:root {
  --ink:#282828;
  --muted:#717171;
  --line:#e2e2e2;
  --blue:#575757;
  --blue-dark:#3e3e3e;
  --paper:#ffffff;
  --wash:#f6f6f6;
}
* { box-sizing:border-box; }
html { scroll-behavior:smooth; }
body { margin:0; color:var(--ink); background:var(--wash); font-family:"Noto Sans JP",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif; -webkit-font-smoothing:antialiased; }
a { color:inherit; }
.doc-nav { position:sticky; top:0; z-index:20; display:flex; align-items:center; justify-content:space-between; gap:24px; height:76px; padding:0 max(24px,calc((100vw - 1120px)/2)); border-bottom:1px solid rgba(222,222,222,.9); background:rgba(251,251,251,.92); backdrop-filter:blur(18px); }
.doc-brand { display:flex; align-items:center; gap:11px; color:#313131; font-size:15px; font-weight:850; text-decoration:none; }
.doc-brand img { width:32px; height:32px; }
.doc-nav nav { display:flex; align-items:center; gap:23px; }
.doc-nav nav a { color:#727272; font-size:11px; font-weight:750; text-decoration:none; }
.doc-nav nav a:hover { color:var(--blue); }
.doc-nav .doc-cta { padding:11px 16px; border-radius:9px; color:#ffffff; background:var(--blue); }
.doc-shell { width:min(1120px,calc(100% - 40px)); margin:0 auto; }
.doc-hero { display:grid; grid-template-columns:minmax(0,1.35fr) minmax(280px,.65fr); gap:72px; align-items:end; padding:92px 0 68px; }
.doc-kicker { display:block; margin-bottom:22px; color:var(--blue); font:800 10px/1 ui-monospace,SFMono-Regular,Menlo,monospace; letter-spacing:.14em; }
.doc-hero h1 { max-width:760px; margin:0; font-size:clamp(42px,6vw,78px); font-weight:900; line-height:1.08; letter-spacing:-.065em; }
.doc-hero p { margin:0 0 8px; color:var(--muted); font-size:14px; line-height:2; }
.doc-index { display:grid; grid-template-columns:repeat(3,1fr); overflow:hidden; margin:0 0 80px; border:1px solid var(--line); border-radius:22px; background:var(--paper); }
.doc-index a { min-height:230px; display:flex; flex-direction:column; padding:29px; border-right:1px solid var(--line); text-decoration:none; transition:background .2s,transform .2s; }
.doc-index a:last-child { border-right:0; }
.doc-index a:hover { background:#f9f9f9; }
.doc-index small { color:#8f8f8f; font:750 9px/1 ui-monospace,SFMono-Regular,Menlo,monospace; letter-spacing:.1em; }
.doc-index strong { margin:58px 0 13px; font-size:20px; letter-spacing:-.035em; }
.doc-index span { color:var(--muted); font-size:11px; line-height:1.8; }
.article-layout { display:grid; grid-template-columns:230px minmax(0,760px); gap:70px; align-items:start; padding:72px 0 100px; }
.article-toc { position:sticky; top:108px; display:grid; gap:5px; padding:19px 0; border-top:1px solid var(--line); border-bottom:1px solid var(--line); }
.article-toc small { margin:0 0 10px; color:#969696; font:800 9px/1 ui-monospace,SFMono-Regular,Menlo,monospace; letter-spacing:.12em; }
.article-toc a { padding:8px 0; color:#787878; font-size:11px; font-weight:700; text-decoration:none; }
.article-toc a:hover { color:var(--blue); }
.article { padding:48px clamp(28px,5vw,68px) 70px; border:1px solid var(--line); border-radius:24px; background:var(--paper); box-shadow:0 20px 55px rgba(60,60,60,.06); }
.article-header { margin-bottom:50px; padding-bottom:40px; border-bottom:1px solid var(--line); }
.article-header h1 { max-width:680px; margin:0; font-size:clamp(35px,5vw,58px); line-height:1.18; letter-spacing:-.055em; }
.article-header p { margin:22px 0 0; color:var(--muted); font-size:14px; line-height:2; }
.article h2 { scroll-margin-top:110px; margin:58px 0 20px; font-size:27px; line-height:1.45; letter-spacing:-.04em; }
.article h2:first-of-type { margin-top:0; }
