:root{color-scheme:light dark;--bg:#F6F8F7;--bg-side:#EEF3F0;--bg-raise:#FFFFFF;--fg:#1B2320;--fg-muted:#5E6B66;--line:#D9E2DE;--accent:#C0FFEE;--accent-line:#8FD9C3;--link:#0E6E59;--link-hover:#0A5645;--focus:#0E6E59;--tab-active-bg:#C0FFEE;--tab-active-fg:#1B2320;--alert-info:#2B7FC7;--alert-success:#2E8B4A;--alert-warning:#B67A00;--alert-danger:#C7342B;--figure-mat:transparent;--ink-filter:none;--font-body:"M PLUS 2", "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;--font-mono:"IBM Plex Mono", ui-monospace, Menlo, Consolas, monospace;--radius:8px;--radius-s:4px;--side-w:272px;--prose-w:720px}@media(prefers-color-scheme:dark){:root{--bg:#0F1512;--bg-side:#161D19;--bg-raise:#1A231E;--fg:#E6E4DC;--fg-muted:#9AA39E;--line:#26302B;--accent:#C0FFEE;--accent-line:#C0FFEE;--link:#C0FFEE;--link-hover:#FFFFFF;--focus:#C0FFEE;--tab-active-bg:rgba(192, 255, 238, 0.12);--tab-active-fg:#C0FFEE;--alert-info:#7CB8F0;--alert-success:#7ED49A;--alert-warning:#F0C060;--alert-danger:#F08A82;--figure-mat:#F4F2EC;--ink-filter:invert(1)}}*,*::before,*::after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;background:var(--bg);color:var(--fg);font-family:var(--font-body);font-size:16px;line-height:1.7}img,svg,video{max-width:100%;height:auto}a{color:var(--link);text-decoration:none}a:hover{color:var(--link-hover);text-decoration:underline;text-underline-offset:.2em}button{font:inherit;color:inherit}:focus-visible{outline:2px solid var(--focus);outline-offset:2px}.skip-link{position:absolute;left:8px;top:-100px;z-index:100;padding:8px 12px;background:var(--bg-raise);color:var(--fg);border:1px solid var(--line);border-radius:var(--radius-s)}.skip-link:focus{top:8px}.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;animation:none!important;scroll-behavior:auto!important}}.shell{display:grid;grid-template-columns:var(--side-w)minmax(0,1fr);min-height:100vh}.sidebar{position:sticky;top:0;height:100vh;overflow-y:auto;overflow-x:hidden;background:var(--bg-side);border-right:1px solid var(--line);padding:24px 0 24px 20px;display:flex;flex-direction:column;gap:24px}.main-col{display:flex;flex-direction:column;min-width:0}.utility{display:flex;justify-content:flex-end;width:100%;padding:12px 56px 0}.main{width:100%;max-width:1100px;padding:16px 56px 64px}.topbar{display:none}.backdrop{display:none}@media(max-width:1023px){.shell{grid-template-columns:minmax(0,1fr)}.topbar{display:flex;align-items:center;justify-content:space-between;gap:8px;height:56px;padding:0 8px 0 16px;position:sticky;top:0;z-index:20;background:var(--bg-side);border-bottom:1px solid var(--line)}.utility{display:none}.sidebar{position:fixed;top:0;left:0;bottom:0;height:auto;width:min(320px,85vw);z-index:40;transform:translateX(-100%);visibility:hidden;transition:transform 200ms ease,visibility 0s linear 200ms}body.nav-open .sidebar{transform:none;visibility:visible;transition:transform 200ms ease,visibility 0s linear 0s}.backdrop{position:fixed;inset:0;background:color-mix(in srgb,var(--fg) 40%,transparent);z-index:30}body.nav-open .backdrop{display:block}body.nav-open{overflow:hidden}.main{padding:20px 16px 48px}}.brand{display:flex;align-items:center;gap:12px;color:var(--fg);padding-right:20px}.brand:hover{text-decoration:none}.brand-mark{width:44px;height:44px;flex:none}.ink{filter:var(--ink-filter)}.brand-text{display:flex;flex-direction:column;line-height:1.3}.brand-name{font-size:17px;font-weight:700}.brand-tagline{font-size:12px;color:var(--fg-muted)}.tabs,.subtabs{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}.tab{display:flex;align-items:center;gap:10px;min-height:44px;padding:0 16px;margin-right:-1px;color:var(--fg);font-size:15px;border:1px solid transparent;border-right:0;border-radius:var(--radius)0 0 var(--radius)}.tab:hover{background:color-mix(in srgb,var(--fg) 6%,var(--bg-side));text-decoration:none;color:var(--fg)}.tab.is-active{background:var(--tab-active-bg);color:var(--tab-active-fg);border-color:var(--accent-line);font-weight:700}.tab .icon{flex:none}.subtabs{margin:2px 0 6px}.subtab{display:flex;align-items:center;min-height:44px;padding:0 16px 0 46px;color:var(--fg-muted);font-size:14px;border-radius:var(--radius)0 0 var(--radius)}.subtab:hover{background:color-mix(in srgb,var(--fg) 6%,var(--bg-side));text-decoration:none;color:var(--fg)}.subtab.is-active{color:var(--tab-active-fg);background:var(--tab-active-bg);font-weight:700}.sidebar-foot{margin-top:auto;display:flex;flex-direction:column;gap:4px;padding-right:20px;font-size:12px;color:var(--fg-muted)}.topbar-brand{display:flex;align-items:center;gap:10px;color:var(--fg);font-weight:700;font-size:16px;min-height:44px;min-width:0;flex:auto}.topbar-brand:hover{text-decoration:none}.topbar-brand span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.topbar-actions{display:flex;align-items:center;gap:4px;flex:none}.icon-btn{width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;background:0 0;border:0;border-radius:var(--radius);cursor:pointer;color:var(--fg)}.icon-btn:hover{background:color-mix(in srgb,var(--fg) 8%,transparent)}.lang-switch{display:flex;align-items:center;gap:2px;font-size:14px}.lang-switch a{display:inline-flex;align-items:center;min-height:44px;padding:0 10px;color:var(--fg-muted);border-radius:var(--radius-s);white-space:nowrap}.lang-switch a:hover{color:var(--link)}.lang-switch a[aria-current=true]{color:var(--fg);font-weight:700}.lang-sep{color:var(--line);padding:0 4px;user-select:none}.hero{display:flex;flex-direction:column;gap:24px;padding:8px 0}.hero-title{margin:0;font-size:30px;line-height:1.4;font-weight:700}.hero-title p{margin:0}.hero-art{margin:0;width:100%;max-width:980px}.hero-art img{width:100%;height:auto;display:block}.tools{list-style:none;margin:0;padding:0}.tool{display:flex;flex-direction:column;gap:6px;padding:16px 0;border-bottom:1px solid var(--line)}.tool-name{display:inline-flex;align-items:center;min-height:44px;font-size:18px;font-weight:500;color:var(--fg)}.tool-name:hover{color:var(--link)}.tool-desc{margin:0;font-size:14px;line-height:1.8;color:var(--fg-muted)}.tool-howto{display:inline-flex;align-items:center;min-height:44px;font-size:14px}.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;padding:32px 0 12px;border-bottom:2px solid var(--fg)}.section-head h2{margin:0;font-size:20px;font-weight:700}.section-head a{font-size:14px}.post-list{list-style:none;margin:0;padding:0}.post-row{display:grid;grid-template-columns:112px minmax(0,1fr)auto;gap:20px;align-items:baseline;padding:18px 0;border-bottom:1px solid var(--line)}.post-row time{font-size:14px;color:var(--fg-muted)}.post-row-body{display:flex;flex-direction:column;gap:4px;min-width:0}.post-series{font-size:13px;color:var(--fg-muted)}.post-title{font-size:18px;font-weight:500;color:var(--fg);line-height:1.5}.post-title:hover{color:var(--link)}.post-summary{margin:0;font-size:14px;color:var(--fg-muted);line-height:1.7}.post-row-meta{font-size:12px;color:var(--fg-muted);white-space:nowrap}.empty{color:var(--fg-muted);padding:24px 0}.tags{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px}.tag{display:inline-flex;align-items:center;min-height:28px;padding:0 8px;font-size:12px;color:var(--fg-muted);background:color-mix(in srgb,var(--fg) 6%,var(--bg));border-radius:var(--radius-s)}.tag:hover{color:var(--link);text-decoration:none}@media(max-width:1023px){.hero{gap:16px}.hero-title{font-size:24px}.post-row{grid-template-columns:minmax(0,1fr);gap:6px}.post-row-meta{white-space:normal}}.progress{position:fixed;top:0;left:0;height:3px;width:100%;background:var(--link);transform:scaleX(0);transform-origin:left;z-index:50;transition:transform 100ms linear;border-radius:0;display:block;overflow:visible}.article-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:56px;align-items:start}.article{min-width:0;width:100%;max-width:var(--article-w,var(--prose-w));margin:0 