:root{--primary:#334155;--secondary:#1e293b;--accent:#f5f5dc;--bg:#ffffff;--surface:#f8fafc;--surface-alt:#f1f5f9;--text:#0f172a;--muted:#64748b;--border:#cbd5e1;--row-alt:#f8fafc;--radius:6px}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;color:var(--text);background:var(--bg);line-height:1.65;font-size:16px}
img{max-width:100%;height:auto;display:block}
a{color:var(--secondary);text-decoration:underline;text-underline-offset:2px}
a:hover{color:var(--primary)}
header.site{position:sticky;top:0;z-index:20;background:linear-gradient(90deg,var(--primary),var(--secondary));color:#fff;box-shadow:0 2px 10px rgba(0,0,0,.15)}
header.site .wrap{max-width:1120px;margin:0 auto;padding:.75rem 1rem;display:flex;flex-wrap:wrap;align-items:center;gap:1rem}
header.site a{color:#fff;text-decoration:none}
.brand{display:flex;align-items:center;gap:.6rem;font-weight:700;font-size:1.15rem}
.brand img{width:34px;height:34px}
nav.primary{margin-left:auto;display:flex;flex-wrap:wrap;gap:.25rem .9rem;font-size:.95rem}
nav.primary a{padding:.35rem .6rem;border-radius:var(--radius)}
nav.primary a:hover{background:rgba(255,255,255,.15)}
main{max-width:900px;margin:0 auto;padding:1.25rem 1rem 3rem}
.hero{background:linear-gradient(135deg,var(--surface-alt),var(--surface));border-radius:var(--radius);padding:1.6rem 1.4rem;margin:1rem 0 1.4rem;border-left:6px solid var(--primary)}
h1{font-size:1.85rem;margin:.2rem 0 .6rem;line-height:1.2;color:var(--secondary)}
h2{font-size:1.35rem;margin:2rem 0 .7rem;padding:.55rem .85rem;border-left:5px solid var(--primary);background:var(--surface);border-radius:0 var(--radius) var(--radius) 0;color:var(--secondary)}
h3{font-size:1.1rem;margin:1.3rem 0 .5rem;color:var(--secondary)}
p{margin:.7rem 0}
.byline{color:var(--muted);font-size:.9rem;margin:.3rem 0 1rem}
.badge{display:inline-block;background:var(--accent);color:#1e293b;font-weight:700;padding:.15rem .55rem;border-radius:var(--radius);font-size:.8rem;border:1px solid var(--border)}
.compliance{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:.7rem .9rem;margin:1rem 0;font-size:.92rem}
nav.toc{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:.9rem 1rem;margin:1.2rem 0}
nav.toc strong{display:block;margin-bottom:.4rem;color:var(--secondary)}
nav.toc ol{margin:0;padding-left:1.2rem;columns:2;column-gap:1.5rem}
nav.toc a{text-decoration:none}
ul{list-style:none;padding-left:0}
ul li{padding-left:1.3rem;position:relative;margin:.35rem 0}
ul li::before{content:"\25B8";position:absolute;left:0;color:var(--primary);font-weight:700}
ol{counter-reset:step;list-style:none;padding-left:0}
ol li{counter-increment:step;padding-left:2.1rem;position:relative;margin:.5rem 0}
ol li::before{content:counter(step);position:absolute;left:0;top:0;width:1.55rem;height:1.55rem;border-radius:50%;background:var(--primary);color:var(--accent);display:flex;align-items:center;justify-content:center;font-size:.85rem;font-weight:700}
.table-wrap{overflow-x:auto;margin:1rem 0;border-radius:var(--radius);border:1px solid var(--border)}
table{width:100%;border-collapse:collapse;font-size:.95rem;background:#fff}
thead th{background:linear-gradient(90deg,var(--primary),var(--secondary));color:#fff;text-align:left;padding:.65rem .8rem}
tbody td{padding:.6rem .8rem;border-top:1px solid var(--border)}
tbody tr:nth-child(even) td{background:var(--row-alt)}
details{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:.55rem .9rem;margin:.55rem 0}
details summary{cursor:pointer;font-weight:600;list-style:none;color:var(--secondary);display:flex;justify-content:space-between;align-items:center}
details summary::-webkit-details-marker{display:none}
details summary::after{content:"\25BC";color:var(--primary);margin-left:.6rem;transition:transform .2s}
details[open] summary::after{transform:rotate(180deg)}
details p{margin:.55rem 0 .1rem}
.author-box{margin:2rem 0 1rem;background:linear-gradient(135deg,var(--surface-alt),var(--surface));border-radius:var(--radius);padding:1rem 1.1rem;display:flex;gap:1rem;align-items:flex-start;border:1px solid var(--border)}
.author-box img{width:64px;height:64px;border-radius:50%;flex-shrink:0}
.author-box strong{color:var(--secondary)}
.svg-inline{margin:1.2rem 0;background:var(--surface);border-radius:var(--radius);padding:.6rem}
footer.site{border-top:1px solid var(--border);background:var(--surface);margin-top:2rem}
footer.site .wrap{max-width:1120px;margin:0 auto;padding:1.2rem 1rem;display:flex;flex-wrap:wrap;gap:1rem;justify-content:space-between;font-size:.9rem;color:var(--muted)}
footer.site a{color:var(--secondary)}
@media(max-width:700px){nav.toc ol{columns:1}h1{font-size:1.55rem}h2{font-size:1.2rem}main{padding:.75rem .8rem 2rem}}
@media(min-width:980px){main{padding:1.5rem 1rem 3rem}}