.bb-body{--bb-ink: #162226;--bb-paper: #fffaf2;--bb-muted: #66777d;--bb-border: rgba(16, 34, 38, 0.12);--bb-accent: #ff7a59;--bb-accent-deep: #d24d29;--bb-accent-contrast: #162226;--bb-accent-soft: #ffe2d6;--bb-sky: #d9f0ff;--bb-leaf: #d8f3d7;--bb-sun: #fff0b8;--bb-shadow: 0 20px 45px rgba(27, 46, 51, 0.12);--bb-surface: rgba(255, 255, 255, 0.88);--bb-surface-strong: rgba(255, 250, 242, 0.92);--bb-panel: rgba(255, 250, 242, 0.98);--bb-input-bg: #fff;--bb-toggle-bg: rgba(255, 255, 255, 0.7);--bb-toggle-bg-active: #fff;background:radial-gradient(circle at top left, rgba(255,122,89,0.18), transparent 28%),radial-gradient(circle at top right, rgba(119,197,255,0.18), transparent 24%),linear-gradient(180deg, #fffdf9 0%, #fff7ef 100%);color:var(--bb-ink);color-scheme:light}[data-bs-theme="dark"] .bb-body{--bb-ink: #e7eef1;--bb-paper: #0f171c;--bb-muted: #a8b6bc;--bb-border: rgba(231, 238, 241, 0.14);--bb-accent: #ff8a67;--bb-accent-deep: #ffc0ab;--bb-accent-contrast: #162226;--bb-accent-soft: rgba(255, 138, 103, 0.18);--bb-sky: rgba(110, 188, 255, 0.18);--bb-leaf: rgba(110, 221, 162, 0.17);--bb-sun: rgba(255, 214, 102, 0.18);--bb-shadow: 0 20px 45px rgba(0, 0, 0, 0.38);--bb-surface: rgba(19, 28, 33, 0.9);--bb-surface-strong: rgba(15, 23, 28, 0.92);--bb-panel: rgba(15, 23, 28, 0.97);--bb-input-bg: rgba(13, 19, 23, 0.95);--bb-toggle-bg: rgba(19, 28, 33, 0.78);--bb-toggle-bg-active: rgba(31, 42, 48, 0.98);background:radial-gradient(circle at top left, rgba(255,122,89,0.14), transparent 28%),radial-gradient(circle at top right, rgba(119,197,255,0.12), transparent 24%),linear-gradient(180deg, #121b20 0%, #0c1317 100%);color:var(--bb-ink);color-scheme:dark}.bb-body main{min-height:60vh}.bb-shell{position:relative}.bb-brand-title,.bb-hero-title,.bb-section-title,.bb-card-title,.bb-page-title{font-family:"Sofia Sans Extra Condensed", "Avenir Next Condensed", "Helvetica Neue", sans-serif;letter-spacing:-0.04em}.bb-site-header{position:sticky;top:0;z-index:1030;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);background:var(--bb-surface-strong);border-bottom:1px solid var(--bb-border)}.bb-site-header .container{gap:1rem}.bb-site-header .navbar-brand{color:var(--bb-ink);-webkit-text-fill-color:var(--bb-ink);opacity:1;text-decoration:none}.bb-site-header .navbar-brand:hover,.bb-site-header .navbar-brand:focus{color:var(--bb-ink);-webkit-text-fill-color:var(--bb-ink)}.bb-brand-mark{width:2.4rem;height:2.4rem;border-radius:0.85rem;display:inline-grid;place-items:center;background:linear-gradient(135deg, #ff9c55, #ff5f5d);color:#fff;box-shadow:inset 0 1px 0 rgba(255,255,255,0.35)}.bb-site-header .navbar-brand>span:last-child{isolation:isolate}.bb-brand-title{color:var(--bb-ink);-webkit-text-fill-color:var(--bb-ink);opacity:1;line-height:0.9}.bb-site-header .bb-muted{color:var(--bb-muted);-webkit-text-fill-color:var(--bb-muted);opacity:1}.bb-site-header .navbar-toggler{border:1px solid rgba(16,34,38,0.16);border-radius:999px;padding:0.5rem 