/* Shared static-site design. System fonts; no external requests. */
:root {
  --paper:#eff3f6; --white:#fff; --ink:#172d3b; --muted:#485e6c;
  --accent:#086c68; --line:#cbd7df; --tint:#e2efed;
  --accent-hover:#04534f; --focus:#986013; --soft-line:#dce5ea;
  --sans:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}
*{box-sizing:border-box}
html{scroll-padding-top:24px}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.65 var(--sans)}
a{color:var(--accent);text-underline-offset:.22em;text-decoration-thickness:1px}
a:hover{color:var(--accent-hover)}
button,summary{font:inherit;cursor:pointer}
:focus-visible{outline:3px solid var(--focus);outline-offset:4px}
main:focus{outline:none}
h1,h2,h3,p{margin-top:0}
h1,h2,h3{line-height:1.25;font-weight:650;letter-spacing:-.035em}
h1{font-size:clamp(2.15rem,3.6vw,3rem);line-height:1.12;margin-bottom:22px;letter-spacing:-.045em}
h2{font-size:1.65rem;margin-bottom:18px}
h3{font-size:1.1rem;letter-spacing:-.02em}
p{margin-bottom:20px}
.wrap{width:min(1140px,calc(100% - 64px));margin-inline:auto}
[hidden]{display:none!important}
.skip{position:fixed;left:16px;top:-100px;background:var(--ink);color:white;padding:12px 20px;z-index:20}
.skip:focus{top:12px}
.eyebrow{font-size:.72rem;line-height:1.5;font-weight:650;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);margin-bottom:16px}
.intro{font-size:1.08rem;line-height:1.8;color:var(--muted);max-width:680px}
.button{display:inline-flex;align-items:center;justify-content:center;gap:20px;min-height:46px;padding:11px 18px;border:1px solid var(--accent);border-radius:5px;background:var(--accent);color:white;text-decoration:none;font-size:.875rem;font-weight:600;line-height:1.5}
.button:hover{background:var(--accent-hover);color:white}
/* Header and navigation */
.site-header{border-bottom:1px solid var(--line);background:white}
.header-inner{min-height:86px;display:flex;align-items:center;gap:26px;flex-wrap:wrap}
.brand{font-size:1.65rem;font-weight:750;letter-spacing:-.07em;color:var(--ink);text-decoration:none;white-space:nowrap}
.brand span{color:var(--accent);font-weight:450}
.publisher{font-size:.75rem;line-height:1.5;max-width:160px;color:var(--muted);border-left:1px solid var(--line);padding-left:22px}
.publisher a{color:inherit}
.header-inner nav{display:flex;gap:5px;margin-left:auto}
.header-inner nav a{font-size:.875rem;font-weight:550;color:var(--ink);text-decoration:none;padding:10px 14px;border-radius:4px;min-height:44px}
.header-inner nav a:hover,.header-inner nav a[aria-current]{color:var(--accent);background:var(--tint)}
.menu-toggle{border:1px solid var(--line);background:white;color:var(--ink);padding:8px 15px;min-height:44px;border-radius:4px;font-size:.875rem}
/* Homepage: a clear starting point, followed by topics and supporting resources. */
.hero{padding:46px 0 38px}
.hero-copy{display:grid;grid-template-columns:1.15fr 1fr;gap:0 60px;align-items:start}
.hero .eyebrow{grid-column:1/-1;display:flex;align-items:center;gap:9px;margin-bottom:20px}
.hero .eyebrow:before{content:"";height:6px;width:6px;background:var(--accent);border-radius:50%;flex-shrink:0}
.hero h1{grid-column:1;grid-row:2/4;margin-bottom:0;font-size:clamp(2.15rem,3.65vw,3.1rem);max-width:600px}
.hero .intro{grid-column:2;grid-row:2;font-size:1rem;margin-bottom:20px}
.hero-actions{grid-column:2;display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.hero-actions>a:not(.button){display:inline-flex;align-items:center;gap:6px;min-height:44px;font-size:.85rem;font-weight:600;text-decoration:none}
.start{border:1px solid var(--line);border-radius:6px;background:white;display:grid;grid-template-columns:1fr 2fr;gap:52px;padding:30px}
