:root{
  --bg:222 47% 5%; --fg:210 40% 98%; --card:222 47% 8%; --muted:222 30% 18%;
  --muted-fg:215 20% 60%; --border:222 30% 18%; --primary:186 100% 50%;
  --primary-fg:222 47% 5%; --radius:.75rem;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:hsl(var(--bg));color:hsl(var(--fg));
  font-family:'DM Sans',system-ui,-apple-system,sans-serif;
  font-size:17px;line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:hsl(var(--primary));text-decoration:none}
a:hover{text-decoration:underline}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.narrow{max-width:760px}
.shell{max-width:1120px}
.hero-in{max-width:768px}

/* header */
.hdr{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);
  background:hsl(222 47% 6% / .82);border-bottom:1px solid hsl(var(--border))}
.hdr-in{display:flex;align-items:center;gap:clamp(10px,2vw,26px);height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:hsl(var(--fg));
  font-size:16px;white-space:nowrap;flex-shrink:0}
.brand:hover{text-decoration:none}
.dot{width:22px;height:22px;border-radius:50%;flex-shrink:0;
  background:radial-gradient(circle at 32% 30%,hsl(186 100% 62%),hsl(199 90% 42%))}
.nav{display:flex;gap:clamp(8px,1.4vw,20px);margin-left:auto;align-items:center;min-width:0}
.nav a{color:hsl(var(--muted-fg));font-size:14.5px;font-weight:500;white-space:nowrap}
.nav a:hover{color:hsl(var(--fg));text-decoration:none}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:hsl(var(--primary));color:hsl(var(--primary-fg));font-weight:700;
  padding:10px 18px;border-radius:999px;font-size:14.5px;white-space:nowrap;border:0;cursor:pointer}
.btn:hover{text-decoration:none;filter:brightness(1.08)}
.btn-ghost{background:transparent;color:hsl(var(--fg));border:1px solid hsl(var(--border))}
.burger{display:none;margin-left:auto;background:none;border:1px solid hsl(var(--border));
  color:hsl(var(--fg));border-radius:10px;padding:8px 11px;font-size:16px;cursor:pointer}
@media(max-width:900px){
  .nav{position:fixed;inset:64px 0 auto 0;flex-direction:column;align-items:stretch;
    background:hsl(222 47% 7%);border-bottom:1px solid hsl(var(--border));
    padding:14px 24px 22px;gap:2px;display:none}
  .nav.open{display:flex}
  .nav a{padding:12px 2px;font-size:16px;border-bottom:1px solid hsl(var(--border) / .5)}
  .nav .btn{margin-top:12px;padding:13px 18px}
  .burger{display:block}
}

/* hero */
.hero{position:relative;padding:44px 0 8px;overflow:hidden}
.hero::before{content:"";position:absolute;top:-220px;right:-140px;width:620px;height:620px;
  background:radial-gradient(circle,hsl(var(--primary) / .13),transparent 66%);
  border-radius:50%;filter:blur(46px);pointer-events:none}
.crumbs{font-size:13.5px;color:hsl(var(--muted-fg));margin-bottom:20px}
.crumbs a{color:hsl(var(--muted-fg))}
.crumbs a:hover{color:hsl(var(--primary))}
.pill{display:inline-block;font-size:11.5px;font-weight:700;letter-spacing:.11em;
  text-transform:uppercase;color:hsl(var(--primary));background:hsl(var(--primary) / .1);
  border:1px solid hsl(var(--primary) / .3);padding:6px 14px;border-radius:999px}
h1{font-size:clamp(30px,5.1vw,50px);line-height:1.12;letter-spacing:-.021em;
  margin:20px 0 16px;font-weight:700}
.lede{font-size:clamp(17px,2.1vw,20px);color:hsl(var(--muted-fg));margin:0 0 26px;line-height:1.6}
.meta{display:flex;flex-wrap:wrap;align-items:center;gap:9px 16px;font-size:14px;
  color:hsl(var(--muted-fg));margin-bottom:30px}
.meta .who{display:flex;align-items:center;gap:9px;color:hsl(var(--fg));font-weight:600}
.avatar{width:30px;height:30px;border-radius:50%;
  background:radial-gradient(circle at 32% 30%,hsl(186 100% 62%),hsl(199 90% 40%))}
.sep{opacity:.4}
.cover{border-radius:16px;border:1px solid hsl(var(--border));overflow:hidden;margin-bottom:38px;
  box-shadow:0 24px 60px -28px hsl(186 100% 50% / .22)}

