:root{--paper:#efede4;--surface:#faf9f3;--ink:#242723;--muted:#555b52;--accent:#914522;--accent-light:#cf956e;--line:#c2c4b8;--container:1192px;--display:"Arial Black","Helvetica Neue",Roboto,"Segoe UI",Arial,sans-serif;--text:"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--mono:"Cascadia Mono",SFMono-Regular,Menlo,Consolas,"Roboto Mono","Courier New",monospace}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:112px;background:var(--paper)}body{margin:0;color:var(--ink);font-family:var(--text);font-size:17px;line-height:1.65}a{color:inherit;text-underline-offset:4px}button{font:inherit}button,a{touch-action:manipulation}a:focus-visible,button:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--accent);outline-offset:5px}.site-shell{width:min(var(--container),calc(100% - 64px));margin:auto}.skip-link{position:fixed;left:16px;top:-90px;z-index:60;background:var(--surface);padding:12px}.skip-link:focus{top:12px}.utility-bar{background:var(--ink);color:var(--paper);border-top:5px solid var(--accent);font:700 11px/1.5 var(--mono);letter-spacing:.08em}.utility-inner{display:flex;justify-content:space-between;gap:20px;padding:9px 0}.topbar{position:sticky;top:0;z-index:30;background:var(--paper);border-bottom:1px solid var(--line)}.topbar-inner{min-height:84px;display:flex;align-items:center;justify-content:space-between;gap:32px}.brand{display:flex;align-items:baseline;gap:12px;font:900 28px/1 var(--display);letter-spacing:-1.5px;text-decoration:none}.brand span{font:700 10px var(--mono);letter-spacing:.12em;color:var(--muted)}.main-nav{display:flex;align-items:center;gap:32px}.main-nav a{font-size:14px;font-weight:750;text-decoration:none;padding:10px 0}.main-nav a:hover,.main-nav a[aria-current]{color:var(--accent);text-decoration:underline}.main-nav .nav-cta{padding:11px 18px;border:1px solid var(--ink)}.menu-toggle{display:none;border:1px solid var(--ink);background:transparent;padding:8px 14px;min-height:44px;font-weight:750}.breadcrumb{margin:28px 0 30px;display:flex;flex-wrap:wrap;gap:10px;font:600 12px/1.7 var(--mono);color:var(--muted)}.breadcrumb a{text-decoration:none}.breadcrumb a:hover{text-decoration:underline}.eyebrow{font:700 12px/1.5 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--accent);margin:0 0 20px}.home-hero{padding:80px 0 60px;display:grid;grid-template-columns:minmax(0,1.45fr) minmax(300px,.75fr);gap:74px;align-items:center}h1,h2,h3{font-family:var(--display);font-weight:900;letter-spacing:-.035em;line-height:1.13}h1{font-size:clamp(36px,4.4vw,64px);margin:0}.home-hero h1{font-size:clamp(44px,5.2vw,74px);line-height:1.035;max-width:760px}.home-hero h1 em{font-style:normal;color:var(--accent)}.claim{font-size:21px;font-weight:750;margin:28px 0 14px}.hero-intro{max-width:650px;font-size:18px;color:var(--muted);line-height:1.65;margin:0}.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}.button{min-height:48px;display:inline-flex;align-items:center;justify-content:center;padding:12px 20px;border:1px solid var(--ink);font-size:14px;font-weight:800;text-decoration:none}.button-primary{background:var(--accent);border-color:var(--accent);color:var(--surface)}.button:hover{background:var(--ink);color:var(--surface)}.terrain-card{align-self:stretch;margin:0;background:var(--ink);color:var(--paper);display:flex;flex-direction:column;border-top:5px solid var(--accent-light);padding:26px 28px}.terrain-card .eyebrow{color:var(--accent-light);font-size:11px}.terrain-card h2{font-size:48px;margin:16px 0 20px}.terrain-card p{color:#d6d8ce;font-size:16px;line-height:1.6}.terrain-card