0.85rem;background:var(--bb-toggle-bg);color:var(--bb-ink);-webkit-appearance:none;appearance:none}[data-bs-theme="dark"] .bb-site-header .navbar-toggler{border-color:var(--bb-border)}.bb-site-header .navbar-toggler:focus{box-shadow:0 0 0 0.2rem rgba(255,122,89,0.2)}.bb-site-header .navbar-toggler-icon{width:1.45rem;height:1.45rem;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3E%3Cpath stroke='%23162226' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2.4' d='M5 8h20M5 15h20M5 22h20'/%3E%3C/svg%3E");background-position:center;background-repeat:no-repeat;background-size:100%;opacity:1}.bb-site-header .navbar-toggler[aria-expanded="true"]{background:var(--bb-toggle-bg-active);border-color:rgba(255,122,89,0.45)}.bb-site-nav-panel{align-items:center}.bb-site-header .collapse.navbar-collapse.show{background:var(--bb-panel);color:var(--bb-ink);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);box-shadow:var(--bb-shadow);border:1px solid var(--bb-border);border-radius:1.25rem}.bb-site-header .navbar-nav{gap:1.25rem}.bb-site-header .nav-item,.bb-site-header .bb-nav-link{color:var(--bb-ink) !important;-webkit-text-fill-color:var(--bb-ink) !important;white-space:nowrap}.bb-site-header .bb-nav-link,.bb-site-header .bb-nav-link:visited{color:var(--bb-ink);-webkit-text-fill-color:var(--bb-ink)}.bb-site-search{align-items:center;color:var(--bb-ink) !important;-webkit-text-fill-color:var(--bb-ink) !important}.bb-site-search label{color:var(--bb-ink) !important;-webkit-text-fill-color:var(--bb-ink) !important}.bb-site-search .bb-search-input{min-width:15rem;background:var(--bb-input-bg);color:var(--bb-ink);-webkit-text-fill-color:var(--bb-ink)}.bb-nav-link{color:var(--bb-ink);font-weight:600;text-decoration:none}.bb-nav-link:hover,.bb-nav-link:focus{color:var(--bb-accent-deep)}.bb-search-input{border-radius:999px;border:1px solid var(--bb-border);padding:0.75rem 1rem;background:var(--bb-input-bg);color:var(--bb-ink);-webkit-text-fill-color:var(--bb-ink)}.bb-filter-row{display:flex;flex-wrap:wrap;gap:0.85rem;align-items:center;justify-content:space-between}.bb-filter-select{min-width:16rem;border-radius:999px;border:1px solid var(--bb-border);padding:0.75rem 2.9rem 0.75rem 1rem;background-color:var(--bb-input-bg);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='none' stroke='%23162226' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.75' d='m3 6 5 5 5-5'/%3E%3C/svg%3E");background-position:right 1rem center;background-repeat:no-repeat;background-size:0.95rem;color:var(--bb-ink);-webkit-text-fill-color:var(--bb-ink);-webkit-appearance:none;appearance:none;cursor:pointer}[data-bs-theme="dark"] .bb-filter-select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='none' stroke='%23e7eef1' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.75' d='m3 6 5 5 5-5'/%3E%3C/svg%3E")}.bb-search-input:focus,.bb-filter-select:focus,.bb-search-submit:focus,.bb-cta-button:focus,.bb-card-link:focus,.bb-chip:focus,.bb-link-tile:focus{outline:3px solid rgba(255,122,89,0.35);outline-offset:2px}.bb-search-submit,.bb-cta-button{border:0;border-radius:999px;padding:0.8rem 