:root{
  --bg:#e9ebef; --card:#f7f8fa; --ink:#15171c; --sub:#5f656e; --line:#d5d9e0;
  --tonal:#eceef2; --node:#ffffff; --accent:#4f7d12; --accent-soft:#edf5dd;
  --c-blue:#1160c9; --c-coral:#c2562a; --c-red:#d1352b; --warn:#a97f00;
  --shadow:0 1px 2px rgba(16,20,28,.05),0 8px 28px rgba(16,20,28,.06);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0a0b0d; --card:#14161a; --ink:#e7e9ee; --sub:#8d949f; --line:#282c33;
    --tonal:#1d2127; --node:#181b20; --accent:#d8efb4; --accent-soft:#242e1a;
    --c-blue:#5ea8ff; --c-coral:#ff8a4d; --c-red:#ff6a5c; --warn:#e8c25c;
    --shadow:0 1px 0 rgba(255,255,255,.03),0 18px 50px rgba(0,0,0,.5);
  }
}
:root[data-theme="dark"]{
    --bg:#0a0b0d; --card:#14161a; --ink:#e7e9ee; --sub:#8d949f; --line:#282c33;
    --tonal:#1d2127; --node:#181b20; --accent:#d8efb4; --accent-soft:#242e1a;
    --c-blue:#5ea8ff; --c-coral:#ff8a4d; --c-red:#ff6a5c; --warn:#e8c25c;
    --shadow:0 1px 0 rgba(255,255,255,.03),0 18px 50px rgba(0,0,0,.5);
}
*{box-sizing:border-box}
:root{--mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;--ac:var(--accent)}
section.ch,.chapters li{--ac:var(--accent);--ac-soft:color-mix(in srgb,var(--ac) 13%,var(--card))}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scrollbar-gutter:stable}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:"Inter","Noto Sans JP",-apple-system,BlinkMacSystemFont,"Helvetica Neue",
    "Hiragino Sans","Hiragino Kaku Gothic ProN","Yu Gothic UI",Meiryo,sans-serif;
  font-size:16px;line-height:1.75;padding:16px;word-break:auto-phrase;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
.wrap{position:relative;z-index:1;max-width:960px;margin:12px auto 4px}
p{margin:0;text-wrap:pretty}
a{color:inherit}
.nw{white-space:nowrap}
.sp{display:none}
.ic{width:22px;height:22px;flex:none;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.ico{display:flex;flex:none;width:38px;height:38px;border-radius:11px;background:var(--ac-soft);color:var(--ac);align-items:center;justify-content:center}
.hero-bg{position:absolute;top:0;left:0;right:0;height:clamp(220px,33vw,480px);overflow:hidden;pointer-events:none;z-index:0}
.hero-bg img{display:block;width:100%;height:100%;object-fit:cover;object-position:center 50%;opacity:.22;
  -webkit-mask-image:linear-gradient(to bottom,#000 0%,#000 25%,transparent 100%),linear-gradient(to right,transparent 0%,#000 20%,#000 80%,transparent 100%);-webkit-mask-composite:source-in;
  mask-image:linear-gradient(to bottom,#000 0%,#000 25%,transparent 100%),linear-gradient(to right,transparent 0%,#000 20%,#000 80%,transparent 100%);mask-composite:intersect}
:root:not([data-theme="dark"]) .hero-bg img{opacity:.10;filter:saturate(.7)}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]) .hero-bg img{opacity:.22;filter:none}}
:root[data-theme="dark"] .hero-bg img{opacity:.22;filter:none}
header.top{padding:76px 8px 0}
.pages{display:flex;align-items:center;gap:6px;margin:0 0 24px;overflow-x:auto;scrollbar-width:none}
.pages::-webkit-scrollbar{display:none}
.pages a{display:flex;align-items:center;flex:none;padding:6px 14px;border-radius:980px;border:1px solid var(--line);
  color:var(--sub);text-decoration:none;font-size:13px;line-height:1.45;white-space:nowrap;
  transition:color .2s,border-color .2s,background-color .2s}
.pages a:hover{color:var(--ink);border-color:var(--sub)}
.pages a[aria-current="page"]{background:var(--tonal);color:var(--ink);font-weight:500;border-color:transparent}
.pages .home{padding:5px 12px;color:var(--ink);border-color:transparent}
.pages .home:hover{border-color:var(--line)}
.pages .home svg{display:block;width:auto;height:19px;fill:currentColor}
.pages a{height:33px;box-sizing:border-box}
.eyebrow{display:flex;align-items:center;gap:8px;font-size:18px;letter-spacing:.08em;color:var(--sub);font-weight:600;margin:0}
.eyebrow .ic{width:19px;height:19px;color:var(--ac)}
.eyebrow a.eb-home{color:inherit;text-decoration:underline;text-decoration-thickness:1px;text-decoration-color:color-mix(in srgb,currentColor 40%,transparent);text-underline-offset:5px;transition:color .2s,text-decoration-color .2s}
.eyebrow a.eb-home:hover{color:var(--ink);text-decoration-color:currentColor}
.title-row{display:flex;align-items:flex-start;gap:16px;margin-top:12px}
.title-row .chara{width:34px;height:34px;flex:none;margin-top:4px;color:var(--ink)}
h1{font-size:clamp(22px,3vw,32px);line-height:1.4;letter-spacing:-.02em;font-weight:600;margin:0}
.hang{margin-left:-.4em}
.lead{margin-top:16px;font-size:15px;line-height:1.8;color:var(--sub);max-width:44em}
.chapters{list-style:none;margin:34px 0 0;padding:0;display:flex;flex-wrap:wrap;gap:8px}
.chapters a{display:flex;align-items:center;gap:8px;background:var(--card);border-radius:12px;padding:6px 12px 6px 7px;text-decoration:none;box-shadow:var(--shadow);transition:transform .15s}
