.article-head .container{max-width:78ch}.breadcrumbs{margin-bottom:var(--space-8)}.breadcrumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:var(--space-2);list-style:none;padding:0;margin:0;font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:var(--tracking-label)}.breadcrumbs li{display:flex;align-items:center;color:var(--color-muted);max-width:32ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.breadcrumbs li:not(:last-child):after{content:"/";margin-inline-start:var(--space-2);color:var(--color-hairline)}.breadcrumbs a{color:var(--color-muted);text-decoration:none;transition:color var(--transition-fast)}.breadcrumbs a:hover{color:var(--color-secondary)}.breadcrumbs li[aria-current=page]{color:var(--color-ink)}.article-head__meta{display:flex;align-items:center;gap:var(--space-3);margin-bottom:var(--space-6)}.article-head__category{color:var(--color-secondary)}.article-head__sep{width:4px;height:4px;border-radius:var(--radius-full);background:var(--color-hairline)}.article-head__title{max-inline-size:24ch}.article-head__lead{max-inline-size:62ch}.article-head__source{display:inline-flex;flex-wrap:wrap;align-items:baseline;gap:var(--space-2);margin:var(--space-8) 0 0;font-size:var(--text-sm);color:var(--color-muted)}.article-head__source-label{font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:var(--tracking-label);text-transform:uppercase;color:var(--color-muted)}.article-head__source-link{color:var(--color-ink);text-decoration:none;border-bottom:1px solid var(--color-hairline);padding-bottom:2px;transition:border-color var(--transition-fast),color var(--transition-fast)}.article-head__source-link:hover{color:var(--color-secondary);border-color:var(--color-secondary)}.article-main{background:var(--color-surface);padding-block:clamp(var(--space-10),6vw,var(--space-16)) clamp(var(--space-16),10vw,var(--space-24));border-block-start:1px solid var(--color-hairline)}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 16rem;gap:clamp(var(--space-8),5vw,var(--space-16));align-items:start}.article-body{max-width:70ch;font-size:var(--text-lg)}.article-section{position:relative;margin-bottom:clamp(var(--space-12),6vw,var(--space-16));padding-bottom:clamp(var(--space-10),5vw,var(--space-14));border-bottom:1px solid var(--color-hairline)}.article-section__anchor{position:absolute;inset-block-start:0;inset-inline-start:0;width:1px;height:1px;scroll-margin-top:calc(var(--header-height, 80px) + var(--space-6))}.article-section:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}.article-section__head{margin-bottom:var(--space-6)}.article-section__index{font-size:clamp(var(--text-4xl),6vw,var(--text-6xl));margin-bottom:var(--space-2)}.article-section__title{font-size:clamp(var(--text-2xl),3.5vw,var(--text-4xl));line-height:1.08;letter-spacing:-.03em;font-weight:var(--font-bold);color:var(--color-ink);text-wrap:balance;margin:0}.article-section p{font-size:var(--text-lg);color:var(--color-text);line-height:var(--leading-relaxed);margin-bottom:var(--space-5)}.article-section p:last-child{margin-bottom:0}.article-section:first-of-type>p:first-of-type{font-size:var(--text-xl);color:var(--color-ink);font-weight:var(--font-medium);line-height:var(--leading-relaxed)}.article-list,.article-subsection ul{list-style:none;margin:var(--space-5) 0;padding:0}.article-list li,.article-subsection ul li{position:relative;padding-inline-start:var(--space-6);margin-bottom:var(--space-3);font-size:var(--text-base);color:var(--color-text);line-height:var(--leading-relaxed)}.article-list li:before,.article-subsection ul li:before{content:"";position:absolute;inset-inline-start:0;top:.7em;width:6px;height:1px;background:var(--color-secondary)}.key-points{background:var(--color-page);border-radius:var(--radius-lg);padding:clamp(var(--space-5),3vw,var(--space-7));margin:var(--space-8) 0;border-inline-start:2px solid var(--color-secondary)}.key-points h4{font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:var(--tracking-label);text-transform:uppercase;font-weight:var(--font-semibold);color:var(--color-secondary);margin-bottom:var(--space-4)}.key-points ul{list-style:none;padding:0;margin:0}.key-points li{position:relative;padding-inline-start:var(--space-6);margin-bottom:var(--space-2);color:var(--color-text);line-height:var(--leading-relaxed)}.key-points li:before{content:"";position:absolute;inset-inline-start:.1em;top:.5em;width:.4em;height:.7em;border-inline-end:2px solid var(--color-secondary);border-block-end:2px solid var(--color-secondary);transform:rotate(45deg)}.checklist{background:var(--color-page);border-radius:var(--radius-lg);padding:clamp(var(--space-5),3vw,var(--space-7));margin:var(--space-8) 0}.checklist h4{font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:var(--tracking-label);text-transform:uppercase;font-weight:var(--font-semibold);color:var(--color-ink);margin-bottom:var(--space-4)}.checklist