.quiz[data-astro-cid-mfm4mael]{border-block:1px solid var(--rule-strong)}fieldset[data-astro-cid-mfm4mael]{padding:var(--space-lg) 0;border:0;border-bottom:1px solid var(--rule-strong);margin:0}legend[data-astro-cid-mfm4mael]{gap:var(--space-sm);width:100%;margin-bottom:var(--space-md);font:var(--weight-semibold) var(--text-lg) var(--font-ui);grid-template-columns:2.5rem 1fr;display:grid}legend[data-astro-cid-mfm4mael] span[data-astro-cid-mfm4mael]{color:var(--accent);font:var(--weight-semibold) var(--text-xs) var(--font-data)}.quiz__options[data-astro-cid-mfm4mael]{background:var(--rule);gap:1px;display:grid}label[data-astro-cid-mfm4mael]{gap:var(--space-sm);min-height:3.25rem;padding:var(--space-xs) var(--space-sm);background:var(--paper);cursor:pointer;grid-template-columns:2rem 1fr;align-items:center;display:grid;position:relative}label[data-astro-cid-mfm4mael]:hover{background:var(--paper-sunken)}label[data-astro-cid-mfm4mael]:has(input:checked){color:var(--ink-on-abyss);background:var(--abyss-raised)}input[data-astro-cid-mfm4mael]{opacity:0;position:absolute}input[data-astro-cid-mfm4mael]:focus-visible+.quiz__key[data-astro-cid-mfm4mael]{outline:3px solid var(--focus);outline-offset:3px}.quiz__key[data-astro-cid-mfm4mael]{aspect-ratio:1;width:1.7rem;font:var(--text-xs) var(--font-data);border:1px solid;border-radius:50%;place-items:center;display:grid}details[data-astro-cid-mfm4mael]{margin-top:var(--space-md);color:var(--ink-muted)}summary[data-astro-cid-mfm4mael]{cursor:pointer;font:var(--weight-semibold) var(--text-sm) var(--font-ui)}.quiz__submit[data-astro-cid-mfm4mael]{align-items:center;gap:var(--space-md);padding-block:var(--space-lg);flex-wrap:wrap;display:flex}button[data-astro-cid-mfm4mael]{justify-content:space-between;gap:var(--space-xl);border:1px solid var(--accent);border-radius:var(--radius-sm);min-width:12rem;color:var(--accent-ink);background:var(--accent);font:var(--weight-semibold) var(--text-sm) var(--font-ui);cursor:pointer;padding:.75rem 1rem;display:inline-flex}.quiz-status[data-astro-cid-mfm4mael]{color:var(--coral);font-weight:var(--weight-semibold);margin:0}[data-astro-cid-mfm4mael][data-complete=true] .quiz-status[data-astro-cid-mfm4mael]{color:var(--kelp)}.learning-check[data-astro-cid-nw5hlt5q]{border-block:1px solid var(--rule-strong)}.learning-check__prompt[data-astro-cid-nw5hlt5q]{gap:var(--space-sm);padding-block:var(--space-lg);grid-template-columns:auto 1fr;display:grid}.learning-check__prompt[data-astro-cid-nw5hlt5q] span[data-astro-cid-nw5hlt5q]{color:var(--sonar);font-size:var(--text-2xl);line-height:1}.learning-check__prompt[data-astro-cid-nw5hlt5q] p[data-astro-cid-nw5hlt5q]{font-size:var(--text-lg);margin:0}label[data-astro-cid-nw5hlt5q],label[data-astro-cid-nw5hlt5q]>span[data-astro-cid-nw5hlt5q]{display:block}label[data-astro-cid-nw5hlt5q]>span[data-astro-cid-nw5hlt5q]{margin-bottom:var(--space-xs);color:var(--ink-faint);font:var(--weight-semibold) var(--text-3xs) var(--font-data);letter-spacing:var(--tracking-eyebrow);text-transform:uppercase}textarea[data-astro-cid-nw5hlt5q]{resize:vertical;width:100%;padding:var(--space-md);border:1px solid var(--rule-strong);border-radius:var(--radius-sm);color:var(--ink);background:var(--paper-raised);font:var(--text-base) / var(--leading-normal) var(--font-body);display:block}textarea[data-astro-cid-nw5hlt5q]::placeholder{color:var(--ink-faint);opacity:1}textarea[data-astro-cid-nw5hlt5q]:focus{border-color:var(--accent);outline:3px solid color-mix(in srgb, var(--focus) 40%, transparent);outline-offset:2px}.learning-check__meta[data-astro-cid-nw5hlt5q]{justify-content:space-between;gap:var(--space-md);padding-block:var(--space-sm);display:flex}.hint[data-astro-cid-nw5hlt5q],.status[data-astro-cid-nw5hlt5q]{color:var(--ink-muted);font-size:var(--text-xs);margin:0}.status[data-astro-cid-nw5hlt5q]{white-space:nowrap}.status[data-astro-cid-nw5hlt5q] [data-astro-cid-nw5hlt5q][aria-hidden]{color:var(--ink-faint);margin-right:var(--space-2xs)}[data-astro-cid-nw5hlt5q][data-complete=true] .status[data-astro-cid-nw5hlt5q],[data-astro-cid-nw5hlt5q][data-complete=true] .status[data-astro-cid-nw5hlt5q] span[data-astro-cid-nw5hlt5q]{color:var(--kelp);font-weight:var(--weight-semibold)}[data-astro-cid-nw5hlt5q][data-save-error=true] .status[data-astro-cid-nw5hlt5q],[data-astro-cid-nw5hlt5q][data-save-error=true] .status[data-astro-cid-nw5hlt5q] span[data-astro-cid-nw5hlt5q]{color:var(--coral);font-weight:var(--weight-semibold)}.clear[data-astro-cid-nw5hlt5q]{padding:var(--space-2xs) var(--space-sm);border:1px solid