:root{color-scheme:dark;--bg:#1e1e1e;--panel:#252526;--line:#3c3c3c;--text:#e2e2e5;--muted:#b0b0b7;--blue:#69baff;--mono:ui-monospace,SFMono-Regular,Consolas,monospace;--sans:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}*{box-sizing:border-box}body{margin:0;background:#181818;color:var(--text);font:18px/1.75 var(--sans)}a{color:var(--blue);text-underline-offset:.22em}a:hover{color:#b0dfff}a:focus-visible,summary:focus-visible,button:focus-visible{outline:2px solid var(--blue);outline-offset:4px}h1,h2,h3{line-height:1.2;font-weight:600;letter-spacing:-.025em;color:#f4f4f6}h1{font-size:clamp(2.4rem,4.5vw,4.5rem);margin:.4em 0;max-width:1000px;overflow-wrap:anywhere}h2{font-size:1.7rem;margin:1.7em 0 .65em}p{margin:.8em 0 1.2em}main p,main ul,main ol,main dl{max-width:850px}main li{margin:.65em 0}main{min-width:0;background:var(--bg)}.masthead{height:82px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);background:#202021;padding:0 36px;gap:20px}.brand{font-size:22px;color:#f4f4f6;text-decoration:none;font-weight:600;letter-spacing:-.02em;line-height:1.4}.brand span{display:block;font:11px/1.7 var(--mono);color:var(--muted);letter-spacing:.03em}.site-label,.nav-label{font:10px/1.5 var(--mono);letter-spacing:.15em;color:var(--muted)}.shell{display:grid;grid-template-columns:260px minmax(0,1fr);min-height:calc(100vh - 82px);gap:12px;padding:12px}.sidebar,main{border:1px solid var(--line);border-radius:6px}.sidebar{background:var(--panel);padding:26px 16px;display:flex;flex-direction:column;position:sticky;top:12px;height:calc(100vh - 24px);overflow-y:auto}.nav-label{padding:0 14px 18px}nav>a,nav summary{display:block;padding:9px 14px;color:#d1d1d7;text-decoration:none;font-size:15px;line-height:1.5;border-radius:4px}nav a:hover,nav summary:hover{background:#303034;color:#fff}nav a[aria-current]{background:#303e4a;color:#c7e6ff;box-shadow:inset 2px 0 #69baff}nav summary{cursor:pointer;display:list-item;margin-left:14px;padding-left:0}nav details{margin:3px 0}.tree{margin:4px 0 12px 20px;border-left:1px solid #505054}.tree a{display:block;text-decoration:none;font-size:13px;line-height:1.5;padding:9px 12px;color:#c0c0c8}.nav-separator{border-top:1px solid var(--line);margin:22px 14px 12px}.sidebar-bottom{margin-top:auto;padding:65px 14px 0;font:12px/1.8 var(--mono);color:var(--muted)}.sidebar-bottom a{font:12px var(--sans)}.content{max-width:1200px;margin:auto;padding:30px clamp(24px,5vw,78px) 0}.breadcrumb{font:11px/1.6 var(--mono);color:var(--muted);display:flex;gap:13px;flex-wrap:wrap;margin-bottom:46px}.breadcrumb a{color:var(--muted);text-decoration:none}.eyebrow{font:11px/1.7 var(--mono);color:var(--blue);text-transform:uppercase;letter-spacing:.12em}.lead{font-size:clamp(1.15rem,1.6vw,1.4rem);line-height:1.6;color:#c3c3cb;max-width:820px}.page-heading{margin-bottom:38px}.intro-panel{display:grid;grid-template-columns:1.4fr 1fr;align-items:center;gap:32px;border:1px solid var(--line);border-radius:6px;background:linear-gradient(130deg,#26272a,#202125);padding:30px;margin:35px 0}.intro-panel h2{font-size:1.85rem;margin:.4em 0}.intro-panel p{font-size:16px;color:#c4c4cc}.intro-panel .eyebrow{color:var(--blue);font-size:10px}.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin:34px 0}.card{position:relative;display:flex;flex-direction:column;padding:24px 32px 36px 24px;border:1px solid var(--line);border-radius:6px;background:#242426;text-decoration:none}.card:hover{border-color:#699abd;background:#292d32}.card h2{font-size:1.4rem;margin:17px 0 8px}.card p{font-size:16px;line-height:1.65;color:#c0c0c7;margin:4px 0 14px}.number,.meta{font:10px/1.6 var(--mono);letter-spacing:.08em;color:var(--blue)}.card-arrow{position:absolute;right:20px;bottom:14px}.button{display:inline-block;font-size:15px;text-decoration:none;border:1px