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0;color:var(--mui-text-primary);font-size:1.25rem;font-weight:400}.lead,.intro-copy,.section-copy{max-width:68ch;color:var(--mui-text-secondary)}.lead{font-size:1rem}.hero-actions{display:flex;flex-wrap:wrap;gap:var(--space-1);margin-top:var(--space-3)}.button,.resource-link{display:inline-flex;justify-content:center;align-items:center;width:fit-content;min-height:2.25rem;padding:.375rem var(--space-2);border:1px solid transparent;border-radius:var(--shape-radius);font-size:.875rem;font-weight:500;line-height:1.75;text-align:center;text-decoration:none;text-transform:uppercase;transition:background-color .15s ease,border-color .15s ease,box-shadow .15s ease,color .15s ease}.button:hover,.resource-link:hover,.button:focus-visible,.resource-link:focus-visible{text-decoration:none}.button--primary,.resource-link{background:var(--mui-primary-main);color:#fff;box-shadow:var(--shadow-2)}.button--primary:hover,.resource-link:hover{background:var(--mui-primary-dark);color:#fff;box-shadow:var(--shadow-4)}.button--secondary{border-color:#003f3f80;background:transparent;color:var(--mui-primary-main)}.button--secondary:hover,.button--secondary:focus-visible{border-color:var(--mui-primary-main);background:var(--mui-action-hover);color:var(--mui-primary-main)}.info-panel{padding:var(--space-3);border:1px solid var(--mui-divider);border-radius:var(--shape-radius);background:var(--mui-background-paper)}.info-panel h2{margin-bottom:var(--space-2);font-size:1.5rem}.info-panel dl{margin:0;display:grid;gap:var(--space-2)}.info-panel dt{color:var(--mui-text-secondary);font-size:.875rem}.info-panel dd{margin:.125rem 0 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p{margin:0}.revision-link-list{margin:0;padding:0;list-style:none}.revision-link-list{display:grid;gap:var(--space-1)}.revision-link-list a{font-weight:500}.definition-chip-list{display:flex;flex-wrap:wrap;gap:var(--space-0-5)}.definition-list,.definition-chip-list{margin:0;padding:0;list-style:none}.definition-list{display:grid;gap:var(--space-1)}.definition-chip-list li{max-width:100%}.definition-disclosure{border:1px solid var(--mui-divider);border-radius:var(--shape-radius);background:var(--mui-background-paper);color:var(--mui-text-secondary);overflow:hidden}.definition-disclosure--chip{max-width:min(100%,22rem);border-radius:var(--shape-radius-chip);font-size:.8125rem;font-weight:500}.definition-disclosure[open]{border-radius:var(--shape-radius);color:var(--mui-text-primary)}.definition-disclosure summary{padding:var(--space-1);cursor:pointer;color:var(--mui-text-secondary);font-weight:500;list-style:none}.definition-disclosure--chip summary{padding:.1875rem var(--space-1)}.definition-disclosure summary::-webkit-details-marker{display:none}.definition-disclosure summary:after{content:"+";margin-left:var(--space-0-5);color:var(--mui-primary-main)}.definition-disclosure[open] summary{border-bottom:1px solid var(--mui-divider);color:var(--mui-primary-main)}.definition-disclosure[open] summary:after{content:"-"}.definition-disclosure p{padding:var(--space-1);color:var(--mui-text-primary);font-weight:400;line-height:1.5}.revision-stat-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--space-1);margin:0}.revision-stat-list div{padding:var(--space-1);border:1px solid var(--mui-divider);border-radius:var(--shape-radius);background:var(--mui-background-default)}.revision-stat-list dt{color:var(--mui-text-secondary);font-size:.8125rem}.revision-stat-list dd{margin:var(--space-0-5) 0 0;color:var(--mui-primary-main);font-size:1.5rem;font-weight:500}.lesson-sequence,.topic-map{position:relative;display:grid;gap:var(--space-3)}.lesson-sequence:before,.topic-map:before{content:"";position:absolute;top:.75rem;bottom:.75rem;width:2px;background:linear-gradient(180deg,#003f3f14,#003f3f38,#003f3f14);pointer-events:none;z-index:0}.topic-map:before{left:2.25rem}.lesson-sequence:before{left:2.45rem}.lesson-card-shell,.topic-card-shell{position:relative;z-index:1;padding:0;overflow:hidden;transition:box-shadow .15s ease,background-color .15s ease}.lesson-card-shell:hover,.topic-card-shell:hover{box-shadow:var(--shadow-4)}.lesson-card-shell--disabled:hover{box-shadow:var(--shadow-1)}.lesson-card-shell:focus-within,.topic-card-shell:focus-within{box-shadow:var(--shadow-4),0 0 0 3px var(--mui-action-focus)}.lesson-card,.topic-card{position:relative;display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:var(--space-1) var(--space-2);align-items:start;min-height:4.5rem;padding:var(--space-2);color:inherit;text-decoration:none;transition:background-color .15s ease}.lesson-card:hover,.lesson-card:focus-visible,.topic-card:hover,.topic-card:focus-visible{background:var(--mui-action-hover);color:inherit;text-decoration:none}.lesson-card h3,.topic-card 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var(--space-1);border-radius:var(--shape-radius);color:var(--mui-primary-main);font-size:.875rem;font-weight:500;line-height:1.75;text-decoration:none;text-transform:uppercase;white-space:nowrap}.lesson-card__link:after,.topic-card__link:after{content:">";margin-left:var(--space-0-5)}.lesson-page-nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--space-2)}.lesson-page-nav__link{display:grid;gap:var(--space-0-5);align-content:start;min-width:0;min-height:6rem;padding:var(--space-2);border:1px solid var(--mui-divider);border-radius:var(--shape-radius);background:var(--mui-background-paper);color:inherit;text-decoration:none;box-shadow:var(--shadow-1);transition:background-color .15s ease,border-color .15s ease,box-shadow .15s ease}.lesson-page-nav__link:hover,.lesson-page-nav__link:focus-visible{border-color:#003f3f80;background:var(--mui-action-hover);color:inherit;text-decoration:none;box-shadow:var(--shadow-4)}.lesson-page-nav__link:focus-visible{outline:3px 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