:root{color-scheme:dark;--bg:#05070A;--panel:#0A0F14;--line:#1C333F;--text:#EAF7FF;--soft:#B6CFDC;--muted:#8396A2;--button:#10212A;--button-line:#244351;--accent:#00B7FF;--violet:#7C5CFF;--pink:#FF3D9A;--ease:cubic-bezier(.2,.8,.2,1);--spring:cubic-bezier(.34,1.56,.64,1)}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:24px}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.6 "Segoe UI Variable Text","Segoe UI",system-ui,sans-serif;overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer;-webkit-tap-highlight-color:transparent}
img{max-width:100%;height:auto}
a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:4px}
::selection{background:#00B7FF55}

/* background */
.bg{position:fixed;inset:0;z-index:-1;pointer-events:none;overflow:hidden}
.bg i{position:absolute;border-radius:50%;filter:blur(90px);opacity:.28}
.bg i:nth-child(1){width:60vmax;height:60vmax;left:-20vmax;top:-25vmax;background:radial-gradient(circle,var(--accent),transparent 62%);animation:d1 28s ease-in-out infinite alternate}
.bg i:nth-child(2){width:55vmax;height:55vmax;right:-25vmax;top:20vh;background:radial-gradient(circle,var(--violet),transparent 62%);animation:d2 34s ease-in-out infinite alternate}
.bg i:nth-child(3){width:50vmax;height:50vmax;left:20vw;bottom:-35vmax;background:radial-gradient(circle,var(--pink),transparent 62%);opacity:.16;animation:d1 40s ease-in-out infinite alternate-reverse}
.bg .grid{position:absolute;inset:0;background-image:linear-gradient(#1C333F33 1px,transparent 1px),linear-gradient(90deg,#1C333F33 1px,transparent 1px);background-size:48px 48px;mask-image:radial-gradient(ellipse at 50% 20%,#000 20%,transparent 70%);-webkit-mask-image:radial-gradient(ellipse at 50% 20%,#000 20%,transparent 70%)}
@keyframes d1{to{transform:translate(14vmax,10vmax) scale(1.12)}}
@keyframes d2{to{transform:translate(-12vmax,8vmax) scale(.9)}}

/* header */
.top,main,footer{width:min(1240px,calc(100% - 64px));margin:auto}
.top{height:96px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:11px;font-size:21px;font-weight:800;letter-spacing:.2px}
.brand b{color:var(--accent);font-weight:800}
.brand img{filter:drop-shadow(0 0 10px #00B7FF88)}
.version{align-self:flex-start;margin-top:6px;color:var(--muted);font:11px Consolas,monospace;border:1px solid var(--line);border-radius:10px;padding:1px 7px}
nav{display:flex;align-items:center;gap:30px;font-size:14px}
nav a{color:var(--muted);transition:color .15s}
nav a:hover{color:var(--text)}
.lang-seg{display:inline-flex;gap:3px;padding:3px;border:1px solid var(--button-line);border-radius:10px;background:var(--button)}
.lang-seg button{border:0;background:transparent;border-radius:7px;padding:6px 11px;font:700 12px Consolas,monospace;color:var(--muted);transition:all .15s}
.lang-seg button:hover{color:var(--text)}
.lang-seg button.active{background:var(--accent);color:#051016;box-shadow:0 2px 12px #00B7FF66}