ul{list-style:none;padding:0;margin:0}.checklist li{position:relative;padding-block:var(--space-2);padding-inline-start:var(--space-7);border-bottom:1px solid var(--color-hairline);color:var(--color-text)}.checklist li:before{content:"";position:absolute;inset-inline-start:.2em;top:.95em;width:.4em;height:.7em;border-inline-end:2px solid var(--color-secondary);border-block-end:2px solid var(--color-secondary);transform:rotate(45deg)}.checklist li:last-child{border-bottom:none}.article-table-wrapper{overflow-x:auto;margin:var(--space-8) 0;border-block:1px solid var(--color-hairline)}.article-table{width:100%;border-collapse:collapse;background:var(--color-surface);font-variant-numeric:tabular-nums}.article-table th{background:transparent;color:var(--color-ink);padding:var(--space-4);font-family:var(--font-mono);font-weight:var(--font-semibold);letter-spacing:var(--tracking-label);text-transform:uppercase;text-align:start;font-size:var(--text-xs);border-bottom:1px solid var(--color-ink)}.article-table td{padding:var(--space-4);border-bottom:1px solid var(--color-hairline);color:var(--color-text);font-size:var(--text-sm)}.article-table tbody tr:last-child td{border-bottom:none}.article-table tbody tr:hover{background:var(--color-page)}.article-note,.article-warning{display:flex;gap:var(--space-4);align-items:flex-start;padding:var(--space-4) var(--space-5);margin:var(--space-8) 0;background:var(--color-page);border-radius:var(--radius-md)}.article-note{border-inline-start:2px solid var(--color-info)}.article-warning{border-inline-start:2px solid var(--color-warning)}.note-icon,.warning-icon{flex-shrink:0;display:inline-flex;align-items:center;justify-content:center;width:1.5rem;height:1.5rem;border-radius:var(--radius-full);font-family:var(--font-mono);font-weight:var(--font-bold);font-size:var(--text-sm);color:var(--color-white)}.note-icon{background:var(--color-info)}.warning-icon{background:var(--color-warning)}.article-note p,.article-warning p{margin:0;font-size:var(--text-base);line-height:var(--leading-relaxed);color:var(--color-text)}.article-subsection{margin:var(--space-8) 0;padding-inline-start:var(--space-6);border-inline-start:1px solid var(--color-hairline)}.article-subsection h3{font-size:var(--text-xl);letter-spacing:-.02em;color:var(--color-ink);margin-bottom:var(--space-3)}.article-subsection p{font-size:var(--text-base);color:var(--color-text);line-height:var(--leading-relaxed);margin-bottom:var(--space-3)}.steps-list{counter-reset:step;list-style:none;padding:0;margin:var(--space-5) 0}.steps-list li{counter-increment:step;position:relative;padding-inline-start:var(--space-10);margin-bottom:var(--space-4);color:var(--color-text);line-height:var(--leading-relaxed)}.steps-list li:before{content:counter(step,decimal-leading-zero);position:absolute;inset-inline-start:0;top:0;color:var(--color-secondary);font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:var(--text-base);font-weight:var(--font-semibold)}.test-times{background:var(--color-page);border-radius:var(--radius-md);padding:var(--space-4) var(--space-5);margin:var(--space-4) 0}.test-time-item{padding-block:var(--space-2);color:var(--color-text);border-bottom:1px solid var(--color-hairline)}.test-time-item:last-child{border-bottom:none}.test-time-item strong{font-family:var(--font-mono);font-variant-numeric:tabular-nums;color:var(--color-secondary)}.article-glossary{margin-block-start:var(--space-10)}.article-glossary--full{border-block-start:1px solid var(--color-hairline);padding-block-start:clamp(var(--space-10),6vw,var(--space-14));margin-block-start:clamp(var(--space-12),7vw,var(--space-16))}.article-glossary h2{font-size:clamp(var(--text-2xl),3vw,var(--text-3xl));letter-spacing:-.03em;color:var(--color-ink);margin-bottom:var(--space-8)}.article-glossary dl{display:grid;gap:0}.glossary-item{display:grid;grid-template-columns:12rem 1fr;gap:var(--space-6);padding-block:var(--space-5);border-block-start:1px solid var(--color-hairline)}.glossary-item:last-child{border-block-end:1px solid var(--color-hairline)}.glossary-item dt{font-weight:var(--font-semibold);color:var(--color-ink)}.glossary-item dd{color:var(--color-text);margin:0;line-height:var(--leading-relaxed)}.article-standards{border-block-start:1px solid var(--color-hairline);padding-block-start:clamp(var(--space-10),6vw,var(--space-14));margin-block-start:clamp(var(--space-10),6vw,var(--space-14))}.article-standards h2{font-size:clamp(var(--text-2xl),3vw,var(--text-3xl));letter-spacing:-.03em;color:var(--color-ink);margin-bottom:var(--space-8)}.article-standards ul{list-style:none;padding:0;margin:0}.article-standards li{padding-block:var(--space-4);border-block-start:1px solid var(--color-hairline);color:var(--color-text)}.article-standards li:last-child{border-block-end:1px solid var(--color-hairline)}.article-standards