:root{--navy:#0A1226;--blue:#2563EB;--sky:#60A5FA;--ink:#14213d;--muted:#5b6474;--line:#e6eaf0;--soft:#f7f9fc;--white:#fff;--success:#087a55;--warn:#8a5b00}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--white);line-height:1.65}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}.wrap{width:min(1120px,calc(100% - 40px));margin:auto}.topbar{border-bottom:1px solid var(--line);background:rgba(255,255,255,.96);position:sticky;top:0;z-index:10;backdrop-filter:blur(10px)}.nav{min-height:70px;display:flex;align-items:center;justify-content:space-between;gap:22px}.brand{display:flex;align-items:center;gap:18px;min-width:0}.brand img{height:34px;width:auto;display:block}.brand-sep{height:28px;width:1px;background:var(--line)}.brand-title{font-weight:750;color:var(--navy);letter-spacing:-.02em;white-space:nowrap}.navlinks{display:flex;align-items:center;gap:16px;font-size:.9rem}.navlinks a{color:#3f4a5c;white-space:nowrap}.navlinks a.active,.navlinks a:hover{color:var(--navy);text-decoration:none}.hero{padding:92px 0 72px;background:radial-gradient(circle at 82% 15%,rgba(96,165,250,.15),transparent 35%),linear-gradient(180deg,#fff 0%,#f8fbff 100%)}.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 10px;border:1px solid #d9e6ff;border-radius:999px;background:#f4f8ff;color:#244a9a;font-size:.82rem;font-weight:700;letter-spacing:.03em;text-transform:uppercase}.dot{width:7px;height:7px;background:var(--blue);border-radius:50%}.hero h1{font-size:clamp(2.55rem,6vw,5rem);line-height:1.02;letter-spacing:-.055em;color:var(--navy);margin:22px 0 22px;max-width:980px}.hero .lead{font-size:1.24rem;color:#465166;max-width:900px;margin:0 0 34px}.actions{display:flex;gap:12px;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;padding:11px 17px;border-radius:9px;font-weight:700;border:1px solid var(--line)}.btn.primary{background:var(--navy);color:#fff;border-color:var(--navy)}.btn.primary:hover{background:#15213d;text-decoration:none}.btn.secondary{background:#fff;color:var(--navy)}.btn.secondary:hover{border-color:#bcc7d8;text-decoration:none}.section{padding:72px 0}.section.alt{background:var(--soft)}.section h2{font-size:2rem;letter-spacing:-.035em;color:var(--navy);margin:0 0 12px}.section .intro{color:var(--muted);max-width:860px;margin:0 0 34px}.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}.card{border:1px solid var(--line);border-radius:14px;padding:24px;background:#fff;box-shadow:0 1px 1px rgba(10,18,38,.02)}.card h3{margin:0 0 8px;color:var(--navy);letter-spacing:-.02em}.card p{margin:0;color:var(--muted)}.card code{font-size:.82rem}.kicker{font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;color:var(--blue);font-weight:800}.code{background:#091225;color:#dce7ff;border-radius:12px;padding:20px;overflow:auto;font:14px/1.6 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}.caplist{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 18px;margin-top:24px}.cap{border:1px solid var(--line);background:#fff;border-radius:9px;padding:11px 13px;font:13px/1.4 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;color:#1e3a6d}.pill{display:inline-block;background:#edf8f3;color:var(--success);border:1px solid #ceeadd;border-radius:999px;padding:4px 9px;font-size:.78rem;font-weight:800}.pill.draft{background:#fff8e8;color:var(--warn);border-color:#f1dfb7}.prose{max-width:880px}.prose.wide{max-width:1040px}.prose h1{font-size:2.65rem;line-height:1.1;color:var(--navy);letter-spacing:-.045em;margin:0 0 18px}.prose h2{margin-top:42px}.prose h3{margin-top:28px;color:var(--navy)}.prose p,.prose li{color:#435066}.prose table{width:100%;border-collapse:collapse;margin:20px 0}.prose th,.prose td{text-align:left;border-bottom:1px solid var(--line);padding:12px 10px;vertical-align:top}.prose th{color:var(--navy)}.callout{border-left:4px solid var(--blue);background:#f6f9ff;padding:16px 18px;border-radius:0 10px 10px 0;margin:24px 0;color:#3d4b63}.boundary{border-left-color:#9a6400;background:#fffaf0}.rule{font-size:1.16rem;font-weight:750;color:var(--navy);padding:20px 22px;border:1px solid #d9e6ff;border-radius:12px;background:#f7faff;margin:24px 0}.muted{color:var(--muted)}.small{font-size:.9rem}.domain-id{font:12px/1.4 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;color:#1e3a6d;margin-top:12px}.flow{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:24px 0}.flow>div{border:1px solid var(--line);border-radius:12px;padding:18px;background:#fff}.flow strong{display:block;color:var(--navy);margin-bottom:5px}.footer{border-top:1px solid var(--line);padding:30px 0 40px;color:#697386;font-size:.88rem}.footerrow{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}.footerlinks{display:flex;gap:16px;flex-wrap:wrap}.mobiletag{display:none}
/* ABS umbrella identity: older ABCS pages remain normative content but share ABS site chrome. */
.brand-title{font-size:0}.brand-title::after{content:"ABS";font-size:1rem}.schema-actions{display:flex;gap:8px;flex-wrap:wrap}
@media(max-width:960px){.navlinks{gap:11px;font-size:.84rem}.grid4{grid-template-columns:repeat(2,1fr)}}@media(max-width:820px){.navlinks{display:none}.mobiletag{display:inline;color:var(--muted);font-size:.86rem}.grid4,.grid3,.grid2,.caplist,.flow{grid-template-columns:1fr}.hero{padding-top:68px}.brand-title{display:none}.brand-sep{display:none}.wrap{width:min(100% - 28px,1120px)}}