auto}.main:has(.article-grid){max-width:none}.breadcrumb{display:flex;flex-wrap:wrap;gap:8px;font-size:14px;color:var(--fg-muted);margin-bottom:20px}.breadcrumb a{color:var(--fg-muted);display:inline-flex;align-items:center;min-height:32px}.article-head{margin-bottom:28px}.article-title{margin:0 0 16px;font-size:34px;line-height:1.4;font-weight:700}.post-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px 20px;font-size:14px;color:var(--fg-muted)}.toc-rail{display:none}.toc-sticky{position:sticky;top:24px}.toc-label{margin:0 0 8px;font-size:15px;font-weight:700}.toc ul,.toc-list ul{list-style:none;margin:0;padding:0}.toc>nav>ul{border-left:1px solid var(--line)}.toc li li a{padding-left:30px;font-size:13px}.toc a{display:flex;align-items:center;min-height:44px;padding:2px 8px 2px 14px;font-size:14px;line-height:1.5;color:var(--fg-muted);border-left:2px solid transparent;margin-left:-1px}.toc a:hover{color:var(--fg);text-decoration:none}.toc a.is-current{color:var(--fg);border-left-color:var(--link);background:color-mix(in srgb,var(--accent) 30%,transparent)}.toc-inline{margin:0 0 24px;border:1px solid var(--line);border-radius:var(--radius);padding:0 16px}.toc-inline summary{min-height:44px;display:flex;align-items:center;cursor:pointer;font-weight:700}.toc-inline .toc-list a{display:flex;align-items:center;min-height:44px;color:var(--fg-muted)}.toc-inline .toc-list ul ul a{padding-left:16px;font-size:14px}@media(min-width:1200px){.toc-rail{display:block}.toc-inline{display:none}.article-grid{--article-w:840px}.article-grid.has-toc{grid-template-columns:minmax(0,1fr)240px;gap:40px}}.prev-next{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:40px;padding-top:24px;border-top:1px solid var(--line)}.prev-next-link{display:flex;flex-direction:column;gap:4px;min-height:44px;color:var(--fg)}.prev-next-link.next{text-align:right}.prev-next-link:hover{color:var(--link)}.prev-next-label{font-size:12px;color:var(--fg-muted)}.prev-next-title{font-size:16px}.comments{margin-top:48px;padding-top:24px;border-top:1px solid var(--line)}@media(max-width:1023px){.article-title{font-size:26px}.prev-next{grid-template-columns:minmax(0,1fr)}.prev-next-link.next{text-align:left}}.list-head{margin-bottom:8px}.list-head h1{margin:0 0 12px;font-size:30px;line-height:1.4}.month-group{margin-top:24px}.month-label{margin:0;padding-bottom:8px;font-size:15px;font-weight:700;color:var(--fg-muted);border-bottom:2px solid var(--fg)}.term-list{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:8px}.term-list li{display:inline-flex}.term-list a{display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:0 14px;border:1px solid var(--line);border-radius:var(--radius);color:var(--fg)}.term-list a:hover{background:var(--tab-active-bg);color:var(--tab-active-fg);text-decoration:none}.term-count{font-size:12px;color:var(--fg-muted)}.series-count{margin:0 0 8px;font-size:14px;color:var(--fg-muted)}.series-list{list-style:none;margin:0;padding:0;counter-reset:series}.series-list .post-row{grid-template-columns:44px minmax(0,1fr)auto}@media(max-width:1023px){.series-list .post-row{grid-template-columns:44px minmax(0,1fr)}}.series-no::before{counter-increment:series;content:counter(series);display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:50%;background:var(--tab-active-bg);color:var(--tab-active-fg);font-weight:700;font-size:14px}.not-found{max-width:var(--prose-w);padding:40px 0}.not-found h1{font-size:30px}.not-found-actions{display:flex;gap:12px;flex-wrap:wrap}.button{display:inline-flex;align-items:center;min-height:44px;padding:0 20px;border:1px solid var(--fg);border-radius:var(--radius);color:var(--fg)}.button:hover{background:var(--tab-active-bg);color:var(--tab-active-fg);text-decoration:none}.alert{display:grid;grid-template-columns:24px minmax(0,1fr);gap:14px;margin:1.2em 0;padding:14px 18px;border:1px