.chapters a:hover{transform:translateY(-2px)}
.chapters .ico{width:26px;height:26px;border-radius:8px}
.chapters .ico .ic{width:14px;height:14px}
.chapters .tt{display:flex;align-items:baseline;gap:6px}
.chapters .n{font-family:var(--mono);font-size:11px;letter-spacing:.06em;color:var(--sub);font-weight:600;font-variant-numeric:tabular-nums}
.chapters b{font-size:14px;font-weight:600;line-height:1.3}
nav.toc{position:fixed;left:0;right:0;top:0;z-index:5;padding:10px 16px;transform:translateY(-100%);transition:transform .2s;
  background:color-mix(in srgb,var(--bg) 82%,transparent);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}
nav.toc.show{transform:none}
nav.toc ul{position:relative;display:flex;gap:8px;max-width:960px;margin:0 auto;padding:0;list-style:none;overflow-x:auto;scrollbar-width:none}
nav.toc ul::-webkit-scrollbar{display:none}
nav.toc a{display:block;padding:6px 14px;border-radius:980px;background:var(--card);text-decoration:none;font-size:13px;font-weight:500;white-space:nowrap}
nav.toc a .n{font-family:var(--mono);color:var(--sub);font-variant-numeric:tabular-nums;margin-right:.5em}
nav.toc a[aria-current="true"]{background:var(--ink);color:var(--card)}
nav.toc a[aria-current="true"] .n{color:inherit;opacity:.7}
section.ch{background:var(--card);border:1px solid color-mix(in srgb,var(--line) 55%,transparent);border-radius:24px;box-shadow:var(--shadow);padding:46px 40px 40px;margin-top:24px;scroll-margin-top:72px}
.ch-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.ch-head .ico{width:34px;height:34px;border-radius:10px;margin-right:2px}
.ch-head .ic{width:20px;height:20px}
.ch-no{font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--sub);font-weight:600;font-variant-numeric:tabular-nums}
h2{font-size:29px;line-height:1.3;font-weight:600;margin:14px 0 0;letter-spacing:-.015em}
.sub{margin-top:12px;color:var(--sub);font-size:15px;line-height:1.7}
.txt{margin-top:12px;font-size:14px;line-height:1.85}
.fig-title{display:flex;align-items:center;flex-wrap:wrap;gap:4px 8px;margin:30px 0 12px;font-size:13px;font-weight:600}
.fig-title small{font-weight:400;color:var(--sub);font-size:12px}
.fig-note{margin-top:10px;font-size:12px;color:var(--sub);line-height:1.7}
.note{margin-top:8px;font-size:12px;line-height:1.7;color:var(--sub)}
.note::before{content:"※ "}
.point{display:flex;gap:14px;align-items:baseline;margin-top:26px;background:var(--ac-soft);border-radius:16px;padding:16px 20px;font-size:15px;font-weight:500}
.point::before{content:"POINT";flex:none;font-size:10px;letter-spacing:.14em;font-weight:700;color:var(--ac)}
.tag{display:inline-block;padding:1px 8px;border-radius:7px;background:var(--tonal);font-size:11px;font-weight:600;letter-spacing:.04em;color:var(--sub);white-space:nowrap}
.okng{flex:none;width:18px;height:18px;fill:none;stroke-width:2.2;stroke-linecap:round}
.okng-o{stroke:var(--c-blue)}.okng-x{stroke:var(--c-coral)}
.tl{position:relative;margin:24px 0 0;padding:0;list-style:none;display:grid;gap:20px}
.tl::before{content:"";position:absolute;left:13px;top:20px;bottom:20px;border-left:1.5px solid color-mix(in srgb,var(--sub) 45%,transparent)}
.tl>li{position:relative;margin-left:42px;background:var(--node);border:1px solid var(--line);border-radius:16px}
.tl>li.key{border-color:var(--ac)}
.tl>li:not(:last-child)::after{content:"";position:absolute;left:-34.75px;top:calc(100% + 5px);border-top:9px solid var(--sub);border-left:5.5px solid transparent;border-right:5.5px solid transparent}
.tl .n{position:absolute;left:-42px;top:50%;transform:translateY(-50%);display:flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:50%;background:var(--ink);color:var(--card);font-size:13px;font-weight:700}
.tl>li.key .n{background:var(--ac)}
.tl.rows>li{display:grid;grid-template-columns:28px 13.5em minmax(0,1fr);gap:6px 18px;align-items:center;padding:14px 20px 14px 0}
.tl.rows>li.key{background:var(--ac-soft)}
.tl-h{grid-column:1 / 3;display:flex;align-items:center;gap:10px;padding-left:20px}
.tl-h .ic{width:20px;height:20px;color:var(--sub)}
.tl>li.key .tl-h .ic{color:var(--ac)}
.tl-h b{font-size:16px;font-weight:600;line-height:1.4}
.tl>li.key .tl-h b{color:var(--ac)}
.tl>li.key .tl-h .tag{background:var(--ac);color:var(--card)}
.tl-b{grid-column:3}
.tl-h.full{grid-column:1 / -1}
.tl-b p{font-size:14px;font-weight:500;line-height:1.65}
.tl-b p.s{margin-top:2px;font-size:13px;font-weight:400;color:var(--sub)}
.tl-b p.s::before{content:"・"}
.tl-b p.nt{margin-top:4px;font-size:12px;font-weight:400;line-height:1.7;color:var(--sub)}
.tl-b p.nt::before{content:"※ "}
.ar{position:relative}
