:root{--c:#1d4ed8;--cd:#1e3a8a;--s:#f1f5f9;--t:#1e293b;--m:#475569;--l:#cbd5e1;--r:20px}
*,*::before,*::after{box-sizing:border-box}
body{margin:0;font:1rem/1.65 system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--t);background:#fff;overflow-wrap:anywhere;hyphens:auto;counter-reset:step}
h1,h2,h3{font-family:Georgia,"Times New Roman",serif;line-height:1.2;margin:0 0 .6em;font-weight:700}
h1{font-size:clamp(2.1rem,7.5vw,4.5rem)}
h2{font-size:clamp(1.5rem,4vw,2.1rem)}
h3{font-size:1.2rem}
p,ul,ol,dl,pre{margin:0 0 1rem}
ul,ol{padding-left:1.4rem}
li{margin-bottom:.35rem}
a{color:var(--c);text-underline-offset:.2em}
[hidden]{display:none!important}
.vh{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip{position:absolute;left:1rem;top:-5rem;background:#fff;color:var(--c);padding:.75rem 1.25rem;border-radius:999px;z-index:50;font-weight:600}
.skip:focus{top:.5rem}
:focus-visible{outline:3px solid var(--c);outline-offset:3px}
.hero :focus-visible,.band-c :focus-visible,.site-footer :focus-visible{outline-color:#fff}
.wrap{max-width:1100px;margin:0 auto;padding:0 1rem}
.site-header{background:#fff;border-bottom:1px solid var(--l)}
.head{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.5rem;padding-top:.6rem;padding-bottom:.6rem}
.brand{display:flex;align-items:center;gap:.6rem;min-width:0;flex:1;color:var(--t);text-decoration:none}
.brand span{font:700 1rem/1.25 Georgia,"Times New Roman",serif;min-width:0}
.logo{width:36px;height:36px;flex:none}
.menu-toggle{display:none;min-height:44px;padding:0 1.2rem;border-radius:999px;border:0;background:var(--c);color:#fff;font:inherit;font-weight:600;cursor:pointer;flex:none}
.js .menu-toggle{display:inline-flex;align-items:center}
.site-nav{width:100%;max-height:calc(100vh - 5rem);overflow-y:auto}
.site-nav ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.25rem}
.site-nav li{margin:0}
.site-nav a:not(.btn){display:flex;align-items:center;min-height:44px;padding:0 .5rem;color:var(--t);text-decoration:none;font-weight:600}
.site-nav a:not(.btn):hover{color:var(--c);text-decoration:underline}
.site-nav a[aria-current]{color:var(--c);text-decoration:underline}
.site-nav .btn{width:100%}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:.55rem 1.4rem;border:0;border-radius:999px;background:var(--c);color:#fff;font:inherit;font-weight:600;text-decoration:none;cursor:pointer;text-align:center}
.btn:hover{background:var(--cd)}
.btn-alt{background:var(--t)}
.btn-alt:hover{background:#0f172a}
.actions{display:flex;flex-wrap:wrap;gap:.75rem;margin:1rem 0}
@media(min-width:900px){
.head{flex-direction:column;justify-content:center;padding-top:1rem;padding-bottom:1rem;gap:.6rem}
.brand{flex:none;justify-content:center}
.js .menu-toggle{display:none}
.site-nav{width:auto;max-height:none;overflow:visible}
.site-nav ul{flex-direction:row;align-items:center;justify-content:center;gap:.4rem;flex-wrap:wrap}
.site-nav a:not(.btn){padding:0 .9rem}
.site-nav .btn{width:auto}
}
.hero{background:var(--c);color:#fff}
.hero .wrap{padding-top:3rem;padding-bottom:3rem}
.hero h1{margin-bottom:.5em}
.hero.small h1{font-size:clamp(1.9rem,5.5vw,3.2rem)}
.hero a{color:#fff}
.lead{font-size:1.15rem;max-width:48rem;margin:0}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:.4rem;padding:0;margin:0 0 1.2rem;font-size:.95rem}
.crumbs li{margin:0}
.crumbs li+li::before{content:"›";margin-right:.4rem}
.band-c{background:var(--c);color:#fff}
.band-c a{color:#fff}
.band-s{background:var(--s)}
.band-top{border-top:6px solid var(--c)}
.sec{padding:2.5rem 0}
.step .wrap{position:relative;padding:3rem 1rem 3rem 4rem}
.step .wrap::before{content:"";position:absolute;left:1.9rem;top:0;bottom:0;width:2px;background:var(--l)}
.band-c .wrap::before{background:rgba(255,255,255,.5)}
.step{counter-increment:step}
.step h2{position:relative}
.step h2::before{content:counter(step);position:absolute;left:-3.2rem;top:-.1rem;width:2.2rem;height:2.2rem;border-radius:50%;background:var(--c);color:#fff;display:grid;place-items:center;font:700 .95rem/1 system-ui,sans-serif}
