@charset "UTF-8";.cs{--cs-gap: 1.25rem;--cs-fig: 3.25rem;max-width:1080px;margin:0 auto;padding:4rem 1.5rem 7rem;color:var(--text)}.cs p{max-width:49rem;margin:0 auto 1.5rem;font-size:var(--text-base);line-height:1.75;color:var(--text-muted)}.cs h2{max-width:49rem;margin:0 auto 1.75rem;font-size:var(--text-3xl);line-height:1.15;letter-spacing:-.02em;color:var(--text)}.cs img{display:block;width:100%;height:auto;border-radius:var(--radius-lg)}.cs figcaption,.cs .cs-caption{max-width:49rem;margin:1rem auto var(--cs-fig);font-size:var(--text-sm);line-height:1.6;color:var(--text-subtle)}.cs-topbar{position:fixed;top:1.25rem;right:1.25rem;left:1.25rem;z-index:20;display:flex;gap:1rem;align-items:center;justify-content:space-between;pointer-events:none}.cs-topbar>*{pointer-events:auto}.cs-topbar .theme-toggle{background:color-mix(in srgb,var(--surface) 82%,transparent);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.cs-topbar-left{display:flex;gap:.6rem;align-items:center;min-width:0}.cs-where{display:flex;gap:.6rem;align-items:baseline;min-width:0;margin:0!important;padding:.5rem .9rem;font-family:var(--font-mono);font-size:var(--text-xs)!important;letter-spacing:.08em;background:color-mix(in srgb,var(--surface) 82%,transparent);border:1px solid var(--border);border-radius:var(--radius-full);opacity:0;transition:opacity .25s ease;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.cs-where[data-shown=true]{opacity:1}.cs-where-num{flex:none;color:var(--text-brand)}.cs-where-title{overflow:hidden;color:var(--text-muted);text-overflow:ellipsis;white-space:nowrap}@media(prefers-reduced-motion:reduce){.cs-where{transition:none}}.cs-back{display:inline-flex;gap:.5rem;align-items:center;padding:.5rem .9rem;font-size:var(--text-sm);font-weight:600;color:var(--text);text-decoration:none;background:color-mix(in srgb,var(--surface) 82%,transparent);border:1px solid var(--border);border-radius:var(--radius-full);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.cs-back:hover{background:var(--surface-muted)}.cs-back:focus-visible{outline:2px solid var(--focus-ring);outline-offset:2px}.cs-hero{padding:3rem 0 4rem}.cs-hero h1{max-width:20ch;margin:0 auto 1.5rem;font-size:var(--text-5xl);line-height:1.05;letter-spacing:-.03em;text-align:center;color:var(--text)}.cs-hero h1 span{color:var(--text-brand)}.cs-eyebrow{margin-bottom:1rem!important;font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:.14em;text-align:center;text-transform:uppercase;color:var(--text-subtle)}.cs-standfirst{font-size:var(--text-lg)!important;text-align:center}.cs-meta{display:flex;flex-wrap:wrap;gap:2.5rem;justify-content:center;max-width:49rem;margin:2.5rem auto 3rem;padding:1.5rem 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}.cs-meta dt{margin-bottom:.35rem;font-family:var(--font-mono);font-size:var(--text-2xs);letter-spacing:.12em;text-transform:uppercase;color:var(--text-subtle)}.cs-meta dd{margin:0;font-size:var(--text-sm);font-weight:600;color:var(--text)}.cs-live{display:inline-block;width:.5rem;height:.5rem;margin-right:.4rem;background:var(--success-500);border-radius:50%}.cs-hero-shot{box-shadow:var(--shadow-lg)}.cs-section{padding:6rem 0;border-top:1px solid var(--border)}.cs-num{max-width:49rem;margin:0 auto 1rem!important;font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:.14em;color:var(--text-brand)}.cs-sub{max-width:49rem;margin:4.5rem auto 1.5rem;font-size:var(--text-lg);font-weight:700;letter-spacing:0;color:var(--text-brand)}.cs-lede{font-size:var(--text-lg)!important;color:var(--text)!important}.cs-callout{padding:1.25rem 1.5rem;color:var(--text)!important;background:var(--surface-brand-subtle);border-left:3px solid var(--surface-brand);border-radius:0 var(--radius-md) var(--radius-md) 0}.cs-quote{max-width:49rem;margin:0 auto 2rem;padding:0 0 0 1.5rem;border-left:3px solid var(--border-strong)}.cs-quote p{margin-bottom:.75rem;font-size:var(--text-xl);line-height:1.5;color:var(--text)}.cs-quote footer{font-size:var(--text-sm);color:var(--text-subtle)}.cs-wide{margin-top:2.5rem;margin-bottom:.75rem;box-shadow:var(--shadow-md)}.cs-grid-2{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2.5rem var(--cs-gap);margin:2.5rem 0 var(--cs-fig)}.cs-grid-2 figure{margin:0}.cs-grid-2 figcaption{margin-bottom:0}.cs-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:var(--cs-gap);margin:2.5rem 