.ar::before{content:"";position:absolute;left:5px;right:9px;top:50%;border-top:1.5px solid var(--sub)}
.ar::after{content:"";position:absolute;right:4px;top:50%;transform:translateY(-4.5px);border-left:7px solid var(--sub);border-top:4.5px solid transparent;border-bottom:4.5px solid transparent}
.hrs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
.hrs div{background:var(--node);border:1px solid var(--line);border-radius:14px;padding:16px 12px 14px;text-align:center}
.hrs small{display:block;font-size:12px;font-weight:700;letter-spacing:.2em;color:var(--ac)}
.hrs b{display:block;margin-top:2px;font-size:24px;font-weight:700;letter-spacing:.06em}
.caution{display:flex;align-items:flex-start;gap:10px;margin-top:12px;font-size:13px;line-height:1.7;color:var(--sub)}
.caution .ic{width:18px;height:18px;margin-top:2px;color:var(--warn)}
.cyc{display:grid;grid-template-columns:minmax(0,1fr) 26px minmax(0,1fr) 26px minmax(0,1fr);margin-top:24px}
.cy{display:flex;flex-direction:column;background:var(--node);border:1px solid var(--line);border-radius:16px;padding:16px 18px 18px}
.cy.key{border-color:var(--ac);background:var(--ac-soft)}
.cy-h{display:flex;align-items:center;gap:10px}
.cy-h .ic{width:24px;height:24px;color:var(--sub);stroke-width:1.5}
.cy.key .cy-h .ic{color:var(--ac)}
.cy-h b{font-size:16px;font-weight:600;line-height:1.45}
.cy.key .cy-h b{color:var(--ac)}
.cy p{margin-top:10px;font-size:13px;line-height:1.75;color:var(--sub)}
.cy.key p{color:var(--ink)}
.back{position:relative;height:22px;margin:4px calc(100% / 6) 0}
.back::before{content:"";position:absolute;left:0;right:0;top:0;height:18px;border:1.5px solid var(--sub);border-top:0;border-radius:0 0 12px 12px}
.back::after{content:"";position:absolute;left:-4.5px;top:-6px;border-bottom:8px solid var(--sub);border-left:5.25px solid transparent;border-right:5.25px solid transparent}
.back-t{margin-top:6px;text-align:center;font-size:13px;font-weight:600;color:var(--sub)}
.two{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:24px}
.wk{background:var(--node);border:1px solid var(--line);border-radius:16px;padding:16px 18px 18px}
.wk.ok{border-color:var(--c-blue)}
.wk-h{display:flex;align-items:center;gap:8px;font-size:12px;font-weight:700;letter-spacing:.06em;color:var(--sub)}
.wk q{display:block;margin-top:10px;font-size:16px;font-weight:600;line-height:1.6;quotes:none}
.wk p{margin-top:8px;font-size:14px;line-height:1.7}
.wk.ng p{color:var(--c-coral)}
.wk.ok p{color:var(--c-blue)}
.chips{display:flex;flex-wrap:wrap;gap:6px;margin:14px 0 0;padding:0;list-style:none}
.chips li{background:var(--tonal);border-radius:8px;padding:3px 10px;font-size:13px;line-height:1.6}
.chips li.etc{background:none;padding-left:2px;color:var(--sub)}
.grow{display:grid;grid-template-columns:minmax(0,1fr) 26px minmax(0,1fr);margin-top:22px}
.gw{background:var(--tonal);border-radius:16px;padding:14px 18px 16px}
.gw.me{background:var(--ac-soft)}
.gw-k{font-size:12px;font-weight:700;letter-spacing:.06em;color:var(--sub)}
.gw.me .gw-k{color:var(--ac)}
.gw p{margin-top:6px;font-size:14px;font-weight:500;line-height:1.7}
.todo{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 28px;margin:16px 0 0;padding:0;list-style:none}
.todo li{display:flex;align-items:baseline;gap:12px;padding:9px 2px;border-bottom:1px solid var(--line);font-size:14px;color:var(--sub)}
.todo .n{flex:none;font-family:var(--mono);font-size:11px;letter-spacing:.08em;font-weight:600}
.todo .tag{margin-left:auto}
.hl{margin-top:12px;padding:10px 13px 11px;border-radius:10px;background:var(--ac-soft);font-size:13px;font-weight:600;line-height:1.7}
.hl::before{content:"ここが大事";display:block;margin-bottom:2px;font-size:10px;letter-spacing:.14em;font-weight:700;color:var(--ac)}
.h3{margin:30px 0 0;font-size:18px;font-weight:600;line-height:1.5}
.h3+.txt{margin-top:6px}
.kf{margin-top:4px;background:var(--node);border:1px solid var(--line);border-radius:16px;padding:16px 18px 14px;display:grid;gap:12px}
.kf-row{display:grid;grid-template-columns:132px minmax(0,1fr) 148px;gap:14px;align-items:center}
.kf-k{font-size:13px;font-weight:600}
.kf-row.me .kf-k{color:var(--ac)}
.kf-cells{display:grid;grid-template-columns:repeat(13,minmax(0,1fr));gap:4px}
.kf-cells i{height:24px;border-radius:5px;display:flex;align-items:center;justify-content:center}
.kf-cells .draw{background:color-mix(in srgb,var(--sub) 42%,var(--node))}
.kf-cells .auto{border:1px dashed color-mix(in srgb,var(--sub) 60%,transparent)}
.kf-cells .key::before{content:"";width:12px;height:12px;border-radius:2px;background:var(--ac);transform:rotate(45deg)}
.kf-d{font-size:12px;line-height:1.55;color:var(--sub)}
.kf-lg{display:flex;flex-wrap:wrap;gap:6px 18px;padding-top:10px;border-top:1px solid var(--line);font-size:11px;color:var(--sub)}
