:root{
  --ink:#f2f6ff; --ink2:#d5deef;
  --paper:#0b1020; --paper2:#111831; --card:#131b33;
  --deep:#060a14; --deep2:#0d1428;
  --rule:#232e4a; --rule2:#35446a;
  --text:#b8c4da; --muted:#8493ad;
  --accent:#5b9dff; --accent-deep:#8dbcff; --accent-soft:#16244a;
  --btn-ink:#05101f; --btn-bg:#2a63d8; --btn-hover:#2f6fe4;
  --slate:#9ec4e8; --slate-soft:#142338;
  --green:#57c98d; --green-soft:#122b22; --amber:#e0aa4a; --amber-soft:#2b2312;
  --on-deep:#c6d2e6; --on-deep-muted:#8a97ad;
  --maxw:71rem; --readw:42.5rem; --r:10px;
  --sh-sm:0 1px 2px rgba(0,0,0,.30);
  --sh:0 6px 22px rgba(0,0,0,.42);
  --sh-lg:0 20px 50px rgba(0,0,0,.55);
  --sans:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --serif:"Iowan Old Style","Palatino Linotype",Palatino,"Book Antiqua",Georgia,ui-serif,serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--sans);color:var(--ink2);background:var(--paper);line-height:1.68;font-size:1.0625rem;-webkit-font-smoothing:antialiased;overflow-x:clip}
img{max-width:100%;display:block}
a{color:var(--accent-deep);text-underline-offset:2px}
a:hover{color:var(--accent)}
h1,h2,h3,h4{font-family:var(--serif);color:var(--ink);line-height:1.18;margin:0;font-weight:600}
hr{border:0;border-top:1px solid var(--rule);margin:2.4rem 0}
.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:1.25rem}
.skip{position:absolute;left:-9999px}
.skip:focus{left:1rem;top:1rem;background:var(--card);color:var(--ink);padding:.6rem 1rem;border-radius:8px;z-index:200}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;font-family:var(--sans);font-weight:600;text-decoration:none;border-radius:8px;cursor:pointer;border:1.5px solid transparent;transition:background .18s,border-color .18s,transform .1s}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--btn-bg);color:#fff;padding:.72rem 1.3rem}
.btn-primary:hover{background:var(--btn-hover);color:#fff}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--rule2);padding:.72rem 1.3rem}
.btn-ghost:hover{border-color:var(--ink);color:var(--ink)}
.btn-lg{padding:.95rem 2rem;font-size:1.05rem}

.site-head{position:sticky;top:0;z-index:100;background:rgba(11,16,32,.92);backdrop-filter:saturate(160%) blur(10px);border-bottom:1px solid var(--rule)}
.nav{display:flex;align-items:center;justify-content:space-between;height:4.25rem;gap:1rem}
.brand{display:inline-flex;align-items:center;text-decoration:none;line-height:0}.brand img{height:34px;width:auto;display:block}@media (max-width:520px){.brand img{height:29px}}.foot-brand .brand img{height:32px}

.nav-links{display:flex;align-items:center;gap:1.5rem;list-style:none;margin:0;padding:0}
.nav-links a{color:var(--ink);text-decoration:none;font-size:.93rem;font-weight:500}
.nav-links a:hover{color:#fff}
.nav .btn-primary{padding:.55rem 1.1rem;font-size:.92rem}
@media (max-width:880px){.nav-links{display:none}}

.page-wrap{padding-block:clamp(2rem,4.5vw,3.2rem)}
.crumbs{font-size:.83rem;color:var(--muted);margin:0 0 1.5rem;letter-spacing:.01em}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--accent-deep);text-decoration:underline}
.crumbs span{margin:0 .4rem;color:var(--rule2)}
.page-head{max-width:var(--readw);min-width:0;margin:0 0 2.4rem}
.page-head h1{font-size:clamp(2rem,4.2vw,2.85rem);letter-spacing:-.015em;text-wrap:balance}
.page-head .lede{font-size:1.16rem;color:var(--muted);line-height:1.6;margin:1.05rem 0 0}
.updated{font-size:.83rem;color:var(--muted);margin:1.2rem 0 0;font-variant-numeric:tabular-nums}

