@font-face{font-family:"Source Serif 4";font-style:normal;font-weight:600;font-display:swap;src:url(/fonts/source-serif-4/source-serif-4-latin-600.woff2)format("woff2");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;size-adjust:100%;ascent-override:92%;descent-override:24%;line-gap-override:0%}@font-face{font-family:"Source Serif 4";font-style:normal;font-weight:600;font-display:swap;src:url(/fonts/source-serif-4/source-serif-4-latin-ext-600.woff2)format("woff2");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;size-adjust:100%;ascent-override:92%;descent-override:24%;line-gap-override:0%}@font-face{font-family:Inter;font-style:normal;font-weight:400 700;font-display:swap;src:url(/fonts/inter/inter-latin-var.woff2)format("woff2");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;size-adjust:100%;ascent-override:90%;descent-override:22%;line-gap-override:0%}@font-face{font-family:Inter;font-style:normal;font-weight:400 700;font-display:swap;src:url(/fonts/inter/inter-latin-ext-var.woff2)format("woff2");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;size-adjust:100%;ascent-override:90%;descent-override:22%;line-gap-override:0%}:root{color-scheme:light;--paper-editorial:#eef1f5;--surface-editorial:#f9fbfc;--surface-editorial-2:#e3e9f0;--ink-editorial:#131a22;--ink-editorial-2:#41505d;--muted-editorial:#5a6975;--line-editorial:#cbd5df;--accent-editorial:#15486e;--accent-editorial-2:#0f6d82;--source-editorial:#2e6b52;--warn-editorial:#76561f;--paper:var(--paper-editorial);--surface:var(--surface-editorial);--surface-2:var(--surface-editorial-2);--surface-3:color-mix(in srgb, var(--surface-editorial-2) 76%, var(--line-editorial));--ink:var(--ink-editorial);--ink-2:var(--ink-editorial-2);--muted:var(--muted-editorial);--line:var(--line-editorial);--line-2:color-mix(in srgb, var(--line-editorial) 72%, var(--ink-editorial) 10%);--accent:var(--accent-editorial);--accent-2:var(--accent-editorial-2);--accent-soft:color-mix(in srgb, var(--accent-editorial) 11%, var(--surface-editorial));--on-accent:var(--surface-editorial);--gold:var(--warn-editorial);--gold-soft:color-mix(in srgb, var(--warn-editorial) 13%, var(--surface-editorial));--ok:var(--source-editorial);--warn:var(--warn-editorial);--bad:#9a3552;--code-bg:#101923;--code-ink:#edf6fb;--table-sticky-bg:color-mix(in srgb, var(--surface-editorial) 94%, var(--surface-editorial-2));--table-sticky-shadow:color-mix(in srgb, var(--ink-editorial) 18%, transparent);--table-card-bg:color-mix(in srgb, var(--surface-editorial) 92%, var(--surface-editorial-2));--table-card-label:var(--muted-editorial);--timeline-rail:color-mix(in srgb, var(--line-editorial) 74%, var(--accent-editorial-2));--timeline-date:var(--accent-editorial-2);--link-route:var(--accent-editorial);--link-peer:var(--accent-editorial-2);--link-system:#42586b;--link-underline-rest:color-mix(in srgb, var(--line-editorial) 70%, var(--accent-editorial) 30%);--link-underline-hover:var(--accent-editorial);--preview-bg:color-mix(in srgb, var(--surface-editorial) 96%, var(--paper-editorial));--preview-border:color-mix(in srgb, var(--line-editorial) 84%, var(--ink-editorial) 10%);--strong-ink:color-mix(in srgb, var(--ink-editorial) 88%, var(--accent-editorial) 12%);--discovery-border:color-mix(in srgb, var(--line-editorial) 88%, var(--ink-editorial) 8%);--discovery-kicker:var(--accent-editorial);--discovery-route:var(--muted-editorial);--browse-result-border:color-mix(in srgb, var(--line-editorial) 