.kf-lg span{display:inline-flex;align-items:center;gap:6px}
.kf-lg .k::before{content:"";width:9px;height:9px;border-radius:2px;background:var(--ac);transform:rotate(45deg)}
.kf-lg .a::before{content:"";width:12px;height:12px;border-radius:3px;border:1px dashed var(--sub)}
.kf-lg .d::before{content:"";width:12px;height:12px;border-radius:3px;background:color-mix(in srgb,var(--sub) 42%,var(--node))}
.h3 small{margin-left:12px;font-size:13px;font-weight:400;color:var(--sub)}
.fps{display:grid;gap:12px;margin-top:16px}
.fp{display:grid;grid-template-columns:200px minmax(0,1fr);gap:8px 28px;align-items:center;background:var(--node);border:1px solid var(--line);border-radius:16px;padding:16px 22px}
.fp-k{font-size:12px;font-weight:700;letter-spacing:.06em;color:var(--sub)}
.fp-n{margin-top:2px;font-family:var(--mono);font-size:30px;font-weight:700;line-height:1.2;color:var(--ac);font-variant-numeric:tabular-nums}
.fp-n small{margin:0 4px 0 0;font-family:"Inter","Noto Sans JP",sans-serif;font-size:12px;font-weight:600;color:var(--sub)}
.fp-n small:last-child{margin:0 0 0 4px;font-family:var(--mono);font-size:15px;color:var(--ac)}
.fp-u{margin-top:4px;font-size:12px;line-height:1.6;color:var(--sub)}
.fp-r p{font-size:14px;line-height:1.8}
.fp-r p:first-child{font-weight:600}
.tl.cards>li{display:grid;grid-template-columns:minmax(0,300px) minmax(0,1fr);grid-template-areas:"h r" "l r";gap:4px 28px;align-items:start;padding:18px 22px}
.tl.cards .n{top:17px;transform:none}
.stg-h{grid-area:h}
.stg-l{grid-area:l}
.stg-r{grid-area:r}
.stg-h b{display:block;font-size:16px;font-weight:600;line-height:1.4}
.tl.cards>li.key .stg-h b{color:var(--ac)}
.stg-h small{display:block;font-size:12px;font-weight:500;color:var(--sub)}
.stg-what{margin-top:10px;font-size:13px;font-weight:600}
.do{margin:8px 0 0;padding:0;list-style:none;font-size:13px;line-height:1.6}
.do li{position:relative;padding:3px 0 3px 14px}
.do li::before{content:"";position:absolute;left:1px;top:11px;width:5px;height:5px;border-radius:50%;background:var(--sub)}
.stg-r .hl{margin-top:0}
.tl-loop{position:relative;padding-right:46px}
.tl-loop::before{content:"";position:absolute;right:16px;top:40px;bottom:40px;width:18px;border:1.5px solid var(--sub);border-left:0;border-radius:0 12px 12px 0}
.tl-loop::after{content:"";position:absolute;right:34px;top:35.25px;border-right:9px solid var(--sub);border-top:5.5px solid transparent;border-bottom:5.5px solid transparent}
.tl-in{position:absolute;right:-30.25px;top:50%;width:26.25px;border-top:1.5px solid var(--sub)}
.tl-in::before{content:"";position:absolute;left:0;top:-6.25px;border-right:9px solid var(--sub);border-top:5.5px solid transparent;border-bottom:5.5px solid transparent}
.tl-loop-t{position:absolute;right:0;top:50%;transform:translateY(-50%);writing-mode:vertical-rl;font-size:11px;font-weight:600;letter-spacing:.12em;color:var(--sub)}
.back-t.loop{margin-top:12px;text-align:left}
.back-t.loop::before{content:"↺ "}
.lead-why{margin-top:6px}
.badge{position:absolute;top:-11px;right:14px;padding:2px 10px;border-radius:980px;background:var(--ac);color:var(--card);font-size:11px;font-weight:700;letter-spacing:.02em}
.mistakes{display:grid;gap:14px;margin-top:16px}
.mis{background:var(--node);border:1px solid var(--line);border-radius:16px;padding:18px 22px}
.mis-h{display:flex;align-items:flex-start;justify-content:space-between;gap:8px 16px;flex-wrap:wrap}
.mis-h b{font-size:16px;font-weight:600;line-height:1.5}
.sev{display:flex;align-items:center;gap:4px;flex:none;margin-top:5px}
.sev-k{margin-right:4px;font-size:11px;letter-spacing:.06em;color:var(--sub)}
.sev i{width:10px;height:10px;border-radius:50%;border:1.5px solid color-mix(in srgb,var(--sub) 70%,transparent)}
.sev i.on{background:var(--c-red);border-color:var(--c-red)}
.mis-b{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:14px 28px;margin-top:12px}
.lb{display:flex;align-items:center;gap:6px;font-size:11px;font-weight:700;letter-spacing:.1em;color:var(--sub)}
.lb .ic{width:16px;height:16px;stroke-width:1.8}
.lb.sy .ic{color:var(--c-red)}
.lb.fx .ic{color:var(--ac)}
.sym{display:flex;flex-wrap:wrap;gap:6px;margin:8px 0 0;padding:0;list-style:none}
.sym li{background:var(--tonal);border-radius:8px;padding:3px 10px;font-size:13px;line-height:1.6}
.why{margin-top:12px;font-size:13px;line-height:1.8}
.fix{margin:8px 0 0;padding:0;list-style:none;font-size:13px;line-height:1.6}
.fix li{position:relative;padding:4px 0 4px 22px}
.fix li::before{content:"";position:absolute;left:3px;top:9px;width:10px;height:5px;border-left:2px solid var(--ac);border-bottom:2px solid var(--ac);transform:rotate(-45deg)}
.def{margin-top:22px;background:var(--node);border:1px solid var(--line);border-radius:16px;padding:16px 20px 18px}
