:root{
  --ink:#13283C; --navy:#1A3A52; --blue:#2C5AA0; --orange:#FF7043; --orange-hot:#F25C2A;
  --paper:#F5F8FA; --white:#FFFFFF; --line:#DCE3EA; --muted:#54677A; --warn-bg:#FFF6E0; --warn:#9A6700;
  --font-display:"Bricolage Grotesque","Segoe UI",sans-serif;
  --font-body:"Instrument Sans","Segoe UI",sans-serif;
  --font-mono:"IBM Plex Mono",ui-monospace,monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:var(--font-body);color:var(--ink);background:var(--paper);line-height:1.65;font-size:1.02rem;-webkit-font-smoothing:antialiased}
a{color:var(--blue);text-underline-offset:2px}
.wrap{max-width:48rem;margin:0 auto;padding:0 clamp(1.1rem,4vw,2rem)}
.nav{background:#fff;border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px;max-width:48rem;margin:0 auto;padding:0 clamp(1.1rem,4vw,2rem)}
.brand{display:flex;align-items:baseline;gap:.5rem;text-decoration:none}
.brand-mark{font-family:var(--font-display);font-weight:800;font-size:1.12rem;color:var(--ink)}
.brand-mark .dot{color:var(--orange)}
.nav-back{font-size:.9rem;font-weight:600}
.draft-banner{background:var(--warn-bg);color:var(--warn);border-bottom:1px solid #F0E2B8;font-family:var(--font-mono);font-size:.8rem;letter-spacing:.02em;text-align:center;padding:.6rem 1rem}
main{padding:clamp(2.2rem,5vw,3.5rem) 0 4rem}
h1{font-family:var(--font-display);font-weight:800;font-size:clamp(1.9rem,4vw,2.6rem);letter-spacing:-0.015em;line-height:1.1;margin-bottom:.5rem}
.doc-meta{font-family:var(--font-mono);font-size:.78rem;color:var(--muted);letter-spacing:.04em;margin-bottom:2rem;padding-bottom:1.4rem;border-bottom:1px solid var(--line)}
h2{font-family:var(--font-display);font-weight:700;font-size:1.3rem;letter-spacing:-0.01em;margin:2.2rem 0 .7rem}
h3{font-family:var(--font-display);font-weight:700;font-size:1.05rem;margin:1.4rem 0 .5rem}
p{margin-bottom:.9rem}
ul,ol{margin:0 0 .9rem 1.4rem}
li{margin-bottom:.45rem}
.lead{font-size:1.1rem;color:var(--muted);margin-bottom:1.6rem}
.note{background:#fff;border:1px solid var(--line);border-left:3px solid var(--orange);border-radius:8px;padding:.9rem 1.1rem;font-size:.92rem;color:var(--muted);margin:1.2rem 0}
.note b{color:var(--ink)}
.toc{background:#fff;border:1px solid var(--line);border-radius:10px;padding:1.1rem 1.3rem;margin-bottom:2rem}
.toc h2{margin:0 0 .6rem;font-size:.78rem;font-family:var(--font-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--blue)}
.toc ol{margin:0 0 0 1.2rem;font-size:.95rem}
.toc a{text-decoration:none}
.toc a:hover{text-decoration:underline}
footer{border-top:1px solid var(--line);background:#fff;padding:1.6rem 0;font-size:.85rem;color:var(--muted)}
footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:.6rem}
footer a{color:var(--ink)}