:root{color-scheme:light;--bg:#f7f6f1;--panel:#fff;--ink:#172e2d;--muted:#526460;--subtle:#5c6d65;--accent:#143b3a;--on-accent:#fff;--line:#d9ded5;--warning:#865a16}
:root[data-theme=dark]{color-scheme:dark;--bg:#102827;--panel:#1c3734;--ink:#f4f6ee;--muted:#bfcec7;--subtle:#a9bdb3;--accent:#c8e2ac;--on-accent:#143b3a;--line:#49635b;--warning:#f1ca7d}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:1rem/1.65 system-ui,-apple-system,"Segoe UI",sans-serif}
a{color:var(--accent);text-underline-offset:.2em;overflow-wrap:anywhere}a:hover{color:var(--ink)}a:focus-visible{outline:3px solid var(--accent);outline-offset:4px}
.skip{position:absolute;left:1rem;top:-6rem;padding:.6rem 1rem;background:var(--ink);color:var(--bg)}.skip:focus{top:1rem}
header,main,footer{max-width:960px;margin:auto;padding:1.5rem 2rem}header{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:1rem;border-bottom:1px solid var(--line)}
.brand{color:var(--ink);font-size:1.2rem;font-weight:750;text-decoration:none}nav{display:flex;flex-wrap:wrap;gap:.6rem 1.2rem;font-size:.94rem}nav a[aria-current=page]{color:var(--ink);text-decoration-thickness:2px}
main{padding-top:2.5rem;padding-bottom:3rem}.eyebrow{color:var(--accent);font-size:.8rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase}
h1{font-size:clamp(2rem,6vw,3.1rem);line-height:1.15;letter-spacing:-.035em;margin:.6rem 0 1rem}h2{font-size:1.3rem;line-height:1.35;margin:2.4rem 0 .65rem}p,li,dd{color:var(--muted)}p{margin:.7rem 0}li{margin:.45rem 0}strong{color:var(--ink)}
.meta{color:var(--subtle);font-size:.88rem}.notice,.card{padding:1.1rem 1.4rem;border:1px solid var(--line);border-radius:14px;background:var(--panel);margin:1.4rem 0}.notice{border-left:4px solid var(--warning)}.notice p{margin:0}.card h2{margin-top:0}
.button{display:inline-block;margin:.6rem 0;padding:.7rem 1.15rem;background:var(--accent);color:var(--on-accent);border-radius:9px;font-weight:700;text-decoration:none}.button:hover{background:var(--ink);color:var(--bg)}
.toc{display:flex;flex-wrap:wrap;gap:.5rem 1.25rem;padding:1rem 0}dl{margin:0}dt{font-weight:700;margin-top:1rem}dd{margin:.25rem 0 1rem}footer{border-top:1px solid var(--line);font-size:.88rem;padding-bottom:2.5rem}
@media(max-width:520px){header,main,footer{padding-left:1.2rem;padding-right:1.2rem}main{padding-top:1.7rem}.card,.notice{padding:1rem}ul,ol{padding-left:1.35rem}}
@media print{:root,:root[data-theme=dark]{--bg:white;--panel:white;--ink:black;--muted:#222;--subtle:#444;--accent:#0645ad;--line:#aaa;--warning:#444;color-scheme:light}header nav,.skip,.button{display:none}header,main,footer{max-width:none;padding:1rem 0}.brand{color:black}.notice,.card{break-inside:avoid}}