:root {
  color-scheme: dark;
  --bg:#17131d; --surface:#211b29; --lift:#292131; --line:#403348;
  --text:#f5eef9; --soft:#c8bdcf; --muted:#ac9db5; --violet:#d5b4ee;
  --aqua:#a9dfd7; --header:74px; --side:244px;
  font-family:Arial,Helvetica,sans-serif; color:var(--text); background:var(--bg);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header) + 22px)}
body{margin:0;line-height:1.55}
a{color:inherit;text-decoration:none}
button,input,summary{font:inherit}
button,summary{cursor:pointer}
button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible{outline:2px solid var(--aqua);outline-offset:3px}
button{color:inherit}
.icon{display:inline-block;width:20px;height:20px;flex:none;vertical-align:middle}
.skip{position:fixed;z-index:7;top:8px;left:12px;transform:translateY(-150%);background:var(--aqua);color:#14231f;padding:8px 16px;border-radius:4px}
.skip:focus{transform:none}
.mast{position:sticky;top:0;z-index:4;border-bottom:1px solid var(--line);background:#19151f}
.mast-inner{max-width:1620px;min-height:var(--header);margin:auto;padding:0 34px;display:flex;gap:36px;align-items:center}
.brand{display:inline-flex;align-items:center;gap:11px;flex:none}
.brand img{width:28px;height:42px}
.brand span{display:grid;gap:2px}
.brand strong{font-size:17px;letter-spacing:3px;line-height:1.15}
.brand small{font-size:9px;font-weight:bold;letter-spacing:2.1px;color:var(--violet);line-height:1.3}
.outside{display:flex;gap:26px;margin-left:auto}
.outside a{display:inline-flex;gap:5px;align-items:center;font-size:13px;color:var(--soft)}
.outside a:hover,.crumb a:hover,.quiet-link:hover{color:var(--aqua)}
.outside .icon{width:13px;height:13px}
.open-search{display:flex;align-items:center;gap:10px;width:min(250px,23vw);min-height:39px;border:1px solid #584663;border-radius:7px;background:#251d2d;color:var(--soft);padding:0 11px;font-size:13px;text-align:left}
.open-search:hover,.close-search:hover{border-color:var(--violet)}
.open-search .icon{width:17px;height:17px;color:var(--violet)}
kbd{font:10px Arial,sans-serif;border:1px solid var(--line);border-radius:4px;padding:2px 4px;color:var(--muted);margin-left:auto}
.shell{display:grid;grid-template-columns:var(--side) minmax(0,1fr);max-width:1620px;margin:auto;align-items:start}
.sidebar{height:calc(100vh - var(--header));position:sticky;top:var(--header);min-width:0;overflow-y:auto;border-right:1px solid var(--line);scrollbar-color:#51405b transparent;scrollbar-width:thin}
.sidebar-inner{padding:29px 15px 40px 21px}
.nav-home,.nav-group h2{display:flex;align-items:center;gap:10px}
.nav-home{padding:9px 12px;border-radius:6px;font-size:13px;font-weight:bold;color:var(--soft)}
.nav-home .icon,.nav-group .icon{width:17px;height:17px;color:var(--violet)}
.nav-group{margin:27px 0 0}
.nav-group h2{padding:0 12px;font-size:12px;color:var(--soft);margin:0 0 8px}
.nav-group ul,.guide-group ul,.toc ol,.mobile-toc ol,.results{list-style:none;margin:0;padding:0}
.nav-group li{margin:2px 0}
.nav-group li a{display:block;margin-left:19px;padding:6px 10px 6px 15px;border-left:1px solid var(--line);font-size:12.5px;color:var(--muted);line-height:1.5}
.nav-group li a:hover,.nav-home:hover{background:#282031;color:var(--text)}
.nav-group a.selected,.nav-home.selected{background:#34293e;color:#ebd7fa}