/* hero */
.hero{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center;padding:64px 0 90px;min-height:min(calc(100vh - 96px),860px)}
.eyebrow,.section-no,.meta{font-family:Consolas,"Courier New",monospace;font-size:12px;letter-spacing:1.6px;color:var(--muted)}
.br{color:var(--accent);font-size:17px}
h1{font-family:"Segoe UI Variable Display","Segoe UI",sans-serif;font-size:clamp(54px,7vw,104px);line-height:.98;letter-spacing:-4px;font-weight:700;margin:22px 0 30px}
h1 span{display:block}
.glow-text{padding-bottom:.12em;margin-bottom:-.12em;background:linear-gradient(100deg,#36D9FF,var(--accent) 35%,var(--violet) 70%,var(--pink));-webkit-background-clip:text;background-clip:text;color:transparent;filter:drop-shadow(0 0 28px #00B7FF55);background-size:200% 100%;animation:sheen 8s ease-in-out infinite alternate}
@keyframes sheen{to{background-position:100% 0}}
.intro{max-width:470px;color:var(--soft);font-size:18px;line-height:1.65;margin:0 0 34px}
.cta{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.download{position:relative;overflow:hidden;display:inline-flex;align-items:center;gap:12px;padding:17px 26px;border-radius:12px;font-weight:700;color:#051016;background:linear-gradient(135deg,var(--accent),#5b7cff 70%,#a65cff);box-shadow:0 10px 34px #00B7FF55,inset 0 1px 0 #ffffff66;transition:transform .2s var(--spring),box-shadow .2s}
.download:hover{transform:translateY(-3px);box-shadow:0 16px 44px #00B7FF88,inset 0 1px 0 #ffffff77}
.download:active{transform:scale(.97)}
.download::after{content:"";position:absolute;inset:0;background:linear-gradient(110deg,transparent 30%,#ffffff55 50%,transparent 70%);transform:translateX(-120%);animation:shine 4.5s ease-in-out infinite}
@keyframes shine{0%,60%{transform:translateX(-120%)}85%,100%{transform:translateX(120%)}}
.download svg{width:21px;height:21px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.ghost{padding:16px 22px;border-radius:12px;border:1px solid var(--button-line);background:#10212A99;color:var(--soft);transition:all .15s}
.ghost:hover{border-color:var(--accent);color:var(--text)}
.meta{margin-top:22px}
.news{margin:10px 0 0;max-width:520px;font-size:14px;color:var(--soft);padding:10px 14px;border-left:3px solid var(--accent);background:#00B7FF12;border-radius:0 10px 10px 0}

.hero-art{position:relative;min-height:620px;perspective:1400px}
.logo-orb{position:absolute;left:-40px;top:0;width:250px;height:250px;z-index:2;animation:float 7s ease-in-out infinite;transform-style:preserve-3d;transition:transform .2s ease-out}
.logo-orb img{position:relative;z-index:2;width:100%;filter:drop-shadow(0 30px 60px #00B7FF66) drop-shadow(0 0 40px #7C5CFF55)}
.ring{position:absolute;inset:-26px;border-radius:50%;border:1px solid #00B7FF44;animation:spin 18s linear infinite}
.ring::before{content:"";position:absolute;top:-4px;left:50%;width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 16px var(--accent)}
.ring.r2{inset:-56px;border-color:#7C5CFF33;animation-duration:30s;animation-direction:reverse}
.ring.r2::before{background:var(--pink);box-shadow:0 0 16px var(--pink)}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes float{50%{translate:0 -16px}}
.shot{margin:0;border-radius:18px;overflow:hidden;border:1px solid var(--line);background:var(--panel);box-shadow:0 40px 90px #000000aa,0 0 0 1px #ffffff08,0 0 60px #00B7FF22}
.shot img{display:block;width:100%}
.hero-shot{position:absolute;right:0;top:220px;width:min(540px,100%);transform:rotateY(-12deg) rotateX(4deg);transform-origin:left center;transition:transform .5s var(--ease)}
.hero-shot:hover{transform:rotateY(-4deg) rotateX(1deg)}
.float{position:absolute;z-index:3;font:600 14px Consolas,monospace;padding:9px 14px;border-radius:12px;background:#0A0F14d9;border:1px solid var(--button-line);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);box-shadow:0 10px 30px #00000088;animation:float 6s ease-in-out infinite}
.float.f1{right:-10px;top:70px;color:var(--accent)}
.float.f2{left:10px;bottom:40px;color:#A67CFF;animation-delay:-2s}
.float.f3{right:40px;bottom:-6px;color:#31D0A1;animation-delay:-4s}

/* strip */
.strip{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:18px;background:#0A0F14cc;overflow:hidden}
.strip div{padding:26px 28px;border-left:1px solid var(--line)}
.strip div:first-child{border-left:0}
.strip b{display:block;font:700 44px/1 "Segoe UI Variable Display","Segoe UI",sans-serif;background:linear-gradient(135deg,#fff,var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.strip span{color:var(--muted);font-size:14px}

