:root{--washi: #f3efe4;--washi-2: #f8f5ec;--sumi: #1e1c1a;--sumi-soft:#54504a;--sumi-faint:#8f897d;--rule: #ddd5c4;--rule-2: #c8bfab;--shu: #c2372a;--shu-deep:#9e2a1f;--shu-wash:#efe0dc;--gold: #9a7b3a;--mincho: "Hiragino Mincho ProN", "Yu Mincho", YuMincho, "Noto Serif JP", serif;--gothic: "Hiragino Kaku Gothic ProN", "Yu Gothic", YuGothic, "Noto Sans JP", system-ui, sans-serif;--latin: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;--measure: 42rem}@media(prefers-color-scheme:dark){:root{--washi: #1a1917;--washi-2: #211f1c;--sumi: #ece7db;--sumi-soft:#a8a296;--sumi-faint:#726c60;--rule: #2f2b26;--rule-2: #403a33;--shu: #e2604c;--shu-deep:#ef7963;--shu-wash:#2c211d;--gold: #c39a4f}}:root[data-theme=light]{--washi:#f3efe4;--washi-2:#f8f5ec;--sumi:#1e1c1a;--sumi-soft:#54504a;--sumi-faint:#8f897d;--rule:#ddd5c4;--rule-2:#c8bfab;--shu:#c2372a;--shu-deep:#9e2a1f;--shu-wash:#efe0dc;--gold:#9a7b3a}:root[data-theme=dark]{--washi:#1a1917;--washi-2:#211f1c;--sumi:#ece7db;--sumi-soft:#a8a296;--sumi-faint:#726c60;--rule:#2f2b26;--rule-2:#403a33;--shu:#e2604c;--shu-deep:#ef7963;--shu-wash:#2c211d;--gold:#c39a4f}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}section[id],header[id]{scroll-margin-top:1.2rem}.navbtn{position:fixed;top:1rem;right:1.05rem;z-index:60;width:2.9rem;height:2.9rem;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;background:var(--washi-2);border:1px solid var(--rule-2);border-radius:5px;cursor:pointer;transition:background .2s ease,box-shadow .2s ease;box-shadow:0 2px 10px 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.mi-k{font-family:var(--latin);font-size:.85rem;color:var(--shu);min-width:1.1rem;text-align:center}.menu-sub{list-style:none;margin:.1rem 0 .55rem;padding:0 0 0 1.8rem;display:flex;flex-direction:column;gap:0;border-left:1px solid var(--rule)}.menu-sub a{display:block;text-decoration:none;font-family:var(--mincho);font-size:.93rem;color:var(--sumi-soft);padding:.42rem .5rem;border-radius:3px;transition:background .15s ease,color .15s ease}.menu-sub 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30%,transparent);letter-spacing:0;flex:none}.seal.small{width:3rem;height:3rem;font-size:1.5rem;border-width:2px}header.hero{border-bottom:1px solid var(--rule);padding:clamp(3rem,8vw,6rem) 0 clamp(2.4rem,5vw,3.6rem);position:relative}.hero-top{display:flex;justify-content:flex-start;align-items:center;gap:1rem;padding-right:3.2rem}.hero h1{font-family:var(--mincho);font-weight:600;font-size:clamp(2rem,6vw,3.6rem);line-height:1.32;letter-spacing:.02em;margin:clamp(1.6rem,4vw,2.4rem) 0 0}.hero h1 .shu{color:var(--shu)}.hero-lead{font-size:clamp(1.02rem,2.4vw,1.2rem);color:var(--sumi-soft);line-height:1.95;margin-top:clamp(1.4rem,3.5vw,2rem);max-width:33rem}.byline{margin-top:clamp(1.8rem,4vw,2.6rem);padding-top:1rem;border-top:1px solid var(--rule);display:flex;flex-wrap:wrap;gap:.4rem 1.4rem;font-family:var(--gothic);font-size:.78rem;letter-spacing:.06em;color:var(--sumi-faint)}.byline b{color:var(--sumi);font-weight:600}.term{display:flex;flex-wrap:wrap;align-items:baseline;gap:.55rem 1.1rem;margin-top:clamp(1.5rem,3.5vw,2.1rem);font-family:var(--gothic);font-size:.9rem;letter-spacing:.05em}.term-k{font-weight:700;color:#fff;background:var(--shu);padding:.3rem .75rem;border-radius:2px;font-size:.74rem;letter-spacing:.16em}.term-k.closed{background:var(--sumi-soft)}.term-range{color:var(--sumi-soft)}.term-count{color:var(--sumi)}.term-count b{font-family:var(--latin);font-size:1.35rem;color:var(--shu);font-variant-numeric:tabular-nums;margin:0 .12em}section{padding:clamp(2.8rem,7vw,5rem) 0}section+section{border-top:1px solid var(--rule)}.sec-head{margin-bottom:clamp(1.6rem,4vw,2.4rem)}.sec-head .k{font-family:var(--latin);font-size:.85rem;color:var(--shu);letter-spacing:.14em;display:block;margin-bottom:.6rem}.sec-head h2{font-family:var(--mincho);font-size:clamp(1.5rem,4vw,2.2rem);line-height:1.42;margin:0}.prose>p{margin-bottom:1.25rem;font-size:1.05rem}.prose>p:last-child{margin-bottom:0}em.mk{font-style:normal;font-weight:600;color:var(--sumi);background:linear-gradient(transparent 60%,color-mix(in srgb,var(--shu) 22%,transparent) 60%)}.threads{display:flex;flex-direction:column;gap:1px;background:var(--rule);border-block:1px solid var(--rule);margin-top:clamp(1.6rem,4vw,2.2rem)}.thread{background:var(--washi);padding:clamp(1.4rem,3.4vw,1.9rem) 0;display:grid;grid-template-columns:2.6rem 1fr;gap:0 1.2rem}.thread .no{font-family:var(--latin);font-size:1.5rem;color:var(--shu);line-height:1.1}.thread h3{font-family:var(--mincho);font-size:1.22rem;margin:.1rem 0 .5rem;line-height:1.5;align-self:start}.thread .body{grid-column:2}.thread p{font-size:1rem;color:var(--sumi-soft);line-height:1.85}.sheet{position:relative;background:var(--washi-2);border:1px solid 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8%,transparent);border-radius:2px 2px 0 0;box-decoration-break:clone;-webkit-box-decoration-break:clone}.slot .hint{color:var(--shu);font-weight:600}.submit{margin-top:clamp(1.6rem,4vw,2.2rem);display:flex;flex-direction:column;gap:.75rem;align-items:flex-start}.btn{display:inline-block;font-family:var(--gothic);font-weight:700;font-size:.98rem;color:#fff;background:var(--shu);padding:.8rem 1.4rem;border-radius:3px;text-decoration:none;letter-spacing:.03em;transition:background .2s ease,transform .2s ease;border:none}.btn:hover{background:var(--shu-deep);transform:translateY(-1px)}.btn:focus-visible{outline:2px solid var(--shu-deep);outline-offset:2px}.btn.disabled{background:var(--washi-2);color:var(--sumi-faint);border:1px solid var(--rule-2);cursor:default}.btn.disabled:hover{transform:none;background:var(--washi-2)}.submit-note{font-family:var(--mincho);font-size:.92rem;color:var(--sumi-soft)}.legend{margin-top:clamp(1.8rem,4vw,2.4rem);display:grid;gap:1px;background:var(--rule);border:1px solid var(--rule)}.lg{background:var(--washi);padding:clamp(1.1rem,2.6vw,1.4rem)}.lg .t{font-family:var(--gothic);font-weight:700;font-size:.95rem;color:var(--sumi);display:flex;align-items:baseline;gap:.6rem}.lg .t .b{font-family:var(--latin);color:var(--shu);font-size:.85rem}.lg p{font-size:.92rem;color:var(--sumi-soft);margin-top:.4rem;line-height:1.75}.chips{display:flex;flex-wrap:wrap;gap:.4rem;margin-top:.6rem}.chip{font-family:var(--gothic);font-size:.8rem;color:var(--sumi);border:1px