1.2rem;font-weight:700}.bb-search-submit,.bb-cta-button-primary{background:var(--bb-accent);color:var(--bb-accent-contrast);-webkit-text-fill-color:var(--bb-accent-contrast)}.bb-cta-button-secondary{background:var(--bb-input-bg);color:var(--bb-ink);border:1px solid var(--bb-border)}.bb-hero{padding:4rem 0 2rem}.bb-hero-panel,.bb-card,.bb-surface,.bb-feature-box,.bb-practice-card{background:var(--bb-surface);border:1px solid var(--bb-border);border-radius:1.5rem;box-shadow:var(--bb-shadow)}.bb-hero-panel{overflow:hidden}.bb-hero-copy{padding:2rem}.bb-hero-title{font-size:clamp(3rem, 8vw, 5.9rem);line-height:0.92;margin-bottom:1rem}.bb-page-title{font-size:clamp(2.5rem, 6vw, 4.6rem);line-height:0.95}.bb-hero-kicker,.bb-subtitle,.bb-eyebrow{color:var(--bb-accent-deep);font-weight:700;text-transform:uppercase;letter-spacing:0.08em;font-size:0.82rem}.bb-hero-art{min-height:100%;background:radial-gradient(circle at 20% 20%, rgba(255,255,255,0.85), transparent 18%),linear-gradient(145deg, #ffd36b 0%, #ff8d5e 44%, #73d0ff 100%);color:#122730;padding:2rem;display:grid;gap:1rem;align-content:start}[data-bs-theme="dark"] .bb-hero-art{color:var(--bb-ink)}.bb-hero-art .bb-card,.bb-hero-art .bb-card-title,.bb-hero-art .bb-subtitle,.bb-hero-art p{color:var(--bb-ink);-webkit-text-fill-color:var(--bb-ink)}.bb-hero-gallery{display:grid;gap:1rem}.bb-hero-figure{display:grid;gap:0.85rem}.bb-hero-figure-frame{aspect-ratio:4 / 3;overflow:hidden;border-radius:1.15rem;border:1px solid rgba(18,39,48,0.18);background:rgba(255,255,255,0.42);box-shadow:inset 0 1px 0 rgba(255,255,255,0.38);touch-action:pan-y}.bb-hero-figure-frame:focus-visible{outline:0;border-color:rgba(18,39,48,0.36);box-shadow:0 0 0 0.22rem rgba(18,39,48,0.14),inset 0 1px 0 rgba(255,255,255,0.38)}.bb-hero-figure-image{width:100%;height:100%;display:block;object-fit:cover}.bb-hero-figure-caption{background:color-mix(in srgb, var(--bb-surface) 92%, white 8%);border:1px solid rgba(18,39,48,0.12);border-radius:1rem;padding:1rem}.bb-hero-gallery-controls{display:flex;gap:0.75rem;overflow-x:auto;padding-bottom:0.15rem}.bb-hero-gallery-nav{display:flex;gap:0.75rem}.bb-hero-gallery-step{appearance:none;border:1px solid rgba(18,39,48,0.16);background:rgba(255,255,255,0.54);color:var(--bb-ink);border-radius:999px;padding:0.7rem 1rem;font-weight:700;line-height:1;transition:transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease}.bb-hero-gallery-step:hover,.bb-hero-gallery-step:focus-visible{transform:translateY(-1px);border-color:rgba(18,39,48,0.32);box-shadow:0 0 0 0.2rem rgba(18,39,48,0.12)}.bb-hero-gallery-thumb{min-width:4.8rem;padding:0.35rem;background:rgba(255,255,255,0.38);border:1px solid rgba(18,39,48,0.16);border-radius:0.95rem;display:grid;gap:0.45rem;transition:transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease}.bb-hero-gallery-thumb:hover,.bb-hero-gallery-thumb:focus-visible{transform:translateY(-2px);border-color:rgba(18,39,48,0.32);box-shadow:0 0 0 0.2rem