:root{
  --bg:#0b1a38;--bg2:#0e2045;--panel:#11264f;--line:#24406f;
  --teal:#1fd1c1;--blue:#4d8dff;--text:#ffffff;--muted:#a9b8d6;--dim:#7d8fb3;
  --max:1180px;--r:4px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:"DM Sans",system-ui,sans-serif;font-size:18px;line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--teal);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{font-family:"Archivo",system-ui,sans-serif;font-weight:800;line-height:1.08;letter-spacing:-.01em}
h1{font-size:clamp(48px,8vw,104px)}
h2{font-size:clamp(34px,4.6vw,58px)}
h3{font-size:clamp(22px,2.2vw,28px)}
p{color:var(--muted)}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
.eyebrow{font-family:"Archivo",sans-serif;font-weight:700;font-size:14px;letter-spacing:.12em;text-transform:uppercase;color:var(--teal)}
.eyebrow.blue{color:var(--blue)}
.lead{font-size:clamp(19px,1.8vw,23px);color:var(--muted);max-width:760px}
.accent{color:var(--teal)}
section{padding:110px 0;border-top:1px solid rgba(36,64,111,.5)}
section.tight{padding:80px 0}

/* nav */
.nav{position:sticky;top:0;z-index:20;background:rgba(11,26,56,.88);backdrop-filter:blur(10px);border-bottom:1px solid rgba(36,64,111,.6)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-family:"Archivo";font-weight:800;font-size:20px}
.brand img{width:34px;height:34px;object-fit:contain}
.brand:hover{text-decoration:none}
.links{display:flex;gap:28px}
.links a{color:var(--muted);font-size:16px;font-weight:500}
.links a:hover,.links a.on{color:#fff;text-decoration:none}
.menu{display:none;background:none;border:1px solid var(--line);color:#fff;border-radius:var(--r);padding:6px 12px;font:inherit;font-size:15px;cursor:pointer}

/* hero */
.hero{padding:90px 0 100px;border-top:0;position:relative;overflow:hidden}
.hero .grid{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
.hero h1{margin-bottom:28px}
.hero .motto{font-family:"Archivo";font-weight:800;color:var(--teal);font-size:clamp(24px,2.8vw,36px);margin-bottom:22px}
.frame{position:relative;padding:0}
.frame img{filter:drop-shadow(0 0 24px rgba(77,141,255,.35));animation:float 7s ease-in-out infinite}
@keyframes float{50%{transform:translateY(-10px)}}
@media (prefers-reduced-motion:reduce){.frame img{animation:none}}
.status{display:inline-flex;align-items:center;gap:10px;margin-top:34px;font-size:15px;color:var(--dim)}
.dot{width:9px;height:9px;border-radius:50%;background:var(--teal);box-shadow:0 0 10px var(--teal)}

/* layout helpers */
.split{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.split.rev>:first-child{order:2}
.head{margin-bottom:56px;max-width:820px}
.head h2{margin-bottom:18px}
.photo{border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.photo img{width:100%;height:100%;object-fit:cover}

.rows>div{border-top:1px solid var(--line);padding:26px 0}
.rows h3{margin-bottom:6px}

.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.cards.two{grid-template-columns:repeat(2,1fr)}
.card{background:var(--panel);border:1px solid var(--teal);border-radius:var(--r);padding:30px}
.card.b{border-color:var(--blue)}
.card h3{margin:10px 0 12px}
.card p{font-size:17px}
.card .more{display:inline-block;margin-top:16px;font-weight:600;font-size:16px}
.tag{display:inline-block;font-family:"Archivo";font-weight:700;font-size:12px;letter-spacing:.1em;text-transform:uppercase;padding:4px 9px;border-radius:3px;background:rgba(31,209,193,.12);color:var(--teal)}
.tag.next{background:rgba(77,141,255,.14);color:var(--blue)}
.num{display:inline-grid;place-items:center;width:42px;height:36px;background:var(--teal);color:#0b1a38;font-family:"Archivo";font-weight:800;font-size:16px;border-radius:2px}
.num.b{background:var(--blue)}

/* platform tree */
.tree{text-align:center}
.tree .root{display:inline-block;background:var(--panel);border:1px solid var(--teal);padding:22px 44px;border-radius:var(--r)}
.tree .root b{display:block;font-family:"Archivo";letter-spacing:.06em;font-size:20px}
.tree .root span{color:var(--muted)}
.tree .stem{width:2px;height:40px;background:var(--teal);margin:0 auto}
.tree .bar{height:2px;background:var(--teal);margin:0 16.6%}
.tree .cards{margin-top:0}
.tree .cards .card{position:relative;margin-top:40px;text-align:left}
.tree .cards .card::before{content:"";position:absolute;top:-41px;left:50%;width:2px;height:40px;background:var(--teal)}

/* flow diagrams */
.flow{display:flex;align-items:stretch;gap:0;margin:40px 0}
.flow .step{flex:1;background:var(--panel);border:1px solid var(--teal);border-radius:var(--r);padding:22px 18px;text-align:center;display:flex;flex-direction:column;justify-content:center}
.flow .step.b{border-color:var(--blue)}
.flow .step small{display:block;font-family:"Archivo";font-weight:700;font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--teal);margin-bottom:8px}
.flow .step.b small{color:var(--blue)}
.flow .step strong{font-weight:600;font-size:18px}
.flow .step span{display:block;color:var(--muted);font-size:15px;margin-top:4px}
.flow .arrow{flex:0 0 44px;display:grid;place-items:center;color:var(--teal);font-size:22px}