var(--rule-strong);border-radius:var(--radius-sm);color:var(--ink-muted);font:var(--text-xs) var(--font-ui);cursor:pointer;background:0 0;margin-block-end:var(--space-sm)}.clear[data-astro-cid-nw5hlt5q]:hover{color:var(--ink);border-color:var(--ink-muted)}.clear[data-astro-cid-nw5hlt5q]:focus-visible{outline:3px solid var(--focus);outline-offset:2px}details[data-astro-cid-nw5hlt5q]{padding-block:var(--space-md);border-top:1px solid var(--rule)}summary[data-astro-cid-nw5hlt5q]{cursor:pointer;font:var(--weight-semibold) var(--text-sm) var(--font-ui)}@media (width<=34rem){.learning-check__meta[data-astro-cid-nw5hlt5q]{display:grid}.status[data-astro-cid-nw5hlt5q]{white-space:normal}}.lab-kv[data-astro-cid-zi6qcfjb]{gap:var(--space-md);padding:var(--space-lg);border:1px solid var(--rule-strong);border-radius:var(--radius-md);background:var(--paper-raised);display:grid}.lab-kv__controls[data-astro-cid-zi6qcfjb]{gap:var(--space-md);grid-template-columns:repeat(auto-fit,minmax(13rem,1fr));display:grid}.lab-kv[data-astro-cid-zi6qcfjb] label[data-astro-cid-zi6qcfjb]{gap:var(--space-2xs);display:grid}.lab-kv[data-astro-cid-zi6qcfjb] label[data-astro-cid-zi6qcfjb]>span[data-astro-cid-zi6qcfjb]{color:var(--ink-faint);font:var(--weight-semibold) var(--text-3xs) var(--font-data);letter-spacing:var(--tracking-eyebrow);text-transform:uppercase}.lab-kv[data-astro-cid-zi6qcfjb] input[data-astro-cid-zi6qcfjb],.lab-kv[data-astro-cid-zi6qcfjb] select[data-astro-cid-zi6qcfjb]{width:100%;padding:var(--space-xs) var(--space-sm);border:1px solid var(--rule-strong);border-radius:var(--radius-sm);color:var(--ink);background:var(--paper);font:var(--text-base) var(--font-data)}.lab-kv[data-astro-cid-zi6qcfjb] input[data-astro-cid-zi6qcfjb]:focus,.lab-kv[data-astro-cid-zi6qcfjb] select[data-astro-cid-zi6qcfjb]:focus{border-color:var(--accent);outline:3px solid color-mix(in srgb, var(--focus) 40%, transparent);outline-offset:2px}.lab-kv[data-astro-cid-zi6qcfjb] input[data-astro-cid-zi6qcfjb][aria-invalid=true],.lab-kv[data-astro-cid-zi6qcfjb] select[data-astro-cid-zi6qcfjb][aria-invalid=true]{border-color:var(--coral)}.lab-kv__validation[data-astro-cid-zi6qcfjb]{color:var(--coral);font-size:var(--text-xs);font-weight:var(--weight-semibold);margin:0}.lab-kv__validation[data-astro-cid-zi6qcfjb]:empty{margin-block-start:calc(-1 * var(--space-md))}.lab-kv__out[data-astro-cid-zi6qcfjb]{gap:var(--space-md);padding-block:var(--space-md);border-block:1px solid var(--rule);grid-template-columns:repeat(auto-fit,minmax(9rem,1fr));display:grid}.lab-kv__stat[data-astro-cid-zi6qcfjb]{gap:var(--space-2xs);display:grid}.lab-kv__stat[data-astro-cid-zi6qcfjb] span[data-astro-cid-zi6qcfjb]{color:var(--ink-muted);font-size:var(--text-2xs)}.lab-kv__stat[data-astro-cid-zi6qcfjb] b[data-astro-cid-zi6qcfjb]{font:var(--weight-bold) var(--text-xl) var(--font-display)}.lab-kv__stat--lead[data-astro-cid-zi6qcfjb] b[data-astro-cid-zi6qcfjb]{color:var(--accent)}.lab-kv__verdict[data-astro-cid-zi6qcfjb]{font-weight:var(--weight-semibold);margin:0}.lab-kv__note[data-astro-cid-zi6qcfjb]{color:var(--ink-muted);font-size:var(--text-xs);margin:0}.lab-cost[data-astro-cid-abjsixjw]{gap:var(--space-md);padding:var(--space-lg);border:1px solid var(--rule-strong);border-radius:var(--radius-md);background:var(--paper-raised);display:grid}.lab-cost__controls[data-astro-cid-abjsixjw]{gap:var(--space-md);grid-template-columns:repeat(auto-fit,minmax(13rem,1fr));display:grid}.lab-cost[data-astro-cid-abjsixjw] label[data-astro-cid-abjsixjw]{gap:var(--space-2xs);display:grid}.lab-cost[data-astro-cid-abjsixjw] label[data-astro-cid-abjsixjw]>span[data-astro-cid-abjsixjw]{color:var(--ink-faint);font:var(--weight-semibold) var(--text-3xs) var(--font-data);letter-spacing:var(--tracking-eyebrow);text-transform:uppercase}.lab-cost[data-astro-cid-abjsixjw] input[data-astro-cid-abjsixjw]{width:100%;padding:var(--space-xs) var(--space-sm);border:1px solid var(--rule-strong);border-radius:var(--radius-sm);color:var(--ink);background:var(--paper);font:var(--text-base) var(--font-data)}.lab-cost[data-astro-cid-abjsixjw] input[data-astro-cid-abjsixjw]:focus{border-color:var(--accent);outline:3px solid color-mix(in srgb, var(--focus) 40%, transparent);outline-offset:2px}.lab-cost[data-astro-cid-abjsixjw] input[data-astro-cid-abjsixjw][aria-invalid=true]{border-color:var(--coral)}.lab-cost__validation[data-astro-cid-abjsixjw]{color:var(--coral);font-size:var(--text-xs);font-weight:var(--weight-semibold);margin:0}.lab-cost__validation[data-astro-cid-abjsixjw]:empty{margin-block-start:calc(-1 * var(--space-md))}.lab-cost__out[data-astro-cid-abjsixjw]{gap:var(--space-md);padding-block:var(--space-md);border-block:1px