.start h2{font-size:1.6rem;margin-bottom:15px}
.start>div>p:last-child{font-size:.9rem;color:var(--muted);max-width:280px;margin-bottom:0}
.start ol{list-style:none;padding:0;margin:0}
.start li{position:relative;display:flex;align-items:start;gap:17px;border-bottom:1px solid var(--line);padding:0 0 17px;margin-bottom:17px}
.start li:last-child{border:0;padding-bottom:0;margin-bottom:0}
.step-number{font:.75rem/30px ui-monospace,Consolas,monospace;color:var(--accent);background:var(--tint);border-radius:4px;width:32px;min-width:32px;text-align:center}
.start h3{font-size:1rem;margin:1px 0 7px}
.start h3 a{color:var(--ink);text-decoration:none}
.start h3 a:after{content:"";position:absolute;inset:-6px -8px 6px;z-index:1}
.start h3 a:hover{text-decoration:underline}
.start li p{font-size:.875rem;color:var(--muted);margin:0;line-height:1.65}
.start li>span:last-child{margin-left:auto;color:var(--accent)}
.home-topics{display:flex;align-items:center;gap:10px 24px;flex-wrap:wrap;border-bottom:1px solid var(--line);padding:18px 0;margin-bottom:34px;font-size:.84rem}
.home-topics>span{color:var(--muted);font-size:.75rem;margin-right:auto}
.home-topics a{display:inline-flex;align-items:center;min-height:40px}
.section-intro{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-top:0}
.section-intro h2{font-size:1.8rem;margin:0}
.section-intro>a{font-size:.85rem;white-space:nowrap;min-height:44px;display:flex;align-items:center}
/* Guide cards: one accessible link per card. */
.guide-group{margin-top:30px;scroll-margin-top:24px}
.group-heading{display:flex;align-items:center;gap:12px;border-bottom:1px solid var(--line);padding-bottom:13px;margin-bottom:18px}
.group-heading h2{font-size:1rem;letter-spacing:-.015em;margin:0}
.group-heading span{font-size:.75rem;color:var(--muted)}
.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.guide-group:has(.guide-card:nth-child(2):last-child) .cards{grid-template-columns:repeat(2,minmax(0,1fr))}
.guide-card{position:relative;display:flex;flex-direction:column;background:white;border:1px solid var(--line);border-radius:5px;padding:24px;min-width:0}
.guide-group .guide-card>.eyebrow{display:none}
.guide-card .eyebrow{font-size:.68rem;margin-bottom:12px}
.guide-card h3{font-size:1.13rem;line-height:1.4;margin-bottom:12px}
.guide-card h3 a{color:var(--ink);text-decoration:none}
.guide-card h3 a:after{content:"";position:absolute;inset:0;border-radius:5px;z-index:1}
.guide-card h3 a:focus-visible{outline:none}
.guide-card h3 a:focus-visible:after{outline:3px solid var(--focus);outline-offset:3px}
.guide-card:hover{border-color:#548b88}
.guide-card h3 a:hover{color:var(--accent)}
.guide-card>p:not(.eyebrow){font-size:.9rem;line-height:1.75;color:var(--muted);margin-bottom:20px}
.read-link{display:flex;justify-content:space-between;gap:15px;align-items:center;color:var(--accent);font-size:.8rem;font-weight:600;margin-top:auto;padding-top:14px;border-top:1px solid var(--soft-line)}
/* Library uses compact rows so topics can be compared without a wall of cards. */
.page-heading{padding:34px 0 8px;max-width:800px}
.page-heading h1{font-size:2.7rem}
.library-start{font-size:.9rem;margin-bottom:20px;color:var(--muted)}
.library-start a{font-weight:550}
.topic-links{display:flex;gap:9px;flex-wrap:wrap;padding:0 0 26px;border-bottom:1px solid var(--line);font-size:.84rem}
.topic-links a{padding:9px 13px;min-height:44px;display:flex;align-items:center;border:1px solid var(--line);border-radius:4px;background:white;text-decoration:none}
.topic-links a:hover{border-color:var(--accent)}