0 0;padding:1.5rem 0;list-style:none;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}.cs-stats li{font-size:var(--text-sm);text-align:center;color:var(--text-muted)}.cs-stats strong{display:block;font-size:var(--text-4xl);line-height:1.1;letter-spacing:-.02em;color:var(--text)}.cs-footer{display:flex;flex-wrap:wrap;gap:1rem;justify-content:center;padding:4rem 0 0;border-top:1px solid var(--border)}.cs-cta{padding:.9rem 1.6rem;font-size:var(--text-sm);font-weight:600;color:var(--text-on-brand);text-decoration:none;background:var(--surface-brand);border:1px solid var(--surface-brand);border-radius:var(--radius-full)}.cs-cta:hover{background:var(--surface-brand-hover)}.cs-cta:focus-visible{outline:2px solid var(--focus-ring);outline-offset:2px}.cs-cta--ghost{color:var(--text);background:transparent;border-color:var(--border-strong)}.cs-cta--ghost:hover{background:var(--surface-muted)}@media(max-width:640px){.cs-back-label{display:none}.cs{padding-top:5rem}.cs-hero h1{font-size:var(--text-4xl)}.cs-meta{display:grid;grid-template-columns:1fr 1fr;gap:1.25rem}.cs-stats{grid-template-columns:1fr 1fr}}.fx .cs-hero h1{text-wrap:balance}.fx .cs-hero h1 span{display:block;text-wrap:balance}.fx-eval{max-width:49rem;margin:0 auto var(--cs-fig)}.fx-eval ul{display:grid;gap:.75rem;margin:0 0 1rem;padding:0;list-style:none}.fx-eval li{display:grid;grid-template-columns:1fr auto;gap:.4rem 1.5rem;padding:1.25rem 1.4rem;background:var(--surface-subtle);border:1px solid var(--border);border-left:3px solid var(--border-strong);border-radius:var(--radius-lg)}.fx-eval li[data-outcome=win]{border-left-color:var(--surface-brand);background:var(--surface-brand-subtle)}.fx-eval li[data-outcome=void]{opacity:.72}.fx-eval figcaption{margin-bottom:0}.fx-eval-model{grid-column:1;max-width:none!important;margin:0!important;font-size:var(--text-base)!important;font-weight:600;line-height:1.3;color:var(--text)!important}.fx-eval-model span{font-family:var(--font-mono);font-size:var(--text-xs);font-weight:400;color:var(--text-subtle)}.fx-eval-verdict{grid-column:1;max-width:none!important;margin:0!important;font-size:var(--text-sm)!important;line-height:1.55}.fx-eval-numbers{grid-row:1/span 2;grid-column:2;display:flex;gap:1.5rem;margin:0;text-align:right}.fx-eval-numbers dt{font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:.08em;text-transform:uppercase;color:var(--text-subtle)}.fx-eval-numbers dd{margin:.15rem 0 0;font-size:var(--text-lg);line-height:1.2;color:var(--text)}.fx-bugs{max-width:49rem;margin:0 auto var(--cs-fig);padding:0;list-style:none;counter-reset:bug}.fx-bugs li{padding:2rem 0;border-top:1px solid var(--border);counter-increment:bug}.fx-bugs li:last-child{border-bottom:1px solid var(--border)}.fx-bug-symptom{max-width:none!important;margin:0 0 .9rem!important;font-size:var(--text-lg)!important;line-height:1.45;color:var(--text)!important}.fx-bug-symptom:before{content:counter(bug,decimal-leading-zero) "  ";font-family:var(--font-mono);font-size:var(--text-xs);color:var(--text-subtle)}.fx-bug-mechanism{max-width:none!important;margin:0 0 .9rem!important}.fx-bug-fix{max-width:none!important;margin:0!important;font-size:var(--text-sm)!important;color:var(--text-subtle)!important}.fx-bug-delta{display:flex;flex-wrap:wrap;gap:.9rem;align-items:baseline;max-width:none!important;margin:1.5rem 0 0!important;font-family:var(--font-mono)}.fx-delta-before{font-size:var(--text-2xl);color:var(--text-subtle);text-decoration:line-through;text-decoration-thickness:1px}.fx-delta-arrow{color:var(--text-subtle)}.fx-delta-after{font-size:var(--text-4xl);line-height:1.1;letter-spacing:-.02em;color:var(--text-brand)}.fx-upstream{max-width:49rem;margin:2.5rem auto var(--cs-fig);padding:1.75rem;background:var(--surface-subtle);border:1px solid var(--border-strong);border-radius:var(--radius-lg)}.fx-upstream-repo{max-width:none!important;margin:0 0 .35rem!important;font-family:var(--font-mono);font-size:var(--text-lg)!important}.fx-upstream-repo a{color:var(--text)!important;text-decoration:none;border-bottom:1px solid var(--border-strong)}.fx-upstream-repo a:hover{color:var(--text-brand)!important;border-bottom-color:currentcolor}.fx-upstream-repo a:focus-visible{outline:2px solid