.callout{font-family:"Archivo";font-weight:800;color:var(--teal);font-size:clamp(22px,2.4vw,30px);line-height:1.25;margin-top:30px}
.note{font-size:16px;color:var(--dim)}

.query{border:1px solid var(--teal);background:var(--panel);padding:22px 28px;font-size:clamp(20px,2.2vw,28px);margin-top:18px;border-radius:var(--r);display:flex;gap:14px;align-items:center}
.query .cursor{width:2px;height:1.1em;background:var(--teal);animation:blink 1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}

/* table */
.stack{width:100%;border-collapse:collapse;border:1px solid var(--line)}
.stack th{text-align:left;font-family:"Archivo";font-size:13px;letter-spacing:.12em;text-transform:uppercase;color:var(--teal);padding:18px 24px;background:var(--panel);border-bottom:1px solid var(--line)}
.stack td{padding:20px 24px;border-bottom:1px solid var(--line);vertical-align:top}
.stack tr:nth-child(even) td{background:rgba(17,38,79,.5)}
.stack td:last-child{color:var(--muted)}

/* glossary */
.gloss{display:grid;grid-template-columns:repeat(2,1fr);gap:0 56px}
.gloss div{border-top:1px solid var(--line);padding:22px 0}
.gloss dt{font-family:"Archivo";font-weight:700;font-size:20px;margin-bottom:6px}
.gloss dd{color:var(--muted);font-size:17px}
.toc{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.toc a{border:1px solid var(--line);padding:7px 14px;border-radius:999px;font-size:15px;color:var(--muted)}
.toc a:hover{border-color:var(--teal);color:#fff;text-decoration:none}

/* page header */
.pagehead{padding:90px 0 70px;border-top:0}
.pagehead h1{font-size:clamp(44px,6.5vw,84px);margin:14px 0 22px}

/* footer */
footer{border-top:1px solid var(--line);padding:56px 0 40px;background:var(--bg2)}
footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:30px}
footer p{font-size:15px}
footer .links{flex-wrap:wrap;gap:22px}
.btn{display:inline-block;border:1px solid var(--teal);color:#fff;padding:13px 24px;border-radius:var(--r);font-weight:600;font-size:16px;margin-top:26px}
.btn:hover{background:rgba(31,209,193,.12);text-decoration:none}

@media (max-width:900px){
  body{font-size:17px}
  section{padding:76px 0}
  .hero .grid,.split{grid-template-columns:1fr;gap:40px}
  .split.rev>:first-child{order:0}
  .hero .grid .frame{max-width:420px;margin:0 auto}
  .cards,.cards.two,.gloss{grid-template-columns:1fr}
  .tree .bar,.tree .cards .card::before{display:none}
  .tree .cards .card{margin-top:18px}
  .flow{flex-direction:column}
  .flow .arrow{flex-basis:34px;transform:rotate(90deg)}
  .links{display:none;position:absolute;top:68px;left:0;right:0;flex-direction:column;gap:0;background:var(--bg);border-bottom:1px solid var(--line)}
  .links.open{display:flex}
  .links a{padding:15px 24px;border-top:1px solid rgba(36,64,111,.5)}
  .menu{display:block}
  .wrap{padding:0 16px}
  .stack th,.stack td{padding:14px}
}

/* v2 additions */
.problems>div{display:grid;grid-template-columns:90px 260px 1fr;gap:24px;align-items:start;border-top:1px solid var(--line);padding:28px 0}
.problems .n{font-family:"Archivo";font-weight:800;font-size:44px;color:var(--blue);line-height:1}
.problems h3{margin:6px 0 0}
.band{background:var(--teal);color:#0b1a38;font-family:"Archivo";font-weight:800;font-size:clamp(18px,1.8vw,22px);padding:22px 28px;border-radius:var(--r);margin-top:36px}
.tiers{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.tier{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.tier img{width:100%;aspect-ratio:683/324;object-fit:cover}
.tier div{padding:24px}
.tier h3{color:var(--teal);letter-spacing:.04em}
.tier .who{font-weight:600;color:#fff;margin:4px 0 10px}
.tier p{font-size:16px}
.team{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.member{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:30px}
.member::before{content:"";display:block;width:36px;height:3px;background:var(--teal);margin-bottom:18px}
.member h3{margin-bottom:6px}
.member .role{color:var(--teal);font-weight:600;margin-bottom:12px}
.member p{font-size:16px}
.specs{width:100%;border-collapse:collapse;border:1px solid var(--line)}
.specs td{padding:16px 22px;border-bottom:1px solid var(--line);vertical-align:top}
.specs td:first-child{font-family:"Archivo";font-weight:700;color:var(--teal);width:190px}
.specs td:last-child{color:var(--muted)}
.specs tr:nth-child(even) td{background:rgba(17,38,79,.5)}
.bigimg{position:relative;border-radius:var(--r);overflow:hidden;border:1px solid var(--line)}
.bigimg img{width:100%;max-height:520px;object-fit:cover}
.bigimg .cap{position:absolute;left:24px;bottom:24px;right:24px;max-width:520px;background:rgba(11,26,56,.88);border:1px solid var(--teal);padding:18px 22px;border-radius:var(--r)}
.bigimg .cap p{color:#fff;font-size:17px;margin-top:6px}
@media (max-width:900px){
  .problems>div{grid-template-columns:1fr;gap:6px}
  .tiers,.team{grid-template-columns:1fr}
  .specs td:first-child{width:auto}
  .bigimg .cap{position:static;max-width:none;border:0;border-top:1px solid var(--teal);border-radius:0}
}