.nav-group a.selected{border-left:2px solid var(--violet);padding-left:14px}
main{min-width:0;padding:37px clamp(22px,4vw,70px) 62px}
main:focus{outline:0}
.hero{position:relative;isolation:isolate;display:flex;align-items:flex-end;min-height:clamp(290px,26vw,405px);overflow:hidden;border:1px solid #534459;border-radius:12px;background:#242035}
.hero:before,.hero:after{content:"";position:absolute;inset:0;z-index:-1}
.hero:before{background:url("fortress.webp") center 56%/cover no-repeat}
.hero:after{background:linear-gradient(90deg,rgba(25,18,37,.97) 0%,rgba(31,22,42,.86) 34%,rgba(32,24,46,.4) 65%,rgba(21,20,34,.08) 100%),linear-gradient(0deg,rgba(21,17,29,.57),transparent 65%)}
.hero-copy{padding:clamp(25px,3.6vw,56px);max-width:670px}
h1,h2,h3,h4,p{margin-top:0}
.hero h1,.article-heading h1{margin:0;color:#fffaff;font-weight:740;letter-spacing:-.052em;line-height:1.03;text-wrap:balance}
.hero h1{font-size:clamp(43px,5.3vw,82px);max-width:10.9em}
.hero-copy>p{max-width:410px;margin:16px 0 0;color:#e4dcea;font-size:clamp(15px,1.25vw,19px);line-height:1.55;text-wrap:pretty}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:14px 22px;margin:24px 0 0}
.primary-link,.quiet-link{display:inline-flex;align-items:center;justify-content:center;gap:10px;font-weight:700;font-size:13px;min-height:40px}
.primary-link{color:#24182c;background:#d6b7ed;border-radius:6px;padding:8px 15px}
.primary-link:hover{background:#e8cef8}
.primary-link .icon,.quiet-link .icon{width:15px;height:15px}
.library{margin-top:36px}
.library>h2{font-size:clamp(25px,2.45vw,37px);letter-spacing:-.035em;line-height:1.15;margin:0 0 19px}
.guide-groups{display:grid;gap:20px}
.guide-groups.two{grid-template-columns:repeat(2,minmax(0,1fr))}
.guide-group{border:1px solid var(--line);border-radius:9px;background:#201a27;min-width:0}
.guide-group>header{padding:18px 21px;display:flex;align-items:center;gap:12px;border-bottom:1px solid var(--line);background:#251d2d;border-radius:9px 9px 0 0}
.group-icon{width:36px;height:36px;display:grid;place-items:center;color:var(--violet);border:1px solid #554262;border-radius:7px;background:#302338}
.guide-group:nth-child(2) .group-icon{color:var(--aqua);border-color:#394e4a;background:#22332f}
.guide-group h3{margin:0;font-size:17px;letter-spacing:-.02em}
.guide-group li+li{border-top:1px solid #392e40}
.guide-group li a{display:flex;justify-content:space-between;align-items:center;gap:15px;padding:15px 21px}
.guide-group li a:hover{background:#302636}
.guide-group li:last-child a{border-radius:0 0 9px 9px}
.guide-group h4{margin:0 0 3px;font-size:15px;line-height:1.4}
.guide-group p{color:var(--soft);margin:0;font-size:13px;line-height:1.5}
.guide-group li .icon{width:14px;height:14px;color:var(--muted)}
.shell:has(.toc){grid-template-columns:var(--side) minmax(0,1fr) 218px}
.reader{max-width:930px;width:100%;justify-self:center;padding-top:31px;padding-left:clamp(24px,4vw,66px);padding-right:clamp(24px,4vw,66px)}
.crumb{display:flex;align-items:center;gap:9px;color:var(--muted);font-size:12px;line-height:1.5;margin-bottom:26px}
.crumb .icon{width:12px;height:12px}
.crumb span{color:var(--soft)}
.article-heading{border-bottom:1px solid var(--line);padding-bottom:29px}
.article-heading h1{font-size:clamp(38px,3.8vw,66px)}
.article-heading p{color:var(--soft);margin:15px 0 0;max-width:67ch;font-size:clamp(16px,1.22vw,19px)}