.guides-page .guide-group{display:grid;grid-template-columns:200px minmax(0,1fr);gap:36px;margin-top:30px}
.guides-page .group-heading{display:block;border:0;padding-top:21px}
.guides-page .group-heading h2{font-size:1.05rem;margin-bottom:9px}
.guides-page .cards{display:block}
.guides-page .guide-card{display:grid;grid-template-columns:1fr 1.25fr 24px;align-items:center;gap:24px;border:0;border-bottom:1px solid var(--line);border-radius:0;background:transparent;padding:22px 0}
.guides-page .guide-card:first-child{border-top:1px solid var(--line)}
.guides-page .guide-card:hover{background:var(--tint)}
.guides-page .guide-card h3{font-size:1.05rem;margin:0}
.guides-page .guide-card>p:not(.eyebrow){font-size:.875rem;line-height:1.7;margin:0}
.guides-page .read-link{font-size:0;padding:0;border:0;margin:0}
.guides-page .read-link span{font-size:1.1rem}
/* Article: title precedes contents in the document and on mobile. */
.breadcrumbs{display:flex;gap:8px;flex-wrap:wrap;font-size:.78rem;color:var(--muted);padding:22px 0 0;line-height:1.7}
.breadcrumbs a{color:var(--muted)}
.article-layout{display:grid;grid-template-columns:210px minmax(0,720px);gap:0 62px;align-items:start;padding:38px 0 60px}
.article-layout>.article-heading{grid-column:2;grid-row:1;min-width:0}
.article-heading{padding-bottom:27px;border-bottom:1px solid var(--line);margin-bottom:30px}
.article-heading h1{font-size:clamp(2rem,3.3vw,2.8rem)}
.article-heading .intro{font-size:1.1rem;line-height:1.8}
.byline{font-size:.82rem;color:var(--muted);margin:22px 0 0}
.byline span{padding:0 9px}
.contents{grid-column:1;grid-row:1/3;position:sticky;top:26px;margin-top:4px}
.article-contents summary{font-size:.76rem;font-weight:650;letter-spacing:.045em;color:var(--ink);list-style:none;display:flex;justify-content:space-between;align-items:center;min-height:44px;border-bottom:1px solid var(--line);margin-bottom:12px}
.article-contents summary::-webkit-details-marker{display:none}
.article-contents summary:after{content:"+";font-size:1.1rem;font-weight:400;color:var(--accent)}
.article-contents[open] summary:after{content:"−"}
.contents nav{display:flex;flex-direction:column;gap:3px}
.contents nav a{font-size:.83rem;line-height:1.5;color:var(--muted);text-decoration:none;padding:9px 0 9px 12px;border-left:2px solid var(--line)}
.contents nav a:hover,.contents nav a[aria-current]{color:var(--accent);border-left-color:var(--accent);background:var(--tint)}
.contents-note{font-size:.75rem;color:var(--muted);border-top:1px solid var(--line);padding-top:18px;margin-top:22px}
.prose{grid-column:2;grid-row:2;min-width:0;max-width:720px}
.prose section{margin-top:34px}
.prose>section:first-child{margin-top:0}
.prose h2{font-size:1.45rem;line-height:1.35;margin-bottom:16px;scroll-margin-top:24px}
.prose p,.prose li{font-size:1.035rem;line-height:1.85}
.prose ol,.prose ul{padding-left:25px}
.prose li{padding-left:5px;margin-bottom:15px}
.prose ul li{margin-bottom:10px}
.prose .note{border-left:3px solid var(--accent);background:var(--tint);padding:24px 27px;margin-top:34px}
.note h2{font-size:1.3rem}.note p{font-size:.95rem}.note>a{font-size:.9rem}
.standalone{margin:38px auto 65px}
.related{border-top:1px solid var(--line);padding-top:30px;padding-bottom:50px}
.related .cards{grid-template-columns:repeat(2,minmax(0,1fr))}
.related h2{font-size:1.6rem}
.copy-box{border:1px solid var(--line);background:#f5f8fa;border-radius:5px;margin:24px 0;overflow:hidden}
.copy-heading{display:flex;justify-content:space-between;align-items:center;gap:15px;padding:12px 18px;background:#e3ebf0;border-bottom:1px solid var(--line);font-size:.8rem}
