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12%,var(--semantic-surface)));--l2-contrast:var(--lsc-contrast,var(--semantic-text-primary));--l2-card-bg:var(--bg-card,var(--theme-card-bg,var(--semantic-surface)))}.nn-l2-card{position:relative;border-radius:20px;border:1px solid color-mix(in srgb,var(--l2-accent) 22%,var(--semantic-border-soft));background:color-mix(in srgb,var(--l2-soft) 34%,var(--l2-card-bg) 66%);padding:clamp(1.1rem,2vw,1.5rem);box-shadow:0 1px 2px color-mix(in srgb,var(--semantic-text-primary) 6%,transparent),0 10px 28px -18px color-mix(in srgb,var(--semantic-text-primary) 24%,transparent)}.nn-l2-card:before{content:"";position:absolute;inset:0 auto 0 0;width:4px;border-radius:20px 0 0 20px;background:var(--l2-accent);opacity:.9}.nn-l2-head{display:flex;align-items:center;gap:10px;margin-bottom:12px}.nn-l2-ico{width:32px;height:32px;border-radius:9px;flex:none;display:grid;place-items:center;color:#fff;background:var(--l2-accent)}.nn-l2-ico svg{width:17px;height:17px}.nn-l2-title{font-size:clamp(1rem,1.1vw,1.18rem);font-weight:800;color:var(--semantic-text-primary);margin:0;letter-spacing:-.01em}.nn-l2-banner{display:inline-flex;align-items:center;gap:6px;padding:4px 11px;border-radius:999px;font-size:.7rem;font-weight:800;letter-spacing:.04em;text-transform:uppercase;color:#fff;background:var(--l2-accent)}.nn-l2-body{color:var(--semantic-text-secondary);font-size:.95rem;line-height:1.6}.nn-l2-body b,.nn-l2-body strong{color:var(--semantic-text-primary)}.nn-l2-bullets{margin:0;padding-left:1.1rem;display:grid;gap:7px}.nn-l2-section-title{display:flex;align-items:center;gap:10px;font-size:clamp(1.3rem,2.4vw,1.75rem);font-weight:800;color:var(--semantic-text-primary);margin:6px 0 2px;letter-spacing:-.02em}.nn-l2-section-title .nn-l2-bar{width:28px;height:4px;border-radius:3px;flex:none;background:var(--semantic-brand)}.nn-lesson-section-hero{position:relative}.nn-lesson-section-hero__icon{display:inline-flex;width:2.25rem;height:2.25rem;flex:0 0 auto;align-items:center;justify-content:center;border-radius:.75rem;color:var(--lsc-contrast,var(--l2-contrast,var(--semantic-text-primary)));background:color-mix(in srgb,var(--lsc-color,var(--l2-accent,var(--semantic-brand))) 16%,var(--bg-card,var(--theme-card-bg,#fff)));border:1px solid color-mix(in srgb,var(--lsc-color,var(--l2-accent,var(--semantic-brand))) 26%,var(--semantic-border-soft));box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--lsc-color,var(--l2-accent,var(--semantic-brand))) 8%,transparent)}.nn-lesson-section-hero__icon>svg{width:1.125rem;height:1.125rem}.nn-lesson-section-heading{margin:0;font-size:clamp(1.125rem,.55vw + 1rem,1.35rem);font-weight:600;letter-spacing:-.02em;line-height:1.32}.nn-lesson-page-header{padding-block:clamp(1.35rem,2.6vw,2rem) clamp(1rem,2vw,1.4rem);padding-inline:clamp(1.5rem,4vw,2.75rem)}.nn-l2-grid{display:grid;gap:clamp(1rem,2vw,1.5rem);grid-template-columns:repeat(auto-fit,minmax(280px,1fr));align-items:stretch}.nn-l2-grid>*{height:100%}.nn-l2-q{font-weight:700;color:var(--semantic-text-primary);margin:0 0 12px}.nn-l2-opts{display:grid;gap:9px}.nn-l2-opt{display:flex;align-items:center;gap:11px;padding:11px 14px;border-radius:14px;border:1px solid color-mix(in srgb,var(--l2-accent) 22%,var(--semantic-border-soft));background:color-mix(in srgb,var(--l2-card-bg) 78%,transparent);font-size:.92rem;color:var(--semantic-text-secondary);text-align:left;width:100%;cursor:pointer;font-family:inherit;transition:transform .12s ease,box-shadow .15s ease,border-color .15s ease;min-height:44px}.nn-l2-opt:hover{transform:translateX(3px);box-shadow:0 8px 20px -14px color-mix(in srgb,var(--semantic-text-primary) 40%,transparent)}.nn-l2-opt:focus-visible{outline:2px solid var(--l2-accent);outline-offset:2px}.nn-l2-opt .nn-l2-key{width:24px;height:24px;border-radius:7px;flex:none;display:grid;place-items:center;font-weight:800;font-size:.78rem;color:var(--semantic-text-primary);background:color-mix(in srgb,var(--l2-accent) 18%,var(--l2-card-bg));border:1px solid color-mix(in srgb,var(--l2-accent) 30%,var(--semantic-border-soft))}.nn-l2-opt[data-state=correct]{background:color-mix(in srgb,var(--lesson-interventions-accent,#16a34a) 14%,var(--l2-card-bg));border-color:var(--lesson-interventions-accent,#16a34a);color:var(--semantic-text-primary)}.nn-l2-opt[data-state=correct] .nn-l2-key{background:var(--lesson-interventions-accent,#16a34a);color:#fff;border-color:var(--lesson-interventions-accent,#16a34a)}.nn-l2-opt[data-state=wrong]{background:color-mix(in