:root{color-scheme:light;--ink:#172033;--muted:#58647a;--blue:#1649da;--line:#dce2ec;--paper:#fff;--wash:#f4f7fc;--width:1080px;color:var(--ink);background:var(--paper);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Noto Sans JP,Hiragino Kaku Gothic ProN,Yu Gothic,sans-serif;font-size:16px}*{box-sizing:border-box}body{margin:0;line-height:1.8}a{color:var(--blue);text-underline-offset:.22em}a:hover{text-decoration-thickness:2px}a:focus-visible{outline:3px solid var(--blue);outline-offset:5px;border-radius:2px}::selection{background:#dfe8ff}h1,h2,h3,p{margin-top:0}h1,h2,h3{overflow-wrap:anywhere;line-height:1.5}.wrap{width:min(var(--width),calc(100% - 80px));margin-inline:auto}.skip-link{z-index:10;background:#fff;padding:.5rem 1rem;position:fixed;top:-6rem;left:1rem}.skip-link:focus{top:1rem}.site-header{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:2rem;min-height:106px;display:flex}.brand{color:var(--ink);letter-spacing:.03em;align-items:center;gap:.8rem;font-size:1.2rem;font-weight:750;text-decoration:none;display:flex}.brand-mark{background:var(--blue);color:#fff;border-radius:4px;place-items:center;width:34px;height:38px;font:750 1.3rem/1 ui-monospace,monospace;display:grid}.site-header nav{gap:1.8rem;font-size:.9rem;display:flex}.site-header nav a{color:var(--muted);text-decoration:none}.site-header nav a[aria-current=page]{color:var(--blue)}.journal-intro{padding-top:64px;padding-bottom:54px}.eyebrow{letter-spacing:.12em;color:var(--blue);margin-bottom:1.25rem;font:650 .8rem/1.6 ui-monospace,SFMono-Regular,Consolas,monospace}.journal-intro h1{letter-spacing:.02em;margin-bottom:1.35rem;font-size:clamp(2.1rem,4.1vw,3.2rem);font-weight:750;line-height:1.5}.intro-copy{color:var(--muted);margin:0;font-size:1rem;line-height:1.95}.articles{padding-bottom:70px}.section-heading{border-top:3px solid var(--ink);border-bottom:1px solid var(--line);justify-content:space-between;align-items:baseline;padding:18px 0;display:flex}.section-heading h2{margin:0;font-size:1.05rem}.section-heading span{color:var(--muted);font-size:.875rem}.post-list{margin:0;padding:0;list-style:none}.post-row{border-bottom:1px solid var(--line);grid-template-columns:70px 1fr;gap:22px;padding:34px 0 38px;display:grid}.post-number{color:#8c98af;font:500 1.7rem/1.5 ui-monospace,monospace}.post-meta{color:var(--muted);align-items:center;gap:1rem;margin-bottom:.7rem;font-size:.875rem;display:flex}.post-row h3{margin-bottom:.8rem;font-size:clamp(1.25rem,2.4vw,1.7rem)}.post-row h3 a{color:var(--ink);text-decoration:none}.post-row h3 a:hover{color:var(--blue)}.post-row p{max-width:720px;color:var(--muted);margin-bottom:1rem}.tags{flex-wrap:wrap;gap:.5rem;margin:0;padding:0;list-style:none;display:flex}.tags li{color:#35486a;background:var(--wash);border-radius:3px;padding:.2rem .65rem;font-size:.8rem}.draft{color:#754414;background:#fff1dc;border-radius:3px;padding:.1rem .5rem;font-size:.8rem}.empty{padding:2rem 0}.site-footer{border-top:1px solid var(--line);color:var(--muted);flex-wrap:wrap;gap:1.25rem;padding:28px 0 34px;font-size:.875rem;display:flex}.site-footer span:first-child{color:var(--ink);font-weight:700}.site-footer a{margin-left:auto}.article-shell{width:min(760px,100% - 80px);margin:54px auto 78px}.article-header{border-bottom:1px solid var(--line);margin-bottom:36px;padding-bottom:32px}.back-link{margin-bottom:2rem;font-size:.875rem;text-decoration:none;display:inline-block}.article-header h1,.about-page h1{letter-spacing:.01em;margin-bottom:1.15rem;font-size:clamp(1.8rem,3.4vw,2.6rem);line-height:1.55}.article-deck{color:var(--muted);margin-bottom:1.4rem;font-size:1.0625rem}.updated{color:var(--muted);margin:1rem 0 0;font-size:.875rem}.prose{overflow-wrap:anywhere;font-size:1.0625rem;line-height:2.05}.prose p{margin-bottom:1.45rem}.prose h2{border-left:4px solid var(--blue);margin:2.8rem 0 1rem;padding-left:1rem;font-size:1.5rem}.prose h3{margin:2rem 0 .8rem;font-size:1.2rem}.prose ul,.prose ol{margin-bottom:1.6rem;padding-left:1.55rem}.prose li{margin-bottom:.5rem}.prose strong{font-weight:750}.prose blockquote{background:var(--wash);border-left:3px solid var(--line);color:var(--muted);margin:1.5rem 0;padding:.75rem 