dl{margin:20px 0;display:grid;gap:16px}.terrain-card dl>div{border-top:1px solid #596055;padding-top:13px}.terrain-card dt{font:700 10px var(--mono);letter-spacing:.1em;color:#c3c6b8}.terrain-card dd{margin:5px 0 0;font-weight:700;line-height:1.4}.terrain-card a{margin-top:auto;padding-top:20px;font-size:14px;font-weight:800;color:var(--paper)}.home-content{max-width:var(--container);padding-bottom:80px}.home-content h2{font-size:clamp(28px,3vw,42px);margin:60px 0 26px;border-top:2px solid var(--ink);padding-top:28px}.home-content>p{max-width:830px}.home-content p:last-child{font:600 12px/1.8 var(--mono);color:var(--muted)}.guide-layout{display:grid;grid-template-columns:minmax(0,800px) 280px;gap:64px;padding-bottom:96px;align-items:start}.guide-head{padding:0 0 32px;border-bottom:2px solid var(--ink);margin-bottom:36px}.guide-head h1{max-width:920px}.guide-head .lead{font-size:19px;line-height:1.65;color:var(--muted);max-width:760px;margin:22px 0}.guide-meta{display:flex;gap:12px;flex-wrap:wrap;font:600 11px/1.7 var(--mono);color:var(--muted)}.guide-meta span+span{border-left:1px solid var(--line);padding-left:12px}.guide-article{min-width:0}.prose p{margin:0 0 22px}.prose h2{font-size:29px;margin:48px 0 22px;padding-top:18px;border-top:1px solid var(--line)}.prose h2:first-of-type{margin-top:30px}.prose h3{font-size:20px;margin:30px 0 13px;line-height:1.35}.prose li{margin:8px 0}.prose strong{font-weight:750}.prose a{color:var(--accent);font-weight:650;overflow-wrap:anywhere}.prose a:hover{text-decoration-thickness:2px}.prose ul,.prose ol{padding-left:24px}.table-scroll{max-width:100%;overflow-x:auto;margin:26px 0 30px;border:1px solid var(--line);background:var(--surface)}table{border-collapse:collapse;width:100%;font-size:15px;line-height:1.55}th,td{text-align:left;vertical-align:top;padding:16px 18px;border-bottom:1px solid var(--line);min-width:135px}th{background:#e1e3d7;font-size:12px;font-weight:800}tbody tr:last-child td{border-bottom:0}.table-note{display:block;font:600 11px/1.6 var(--mono);padding:10px 16px;border-top:1px solid var(--line);color:var(--muted)}.guide-sidebar{position:sticky;top:112px;min-width:0}.toc{border-top:3px solid var(--ink);padding:17px 0 20px}.toc summary{font:800 12px/1.6 var(--mono);text-transform:uppercase;letter-spacing:.045em;cursor:pointer;min-height:32px}.toc ol{padding:0;margin:18px 0;list-style:none;counter-reset:toc}.toc li{counter-increment:toc;border-top:1px solid var(--line)}.toc a{display:flex;gap:12px;padding:11px 0;font-size:13px;line-height:1.45;text-decoration:none}.toc a::before{content:counter(toc,decimal-leading-zero);color:var(--accent);font:600 10px/1.9 var(--mono);flex:none}.toc a:hover{text-decoration:underline}.official-channel{border:1px solid var(--line);padding:20px;margin:22px 0;background:var(--surface)}.official-channel .eyebrow{font-size:10px;margin-bottom:12px}.official-channel p{font-size:14px;margin:0 0 16px}.official-channel a{font-size:13px;font-weight:750;color:var(--accent)}.source-register{margin-top:52px;padding:25px;background:#e4e6da;border-top:3px solid var(--ink)}.source-register h2{font-size:22px;border:0;padding:0;margin:0 0 16px}.source-register ul{padding-left:20px}.source-register li{font-size:14px;margin:12px 0}.source-register p{font-size:13px;margin:16px 0 0}.public-footer{background:var(--ink);color:var(--paper);border-top:5px solid var(--accent-light);padding:52px 0 26px}.footer-inner{display:grid;grid-template-columns:1.4fr 1fr;gap:30px 64px}.footer-wordmark{font:900 34px var(--display);letter-spacing:-1px;text-decoration:none}.footer-inner