding:48px var(--gutter) 24px;grid-template-columns:1fr;gap:32px;margin:0 auto;display:grid}@media (min-width:720px){.footer-inner{grid-template-columns:1.6fr 1fr 1fr 1fr}}.footer-brand{color:var(--white);font:700 22px/1 var(--font-display-stack);align-items:center;gap:10px;margin:0 0 12px;display:flex}.footer-about p{max-width:42ch;margin:0 0 12px}.footer-note{color:#9aa2ab;font-size:15.5px}.footer-head{color:var(--white);margin:0 0 10px;font-weight:700}.site-footer ul{margin:0;padding:0;list-style:none}.site-footer li{margin:0 0 6px}.site-footer a{color:#c9ced4;text-decoration:none}.site-footer a:hover{color:var(--white);text-decoration:underline}.footer-copy{max-width:var(--wrap);padding:16px var(--gutter) 32px;border-top:1px solid var(--asphalt-3);color:#9aa2ab;margin:0 auto;font-size:15.5px}.page-hero{background:var(--white);border-bottom:1px solid var(--line)}.page-hero-in{max-width:var(--wrap);padding:24px var(--gutter) 28px;margin:0 auto}.page-hero h1{max-width:24ch;margin:8px 0 12px;font-size:clamp(30px,5vw,46px)}.page-hero-sub{color:var(--muted);max-width:64ch}.page-hero-sub p{margin:0}.crumbs ol{color:var(--muted);flex-wrap:wrap;gap:4px 0;margin:0;padding:0;font-size:16px;list-style:none;display:flex}.crumbs li:not(:last-child):after{content:"/";color:#a5abb1;margin:0 8px}.crumbs li:last-child{text-overflow:ellipsis;white-space:nowrap;max-width:40ch;overflow:hidden}.crumbs a{color:var(--muted)}.hero-meta{flex-wrap:wrap;gap:8px;margin:16px 0 0;padding:0;font-size:16px;list-style:none;display:flex}.hero-meta li,p.hero-meta{background:var(--paper);border:1px solid var(--line);color:var(--muted);border-radius:999px;padding:4px 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a:hover{color:var(--brand);text-decoration:underline}.toc-inline{background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);margin:0 0 28px}.toc-inline summary{cursor:pointer;padding:14px 18px;font-weight:700}.toc-inline ol{padding:0 18px 14px}.toc-side{border-left:3px solid var(--line);max-height:calc(100vh - 110px);padding-left:18px;position:sticky;top:88px;overflow:auto}.toc-title{margin:0 0 8px;font-weight:700}.prose{font-size:18px}.prose>div>:first-child{margin-top:0}.prose h2{margin:48px 0 14px;font-size:clamp(26px,3.4vw,32px)}.prose h3{margin:32px 0 10px;font-size:23px}.prose h4{margin:24px 0 8px;font-size:19px}.prose p,.prose ul,.prose ol{margin:0 0 18px}.prose ul,.prose ol{padding-left:1.3em}.prose li{margin:0 0 8px}.prose li::marker{color:var(--muted)}.prose img{border-radius:var(--radius)}.prose figure{margin:24px 0}.prose figcaption{color:var(--muted);margin-top:6px;font-size:16px}.prose blockquote{border-left:4px solid var(--brand);color:var(--asphalt-2);margin:24px 0;padding:4px 0 4px 18px}.prose hr{border:0;border-top:1px solid var(--line);margin:32px 0}.table-scroll{border:1px solid var(--line);border-radius:var(--radius);background:var(--white);margin:0 0 24px;overflow-x:auto}.prose table{border-collapse:collapse;width:100%;min-width:480px;font-size:17px}.prose th,.prose td{text-align:left;border-bottom:1px solid var(--line);vertical-align:top;padding:10px 12px}.prose th{background:var(--paper);font-weight:700}.prose tr:last-child td{border-bottom:0}.small-print{color:var(--muted);font-size:16px;font-style:italic}.prose .elementor-widget-container>:last-child{margin-bottom:0}.prose .elementor-button{background:var(--brand);color:var(--white);border-radius:var(--radius);padding:10px 