solid var(--rule);grid-template-columns:repeat(auto-fit,minmax(9rem,1fr));display:grid}.lab-cost__stat[data-astro-cid-abjsixjw]{gap:var(--space-2xs);display:grid}.lab-cost__stat[data-astro-cid-abjsixjw] span[data-astro-cid-abjsixjw]{color:var(--ink-muted);font-size:var(--text-2xs)}.lab-cost__stat[data-astro-cid-abjsixjw] b[data-astro-cid-abjsixjw]{font:var(--weight-bold) var(--text-xl) var(--font-display)}.lab-cost__verdict[data-astro-cid-abjsixjw]{font-weight:var(--weight-semibold);color:var(--accent);margin:0}.lab-cost__note[data-astro-cid-abjsixjw]{color:var(--ink-muted);font-size:var(--text-xs);margin:0}.lesson-shell[data-astro-cid-ivjjushy]{--lesson-tier:var(--accent);--lesson-reading-size:calc(var(--text-base) * 1.3);max-width:68rem;padding:var(--space-2xl) var(--space-lg) var(--space-3xl);grid-template-columns:13rem minmax(0,40rem);column-gap:clamp(2rem,5vw,5rem);margin-inline:auto;display:grid}.lesson-shell--core[data-astro-cid-ivjjushy]{--lesson-tier:var(--kelp)}.lesson-shell--advanced[data-astro-cid-ivjjushy]{--lesson-tier:var(--sonar)}.lesson-shell--frontier[data-astro-cid-ivjjushy]{--lesson-tier:var(--coral)}.lesson-shell[data-astro-cid-ivjjushy]>[data-astro-cid-ivjjushy]:not(.lesson-rail){grid-column:2;min-width:0}.lesson-rail[data-astro-cid-ivjjushy]{top:calc(var(--header-h) + var(--space-xl));padding-right:var(--space-lg);grid-area:1/1/span 30;align-self:start;position:sticky}.lesson-rail__position[data-astro-cid-ivjjushy]{align-items:center;gap:var(--space-sm);color:var(--lesson-tier);font:var(--weight-semibold) var(--text-sm) var(--font-data);display:flex}.lesson-rail__position[data-astro-cid-ivjjushy] i[data-astro-cid-ivjjushy]{background:var(--lesson-tier);flex:1;height:2px}.lesson-rail[data-astro-cid-ivjjushy] nav[data-astro-cid-ivjjushy]{margin-top:var(--space-lg);display:grid}.lesson-rail[data-astro-cid-ivjjushy] nav[data-astro-cid-ivjjushy] a[data-astro-cid-ivjjushy]{gap:var(--space-2xs);border-top:1px solid var(--rule);color:var(--ink-muted);font:var(--text-xs) var(--font-ui);grid-template-columns:2rem 1fr;padding:.6rem 0;text-decoration:none;display:grid}.lesson-rail[data-astro-cid-ivjjushy] nav[data-astro-cid-ivjjushy] a[data-astro-cid-ivjjushy]:hover{color:var(--lesson-tier)}.lesson-rail[data-astro-cid-ivjjushy] nav[data-astro-cid-ivjjushy] span[data-astro-cid-ivjjushy]{color:var(--lesson-tier);font-family:var(--font-data)}.lesson-rail[data-astro-cid-ivjjushy]{max-height:calc(100vh - var(--header-h) - var(--space-2xl));overflow-y:auto}.lesson-rail__sub[data-astro-cid-ivjjushy]{margin:0;padding:0;list-style:none;display:grid}.lesson-rail__sub[data-astro-cid-ivjjushy] a[data-astro-cid-ivjjushy]{color:var(--ink-faint);font-size:var(--text-2xs);border-top:0;padding-block:.35rem}.lesson-header[data-astro-cid-ivjjushy]{padding-block:var(--space-xl) var(--space-2xl)}.lesson-header__crumb[data-astro-cid-ivjjushy]{gap:var(--space-xs);color:var(--ink-faint);font:var(--text-xs) var(--font-data);flex-wrap:wrap;display:flex}.lesson-header__tier[data-astro-cid-ivjjushy]{margin:var(--space-lg) 0 var(--space-sm);color:var(--lesson-tier);font:var(--weight-semibold) var(--text-3xs) var(--font-data);letter-spacing:var(--tracking-eyebrow);text-transform:uppercase;display:inline-block}.lesson-header[data-astro-cid-ivjjushy] h1[data-astro-cid-ivjjushy]{max-width:16ch;font-size:clamp(var(--text-3xl), 6vw, 4.75rem);hyphens:auto;overflow-wrap:anywhere;text-transform:uppercase}.summary[data-astro-cid-ivjjushy]{max-width:44rem;margin-block:var(--space-lg) var(--space-sm);color:var(--ink-muted);font-size:var(--text-lg)}.updated[data-astro-cid-ivjjushy]{color:var(--ink-faint);font:var(--text-xs) var(--font-data);margin:0}.prerequisites[data-astro-cid-ivjjushy]{gap:var(--space-md);margin-bottom:var(--space-2xl);padding:var(--space-md) 0;border-block:1px solid var(--rule-strong);grid-template-columns:auto 1fr;display:grid}.prerequisites__marker[data-astro-cid-ivjjushy]{color:var(--sonar);font-size:var(--text-2xl);line-height:1}.prerequisites[data-astro-cid-ivjjushy] h2[data-astro-cid-ivjjushy]{font-size:var(--text-lg)}.prerequisites[data-astro-cid-ivjjushy] p[data-astro-cid-ivjjushy],.prerequisites[data-astro-cid-ivjjushy] ul[data-astro-cid-ivjjushy]{margin-block:var(--space-xs) 0}.lesson-part[data-astro-cid-ivjjushy],.sources[data-astro-cid-ivjjushy]{padding-block:var(--space-2xl);border-top:1px solid var(--rule-strong)}.part-heading[data-astro-cid-ivjjushy]{scroll-margin-top:calc(var(--header-h) + var(--space-md));margin-bottom:var(--space-lg);font-size:clamp(var(--text-2xl), 