.search-box{min-width:0;position:relative}.search-box__label{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.search-box__input{width:100%;font:inherit;font-size:var(--text-sm);color:var(--color-text);background:var(--color-bg-raised);border:1px solid var(--color-border);border-radius:var(--radius-full);padding:var(--space-1) var(--space-4)}.search-box__results{top:calc(100% + var(--space-1));padding:var(--space-1);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);box-shadow:var(--shadow-md);z-index:60;max-height:20rem;margin:0;list-style:none;position:absolute;left:0;right:0;overflow-y:auto}.search-box__hit{padding:var(--space-1) var(--space-3);border-radius:var(--radius-sm);color:var(--color-text);flex-direction:column;gap:0;display:flex}.search-box__hit:hover,.search-box__hit--active{background:var(--color-bg-raised);text-decoration:none}.search-box__hit-title{font-weight:600;font-size:var(--text-sm)}.search-box__hit-meta{font-size:var(--text-xs);color:var(--color-text-muted)}.search-box__empty{top:calc(100% + var(--space-1));padding:var(--space-2) var(--space-3);font-size:var(--text-sm);color:var(--color-text-muted);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);z-index:60;margin:0;position:absolute;left:0;right:0}.navbar{z-index:50;height:var(--navbar-height);background-color:color-mix(in srgb, var(--color-surface) 82%, transparent);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--color-border);position:sticky;top:0}.navbar__inner{height:var(--navbar-height);align-items:center;gap:var(--space-3);display:flex}.navbar__brand{font-family:var(--font-display);letter-spacing:-.01em;font-weight:600;font-size:var(--text-lg);color:var(--color-text);white-space:nowrap;margin-right:auto}.navbar__brand:hover{text-decoration:none}.navbar__brand-accent{color:var(--color-accent);font-style:italic;font-weight:400}.navbar__menu-button{border:1px solid var(--color-border);border-radius:var(--radius-md);color:var(--color-text);padding:var(--space-1) var(--space-3);font-size:var(--text-lg);background:0 0;line-height:1.4}.navbar__nav{display:none}.navbar__nav--open{top:var(--navbar-height);background-color:var(--color-surface);border-bottom:1px solid var(--color-border);padding:var(--space-2) var(--space-4) var(--space-4);flex-direction:column;gap:0;display:flex;position:absolute;left:0;right:0}.navbar__link{padding:var(--space-2) var(--space-2);color:var(--color-text-muted);border-radius:var(--radius-md);font-size:var(--text-base);position:relative}.navbar__link:hover{color:var(--color-text);background-color:var(--color-bg-raised);text-decoration:none}.navbar__link--active{color:var(--color-text);font-weight:600}.navbar__link--active:after{content:"";left:var(--space-2);right:var(--space-2);background-color:var(--color-accent);border-radius:2px;height:2px;position:absolute;bottom:2px}.navbar__search{padding:var(--space-2)}.navbar__theme-toggle{border:1px solid var(--color-border);border-radius:var(--radius-full);background:var(--color-bg-raised);width:56px;height:28px;color:var(--color-text-muted);padding:0;flex-shrink:0;justify-content:space-between;align-items:center;padding-inline:6px;display:inline-flex;position:relative}.navbar__theme-toggle:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}.navbar__theme-icon{line-height:0;display:inline-flex}.navbar__theme-thumb{background:var(--color-surface);border:1px solid var(--color-border);width:22px;height:22px;box-shadow:var(--shadow-sm);border-radius:50%;transition:transform .25s,background-color .25s;position:absolute;top:2px;left:3px}.navbar__theme-toggle--light .navbar__theme-thumb{transform:translate(0)}.navbar__theme-toggle--system .navbar__theme-thumb{background:var(--color-accent-soft);border-color:var(--color-accent);transform:translate(13px)}.navbar__theme-toggle--dark .navbar__theme-thumb{transform:translate(26px)}@media (width>=48rem){.navbar__menu-button{display:none}.navbar__nav{align-items:center;gap:var(--space-1);flex-direction:row;display:flex}.navbar__nav--open{border-bottom:none;padding:0;position:static}.navbar__link{padding:var(--space-1) var(--space-3);font-size:var(--text-sm)}.navbar__search{flex-shrink:1;width:10rem;min-width:0;padding:0}}@media (width>=64rem){.navbar__search{width:15rem}}.sidebar{display:none}@media (width>=64rem){.sidebar{top:calc(var(--navbar-height) + var(--space-6));border:1px solid var(--color-border);border-radius:var(--radius-lg);min-width:12rem;padding:var(--space-4);background-color:var(--color-surface);box-shadow:var(--shadow-sm);align-self:start;display:block;position:sticky}.sidebar__section+.sidebar__section{margin-top:var(--space-4)}.sidebar__heading{font-size:var(--text-xs);font-variant:small-caps;text-transform:uppercase;letter-spacing:.08em;color:var(--color-text-muted);margin:0 0 var(--space-2)}.sidebar__list{gap:var(--space-1);flex-direction:column;margin:0;padding:0;list-style:none;display:flex}.sidebar__link{padding:var(--space-1) var(--space-2);border-radius:var(--radius-md);color:var(--color-text-muted);font-size:var(--text-sm);border-left:2px solid #0000;display:block}.sidebar__link:hover{color:var(--color-text);background-color:var(--color-bg-raised);text-decoration:none}.sidebar__link--active{color:var(--color-text);background-color:var(--color-accent-soft);border-left-color:var(--color-accent);font-weight:600}.sidebar__note{margin:var(--space-4) 0 0;font-size:var(--text-xs);color:var(--color-text-muted)}}.footer{border-top:1px solid var(--color-border);background-color:var(--color-surface);margin-top:var(--space-10)}.footer__inner{padding-block:var(--space-6);gap:var(--space-1);flex-direction:column;align-items:center;display:flex}.footer__text{font-size:var(--text-sm);color:var(--color-text-muted);text-align:center;margin:0}.footer__brand{font-family:var(--font-display);color:var(--color-accent);font-style:italic}.page-shell{display:block}.page-shell__header{margin-bottom:var(--space-6)}.page-shell__title{font-family:var(--font-display);letter-spacing:-.01em;font-size:var(--text-2xl);margin:0 0 var(--space-2);line-height:1.2}.page-shell__desc{color:var(--color-text-muted);font-size:var(--text-base);margin:0}@media (width>=64rem){.page-shell{gap:var(--space-8);grid-template-columns:1fr 14rem;align-items:start;display:grid}.page-shell__title{font-size:var(--text-3xl)}}.ui-card{border:1px solid var(--color-border);border-radius:var(--radius-lg);background-color:var(--color-surface);padding:var(--space-4);margin-bottom:var(--space-4);box-shadow:var(--shadow-sm)}.ui-card__title{margin:0 0 var(--space-3);font-size:var(--text-lg);font-family:var(--font-display);letter-spacing:-.01em}.ui-card__body{color:var(--color-text)}.ui-badge{padding:var(--space-1) var(--space-3);border-radius:var(--radius-full);font-size:var(--text-xs);letter-spacing:.02em;background:var(--color-badge-bg);color:var(--color-badge-text);border:1px solid var(--color-border);white-space:nowrap;font-weight:600;display:inline-block}.ui-badge--success{background:color-mix(in srgb, var(--color-success) 12%, transparent);border-color:color-mix(in srgb, var(--color-success) 30%, transparent);color:var(--color-success)}.ui-badge--warning{background:color-mix(in srgb, var(--color-warning) 12%, transparent);border-color:color-mix(in srgb, var(--color-warning) 30%, transparent);color:var(--color-warning)}.ui-badge--danger{background:color-mix(in srgb, var(--color-danger) 12%, transparent);border-color:color-mix(in srgb, var(--color-danger) 