.def-t{font-size:14px;line-height:1.85}
.do.bk{margin-top:10px;font-size:14px}
.must{margin-top:16px;padding:12px 18px 14px;border-left:3px solid var(--c-red);background:var(--node);border-radius:0 12px 12px 0}
.must-k{font-size:13px;color:var(--sub)}
.must-t{margin-top:2px;font-size:18px;font-weight:700;line-height:1.6}
.kv{margin:12px 0 0;padding:0;list-style:none;display:grid;gap:6px}
.kv li{display:grid;grid-template-columns:4.2em minmax(0,1fr);font-size:13px;line-height:1.7}
.kv b{font-weight:700;color:var(--ac)}
.kv b::after{content:"："}
.kv.wide li{grid-template-columns:7.8em minmax(0,1fr);font-size:14px}
.kv.w9 li{grid-template-columns:8.8em minmax(0,1fr)}
.kv.w11 li{grid-template-columns:10.6em minmax(0,1fr)}
.def .lb+.def-t{margin-top:6px}
.tl-h code{font-size:14px}
.wk p.wk-t{margin-top:10px;font-size:13px;line-height:1.75;color:var(--ink)}
.ih{display:flex;align-items:center;gap:8px}
.ih .ic{width:20px;height:20px}
.ih.ng .ic{color:var(--c-red)}
.f3-k{display:flex;align-items:center;gap:6px}
.f3-k .ic{width:17px;height:17px;stroke-width:1.8;color:var(--sub)}
.f3.good .f3-k .ic{color:var(--ac)}
.chain{display:flex;flex-wrap:wrap;align-items:center;gap:8px 0;margin:0;padding:0;list-style:none}
.chain li{display:flex;align-items:center;font-size:13px;font-weight:500}
.chain li span{background:var(--tonal);border-radius:9px;padding:5px 12px}
.chain li+li::before{content:"→";margin:0 8px;color:var(--sub);font-weight:400}
.chain.v{display:grid;gap:6px;justify-items:start;margin-top:6px}
.chain.v li+li::before{margin:0 8px 0 2px}
.pair2{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:12px;margin-top:22px}
.f3{background:var(--tonal);border-radius:16px;padding:14px 16px 16px}
.f3.good{background:var(--ac-soft)}
.f3-k{margin-bottom:8px;font-size:13px;font-weight:700}
.f3.good .f3-k{color:var(--ac)}
.f3 ul{margin:0;padding:0;list-style:none;font-size:13px;line-height:1.6}
.f3 ul li{position:relative;padding:3px 0 3px 13px}
.f3 ul li::before{content:"";position:absolute;left:0;top:11px;width:5px;height:5px;border-radius:50%;background:var(--sub)}
.f3-sum{margin-top:10px;font-size:13px;font-weight:600;line-height:1.6}
code{font-family:var(--mono);font-size:.92em;background:var(--tonal);border-radius:5px;padding:1px 5px}
.s{font-size:12px;color:var(--sub)}
.exc{display:inline-block;margin:6px 6px 0 0;padding:0 7px;border-radius:6px;background:var(--ac-soft);color:var(--ac);font-size:11px;font-weight:700;letter-spacing:.06em}
.s a,.txt a,.rtable a{color:var(--ac)}
.reasons{display:grid;gap:10px;margin-top:0}
.reasons>div{display:grid;grid-template-columns:15.5em minmax(0,1fr);gap:4px 20px;align-items:start;background:var(--node);border:1px solid var(--line);border-radius:14px;padding:14px 20px}
.rs-h{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:600;line-height:1.5}
.rs-h .ic{width:20px;height:20px;color:var(--ac)}
.rs-t{font-size:13px;line-height:1.75;color:var(--sub)}
.names-ex{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}
.names-ex code{font-size:13px;padding:3px 8px}
.wk .names-ex+p{margin-top:10px;font-size:13px}
.f3-t{font-size:13px;line-height:1.75}
.pair2.one{grid-template-columns:1fr}
.map{margin:10px 0 0;padding:0;list-style:none;display:grid;gap:4px;font-size:13px}
.map li{display:flex;align-items:center;gap:8px}
.map li span{min-width:6em;font-weight:600}
.map li span::after{content:" →";color:var(--sub);font-weight:400}
.shot{display:grid;grid-template-columns:auto minmax(0,1fr);gap:16px 24px;align-items:center;margin:18px 0 0;background:var(--node);border:1px solid var(--line);border-radius:16px;padding:16px 20px}
.shot img{display:block;max-width:100%;max-height:420px;height:auto;border-radius:8px;border:1px solid var(--line)}
.shot figcaption{display:flex;flex-direction:column;gap:6px;font-size:13px;line-height:1.75}
.shot figcaption b{font-size:15px;font-weight:600}
.shot figcaption small{font-size:11px;color:var(--sub)}
.ui{margin:8px 0 2px}
.ui img{display:block;max-width:100%;height:auto;border-radius:6px;border:1px solid var(--line)}
.ui figcaption{margin-top:4px;font-size:11px;line-height:1.6;color:var(--sub)}
.ui img,.shot img{box-sizing:content-box;max-width:calc(100% - 2px)}
.ui.bare img{border:0;border-radius:0}
.ui.bare img{max-width:100%}
.subsec .ui{margin-top:12px}
.figs2{display:flex;flex-wrap:wrap;gap:4px 20px;align-items:flex-start}
.subsec{margin-top:28px;padding-left:18px;border-left:2px solid var(--line);scroll-margin-top:72px}
.sub-h{font-size:15px;font-weight:700;line-height:1.5}
.sub-h+.txt{margin-top:4px}
.sub-h.ih .ic{width:17px;height:17px}
.item .fig-title{margin:10px 0 2px}
.ngl li{padding-left:16px}