1.2rem}.prose blockquote p:last-child{margin-bottom:0}.prose code{background:var(--wash);border-radius:3px;padding:.12em .35em;font:.9em/1.7 ui-monospace,SFMono-Regular,Consolas,monospace}.prose pre{border-radius:5px;padding:1.1rem 1.25rem;font-size:.9rem;overflow:auto}.prose pre code{background:0 0;padding:0}.prose table{border-collapse:collapse;width:100%;margin:1.5rem 0;font-size:.95rem;display:block;overflow:auto}.prose th,.prose td{border:1px solid var(--line);text-align:left;padding:.65rem .9rem}.prose th{background:var(--wash)}.prose img{max-width:100%;height:auto}.article-end{border-top:1px solid var(--line);margin-top:3rem;padding-top:1.6rem;font-size:.95rem}.about-page{min-height:55vh}.not-found{min-height:50vh}.not-found h1{font-size:1.8rem}.text-link{margin-top:1rem;display:inline-block}@media (width<=700px){.wrap{width:calc(100% - 40px)}.site-header{flex-direction:column;justify-content:center;align-items:flex-start;gap:.8rem;min-height:96px;padding:20px 0}.brand{font-size:1.1rem}.brand-mark{width:29px;height:32px}.site-header nav{gap:1.4rem;font-size:.875rem}.journal-intro{padding-top:38px;padding-bottom:36px}.journal-intro h1{font-size:clamp(1.5rem,6.6vw,2rem)}.desktop-break{display:none}.post-row{grid-template-columns:35px 1fr;gap:12px;padding:27px 0}.post-number{font-size:1.25rem}.post-row h3{font-size:1.3rem}.post-row p{font-size:.95rem}.articles{padding-bottom:44px}.article-shell{width:calc(100% - 40px);margin:32px auto 50px}.article-header h1,.about-page h1{font-size:1.85rem}.article-deck,.prose{font-size:1rem}.prose h2{font-size:1.35rem}.site-footer{gap:.8rem 1.2rem}.site-footer span:nth-child(2){flex-basis:100%}.site-footer a{margin-left:0}}.post-row:has(.post-thumbnail){grid-template-columns:50px minmax(0,300px) minmax(0,1fr);align-items:start}.post-summary{min-width:0}.post-thumbnail{background:var(--wash);border-radius:6px;margin-top:4px;display:block}.post-thumbnail img{border:1px solid var(--line);border-radius:6px;width:100%;height:auto;display:block}.article-cover{margin:2rem 0 0}.article-cover img{border:1px solid var(--line);border-radius:8px;width:100%;height:auto;display:block}.article-cover figcaption,.article-figure figcaption{color:var(--muted);margin-top:.7rem;font-size:.8rem;line-height:1.8}.prose .article-figure{margin:2rem 0}.article-figure img{width:100%;height:auto;margin-inline:auto;display:block}.article-figure.flow-diagram img{max-width:540px}.article-figure.official-logo{border:1px solid var(--line);border-radius:6px;padding:1.2rem}.article-figure.official-logo img{max-width:280px}.article-figure.official-logo figcaption{text-align:center}@media (width<=700px){.post-row:has(.post-thumbnail){grid-template-columns:35px minmax(0,1fr)}.post-row:has(.post-thumbnail) .post-number{grid-area:1/1}.post-thumbnail{grid-column:2;margin-top:0}.post-row:has(.post-thumbnail) .post-summary{grid-column:2}.article-cover{margin-top:1.5rem}}.home-page{--ink:#292925;--muted:#68685f;--blue:#a44735;--line:#deded6;--paper:#fcfcfa;--wash:#f3f3ed;background:var(--paper);color:var(--ink);font-family:Noto Sans JP Variable,system-ui,-apple-system,sans-serif}.home-page .site-layout{grid-template-columns:220px minmax(0,1fr);align-items:start;gap:0 76px;width:min(1140px,100% - 112px);min-height:100svh;margin-inline:auto;padding-block:58px 26px;display:grid}.home-page .site-header{border:0;flex-direction:column;grid-area:1/1/span 2;justify-content:flex-start;align-items:flex-start;gap:0;width:auto;min-height:0;margin:0;padding:0 20px 0 0;display:flex;position:sticky;top:58px}.home-page .brand{letter-spacing:-.025em;font-size:1.35rem;font-weight:650}.sidebar-intro{color:var(--muted);margin:24px 0 28px;font-size:.875rem;line-height:1.95}.home-page .site-header nav{flex-direction:column;align-items:flex-start;gap:4px;font-size:.875rem}.home-page .site-header nav a{color:var(--muted);padding-block:8px}.home-page .site-header nav a[aria-current=page]{color:var(--ink);text-decoration:underline;text-decoration-color:var(--blue);text-underline-offset:.5em;text-decoration-thickness:2px}.home-page .site-header nav a:hover{color:var(--blue)}.sidebar-signoff{color:var(--muted);margin:42px 0 