var(--focus-ring);outline-offset:3px}.fx-upstream-what{max-width:none!important;margin:0 0 1.5rem!important;font-size:var(--text-sm)!important}.fx-upstream-meta{display:flex;flex-wrap:wrap;gap:2rem;margin:0 0 1.5rem;padding:1.25rem 0 0;border-top:1px solid var(--border)}.fx-upstream-meta dt{font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:.08em;text-transform:uppercase;color:var(--text-subtle)}.fx-upstream-meta dd{margin:.25rem 0 0;font-size:var(--text-lg);color:var(--text)}.fx-upstream-links{display:flex;flex-wrap:wrap;gap:.75rem 1.5rem;max-width:none!important;margin:0!important;font-size:var(--text-sm)!important}.fx-upstream-links a{color:var(--text-brand);text-decoration:none;border-bottom:1px solid transparent}.fx-upstream-links a:hover{border-bottom-color:currentcolor}.fx-upstream-links a:focus-visible{outline:2px solid var(--focus-ring);outline-offset:3px}.fx-limits{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:var(--cs-gap);max-width:49rem;margin:2.5rem auto var(--cs-fig);padding:0;list-style:none}.fx-limits li:last-child:nth-child(odd){grid-column:1/-1}.fx-limits li{padding:1.5rem;background:var(--surface-subtle);border:1px solid var(--border);border-radius:var(--radius-lg)}.fx-limits h3{margin:0 0 .6rem;font-size:var(--text-base);line-height:1.35;color:var(--text)}.fx-limits p{max-width:none!important;margin:0!important;font-size:var(--text-sm)!important}.fx-arch{margin:3rem 0 0;padding:2rem;border:1px solid var(--border);border-radius:var(--radius-lg);background:var(--surface-subtle)}.fx-arch .fx-arch-entry{margin:0;font-size:var(--text-lg);font-weight:600;color:var(--text)}.fx-arch .fx-arch-via{margin:.2rem 0 .9rem;font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:.08em;text-transform:uppercase;color:var(--text-subtle)}.fx-arch .fx-arch-name{margin:0 0 .85rem;font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:.1em;text-transform:uppercase;color:var(--text-brand)}.fx-arch .fx-arch-step{margin:0;font-size:var(--text-base);font-weight:600;color:var(--text)}.fx-arch .fx-arch-detail{margin:.15rem 0 0;font-size:var(--text-sm);line-height:var(--leading-snug);color:var(--text-muted)}.fx-arch figcaption{margin:2rem 0 0;padding-top:1.25rem;border-top:1px solid var(--border);font-size:var(--text-sm);line-height:var(--leading-relaxed);color:var(--text-subtle)}.fx-arch-lanes{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem}.fx-arch-lane{position:relative;display:flex;flex-direction:column;padding-bottom:1.25rem;text-align:center}.fx-arch-lane:after{content:"";position:absolute;left:50%;bottom:0;width:1px;height:1.25rem;background:var(--border-strong)}.fx-arch-card{flex:1;padding:1.25rem;text-align:left;border:1px solid var(--border);border-radius:var(--radius-md);background:var(--surface)}.fx-arch-card ul{margin:0;padding:0;list-style:none}.fx-arch-card li{position:relative;padding-left:1rem;font-size:var(--text-sm);line-height:var(--leading-snug);color:var(--text-muted)}.fx-arch-card li+li{margin-top:.6rem}.fx-arch-card li:before{content:"";position:absolute;left:0;top:.55em;width:5px;height:5px;border-radius:50%;background:var(--border-strong)}.fx-arch-merge{position:relative;height:2rem;margin:0}.fx-arch-merge:before{content:"";position:absolute;left:calc(25% - .375rem);right:calc(25% - .375rem);top:0;height:1px;background:var(--border-strong)}.fx-arch-merge:after{content:"";position:absolute;left:50%;top:0;width:1px;height:2rem;background:var(--border-strong)}.fx-arch-stack{max-width:30rem;margin:0 auto;padding:0;list-style:none}.fx-arch-stack li{position:relative;padding:.85rem 1.25rem;text-align:center;border:1px solid var(--border);border-radius:var(--radius-md);background:var(--surface)}.fx-arch-stack li+li{margin-top:1.5rem}.fx-arch-stack li+li:before{content:"";position:absolute;left:50%;top:-1.5rem;width:1px;height:1.5rem;background:var(--border-strong)}.fx-arch-stack li:last-child{border-color:var(--border-strong);border-style:dashed}@media(max-width:640px){.fx-eval li{grid-template-columns:1fr;gap:.4rem}.fx-eval-numbers{grid-row:auto;grid-column:1;margin-top:.75rem;text-align:left}.fx-upstream-meta{gap:1.25rem}.fx-arch{padding:1.25rem}.fx-arch-lanes{grid-template-columns:1fr;gap:1.5rem}.fx-arch-lane:after,.fx-arch-merge:before{display:none}.fx-arch-lane{padding-bottom:0}.fx-arch-merge{height:1.75rem}.fx-arch-merge:after{height:1.75rem}}