rgba(18,39,48,0.12)}.bb-hero-gallery-thumb.is-active{border-color:var(--bb-accent-deep);box-shadow:0 0 0 0.2rem rgba(18,39,48,0.14)}.bb-hero-gallery-thumb img{width:100%;aspect-ratio:1;display:block;object-fit:cover;border-radius:0.7rem}.bb-hero-gallery-thumb-label{font-size:0.78rem;font-weight:700;line-height:1.1}.bb-hero-panel-grid{display:grid;gap:1rem}[data-bs-theme="dark"] .bb-hero-figure-frame{border-color:rgba(255,255,255,0.14);background:rgba(15,23,28,0.48)}[data-bs-theme="dark"] .bb-hero-figure-frame:focus-visible{border-color:rgba(255,255,255,0.3);box-shadow:0 0 0 0.22rem rgba(255,255,255,0.1),inset 0 1px 0 rgba(255,255,255,0.06)}[data-bs-theme="dark"] .bb-hero-figure-caption,[data-bs-theme="dark"] .bb-hero-gallery-thumb,[data-bs-theme="dark"] .bb-hero-gallery-step{background:rgba(15,23,28,0.72);border-color:rgba(255,255,255,0.12)}[data-bs-theme="dark"] .bb-hero-gallery-thumb:hover,[data-bs-theme="dark"] .bb-hero-gallery-thumb:focus-visible,[data-bs-theme="dark"] .bb-hero-gallery-step:hover,[data-bs-theme="dark"] .bb-hero-gallery-step:focus-visible,[data-bs-theme="dark"] .bb-hero-gallery-thumb.is-active{box-shadow:0 0 0 0.2rem rgba(255,255,255,0.08)}.bb-bug-pill{display:inline-flex;align-items:center;gap:0.45rem;background:rgba(255,255,255,0.72);border-radius:999px;padding:0.45rem 0.8rem;font-weight:700}[data-bs-theme="dark"] .bb-bug-pill{background:rgba(15,23,28,0.72)}.bb-section{padding:1rem 0 2rem}.bb-section-title{font-size:clamp(2rem, 4vw, 3rem);line-height:0.96}.bb-card,.bb-feature-box,.bb-link-tile,.bb-glossary-row{padding:1.35rem;color:var(--bb-ink)}.bb-card button,button.bb-card{border:1px solid var(--bb-border);background:var(--bb-surface)}.bb-topic-card{height:100%}.bb-card-link,.bb-link-tile{color:inherit;text-decoration:none}.bb-card-link:hover,.bb-link-tile:hover{transform:translateY(-2px)}.bb-chip{display:inline-flex;align-items:center;gap:0.35rem;border-radius:999px;padding:0.3rem 0.75rem;background:var(--bb-accent-soft);color:var(--bb-accent-deep);font-size:0.85rem;font-weight:700;text-decoration:none}.bb-feature-box{border-left:8px solid var(--bb-accent)}.bb-warning-list li::marker{color:var(--bb-accent-deep)}.bb-badge-row{display:flex;flex-wrap:wrap;gap:0.5rem}.bb-badge{display:inline-flex;align-items:center;gap:0.4rem;padding:0.45rem 0.75rem;border-radius:999px;font-size:0.82rem;font-weight:700}.bb-badge-classrooms{background:var(--bb-sky)}.bb-badge-business{background:var(--bb-sun)}.bb-badge-life{background:var(--bb-leaf)}.bb-badge-fiction{background:#efe3ff}[data-bs-theme="dark"] .bb-badge-fiction{background:rgba(187,143,255,0.2)}.bb-definition-box{padding:1rem 1.2rem;border-radius:1.2rem;background:#102226;color:#fff}[data-bs-theme="dark"] .bb-definition-box{background:#162228;color:var(--bb-ink)}.bb-breadcrumbs ol{margin:0;padding:0;list-style:none;display:flex;flex-wrap:wrap;gap:0.5rem;color:var(--bb-muted)}.bb-breadcrumbs