0;font-size:.75rem}.home-page main{grid-column:2;min-width:0}.home-content{width:100%}.home-heading{border-bottom:1px solid var(--line);padding-bottom:24px}.home-heading>p{color:var(--muted);margin:0 0 30px;font-size:.9rem}.home-heading-line{justify-content:space-between;align-items:baseline;gap:20px;display:flex}.home-heading h1{letter-spacing:-.02em;margin:0;font-size:1.65rem;font-weight:550}.home-heading-line>span{color:var(--muted);font-size:.75rem}.home-posts{margin:0;padding:0;list-style:none}.home-note{border-bottom:1px solid var(--line);padding:32px 0 34px}.note-meta{color:var(--muted);flex-wrap:wrap;align-items:baseline;gap:8px 18px;margin-bottom:18px;font-size:.75rem;display:flex}.note-meta time{letter-spacing:.035em;font-family:ui-monospace,SFMono-Regular,Consolas,monospace}.note-body{align-items:start;gap:28px;display:grid}.note-with-image{grid-template-columns:minmax(0,1fr) 240px}.note-copy{min-width:0}.note-copy h2{letter-spacing:-.015em;text-wrap:balance;margin:-5px 0 16px;font-size:clamp(1.35rem,2.1vw,1.8rem);font-weight:550;line-height:1.65}.note-copy h2 a{color:var(--ink);text-decoration:none}.note-title-part{max-width:100%;display:inline-block}.note-copy h2 a:hover{color:var(--blue)}.note-copy>p{color:var(--muted);margin-bottom:18px;font-size:.9375rem;line-height:1.95}.note-tags{color:var(--muted);flex-wrap:wrap;gap:5px 14px;margin:0;padding:0;font-size:.75rem;list-style:none;display:flex}.note-read{margin-top:18px;padding-block:8px;font-size:.875rem;font-weight:600;display:inline-block}.note-visual{margin:0}.note-visual a,.note-visual img{width:100%;display:block}.note-visual img{height:auto}.note-visual figcaption{text-align:right;color:var(--muted);margin-top:6px;font-size:.6875rem}.note-outline{margin-top:30px}.note-outline h3{color:var(--muted);margin:0 0 12px;font-size:.75rem;font-weight:500}.note-outline ol{counter-reset:outline;margin:0;padding:0;list-style:none}.note-outline li{counter-increment:outline}.note-outline a{width:fit-content;color:var(--ink);align-items:baseline;gap:18px;padding-block:8px;font-size:.875rem;text-decoration:none;display:flex}.note-outline a:before{content:counter(outline, decimal-leading-zero);color:var(--muted);font:400 .75rem/1.8 ui-monospace,SFMono-Regular,Consolas,monospace}.note-outline a:hover{color:var(--blue);text-decoration:underline}.home-empty{color:var(--muted);padding-block:32px}.home-page .site-footer{border:0;grid-column:2;align-self:end;gap:10px 18px;width:auto;margin:34px 0 0;padding:0;font-size:.6875rem}.home-page .site-footer span:first-child{font-weight:500}.home-page ::selection{background:#f2ded6}@media (width<=1050px){.home-page .site-layout{grid-template-columns:190px minmax(0,1fr);gap:0 44px;width:calc(100% - 80px)}.home-page .brand{font-size:1.2rem}.note-with-image{grid-template-columns:minmax(0,1fr) 190px;gap:22px}}@media (width<=800px){.home-page .site-layout{grid-template-columns:minmax(0,1fr);gap:0;width:min(640px,100% - 48px);padding-block:30px 24px}.home-page .site-header{grid-area:auto/1;padding:0 0 28px;position:static}.home-page .brand{font-size:1.35rem}.sidebar-intro{margin:14px 0 12px;font-size:.8125rem}.sidebar-intro br{display:none}.home-page .site-header nav{flex-flow:wrap;gap:8px 22px;font-size:.8125rem}.sidebar-signoff{display:none}.home-page main,.home-page .site-footer{grid-column:1}.home-heading{border-top:1px solid var(--line);padding-block:26px 20px}.home-heading>p{margin-bottom:14px;font-size:.8125rem}.home-heading h1{font-size:1.4rem}.note-with-image{grid-template-columns:minmax(0,1fr) 210px}.note-copy h2{font-size:1.4rem}.home-page .site-footer{margin-top:28px}.home-page .site-footer span:nth-child(2){flex-basis:auto}.home-page .site-footer a{margin-left:auto}}@media (width<=540px){.home-page .site-layout{width:calc(100% - 40px);padding-top:26px}.home-page .site-header nav{gap:4px 18px}.home-note{padding-top:26px}.note-with-image{grid-template-columns:minmax(0,1fr);gap:22px}.note-copy h2{font-size:1.4rem}.note-visual{max-width:300px}.note-read{margin-top:12px}.note-outline{margin-top:26px}.note-outline a{gap:14px}.home-page .site-footer{gap:8px 14px}.home-page .site-footer span:nth-child(2){flex-basis:100%;order:3}}