4vw, var(--text-3xl));text-transform:uppercase}.part-number[data-astro-cid-ivjjushy]{margin:0 0 var(--space-sm);color:var(--lesson-tier);font:var(--weight-semibold) var(--text-3xs) var(--font-data);letter-spacing:var(--tracking-eyebrow)}.prose[data-astro-cid-ivjjushy]{font-size:var(--lesson-reading-size)}.prose[data-astro-cid-ivjjushy] h2,.prose[data-astro-cid-ivjjushy] h3{margin-top:var(--space-2xl)}.prose[data-astro-cid-ivjjushy] h2:not(.part-heading){scroll-margin-top:calc(var(--header-h) + var(--space-md));margin-bottom:var(--space-md);font-size:var(--text-xl);line-height:var(--leading-snug)}.prose[data-astro-cid-ivjjushy] .heading-anchor{color:inherit;text-decoration:none}.prose[data-astro-cid-ivjjushy] .heading-anchor:hover{color:var(--lesson-tier)}.prose[data-astro-cid-ivjjushy] p:not(.part-number),.prose[data-astro-cid-ivjjushy] li{line-height:1.65}.prose[data-astro-cid-ivjjushy] p:not(.part-number){margin-block:0 1.25em}.prose[data-astro-cid-ivjjushy] ul,.prose[data-astro-cid-ivjjushy] ol{gap:.4em;margin-block:1.25em;padding-inline-start:1.5em;display:grid}.prose[data-astro-cid-ivjjushy] li{padding-inline-start:.25em}.prose[data-astro-cid-ivjjushy] li::marker{color:var(--lesson-tier);font-family:var(--font-data);font-size:.72em;font-weight:var(--weight-semibold)}.prose[data-astro-cid-ivjjushy] figure ul,.prose[data-astro-cid-ivjjushy] figure ol{gap:0;margin-block:0;padding-inline-start:0}.prose[data-astro-cid-ivjjushy] figure li{padding-inline-start:0}.prose[data-astro-cid-ivjjushy] figure li::marker{content:none}.prose[data-astro-cid-ivjjushy] pre{padding:var(--space-md);border-radius:var(--radius-sm);overflow-x:auto}.prose[data-astro-cid-ivjjushy] :not(pre)>code,.prose[data-astro-cid-ivjjushy] a{overflow-wrap:anywhere}.lesson-shell[data-astro-cid-ivjjushy] .katex:not(.math-scroll){max-inline-size:100%;display:inline-flex;overflow:auto hidden}@supports (baseline-source:first){.lesson-shell[data-astro-cid-ivjjushy] .katex:not(.math-scroll){baseline-source:first;display:inline-block}}.lesson-shell[data-astro-cid-ivjjushy] .math-scroll{overscroll-behavior-inline:contain;inline-size:100%;display:block;overflow:auto hidden}.lesson-shell[data-astro-cid-ivjjushy] .math-scroll:focus-visible{outline:3px solid var(--focus);outline-offset:2px}.prose[data-astro-cid-ivjjushy] blockquote{padding-left:var(--space-md);border-left:1px solid var(--lesson-tier);color:var(--ink-muted);margin-inline:0}.prose[data-astro-cid-ivjjushy] .callout{--callout-pigment:var(--accent);padding:var(--space-md);border:1px solid var(--rule);border-inline-start:3px solid var(--callout-pigment);border-radius:var(--radius-md);background:color-mix(in srgb, var(--callout-pigment) 7%, var(--paper-raised));margin-block:1.5em;font-size:.94em}.prose[data-astro-cid-ivjjushy] .callout--note{--callout-pigment:var(--accent)}.prose[data-astro-cid-ivjjushy] .callout--insight{--callout-pigment:var(--kelp)}.prose[data-astro-cid-ivjjushy] .callout--warning{--callout-pigment:var(--coral)}.prose[data-astro-cid-ivjjushy] .callout--caveat{--callout-pigment:var(--sonar)}.prose[data-astro-cid-ivjjushy] .callout__label{margin:0 0 var(--space-2xs);color:var(--callout-pigment);font:var(--weight-semibold) var(--text-3xs) var(--font-data);letter-spacing:var(--tracking-eyebrow);text-transform:uppercase}.prose[data-astro-cid-ivjjushy] .callout>p:last-child{margin-bottom:0}.prose[data-astro-cid-ivjjushy] .table-scroll{border:1px solid var(--rule);border-radius:var(--radius-md);background:var(--paper-raised);margin-block:1.5em;overflow-x:auto}.prose[data-astro-cid-ivjjushy] .table-scroll table{border-collapse:collapse;width:100%;font-size:.9em}.prose[data-astro-cid-ivjjushy] .table-scroll th,.prose[data-astro-cid-ivjjushy] .table-scroll td{text-align:left;vertical-align:top;border-bottom:1px solid var(--rule);padding:.6em .85em}.prose[data-astro-cid-ivjjushy] .table-scroll thead th{font-family:var(--font-data);font-size:var(--text-3xs);font-weight:var(--weight-semibold);letter-spacing:var(--tracking-eyebrow);text-transform:uppercase;color:var(--ink-muted);border-bottom-color:var(--lesson-tier);white-space:nowrap}.prose[data-astro-cid-ivjjushy] .table-scroll tbody tr:last-child td{border-bottom:0}.prose[data-astro-cid-ivjjushy] .table-scroll td:first-child{font-weight:var(--weight-semibold)}.prose[data-astro-cid-ivjjushy] .table-scroll code{white-space:nowrap}.analogy[data-astro-cid-ivjjushy]{color-scheme:dark;margin-inline:calc(var(--space-lg) * -1);padding-inline:var(--space-lg);color:var(--ink-on-abyss);background:var(--abyss);border-top:4px solid var(--sonar);clip-path:polygon(0 1.25rem,100% 0,100% calc(100% - 1rem),0 