a{color:var(--bb-muted)}.bb-comparison-grid,.bb-topic-grid,.bb-path-grid,.bb-example-grid,.bb-story-grid,.bb-stats-grid{display:grid;gap:1rem}.bb-topic-grid,.bb-example-grid,.bb-story-grid{grid-template-columns:repeat(auto-fit, minmax(220px, 1fr))}.bb-path-grid,.bb-comparison-grid,.bb-stats-grid{grid-template-columns:repeat(auto-fit, minmax(260px, 1fr))}.bb-quick-compare{display:grid;gap:1rem;grid-template-columns:repeat(auto-fit, minmax(240px, 1fr))}.bb-search-results{display:grid;gap:1rem}.bb-result-count{color:var(--bb-muted)}.bb-stack-list p:last-child{margin-bottom:0}.bb-hidden{display:none}.bb-flashcard-front,.bb-flashcard-back{display:block}.bb-mini-practice-answer{background:color-mix(in srgb, var(--bb-surface) 90%, transparent);border-radius:1rem;padding:1rem;color:var(--bb-ink)}.bb-practice-card .bb-card-title{font-family:"Avenir Next", "Helvetica Neue", sans-serif;letter-spacing:-0.015em;line-height:1.25;font-size:clamp(1.2rem, 2vw, 1.6rem)}.bb-practice-option{-webkit-appearance:none;appearance:none;width:100%;display:block;text-align:left;padding:0.9rem 1rem;border-radius:1rem;border:1px solid var(--bb-border);background:var(--bb-input-bg);color:var(--bb-ink);-webkit-text-fill-color:var(--bb-ink);font-family:inherit;font-size:1.15rem;font-weight:500;line-height:1.35;white-space:normal}.bb-practice-option.is-correct{border-color:#2f7d4f;background:#e5f6e8;color:#163c25;-webkit-text-fill-color:#163c25}.bb-practice-option.is-wrong{border-color:#b4492e;background:#ffe9e0;color:#6f2415;-webkit-text-fill-color:#6f2415}.bb-practice-option:hover{border-color:rgba(16,34,38,0.28)}.bb-practice-option:focus{outline:3px solid rgba(255,122,89,0.35);outline-offset:2px}.bb-footer-band{padding:2rem 0 1rem}.bb-muted{color:var(--bb-muted)}[data-bs-theme="dark"] .bb-site-header .navbar-toggler-icon{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3E%3Cpath stroke='%23e7eef1' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2.4' d='M5 8h20M5 15h20M5 22h20'/%3E%3C/svg%3E")}@media (max-width: 991.98px){.bb-site-header .navbar-collapse{padding-top:1rem}.bb-hero{padding-top:2rem}.bb-hero-art{padding:1.25rem}.bb-hero-figure-frame{aspect-ratio:5 / 4}}@media (max-width: 1399.98px){.bb-site-nav-panel{margin-top:0.75rem;padding:1rem;border:1px solid var(--bb-border);border-radius:1.25rem;background:var(--bb-panel);box-shadow:var(--bb-shadow)}.bb-site-header .navbar-nav{gap:0.2rem;align-items:stretch}.bb-site-header .nav-item{width:100%}.bb-site-header .bb-nav-link{display:block;padding:0.65rem 0}.bb-site-header .bb-nav-link:hover,.bb-site-header .bb-nav-link:focus{color:var(--bb-accent-deep);-webkit-text-fill-color:var(--bb-accent-deep)}.bb-site-search{width:100%;margin-top:0.75rem}.bb-site-search .bb-search-input{min-width:0;width:100%}}@media (min-width: 1400px){.bb-site-nav-panel{gap:1.25rem}.bb-site-search{flex:0 1 21rem}}@media (min-width: 992px){.bb-hero-panel-grid{grid-template-columns:repeat(2, minmax(0, 1fr))}.bb-hero-gallery-thumb{min-width:0;flex:1 1 0}}@media (prefers-reduced-motion: reduce){.bb-hero-gallery-thumb{transition:none}}

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