strong{font-family:var(--font-mono);font-variant-numeric:tabular-nums;color:var(--color-secondary)}.article-toc{position:sticky;inset-block-start:var(--space-8);align-self:start;border-inline-start:1px solid var(--color-hairline);padding-inline-start:var(--space-6)}.article-toc__title{font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:var(--tracking-label);text-transform:uppercase;color:var(--color-muted);margin-bottom:var(--space-4)}.article-toc ol{list-style:none;padding:0;margin:0;counter-reset:toc;display:flex;flex-direction:column;gap:var(--space-1)}.article-toc a{display:flex;gap:var(--space-3);padding-block:var(--space-2);font-size:var(--text-sm);line-height:var(--leading-normal);color:var(--color-muted);text-decoration:none;transition:color var(--transition-fast)}.article-toc li{counter-increment:toc}.article-toc a:before{content:counter(toc,decimal-leading-zero);font-family:var(--font-mono);font-variant-numeric:tabular-nums;color:var(--color-hairline);flex-shrink:0}.article-toc a:hover{color:var(--color-secondary)}.article-toc a:hover:before{color:var(--color-secondary)}.related-articles{background:var(--color-page);padding-block:clamp(var(--space-16),10vw,var(--space-24));border-block-start:1px solid var(--color-hairline)}.related-articles h2{font-size:clamp(2rem,4vw,var(--text-5xl));line-height:1.05;letter-spacing:-.03em;color:var(--color-ink);margin-bottom:clamp(var(--space-8),5vw,var(--space-12))}.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-6)}.related-card{display:flex;flex-direction:column;gap:var(--space-4);background:var(--color-surface);border:1px solid var(--color-hairline);border-radius:var(--radius-lg);padding:clamp(var(--space-6),3vw,var(--space-8));text-decoration:none;transition:transform var(--transition-normal),box-shadow var(--transition-normal),border-color var(--transition-normal)}.related-card:hover{border-color:transparent}.related-card__icon{display:inline-flex;align-items:center;justify-content:center;width:2.5rem;height:2.5rem;font-size:var(--text-2xl);line-height:1}.related-card h3{font-size:var(--text-lg);letter-spacing:-.02em;color:var(--color-ink);margin:0;line-height:var(--leading-tight)}.related-card p{font-size:var(--text-sm);color:var(--color-text);margin:0;line-height:var(--leading-relaxed);flex-grow:1;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.related-card__more{font-size:var(--text-sm);font-weight:var(--font-semibold);color:var(--color-secondary);display:inline-flex;align-items:center;gap:var(--space-2)}.article-cta{background:var(--color-surface);padding-block:clamp(6rem,12vw,11rem);text-align:center}.article-cta__inner{max-inline-size:56ch;margin-inline:auto;border-block-start:1px solid var(--color-hairline);padding-block-start:clamp(var(--space-14),8vw,var(--space-20))}.article-cta__title{font-size:clamp(2.25rem,5vw,4rem);line-height:1.04;letter-spacing:-.03em;color:var(--color-ink);text-wrap:balance;margin:0 0 var(--space-6)}.article-cta__text{color:var(--color-muted);font-size:clamp(var(--text-lg),2vw,var(--text-xl));line-height:var(--leading-relaxed);max-inline-size:52ch;margin-inline:auto;margin-bottom:var(--space-8)}.article-cta__text strong{color:var(--color-ink);font-weight:var(--font-semibold)}.article-cta__actions{display:flex;flex-wrap:wrap;gap:clamp(var(--space-5),4vw,var(--space-8));justify-content:center;align-items:center}.article-cta__secondary{font-size:var(--text-lg);font-weight:var(--font-semibold)}.article-not-found{min-height:60vh;display:flex;align-items:center;justify-content:center;text-align:center}.article-not-found h1{font-size:var(--text-3xl);letter-spacing:-.03em;color:var(--color-ink);margin-bottom:var(--space-4)}.article-not-found p{color:var(--color-muted);margin-bottom:var(--space-8)}@media(max-width:1024px){.article-layout{grid-template-columns:1fr}.article-toc{position:static;border-inline-start:none;border-block-start:1px solid var(--color-hairline);padding-inline-start:0;padding-block-start:var(--space-6);order:-1;margin-bottom:var(--space-8)}.article-toc ol{gap:0}}@media(max-width:900px){.related-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:600px){.related-grid{grid-template-columns:1fr}.glossary-item{grid-template-columns:1fr;gap:var(--space-1)}.article-table th,.article-table td{padding:var(--space-3);font-size:var(--text-xs)}.article-cta__actions{flex-direction:column;align-items:stretch}.article-cta__actions .btn{width:100%}}.article-progress{--read-progress: 0;position:fixed;inset-block-start:var(--header-height, 80px);inset-inline:0;z-index:var(--z-sticky, 1000);height:2px;background:var(--color-secondary);transform:scaleX(var(--read-progress));transform-origin:right center;will-change:transform;pointer-events:none}.related-card-reveal{display:flex}.related-card-reveal .related-card{flex:1}@media(prefers-reduced-motion:reduce){.article-progress{transition:none}}