100%);position:relative}.analogy[data-astro-cid-ivjjushy] .part-number[data-astro-cid-ivjjushy]{color:var(--sonar)}.analogy[data-astro-cid-ivjjushy]>p[data-astro-cid-ivjjushy]:last-child{color:var(--ink-muted-on-abyss);font-size:var(--text-lg)}.lab[data-astro-cid-ivjjushy]{background:linear-gradient(90deg, color-mix(in srgb, var(--accent) 8%, transparent), transparent)}.completion[data-astro-cid-ivjjushy]{gap:var(--space-sm);margin:var(--space-lg) 0;padding:var(--space-md);border:1px solid var(--rule-strong);border-radius:var(--radius-sm);color:var(--ink-muted);align-items:center;display:flex}.completion[data-astro-cid-ivjjushy] span[data-astro-cid-ivjjushy]{aspect-ratio:1;border:1px solid;border-radius:50%;place-items:center;width:1.8rem;display:grid}[data-astro-cid-ivjjushy][data-complete=true]>.completion[data-astro-cid-ivjjushy]{color:var(--kelp);border-color:var(--kelp)}.sources[data-astro-cid-ivjjushy] ol[data-astro-cid-ivjjushy]{padding-left:var(--space-lg)}.sources[data-astro-cid-ivjjushy] a[data-astro-cid-ivjjushy]{overflow-wrap:anywhere}.sources[data-astro-cid-ivjjushy] li[data-astro-cid-ivjjushy]{margin-block:var(--space-xs)}.lesson-nav[data-astro-cid-ivjjushy]{margin-top:var(--space-2xl);background:var(--rule-strong);border-block:1px solid var(--rule-strong);grid-template-columns:1fr 1fr;gap:1px;display:grid}.lesson-nav[data-astro-cid-ivjjushy] a[data-astro-cid-ivjjushy]{gap:var(--space-xs);padding:var(--space-lg);background:var(--paper);text-decoration:none;display:grid}.lesson-nav[data-astro-cid-ivjjushy] a[data-astro-cid-ivjjushy]:last-child{text-align:end}.lesson-nav[data-astro-cid-ivjjushy] a[data-astro-cid-ivjjushy]:hover{background:var(--paper-sunken)}.lesson-nav[data-astro-cid-ivjjushy] span[data-astro-cid-ivjjushy]{color:var(--ink-faint);font:var(--text-3xs) var(--font-data);letter-spacing:var(--tracking-eyebrow);text-transform:uppercase}.lesson-nav[data-astro-cid-ivjjushy] strong[data-astro-cid-ivjjushy]{font:var(--weight-semibold) var(--text-base) var(--font-ui)}@media (width<=58rem){.lesson-shell[data-astro-cid-ivjjushy]{max-width:48rem;padding-top:var(--space-lg);grid-template-columns:1fr}.lesson-shell[data-astro-cid-ivjjushy]>[data-astro-cid-ivjjushy]:not(.lesson-rail),.lesson-rail[data-astro-cid-ivjjushy]{grid-column:1}.lesson-rail[data-astro-cid-ivjjushy]{z-index:var(--z-raised);align-items:center;gap:var(--space-sm);padding:var(--space-xs);background:var(--paper);border-block:1px solid var(--rule-strong);grid-row:auto;display:flex;position:sticky;top:7.4rem;overflow-x:auto}.lesson-rail__position[data-astro-cid-ivjjushy]{flex:none}.lesson-rail__position[data-astro-cid-ivjjushy] i[data-astro-cid-ivjjushy]{display:none}.lesson-rail[data-astro-cid-ivjjushy] nav[data-astro-cid-ivjjushy]{flex:none;margin:0;display:flex}.lesson-rail[data-astro-cid-ivjjushy] nav[data-astro-cid-ivjjushy] a[data-astro-cid-ivjjushy]{padding:var(--space-xs);white-space:nowrap;border:0;display:flex}.lesson-header[data-astro-cid-ivjjushy]{padding-top:var(--space-2xl)}.part-heading[data-astro-cid-ivjjushy],.prose[data-astro-cid-ivjjushy] h2:not(.part-heading){scroll-margin-top:calc(7.4rem + 4.25rem + var(--space-sm))}.lesson-rail[data-astro-cid-ivjjushy]{max-height:none;overflow-y:visible}.lesson-rail__sub[data-astro-cid-ivjjushy]{display:none}}@media (width<=36rem){.lesson-shell[data-astro-cid-ivjjushy]{padding-inline:var(--space-sm)}.lesson-header[data-astro-cid-ivjjushy] h1[data-astro-cid-ivjjushy]{font-size:3rem}.analogy[data-astro-cid-ivjjushy]{margin-inline:calc(var(--space-sm) * -1);padding-inline:var(--space-sm)}.lesson-nav[data-astro-cid-ivjjushy]{grid-template-columns:1fr}}[data-astro-cid-uo7nci4b][data-pigment=accent]{--fig-pigment:var(--accent)}[data-astro-cid-uo7nci4b][data-pigment=sonar]{--fig-pigment:var(--sonar)}[data-astro-cid-uo7nci4b][data-pigment=coral]{--fig-pigment:var(--coral)}[data-astro-cid-uo7nci4b][data-pigment=kelp]{--fig-pigment:var(--kelp)}[data-astro-cid-uo7nci4b][data-pigment=muted]{--fig-pigment:var(--ink-faint)}.fig-flow[data-astro-cid-uo7nci4b].fig-flow{gap:var(--space-2xs);grid-template-columns:repeat(auto-fit,minmax(7rem,1fr));margin:0;padding:0;list-style:none;display:grid}.fig-flow__step[data-astro-cid-uo7nci4b]{align-content:start;gap:var(--space-3xs);padding:var(--space-xs);border:1px solid var(--rule);border-top:2px solid var(--fig-pigment,var(--accent));border-radius:var(--radius-sm);background:var(--paper);display:grid}.fig-flow__step[data-astro-cid-uo7nci4b]+.fig-flow__step[data-astro-cid-uo7nci4b]{position:relative}.fig-flow__step[data-astro-cid-uo7nci4b]+.fig-flow__step[data-astro-cid-uo7nci4b]:before{content:"";width:var(--space-2xs);border-top:1px