.copy-heading>span{font-weight:600}
.copy-heading button{font-size:.8rem;padding:8px 13px;min-height:44px;border:1px solid var(--accent);border-radius:4px;color:var(--accent);background:white;flex-shrink:0}
.copy-heading button:hover{background:var(--accent);color:white}
pre{font:.85rem/1.8 ui-monospace,SFMono-Regular,Consolas,monospace;white-space:pre-wrap;overflow-wrap:anywhere;padding:22px;margin:0}
pre:focus-visible{outline-offset:-3px}
.prose .copy-status{font-size:.8rem;margin:0;padding:0 18px}
.prose .copy-status:not(:empty){padding:12px 18px;border-top:1px solid var(--line)}
/* Publisher resources have quieter visual weight than the guide library. */
.publisher-resources{margin-top:44px;border-top:1px solid var(--line)}
.free-tools{display:grid;grid-template-columns:1.15fr 1fr;gap:26px 55px;padding:32px 0}
.free-tools h2{font-size:1.65rem;max-width:460px}
.free-tools-intro>p:not(.eyebrow){font-size:.95rem;color:var(--muted);line-height:1.8}
.free-tools .button{background:transparent;color:var(--accent)}
.free-tools .button:hover{background:var(--tint)}
.free-tools-topics>div{display:flex;gap:18px;border-bottom:1px solid var(--line);padding:16px 0}
.free-tools-topics>div:first-child{padding-top:0}.free-tools-topics>div:last-child{border:0}
.tool-index{font:.75rem/1.8 ui-monospace,Consolas,monospace;color:var(--accent);padding-top:2px}
.free-tools-topics h3{font-size:1rem;margin-bottom:7px}
.free-tools-topics p{font-size:.875rem;color:var(--muted);margin:0}
.free-tools-note{grid-column:1/-1;font-size:.78rem;color:var(--muted);max-width:900px;margin:0}
.xen-panel{display:flex;gap:35px;align-items:center;justify-content:space-between;background:var(--tint);border:1px solid #bdd6d2;border-radius:5px;padding:28px 30px;margin:40px 0}
.publisher-resources .xen-panel{margin:0 0 40px}
.xen-panel h2{font-size:1.6rem;margin-bottom:12px}
.xen-panel p:last-child{max-width:660px;font-size:.95rem;color:var(--muted);margin:0}
.xen-panel .button{flex-shrink:0;background:white;color:var(--accent)}
.xen-panel .button:hover{background:#d4e6e2}
.site-footer{border-top:1px solid var(--line);padding:30px 0;background:#e3eaf0}
.footer-top{display:flex;align-items:center;gap:28px;margin-bottom:22px}
.footer-top .brand{margin-right:auto;font-size:1.4rem}
.footer-top p{margin:0}
.footer-top>a:not(.brand),.footer-top p{font-size:.82rem}
.footer-top>a{min-height:44px;display:flex;align-items:center}
.site-footer>.wrap>p{font-size:.78rem;max-width:920px;color:var(--muted);margin:0 0 8px}
.not-found{padding-top:65px;padding-bottom:95px}
.not-found>p:not(.eyebrow){max-width:560px;color:var(--muted)}
.text-link{margin-left:20px;font-size:.9rem}
@media(min-width:761px){.header-inner nav[hidden]{display:flex!important}}
@media(max-width:1050px){
 .publisher{display:none}.hero-copy{gap:0 32px}.hero h1{font-size:2.65rem}
 .start{gap:30px;grid-template-columns:1fr 1.8fr}
 .article-layout{grid-template-columns:180px minmax(0,1fr);column-gap:34px}
 .guides-page .guide-group{grid-template-columns:170px minmax(0,1fr);gap:24px}
 .guides-page .guide-card{grid-template-columns:1fr 1.1fr 20px;gap:18px}
 .xen-panel{align-items:start;flex-direction:column;gap:22px}
 .footer-top{flex-wrap:wrap;gap:12px 24px}.footer-top .brand{width:100%}
}
@media(max-width:760px){
 .wrap{width:calc(100% - 40px)}
 .header-inner{min-height:76px;gap:0;justify-content:space-between;padding:15px 0}
 .brand{font-size:1.6rem}.header-inner nav{width:100%;margin:14px 0 0;flex-direction:column;gap:3px;border-top:1px solid var(--line);padding-top:8px}
 .header-inner nav a{padding:10px 12px}.menu-toggle:not([hidden]){display:block}
