:root{--bg:#070a14;--bg2:#0d1224;--line:#232b52;--tx:#e9ecf6;--mut:#a9b1c9;--cyan:#22d3ee;--purple:#8b5cf6;--grad:linear-gradient(135deg,#8b5cf6,#22d3ee);--r:16px}
*,*:before,*:after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:90px;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--tx);font:16px/1.65 -apple-system,BlinkMacSystemFont,"SF Pro Display","Segoe UI",Roboto,Arial,sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--cyan)}img,svg{max-width:100%;height:auto}
.wrap{width:min(100% - 40px,1180px);margin:0 auto}
.skip{position:absolute;left:-999px;top:8px;background:#fff;color:#000;padding:10px 14px;border-radius:8px;z-index:100}.skip:focus{left:12px}
:focus-visible{outline:3px solid var(--cyan);outline-offset:3px;border-radius:6px}
/* header */
.hdr{position:sticky;top:0;z-index:50;background:rgba(7,10,20,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.hdr .wrap{display:flex;align-items:center;gap:28px;height:68px}
.logo img{display:block;height:34px;width:auto}
.nav{display:flex;gap:26px;margin-left:auto;margin-right:12px}
.nav a{color:#cfd5e8;text-decoration:none;font-size:15px;padding:6px 2px;border-bottom:2px solid transparent}
.nav a:hover{color:#fff}.nav a[aria-current=page]{color:#fff;border-bottom-color:var(--purple)}
.btn{display:inline-flex;align-items:center;gap:8px;border:1.5px solid var(--cyan);color:var(--cyan);text-decoration:none;font-weight:600;font-size:15px;padding:10px 20px;border-radius:12px;background:transparent;transition:background .2s,color .2s}
.btn:hover{background:var(--cyan);color:#04121a}
.btn.solid{background:var(--grad);border-color:transparent;color:#fff}.btn.solid:hover{filter:brightness(1.1);color:#fff}
/* hero */
.hero{position:relative;overflow:hidden;padding:84px 0 70px}
.hero:before{content:"";position:absolute;inset:-20% -10% auto 35%;height:120%;background:radial-gradient(closest-side,rgba(139,92,246,.28),rgba(34,211,238,.10) 55%,transparent 75%);pointer-events:none}
.hero .dna{position:absolute;right:6%;top:30px;height:92%;width:auto;opacity:.5;filter:drop-shadow(0 0 28px rgba(139,92,246,.6));pointer-events:none}
.eyebrow{font:600 12px ui-monospace,Menlo,Consolas,monospace;letter-spacing:.22em;text-transform:uppercase;color:var(--mut)}
h1{font-size:clamp(38px,6vw,68px);line-height:1.06;margin:18px 0 18px;letter-spacing:-.025em;position:relative}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:clamp(17px,2vw,21px);color:#cfd5e8;max-width:620px;margin:0;position:relative}
/* featured */
.feat{display:grid;grid-template-columns:1.05fr 1fr;gap:34px;align-items:center;border:1px solid var(--line);border-radius:20px;background:linear-gradient(135deg,rgba(139,92,246,.12),rgba(13,18,36,.9) 50%);padding:38px;margin:0 0 70px;position:relative;overflow:hidden}
.feat h2{font-size:clamp(28px,3.4vw,42px);line-height:1.12;margin:12px 0 14px;letter-spacing:-.02em}
.feat p{color:#cfd5e8;margin:0 0 20px}
.feat .fig{background:rgba(7,10,20,.6);border:1px solid var(--line);border-radius:14px;padding:12px}
.badge{display:inline-block;font:600 11px ui-monospace,Menlo,Consolas,monospace;letter-spacing:.16em;text-transform:uppercase;color:var(--cyan)}
.more{color:var(--cyan);font-weight:600;text-decoration:none;border-bottom:1.5px solid var(--cyan);padding-bottom:2px}
.more:hover{color:#fff;border-color:#fff}
/* filter + grid */
.bar{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin:0 0 26px}
.bar h2{font-size:clamp(26px,3vw,34px);margin:0;letter-spacing:-.02em}
.bar .rule{flex:1;height:1px;background:var(--line);min-width:30px}
.filters{display:flex;flex-wrap:wrap;gap:10px}
.filters button{font:inherit;font-size:14px;color:#cfd5e8;background:transparent;border:1px solid var(--line);border-radius:10px;padding:9px 16px;cursor:pointer}
