/*! Styles: Apache-2.0. Full notice in /assets/css/main.css */@layer reset,tokens,base,layout,components,utilities;@layer reset{*,*::before,*::after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;text-size-adjust:100%}body,h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd,ul,ol{margin:0}ul[class],ol[class]{padding:0;list-style:none}img,picture,svg,video,canvas,iframe,embed,object{display:block;max-width:100%}img,video{height:auto}img[width="1"][height="1"]{display:inline;width:1px;height:1px}iframe[width][height]{height:auto;aspect-ratio:16 / 9}input,button,textarea,select{font:inherit;color:inherit}button{background:none;border:0}table{border-collapse:collapse;border-spacing:0}@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:0.01ms !important;animation-iteration-count:1 !important;transition-duration:0.01ms !important;scroll-behavior:auto !important}}}@layer tokens{:root{--font-sans:system-ui,-apple-system,"Segoe UI","Helvetica Neue","Hiragino Sans","Hiragino Kaku Gothic ProN","Noto Sans JP","Yu Gothic UI",Meiryo,sans-serif;--font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono","Noto Sans Mono",monospace;--text-sm:clamp(0.833rem,0.806rem + 0.14vw,0.938rem);--text-base:clamp(1rem,0.966rem + 0.17vw,1.125rem);--text-md:clamp(1.2rem,1.13rem + 0.35vw,1.406rem);--text-lg:clamp(1.44rem,1.32rem + 0.58vw,1.758rem);--text-xl:clamp(1.728rem,1.55rem + 0.89vw,2.197rem);--text-2xl:clamp(2.074rem,1.81rem + 1.32vw,2.747rem);--leading-tight:1.25;--leading-snug:1.45;--leading-normal:1.8;--tracking-tight:-0.01em;--space-2xs:0.25rem;--space-xs:0.5rem;--space-sm:0.75rem;--space-md:1rem;--space-lg:clamp(1.5rem,1.3rem + 1vw,2rem);--space-xl:clamp(2rem,1.6rem + 2vw,3rem);--space-2xl:clamp(3rem,2.3rem + 3.5vw,5rem);--shell-max:1140px;--sidebar-width:300px;--column-gap:clamp(1.5rem,1rem + 2.5vw,3rem);--measure:74ch;--header-height:3.5rem;--brand-name-size:var(--text-md);--brand-name-weight:800;--radius-sm:4px;--radius-md:8px;--radius-lg:14px;--radius-pill:999px;--hairline:1px;--card-radius:var(--radius-md);--card-padding-block:var(--space-lg);--card-padding-inline:var(--space-lg);--card-gap:var(--space-lg);--ease:cubic-bezier(0.2,0,0.15,1);--duration-fast:120ms;--duration:220ms;--shadow-sm:0 1px 2px rgb(0 0 0 / 6%),0 1px 3px rgb(0 0 0 / 5%);--shadow-md:0 4px 12px rgb(0 0 0 / 8%),0 2px 4px rgb(0 0 0 / 5%);--shadow-lg:0 16px 40px rgb(0 0 0 / 18%);--z-header:100;--z-quickbar:200;--quickbar-height:3.5rem;--z-drawer:300;--z-toast:400;color-scheme:light;--color-bg:var(--brand-bg-light,#ffffff);--color-surface:var(--brand-surface-light,#f5f6f8);--color-band:var(--brand-band-light,#ffffff);--color-text:var(--brand-text-light,#1a1d21);--color-muted:var(--brand-muted-light,#5c6470);--color-link:var(--brand-link-light,#0b5bd3);--color-link-hover:var(--brand-link-hover-light,var(--color-accent));--color-accent:var(--brand-accent-light,#d64518);--color-border:var(--brand-border-light,#e3e6eb);--color-canvas:var(--brand-canvas-light,var(--color-surface));--color-on-accent:var(--brand-on-accent-light,#ffffff);--color-field-border:var(--brand-field-border-light,var(--color-muted));--color-code-bg:var(--color-surface);--color-mark:#fff3b0;--focus-ring:2px solid var(--color-link);--focus-offset:2px}@media (prefers-color-scheme:dark){:root:not([data-color-scheme="light"]){color-scheme:dark;--color-bg:var(--brand-bg-dark,#101318);--color-surface:var(--brand-surface-dark,#181c23);--color-band:var(--brand-band-dark,#101318);--color-text:var(--brand-text-dark,#e6e9ee);--color-muted:var(--brand-muted-dark,#99a2b0);--color-link:var(--brand-link-dark,#7fb0ff);--color-link-hover:var(--brand-link-hover-dark,var(--color-accent));--color-accent:var(--brand-accent-dark,#ff8a5c);--color-border:var(--brand-border-dark,#262c35);--color-canvas:var(--brand-canvas-dark,#0a0c10);--color-on-accent:var(--brand-on-accent-dark,#16181d);--color-field-border:var(--brand-field-border-dark,var(--color-muted));--color-mark:#5c4d12;--shadow-sm:0 1px 2px rgb(0 0 0 / 40%);--shadow-md:0 4px 12px rgb(0 0 0 / 45%);--shadow-lg:0 16px 40px rgb(0 0 0 / 60%)}}:root[data-color-scheme="dark"]{color-scheme:dark;--color-bg:var(--brand-bg-dark,#101318);--color-surface:var(--brand-surface-dark,#181c23);--color-band:var(--brand-band-dark,#101318);--color-text:var(--brand-text-dark,#e6e9ee);--color-muted:var(--brand-muted-dark,#99a2b0);--color-link:var(--brand-link-dark,#7fb0ff);--color-link-hover:var(--brand-link-hover-dark,var(--color-accent));--color-accent:var(--brand-accent-dark,#ff8a5c);--color-border:var(--brand-border-dark,#262c35);--color-canvas:var(--brand-canvas-dark,#0a0c10);--color-on-accent:var(--brand-on-accent-dark,#16181d);--color-field-border:var(--brand-field-border-dark,var(--color-muted));--color-mark:#5c4d12;--shadow-sm:0 1px 2px rgb(0 0 0 / 40%);--shadow-md:0 4px 12px rgb(0 0 0 / 45%);--shadow-lg:0 16px 40px rgb(0 0 0 / 60%)}}@layer base{html{font-family:var(--font-sans);scroll-behavior:smooth;scroll-padding-top:calc(var(--header-height) + var(--space-md))}body{min-height:100svh;background-color:var(--color-bg);color:var(--color-text);font-size:var(--text-base);line-height:var(--leading-normal);font-feature-settings:"palt" 1;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;overflow-wrap:break-word;word-break:normal;line-break:strict}h1,h2,h3,h4,h5,h6{line-height:var(--leading-tight);letter-spacing:var(--tracking-tight);font-weight:var(--heading-weight,700);text-wrap:balance}h1{font-size:var(--text-2xl)}h2{font-size:var(--text-xl)}h3{font-size:var(--text-lg)}h4{font-size:var(--text-md)}h5,h6{font-size:var(--text-base)}:lang(ja) :is(h1,h2,h3,h4,h5,h6){word-break:auto-phrase}p{text-wrap:pretty}a{color:var(--color-link);text-decoration-thickness:1px;text-underline-offset:0.18em;transition:color var(--duration-fast) var(--ease)}a:hover{color:var(--color-link-hover)}:focus-visible{outline:var(--focus-ring);outline-offset:var(--focus-offset);border-radius:var(--radius-sm)}::selection{background-color:var(--color-accent);color:var(--color-on-accent)}ul:not([class]),ol:not([class]){padding-inline-start:1.5em}li + li{margin-top:var(--space-2xs)}blockquote:not([class]){padding:var(--space-xs) 0 var(--space-xs) var(--space-md);border-inline-start:3px solid var(--color-border);color:var(--color-muted);font-style:normal}code,kbd,samp,pre{font-family:var(--font-mono);font-size:0.9em;font-variant-ligatures:none;font-feature-settings:normal}:not(pre) > code{padding:0.15em 0.4em;background-color:var(--color-code-bg);border:var(--hairline) solid var(--color-border);border-radius:var(--radius-sm);overflow-wrap:break-word;word-break:normal}pre{margin:0;padding:var(--space-md);overflow-x:auto;background-color:var(--color-code-bg);border:var(--hairline) solid var(--color-border);border-radius:var(--radius-md);line-height:var(--leading-snug);tab-size:2}pre code{padding:0;background:none;border:0;white-space:pre}kbd{padding:0.1em 