.ngl li::before{content:"×";background:none;width:auto;height:auto;top:2px;left:0;border-radius:0;font-weight:700;font-size:13px;line-height:1.6;color:var(--c-coral)}
.item-sum{margin-top:10px;padding-top:9px;border-top:1px dashed var(--line);font-size:13px;font-weight:600;line-height:1.65}
.item-sum::before{content:"→ ";color:var(--ac)}
.item-box{margin-top:10px;background:var(--tonal);border-radius:12px;padding:10px 14px 12px}
.item-box-k{font-size:12px;font-weight:700;letter-spacing:.04em;color:var(--sub);margin-bottom:2px}
.item .item-box>ul,.item .item-box .chips{margin-top:0}
.item-box>ul{margin-top:0}
.item-box .chips li{background:var(--node)}
.item-box+.item-sum{margin-top:12px}
.flowc{display:flex;flex-wrap:wrap;align-items:center;gap:4px 0}
.flowc i{font-style:normal;background:var(--tonal);border-radius:8px;padding:1px 9px;font-size:13px;line-height:1.6}
.flowc i+i{margin-left:22px;position:relative}
.flowc i+i::before{content:"→";position:absolute;left:-17px;color:var(--sub)}
.cam-vid{display:block;width:100%;max-width:420px;height:auto;margin-top:10px;border-radius:10px;background:#16181c}
.cam-fig{margin:16px 0 0;max-width:420px}
.cam-fig figcaption{margin-top:6px;font-size:12px;line-height:1.7;color:var(--sub)}
.cam-img{display:block;width:100%;height:auto;margin-top:10px;border-radius:10px}
.cam-fig.wide{max-width:640px}
.cam-fig .cam-img{margin-top:0}
.ui-img{display:block;max-width:100%;height:auto;margin-top:10px;border-radius:6px}
.cam-fig .ui-img{margin-top:0}
.flowc .fl-br{display:none}
.flowc .fl-br+i{margin-left:22px;position:relative}
.flowc .fl-br+i::before{content:"→";position:absolute;left:-17px;color:var(--sub)}
.item .kv li{font-size:13px}
.item .note{margin-top:6px}
.subsec .tl{margin-top:14px}
.tans{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px 14px;margin-top:20px}
.tan{position:relative;margin:0;background:var(--node);border:1px solid var(--line);border-radius:14px;padding:10px 10px 12px}
.tan img{display:block;width:100%;height:auto;border-radius:6px}
.tan figcaption{margin-top:8px;font-size:12px;line-height:1.7}
.tan figcaption b{display:block;font-size:14px;font-weight:700;margin-bottom:2px}
.tans.two{grid-template-columns:repeat(2,minmax(0,1fr))}
.tan figcaption b .sn{margin-right:4px;vertical-align:1px}
.badge.mu{background:var(--sub)}
.tbl{margin-top:12px;background:var(--node);border:1px solid var(--line);border-radius:16px;overflow:hidden}
.rtable{width:100%;border-collapse:collapse;font-size:13px;line-height:1.7}
.rtable th{text-align:left;padding:10px 16px;font-size:11px;font-weight:700;letter-spacing:.08em;color:var(--sub);border-bottom:1px solid var(--line);background:color-mix(in srgb,var(--tonal) 60%,var(--node))}
.rtable td{padding:11px 16px;vertical-align:top;border-bottom:1px solid var(--line)}
.rtable tr:last-child td{border-bottom:0}
.rtable td:first-child{font-weight:600;width:11em}
.rtable.k6 td:first-child{width:6em}
.rtable.k6 th:first-child{white-space:nowrap}
.subsec .tbl{margin-top:14px}
.t-maya td:first-child{width:8.5em}
.t-maya td:nth-child(2),.t-pb td:nth-child(2){width:auto;white-space:nowrap}
.t-sub td:nth-child(2){width:16em}
.lnav{display:grid;grid-template-columns:1fr 1fr;gap:12px;align-items:stretch;margin-top:24px}
.lnav a{display:flex;flex-direction:column;justify-content:center;gap:2px;background:var(--card);border:1px solid color-mix(in srgb,var(--line) 55%,transparent);border-radius:16px;box-shadow:var(--shadow);padding:14px 18px;text-decoration:none;transition:border-color .15s}
.lnav a:hover{border-color:var(--ac)}
.lnav small{font-size:11px;letter-spacing:.08em;color:var(--sub)}
.lnav b{font-size:15px;font-weight:600;line-height:1.45}
.lnav .next{grid-column:2;text-align:right}
.lnav .prev{grid-column:1}
.lnav .list{grid-column:1 / -1;justify-self:center;background:none;border:0;box-shadow:none;padding:4px 12px;font-size:13px;font-weight:500;color:var(--sub);text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--line)}
.lnav .list:hover{color:var(--ink)}
.todo a{color:var(--ink);text-decoration:none;font-weight:500}
.todo a:hover{color:var(--ac)}
.by{margin:30px 8px 0;padding-top:8px;border-top:1px solid color-mix(in srgb,var(--line) 60%,transparent);color:var(--sub);text-align:right}
.by p{margin:0}
.by .who{font-size:13px;font-weight:600;letter-spacing:.04em;color:var(--ink)}
.by .bio{margin-top:2px;font-size:12px;line-height:1.6}
.by .bio:first-of-type{margin-top:6px}
.by .site{margin-top:6px;font-family:var(--mono);font-size:12px;letter-spacing:.06em}
.by a{color:inherit;text-decoration:none;border-bottom:1px solid var(--line)}
.by a:hover{color:var(--ink);border-color:var(--sub)}
.h3.step{display:flex;align-items:flex-start;gap:10px}