88%, var(--ink-editorial) 7%);--browse-excerpt:var(--ink-editorial-2);--browse-route:var(--muted-editorial);--search-excerpt:var(--ink-editorial-2);--sh-1:0 1px 2px #131a220f;--sh-2:0 5px 18px -8px #131a222e;--sh-3:0 18px 48px -18px #131a2242;--selection:#c6d8e8;--font-editorial-display:"Source Serif 4", "Iowan Old Style", "Palatino Linotype", "Yu Mincho", YuMincho, "Hiragino Mincho ProN", "Noto Serif JP", serif;--font-editorial-body-ja:"Hiragino Kaku Gothic ProN", "Yu Gothic", "Yu Gothic UI", "Noto Sans JP", system-ui, sans-serif;--font-editorial-body-en:"Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;--font-editorial-mono:"JetBrains Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;--font-display:var(--font-editorial-display);--font-body:var(--font-editorial-body-ja);--font-mono:var(--font-editorial-mono);--fs-editorial-kicker:.76rem;--fs-editorial-meta:.86rem;--fs-editorial-body:clamp(1rem, .98rem + .12vw, 1.0625rem);--fs-editorial-lead:clamp(1.12rem, 1.06rem + .28vw, 1.26rem);--fs-editorial-h2:clamp(1.42rem, 1.28rem + .58vw, 1.86rem);--fs-editorial-h1:clamp(2.2rem, 1.72rem + 1.85vw, 3.35rem);--fs-editorial-masthead:clamp(2.8rem, 2.05rem + 3vw, 5rem);--fs-xs:var(--fs-editorial-kicker);--fs-sm:var(--fs-editorial-meta);--fs-base:var(--fs-editorial-body);--fs-md:var(--fs-editorial-lead);--fs-lg:var(--fs-editorial-h2);--fs-xl:var(--fs-editorial-h2);--fs-2xl:var(--fs-editorial-h1);--fs-3xl:var(--fs-editorial-masthead);--lh-tight:1.14;--lh-head:1.18;--lh-body:1.78;--font-features-body:"kern", "liga", "palt";--sp-1:.25rem;--sp-2:.5rem;--sp-3:.75rem;--sp-4:1rem;--sp-5:1.5rem;--sp-6:2rem;--sp-7:3rem;--sp-8:4rem;--section-gap-editorial:clamp(3.5rem, 2.2rem + 4.5vw, 6.5rem);--gap-section:var(--section-gap-editorial);--r-sm:4px;--card-radius-editorial:6px;--r:var(--card-radius-editorial);--r-lg:var(--card-radius-editorial);--r-pill:999px;--hairline:1px solid var(--line-editorial);--measure-entry:44rem;--measure-lead:54rem;--rail-left:12.5rem;--rail-right:12rem;--chrome-height:64px;--w-reading:var(--measure-entry);--w-content:72rem;--w-wide:86rem;--header-h:var(--chrome-height);--ease:cubic-bezier(.2, .7, .2, 1);--dur:.18s}[data-theme=dark]{color-scheme:dark;--paper-editorial:#0e131a;--surface-editorial:#151c25;--surface-editorial-2:#1e2833;--ink-editorial:#e6edf3;--ink-editorial-2:#aeb9c4;--muted-editorial:#8492a0;--line-editorial:#2b3742;--accent-editorial:#5aa7d8;--accent-editorial-2:#4fb8c9;--source-editorial:#7fc59b;--warn-editorial:#d6b25e;--paper:var(--paper-editorial);--surface:var(--surface-editorial);--surface-2:var(--surface-editorial-2);--surface-3:color-mix(in srgb, var(--surface-editorial-2) 72%, var(--line-editorial));--ink:var(--ink-editorial);--ink-2:var(--ink-editorial-2);--muted:var(--muted-editorial);--line:var(--line-editorial);--line-2:color-mix(in srgb, var(--line-editorial) 76%, var(--ink-editorial) 12%);--accent:var(--accent-editorial);--accent-2:var(--accent-editorial-2);--accent-soft:color-mix(in srgb, var(--accent-editorial) 18%, var(--surface-editorial));--on-accent:var(--paper-editorial);--gold:var(--warn-editorial);--gold-soft:color-mix(in srgb, var(--warn-editorial) 18%, var(--surface-editorial));--ok:var(--source-editorial);--warn:var(--warn-editorial);--bad:#e58aa5;--code-bg:#0b1117;--code-ink:#e6eef3;--table-sticky-bg:color-mix(in srgb, var(--surface-editorial) 88%, var(--surface-editorial-2));--table-sticky-shadow:color-mix(in srgb, var(--ink-editorial) 24%, transparent);--table-card-bg:color-mix(in