.article-body{color:#dfd5e5;line-height:1.72;overflow-wrap:anywhere;font-size:15.5px}
.article-body section{margin:34px 0}
.article-body h2{color:var(--text);line-height:1.22;font-size:clamp(22px,2vw,31px);letter-spacing:-.035em;margin-bottom:12px}
.article-body p,.article-body ol,.article-body ul,.article-body table,.article-body figure{margin:0 0 15px}
.article-body strong{color:#f6edf8}
.article-body ul,.article-body ol{padding-left:24px}
.article-body li{padding-left:3px;margin:6px 0}
.article-body li::marker{color:var(--violet);font-weight:bold}
.article-body a{color:var(--aqua);text-decoration:underline;text-underline-offset:3px}
.article-body code{background:#332638;border:1px solid #4d3858;color:#f2d8ff;padding:1px 5px;border-radius:4px;font-family:Consolas,monospace;font-size:.91em}
.table-scroll{overflow-x:auto}
.article-body table{border-collapse:collapse;width:100%;font-size:14px;line-height:1.5;background:#211a27}
.article-body td,.article-body th{padding:10px 12px;border:1px solid var(--line);text-align:left;vertical-align:top;overflow-wrap:normal}
.article-body thead{background:#2d2234;color:#ead7f1}
.article-body th{color:var(--text)}
.article-body figure{padding:9px;background:#211b29;border:1px solid var(--line);border-radius:9px}
.article-body figure img{width:100%;height:auto;display:block;border-radius:4px}
.article-body figcaption{font-size:12px;line-height:1.55;color:var(--muted);padding:8px 4px 0}
.toc{min-width:0;position:sticky;top:var(--header);padding:37px 22px 30px 0;font-size:12.5px}
.toc h2{font-size:12px;margin:0 0 12px;color:var(--text)}
.toc a,.mobile-toc a{display:block;border-left:1px solid var(--line);padding:5px 10px;color:var(--muted);line-height:1.5}
.toc a:hover,.toc a[aria-current="location"],.mobile-toc a:hover{color:var(--violet);border-left-color:var(--violet)}
.page-turn{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:35px;border-top:1px solid var(--line);padding-top:20px}
.page-turn a{display:flex;align-items:center;gap:10px;padding:12px;border:1px solid var(--line);border-radius:7px;min-width:0}
.page-turn a:last-child{flex-direction:row-reverse;text-align:right}
.page-turn a:hover{border-color:#80698a;background:#261d2d}
.page-turn small,.page-turn strong{display:block;line-height:1.45}
.page-turn small{color:var(--muted);font-size:11px}
.page-turn strong{font-size:13px}
.page-turn .icon{width:16px;color:var(--violet)}
.mobile-nav,.mobile-toc{display:none}
#search-dialog{color:var(--text);background:#231c2a;width:min(575px,calc(100% - 26px));max-height:min(82vh,680px);border:1px solid #665271;border-radius:11px;box-shadow:0 22px 80px #09060cd9;padding:20px 23px 10px}
#search-dialog::backdrop{background:#0e0b13bd;backdrop-filter:blur(5px)}
.search-top,.search-input{display:flex;align-items:center;gap:12px}
.search-top{justify-content:space-between;margin-bottom:14px}
.search-top h2{margin:0;font-size:20px;letter-spacing:-.025em}
.close-search{width:33px;height:33px;display:grid;place-items:center;background:transparent;border:1px solid var(--line);border-radius:5px}
.close-search .icon{width:16px}
.search-input{background:#17131d;border:1px solid #80668d;border-radius:6px;padding:0 12px;color:var(--violet)}
.search-input:focus-within{border-color:var(--aqua)}