solid var(--rule-strong);position:absolute;inset-block-start:50%;inset-inline-start:calc(var(--space-2xs) * -1)}.fig-flow__label[data-astro-cid-uo7nci4b]{font-weight:var(--weight-semibold);line-height:var(--leading-snug);text-wrap:balance}.fig-flow__detail[data-astro-cid-uo7nci4b]{color:var(--ink-muted);font-family:var(--font-data);font-size:var(--text-3xs)}.fig-stack[data-astro-cid-uo7nci4b].fig-stack{gap:var(--space-3xs);margin:0;padding:0;list-style:none;display:grid}.fig-stack[data-astro-cid-uo7nci4b][data-direction=up]{direction:ltr}.fig-stack__band[data-astro-cid-uo7nci4b]{gap:0 var(--space-sm);padding-block:var(--space-3xs) var(--space-2xs);border-bottom:1px solid var(--rule);grid-template-columns:minmax(0,1fr) auto;grid-template-areas:"bar bar""label share""detail share";display:grid}.fig-stack__bar[data-astro-cid-uo7nci4b]{width:var(--share);height:6px;margin-bottom:var(--space-3xs);border-radius:var(--radius-xs);background:var(--fig-pigment,var(--accent));grid-area:bar}.fig-stack__label[data-astro-cid-uo7nci4b]{font-weight:var(--weight-semibold);grid-area:label}.fig-stack__detail[data-astro-cid-uo7nci4b]{color:var(--ink-muted);font-family:var(--font-data);font-size:var(--text-3xs);grid-area:detail}.fig-stack__share[data-astro-cid-uo7nci4b]{color:var(--ink-muted);font-family:var(--font-data);font-size:var(--text-2xs);grid-area:share;align-self:center}.fig-scroll[data-astro-cid-uo7nci4b]{overflow-x:auto}.fig-scroll[data-astro-cid-uo7nci4b]:focus-visible{outline:3px solid var(--focus);outline-offset:2px}.fig-grid[data-astro-cid-uo7nci4b]{border-collapse:collapse;width:100%;font-family:var(--font-data);font-size:var(--text-3xs)}.fig-grid[data-astro-cid-uo7nci4b] th[data-astro-cid-uo7nci4b],.fig-grid[data-astro-cid-uo7nci4b] td[data-astro-cid-uo7nci4b]{text-align:center;border:1px solid var(--rule);padding:.35em .5em}.fig-grid[data-astro-cid-uo7nci4b] thead[data-astro-cid-uo7nci4b] th[data-astro-cid-uo7nci4b],.fig-grid[data-astro-cid-uo7nci4b] tbody[data-astro-cid-uo7nci4b] th[data-astro-cid-uo7nci4b]{color:var(--ink-muted);font-weight:var(--weight-semibold);white-space:nowrap}.fig-grid[data-astro-cid-uo7nci4b] tbody[data-astro-cid-uo7nci4b] th[data-astro-cid-uo7nci4b]{text-align:start}.fig-grid__cell[data-astro-cid-uo7nci4b][data-bin="0"]{background:color-mix(in srgb, var(--accent) 6%, var(--paper))}.fig-grid__cell[data-astro-cid-uo7nci4b][data-bin="1"]{background:color-mix(in srgb, var(--accent) 16%, var(--paper))}.fig-grid__cell[data-astro-cid-uo7nci4b][data-bin="2"]{background:color-mix(in srgb, var(--accent) 28%, var(--paper))}.fig-grid__cell[data-astro-cid-uo7nci4b][data-bin="3"]{background:color-mix(in srgb, var(--accent) 42%, var(--paper))}.fig-grid__cell--masked[data-astro-cid-uo7nci4b]{color:var(--ink-faint);background:repeating-linear-gradient(45deg, transparent, transparent 3px, var(--rule) 3px, var(--rule) 4px)}.fig-plot[data-astro-cid-uo7nci4b]{gap:var(--space-3xs) var(--space-2xs);grid-template-columns:auto auto minmax(0,1fr);grid-template-areas:"ytitle yticks area"". .xticks"". .xtitle""legend legend legend""data data data";min-inline-size:0;display:grid}.fig-plot__area[data-astro-cid-uo7nci4b]{aspect-ratio:16/9;min-inline-size:0;grid-area:area;min-height:11rem;position:relative}.fig-plot__svg[data-astro-cid-uo7nci4b]{width:100%;height:100%;position:absolute;inset:0;overflow:visible}.fig-plot__grid[data-astro-cid-uo7nci4b]{stroke:var(--rule);stroke-width:1px}.fig-plot__line[data-astro-cid-uo7nci4b]{fill:none;stroke:var(--fig-pigment,var(--accent));stroke-width:2px;stroke-linejoin:round;stroke-linecap:round}.fig-plot__yticks[data-astro-cid-uo7nci4b],.fig-plot__xticks[data-astro-cid-uo7nci4b]{font-family:var(--font-data);font-size:var(--text-3xs);color:var(--ink-faint);position:relative}.fig-plot__yticks[data-astro-cid-uo7nci4b] span[data-astro-cid-uo7nci4b],.fig-plot__xticks[data-astro-cid-uo7nci4b] span[data-astro-cid-uo7nci4b]{white-space:nowrap;position:absolute}.fig-plot__yticks[data-astro-cid-uo7nci4b]{grid-area:yticks;min-width:2.2rem}.fig-plot__yticks[data-astro-cid-uo7nci4b] span[data-astro-cid-uo7nci4b]{inset-block-end:var(--pos);inset-inline-end:0;transform:translateY(50%)}.fig-plot__xticks[data-astro-cid-uo7nci4b]{grid-area:xticks;height:1.1rem}.fig-plot__xticks[data-astro-cid-uo7nci4b] span[data-astro-cid-uo7nci4b]{inset-block-start:0;inset-inline-start:var(--pos);transform:translate(-50%)}.fig-plot__mark[data-astro-cid-uo7nci4b]{box-sizing:border-box;border:1px solid