30%, transparent);color:var(--color-danger)}.ui-badge--info{background:color-mix(in srgb, var(--color-info) 12%, transparent);border-color:color-mix(in srgb, var(--color-info) 30%, transparent);color:var(--color-info)}.ui-tabs__list{gap:var(--space-2);margin-bottom:var(--space-3);flex-wrap:wrap;display:flex}.ui-tabs__tab{color:var(--color-text-muted);border-radius:var(--radius-full);padding:var(--space-1) var(--space-4);font-size:var(--text-sm);background:0 0;border:1px solid #0000}.ui-tabs__tab:hover{color:var(--color-text);background:var(--color-bg-raised)}.ui-tabs__tab--active{background:var(--color-accent-soft);border-color:var(--color-accent);color:var(--color-accent);font-weight:600}.ui-tabs__panel{border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--space-4);background:var(--color-surface)}.ui-codeblock{margin:0 0 var(--space-4);border:1px solid var(--color-border);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);background:var(--color-surface-2);overflow:hidden}.ui-codeblock__header{padding:var(--space-2) var(--space-4);border-bottom:1px solid var(--color-border);font-size:var(--text-sm);background:0 0;justify-content:space-between;align-items:center;display:flex}.ui-codeblock__title{font-weight:600;font-family:var(--font-display);letter-spacing:-.01em}.ui-codeblock__lang{color:var(--color-text-muted);font-size:var(--text-xs);text-transform:uppercase;font-family:var(--font-mono)}.ui-codeblock__actions{align-items:center;gap:var(--space-3);display:inline-flex}.ui-codeblock__copy{border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface);color:var(--color-text);padding:var(--space-1) var(--space-2);font-size:var(--text-xs)}.ui-codeblock__copy:hover{border-color:var(--color-accent);color:var(--color-accent)}.ui-codeblock__copy:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}.ui-codeblock__desc{padding:var(--space-2) var(--space-4);border-bottom:1px solid var(--color-border);font-size:var(--text-sm);color:var(--color-text-muted);margin:0}.ui-codeblock__pre{padding:var(--space-4) var(--space-4) var(--space-4) 0;color:var(--tok-plain);background:0 0;margin:0;overflow-x:auto}.ui-codeblock__pre code{font-family:var(--font-mono);counter-reset:code-line}.ui-code-line{white-space:pre;min-height:1.6em;display:block}.ui-code-line:before{counter-increment:code-line;content:counter(code-line);width:var(--space-6);margin-right:var(--space-4);text-align:right;color:var(--color-text-muted);opacity:.6;-webkit-user-select:none;user-select:none;display:inline-block}.tok-keyword{color:var(--tok-keyword)}.tok-string,.tok-char{color:var(--tok-string)}.tok-comment{color:var(--tok-comment);font-style:italic}.tok-number{color:var(--tok-number)}.tok-annotation{color:var(--tok-annotation)}.ui-table-wrap{border:1px solid var(--color-border);border-radius:var(--radius-md);margin-bottom:var(--space-4);box-shadow:var(--shadow-sm);background:var(--color-surface);overflow-x:auto}.ui-table{border-collapse:collapse;width:100%;font-size:var(--text-sm);background:var(--color-surface)}.ui-table__caption{text-align:left;padding:var(--space-3) var(--space-4);font-weight:600;font-family:var(--font-display);caption-side:top}.ui-table th,.ui-table td{padding:var(--space-2) var(--space-4);border-top:1px solid var(--color-border);text-align:left}.ui-table tbody tr:hover{background:var(--color-accent-soft)}.ui-table thead th{background:var(--color-surface-2);color:var(--color-text-muted);font-size:var(--text-xs);text-transform:uppercase;letter-spacing:.05em;border-top:none}.hero{background:radial-gradient(ellipse 60% 50% at 50% 0%, var(--color-accent-soft), transparent 70%), var(--color-bg-raised);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-6) var(--space-4);margin-bottom:var(--space-6);box-shadow:var(--shadow-sm)}.hero__title{margin:0 