.search-input input{min-width:0;color:var(--text);width:100%;height:43px;background:transparent;border:0;outline:0}
.search-status{margin:13px 0 9px;color:var(--muted);font-size:12px}
.results li{border-top:1px solid var(--line)}
.results a{display:block;padding:10px 4px}
.results a:hover,.results a:focus-visible{background:#32273b}
.results small,.results strong,.results span{display:block}
.results small{color:var(--aqua);font-size:10px}
.results strong{color:var(--text);font-size:15px}
.results span{color:var(--soft);font-size:12px}
@media(max-width:1160px){
  :root{--side:211px}.shell:has(.toc){grid-template-columns:var(--side) minmax(0,1fr)}
  .toc{display:none}.mobile-toc{display:block;margin:18px 0}
  .mobile-toc summary,.mobile-nav summary{color:var(--violet);font-weight:700;font-size:13px}
  .mobile-toc ol{margin:8px 0 0}.mobile-toc a{font-size:13px}
  .guide-group li a,.guide-group>header{padding-left:15px;padding-right:15px}
}
@media(max-width:860px){
  :root{--header:65px}
  .shell,.shell:has(.toc){display:block}
  .sidebar{display:none}
  .mobile-nav{display:block;border-bottom:1px solid var(--line);padding:0 22px;background:#1c1722}
  .mobile-nav summary{list-style:none;display:flex;gap:8px;align-items:center;width:fit-content;min-height:41px}
  .mobile-nav summary::-webkit-details-marker{display:none}
  .mobile-nav summary .icon{width:16px;height:16px}
  .mobile-nav nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 18px;padding:0 0 15px}
  .mobile-nav .nav-home{grid-column:1/-1}.mobile-nav .nav-group{margin:0}
  .mast-inner{padding:0 22px;gap:20px}
  .open-search{width:auto}.open-search kbd{display:none}
  main,.reader{padding:24px 22px 50px}
}
@media(max-width:600px){
  :root{--header:62px}
  .mast-inner{padding:0 15px;gap:14px}.brand{gap:7px}.brand img{width:23px;height:34px}.brand strong{font-size:14px}.brand small{font-size:8px}
  .outside{gap:14px}.outside a{font-size:11px}.outside .icon{width:10px;height:10px}
  .open-search{width:37px;height:37px;min-height:37px;justify-content:center;padding:0}.open-search span{display:none}
  .mobile-nav{padding:0 15px}.mobile-nav nav{grid-template-columns:1fr}
  main,.reader{padding:16px 15px 42px}
  .hero{min-height:285px}.hero-copy{padding:24px 20px}.hero h1{font-size:44px}.hero-copy>p{font-size:15px}
  .hero:after{background:linear-gradient(90deg,#1d172be0,#1c172aa9),linear-gradient(0deg,#1a1523b8,transparent)}
  .hero-actions{gap:8px 13px;margin-top:18px}.primary-link,.quiet-link{font-size:12px}
  .guide-groups.two{grid-template-columns:1fr}
  .library{margin-top:25px}.library>h2{font-size:26px}
  .crumb{margin-bottom:20px}.article-heading{padding-bottom:20px}.article-heading h1{font-size:38px}
  .article-body{font-size:15px}.article-body td,.article-body th{padding:8px 7px;font-size:12px}
  .page-turn{gap:6px}.page-turn a{padding:8px;gap:6px}.page-turn strong{font-size:12px}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media print{.mast,.sidebar,.toc,.mobile-toc,.mobile-nav,.page-turn,.skip,.outside,.hero-actions,dialog{display:none!important}.shell,.shell:has(.toc){display:block}.reader{max-width:100%;padding:0}body,main,.article-body,.article-heading h1,.article-body h2,.article-body strong{color:#17131d;background:#fff}.article-heading p,.crumb span,.crumb a{color:#37303b}.article-body figure{break-inside:avoid}}