.sn{flex:none;display:inline-flex;align-items:center;justify-content:center;min-width:26px;height:26px;margin-top:1px;padding:0 7px;border-radius:13px;background:var(--ink);color:var(--card);font-family:var(--mono);font-size:12px;font-weight:700;line-height:1;font-variant-numeric:tabular-nums}
.ih.ac .ic{color:var(--ac)}
.ih.mu .ic{color:var(--sub)}
.meta{margin:12px 0 0;display:grid;gap:6px;font-size:13px;line-height:1.6}
.meta>div{display:grid;grid-template-columns:6.5em minmax(0,1fr);gap:12px;align-items:baseline}
.meta dt{font-size:11px;font-weight:700;letter-spacing:.08em;color:var(--sub)}
.meta dd{margin:0}
.meta code,.files code{overflow-wrap:anywhere}
.task{margin-top:22px;background:var(--node);border:1px solid var(--ac);border-radius:16px;padding:16px 20px 18px}
.task-k,.task-sk{display:flex;align-items:center;gap:6px;font-size:11px;font-weight:700;letter-spacing:.12em}
.task-k{color:var(--ac)}
.task-sk{color:var(--sub)}
.task-k .ic,.task-sk .ic{width:16px;height:16px;stroke-width:1.8}
.task-sk.ng .ic{color:var(--c-red)}
.task-t{margin-top:4px;font-size:16px;font-weight:600;line-height:1.6}
.task .meta,.task .txt{margin-top:10px}
.task-sub{margin-top:14px;padding-top:12px;border-top:1px solid var(--line)}
.files{margin:8px 0 0;padding:0;list-style:none;display:grid;gap:4px;font-size:13px;line-height:1.6}
.files li{display:flex;flex-wrap:wrap;align-items:baseline;gap:2px 10px}
.files li span{font-size:12px;color:var(--sub)}
.sev.lv i.on{background:var(--ac);border-color:var(--ac)}
.prx{list-style:none;margin:20px 0 0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}
.prx a{display:flex;align-items:center;gap:8px;height:100%;padding:8px 12px;border:1px solid var(--line);border-radius:12px;background:var(--node);font-size:13px;font-weight:600;line-height:1.45;text-decoration:none;color:var(--ink)}
.prx a:hover{border-color:var(--ink)}
.prx .sn{margin-top:0}
.pr{margin-top:18px;background:var(--node);border:1px solid var(--line);border-radius:18px;padding:22px 26px 24px;scroll-margin-top:72px}
.pr>.h3.step:first-child{margin-top:0}
.pr .item{background:var(--card)}
.pr-fig{margin:14px 0 4px}
.pr-rel{margin-top:14px;font-size:12px;color:var(--sub)}
.pr-rel a.zl:first-of-type{margin-left:8px}
.vid{margin:22px 0 0;max-width:640px}
.vid iframe{display:block;width:100%;aspect-ratio:16/9;height:auto;border:0;border-radius:12px;background:#000}
.vid figcaption{margin-top:6px;font-size:11px;color:var(--sub)}
.pr-fig img{display:block;box-sizing:content-box;max-width:calc(100% - 2px);height:auto;border:1px solid var(--line);border-radius:10px}
.items{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:16px}
.items.one{grid-template-columns:1fr}
.items.three{grid-template-columns:repeat(3,minmax(0,1fr))}
.item .chips{margin-top:8px}
.item{background:var(--node);border:1px solid var(--line);border-radius:16px;padding:14px 18px 16px}
.item-h{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:600;line-height:1.5}
.item-h .ic{width:18px;height:18px;color:var(--ac)}
.item-t{margin-top:6px;font-size:13px;line-height:1.75}
.item .do,.item .note{margin-top:6px}
pre.code{margin:12px 0 0;padding:12px 16px;background:var(--node);border:1px solid var(--line);border-radius:12px;font-family:var(--mono);font-size:12.5px;line-height:1.75;overflow-x:auto;white-space:pre}
.refs{margin-top:28px;background:var(--card);border:1px solid color-mix(in srgb,var(--line) 55%,transparent);border-radius:18px;padding:14px 18px 16px;box-shadow:var(--shadow)}
.refs-k{display:flex;align-items:center;gap:6px;font-size:11px;font-weight:700;letter-spacing:.12em;color:var(--sub)}
.refs-k .ic{width:16px;height:16px;stroke-width:1.8;color:var(--ac)}
.refs ul{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0 0;padding:0;list-style:none}
.refs a{display:flex;align-items:baseline;gap:8px;background:var(--node);border:1px solid var(--line);border-radius:10px;padding:6px 12px;text-decoration:none;font-size:13px;font-weight:600;line-height:1.5;transition:border-color .15s}
.refs a:hover{border-color:var(--ac)}
.refs a small{font-family:var(--mono);font-size:10.5px;font-weight:600;letter-spacing:.06em;color:var(--sub)}
a.zl{display:inline-flex;align-items:baseline;gap:5px;margin-left:6px;padding:0 8px;border-radius:7px;background:var(--ac-soft);color:var(--ac);font-size:11.5px;font-weight:600;line-height:1.7;text-decoration:none;white-space:nowrap}
a.zl::before{content:"座学";font-size:10px;letter-spacing:.08em;opacity:.75}
a.zl:hover{text-decoration:underline}
a.zl .zn{font-size:10px;letter-spacing:.08em;opacity:.75}
a.zl:has(.zn)::before{content:none}  
[id]:not(section):not(svg *):not(symbol){scroll-margin-top:84px}
.todo-k{display:flex;align-items:center;gap:8px;margin:26px 0 0;font-size:13px;font-weight:700;letter-spacing:.06em}
