.toc-rail{--toc-rail-accent:#197ca8;--toc-rail-line:#181f2424;--toc-rail-muted:#181f249e;--toc-rail-faint:#181f2457;--toc-rail-text:#181f24;--toc-rail-title:#181f2461;--toc-rail-width:184px;--toc-rail-top:max(116px, 24vh);--toc-rail-right:2rem;--toc-rail-left:auto;--toc-rail-z-index:20;--toc-rail-font-family:system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--toc-rail-title-size:.6875rem;--toc-rail-link-size:.6875rem;--toc-rail-link-weight:500;--toc-rail-link-line-height:1.3;--toc-rail-link-indent:.75rem;--toc-rail-link-nested-indent:1.25rem;--toc-rail-panel-bottom-gap:clamp(1.5rem, 5vh, 5rem);--toc-rail-list-bottom-gap:clamp(1.5rem, 5vh, 180px);--toc-rail-list-end-space:clamp(1rem, 4vh, 3.5rem);--toc-rail-duration-fast:.15s;--toc-rail-duration-normal:.25s;--toc-rail-fade-duration:.5s;--toc-rail-ease-out:cubic-bezier(0, 0, .58, 1);--toc-rail-fade-transition:var(--toc-rail-fade-duration) var(--toc-rail-ease-out);--toc-rail-base-opacity:.72;--toc-rail-edge-opacity:1;--toc-rail-edge-offset:0px;--toc-rail-edge-translate:8px;--toc-rail-visibility-delay:0s;--_toc-rail-progress-floor:.012;--_toc-rail-viewport-height:100dvh;--_toc-rail-panel-height:max(0px, calc(var(--_toc-rail-viewport-height) - var(--toc-rail-top) - var(--toc-rail-panel-bottom-gap)));--_toc-rail-list-height:max(0px, min(var(--_toc-rail-panel-height), calc(var(--_toc-rail-viewport-height) - var(--toc-rail-top) - var(--toc-rail-list-bottom-gap))));top:var(--toc-rail-top);right:var(--toc-rail-right);left:var(--toc-rail-left);z-index:var(--toc-rail-z-index);width:var(--toc-rail-width);color:var(--toc-rail-text);font-family:var(--toc-rail-font-family);opacity:calc(var(--toc-rail-base-opacity) * var(--toc-rail-edge-opacity));transform:translateY(var(--toc-rail-edge-offset));visibility:visible;transition:opacity var(--toc-rail-fade-transition), transform var(--toc-rail-fade-transition), visibility 0s linear var(--toc-rail-visibility-delay);position:fixed}.toc-rail[hidden]{display:none}.toc-rail.is-initializing{opacity:0;visibility:hidden;transition:none}.toc-rail:focus-within,.toc-rail:hover,.toc-rail.is-scrolling{--toc-rail-base-opacity:1}.toc-rail.is-before-content,.toc-rail[data-toc-rail-state=hidden-before]{--toc-rail-visibility-delay:var(--toc-rail-fade-duration);opacity:0;pointer-events:none;transform:translateY(var(--toc-rail-edge-translate));visibility:hidden}.toc-rail.is-after-content,.toc-rail[data-toc-rail-state=hidden-after]{--toc-rail-visibility-delay:var(--toc-rail-fade-duration);pointer-events:none;visibility:hidden}.toc-rail__panel{max-height:var(--_toc-rail-panel-height);flex-direction:column;gap:.75rem;display:flex;overflow:clip}.toc-rail__title{color:var(--toc-rail-title);font-size:var(--toc-rail-title-size);letter-spacing:.08em;text-transform:uppercase;margin:0 0 0 .75rem;font-weight:700;line-height:1}.toc-rail__wrap{min-height:0;max-height:var(--_toc-rail-list-height);flex-direction:column;display:flex;position:relative;overflow:hidden}.toc-rail[data-toc-rail-mode=progress] .toc-rail__wrap{height:var(--_toc-rail-list-height)}.toc-rail__progress{top:4px;bottom:calc(4px + var(--toc-rail-list-end-space));background:var(--toc-rail-line);pointer-events:none;width:1px;position:absolute;left:0}.toc-rail__progress-fill{background:var(--toc-rail-accent);opacity:.9;width:100%;transform:scaleY(max(var(--toc-rail-progress,0), var(--_toc-rail-progress-floor)));transform-origin:top;transition:transform var(--toc-rail-duration-fast) linear;position:absolute;inset:0}.toc-rail.is-scrolling .toc-rail__progress-fill{transition:none}.toc-rail__list{max-height:var(--_toc-rail-list-height);min-height:0;padding:0 0 var(--toc-rail-list-end-space);scrollbar-width:none;flex-direction:column;flex:auto;gap:2px;margin:0;list-style:none;display:flex;overflow:auto}.toc-rail__list::-webkit-scrollbar{width:0;height:0}.toc-rail__item{min-width:0}.toc-rail__link{padding:4px 