18px;font-weight:600;text-decoration:none;display:inline-block}.vf{grid-template-columns:1fr 1fr;gap:10px;display:grid}.vf-btn{border:2px solid var(--line);background:var(--white);border-radius:var(--radius);min-height:52px;font:700 19px/1 var(--font-body-stack);color:var(--asphalt);cursor:pointer;justify-content:center;align-items:center;gap:10px;transition:border-color .12s,background-color .12s,color .12s;display:inline-flex}.vf-btn:hover:not(:disabled){border-color:var(--asphalt)}.vf-btn.is-chosen{background:var(--asphalt);border-color:var(--asphalt);color:var(--white)}.vf-btn:disabled{cursor:default}.vf-btn:disabled:not(.is-chosen):not(.is-right){opacity:.5}.vf-btn.is-right{background:var(--green);border-color:var(--green);color:var(--white)}.vf-btn.is-chosen:disabled:not(.is-right){background:var(--red);border-color:var(--red);color:var(--white)}.vf-key{font:700 14px/1 var(--font-display-stack);opacity:.7;border:1.5px solid;border-radius:4px;padding:3px 6px}.vf-inline{max-width:340px}.vf-inline .vf-btn{min-height:44px;font-size:17px}.quiz{background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);margin:32px 0 40px;scroll-margin-top:80px;overflow:hidden}.quiz-head{background:var(--asphalt);color:var(--white);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px 20px;padding:18px 20px;display:flex}.quiz-title{font:700 22px/1.1 var(--font-display-stack);margin:0}.quiz-sub{color:#c9ced4;margin:4px 0 0;font-size:16px}.quiz-tools{flex-wrap:wrap;gap:8px;display:flex}.quiz-head .btn-ghost{color:var(--white);background:0 0;border-color:#fff6}.quiz-head .btn-ghost:hover{border-color:var(--white)}.quiz-progress{background:var(--asphalt-2);height:4px}.quiz-progress span{background:var(--brand);height:100%;transition:width .25s;display:block}.quiz-best{background:var(--brand-tint);color:var(--brand-dark);margin:0;padding:10px 20px;font-size:16px}.qlist{margin:0;padding:0;list-style:none}.qitem{border-top:1px solid var(--line);grid-template-columns:36px 1fr;gap:12px;padding:20px;display:grid}@media (max-width:480px){.qitem{grid-template-columns:22px 1fr;gap:8px;padding:16px 14px}.qnum{font-size:19px}}.qitem:first-child{border-top:0}.qitem.is-ok{background:linear-gradient(90deg, var(--green) 0 4px, transparent 4px)}.qitem.is-bad{background:linear-gradient(90deg, var(--red) 0 4px, transparent 4px)}.qnum{font:700 22px/1.35 var(--font-display-stack);color:var(--muted);text-align:right}.qbody{min-width:0}.qtopic{color:var(--muted);margin:0 0 2px;font-size:15.5px;font-weight:600}.qtext{margin:0 0 14px;font-size:18px;font-weight:600;line-height:1.45}.qanswer{margin-top:12px;font-size:17px}.qanswer summary{cursor:pointer;color:var(--muted);width:fit-content;font-weight:600}.is-ok .qanswer summary{color:var(--green)}.is-bad .qanswer summary{color:var(--red-dark)}.qanswer p{background:var(--paper);border-radius:var(--radius);margin:8px 0 0;padding:12px 14px}.quiz-end{border-top:1px solid var(--line);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:14px 20px;margin:0;padding:20px;display:flex}.quiz-end p{max-width:52ch;margin:0}.quiz-end.is-pass{background:var(--green-tint)}.quiz-end.is-fail{background:var(--red-tint)}.sign{object-fit:contain;background:var(--white);margin:0 0 12px;display:block}.exam{padding:16px;scroll-margin-top:80px}@media (min-width:640px){.exam{padding:24px}}.exam-bar{justify-content:space-between;align-items:center;gap:12px;margin-bottom:16px;display:flex}.exam-count{color:var(--muted);white-space:nowrap;font-size:17px}@media (max-width:480px){.exam-count{font-size:16px}.exam-clock{min-width:78px;font-size:24px}.exam-card{padding:16px}.exam-q{font-size:19px}}.exam-count strong{color:var(--asphalt);font-size:20px}.exam-clock{font:700 28px/1 var(--font-display-stack);font-variant-numeric:tabular-nums;border-radius:var(--radius);background:var(--asphalt);color:var(--white);text-align:center;min-width:92px;padding:6px 12px}.exam-card{border:2px solid var(--asphalt);border-radius:var(--radius-lg);background:var(--white);flex-direction:column;min-height:260px;padding:20px;display:flex}.exam-card .sign-lg{width:150px;height:150px;margin:0 auto 16px}.exam-q{flex:1;margin:0 0 24px;font-size:21px;font-weight:600;line-height:1.4}.exam-card .vf-btn{min-height:60px;font-size:20px}.exam-step{justify-content:space-between;margin-top:16px;display:flex}.exam-grid{grid-template-columns:repeat(10,minmax(0,44px));gap:6px;margin:20px 0 12px;display:grid}@media (max-width:480px){.exam-grid{grid-template-columns:repeat(10,minmax(0,1fr));gap:4px}}.cell{aspect-ratio:1;border:1.5px solid var(--line);background:var(--white);min-width:0;font:700 14px/1 var(--font-display-stack);color:var(--muted);cursor:pointer;border-radius:4px;padding:0}.cell.is-done{background:var(--asphalt-3);border-color:var(--asphalt-3);color:var(--white)}.cell.is-current{outline:3px solid var(--brand);outline-offset:1px}.exam-hint{color:var(--muted);margin:0 0 6px;font-size:16px}.exam-confirm{background:var(--paper);border:2px solid var(--asphalt);border-radius:var(--radius-lg);margin-bottom:16px;padding:16px}.exam-confirm p{margin:0 0 12px}.exam-actions{flex-wrap:wrap;gap:10px;display:flex}.exam-verdict{border-radius:var(--radius-lg);color:var(--white);margin-bottom:24px;padding:24px}.exam-verdict.is-pass{background:var(--green)}.exam-verdict.is-fail{background:var(--red)}.exam-verdict-word{font:700 clamp(40px, 8vw, 56px)/1 var(--font-display-stack);margin:0 0 8px}.exam-verdict-line{margin:0 0 6px;font-size:19px}.exam-verdict-sub{opacity:.9;margin:0 0 4px;font-size:17px}.exam-verdict .exam-actions{margin-top:16px}.exam-verdict .btn-primary{background:var(--white);color:var(--asphalt)}.exam-verdict .btn-ghost{color:var(--white);background:0 0;border-color:#ffffff8c}.review-head{flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:8px 16px;display:flex}.review-head h3{margin:0 0 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var(--line);border-radius:var(--radius-lg);margin-bottom:40px;scroll-margin-top:80px;overflow:hidden}.sim-intro{padding:24px}.sim-rules{grid-template-columns:repeat(3,1fr);gap:10px;margin:0 0 20px;padding:0;list-style:none;display:grid}.sim-rules li{background:var(--asphalt);color:#c9ced4;border-radius:var(--radius);text-align:center;padding:14px 12px;font-size:16px;line-height:1.3}.sim-rules strong{font:700 40px/1 var(--font-display-stack);color:var(--white);margin-bottom:4px;display:block}.sim-intro>p{max-width:60ch;margin:0 0 16px}.sim-best{color:var(--brand-dark);font-weight:600}.sim-noscript{color:var(--red-dark)}.home-hero{background:var(--asphalt);color:var(--white);padding-bottom:28px;position:relative}.home-hero:after{content:"";background:repeating-linear-gradient(90deg, var(--white) 0 56px, transparent 56px 96px);opacity:.85;height:6px;position:absolute;bottom:10px;left:0;right:0}.home-hero-in{max-width:var(--wrap);padding:40px var(--gutter) 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