p{font-size:15px;max-width:440px;color:#d6d8ce}.footer-inner nav{display:flex;gap:32px;align-items:start;padding-top:12px}.footer-inner nav a{font-size:14px;font-weight:750}.footer-inner .footer-note{font-size:12px;color:#c3c6b8;border-top:1px solid #596055;padding-top:22px;max-width:none;margin:0}.footer-region{font:600 11px var(--mono);letter-spacing:.035em;border-top:1px solid #596055;padding-top:22px;color:#c3c6b8}.not-found{min-height:55vh;padding:100px 0}.not-found p{max-width:650px}.hub-intro{max-width:800px}.hub-content{padding-bottom:84px}.hub-content h2{font-size:30px}.home-content .table-scroll table{font-size:17px}.home-content .table-scroll th{font-size:13px}.home-content .table-scroll td{padding:20px}.home-content .table-scroll a{font-weight:750;color:var(--accent)}
@media(min-width:981px){.home-content .table-scroll table{table-layout:fixed}.home-content .table-scroll td:first-child{width:48%}}
@media(max-width:980px){.site-shell{width:calc(100% - 40px)}.home-hero{gap:30px;padding-top:48px;grid-template-columns:minmax(0,1.25fr) minmax(260px,.75fr)}.home-hero h1{font-size:50px}.guide-layout{grid-template-columns:minmax(0,1fr) 230px;gap:32px}.brand span{display:none}.main-nav{gap:20px}.main-nav .nav-cta{display:none}.footer-inner{gap:24px}.terrain-card{padding:22px}.terrain-card h2{font-size:38px}}
@media(max-width:760px){html{scroll-padding-top:85px}.site-shell{width:calc(100% - 40px)}.utility-inner{padding:8px 0;font-size:9px}.utility-inner span:last-child{display:none}.topbar-inner{min-height:70px;flex-wrap:wrap;gap:0}.brand{font-size:26px}.js .menu-toggle{display:block}.main-nav{width:100%;border-top:1px solid var(--line);padding:10px 0 16px;display:flex;gap:24px}.main-nav a{font-size:14px;min-height:44px}.js .main-nav[data-collapsed=true]{display:none}.home-hero{grid-template-columns:1fr;gap:34px;padding:38px 0 30px}.home-hero h1{font-size:clamp(39px,10.5vw,58px);line-height:1.07}.eyebrow{font-size:11px;margin-bottom:20px}.claim{font-size:18px;margin:22px 0 14px}.hero-intro{font-size:16px}.actions{gap:10px;margin-top:24px}.button{flex:1;font-size:13px;white-space:nowrap;padding:12px 14px}.terrain-card{padding:24px}.terrain-card h2{font-size:40px;margin:7px 0 12px}.terrain-card dl{gap:12px;margin:12px 0}.terrain-card p{margin:10px 0}.home-content h2{margin:40px 0 20px;padding-top:22px;font-size:29px}.home-content>p{font-size:16px}.home-content .table-scroll table{font-size:15px}.home-content .table-scroll th,.home-content .table-scroll td{padding:14px;min-width:138px}.breadcrumb{font-size:10px;margin:21px 0 24px;gap:7px}.guide-head h1{font-size:36px;line-height:1.15;letter-spacing:-.045em}.guide-head .lead{font-size:17px;line-height:1.6;margin:20px 0}.guide-head{padding-bottom:24px;margin-bottom:24px}.guide-meta{font-size:10px;gap:8px}.guide-layout{display:flex;flex-direction:column;gap:26px;padding-bottom:56px}.guide-sidebar{position:static;order:-1;width:100%}.toc{padding-bottom:0}.toc ol{display:grid;grid-template-columns:1fr 1fr;gap:0 20px;margin:10px 0 0}.toc a{font-size:12px;min-height:44px}.official-channel{margin:20px 0 0}.official-channel p{font-size:13px}.prose{font-size:16px}.prose h2{font-size:25px;margin-top:38px;line-height:1.25}.prose h3{font-size:19px}.prose p{margin-bottom:20px}.table-scroll{margin:22px 0}table{font-size:14px}th,td{padding:13px;min-width:148px}.source-register{padding:22px 18px}.source-register h2{font-size:22px}.footer-inner{grid-template-columns:1fr;gap:22px}.footer-inner nav{gap:32px}.footer-region{border:0;padding-top:0}.public-footer{padding-top:36px}.footer-inner .footer-note{padding-top:18px}.hub-content{font-size:16px;padding-bottom:56px}.not-found{padding:70px 0}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