0 4px var(--toc-rail-link-indent);-webkit-line-clamp:2;color:var(--toc-rail-muted);font-size:var(--toc-rail-link-size);font-weight:var(--toc-rail-link-weight);line-height:var(--toc-rail-link-line-height);word-break:keep-all;transition:border-color var(--toc-rail-duration-fast) var(--toc-rail-ease-out), color var(--toc-rail-duration-fast) var(--toc-rail-ease-out);border-left:1px solid #0000;-webkit-box-orient:vertical;text-decoration:none;display:-webkit-box;overflow:hidden}.toc-rail__item--h3 .toc-rail__link,.toc-rail__item--h4 .toc-rail__link,.toc-rail__item--h5 .toc-rail__link,.toc-rail__item--h6 .toc-rail__link{padding-left:var(--toc-rail-link-nested-indent);color:var(--toc-rail-faint)}.toc-rail__item.is-active .toc-rail__link,.toc-rail__item[data-toc-rail-active=true] .toc-rail__link{color:var(--toc-rail-accent)}.toc-rail__link:hover{color:var(--toc-rail-text);opacity:1}.toc-rail__link:focus-visible{outline:2px solid var(--toc-rail-accent);outline-offset:3px}@media (prefers-reduced-motion:reduce){.toc-rail,.toc-rail__link,.toc-rail__progress-fill{transition:none}}[data-theme=dark] .toc-rail{--toc-rail-accent:#60a5fa;--toc-rail-line:#ffffff1f;--toc-rail-muted:#ffffffa6;--toc-rail-faint:#ffffff59;--toc-rail-text:#e2e8f0;--toc-rail-title:#fff6}.post-main{--post-meta-size:var(--text-footnote);max-width:var(--max-width-wide);padding:var(--space-20) var(--space-6) var(--space-24);margin:0 auto}.back-link,.post-header,.post-divider,.prose{max-width:var(--max-width-content)}.back-link{font-size:var(--text-footnote);color:var(--label-tertiary);margin-bottom:var(--space-10);transition:color var(--duration-fast) var(--ease-out);letter-spacing:.01em;align-items:center;font-weight:500;text-decoration:none;display:inline-flex}.back-link:hover{color:var(--color-blue);opacity:1}.post-header{padding-bottom:var(--space-8)}.post-accent{background:var(--color-blue);width:32px;height:3px;margin-bottom:var(--space-6);border-radius:99px}.post-meta{align-items:center;gap:var(--space-2);font-size:var(--post-meta-size);color:var(--label-tertiary);margin-bottom:var(--space-5);display:flex}.meta-date{font-variant-numeric:tabular-nums}.dot,.meta-updated{color:var(--label-quaternary)}.post-title{letter-spacing:-.02em;margin:0 0 var(--space-5);color:var(--label-primary);text-shadow:0 0 #0000;font-size:2.5rem;font-weight:650;line-height:1.12}.post-description{font-size:var(--text-callout);color:var(--label-secondary);border-left:2px solid var(--separator);max-width:520px;padding-left:var(--space-4);margin:0;font-weight:400;line-height:1.64}.post-divider{background:var(--separator);height:1px;margin:var(--space-6) 0 var(--space-10)}.related-section{max-width:var(--max-width-content);margin-top:var(--space-12);padding-top:var(--space-10);border-top:1px solid var(--separator)}.related-header{justify-content:space-between;align-items:center;gap:var(--space-4);margin-bottom:var(--space-6);display:flex}.related-label{font-size:var(--text-caption-1);font-weight:var(--weight-accent-label);letter-spacing:.08em;text-transform:uppercase;color:var(--label-tertiary);margin:0}.related-view-all{font-size:var(--text-footnote);font-weight:var(--weight-accent-label);color:var(--color-blue);transition:text-shadow var(--duration-fast) var(--ease-out);text-decoration:none}.related-view-all:hover{opacity:1;text-shadow:0 0 .5px}.toc-rail{--toc-rail-accent:var(--color-blue);--toc-rail-line:#181f2424;--toc-rail-muted:var(--label-tertiary);--toc-rail-faint:var(--label-quaternary);--toc-rail-text:var(--label-primary);--toc-rail-title:var(--label-quaternary);--toc-rail-font-family:var(--font-sans);--toc-rail-link-size:var(--text-caption-2);--toc-rail-link-weight:var(--weight-medium);--toc-rail-nav-height:var(--nav-height,52px);--toc-rail-duration-fast:var(--duration-fast);--toc-rail-ease-out:var(--ease-out);--toc-rail-left:calc(50vw - var(--max-width-wide) / 2 + var(--space-6) + var(--max-width-content) + var(--space-8) + var(--space-4));--toc-rail-right:auto;--toc-rail-top:max(calc(var(--nav-height,52px) + var(--space-16)), 24vh);--toc-rail-width:160px}[data-theme=dark] .toc-rail,:root:not([data-theme=light]) .toc-rail{--toc-rail-accent:var(--color-blue);--toc-rail-line:color-mix(in srgb, var(--label-primary) 14%, transparent);--toc-rail-muted:var(--label-tertiary);--toc-rail-faint:var(--label-quaternary);--toc-rail-text:var(--label-primary);--toc-rail-title:var(--label-quaternary)}@supports (color:color-mix(in srgb, black 50%, transparent)){.toc-rail{--toc-rail-line:color-mix(in srgb, var(--label-primary) 14%, transparent)}}@media (width<=900px){.post-title{font-size:2.25rem}}@media (width<=600px){.post-main{padding:var(--space-12) var(--space-4) var(--space-16)}.post-title{font-size:2.08rem}}.lightbox{border-radius:var(--radius-xl);background:0 0;border:none;max-width:min(92vw,1200px);max-height:94dvh;padding:0;overflow:visible}.lightbox::backdrop{-webkit-backdrop-filter:blur(10px);background:#000000e0}.lightbox[open]{animation:.26s cubic-bezier(.22,1,.36,1) both lb-in}@keyframes lb-in{0%{opacity:0;transform:scale(.94)}to{opacity:1;transform:scale(1)}}.lightbox-inner{flex-direction:column;align-items:center;gap:12px;display:flex;position:relative}.lightbox-close{-webkit-backdrop-filter:blur(6px);color:#fff;cursor:pointer;z-index:1;width:44px;height:44px;transition:background var(--duration-fast) var(--ease-out);background:#ffffff24;border:1px solid #ffffff40;border-radius:50%;justify-content:center;align-items:center;display:flex;position:absolute;top:-22px;right:-22px}.lightbox-close:hover{background:#ffffff42}.lightbox-img{border-radius:var(--radius-lg);object-fit:contain;max-width:min(90vw,1160px);max-height:86dvh;display:block;border:none!important}.lightbox-caption{font-size:var(--text-footnote);color:#ffffff8c;text-align:center;max-width:60ch;margin:0}.prose img.is-zoomable{cursor:zoom-in}:root[data-sf-effect=scroll-dark]{--scroll-focus-theme-transition:.32s cubic-bezier(.22, 1, .36, 1)}[data-sf-effect=scroll-dark] body,[data-sf-effect=scroll-dark] header,[data-sf-effect=scroll-dark] main,[data-sf-effect=scroll-dark] article,[data-sf-effect=scroll-dark] footer,[data-sf-effect=scroll-dark] nav{transition:background-color var(--scroll-focus-theme-transition), color var(--scroll-focus-theme-transition), border-color var(--scroll-focus-theme-transition)}[data-sf-effect=scroll-dark] .prose,[data-sf-effect=scroll-dark] .prose a,[data-sf-effect=scroll-dark] .prose strong,[data-sf-effect=scroll-dark] .prose h1,[data-sf-effect=scroll-dark] .prose h2,[data-sf-effect=scroll-dark] .prose h3,[data-sf-effect=scroll-dark] .prose h4,[data-sf-effect=scroll-dark] .prose code,[data-sf-effect=scroll-dark] .prose pre,[data-sf-effect=scroll-dark] .prose blockquote,[data-sf-effect=scroll-dark] .prose table,[data-sf-effect=scroll-dark] .prose .heading-anchor{transition:background-color var(--scroll-focus-theme-transition), color var(--scroll-focus-theme-transition), border-color var(--scroll-focus-theme-transition), text-decoration-color var(--scroll-focus-theme-transition), opacity var(--duration-fast) var(--ease-out)}[data-sf-effect=scroll-dark] .post-header,[data-sf-effect=scroll-dark] .post-title,[data-sf-effect=scroll-dark] .post-description,[data-sf-effect=scroll-dark] .post-divider,[data-sf-effect=scroll-dark] .back-link,[data-sf-effect=scroll-dark] .post-meta,[data-sf-effect=scroll-dark] .post-accent{transition:background-color var(--scroll-focus-theme-transition), color var(--scroll-focus-theme-transition), border-color var(--scroll-focus-theme-transition)}