:root{--ink:#f2efea;--paper:#fffdfa;--surface:#f7f4ef;--line:#f0ebe4;--text:#2c2825;--muted:#6b645d;--faint:#756e66;--accent:#6a6180;--accent-text:#5a5273;--accent-tint:#f0eef4;--accent-soft:#d6d1e2;--font-body:"Zen Kaku Gothic New","Hiragino Sans","Noto Sans JP","Yu Gothic",system-ui,sans-serif;--measure:39em;--gutter:clamp(1.25rem,4vw,2.75rem);--radius:20px;--radius-sm:16px}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--ink);color:var(--text);font-family:var(--font-body);line-height:1.9;-webkit-text-size-adjust:100%}a{color:var(--accent-text);text-decoration:none}a:hover{text-decoration:underline}a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.shell{max-width:64rem;margin:0 auto;padding:0 var(--gutter)}.masthead{padding:1rem 0}.masthead__inner{display:flex;flex-wrap:wrap;gap:.75rem 1.5rem;align-items:center;justify-content:space-between}.masthead__name{display:inline-flex;align-items:center;gap:.6rem;font-size:1.1rem;font-weight:700;letter-spacing:.04em;color:var(--text)}.masthead__name:before{content:"";width:12px;height:12px;border-radius:999px;background:var(--accent)}.masthead__nav{display:flex;gap:.25rem;font-size:.85rem;font-weight:500}.masthead__nav a{display:inline-flex;align-items:center;min-height:44px;padding:0 1rem;border-radius:999px;color:var(--muted)}.masthead__nav a:hover{background:var(--surface);text-decoration:none}.masthead__nav a[aria-current=page]{background:var(--accent-tint);color:var(--accent-text)}main{padding:0 0 clamp(2rem,5vw,3.5rem)}.card{background:var(--paper);border-radius:var(--radius);box-shadow:0 2px 10px rgba(44,40,37,.06);padding:clamp(1.75rem,5vw,2.75rem)}.eyebrow{display:inline-block;font-size:.75rem;font-weight:500;letter-spacing:.1em;color:var(--accent-text);background:var(--accent-tint);padding:.35rem .9rem;border-radius:999px;margin:0 0 1.25rem}h1{font-size:clamp(1.55rem,4.2vw,2.4rem);line-height:1.6;margin:0 0 1.1rem}h1,h2{text-wrap:pretty}h2{font-size:clamp(1.2rem,3vw,1.45rem);line-height:1.55;margin:2.4em 0 .9em}.lede{font-size:1rem;line-height:2;color:var(--muted);max-width:32em;margin:0 0 1.75rem;text-wrap:pretty}.actions{display:flex;flex-wrap:wrap;gap:.625rem}.btn{font:inherit;display:inline-flex;align-items:center;justify-content:center;min-height:48px;font-size:.9rem;font-weight:700;padding:0 1.6rem;border:1px solid var(--accent);border-radius:999px;background:var(--accent);color:#ffffff;cursor:pointer}.btn:hover{text-decoration:none;filter:brightness(1.08)}.btn--ghost{background:transparent;color:var(--muted);border-color:#e4ded6;font-weight:500}.index{list-style:none;margin:0;padding:0}.index a{display:grid;grid-template-columns:1fr auto;grid-gap:.25rem 1.5rem;gap:.25rem 1.5rem;align-items:center;padding:1.4rem 1.25rem;border-radius:var(--radius-sm);color:var(--text)}.index a:hover{background:#f8f6fa;text-decoration:none}.index__meta{display:flex;align-items:center;gap:.6rem;font-size:.75rem;color:var(--faint);margin-bottom:.5rem}.index__tag{font-size:.72rem;font-weight:500;color:var(--accent-text);background:var(--accent-tint);padding:.25rem .65rem;border-radius:999px}.index__title{display:block;font-size:1.15rem;font-weight:700;line-height:1.65}.index__desc{display:block;font-size:.85rem;line-height:1.9;color:var(--muted);margin-top:.4rem}.index__go{font-size:.78rem;font-weight:500;color:var(--accent-text);white-space:nowrap}.chips{display:flex;flex-wrap:wrap;gap:.375rem;font-size:.78rem}.chips a{display:inline-flex;align-items:center;min-height:36px;padding:0 .9rem;border:1px solid #eae5dd;border-radius:999px;color:var(--muted)}.chips a[aria-current]{background:var(--accent-tint);border-color:transparent;color:var(--accent-text)}.prose{max-width:var(--measure);font-size:1.03rem;line-height:2.1}.prose p{margin:0 0 1.6em;text-wrap:pretty}.prose h2:before{content:"";display:block;width:32px;height:4px;border-radius:999px;background:var(--accent-soft);margin-bottom:.7rem}.prose h3{font-size:1.05rem;margin:2em 