/* Column flex children must stay inside the mobile page width so tables scroll locally. */
@media(max-width:760px){.guide-article{width:100%}}
/* The original alpha assets retain their pixels. The logo box displays the centred lockup,
   excluding unused transparent canvas; neither the symbol nor the lettering is recreated. */
.brand-image{display:block;width:340px;height:56px;flex:none}
.brand-image img{display:block;width:100%;height:100%;object-fit:cover;object-position:center}
.footer-brand-image{display:inline-block;width:304px;height:62px;padding:9px 12px;background:var(--paper)}
.footer-brand-image img{display:block;width:100%;height:100%;object-fit:cover;object-position:center}
.brand-band{position:relative;width:100%;height:220px;margin:-70px 0 34px;overflow:hidden}
.brand-band-art{display:block;width:100%;height:100%;object-fit:fill}
.brand-band-label{position:absolute;left:20px;right:20px;bottom:24px;margin:0;text-align:center;color:var(--paper);font:600 16px/1.5 var(--mono);letter-spacing:.12em}
@media(max-width:980px){.brand-image{width:300px;height:50px}}
@media(max-width:760px){.brand-image{width:min(240px,calc(100% - 84px));height:44px}.footer-brand-image{max-width:100%}.brand-band{height:146px;margin:-32px 0 20px}.brand-band-art{width:760px;max-width:none;position:relative;left:50%;transform:translateX(-50%)}.brand-band-label{font-size:11px;letter-spacing:.09em;bottom:18px}}

/* AUT-857 Claude UI pass, reviewed locally: channel CTA, source jump,
   overflow-only hints, keyboard order and compact mobile contents. */
.official-channel{border-top:3px solid var(--accent)}
.channel-cta{display:flex;align-items:center;min-height:48px;padding:12px 16px;background:var(--accent);border:1px solid var(--accent);color:var(--surface)!important;font-size:14px!important;font-weight:800!important;line-height:1.35;text-decoration:none}
.channel-cta:hover{background:var(--ink);border-color:var(--ink)}
.guide-meta a{color:var(--accent);text-decoration:underline;text-decoration-thickness:1px}
.guide-meta a:hover{text-decoration-thickness:2px}
.guide-meta span+a{border-left:1px solid var(--line);padding-left:12px}
.table-scroll[data-overflow=false] .table-note{display:none}
.guide-article{grid-column:1;grid-row:1}
.guide-sidebar{grid-column:2;grid-row:1}
.toc summary{min-height:48px}
@media(max-width:760px){
  .guide-meta{column-gap:14px}
  .guide-meta span+span,.guide-meta span+a{border-left:0;padding-left:0}
  .toc{border-top:0;border-bottom:1px solid var(--line);padding:0}
  .toc[open] ol{margin-bottom:12px}
  .toc ol{grid-template-columns:1fr}
  .toc a{font-size:14px;padding:10px 0}
  .official-channel{padding:18px}
  .channel-cta{font-size:15px!important}
  .footer-inner{grid-template-columns:minmax(0,1fr)}
}
/* Service information stays in the footer closing line, following Vaca's pattern. */
.footer-region{display:flex;flex-wrap:wrap;align-items:baseline;gap:10px 20px;line-height:1.6}
.footer-legal{font-family:var(--text);font-size:12px;letter-spacing:0;color:var(--paper);text-decoration:none;white-space:nowrap}
.footer-legal:hover{text-decoration:underline}
.service-page{max-width:800px;padding-bottom:80px}
.service-page .guide-head{padding-top:30px}
.service-page h1{font-size:clamp(32px,4vw,52px)}
/* Transparent light variant of the approved single-M logo on the dark footer. */
.footer-brand-image{padding:0;background:transparent}