0 var(--space-2);font-size:var(--text-2xl);line-height:1.2}.hero__text{margin:0 0 var(--space-4);color:var(--color-text-muted);max-width:36rem}.hero__actions{gap:var(--space-3);flex-wrap:wrap;display:flex}.hero__cta{background:var(--color-primary);color:var(--color-primary-contrast);padding:var(--space-2) var(--space-6);border-radius:var(--radius-full);font-weight:600;display:inline-block}.hero__cta:hover{background:var(--color-primary-hover);text-decoration:none}.hero__secondary{border:1px solid var(--color-border);padding:var(--space-2) var(--space-6);border-radius:var(--radius-full);color:var(--color-text);display:inline-block}.hero__secondary:hover{border-color:var(--color-primary);text-decoration:none}.home-section-title{margin:var(--space-8) 0 var(--space-3);font-size:var(--text-xl)}.home-cards{gap:var(--space-4);grid-template-columns:1fr;display:grid}.learning-path{gap:var(--space-2);flex-wrap:wrap;align-items:center;margin:0;padding:0;list-style:none;display:flex}.learning-path__step a{font-size:var(--text-sm);border:1px solid var(--color-border);border-radius:var(--radius-full);padding:var(--space-1) var(--space-3);background:var(--color-surface);color:var(--color-text);display:inline-block}.learning-path__step a:hover{border-color:var(--color-primary);color:var(--color-primary);text-decoration:none}.learning-path__step+.learning-path__step:before{content:"→";margin-right:var(--space-2);color:var(--color-text-muted)}@media (width>=48rem){.hero__title{font-size:var(--text-3xl)}.home-cards{grid-template-columns:repeat(2,1fr)}}.viz-player{border:1px solid var(--color-border);border-radius:var(--radius-lg);background:var(--color-surface);padding:var(--space-4);margin-bottom:var(--space-4)}.viz-player:focus-visible{outline:2px 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var(--color-border);border-radius:var(--radius-md);background:var(--color-bg-raised);color:var(--color-text);padding:var(--space-1) var(--space-3);font-size:var(--text-sm)}.viz-player__controls button:disabled{opacity:.45;cursor:not-allowed}.viz-player__speed{align-items:center;gap:var(--space-2);font-size:var(--text-sm);color:var(--color-text-muted);margin-left:auto;display:inline-flex}.viz-player__speed input[type=range]{width:6rem;accent-color:var(--color-primary)}.viz-player__speed-value{font-variant-numeric:tabular-nums;min-width:2.5rem;color:var(--color-text)}.viz-player__count{font-size:var(--text-sm);color:var(--color-text-muted);font-variant-numeric:tabular-nums}.viz-player__desc{margin:var(--space-3) 0 0;font-size:var(--text-sm);color:var(--color-text-muted)}.viz-svg{max-width:100%;height:auto;display:block;overflow:visible}.viz-anim{transition:transform .3s,opacity .3s}.viz-cell rect,.viz-node circle,.viz-bar rect{transition:fill .3s,stroke .3s,opacity .3s}.viz-tone-default rect,.viz-tone-default circle{fill:var(--viz-default-fill);stroke:var(--viz-default-stroke);stroke-width:2px}.viz-tone-active rect,.viz-tone-active circle{fill:var(--viz-active-fill);stroke:var(--viz-active-stroke);stroke-width:2.5px}.viz-tone-compared rect,.viz-tone-compared circle{fill:var(--viz-compared-fill);stroke:var(--viz-compared-stroke);stroke-width:2.5px}.viz-tone-swapped rect,.viz-tone-swapped circle{fill:var(--viz-swapped-fill);stroke:var(--viz-swapped-stroke);stroke-width:2.5px}.viz-tone-done rect,.viz-tone-done circle{fill:var(--viz-done-fill);stroke:var(--viz-done-stroke);stroke-width:2px}.viz-cell-value,.viz-node-value,.viz-bar-value{fill:var(--viz-ink);font-size:15px;font-weight:600}.viz-cell-index{fill:var(--viz-muted-ink);font-size:11px}.viz-pointer-label{fill:var(--color-primary);font-size:13px;font-weight:700}.viz-pointer-arrow{fill:var(--color-primary)}.viz-edge