solid #507b9d;border-radius:5px;padding:9px 18px;background:#26394a}.status-note,.reading-note{border-left:2px solid #69baff;padding:5px 0 5px 24px;margin:35px 0;color:#c4c4cc}.status-note{font-size:15px}.reading-note h2{font-size:1.4rem;margin-top:10px}.reading-note p{font-size:17px}.resource{border-top:1px solid var(--line);padding:22px 0 12px}.resource h2{font-size:1.4rem;margin:12px 0}.resource p{font-size:17px}.resource .meta{font-size:10px;margin:0;color:var(--muted)}.resource h2 a{text-decoration:none}.resource h2 a:hover{text-decoration:underline}.definitions{border-top:1px solid var(--line);padding-top:15px}.definitions dt{font:600 16px/1.6 var(--mono);color:var(--blue);margin-top:15px}.definitions dd{margin:4px 0 16px;font-size:17px}.document-note,.editorial{font-size:13px;color:var(--muted)}.editorial{border-top:1px solid var(--line);padding-top:16px}.steps{padding-left:28px}.steps>li{padding:0 0 24px 12px;border-bottom:1px solid var(--line)}.steps li::marker{color:var(--blue);font-family:var(--mono)}.steps h2{font-size:1.5rem;margin-top:25px}.steps .output{font-size:14px;color:var(--muted)}.table-wrap{overflow:auto}table{border-collapse:collapse;width:100%;font-size:16px;text-align:left}caption{text-align:left;color:var(--muted);font-size:13px;margin-bottom:14px}th,td{padding:16px;border:1px solid var(--line);vertical-align:top}thead{background:#292a2d}tbody th{font-weight:500;min-width:160px;color:#d9eafa}.related{font-size:16px;margin-top:30px}.contact-callout{border-left:2px solid var(--blue);padding:5px 0 5px 25px;margin:45px 0}.contact-callout h2{margin-top:0}footer{margin-top:65px;padding:25px 0;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px;font:11px/1.6 var(--mono);color:var(--muted)}.skip{position:fixed;left:20px;top:-100px;z-index:5;padding:8px 16px;background:white;color:black}.skip:focus{top:12px}.menu-toggle{display:none;background:#29323a;border:1px solid #526675;border-radius:5px;color:var(--text);padding:10px 12px;font:14px var(--sans)}@media(max-width:1050px){.shell{grid-template-columns:225px minmax(0,1fr)}.content{padding:25px 30px 0}.intro-panel{grid-template-columns:1fr}.cards{grid-template-columns:1fr}}@media(max-width:700px){body{font-size:17px}.masthead{height:76px;padding:0 20px}.site-label{display:none}.menu-toggle{display:block}.shell{display:block;padding:8px}.sidebar{position:static;height:auto;margin-bottom:8px;padding:18px 12px}.sidebar.collapsed{display:none}.sidebar-bottom{display:none}.content{padding:24px 22px 0}.breadcrumb{margin-bottom:30px}.page-heading{margin-bottom:28px}h1{font-size:clamp(2rem,8vw,2.5rem)}h2{font-size:1.5rem}.intro-panel{padding:23px;margin-top:25px;gap:18px}.intro-panel .eyebrow{font-size:10px}.cards{gap:12px}.card{padding:23px 30px 30px 23px}.steps{padding-left:22px}.steps>li{padding-left:4px}.resource p{font-size:17px}.status-note,.reading-note{padding-left:18px}.definitions dd{font-size:17px}footer{margin-top:45px}.table-wrap{margin:0 -4px}th,td{padding:11px}.brand{font-size:21px}}@media print{body{background:white;color:black;font-size:11pt}.sidebar,.masthead,.breadcrumb,.skip,footer{display:none}.shell{display:block}.content{padding:0}main{border:0}h1,h2,h3,.lead,a{color:black}.card,.intro-panel{background:white}.cards{display:block}.resource{break-inside:avoid}}

/* Requirements families: grouped h2 headings with publication-level h3 links. */
.resource h3{font-size:1.4rem;margin:12px 0}.resource h3 a{text-decoration:none}.resource h3 a:hover{text-decoration:underline}.resource .document-note{font-size:13px}

.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

.brain-art{margin:0;max-width:320px;width:100%;justify-self:center}.brain-art img{display:block;width:100%;height:auto;border-radius:4px}@media(max-width:1050px){.brain-art{max-width:280px}}