.prose{max-width:var(--readw);min-width:0;font-size:1.07rem;line-height:1.75;color:var(--text);overflow-wrap:anywhere}
.prose h2{font-size:1.52rem;margin:2.7rem 0 .55rem;letter-spacing:-.01em;text-wrap:balance}
.prose h3{font-size:1.16rem;margin:1.9rem 0 .35rem;font-family:var(--sans);font-weight:660;color:var(--ink)}
.prose p{margin:.8rem 0 1.1rem}
.prose ul,.prose ol{margin:.6rem 0 1.25rem;padding-left:1.3rem}
.prose li{margin:.45rem 0}
.prose li::marker{color:var(--accent)}
.prose strong{color:var(--ink);font-weight:650}
.prose blockquote{margin:1.4rem 0;padding:.2rem 0 .2rem 1.1rem;border-left:3px solid var(--accent);color:var(--ink2);font-family:var(--serif);font-size:1.1rem}
.prose code{font-family:var(--mono);background:var(--paper2);border:1px solid var(--rule);border-radius:5px;padding:.05rem .34rem;font-size:.9em}
.prose table{width:100%;border-collapse:collapse;margin:1.4rem 0;font-size:.96rem;min-width:30rem}
.prose th,.prose td{text-align:left;padding:.65rem .7rem;border-bottom:1px solid var(--rule)}
.prose th{font-weight:650;color:var(--ink);border-bottom:2px solid var(--rule2);font-size:.86rem;letter-spacing:.03em;text-transform:uppercase}

.srcs{font-size:.92rem;line-height:1.6}
.srcs li{margin:.6rem 0}
.note{background:var(--card);border:1px solid var(--rule);border-left:3px solid var(--slate);border-radius:var(--r);padding:1.1rem 1.25rem;margin:1.6rem 0}
.note.warn{border-left-color:var(--accent)}
.note p{margin:.4rem 0}
.note p:first-child{margin-top:0}
.note p:last-child{margin-bottom:0}
.note .lbl{display:block;font-size:.75rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--muted);margin-bottom:.35rem}

.byline{display:flex;align-items:center;flex-wrap:wrap;gap:.85rem;padding:1rem 0;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);margin:1.8rem 0 0;max-width:var(--readw)}
.byline .av{width:44px;height:44px;border-radius:50%;background:var(--slate-soft);flex:none;display:grid;place-items:center;font-family:var(--serif);font-size:1.05rem;color:var(--slate);font-weight:600}
.byline .who{font-size:.94rem;line-height:1.45}
.byline .who strong{color:var(--ink)}
.byline .who span{display:block;color:var(--muted);font-size:.86rem}

.site-foot{background:var(--deep);color:var(--on-deep);margin-top:4rem;padding:3rem 0 1.6rem;font-size:.93rem}
.site-foot a{color:var(--on-deep);text-decoration:none}
.site-foot a:hover{color:#fff;text-decoration:underline}
.foot-top{display:grid;grid-template-columns:minmax(0,1.7fr) repeat(4,minmax(0,1fr));gap:2rem}
.foot-brand .brand{margin-bottom:.9rem}
.foot-brand p{margin:0;color:var(--on-deep-muted);font-size:.9rem;line-height:1.6;max-width:22rem}
.foot-col h4{color:#fff;font-size:.8rem;letter-spacing:.09em;text-transform:uppercase;font-family:var(--sans);font-weight:700;margin:0 0 .8rem}
.foot-col ul{list-style:none;margin:0;padding:0}
.foot-col li{margin:.45rem 0}
.foot-bottom{display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap;border-top:1px solid rgba(255,255,255,.1);margin-top:2.4rem;padding-top:1.4rem;color:var(--on-deep-muted);font-size:.85rem}
@media (max-width:880px){.foot-top{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:1.6rem}.foot-brand{grid-column:1/-1}}
@media (max-width:520px){.foot-top{grid-template-columns:minmax(0,1fr)}}

.tbl-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:1.4rem 0;max-width:100%}
.prose img,.prose svg{max-width:100%;height:auto}
.prose pre,.prose code{overflow-wrap:anywhere}
@media (max-width:640px){
  .page-wrap{padding-block:1.6rem}
  .page-head{margin-bottom:1.6rem}
  .page-head h1{font-size:clamp(1.7rem,6.4vw,2.2rem)}
  .page-head .lede{font-size:1.02rem}
  .prose{font-size:1.02rem}
  .prose h2{font-size:1.3rem;margin-top:2.1rem}
  .cred li{grid-template-columns:minmax(0,1fr)}
  .site-foot{padding-top:2.2rem}
}