solid;border-radius:var(--radius);background:var(--bg-raise);color:var(--fg)}.alert.no-icon{grid-template-columns:minmax(0,1fr)}.alert-icon{display:flex;margin-top:2px}.alert-body>:first-child{margin-top:0}.alert-body>:last-child{margin-bottom:0}.alert-body ul,.alert-body ol{margin:0}.alert-info{border-color:var(--alert-info);background:color-mix(in srgb,var(--alert-info) 10%,var(--bg-raise))}.alert-info .alert-icon{color:var(--alert-info)}.alert-success{border-color:var(--alert-success);background:color-mix(in srgb,var(--alert-success) 10%,var(--bg-raise))}.alert-success .alert-icon{color:var(--alert-success)}.alert-warning{border-color:var(--alert-warning);background:color-mix(in srgb,var(--alert-warning) 12%,var(--bg-raise))}.alert-warning .alert-icon{color:var(--alert-warning)}.alert-danger{border-color:var(--alert-danger);background:color-mix(in srgb,var(--alert-danger) 10%,var(--bg-raise))}.alert-danger .alert-icon{color:var(--alert-danger)}.figure.align-center{text-align:center}.figure.align-right{text-align:right}.arrow{margin:8px 0}.arrow img{width:64px;height:64px}.arrow-flip{transform:scale(1,-1)}.embed-link,.embed-frame,.embed-note,.embed-help{display:flex;justify-content:center;margin:8px 0}.embed-frame iframe{max-width:100%}.embed-note{font-size:12px;color:var(--fg-muted)}.embed-help-body{font-size:14px;overflow-x:auto}.prose{max-width:none;font-size:17px;line-height:1.95}.prose>:first-child{margin-top:0}.prose p{margin:0 0 1.4em}.prose h2,.prose h3,.prose h4{position:relative;line-height:1.5;font-weight:700;scroll-margin-top:80px}.prose h2{margin:2.2em 0 .9em;font-size:24px;padding-left:14px;border-left:4px solid var(--accent-line)}.prose h3{margin:1.8em 0 .7em;font-size:20px}.prose h4{margin:1.5em 0 .6em;font-size:17px}.heading-anchor{margin-left:.4em;font-weight:400;color:var(--line);opacity:0}.prose h2:hover .heading-anchor,.prose h3:hover .heading-anchor,.prose h4:hover .heading-anchor,.heading-anchor:focus-visible{opacity:1;color:var(--link)}.prose ul,.prose ol{padding-left:1.6em;margin:0 0 1.4em}.prose li{margin:.3em 0}.prose li>ul,.prose li>ol{margin-bottom:0}.prose blockquote{margin:0 0 1.4em;padding:.2em 1.2em;color:var(--fg-muted);border-left:3px solid var(--line)}.prose hr{border:0;height:1px;background:var(--line);margin:2.5em 0}.prose img{max-width:100%;height:auto}.prose figure{margin:1.6em 0}.prose figure img{display:block;margin:0 auto}.prose figure.figure-mat{padding:12px;background:var(--figure-mat);border-radius:var(--radius)}.prose figure.figure{display:block}.prose figcaption{margin-top:8px;font-size:13px;color:var(--fg-muted)}.prose table{display:block;width:100%;overflow-x:auto;border-collapse:collapse;margin:0 0 1.6em;font-size:15px}.prose th,.prose td{padding:8px 12px;border:1px solid var(--line);vertical-align:top}.prose th{background:var(--bg-side);font-weight:700}.prose code{font-family:var(--font-mono);font-size:.9em;background:var(--bg-side);padding:2px 6px;border-radius:var(--radius-s)}.prose pre{margin:0 0 1.6em;padding:16px 20px;overflow-x:auto;border-radius:var(--radius);font-family:var(--font-mono);font-size:14px;line-height:1.7}.prose pre code{background:0 0;padding:0;font-size:inherit}.prose .highlight pre .ln{margin-right:1em;color:rgba(255,255,255,.45);user-select:none}.prose .footnotes{margin-top:3em;font-size:14px;color:var(--fg-muted)}.prose .footnotes hr{margin:0 0 1em}a[target=_blank] .icon-external{margin-left:3px;vertical-align:-1px}.prose .goat,.prose .goat-scale{margin-left:auto;margin-right:auto}.prose .goat>svg{max-width:100%;height:auto}.prose details{margin:0 0 1.4em}.prose summary{cursor:pointer;min-height:44px;display:flex;align-items:center}.prose .katex-display{overflow-x:auto;overflow-y:hidden}@media print{.sidebar,.topbar,.utility,.progress,.toc-rail,.toc-inline,.comments,.prev-next,.skip-link{display:none!important}.shell{display:block}.main{max-width:none;padding:0}.prose{max-width:none}body{background:#fff;color:#000}a{color:#000;text-decoration:underline}}