.todo-k small{font-weight:400;color:var(--sub);font-size:12px;letter-spacing:0}
.todo2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 36px}
.todo2 .todo{grid-template-columns:1fr}
@media (max-width:720px){
  body{padding:0;background:var(--card)}
  .wrap{margin:0 0 40px}
  .kv li:has(.flowc){grid-template-columns:1fr;gap:3px}
  .flowc .fl-br{display:block;flex-basis:100%;height:0}
  .sp{display:inline}
  br.pc{display:none}
  header.top{padding:48px 20px 32px;border-bottom:1px solid var(--line)}
  .pages{margin:0 0 20px}
  .eyebrow{font-size:16px}
  .title-row .chara{width:28px;height:28px;margin-top:3px}
  h1{font-size:24px}
  .lead{font-size:14px;margin-top:14px}
  .chapters{gap:6px;margin-top:26px}
  .chapters a{background:var(--tonal);box-shadow:none;padding:5px 10px 5px 6px}
  nav.toc{padding:8px 20px;background:color-mix(in srgb,var(--card) 85%,transparent);border-bottom:1px solid var(--line)}
  nav.toc a{background:var(--tonal)}
  section.ch{border-radius:0;box-shadow:none;border:0;border-bottom:1px solid var(--line);padding:38px 20px 32px;margin-top:0}
  h2{font-size:23px}
  .point{flex-direction:column;gap:4px;padding:14px 18px}
  .cyc,.grow{grid-template-columns:1fr}
  .ar,.cyc>.ar,.grow>.ar{height:28px}
  .ar::before{left:50%;right:auto;top:5px;bottom:10px;border-top:0;border-left:1.5px solid var(--sub)}
  .ar::after{right:auto;left:50%;top:auto;bottom:3px;transform:translateX(-4.5px);border-left:4.5px solid transparent;border-right:4.5px solid transparent;border-top:7px solid var(--sub);border-bottom:0}
  .tl>li{margin-left:38px}
  .tl>li:not(:last-child)::after{left:-30.75px}
  .tl .n{left:-38px;top:14px;transform:none}
  .tl.rows>li{grid-template-columns:minmax(0,1fr);padding:12px 16px}
  .tl.cards>li{grid-template-columns:1fr;grid-template-areas:"h" "l" "r";padding:14px 16px 16px}
  .tl-loop{padding-right:0}
  .tl-loop::before,.tl-loop::after,.tl-loop-t,.tl-in{display:none}
  .tl-h{grid-column:1;padding-left:0;flex-wrap:wrap}
  .tl-b{grid-column:1}
  .hrs{gap:6px}
  .hrs div{padding:12px 6px}
  .hrs b{font-size:20px}
  .back{display:none}
  .back-t{margin-top:12px;text-align:left}
  .back-t::before{content:"↺ "}
  .two{grid-template-columns:1fr}
  .todo{grid-template-columns:1fr}
  .todo2{grid-template-columns:1fr}
  .tans,.tans.two{grid-template-columns:1fr;gap:20px}
  .prx{grid-template-columns:repeat(2,minmax(0,1fr))}
  .prx a{gap:6px;padding:7px 8px;font-size:11px;letter-spacing:-.01em}
  .prx .sn{min-width:22px;height:22px;padding:0 5px;font-size:11px}
  .pr{padding:18px 16px 20px}
  .subsec{padding-left:12px}
  .kf{padding:14px}
  .kf-row{grid-template-columns:1fr;gap:6px}
  .kf-d br{display:none}
  .fp{grid-template-columns:1fr;padding:14px 16px 16px}
  .h3 small{display:block;margin:2px 0 0}
  .ih{flex-wrap:nowrap}
  .ih:has(small){flex-wrap:wrap;row-gap:0}
  .ih small{flex-basis:100%;margin:0 0 0 28px}
  .stg-r{margin-top:6px}
  .mis{padding:14px 16px 16px}
  .mis-b{grid-template-columns:1fr}
  .def{padding:14px 16px 16px}
  .pair2{grid-template-columns:1fr}
  .reasons>div{grid-template-columns:1fr}
  .shot{grid-template-columns:1fr;padding:14px}
  .shot img{max-height:none;margin:0 auto}
  .rtable thead{display:none}
  .rtable,.rtable tbody,.rtable tr,.rtable td{display:block;width:auto !important}
  .rtable tr{padding:12px 16px;border-bottom:1px solid var(--line)}
  .rtable tr:last-child{border-bottom:0}
  .rtable td{padding:2px 0;border:0;white-space:normal !important}
  .rtable td:not(:first-child)::before{content:attr(data-k);display:block;margin-top:6px;font-size:10px;font-weight:700;letter-spacing:.1em;color:var(--sub)}
  .task{padding:14px 16px 16px}
  .meta>div{grid-template-columns:1fr;gap:0}
  .items,.items.three{grid-template-columns:1fr}
  .item{padding:14px 16px 16px}
  pre.code{padding:10px 12px;font-size:12px}
  .refs{margin:0;border-radius:0;border-width:0 0 1px;box-shadow:none;padding:16px 20px}
  .lnav{margin:20px 20px 0;gap:10px}
  .lnav a{padding:12px 14px}
  .lnav b{font-size:14px}
  .by{margin:30px 20px 0}
}
@media print{
  :root,:root:not([data-theme="light"]),:root[data-theme="dark"]{
    --bg:#fff; --card:#fff; --ink:#1d1d1f; --sub:#55555a; --line:#c9c9ce;
    --tonal:#f0f0f3; --node:#fff; --accent:#40650e; --accent-soft:#edf5dd; --c-red:#c0281f; --shadow:none;
  }
  body{padding:0;font-size:12px}
  .wrap{max-width:none;margin:0}
  nav.toc,.hero-bg{display:none !important}
  .chapters a,section.ch{box-shadow:none}
  section.ch{border:1px solid var(--line);margin-top:14px;padding:22px 22px 18px;border-radius:16px}
  .tl>li,.hrs,.cyc,.two,.grow,.point,.mis,.kf,.def,.f3,.fp,.rtable tr,.task,.item,pre.code{break-inside:avoid}
  h2,.fig-title{break-after:avoid}
  *{-webkit-print-color-adjust:exact;print-color-adjust:exact}
}