/* Shared B reading template and the existing404/credits utilities only. */
.a-page,.u-page{background:var(--canvas)}
.a-breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:6px 10px;font-size:14px;line-height:1.5;color:var(--muted);margin-bottom:32px}
.a-breadcrumb a{display:inline-flex;align-items:center;min-height:44px;text-decoration:none}
.a-breadcrumb a:hover{text-decoration:underline}
.a-breadcrumb [aria-current]{color:var(--text)}
.a-header{padding-block:32px 64px;background:var(--canvas)}
.a-heading{max-width:1050px}
.a-eyebrow{font-size:14px;line-height:1.5;letter-spacing:.04em;text-transform:uppercase;color:var(--muted);margin-bottom:16px}
.a-header h1{font-size:clamp(36px,4.5vw,60px);line-height:1.12;letter-spacing:-.04em;font-weight:600;max-width:26ch}
.a-deck{max-width:69ch;color:var(--muted);font-size:20px;line-height:1.65;margin-top:26px}
.a-meta{display:flex;flex-wrap:wrap;gap:8px 24px;font-size:14px;line-height:1.6;color:var(--muted);margin-top:28px}
.a-meta time{white-space:nowrap}
.a-reading-shell{background:var(--surface);padding-block:56px 72px}
.a-reading-layout{display:grid;grid-template-columns:240px minmax(0,760px);gap:64px;align-items:start;max-width:1240px}
.a-sidebar{position:sticky;top:24px;max-height:calc(100vh - 48px);overflow:auto;min-width:0;padding:0 20px 12px 0}
.a-toc{border-top:1px solid var(--border)}
.a-toc summary{position:relative;min-height:52px;padding:16px 30px 16px 0;list-style:none;font-size:15px;font-weight:600;line-height:1.4;cursor:pointer}
.a-toc summary::-webkit-details-marker{display:none}
.a-toc summary::after{content:'+';position:absolute;right:4px;top:17px;font-size:21px;line-height:1;font-weight:400}
.a-toc[open]>summary::after{content:'−'}
.a-toc nav{display:grid}
.a-toc a{display:flex;align-items:center;min-height:44px;padding:10px 0;font-size:14px;line-height:1.5;text-decoration:none;border-bottom:1px solid var(--rule);color:var(--muted)}
.a-toc a:hover{color:var(--text);text-decoration:underline}
.a-body{min-width:0;color:var(--text)}
.a-body p{font-size:18px;line-height:1.8;max-width:69ch;overflow-wrap:anywhere}
.a-body .a-intro{font-size:21px;line-height:1.7;margin-bottom:42px}
.a-body>section{scroll-margin-top:28px}
.a-body>section+section{margin-top:44px}
.a-body h2{font-size:clamp(27px,2.7vw,34px);line-height:1.25;letter-spacing:-.03em;font-weight:600;margin-bottom:20px;max-width:33ch}
.a-body .a-scenario-note{font-size:15px;line-height:1.7;color:var(--muted);border-left:3px solid var(--focus);padding-left:20px;margin-bottom:32px}
.a-technical pre{max-width:100%;overflow-x:auto;white-space:pre;margin:22px 0;padding:24px;background:var(--feature);color:var(--feature-text);border:1px solid var(--border);font:16px/1.7 ui-monospace,Consolas,monospace;tab-size:2}
.a-technical code{font:inherit}
.a-technical pre:focus-visible{outline:3px solid var(--focus);outline-offset:4px}
.a-body .a-small{font-size:15px;line-height:1.75;color:var(--muted);margin-top:18px}
.a-checklist{background:var(--surface-muted);padding:28px}
.a-checklist .a-eyebrow{font-size:14px;margin-bottom:12px}
.a-checklist ul{margin:0;padding-left:22px}
.a-checklist li{font-size:18px;line-height:1.7;padding:9px 0}
.a-reference{border-top:1px solid var(--border);padding-top:30px}
.a-reference a{overflow-wrap:anywhere}
.a-service{padding:32px;background:var(--feature);color:var(--feature-text);--focus:var(--feature-accent)}
.a-service .a-eyebrow,.a-service p{color:var(--feature-muted)}
.a-service .a-eyebrow{font-size:14px}
.a-service-actions{display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;margin-top:26px}
.a-service-actions .b-button{background:var(--feature-accent);color:#081820;text-align:center}
.a-service-actions>a:not(.b-button),.a-guide-email{display:inline-flex;align-items:center;gap:10px;min-height:44px;font-size:16px;line-height:1.6;color:var(--feature-text);overflow-wrap:anywhere}
.a-guide-email{margin-top:16px}
.a-related{background:var(--canvas);padding-block:64px 72px}
.a-related-wrap{max-width:1240px}
.a-related-heading{display:flex;flex-wrap:wrap;gap:24px;justify-content:space-between;align-items:end;margin-bottom:30px}
.a-related-heading .a-eyebrow{margin-bottom:12px}
.a-related-heading h2{font-size:36px;line-height:1.2;font-weight:600}
.a-related-heading>a{display:inline-flex;align-items:center;gap:10px;min-height:44px;font-size:16px}
.a-related-list{border-top:1px solid var(--border)}