var(--fig-pigment,var(--accent));border-radius:var(--radius-xs);background:var(--paper-raised);inline-size:max-content;max-inline-size:100%;font-family:var(--font-data);font-size:var(--text-3xs);overflow-wrap:anywhere;line-height:var(--leading-snug);padding:.1rem .35rem;position:absolute;inset-block-end:var(--y);inset-inline-start:var(--x);transform:translate(-50%,50%)}.fig-plot__mark[data-astro-cid-uo7nci4b][data-anchor=end]{transform:translate(-100%,50%)}.fig-plot__mark[data-astro-cid-uo7nci4b][data-anchor=start]{transform:translateY(50%)}.fig-plot__axis[data-astro-cid-uo7nci4b]{color:var(--ink-muted);font-family:var(--font-data);font-size:var(--text-3xs);margin:0}.fig-plot__axis--x[data-astro-cid-uo7nci4b]{text-align:center;grid-area:xtitle}.fig-plot__axis--y[data-astro-cid-uo7nci4b]{writing-mode:vertical-rl;grid-area:ytitle;align-self:center;rotate:180deg}.fig-plot__legend[data-astro-cid-uo7nci4b].fig-plot__legend{gap:var(--space-sm);margin:var(--space-2xs) 0 0;font-size:var(--text-2xs);flex-wrap:wrap;grid-area:legend;padding:0;list-style:none;display:flex}.fig-plot__legend[data-astro-cid-uo7nci4b] li[data-astro-cid-uo7nci4b]{align-items:center;gap:var(--space-3xs);display:inline-flex}.fig-plot__legend[data-astro-cid-uo7nci4b] li[data-astro-cid-uo7nci4b]:before{content:"";border-radius:var(--radius-xs);background:var(--fig-pigment,var(--accent));width:.9rem;height:3px}.fig-plot__data[data-astro-cid-uo7nci4b]{margin-top:var(--space-md);font-size:var(--text-2xs);grid-area:data}.fig-plot__data[data-astro-cid-uo7nci4b] summary[data-astro-cid-uo7nci4b]{color:var(--ink-muted);cursor:pointer}.fig-plot__data[data-astro-cid-uo7nci4b][open] summary[data-astro-cid-uo7nci4b]{margin-bottom:var(--space-2xs)}@media (width<=34rem){.fig-plot__area[data-astro-cid-uo7nci4b]{aspect-ratio:auto}.fig-flow[data-astro-cid-uo7nci4b].fig-flow{grid-template-columns:1fr}.fig-flow__step[data-astro-cid-uo7nci4b]+.fig-flow__step[data-astro-cid-uo7nci4b]:before{display:none}}.figure[data-astro-cid-khyig4bw]{font-size:var(--text-sm);margin-block:2em;margin-inline:0}.figure__frame[data-astro-cid-khyig4bw]{padding:var(--space-md);border:1px solid var(--rule);border-radius:var(--radius-md);background:var(--paper-raised)}.figure__steps[data-astro-cid-khyig4bw]{gap:var(--space-2xs);margin-bottom:var(--space-md);padding-bottom:var(--space-sm);border-bottom:1px solid var(--rule);flex-wrap:wrap;display:flex}.figure__step-label[data-astro-cid-khyig4bw]{align-items:baseline;gap:var(--space-3xs);border:1px solid var(--rule);border-radius:var(--radius-sm);color:var(--ink-muted);font-size:var(--text-2xs);cursor:pointer;padding:.35rem .7rem;display:inline-flex}.figure__step-n[data-astro-cid-khyig4bw]{color:var(--lesson-tier,var(--accent));font-family:var(--font-data);font-size:var(--text-3xs)}.figure__frame[data-astro-cid-khyig4bw][data-stepped] .figure__panel[data-astro-cid-khyig4bw]{display:none}.figure__frame[data-astro-cid-khyig4bw][data-stepped] .figure__radio[data-astro-cid-khyig4bw]:first-of-type:checked~.figure__panels[data-astro-cid-khyig4bw]>.figure__panel[data-astro-cid-khyig4bw]:first-child,.figure__frame[data-astro-cid-khyig4bw][data-stepped] .figure__radio[data-astro-cid-khyig4bw]:nth-of-type(2):checked~.figure__panels[data-astro-cid-khyig4bw]>.figure__panel[data-astro-cid-khyig4bw]:nth-child(2),.figure__frame[data-astro-cid-khyig4bw][data-stepped] .figure__radio[data-astro-cid-khyig4bw]:nth-of-type(3):checked~.figure__panels[data-astro-cid-khyig4bw]>.figure__panel[data-astro-cid-khyig4bw]:nth-child(3),.figure__frame[data-astro-cid-khyig4bw][data-stepped] .figure__radio[data-astro-cid-khyig4bw]:nth-of-type(4):checked~.figure__panels[data-astro-cid-khyig4bw]>.figure__panel[data-astro-cid-khyig4bw]:nth-child(4),.figure__frame[data-astro-cid-khyig4bw][data-stepped] .figure__radio[data-astro-cid-khyig4bw]:nth-of-type(5):checked~.figure__panels[data-astro-cid-khyig4bw]>.figure__panel[data-astro-cid-khyig4bw]:nth-child(5),.figure__frame[data-astro-cid-khyig4bw][data-stepped] .figure__radio[data-astro-cid-khyig4bw]:nth-of-type(6):checked~.figure__panels[data-astro-cid-khyig4bw]>.figure__panel[data-astro-cid-khyig4bw]:nth-child(6){display:block}.figure__frame[data-astro-cid-khyig4bw][data-stepped] .figure__radio[data-astro-cid-khyig4bw]:first-of-type:checked~.figure__steps[data-astro-cid-khyig4bw]>.figure__step-label[data-astro-cid-khyig4bw]:first-child,.figure__frame[data-astro-cid-khyig4bw][data-stepped] .figure__radio[data-astro-cid-khyig4bw]:nth-of-type(2):checked~.figure__steps[data-astro-cid-khyig4bw]>.figure__step-label[data-astro-cid-khyig4bw]:nth-child(2),.figure__frame[data-astro-cid-khyig4bw][data-stepped] .figure__radio[data-astro-cid-khyig4bw]:nth-of-type(3):checked~.figure__steps[data