.filters button:hover{border-color:var(--purple);color:#fff}
.filters button[aria-pressed=true]{background:rgba(139,92,246,.22);border-color:var(--purple);color:#fff}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;padding:0 0 70px;margin:0;list-style:none}
.card{display:flex;flex-direction:column;height:100%;border:1px solid var(--line);border-radius:var(--r);background:var(--bg2);overflow:hidden;transition:transform .25s,border-color .25s}
.card:hover,.card:focus-within{transform:translateY(-3px);border-color:#4b3fa8}
.card .th{display:block;height:150px;background:#0a0f1f;border-bottom:1px solid var(--line)}
.card .th svg{display:block;width:100%;height:100%}
.card .bd{display:flex;flex-direction:column;flex:1;padding:20px 22px 22px}
.meta{display:flex;justify-content:space-between;gap:10px;font:600 11px ui-monospace,Menlo,Consolas,monospace;letter-spacing:.14em;text-transform:uppercase;color:var(--mut)}
.meta .c{color:#a78bfa}
.card h3{font-size:21px;line-height:1.25;margin:12px 0 10px;letter-spacing:-.01em}
.card h3 a{color:#fff;text-decoration:none}.card h3 a:after{content:"";position:absolute;inset:0}
.card{position:relative}
.card p{color:var(--mut);margin:0 0 16px;font-size:15px;flex:1}
.empty{color:var(--mut);padding:0 0 60px}
/* article */
.art{padding:56px 0 30px}
.crumbs{font-size:14px;color:var(--mut);margin:0 0 24px}.crumbs a{color:var(--mut)}
.art h1{font-size:clamp(32px,5vw,52px);max-width:880px}
.art .meta{justify-content:flex-start;gap:18px;margin:18px 0 0;flex-wrap:wrap}
.prose{max-width:720px;font-size:18px;line-height:1.75;color:#dfe3f1}
.prose h2{font-size:28px;line-height:1.25;margin:2.1em 0 .6em;color:#fff;letter-spacing:-.015em}
.prose h3{font-size:21px;margin:1.6em 0 .4em;color:#fff}
.prose p{margin:0 0 1.15em}.prose li{margin:.35em 0}
.prose blockquote{margin:0 0 1.8em;padding:16px 20px;border-left:3px solid var(--purple);background:rgba(139,92,246,.1);border-radius:0 12px 12px 0;color:#e7eaf3}
.prose blockquote p{margin:0}
.prose figure{margin:2em 0}.prose figure.wide{max-width:940px}
.prose .diagram{background:var(--bg2);border:1px solid var(--line);border-radius:14px;padding:10px;width:100%}
.prose em{color:var(--mut)}
.cta{border:1px solid var(--line);border-radius:18px;background:linear-gradient(135deg,rgba(139,92,246,.14),rgba(13,18,36,.9));padding:30px;margin:40px 0 20px;max-width:720px}
.cta h2{margin:0 0 8px;font-size:24px}.cta p{margin:0 0 18px;color:#cfd5e8}
.related{padding:30px 0 70px}.related h2{font-size:26px;margin:0 0 20px}
.related .grid{grid-template-columns:repeat(2,1fr);padding-bottom:0}
.wrap>.cta{max-width:none;margin:0 auto 70px}
/* footer */
.ftr{border-top:1px solid var(--line);padding:30px 0;color:var(--mut);font-size:14px}
.ftr .wrap{display:flex;flex-wrap:wrap;gap:12px 26px;align-items:center}
.ftr a{color:var(--mut)}.ftr .sp{margin-left:auto}
/* motion */
.rise{animation:rise .6s ease both}
@keyframes rise{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
/* responsive */
@media (max-width:1000px){.grid{grid-template-columns:repeat(2,1fr)}.feat{grid-template-columns:1fr;padding:28px}.hero .dna{opacity:.28;right:-6%}}
@media (max-width:680px){.prose figure.wide{overflow-x:auto;-webkit-overflow-scrolling:touch}.prose figure.wide .diagram{min-width:680px}.hdr .wrap{gap:12px;height:62px}.nav{display:none}.hdr .btn{margin-left:auto;padding:9px 14px;font-size:14px}.logo img{height:28px}
.grid,.related .grid{grid-template-columns:1fr}.hero{padding:52px 0 44px}.hero .dna{display:none}.prose{font-size:17px}.feat{padding:22px;margin-bottom:50px}.bar .rule{display:none}}

.art header{margin-bottom:30px}