.a-related-list>a{display:flex;justify-content:space-between;align-items:center;gap:32px;text-decoration:none;padding-block:26px;border-bottom:1px solid var(--rule)}
.a-related-list>a>div{min-width:0}
.a-related-list>a>span:last-child{flex:none;font-size:25px;color:var(--focus)}
.a-related-meta{display:flex;flex-wrap:wrap;gap:8px 20px;font-size:14px;line-height:1.5;color:var(--muted);margin-bottom:12px}
.a-related-list h3{font-size:24px;line-height:1.3;letter-spacing:-.025em;font-weight:500;margin-bottom:12px}
.a-related-list p{max-width:75ch;font-size:16px;line-height:1.65;color:var(--muted)}
.a-related-list>a:hover h3{text-decoration:underline;text-underline-offset:5px}
.u-error{padding-block:96px 112px;min-height:65vh}
.u-error-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:80px;align-items:center}
.u-error-code{font:500 clamp(100px,14vw,200px)/1 Space Grotesk,Arial,sans-serif;letter-spacing:-.08em;color:var(--muted)}
.u-page h1{font-size:clamp(40px,5vw,68px);line-height:1.08;font-weight:600;letter-spacing:-.04em;max-width:20ch}
.u-error h1{margin-bottom:26px}
.u-error p:not(.a-eyebrow):not(.u-error-code){font-size:18px;line-height:1.7;color:var(--muted);max-width:50ch}
.u-actions{display:flex;flex-wrap:wrap;align-items:center;gap:12px 24px;margin-top:28px}
.u-actions>a:not(.b-button){display:inline-flex;gap:10px;align-items:center;min-height:44px;font-size:16px}
.u-credits{padding-block:32px 88px}
.u-credits-layout{display:grid;grid-template-columns:1fr 1fr;gap:80px}
.u-brand-art{display:flex;align-items:center;gap:18px;margin-top:36px}
.u-brand-art>span{display:grid;place-items:center;width:96px;height:96px;background:#f7f3eb;flex:none;border-radius:4px}
.u-brand-art img{display:block;object-fit:contain;filter:none}
.u-brand-art figcaption{font-size:14px;line-height:1.5;color:var(--muted)}
.u-credit-copy{padding-top:90px}
.u-credit-copy>section{padding-block:28px;border-top:1px solid var(--border)}
.u-credit-copy h2{font-size:27px;line-height:1.25;font-weight:600;margin-bottom:18px}
.u-credit-copy p{font-size:18px;line-height:1.8;color:var(--muted);max-width:62ch}
.u-back{display:inline-flex;align-items:center;gap:12px;min-height:44px;font-size:16px;margin-top:20px}
@media(max-width:1100px){.a-reading-layout{grid-template-columns:210px minmax(0,1fr);gap:40px}.u-error-layout,.u-credits-layout{gap:48px}.u-error-code{font-size:150px}}
@media(max-width:900px){.a-reading-layout{grid-template-columns:1fr;gap:36px;max-width:850px}.a-sidebar{position:static;max-height:none;overflow:visible;padding:0}.a-toc nav{padding-bottom:8px}.a-body .a-intro{max-width:69ch}.u-error-layout{grid-template-columns:1fr;gap:32px}.u-error-code{font-size:120px}.u-credits-layout{grid-template-columns:1fr;gap:40px}.u-credit-copy{padding-top:0}}
@media(max-width:700px){.a-header{padding-block:24px 40px}.a-breadcrumb{margin-bottom:24px;gap:4px 8px}.a-header h1{font-size:34px;max-width:26ch}.a-deck{font-size:18px;line-height:1.7;margin-top:22px}.a-meta{margin-top:22px;gap:8px 18px}.a-reading-shell{padding-block:36px 48px}.a-reading-layout{gap:32px}.a-body p{font-size:18px;line-height:1.8}.a-body .a-intro{font-size:20px;line-height:1.75;margin-bottom:34px}.a-body h2{font-size:28px;line-height:1.3;margin-bottom:18px}.a-body>section+section{margin-top:36px}.a-body .a-scenario-note{font-size:15px;padding-left:16px;margin-bottom:28px}.a-technical pre{padding:18px;font-size:15px}.a-checklist{padding:22px}.a-checklist li{font-size:17px}.a-service{padding:24px}.a-service-actions{display:grid;grid-template-columns:1fr;gap:14px}.a-service-actions .b-button{padding-inline:16px;gap:10px;max-width:100%}.a-service-actions>a:not(.b-button),.a-guide-email{font-size:16px}.a-related{padding-block:48px}.a-related-heading h2{font-size:32px}.a-related-list>a{gap:20px;padding-block:24px}.a-related-list h3{font-size:23px}.a-related-list p{font-size:16px}.u-error{padding-block:48px 64px;min-height:0}.u-error-code{font-size:96px}.u-page h1{font-size:42px}.u-error h1{margin-bottom:22px}.u-actions{display:grid;grid-template-columns:1fr;gap:14px}.u-actions .b-button{width:100%}.u-credits{padding-block:24px 56px}.u-credits-layout{gap:36px}.u-brand-art{margin-top:28px;gap:16px}.u-brand-art>span{width:84px;height:84px}.u-credit-copy h2{font-size:25px}.u-credit-copy>section{padding-block:24px}}
@media(max-width:359px){.a-header h1{font-size:31px}.a-body h2{font-size:26px}.a-checklist{padding:18px}.a-service{padding:20px}.a-related-list h3{font-size:22px}.u-page h1{font-size:38px}.u-brand-art{align-items:start}.u-brand-art figcaption{max-width:15ch}}