.band-c h2::before{background:#fff;color:var(--c)}
.prose{max-width:46rem}
.read{max-width:720px}
.grid{display:grid;gap:1.75rem 1.25rem;grid-template-columns:repeat(auto-fit,minmax(min(100%,17rem),1fr));margin-top:1.5rem}
.grid>*,.split>*{min-width:0}
.card{position:relative;background:#fff;border:1px solid var(--l);border-radius:var(--r);padding:1.7rem 1.25rem 1.25rem}
.band-s .card{background:#fff}
.badge{position:absolute;top:-.8rem;left:1.1rem;background:var(--c);color:#fff;border-radius:999px;padding:.15rem .85rem;font-size:.875rem;font-weight:600}
.card h2,.card h3{margin-bottom:.4em}
.file{margin-top:2rem}
.file h2{font-size:1.6rem}
.file h3{margin-top:1.2rem;font-size:1.05rem;font-family:system-ui,sans-serif;text-transform:uppercase;letter-spacing:.04em;color:var(--m)}
.meta,.note,.small{color:var(--m);font-size:.95rem}
.band-c .note,.band-c .small{color:#e2e8f0}
.inline{list-style:none;padding:0;display:flex;flex-wrap:wrap;gap:.4rem}
.inline li{background:var(--s);border-radius:999px;padding:.1rem .8rem;margin:0;font-size:.95rem}
.callout{background:var(--s);border-left:4px solid var(--c);border-radius:0 12px 12px 0;padding:.7rem 1rem;margin:0 0 1rem}
.split{display:grid;gap:1.5rem;margin-top:1rem}
@media(min-width:900px){.split{grid-template-columns:minmax(0,1fr) 17rem}}
.tw{overflow-x:auto;background:#fff;border:1px solid var(--l);border-radius:var(--r)}
table{border-collapse:collapse;width:100%;min-width:40rem}
caption{text-align:left;padding:.9rem;font-weight:700}
th,td{padding:.75rem .9rem;text-align:left;border-top:1px solid var(--l);vertical-align:top}
thead th{background:var(--s)}
.sample{white-space:pre-wrap;background:var(--s);border-left:4px solid var(--c);border-radius:0 var(--r) var(--r) 0;padding:1rem 1.25rem;font:inherit}
.lines{list-style:none;padding:0}
.lines li{padding:.55rem 0;border-bottom:1px solid var(--l);margin:0}
.band-c .lines li{border-color:rgba(255,255,255,.4)}
fieldset{border:1px solid var(--l);border-radius:var(--r);padding:1rem 1.25rem;margin:0 0 1.25rem;min-width:0}
fieldset.bad{border-color:#b91c1c}
legend{font-weight:700;padding:0 .4rem}
.opt{display:flex;gap:.6rem;align-items:flex-start;min-height:44px;padding:.4rem 0}
input[type=radio],input[type=checkbox]{width:1.25rem;height:1.25rem;margin:.2rem 0 0;accent-color:var(--c);flex:none}
label.f{display:block;font-weight:700;margin-bottom:.35rem}
input[type=text],select,textarea{display:block;width:100%;min-height:44px;padding:.6rem .8rem;border:1px solid #64748b;border-radius:12px;font:inherit;color:var(--t);background:#fff}
textarea{resize:vertical}
textarea[readonly]{background:var(--s)}
[aria-invalid=true]{border-color:#b91c1c}
.field{margin-bottom:1.25rem}
.hint{color:var(--m);font-size:.95rem;margin:.3rem 0 0}
.err{color:#b91c1c;font-weight:600;margin:.4rem 0 0}
.err:empty{display:none}
.local{background:var(--s);border-radius:var(--r);padding:.8rem 1.1rem;font-weight:600;margin-bottom:1.25rem}
details{border:1px solid var(--l);border-radius:var(--r);margin:0 0 .8rem;background:#fff}
summary{cursor:pointer;min-height:44px;padding:.7rem 1.25rem;font-weight:700}
details>div{padding:0 1.25rem 1rem}
details[open]{border-color:var(--c)}
.toc{background:var(--s);border-radius:var(--r);padding:1rem 1.5rem 1rem 2.6rem;margin:0 0 2rem}
.toc a{display:inline-flex;align-items:center;min-height:44px}
.toc li{margin:0}
.read h2{margin-top:2.2rem}
.status{position:fixed;left:1rem;right:1rem;bottom:1rem;max-width:24rem;margin:0 auto;background:var(--t);color:#fff;padding:.8rem 1.2rem;border-radius:999px;text-align:center;z-index:40;pointer-events:none}
.status:empty{opacity:0;padding:0}
.site-footer{background:var(--t);color:#e2e8f0;padding:2.5rem 0 5rem;margin-top:0}
.site-footer a{color:#fff}
.site-footer ul{list-style:none;padding:0;display:flex;flex-wrap:wrap;gap:0 1.2rem;margin:0 0 1rem}
.site-footer li{margin:0}
.site-footer ul a{display:inline-flex;align-items:center;min-height:44px}
.site-footer .legal{font-size:.95rem;color:#cbd5e1}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}