/* sections */
section{padding:110px 0 0}
.section-no{color:var(--accent)}
h2{font:700 clamp(36px,4.6vw,62px)/1.05 "Segoe UI Variable Display","Segoe UI",sans-serif;letter-spacing:-2px;margin:14px 0 40px;max-width:900px}
.mode-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}
.mode-tabs button{border:1px solid var(--button-line);background:var(--button);border-radius:22px;padding:9px 18px;color:var(--soft);transition:all .2s}
.mode-tabs button:hover{border-color:var(--accent);color:var(--text)}
.mode-tabs button.on{background:var(--accent);border-color:var(--accent);color:#051016;font-weight:700;box-shadow:0 4px 20px #00B7FF66}
.mode-stage{display:grid;grid-template-columns:1.4fr 1fr;gap:40px;align-items:center}
.mode-stage .shot{max-height:680px;display:flex;justify-content:center;background:#05070A}
.mode-stage .shot img{width:auto;max-width:100%;max-height:680px;transition:opacity .3s,transform .4s var(--ease)}
.mode-stage .shot img.swap{opacity:0;transform:scale(.98)}
.mode-copy h3{font-size:28px;margin:0 0 12px}
.mode-copy p{color:var(--soft);font-size:17px}
.mode-copy ul{padding:0;margin:18px 0 0;list-style:none;display:grid;gap:8px}
.mode-copy li{padding-left:24px;position:relative;color:var(--soft)}
.mode-copy li::before{content:"";position:absolute;left:4px;top:.6em;width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px var(--accent)}
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:56px}
.cards article{position:relative;padding:24px;border-radius:18px;border:1px solid var(--line);background:var(--panel);overflow:hidden;transition:transform .25s var(--ease),border-color .2s}
.cards article::before{content:"";position:absolute;inset:0;background:radial-gradient(240px circle at var(--x,50%) var(--y,0%),#00B7FF22,transparent 60%);opacity:0;transition:opacity .25s}
.cards article:hover{transform:translateY(-4px);border-color:#00B7FF88}
.cards article:hover::before{opacity:1}
.ic{display:grid;place-items:center;width:44px;height:44px;border-radius:12px;background:#10212A;border:1px solid var(--button-line);color:var(--accent);font:700 20px "Segoe UI",sans-serif;margin-bottom:16px;box-shadow:0 0 20px #00B7FF22}
.cards h3{margin:0 0 8px;font-size:18px}
.cards p{margin:0;color:var(--muted);font-size:14.5px;line-height:1.55}

/* feel */
.feel-grid{display:grid;grid-template-columns:420px 1fr;gap:60px;align-items:start}
.demo-pad{padding:18px;border-radius:24px;border:1px solid var(--line);background:linear-gradient(160deg,#00B7FF12,transparent 40%),var(--panel);box-shadow:0 30px 80px #00000099}
.demo-display{min-height:110px;border-radius:16px;border:1px solid var(--line);background:#05070A;padding:14px 18px;display:flex;flex-direction:column;align-items:flex-end;justify-content:flex-end;margin-bottom:12px;position:relative;overflow:hidden}
.demo-display::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:linear-gradient(90deg,transparent,var(--accent),var(--violet),transparent)}
.demo-display span{color:var(--muted);font-size:15px;min-height:22px}
.demo-display b{font:600 46px/1.1 "Segoe UI Variable Display","Segoe UI",sans-serif;white-space:nowrap;max-width:100%;overflow:hidden}
.demo-display b.pop{animation:pop .45s var(--spring)}
@keyframes pop{0%{transform:translateY(10px) scale(.95);opacity:.4}60%{text-shadow:0 0 24px #00B7FFcc}}
.demo-keys{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}
.demo-keys button{--mx:-100px;--my:-100px;position:relative;isolation:isolate;overflow:hidden;height:62px;border-radius:12px;border:1px solid #2A4B5A;background:#13262F;font:600 22px "Segoe UI Variable Display","Segoe UI",sans-serif;transition:transform .12s var(--spring),background .15s,border-color .2s,box-shadow .25s}
.demo-keys button::before{content:"";position:absolute;inset:0;border-radius:inherit;padding:1px;background:radial-gradient(80px circle at var(--mx) var(--my),#00B7FFee,transparent 70%);-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none}
.demo-keys button:hover{background:#1A3746}
.demo-keys button.op{color:var(--accent);background:var(--button);border-color:var(--button-line)}
.demo-keys button.fn{color:var(--soft);background:var(--button);border-color:var(--button-line)}
.demo-keys button.eq{color:#051016;border-color:transparent;background:linear-gradient(135deg,var(--accent),#5b7cff);box-shadow:0 6px 22px #00B7FF55}
.demo-keys button:active,.demo-keys button.pressed{transform:scale(.92);border-color:var(--accent);box-shadow:0 0 0 1px var(--accent),0 0 22px #00B7FF77}
.demo-keys .rip{position:absolute;z-index:-1;border-radius:50%;pointer-events:none;transform:translate(-50%,-50%) scale(0);background:radial-gradient(circle,#00B7FF99,#00B7FF2a 45%,transparent 70%);animation:rip .55s var(--ease) forwards}
.demo-keys .eq .rip{background:radial-gradient(circle,#ffffffbb,#ffffff33 45%,transparent 70%)}
@keyframes rip{to{transform:translate(-50%,-50%) scale(1);opacity:0}}
.demo-hint{color:var(--muted);font-size:13px;text-align:center;margin:12px 0 0}
.feel-list{list-style:none;padding:0;margin:0;display:grid;gap:4px}
.feel-list li{padding:20px 0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:240px 1fr;gap:20px}
.feel-list b{font-size:18px}
.feel-list span{color:var(--soft)}

