@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+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,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+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,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+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,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+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,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 rgb(19 26 34 / .06);--sh-2: 0 5px 18px -8px rgb(19 26 34 / .18);--sh-3: 0 18px 48px -18px rgb(19 26 34 / .26);--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 rgb(0 0 0 / .4);--sh-2: 0 6px 20px -8px rgb(0 0 0 / .55);--sh-3: 0 22px 54px -20px rgb(0 0 0 / .7);--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}*{animation-duration:.01ms!important;transition-duration:.01ms!important}}body{margin:0;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;min-height:100vh;display:flex;flex-direction:column}::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{display:inline-flex;align-items:center;gap:.5em;margin:0 0 .6rem;font-family:var(--font-body);font-size:var(--fs-xs);font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--accent)}.eyebrow:before{content:"";width:1.6rem;height:1px;background:currentColor;opacity:.6}.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);line-height:1.55;max-width:var(--measure-lead)}.site-header{position:sticky;top:0;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)}.site-header__inner{height:var(--header-h);max-width:var(--w-wide);margin-inline:auto;padding-inline:clamp(1rem,.4rem + 2.5vw,2rem);display:flex;align-items:center;gap:clamp(.75rem,.4rem + 1.4vw,1.75rem)}.brand{display:inline-flex;align-items:baseline;gap:.7ch;flex:0 0 auto;text-decoration:none;color:var(--ink);font-family:var(--font-display);font-weight:600;font-size:1.32rem;letter-spacing:0;white-space:nowrap}.brand>span{font-size:1.04em}.brand b{color:var(--accent);font-weight:600}.brand small{font-family:var(--font-body);font-size:.62rem;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--muted);align-self:center;padding-left:.1rem}.site-nav{display:flex;align-items:center;gap:clamp(.5rem,.2rem + 1vw,1.25rem);margin-right:auto;min-width:0}.site-nav a{text-decoration:none;color:var(--ink-2);font-size:var(--fs-sm);font-weight:560;padding:.36rem 0;border-bottom:2px solid transparent;white-space:nowrap;transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease)}.site-nav a:hover,.site-nav a[aria-current=page]{color:var(--ink);border-bottom-color:var(--accent)}.header-tools{display:flex;align-items:center;gap:.5rem}@media(max-width:1040px){.brand small{display:none}}@media(max-width:720px){.site-header__inner{gap:.6rem;padding-inline:.65rem}.brand{font-size:1.16rem}.site-nav{flex:1 1 auto;overflow-x:auto;overscroll-behavior-x:contain;scrollbar-width:none}.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{display:inline-flex;align-items:center;gap:.5rem;height:34px;padding:0 .6rem;border:1px solid var(--line-2);border-radius:var(--r);background:var(--surface);color:var(--muted);font:inherit;font-size:var(--fs-sm);cursor:pointer;transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease)}.search-trigger:hover{border-color:var(--accent);color:var(--ink-2)}.search-trigger kbd{font-family:var(--font-mono);font-size:.7rem;padding:.05rem .35rem;border:1px solid var(--line-2);border-radius:4px;color:var(--muted);background:var(--surface-2)}.search-trigger .s-label{display:none}@media(min-width:720px){.search-trigger .s-label{display:inline}}.icon-btn{display:inline-grid;place-items:center;width:34px;height:34px;border:1px solid var(--line-2);border-radius:var(--r);background:var(--surface);color:var(--ink-2);cursor:pointer;transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease)}.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{display:inline-flex;align-items:center;border:1px solid var(--line-2);border-radius:var(--r);overflow:hidden;background:var(--surface)}.lang-switch a{text-decoration:none;color:var(--muted);font-size:var(--fs-xs);font-weight:650;padding:.3rem .5rem;line-height:1.4;transition:background var(--dur) var(--ease),color var(--dur) var(--ease)}.