0.45em;background-color:var(--color-surface);border:var(--hairline) solid var(--color-border);border-bottom-width:2px;border-radius:var(--radius-sm)}table{width:100%;font-size:var(--text-sm)}th,td{padding:var(--space-xs) var(--space-sm);border:var(--hairline) solid var(--color-border);text-align:start;vertical-align:top}thead th{background-color:var(--color-surface);font-weight:700;white-space:nowrap}caption{margin-block-end:var(--space-xs);color:var(--color-muted);font-size:var(--text-sm);text-align:start}hr{height:0;margin-block:var(--space-xl);border:0;border-top:var(--hairline) solid var(--color-border)}figure{margin:0}figcaption{margin-block-start:var(--space-xs);color:var(--color-muted);font-size:var(--text-sm);text-align:center}mark{background-color:var(--color-mark);color:inherit}abbr[title]{text-decoration:underline dotted;cursor:help}dt{font-weight:700}dd{margin-inline-start:1.5em}small{font-size:var(--text-sm)}input,textarea,select{max-width:100%;padding:0.55em 0.7em;background-color:var(--color-bg);border:var(--hairline) solid var(--color-field-border);border-radius:var(--radius-sm);transition:border-color var(--duration-fast) var(--ease)}input:focus,textarea:focus,select:focus{border-color:var(--color-link)}textarea{resize:vertical}[type="checkbox"],[type="radio"]{width:1em;height:1em;padding:0;accent-color:var(--color-link);vertical-align:-0.1em}}@layer layout{.shell{width:100%;max-width:var(--shell-max);margin-inline:auto;padding-inline:var(--space-md)}.layout{display:grid;grid-template-columns:minmax(0,1fr);gap:var(--column-gap);padding-block:var(--space-xl) var(--space-2xl);align-items:start}@media (min-width:60em){.layout--with-sidebar{grid-template-columns:minmax(0,1fr) var(--sidebar-width)}}.content{min-width:0}.sidebar{min-width:0}@keyframes sidebar-in{from{transform:translateX(1.5rem)}to{transform:translateX(0)}}@media (min-width:60em){html:not([data-sidebar-sticky="off"]) .sidebar__inner{position:sticky;top:calc(var(--header-height) + var(--space-md));max-height:calc(100svh - var(--header-height) - var(--space-lg));overflow-y:auto;overscroll-behavior:contain}}.flow > * + *{margin-block-start:var(--flow-space,var(--space-md))}}@layer components{.site-header{position:sticky;top:0;z-index:var(--z-header);background-color:color-mix(in srgb,var(--color-band) 88%,transparent);border-block-end:var(--hairline) solid var(--color-border);backdrop-filter:saturate(1.6) blur(10px);-webkit-backdrop-filter:saturate(1.6) blur(10px)}@supports not (backdrop-filter:blur(1px)){.site-header{background-color:var(--color-band)}}.site-header__inner{display:flex;flex-wrap:wrap;gap:var(--space-sm) var(--space-lg);align-items:center;justify-content:space-between;min-height:var(--header-height);padding-block:var(--space-xs)}.site-brand{display:flex;gap:var(--space-sm);align-items:center;min-width:0}.site-brand__logo{flex:0 0 auto;border-radius:var(--radius-sm)}.site-brand__name{margin:0;font-size:var(--brand-name-size);font-weight:var(--brand-name-weight);letter-spacing:var(--tracking-tight);line-height:1.2}.site-brand__name a{color:var(--color-text);text-decoration:none}.site-brand__name a:hover{color:var(--color-link-hover)}.site-brand__tagline{margin:0;color:var(--color-muted);font-size:var(--text-sm);line-height:1.3}@media (max-width:34em){.site-brand__tagline{display:none}}.site-nav__list{display:flex;flex-wrap:wrap;gap:var(--space-2xs) var(--space-xs);align-items:center;margin:0}.site-nav__item + .site-nav__item{margin:0}.site-nav__link{display:block;padding:var(--space-2xs) var(--space-sm);border-radius:var(--radius-pill);color:var(--color-text);font-size:var(--text-sm);font-weight:600;text-decoration:none;white-space:nowrap;transition:background-color var(--duration-fast) var(--ease),color var(--duration-fast) var(--ease)}.site-nav__link:hover{background-color:var(--color-surface)}.site-nav__link[aria-current="page"]{background-color:var(--color-accent);color:var(--color-on-accent)}@media (max-width:47.99em){.site-nav{display:none}}html[data-header-sticky="off"] .site-header{position:static;background-color:var(--color-band);backdrop-filter:none;-webkit-backdrop-filter:none}html[data-header-layout="stacked"] .site-header{overflow-x:clip;background-color:transparent;border-block-end:0;backdrop-filter:none;-webkit-backdrop-filter:none}html[data-header-layout="stacked"] .site-header__inner{display:block;padding-block:var(--space-md) 0;text-align:center}html[data-header-layout="stacked"] .site-brand{display:block}html[data-header-layout="stacked"] .site-brand > div{display:contents}html[data-header-layout="stacked"] .site-brand__logo{display:inline-block;margin-inline-end:var(--space-sm);vertical-align:middle}html[data-header-layout="stacked"] .site-brand__name{display:inline}html[data-header-layout="stacked"] .site-brand__tagline{display:block;margin-block-start:var(--space-xs)}html[data-header-layout="stacked"] .site-nav{margin-block-start:var(--space-md);margin-inline:calc(50% - 50vw);padding-inline:calc(50vw - 50%);background-color:var(--color-band);border-block:var(--hairline) solid var(--color-border)}html[data-header-layout="stacked"] .site-nav__list{justify-content:center;padding-block:var(--space-xs)}html[data-nav-style="plain"] .site-nav__link{border-radius:0;font-weight:400}html[data-nav-style="plain"] .site-nav__link:hover{background-color:transparent;color:var(--color-link-hover)}html[data-nav-style="plain"] .site-nav__link[aria-current="page"]{background-color:transparent;color:var(--color-text);box-shadow:inset 0 -2px 0 var(--color-accent)}.drawer{display:none}html[data-drawer-open] .drawer,html[data-sidebar-open] .sidebar{display:block;position:fixed;inset:0 0 var(--quickbar-height) 0;z-index:var(--z-drawer);background-color:rgb(0 0 0 / 45%)}html[data-drawer-open] .quickbar,html[data-sidebar-open] .quickbar{z-index:calc(var(--z-drawer) + 1)}html[data-drawer-open],html[data-sidebar-open]{overflow:hidden}.drawer__panel,html[data-sidebar-open] .sidebar__inner{position:absolute;inset-block:0;inset-inline-end:0;width:min(22rem,88vw);overflow-y:auto;overscroll-behavior:contain;padding:var(--space-lg);background-color:var(--color-bg);box-shadow:var(--shadow-lg);animation:sidebar-in var(--duration) var(--ease)}@media (prefers-reduced-motion:reduce){.drawer__panel,html[data-sidebar-open] .sidebar__inner{animation:none}}.drawer__panel .site-nav__list{flex-direction:column;align-items:stretch;gap:var(--space-2xs)}.drawer__panel .site-nav__link{display:block;padding:var(--space-sm) var(--space-md);font-size:var(--text-base)}.quickbar{position:fixed;inset-block-end:0;inset-inline:0;z-index:var(--z-quickbar);display:flex;padding-block-end:env(safe-area-inset-bottom);background-color:color-mix(in srgb,var(--color-band) 92%,transparent);border-block-start:var(--hairline) solid var(--color-border);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}@media (min-width:48em){.quickbar{display:none}}.quickbar__btn{display:flex;flex:1 