0 .7em}.prose ol,.prose ul{padding-left:1.3rem;margin:0 0 1.6em}.prose li{margin-bottom:.5em}.prose blockquote{margin:0 0 1.8em;padding:1.25rem 1.5rem;background:var(--accent-tint);border-radius:var(--radius-sm);font-size:.97rem;line-height:1.95;color:#4d4842}.prose blockquote p:last-child{margin-bottom:0}.prose table{display:block;width:100%;overflow-x:auto;border-collapse:collapse;font-size:.9rem;margin:0 0 1.8em}.prose td,.prose th{text-align:left;padding:.9rem 1.1rem;border-top:1px solid #f2ede6;line-height:1.85;color:var(--muted);vertical-align:top}.prose th{background:var(--surface);color:var(--text);font-size:.82rem;border-top:0}.prose td:first-child{font-weight:500;color:var(--text)}.article__meta{display:flex;align-items:center;gap:.625rem;margin-bottom:1rem}.article__date{font-size:.75rem;color:var(--faint)}.article__layout{display:grid;grid-template-columns:minmax(0,1fr) 236px;grid-gap:3rem;gap:3rem;align-items:start}.toc{position:-webkit-sticky;position:sticky;top:1.5rem;background:var(--surface);border-radius:var(--radius-sm);padding:1.25rem 1.375rem}.toc__title{font-size:.75rem;font-weight:700;color:var(--accent-text);margin:0 0 .875rem}.toc ol{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.75rem}.toc a{display:block;font-size:.8rem;line-height:1.7;color:var(--muted);border-left:3px solid transparent;padding-left:.75rem}.toc a:hover{color:var(--text);text-decoration:none}.related{border-top:1px solid var(--line);padding-top:1.75rem;margin-top:2.5rem}.related__title{font-size:.8rem;font-weight:700;color:var(--faint);margin:0 0 1rem}.related__grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(15rem,1fr));grid-gap:.875rem;gap:.875rem}.related__item{display:block;background:#f8f6fa;border-radius:var(--radius-sm);padding:1.125rem 1.25rem;color:var(--text)}.related__item:hover{text-decoration:none;filter:brightness(.985)}.related__item span{display:block;font-size:.72rem;color:var(--faint);margin-bottom:.4rem}.related__item strong{display:block;font-size:.94rem;font-weight:700;line-height:1.65}.factgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(14rem,1fr));grid-gap:.875rem;gap:.875rem}.factgrid>div{background:var(--surface);border-radius:var(--radius-sm);padding:1.25rem 1.375rem}.factgrid dt{font-size:.72rem;color:var(--faint);margin-bottom:.5rem}.factgrid dd{margin:0;font-size:.82rem;line-height:1.85;color:var(--muted)}.disclosure{border-radius:var(--radius-sm);padding:.875rem 1.125rem;font-size:.9rem;line-height:1.85;color:#4d4842;margin:0 0 2.25rem}.colophon,.disclosure{background:var(--surface)}.colophon{border-radius:var(--radius) var(--radius) 0 0;margin-top:2rem;padding:1.5rem 0 2rem}.colophon__inner{display:flex;flex-wrap:wrap;gap:1rem 2rem;align-items:flex-end;justify-content:space-between}.colophon nav{display:flex;flex-wrap:wrap;gap:0 1.125rem;font-size:.8rem}.colophon nav a{display:inline-flex;align-items:center;min-height:44px;color:var(--muted)}.colophon p{margin:0;font-size:.78rem;line-height:1.85;color:var(--muted);text-align:right}.colophon,.disclosure,.index__title,.prose{overflow-wrap:anywhere}.prose img{max-width:100%;height:auto}.prose img,.prose pre{border-radius:var(--radius-sm)}.prose pre{overflow-x:auto;background:var(--surface);padding:1rem 1.125rem;font-size:.85rem;line-height:1.7}@media (max-width:60rem){.article__layout{grid-template-columns:minmax(0,1fr);gap:1.75rem}.toc{position:static;order:-1}}@media (max-width:40rem){.masthead__inner{gap:.5rem}.masthead__nav{margin-left:-1rem}.card{border-radius:var(--radius);padding:1.5rem 1.25rem}.index a{grid-template-columns:minmax(0,1fr);padding:1rem .75rem;min-height:44px}.index__go{display:none}.colophon__inner{flex-direction:column;align-items:flex-start}.colophon p{text-align:left}.colophon nav a,.masthead__name,.toc a{min-height:44px;display:inline-flex;align-items:center}.toc a{padding-top:.25rem;padding-bottom:.25rem}}@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}