/* layout */
.cols{display:grid;grid-template-columns:minmax(0,772px) 272px;gap:56px;align-items:start;
  padding-bottom:64px;justify-content:start}
@media(max-width:1120px){.cols{grid-template-columns:minmax(0,1fr) 262px;gap:40px}}
@media(max-width:1000px){.cols{grid-template-columns:minmax(0,1fr);gap:34px;max-width:772px}}
.toc{position:sticky;top:88px;border:1px solid hsl(var(--border));border-radius:var(--radius);
  padding:20px 20px 16px;background:hsl(var(--card))}
@media(max-width:1000px){.toc{position:static}}
.toc h2{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:hsl(var(--muted-fg));
  margin:0 0 12px;font-weight:700}
.toc ol{list-style:none;margin:0;padding:0;counter-reset:t}
.toc li{counter-increment:t;margin:0 0 3px}
.toc a{display:block;font-size:14px;color:hsl(var(--muted-fg));padding:6px 0 6px 26px;
  position:relative;line-height:1.42}
.toc a::before{content:counter(t);position:absolute;left:0;top:6px;font-size:11.5px;
  font-weight:700;color:hsl(var(--primary) / .65);font-variant-numeric:tabular-nums}
.toc a:hover{color:hsl(var(--fg));text-decoration:none}

/* article */
.art{min-width:0;font-size:17.5px}
.art h2{font-size:clamp(23px,3.1vw,30px);line-height:1.25;letter-spacing:-.014em;
  margin:52px 0 18px;font-weight:700;scroll-margin-top:84px}
.art h3{font-size:20px;margin:34px 0 12px;font-weight:700}
.art p{margin:0 0 20px;color:hsl(210 30% 88%)}
.art ul,.art ol{margin:0 0 22px;padding-left:22px;color:hsl(210 30% 88%)}
.art li{margin-bottom:11px}
.art li::marker{color:hsl(var(--primary) / .8)}
.art strong{color:hsl(var(--fg))}
.tw{overflow-x:auto;margin:0 0 26px;border:1px solid hsl(var(--border));
  border-radius:var(--radius);background:hsl(var(--card))}
table{border-collapse:collapse;width:100%;font-size:15px;min-width:460px}
th,td{text-align:left;padding:13px 16px;border-bottom:1px solid hsl(var(--border));
  vertical-align:top;line-height:1.5}
th{font-weight:700;color:hsl(var(--fg));background:hsl(222 40% 11%);white-space:nowrap;
  font-size:13px;letter-spacing:.04em;text-transform:uppercase}
td{color:hsl(210 26% 82%)}
tr:last-child td{border-bottom:0}
.note{border-left:3px solid hsl(var(--primary));background:hsl(var(--primary) / .07);
  border-radius:0 var(--radius) var(--radius) 0;padding:16px 20px;margin:0 0 26px;
  color:hsl(210 32% 88%);font-size:16.5px}
.note p{margin:0}
.key{border:1px solid hsl(var(--primary) / .28);background:hsl(var(--primary) / .05);
  border-radius:var(--radius);padding:22px 26px;margin:0 0 38px}
.key h2{font-size:13px!important;letter-spacing:.12em;text-transform:uppercase;
  color:hsl(var(--primary));margin:0 0 14px!important;font-weight:700}
.key ul{margin:0;padding-left:20px}
.key li{margin-bottom:9px;color:hsl(210 32% 88%)}

/* faq */
details{border:1px solid hsl(var(--border));border-radius:var(--radius);
  background:hsl(var(--card));margin-bottom:12px;overflow:hidden}
summary{cursor:pointer;padding:17px 22px;font-weight:600;font-size:16.5px;list-style:none;
  display:flex;justify-content:space-between;gap:16px;align-items:center}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";color:hsl(var(--primary));font-size:22px;font-weight:400;
  line-height:1;flex-shrink:0}
details[open] summary::after{content:"\2212"}
details p{margin:0;padding:0 22px 20px;color:hsl(210 28% 84%);font-size:16.5px}