line{stroke:var(--viz-muted-ink)}.viz-edge polygon{fill:var(--viz-muted-ink)}.viz-edge.viz-tone-active line{stroke:var(--viz-active-stroke)}.viz-edge.viz-tone-active polygon{fill:var(--viz-active-stroke)}.viz-edge-label{fill:var(--viz-muted-ink);font-size:12px}.viz-end-dot{fill:var(--viz-swapped-stroke);stroke:var(--viz-ink);stroke-width:1.5px}.viz-array-label{margin:var(--space-2) 0 var(--space-1);font-size:var(--text-sm);color:var(--color-text-muted);font-weight:600}.viz-legend{border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface);padding:var(--space-3) var(--space-4);margin-bottom:var(--space-4)}.viz-legend__title{margin:0 0 var(--space-2);font-size:var(--text-sm);color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.05em;font-weight:700}.viz-legend__list{gap:var(--space-2) var(--space-4);flex-wrap:wrap;margin:0;padding:0;list-style:none;display:flex}.viz-legend__item{align-items:center;gap:var(--space-2);font-size:var(--text-sm);color:var(--color-text);display:inline-flex}.viz-legend__swatch{border:2px solid;border-radius:4px;flex-shrink:0;width:1.1rem;height:1.1rem}.viz-legend__swatch.viz-tone-default{background:var(--viz-default-fill);border-color:var(--viz-default-stroke)}.viz-legend__swatch.viz-tone-active{background:var(--viz-active-fill);border-color:var(--viz-active-stroke)}.viz-legend__swatch.viz-tone-compared{background:var(--viz-compared-fill);border-color:var(--viz-compared-stroke)}.viz-legend__swatch.viz-tone-swapped{background:var(--viz-swapped-fill);border-color:var(--viz-swapped-stroke)}.viz-legend__swatch.viz-tone-done{background:var(--viz-done-fill);border-color:var(--viz-done-stroke)}.viz-legend__hint{color:var(--color-text-muted);font-size:var(--text-xs)}.topic-meta{align-items:center;gap:var(--space-2) var(--space-3);margin-bottom:var(--space-4);flex-wrap:wrap;display:flex}.topic-meta__prereqs{font-size:var(--text-sm);color:var(--color-text-muted);margin:0}.topic-section{margin-bottom:var(--space-8)}.topic-section__title{font-size:var(--text-xl);margin:0 0 var(--space-3);padding-bottom:var(--space-2);border-bottom:1px solid var(--color-border)}.topic-section__body p{margin:0 0 var(--space-3)}.topic-section__body ul{margin:0 0 var(--space-3);padding-left:var(--space-5)}.topic-section__body code{background:var(--color-bg-raised);border:1px solid var(--color-border);border-radius:var(--radius-sm);padding:0 var(--space-1);font-size:.9em}.topic-viz-soon{border:1px dashed var(--color-border);border-radius:var(--radius-lg);background:var(--color-bg-raised);padding:var(--space-6) var(--space-4);text-align:center;color:var(--color-text-muted)}.topic-viz-soon p{margin:0}.topic-mistakes{padding-left:var(--space-5);margin:0}.topic-mistakes li+li{margin-top:var(--space-2)}.topic-problems{gap:var(--space-3);grid-template-columns:1fr;margin:0;padding:0;list-style:none;display:grid}.topic-problems__card{border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface);padding:var(--space-3) var(--space-4)}.topic-problems__link{font-weight:600;font-size:var(--text-base)}.topic-problems__tags{gap:var(--space-2);margin-top:var(--space-2);flex-wrap:wrap;align-items:center;display:flex}.topic-problems__tag{font-size:var(--text-xs);color:var(--color-text-muted);background:var(--color-bg-raised);border:1px solid var(--color-border);border-radius:var(--radius-full);padding:var(--space-1) var(--space-2)}.topic-problems__empty{color:var(--color-text-muted)}.topic-pager{gap:var(--space-3);margin-top:var(--space-8);grid-template-columns:1fr 1fr;display:grid}.topic-pager__link{border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface);padding:var(--space-3) 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