.article h3 { margin:36px 0 12px; font-size:17px; letter-spacing:-.025em; }
.article p,.article li { color:#5f5f5f; font-size:13px; line-height:2.05; }
.article ul,.article ol { padding-left:1.4em; }
.article li + li { margin-top:8px; }
.article code { padding:.14em .4em; border-radius:4px; color:#4d4d4d; background:#f3f3f3; font-family:ui-monospace,SFMono-Regular,Menlo,monospace; font-size:.92em; }
.article pre { overflow:auto; margin:22px 0; padding:20px 22px; border-radius:12px; color:#ececec; background:#222222; }
.article pre code { padding:0; color:inherit; background:none; }
.note { margin:28px 0; padding:20px 22px; border-left:4px solid #909090; color:#5e5e5e; background:#f6f6f6; font-size:12px; line-height:1.9; }
.flow-list { margin:25px 0; padding:0; list-style:none; counter-reset:flow; }
.flow-list li { position:relative; min-height:72px; padding:12px 0 18px 60px; border-bottom:1px solid #ebebeb; counter-increment:flow; }
.flow-list li::before { position:absolute; top:10px; left:0; color:var(--blue); font:850 24px/1 ui-monospace,SFMono-Regular,Menlo,monospace; content:"0" counter(flow); }
.spec-table { width:100%; margin:24px 0; border-collapse:collapse; font-size:12px; }
.spec-table th,.spec-table td { padding:15px 13px; border-bottom:1px solid var(--line); text-align:left; vertical-align:top; }
.spec-table th { width:30%; color:#424242; }
.spec-table td { color:#6e6e6e; line-height:1.75; }
.related { display:grid; grid-template-columns:repeat(2,1fr); gap:12px; margin-top:56px; padding-top:34px; border-top:1px solid var(--line); }
.related a { padding:18px; border:1px solid var(--line); border-radius:11px; color:#4f4f4f; background:#fbfbfb; font-size:11px; font-weight:750; text-decoration:none; }
.related a:hover { border-color:#bebebe; color:var(--blue); }
.legal-shell { width:min(820px,calc(100% - 40px)); margin:0 auto; padding:74px 0 100px; }
.legal-shell .article { padding-top:58px; }
.legal-meta { margin-top:18px; color:#969696; font-size:10px; }
.doc-footer { display:grid; grid-template-columns:auto 1fr auto; align-items:center; gap:30px; padding:40px max(24px,calc((100vw - 1120px)/2)); border-top:1px solid var(--line); color:#808080; background:#f2f2f2; }
.doc-footer nav { display:flex; justify-content:center; flex-wrap:wrap; gap:10px 20px; }
.doc-footer a { font-size:10px; font-weight:700; text-decoration:none; }
.doc-footer p { margin:0; color:#a1a1a1; font-size:9px; }
@media (max-width:820px) {
  .doc-nav nav a:not(.doc-cta) { display:none; }
  .doc-hero { grid-template-columns:1fr; gap:24px; padding:64px 0 46px; }
  .doc-index { grid-template-columns:1fr; }
  .doc-index a { min-height:170px; border-right:0; border-bottom:1px solid var(--line); }
  .doc-index a:last-child { border-bottom:0; }
  .doc-index strong { margin-top:38px; }
  .article-layout { grid-template-columns:1fr; gap:24px; padding:40px 0 70px; }
  .article-toc { position:static; grid-template-columns:repeat(2,1fr); }
  .article-toc small { grid-column:1/-1; }
  .doc-footer { grid-template-columns:1fr; justify-items:start; }
  .doc-footer nav { justify-content:flex-start; }
}
@media (max-width:520px) {
  .doc-shell,.legal-shell { width:min(100% - 24px,1120px); }
  .doc-nav { height:68px; padding:0 14px; }
  .doc-nav .doc-cta { padding:9px 11px; font-size:10px; }
  .article { padding:38px 20px 48px; border-radius:17px; }
  .article-header { margin-bottom:38px; padding-bottom:30px; }
  .article h2 { font-size:23px; }
  .related { grid-template-columns:1fr; }
  .spec-table,.spec-table tbody,.spec-table tr,.spec-table th,.spec-table td { display:block; }
  .spec-table th { width:auto; padding-bottom:4px; border-bottom:0; }
  .spec-table td { padding-top:4px; }
}