/* cta */
.cta{border:1px solid hsl(var(--primary) / .26);border-radius:18px;padding:38px 34px;
  margin:56px 0 0;text-align:center;position:relative;overflow:hidden;
  background:linear-gradient(160deg,hsl(var(--primary) / .1),hsl(222 47% 8%) 62%)}
.cta h2{margin:0 0 10px!important;font-size:clamp(22px,3vw,29px)!important}
.cta p{color:hsl(var(--muted-fg));margin:0 auto 24px;max-width:520px}
.cta-row{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* cards */
.sec-h{font-size:22px;font-weight:700;margin:64px 0 22px}
.grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fill,minmax(272px,1fr))}
.card{border:1px solid hsl(var(--border));border-radius:var(--radius);overflow:hidden;
  background:hsl(var(--card));display:flex;flex-direction:column;transition:.2s}
.card:hover{border-color:hsl(var(--primary) / .45);transform:translateY(-3px)}
.card a.thumb{display:block;aspect-ratio:1200/340;background:hsl(222 40% 10%);overflow:hidden}
.card img{width:100%;height:100%;object-fit:cover}
.card-b{padding:16px 18px 18px;display:flex;flex-direction:column;gap:9px;flex:1}
.card h3{margin:0;font-size:16.5px;line-height:1.36;font-weight:700}
.card h3 a{color:hsl(var(--fg))}
.card h3 a:hover{color:hsl(var(--primary));text-decoration:none}
.card p{margin:0;font-size:14px;color:hsl(var(--muted-fg));line-height:1.55}
.card .cm{margin-top:auto;padding-top:4px;font-size:12.5px;color:hsl(var(--muted-fg));
  display:flex;gap:8px;align-items:center}
.tag{font-size:11px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;
  color:hsl(var(--primary))}

/* index controls */
.filters{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 26px}
.chip{border:1px solid hsl(var(--border));background:hsl(var(--card));color:hsl(var(--muted-fg));
  border-radius:999px;padding:8px 16px;font-size:13.5px;font-weight:600;cursor:pointer;
  font-family:inherit}
.chip:hover{color:hsl(var(--fg))}
.chip[aria-pressed="true"]{background:hsl(var(--primary));color:hsl(var(--primary-fg));
  border-color:hsl(var(--primary))}
.search{width:100%;padding:14px 18px;border-radius:var(--radius);font-size:16px;
  background:hsl(var(--card));border:1px solid hsl(var(--border));color:hsl(var(--fg));
  margin:0 0 18px;font-family:inherit}
.search::placeholder{color:hsl(var(--muted-fg))}
.search:focus{outline:none;border-color:hsl(var(--primary) / .6)}
.count{font-size:14px;color:hsl(var(--muted-fg));margin:0 0 22px}
.empty{color:hsl(var(--muted-fg));padding:40px 0}

/* footer */
.ftr{border-top:1px solid hsl(var(--border));margin-top:72px;padding:44px 0 40px;
  color:hsl(var(--muted-fg));font-size:14.5px}
.ftr-grid{display:grid;gap:32px;grid-template-columns:1.6fr repeat(3,1fr)}
@media(max-width:760px){.ftr-grid{grid-template-columns:1fr 1fr}}
.ftr h3{font-size:12px;letter-spacing:.11em;text-transform:uppercase;color:hsl(var(--fg));
  margin:0 0 14px;font-weight:700}
.ftr ul{list-style:none;margin:0;padding:0}
.ftr li{margin-bottom:9px}
.ftr a{color:hsl(var(--muted-fg))}
.ftr a:hover{color:hsl(var(--primary))}
.ftr-bot{border-top:1px solid hsl(var(--border));margin-top:34px;padding-top:22px;
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:13.5px}
@media(max-width:620px){
  .meta{gap:6px 12px;font-size:13.5px}
  .meta .sep{display:none}
  .art{font-size:16.5px}
  .art h2{margin:40px 0 15px}
  .key{padding:18px 20px}
  .cta{padding:30px 22px}
  th,td{padding:11px 13px}
}
.skip{position:absolute;left:-9999px}
.skip:focus{left:16px;top:16px;background:hsl(var(--primary));color:hsl(var(--primary-fg));
  padding:10px 16px;border-radius:8px;z-index:100}

.dia{margin:0 0 30px;padding:20px 20px 8px;border:1px solid hsl(var(--border));
  border-radius:var(--radius);background:hsl(222 44% 7%)}
.dia svg{width:100%;height:auto;display:block}
.dia figcaption{margin-top:12px;padding-top:12px;border-top:1px solid hsl(var(--border));
  font-size:13.5px;color:hsl(var(--muted-fg));line-height:1.5}