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{flex-shrink:0;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)}.site-footer__inner{max-width:var(--w-wide);margin-inline:auto;padding:var(--sp-7) clamp(1rem,.4rem + 2.5vw,2rem) var(--sp-6);display:grid;gap:var(--sp-4);grid-template-columns:1.4fr 1fr}.site-footer__about{max-width:38rem}.site-footer__brand{font-family:var(--font-display);font-size:1.35rem;line-height:1;color:var(--ink)}.site-footer__note{color:var(--muted);font-size:var(--fs-sm);max-width:34rem;margin:.4rem 0 0}.site-footer__links{display:flex;flex-wrap:wrap;gap:.4rem 1.1rem;align-content:start;justify-content:flex-end}.site-footer__links a{color:var(--ink-2);text-decoration:none;font-size:var(--fs-sm)}.site-footer__links a:hover{color:var(--accent)}.site-footer__meta{grid-column:1 / -1;border-top:1px solid var(--line);padding-top:var(--sp-4);color:var(--muted);font-size:var(--fs-xs);display:flex;flex-wrap:wrap;justify-content:space-between;gap:.5rem}@media(max-width:640px){.site-footer__inner{grid-template-columns:1fr}.site-footer__links{justify-content:flex-start}}.chip{display:inline-flex;align-items:center;gap:.35em;min-width:0;font-size:var(--fs-xs);font-weight:600;color:var(--ink-2);background:var(--surface-2);border:1px solid var(--line);border-radius:var(--r-pill);padding:.15rem .6rem;white-space:nowrap}.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{width:.5em;height:.5em;border-radius:50%;background:currentColor;flex:none}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;min-width:0;min-height:2.5rem;font:inherit;font-weight:600;font-size:var(--fs-sm);text-decoration:none;cursor:pointer;padding:.6rem 1.1rem;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)}.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{display:flex;flex-direction:column;gap:.4rem;min-width:0;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:var(--sp-4);text-decoration:none;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)}a.card:hover{border-color:color-mix(in srgb,var(--accent) 55%,var(--line));transform:translateY(-2px);box-shadow:var(--sh-2)}.card__kicker{font-size:var(--fs-xs);font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--accent)}.card__title{font-family:var(--font-display);font-size:var(--fs-md);line-height:1.25;color:var(--ink);overflow-wrap:anywhere}.card__meta{display:flex;flex-wrap:wrap;gap:.4rem .7rem;font-size:var(--fs-xs);color:var(--muted);margin-top:auto;overflow-wrap:anywhere}.entry-discovery{margin-top:var(--sp-7);padding-top:var(--sp-5);border-top:1px solid var(--discovery-border)}.entry-discovery__head{display:grid;gap:.25rem;margin-bottom:var(--sp-4)}.entry-discovery__kicker{margin:0;color:var(--discovery-kicker);font-family:var(--font-mono);font-size:var(--fs-xs);font-weight:700;letter-spacing:.08em;text-transform:uppercase}.entry-discovery h2{margin:0;font-size:var(--fs-lg)}.entry-discovery__lanes{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,13.5rem),1fr));gap:clamp(1rem,.6rem + 1.5vw,1.6rem)}.entry-discovery__lane{min-width:0}.entry-discovery__lane h3{margin:0 0 .45rem;color:var(--ink-2);font-family:var(--font-body);font-size:var(--fs-sm);font-weight:700;letter-spacing:0}.entry-discovery__list{display:grid;gap:0;list-style:none;margin:0;padding:0;border-top:1px solid var(--discovery-border)}.entry-card{display:grid;gap:.22rem;min-width:0;padding:.72rem 0;border-bottom:1px solid var(--discovery-border);color:var(--ink);text-decoration:none}.entry-card:hover .entry-card__title,.entry-card:focus-visible .entry-card__title{color:var(--accent-2)}.entry-card__meta{color:var(--muted);font-size:var(--fs-xs);line-height:1.35}.entry-card__title{color:var(--ink);font-family:var(--font-display);font-size:1rem;font-weight:600;line-height:1.25;overflow-wrap:anywhere;transition:color var(--dur) var(--ease)}.entry-card__lead{color:var(--ink-2);font-size:var(--fs-sm);line-height:1.45;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.entry-card__route{color:var(--discovery-route);font-family:var(--font-mono);font-size:.68rem;line-height:1.35;overflow-wrap:anywhere}@media(max-width:560px){.entry-card__lead{display:-webkit-box;white-space:normal;-webkit-box-orient:vertical;-webkit-line-clamp:2}}a.wl{color:var(--link-route);text-decoration-line:underline;text-decoration-thickness:1px;text-decoration-color:var(--link-underline-rest);text-underline-offset:.18em;transition:color var(--dur) var(--ease),text-decoration-color var(--dur) var(--ease)}a.wl:hover,a.wl:focus-visible{color:var(--ink);text-decoration-color:var(--link-underline-hover)}a.wl--peer{text-decoration-thickness:1.5px;text-decoration-color:color-mix(in srgb,var(--link-peer) 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