1 0;flex-direction:column;gap:2px;align-items:center;justify-content:center;min-height:3.25rem;padding:var(--space-2xs);color:var(--color-text);font-size:0.688rem;line-height:1;text-decoration:none;cursor:pointer}.quickbar__btn:hover{color:var(--color-link-hover)}.quickbar__btn[aria-disabled="true"]{opacity:0.35;cursor:not-allowed}.quickbar__icon{width:1.35rem;height:1.35rem}.to-top{position:fixed;inset-block-end:var(--space-lg);inset-inline-end:var(--space-lg);z-index:var(--z-quickbar);display:grid;place-items:center;width:2.75rem;height:2.75rem;background-color:var(--color-bg);border:var(--hairline) solid var(--color-border);border-radius:var(--radius-pill);box-shadow:var(--shadow-md);color:var(--color-text);opacity:0;visibility:hidden;transform:translateY(0.5rem);transition:opacity var(--duration) var(--ease),transform var(--duration) var(--ease),visibility var(--duration) var(--ease);cursor:pointer}.to-top.is-visible{opacity:1;visibility:visible;transform:none}.to-top:hover{background-color:var(--color-accent);border-color:var(--color-accent);color:var(--color-on-accent)}@media (max-width:47.99em){.to-top{display:none}body{padding-block-end:3.5rem}}.site-search{display:flex;gap:var(--space-sm);align-items:baseline;padding-block-start:var(--space-lg)}.site-search__label{flex:0 0 auto;color:var(--color-muted);font-size:var(--text-sm);font-weight:700;white-space:nowrap}.site-search__field{flex:1 1 auto;min-width:0}@media (max-width:47.99em){.site-search__label{display:none}}.site-search{--pagefind-ui-primary:var(--color-link);--pagefind-ui-text:var(--color-text);--pagefind-ui-background:var(--color-bg);--pagefind-ui-border:var(--color-border);--pagefind-ui-tag:var(--color-surface);--pagefind-ui-border-width:var(--hairline);--pagefind-ui-border-radius:var(--radius-md);--pagefind-ui-font:var(--font-sans)}.breadcrumbs{margin-block-end:var(--space-sm);font-size:var(--text-sm);color:var(--color-muted)}.breadcrumbs__list{display:flex;flex-wrap:wrap;gap:var(--space-2xs) var(--space-xs);margin:0}.breadcrumbs__item + .breadcrumbs__item{margin:0}.breadcrumbs__item + .breadcrumbs__item::before{content:"/";margin-inline-end:var(--space-xs);color:var(--color-border)}.breadcrumbs a{color:inherit}.breadcrumbs a:hover{color:var(--color-link-hover)}.entry-nav{display:flex;flex-wrap:wrap;gap:var(--space-sm);justify-content:space-between;margin-block-start:var(--space-xl);padding-block-start:var(--space-lg);border-block-start:var(--hairline) solid var(--color-border)}.entry-nav__link{display:inline-flex;align-items:center;min-height:2.5rem;padding-inline:var(--space-md);border:var(--hairline) solid var(--color-border);border-radius:var(--radius-sm);color:var(--color-text);font-size:var(--text-sm);text-decoration:none}.entry-nav__link:hover{border-color:var(--color-link-hover);color:var(--color-link-hover)}.entry-nav__link--next{margin-inline-start:auto}.entry-nav__link:has(.entry-nav__title){display:flex;flex-direction:column;gap:var(--space-2xs);align-items:start;max-width:calc(50% - var(--space-sm) / 2);padding:var(--space-sm) var(--space-md)}.entry-nav__link--next:has(.entry-nav__title){align-items:end;text-align:end}.entry-nav__link:has(.entry-nav__title) .entry-nav__label{color:var(--color-muted);font-size:var(--text-sm)}.entry-nav__title{font-weight:600;line-height:var(--leading-snug)}.related{margin-block-start:var(--space-xl);padding:var(--space-lg);background-color:var(--color-surface);border-radius:var(--radius-md)}.related__title{margin-block-end:var(--space-sm);font-size:var(--text-sm);font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--color-muted)}.related__list{display:grid;grid-template-columns:minmax(0,1fr);gap:var(--space-xs);margin:0}.related__item + .related__item{margin:0;padding-block-start:var(--space-xs);border-block-start:var(--hairline) solid var(--color-border)}.related--rich .related__item{display:grid;grid-template-columns:auto minmax(0,1fr);gap:var(--space-md);align-items:start}@media (max-width:47.99em){.related--rich .related__item{grid-template-columns:minmax(0,1fr);gap:var(--space-xs)}}.related__thumb{margin:0}.related__thumb img{border-radius:var(--radius-sm);object-fit:cover}.related__excerpt{margin-block-start:var(--space-xs);color:var(--color-muted);font-size:var(--text-sm);line-height:var(--leading-snug)}.related--rich .related__item + .related__item{padding-block-start:var(--space-md)}.related__link{display:block;color:var(--color-text);font-size:var(--text-base);font-weight:700;line-height:var(--leading-snug);text-decoration:none}.related__link:hover{color:var(--color-link-hover)}.related__date{display:block;margin-block-start:var(--space-2xs);color:var(--color-muted);font-size:var(--text-sm);font-variant-numeric:tabular-nums}.entry__header{margin-block-end:var(--space-md)}.entry__title{font-size:var(--text-2xl);margin:0}.entry__meta{display:flex;flex-wrap:wrap;gap:var(--space-xs) var(--space-md);align-items:center;margin-block-end:var(--space-lg);padding-block-end:var(--space-md);border-block-end:var(--hairline) solid var(--color-border);color:var(--color-muted);font-size:var(--text-sm)}.meta-item{display:inline-flex;gap:var(--space-2xs);align-items:center}.meta-item__sep{margin-inline:-0.15em 0.35em}.meta-item__icon{width:1em;height:1em;flex:0 0 auto;opacity:0.75}.meta-item a{color:inherit}.meta-item a:hover{color:var(--color-link-hover)}.entry__content{max-width:var(--measure)}.entry__content > * + *,.entry__content :is(div,section,article,aside,blockquote,li) > * + *{margin-block-start:var(--space-md)}.entry__content :is(div,section,article,aside) > :first-child{margin-block-start:0}.entry__content :is(h2,h3,h4,h5,h6){margin-block-start:var(--space-lg);margin-block-end:var(--space-md)}.entry__content h2{margin-block-start:var(--space-xl);margin-block-end:var(--space-lg);padding-block-end:var(--space-xs);border-block-end:var(--heading-rule-width,2px) solid var(--color-accent)}html[data-heading-style="bar"] .entry__content h2{padding:var(--heading-bar-padding,var(--space-xs) var(--space-md));border-block-end:0;border-inline-start:var(--heading-bar-width,8px) solid var(--heading-bar-color,var(--color-border))}html[data-heading-style="plain"] .entry__content h2{padding-block-end:0;border-block-end:0}.entry__content > figure,.entry__content > pre,.entry__content > blockquote{margin-block-start:var(--space-lg)}.entry__content img{border-radius:var(--radius-md)}.entry__content > pre,.entry__content > .table-scroll,.entry__content > figure{max-width:none}.table-scroll{overflow-x:auto;overscroll-behavior-inline:contain}.author-card{display:flex;gap:var(--space-sm);align-items:center;margin-block-start:var(--space-xl);padding:var(--space-md);background-color:var(--color-surface);border-radius:var(--radius-md);font-size:var(--text-sm)}.author-card__icon{width:1.25rem;height:1.25rem;flex:0 0 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