-astro-cid-khyig4bw]>.figure__step-label[data-astro-cid-khyig4bw]:nth-child(3),.figure__frame[data-astro-cid-khyig4bw][data-stepped] .figure__radio[data-astro-cid-khyig4bw]:nth-of-type(4):checked~.figure__steps[data-astro-cid-khyig4bw]>.figure__step-label[data-astro-cid-khyig4bw]:nth-child(4),.figure__frame[data-astro-cid-khyig4bw][data-stepped] .figure__radio[data-astro-cid-khyig4bw]:nth-of-type(5):checked~.figure__steps[data-astro-cid-khyig4bw]>.figure__step-label[data-astro-cid-khyig4bw]:nth-child(5),.figure__frame[data-astro-cid-khyig4bw][data-stepped] .figure__radio[data-astro-cid-khyig4bw]:nth-of-type(6):checked~.figure__steps[data-astro-cid-khyig4bw]>.figure__step-label[data-astro-cid-khyig4bw]:nth-child(6){color:var(--accent-ink);background:var(--accent);border-color:var(--accent)}.figure__frame[data-astro-cid-khyig4bw][data-stepped] .figure__radio[data-astro-cid-khyig4bw]:first-of-type:checked~.figure__steps[data-astro-cid-khyig4bw]>.figure__step-label[data-astro-cid-khyig4bw]:first-child .figure__step-n[data-astro-cid-khyig4bw],.figure__frame[data-astro-cid-khyig4bw][data-stepped] .figure__radio[data-astro-cid-khyig4bw]:nth-of-type(2):checked~.figure__steps[data-astro-cid-khyig4bw]>.figure__step-label[data-astro-cid-khyig4bw]:nth-child(2) .figure__step-n[data-astro-cid-khyig4bw],.figure__frame[data-astro-cid-khyig4bw][data-stepped] .figure__radio[data-astro-cid-khyig4bw]:nth-of-type(3):checked~.figure__steps[data-astro-cid-khyig4bw]>.figure__step-label[data-astro-cid-khyig4bw]:nth-child(3) .figure__step-n[data-astro-cid-khyig4bw],.figure__frame[data-astro-cid-khyig4bw][data-stepped] .figure__radio[data-astro-cid-khyig4bw]:nth-of-type(4):checked~.figure__steps[data-astro-cid-khyig4bw]>.figure__step-label[data-astro-cid-khyig4bw]:nth-child(4) .figure__step-n[data-astro-cid-khyig4bw],.figure__frame[data-astro-cid-khyig4bw][data-stepped] .figure__radio[data-astro-cid-khyig4bw]:nth-of-type(5):checked~.figure__steps[data-astro-cid-khyig4bw]>.figure__step-label[data-astro-cid-khyig4bw]:nth-child(5) .figure__step-n[data-astro-cid-khyig4bw],.figure__frame[data-astro-cid-khyig4bw][data-stepped] .figure__radio[data-astro-cid-khyig4bw]:nth-of-type(6):checked~.figure__steps[data-astro-cid-khyig4bw]>.figure__step-label[data-astro-cid-khyig4bw]:nth-child(6) .figure__step-n[data-astro-cid-khyig4bw]{color:inherit}.figure__frame[data-astro-cid-khyig4bw][data-stepped] .figure__radio[data-astro-cid-khyig4bw]:first-of-type:focus-visible~.figure__steps[data-astro-cid-khyig4bw]>.figure__step-label[data-astro-cid-khyig4bw]:first-child,.figure__frame[data-astro-cid-khyig4bw][data-stepped] .figure__radio[data-astro-cid-khyig4bw]:nth-of-type(2):focus-visible~.figure__steps[data-astro-cid-khyig4bw]>.figure__step-label[data-astro-cid-khyig4bw]:nth-child(2),.figure__frame[data-astro-cid-khyig4bw][data-stepped] .figure__radio[data-astro-cid-khyig4bw]:nth-of-type(3):focus-visible~.figure__steps[data-astro-cid-khyig4bw]>.figure__step-label[data-astro-cid-khyig4bw]:nth-child(3),.figure__frame[data-astro-cid-khyig4bw][data-stepped] .figure__radio[data-astro-cid-khyig4bw]:nth-of-type(4):focus-visible~.figure__steps[data-astro-cid-khyig4bw]>.figure__step-label[data-astro-cid-khyig4bw]:nth-child(4),.figure__frame[data-astro-cid-khyig4bw][data-stepped] .figure__radio[data-astro-cid-khyig4bw]:nth-of-type(5):focus-visible~.figure__steps[data-astro-cid-khyig4bw]>.figure__step-label[data-astro-cid-khyig4bw]:nth-child(5),.figure__frame[data-astro-cid-khyig4bw][data-stepped] .figure__radio[data-astro-cid-khyig4bw]:nth-of-type(6):focus-visible~.figure__steps[data-astro-cid-khyig4bw]>.figure__step-label[data-astro-cid-khyig4bw]:nth-child(6){outline:3px solid var(--focus);outline-offset:3px}.figure__step-caption[data-astro-cid-khyig4bw]{margin:var(--space-md) 0 0;color:var(--ink-muted);font-size:var(--text-2xs);line-height:var(--leading-snug)}figcaption[data-astro-cid-khyig4bw]{margin-top:var(--space-sm);color:var(--ink-muted);font-size:var(--text-2xs);line-height:var(--leading-snug);text-wrap:balance}.figure__title[data-astro-cid-khyig4bw]{color:var(--ink);font:var(--weight-semibold) var(--text-3xs) var(--font-data);letter-spacing:var(--tracking-eyebrow);text-transform:uppercase;display:block}.figure__derived[data-astro-cid-khyig4bw]{margin-top:var(--space-3xs);display:inline-block}@media print{.figure[data-astro-cid-khyig4bw]{break-inside:avoid}.figure__panel[data-astro-cid-khyig4bw]{display:block!important}.figure__steps[data-astro-cid-khyig4bw]{display:none}.figure[data-astro-cid-khyig4bw] details{display:block}.figure[data-astro-cid-khyig4bw] details>summary{display:none}}