srgb, var(--surface-editorial) 84%, var(--surface-editorial-2));--table-card-label:var(--muted-editorial);--timeline-rail:color-mix(in srgb, var(--line-editorial) 72%, var(--accent-editorial-2));--timeline-date:var(--accent-editorial-2);--link-route:var(--accent-editorial);--link-peer:var(--accent-editorial-2);--link-system:#8ea4b6;--link-underline-rest:color-mix(in srgb, var(--line-editorial) 70%, var(--accent-editorial) 30%);--link-underline-hover:var(--accent-editorial);--preview-bg:color-mix(in srgb, var(--surface-editorial) 94%, var(--paper-editorial));--preview-border:color-mix(in srgb, var(--line-editorial) 82%, var(--ink-editorial) 14%);--strong-ink:color-mix(in srgb, var(--ink-editorial) 90%, var(--accent-editorial) 10%);--discovery-border:color-mix(in srgb, var(--line-editorial) 84%, var(--ink-editorial) 14%);--discovery-kicker:var(--accent-editorial);--discovery-route:var(--muted-editorial);--browse-result-border:color-mix(in srgb, var(--line-editorial) 82%, var(--ink-editorial) 10%);--browse-excerpt:var(--ink-editorial-2);--browse-route:var(--muted-editorial);--search-excerpt:var(--ink-editorial-2);--sh-1:0 1px 2px #0006;--sh-2:0 6px 20px -8px #0000008c;--sh-3:0 22px 54px -20px #000000b3;--selection:#1d4963}html[lang=ja]{--font-body:var(--font-editorial-body-ja);--lh-body:1.78;--measure-entry:44rem;--font-features-body:"kern", "liga", "palt"}html[lang=en]{--font-body:var(--font-editorial-body-en);--lh-body:1.65;--measure-entry:48rem;--font-features-body:"kern", "liga"}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 1rem)}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition-duration:.01ms!important;animation-duration:.01ms!important}}body{background:var(--paper);color:var(--ink);font-family:var(--font-body);font-size:var(--fs-base);line-height:var(--lh-body);font-feature-settings:var(--font-features-body);text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;flex-direction:column;min-height:100vh;margin:0;display:flex}::selection{background:var(--selection)}a{color:var(--accent-2);text-decoration-color:color-mix(in srgb, var(--accent) 40%, transparent);text-underline-offset:.15em}a:hover{text-decoration-color:var(--accent)}img{max-width:100%;height:auto}h1,h2,h3,h4{font-family:var(--font-display);font-weight:600;line-height:var(--lh-head);letter-spacing:0;color:var(--ink);text-wrap:balance}:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:var(--r-sm)}hr{border:none;border-top:1px solid var(--line);margin:var(--sp-6) 0}.container{width:100%;max-width:var(--w-content);margin-inline:auto;padding-inline:clamp(1rem,.4rem + 2.5vw,2rem)}.container--wide{max-width:var(--w-wide)}.site-main{flex:1 0 auto;width:100%;min-width:0}.eyebrow{font-family:var(--font-body);font-size:var(--fs-xs);letter-spacing:.12em;text-transform:uppercase;color:var(--accent);align-items:center;gap:.5em;margin:0 0 .6rem;font-weight:700;display:inline-flex}.eyebrow:before{content:"";opacity:.6;background:currentColor;width:1.6rem;height:1px}.section-title{font-size:var(--fs-xl);margin:0 0 var(--sp-4)}.muted{color:var(--muted)}.lead{font-size:var(--fs-md);color:var(--ink-2);max-width:var(--measure-lead);line-height:1.55}.site-header{z-index:50;background:color-mix(in srgb, var(--paper) 86%, transparent);backdrop-filter:saturate(1.4)blur(10px);border-bottom:1px solid var(--line);position:sticky;top:0}.site-header__inner{height:var(--header-h);max-width:var(--w-wide);align-items:center;gap:clamp(.75rem,.4rem + 1.4vw,1.75rem);margin-inline:auto;padding-inline:clamp(1rem,.4rem + 2.5vw,2rem);display:flex}.brand{color:var(--ink);font-family:var(--font-display);letter-spacing:0;white-space:nowrap;flex:none;align-items:baseline;gap:.7ch;font-size:1.32rem;font-weight:600;text-decoration:none;display:inline-flex}.brand>span{font-size:1.04em}.brand b{color:var(--accent);font-weight:600}.brand small{font-family:var(--font-body);letter-spacing:.18em;text-transform:uppercase;color:var(--muted);align-self:center;padding-left:.1rem;font-size:.62rem;font-weight:700}.site-nav{align-items:center;gap:clamp(.5rem,.2rem + 1vw,1.25rem);min-width:0;margin-right:auto;display:flex}.site-nav a{color:var(--ink-2);font-size:var(--fs-sm);white-space:nowrap;transition:color var(--dur) var(--ease), border-color var(--dur) var(--ease);border-bottom:2px solid #0000;padding:.36rem 0;font-weight:560;text-decoration:none}.site-nav a:hover,.site-nav a[aria-current=page]{color:var(--ink);border-bottom-color:var(--accent)}.header-tools{align-items:center;gap:.5rem;display:flex}@media (width<=1040px){.brand small{display:none}}@media (width<=720px){.site-header__inner{gap:.6rem;padding-inline:.65rem}.brand{font-size:1.16rem}.site-nav{overscroll-behavior-x:contain;scrollbar-width:none;flex:auto;overflow-x:auto}.site-nav::-webkit-scrollbar{display:none}.site-nav a{flex:none;font-size:.82rem}.header-tools{flex:none;gap:.25rem}.icon-btn{width:32px;height:32px}.lang-switch a{padding:.25rem .36rem}}.search-trigger{border:1px solid var(--line-2);border-radius:var(--r);background:var(--surface);height:34px;color:var(--muted);font:inherit;font-size:var(--fs-sm);cursor:pointer;transition:border-color var(--dur) var(--ease), color var(--dur) var(--ease);align-items:center;gap:.5rem;padding:0 .6rem;display:inline-flex}.search-trigger:hover{border-color:var(--accent);color:var(--ink-2)}.search-trigger kbd{font-family:var(--font-mono);border:1px solid var(--line-2);color:var(--muted);background:var(--surface-2);border-radius:4px;padding:.05rem .35rem;font-size:.7rem}.search-trigger .s-label{display:none}@media (width>=720px){.search-trigger .s-label{display:inline}}.icon-btn{border:1px solid var(--line-2);border-radius:var(--r);background:var(--surface);width:34px;height:34px;color:var(--ink-2);cursor:pointer;transition:border-color var(--dur) var(--ease), color var(--dur) var(--ease);place-items:center;display:inline-grid}.icon-btn:hover{border-color:var(--accent);color:var(--ink)}.icon-btn svg{width:17px;height:17px}.icon-btn .i-sun{display:none}[data-theme=dark] .icon-btn .i-sun{display:block}[data-theme=dark] .icon-btn .i-moon{display:none}.lang-switch{border:1px solid var(--line-2);border-radius:var(--r);background:var(--surface);align-items:center;display:inline-flex;overflow:hidden}.lang-switch a{color:var(--muted);font-size:var(--fs-xs);transition:background var(--dur) var(--ease), color var(--dur) var(--ease);padding:.3rem .5rem;font-weight:650;line-height:1.4;text-decoration:none}.lang-switch a+a{border-left:1px solid var(--line)}.lang-switch a:hover{color:var(--ink);background:var(--surface-2)}.lang-switch a.active{background:var(--accent);color:var(--on-accent)}.site-footer{border-top:1px solid var(--line);background:linear-gradient(180deg, color-mix(in srgb, var(--surface-2) 82%, transparent), var(--surface-2)), var(--surface-2);margin-top:var(--gap-section);flex-shrink:0}.site-footer__inner{max-width:var(--w-wide);padding:var(--sp-7) clamp(1rem, .4rem + 2.5vw, 2rem) var(--sp-6);gap:var(--sp-4);grid-template-columns:1.4fr 1fr;margin-inline:auto;display:grid}.site-footer__about{max-width:38rem}.site-footer__brand{font-family:var(--font-display);color:var(--ink);font-size:1.35rem;line-height:1}.site-footer__note{color:var(--muted);font-size:var(--fs-sm);max-width:34rem;margin:.4rem 0 0}.site-footer__links{flex-wrap:wrap;place-content:start flex-end;gap:.4rem 1.1rem;display:flex}.site-footer__links a{color:var(--ink-2);font-size:var(--fs-sm);text-decoration:none}.site-footer__links a:hover{color:var(--accent)}.site-footer__meta{border-top:1px solid var(--line);padding-top:var(--sp-4);color:var(--muted);font-size:var(--fs-xs);flex-wrap:wrap;grid-column:1/-1;justify-content:space-between;gap:.5rem;display:flex}@media (width<=640px){.site-footer__inner{grid-template-columns:1fr}.site-footer__links{justify-content:flex-start}}.chip{min-width:0;font-size:var(--fs-xs);color:var(--ink-2);background:var(--surface-2);border:1px solid var(--line);border-radius:var(--r-pill);white-space:nowrap;align-items:center;gap:.35em;padding:.15rem .6rem;font-weight:600;display:inline-flex}.chip--accent{color:var(--accent-2);background:var(--accent-soft);border-color:color-mix(in srgb, var(--accent) 30%, var(--line))}.chip--warn{color:var(--warn);background:var(--gold-soft);border-color:color-mix(in srgb, var(--warn) 35%, var(--line))}.chip a{color:inherit;text-decoration:none}.dot{background:currentColor;border-radius:50%;flex:none;width:.5em;height:.5em}.btn{min-width:0;min-height:2.5rem;font:inherit;font-weight:600;font-size:var(--fs-sm);cursor:pointer;border-radius:var(--r);border:1px solid var(--line-2);background:var(--surface);color:var(--ink);transition:transform var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);justify-content:center;align-items:center;gap:.5rem;padding:.6rem 1.1rem;text-decoration:none;display:inline-flex}.btn:hover{border-color:var(--accent)}.btn--primary{background:var(--accent);border-color:var(--accent);color:var(--on-accent)}.btn--primary:hover{background:var(--accent-2);border-color:var(--accent-2)}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);min-width:0;padding:var(--sp-4);color:var(--ink);box-shadow:var(--sh-1);transition:border-color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);flex-direction:column;gap:.4rem;text-decoration:none;display:flex}a.card:hover{border-color:color-mix(in srgb, var(--accent) 55%, var(--line));box-shadow:var(--sh-2);transform:translateY(-2px)}.card__kicker{font-size:var(--fs-xs);letter-spacing:.06em;text-transform:uppercase;color:var(--accent);font-weight:700}.card__title{font-family:var(--font-display);font-size:var(--fs-md);color:var(--ink);overflow-wrap:anywhere;line-height:1.25}.card__meta{font-size:var(--fs-xs);color:var(--muted);overflow-wrap:anywhere;flex-wrap:wrap;gap:.4rem .7rem;margin-top:auto;display:flex}.entry-discovery{margin-top:var(--sp-7);padding-top:var(--sp-5);border-top:1px solid var(--discovery-border)}.entry-discovery__head{margin-bottom:var(--sp-4);gap:.25rem;display:grid}.entry-discovery__kicker{color:var(--discovery-kicker);font-family:var(--font-mono);font-size:var(--fs-xs);letter-spacing:.08em;text-transform:uppercase;margin:0;font-weight:700}.entry-discovery h2{font-size:var(--fs-lg);margin:0}.entry-discovery__lanes{grid-template-columns:repeat(auto-fit,minmax(min(100%,13.5rem),1fr));gap:clamp(1rem,.6rem + 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