srgb,var(--lesson-red-flags-accent,#e11d48) 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color-mix(in srgb,var(--l2-accent) 45%,var(--semantic-border-soft));border-radius:999px;padding:4px 9px;white-space:nowrap;pointer-events:none}.nn-l2-annot .nn-l2-dot{width:8px;height:8px;border-radius:50%;background:var(--l2-accent);flex:none}.nn-l2-cap{padding:10px 14px;font-size:.85rem;color:var(--semantic-text-muted,var(--semantic-text-secondary))}.nn-l2-case-scenario{font-size:.92rem;line-height:1.6;color:var(--semantic-text-secondary);white-space:pre-line}.nn-l2-case-prompt{margin-top:12px;font-weight:700;color:var(--semantic-text-primary)}@media (max-width:720px){.nn-l2-split{grid-template-columns:1fr}.nn-l2-step{flex:1 1 100%}}.nn-lesson-page :where(.nn-lesson-article-flow.nn-lesson-article-grid){display:grid;gap:clamp(.65rem,1.35vw,1rem);align-items:start}.nn-lesson-page :where(.nn-lesson-article-flow.nn-lesson-article-grid)>*{grid-column:1/-1;min-width:0}.nn-lesson-page :where(.nn-l2){gap:clamp(.75rem,1.45vw,1.05rem)}.nn-lesson-page :where(.nn-l2-grid){display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(.65rem,1.2vw,.9rem)}.nn-lesson-page :where(.nn-l2-grid>*){grid-column:span 4;min-width:0}.nn-lesson-page :where(.nn-l2-grid>:nth-child(3n+1)){grid-column:span 5}.nn-lesson-page :where(.nn-l2-grid>:nth-child(3n+2)){grid-column:span 4}.nn-lesson-page :where(.nn-l2-grid>:nth-child(3n+3)){grid-column:span 3}.nn-lesson-page :where(.nn-lesson-section-card,.nn-l2-card){border-radius:14px;box-shadow:0 1px 2px color-mix(in srgb,var(--semantic-text-primary) 5%,transparent)}.nn-lesson-page :where(.nn-lesson-section-card){border-color:color-mix(in srgb,var(--lsc-color,var(--semantic-brand)) 24%,var(--semantic-border-soft));background:linear-gradient(90deg,color-mix(in srgb,var(--lsc-soft,var(--semantic-brand)) 62%,transparent) 0,transparent 56%),color-mix(in srgb,var(--bg-card,var(--theme-card-bg)) 88%,var(--lsc-soft,var(--semantic-brand)) 12%);padding:clamp(.95rem,1.45vw,1.2rem)}.nn-lesson-page 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rgba(13,57,84,.12),0 16px 40px -20px rgba(13,57,84,.22)}.editorial-grid img,.lesson-compact-row img,.lesson-split-layout img{max-width:100%;height:auto;border-radius:12px}@media (max-width:767px){.editorial-grid,.lesson-compact-row,.lesson-split-layout{grid-template-columns:1fr}.editorial-grid>*,.lesson-compact-row>*{grid-column:span 1!important}}@media (max-width:980px){.l2-atlas{grid-template-columns:1fr}.l2-atlas-rail{position:static;display:block;border-left:0;border-bottom:1px solid color-mix(in srgb,var(--theme-primary,#168cc7) 18%,transparent);padding:0 0 .65rem}.l2-atlas-rail nav{display:flex;gap:.45rem;overflow-x:auto;padding-bottom:.2rem}.l2-rail-link{min-width:150px}}@media (max-width:720px){.l2-briefing,.l2-briefing-panel{grid-template-columns:1fr}.l2-briefing-panel{border-left:0;border-top:1px solid color-mix(in srgb,var(--theme-primary,#168cc7) 18%,transparent);grid-template-columns:repeat(3,1fr);padding:.7rem 0 0}.l2-band{padding:.8rem}.l2-float-figure{float:none;width:100%;margin:0 0 .75rem}}.l2-grid-feature{gap:clamp(.75rem,1.5vw,1.05rem)}.l2-grid-feature,.l2-grid-strip{display:grid;grid-template-columns:1fr}.l2-grid-strip{gap:clamp(.65rem,1.3vw,.95rem)}.l2-grid-wide{grid-template-columns:1fr}.l2-grid-even,.l2-grid-wide{display:grid;gap:clamp(1rem,2vw,1.5rem)}.l2-grid-even{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}.l2-band-ngn{background:color-mix(in srgb,var(--lesson-ngn-bg,#eef1f8) 70%,transparent);border:1px solid color-mix(in srgb,var(--lesson-ngn-border,#5f78b0) 16%,transparent)}.l2-band-review{background:color-mix(in srgb,var(--theme-card-bg,#fff) 86%,var(--theme-primary,#168cc7) 5%)}.l2-band-foundation .l2-grid-feature>.l2-card{border:0;background:transparent;box-shadow:none;padding:0}.l2-band-foundation .l2-grid-feature>.l2-card:before{display:none}.l2-band-foundation .l2-grid-feature>.l2-card .l2-body{font-size:clamp(.98rem,1.25vw,1.06rem);line-height:1.68;max-width:82ch}.l2-card--shell{padding:0}.l2-card--shell:before{inset:.9rem auto .9rem 0}.l2-card--shell .nn-lesson-section-card{border:0!important;background:transparent!important;box-shadow:none!important;margin:0!important}.l2-card--shell>*>.nn-lesson-section-card,.l2-card--shell>.nn-lesson-section-card{padding:clamp(.85rem,1.45vw,1.1rem)!important}