:root {
  --canvas: #F4F6F8; --surface: #FFFFFF; --muted: #EEF1F5;
  --ink: #0B1F3A; --ink-2: #6B7A90; --hairline: #E7EBF0;
  --accent: #0E9F6E; --accent-soft: #E2F5EE; --amber: #D97F06;
  --red: #DC2626; --radius: 20px;
  --shadow: 0 1px 2px rgba(11,31,58,.04),0 8px 24px rgba(11,31,58,.06);
}
@media(prefers-color-scheme:dark){:root{
  --canvas:#0A111C;--surface:#141D2B;--muted:#1D2839;
  --ink:#EDF2F8;--ink-2:#93A0B4;--hairline:#243146;
  --accent:#2DD4A0;--accent-soft:#12352D;--amber:#F5A524;--red:#F87171;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.25)
}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;font-size:17px;line-height:1.6;color:var(--ink);background:radial-gradient(900px 500px at 100% -10%,color-mix(in srgb,var(--accent) 12%,transparent),transparent 70%),var(--canvas);background-attachment:fixed;min-height:100vh}
a{color:var(--accent);text-underline-offset:3px}a:hover{text-decoration-thickness:2px}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:6px}
.skip-link{position:absolute;left:-999px;top:8px;background:var(--surface);padding:8px 14px;border-radius:10px;z-index:10}.skip-link:focus{left:12px}
.site-header{position:sticky;top:0;z-index:5;background:color-mix(in srgb,var(--canvas) 82%,transparent);backdrop-filter:saturate(180%) blur(16px);-webkit-backdrop-filter:saturate(180%) blur(16px);border-bottom:1px solid var(--hairline)}
.header-inner{max-width:880px;margin:0 auto;padding:12px 20px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-weight:700;font-size:18px;letter-spacing:-.01em}
.brand img{width:34px;height:34px;border-radius:9px;box-shadow:var(--shadow)}
nav ul{list-style:none;margin:0;padding:0;display:flex;gap:4px;flex-wrap:wrap}
nav a{display:inline-block;padding:8px 12px;border-radius:999px;color:var(--ink-2);text-decoration:none;font-size:15px;font-weight:500}
nav a:hover{color:var(--ink);background:var(--muted)}nav a[aria-current="page"]{color:var(--accent);background:var(--accent-soft);font-weight:600}
main{max-width:880px;margin:0 auto;padding:32px 20px 56px}.hero{padding:28px 0 20px}
.hero .eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--accent);background:var(--accent-soft);padding:4px 10px;border-radius:999px}
h1{font-size:clamp(30px,6vw,44px);line-height:1.12;letter-spacing:-.025em;margin:14px 0 10px}
.lede{font-size:19px;color:var(--ink-2);margin:0;max-width:640px}.meta{font-size:14px;color:var(--ink-2);margin-top:14px}
h2{font-size:22px;letter-spacing:-.015em;margin:0 0 10px;line-height:1.3}h3{font-size:17px;margin:18px 0 6px}
p,ul,ol{margin:0 0 12px}ul,ol{padding-left:22px}li{margin-bottom:6px}strong{font-weight:650}
.card{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--hairline);padding:22px 22px 12px;margin:16px 0}
.summary{background:linear-gradient(135deg,var(--accent-soft),var(--surface));border:1px solid color-mix(in srgb,var(--accent) 25%,var(--hairline))}
.summary ul{list-style:none;padding:0}.summary li{position:relative;padding-left:28px}
.summary li::before{content:"\2713";position:absolute;left:0;top:3px;width:18px;height:18px;border-radius:50%;background:var(--accent);color:var(--surface);font-size:11px;font-weight:800;line-height:18px;text-align:center}
.tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;margin:24px 0}
.tile{display:block;text-decoration:none;color:var(--ink);background:var(--surface);border:1px solid var(--hairline);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;transition:transform .15s ease,border-color .15s ease}
.tile:hover{transform:translateY(-2px);border-color:color-mix(in srgb,var(--accent) 45%,var(--hairline))}
.tile .icon{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:var(--accent-soft);color:var(--accent);margin-bottom:12px}
.tile .icon svg{width:22px;height:22px}.tile h2{font-size:18px;margin:0 0 4px}.tile p{color:var(--ink-2);font-size:15px;margin:0}
.table-wrap{overflow-x:auto;margin:0 0 12px}table{width:100%;border-collapse:collapse;font-size:15px}th,td{text-align:left;padding:10px 8px;border-bottom:1px solid var(--hairline);vertical-align:top}th{color:var(--ink-2);font-weight:600;font-size:13px;text-transform:uppercase;letter-spacing:.04em}tr:last-child td{border-bottom:0}
details{background:var(--surface);border:1px solid var(--hairline);border-radius:16px;margin:10px 0;box-shadow:var(--shadow)}
summary{cursor:pointer;list-style:none;padding:16px 48px 16px 18px;font-weight:600;position:relative}summary::-webkit-details-marker{display:none}
summary::after{content:"";position:absolute;right:20px;top:50%;width:9px;height:9px;border-right:2px solid var(--ink-2);border-bottom:2px solid var(--ink-2);transform:translateY(-70%) rotate(45deg);transition:transform .2s ease}
details[open] summary::after{transform:translateY(-30%) rotate(-135deg)}details>div{padding:0 18px 8px;color:var(--ink)}
.callout{border-left:4px solid var(--amber);background:color-mix(in srgb,var(--amber) 10%,var(--surface));border-radius:12px;padding:14px 16px;margin:12px 0}
.contact{display:flex;align-items:center;gap:16px;flex-wrap:wrap}.button{display:inline-flex;align-items:center;gap:8px;padding:12px 20px;border-radius:14px;background:var(--accent);color:#fff;font-weight:600;text-decoration:none;min-height:48px}
@media(prefers-color-scheme:dark){.button{color:#04241B}}.button:hover{filter:brightness(1.05)}
.toc{font-size:15px}.toc ol{columns:2;column-gap:28px;margin:0}
footer{max-width:880px;margin:0 auto;padding:24px 20px 40px;color:var(--ink-2);font-size:14px;border-top:1px solid var(--hairline)}footer nav ul{gap:0;margin-bottom:8px}footer nav a{padding:6px 10px 6px 0;font-size:14px}
@media(max-width:560px){body{font-size:16px}main{padding-top:16px}.card{padding:18px 16px 8px}nav a{padding:7px 10px;font-size:14px}.toc ol{columns:1}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
@media print{.site-header,footer nav{display:none}body{background:#fff;color:#000}.card,details{box-shadow:none}}