solid var(--rule-2);border-radius:2px;padding:.24rem .6rem;background:var(--washi-2)}.chip.on{color:#fff;background:var(--shu);border-color:var(--shu)}:root[data-theme=dark] .chip.on{color:#1a1917}@media(prefers-color-scheme:dark){:root:not([data-theme=light]) .chip.on{color:#1a1917}}.phases{display:grid;grid-template-columns:repeat(5,1fr);gap:1px;background:var(--rule);border:1px solid var(--rule);margin-top:1rem}.ph{background:var(--washi);padding:.9rem .7rem;text-align:center}.ph .n{font-family:var(--latin);color:var(--shu);font-size:1.15rem}.ph .nm{font-family:var(--gothic);font-size:.76rem;color:var(--sumi);margin-top:.25rem;letter-spacing:.04em}@media(max-width:34rem){.phases{grid-template-columns:repeat(2,1fr)}}.decl{background:var(--shu-wash);border-left:3px solid var(--shu);padding:clamp(1.3rem,3.4vw,1.8rem);border-radius:0 4px 4px 0;margin-top:clamp(1.6rem,4vw,2.2rem)}.decl .t{font-family:var(--gothic);font-weight:700;color:var(--shu-deep);letter-spacing:.08em;font-size:.95rem}.decl p{font-family:var(--mincho);font-size:1.05rem;color:var(--sumi);margin-top:.6rem;line-height:1.85}.decl b{color:var(--shu-deep)}.docs{display:grid;gap:1px;background:var(--rule);border:1px solid var(--rule);margin-top:clamp(1.6rem,4vw,2.2rem)}.doc-card{background:var(--washi);padding:clamp(1.3rem,3.2vw,1.8rem);display:grid;grid-template-columns:1fr auto;gap:.5rem 1rem;align-items:center;text-decoration:none;color:inherit;transition:background .2s ease}.doc-card:hover{background:var(--washi-2)}.doc-card:focus-visible{outline:2px solid var(--shu);outline-offset:-2px}.doc-card .dc-k{font-family:var(--gothic);font-size:.7rem;letter-spacing:.16em;font-weight:700;color:var(--shu);text-transform:uppercase}.doc-card h3{font-family:var(--mincho);font-weight:600;font-size:1.16rem;line-height:1.5;margin:.35rem 0 .3rem;color:var(--sumi)}.doc-card p{font-family:var(--mincho);font-size:.94rem;color:var(--sumi-soft);line-height:1.75}.doc-card .arrow{font-family:var(--latin);font-size:1.5rem;color:var(--shu);grid-row:1 / span 3;align-self:center}.closing{text-align:center;border-top:2px solid var(--shu)}.closing .col{width:min(44rem,92vw)}.closing .q{font-family:var(--mincho);font-size:clamp(1.4rem,3.6vw,2rem);line-height:1.7;margin:clamp(1.6rem,4vw,2.2rem) 0}.closing .q .shu{color:var(--shu)}.closing .sig{margin-top:clamp(2rem,5vw,3rem);display:flex;flex-direction:column;align-items:center;gap:1.1rem}.closing .sig .nm{font-family:var(--gothic);font-size:.82rem;letter-spacing:.14em;color:var(--sumi-faint)}footer{border-top:1px solid var(--rule);padding:clamp(1.8rem,4vw,2.6rem) 0 3.6rem}footer .col{font-family:var(--gothic);font-size:.78rem;color:var(--sumi-faint);line-height:1.85}footer .lbl{color:var(--shu);font-weight:700;letter-spacing:.14em;font-size:.68rem;display:block;margin-bottom:.4rem}.rv{opacity:0;transform:translateY(13px);transition:opacity .7s ease,transform .7s ease}.rv.in{opacity:1;transform:none}@media(prefers-reduced-motion:reduce){.rv{opacity:1;transform:none;transition:none}}@media(max-width:34rem){.thread{grid-template-columns:1fr;gap:.4rem}.thread .body{grid-column:1}.hero-top .seal{width:2.7rem;height:2.7rem;font-size:1.35rem}}