 .hero{padding:30px 0}.hero-copy{display:block}.hero .eyebrow{font-size:.65rem;letter-spacing:.045em;margin-bottom:17px}
 .hero h1{font-size:clamp(2rem,8.2vw,2.6rem);margin-bottom:20px}.hero .intro{font-size:1rem;margin-bottom:17px}
 .hero-actions{gap:10px 18px}.hero-actions>a:not(.button){font-size:.85rem}
 .start{grid-template-columns:1fr;gap:22px;padding:23px 20px}.start h2{font-size:1.5rem}.start h2 br{display:none}.start>div>p:last-child{max-width:none}
 .start .eyebrow{margin-bottom:10px}.start li{gap:12px}.start h3{font-size:1rem}.start li p{font-size:.875rem}.start li>span:last-child{display:none}
 .home-topics{gap:3px 18px;padding:15px 0;margin-bottom:26px}.home-topics>span{width:100%}.home-topics a{min-height:44px}
 .section-intro{align-items:start;flex-direction:column;gap:6px}.section-intro h2{font-size:1.6rem}
 .cards,.guide-group:has(.guide-card:nth-child(2):last-child) .cards,.related .cards{grid-template-columns:1fr}
 .guide-card{padding:22px}.guide-card h3{font-size:1.13rem}.guide-card>p:not(.eyebrow){font-size:.92rem}.guide-group{margin-top:23px}
 .page-heading{padding-top:27px}.page-heading h1{font-size:2.3rem}.intro{font-size:1rem}
 .library-start{font-size:.875rem}.library-start a{display:block;margin-top:5px}
 .guides-page .guide-group{display:block;margin-top:26px}.guides-page .group-heading{padding:0;margin-bottom:15px;display:flex}.guides-page .group-heading h2{margin:0}
 .guides-page .guide-card{grid-template-columns:1fr 22px;gap:10px 15px;padding:20px 0}
 .guides-page .guide-card h3{grid-column:1;font-size:1.08rem}.guides-page .guide-card>p:not(.eyebrow){grid-column:1;font-size:.91rem}.guides-page .read-link{grid-column:2;grid-row:1/3}
 .breadcrumbs{font-size:.75rem;padding-top:18px;gap:5px 8px}
 .article-layout{display:flex;flex-direction:column;gap:0;padding-top:25px;padding-bottom:40px}
 .article-heading{margin-bottom:20px;padding-bottom:22px;width:100%}.article-heading h1{font-size:2rem;line-height:1.18}.article-heading .intro{font-size:1.025rem;line-height:1.75}.byline{margin-top:20px}
 .contents{position:static;width:100%;margin:0 0 26px}.contents-note{display:none}
 .article-contents{border:1px solid var(--line);background:white;border-radius:4px}
 .article-contents summary{padding:10px 15px;margin:0;min-height:48px;border:0;font-size:.85rem;letter-spacing:0}
 .article-contents[open] summary{border-bottom:1px solid var(--line)}
 .contents nav{padding:8px 13px 12px;gap:0}.contents nav a{min-height:44px;font-size:.875rem;padding:10px 8px}
 .prose{width:100%;max-width:none}.prose section{margin-top:29px}.prose h2{font-size:1.35rem}.prose p,.prose li{font-size:1rem;line-height:1.8}
 .standalone{margin:30px auto 45px}.related{padding-bottom:40px}
 .copy-heading{align-items:start;flex-direction:column;gap:10px;padding:13px 16px}pre{padding:17px;font-size:.81rem;line-height:1.8}
 .prose .note{padding:22px}.publisher-resources{margin-top:32px}.free-tools{grid-template-columns:1fr;gap:26px;padding:28px 0}
 .free-tools h2{font-size:1.5rem}.free-tools-note{grid-column:1}.xen-panel{padding:24px 22px;margin:30px 0}.xen-panel h2{font-size:1.5rem}
 .footer-top{align-items:start;flex-direction:column;gap:6px}.footer-top p{margin-bottom:5px}.site-footer{padding:25px 0}
 .not-found{padding-top:45px;padding-bottom:60px}.text-link{display:block;margin:20px 0 0}
}
@media print{
 .site-header,.site-footer,.contents,.related,.menu-toggle,.copy-heading button,.home-topics{display:none!important}
 .wrap{width:100%}.article-layout{display:block}.prose{max-width:none}body{background:white;color:black}a{color:inherit}.guide-card h3 a:after{display:none}
}