/* install */
.install ol{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.install li{display:flex;gap:16px;padding:26px;border-radius:18px;border:1px solid var(--line);background:var(--panel)}
.install li>span{font:700 13px Consolas,monospace;color:var(--accent);padding-top:5px}
.install h3{margin:0 0 6px}
.install p{margin:0;color:var(--muted);font-size:15px}
.final-cta{margin:40px 0 0;display:flex;align-items:center;gap:24px;padding:28px 32px;border-radius:24px;border:1px solid #00B7FF55;background:linear-gradient(120deg,#00B7FF1f,#7C5CFF14 50%,transparent),var(--panel);box-shadow:0 0 60px #00B7FF1a}
.final-cta img{filter:drop-shadow(0 0 22px #00B7FF88)}
.final-cta>div{flex:1;min-width:0}
.final-title{margin:0;font-size:26px;font-weight:800}
.final-title b{color:var(--accent)}
.hash{margin:4px 0 0;font:12px Consolas,monospace;color:var(--muted);word-break:break-all}

footer{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:36px 0 46px;margin-top:110px;border-top:1px solid var(--line);color:var(--muted);font-size:14px}
footer .brand{font-size:16px}
footer .xasi{color:var(--accent);font-weight:700;letter-spacing:.5px}

/* reveal */
.js .reveal{opacity:0;transform:translateY(30px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.js .reveal.in{opacity:1;transform:none}

/* XASI close button (mobile / touch), same as (dis)connect */
.xasi-close-button{display:none}
@media (max-width:900px),(hover:none),(pointer:coarse){
  html,body{max-width:100%;overflow-x:hidden}
  .top{padding-top:env(safe-area-inset-top);padding-right:56px}
  .xasi-close-button{position:fixed;top:max(12px,env(safe-area-inset-top));right:max(16px,env(safe-area-inset-right));z-index:1000;width:44px;height:44px;display:grid;place-items:center;border:1px solid color-mix(in srgb,var(--accent) 60%,transparent);border-radius:50%;background:rgba(6,7,12,.88);color:var(--accent);font-family:Consolas,monospace;font-size:1.65rem;line-height:1;text-decoration:none;box-shadow:0 0 18px color-mix(in srgb,var(--accent) 25%,transparent),inset 0 0 16px color-mix(in srgb,var(--accent) 8%,transparent);backdrop-filter:blur(10px) saturate(1.16);-webkit-backdrop-filter:blur(10px) saturate(1.16);transition:transform .16s ease,filter .16s ease}
  .xasi-close-button:hover,.xasi-close-button:focus-visible{outline:none;filter:brightness(1.18);transform:translateY(-1px)}
}

@media (max-width:1100px){
  .hero{grid-template-columns:1fr;min-height:0}
  .hero-art{min-height:520px}
  .cards{grid-template-columns:repeat(2,1fr)}
  .feel-grid{grid-template-columns:1fr}
  .demo-pad{max-width:440px}
  .mode-stage{grid-template-columns:1fr}
}
@media (max-width:720px){
  .top,main,footer{width:calc(100% - 32px)}
  .top{height:76px}
  nav a{display:none}
  h1{letter-spacing:-2px}
  .hero{padding-top:40px}
  .hero-art{min-height:420px}
  .logo-orb{width:180px;height:180px;left:0}
  .hero-shot{top:110px;transform:none}
  .float.f1{top:20px}
  .strip{grid-template-columns:1fr 1fr}
  .strip div:nth-child(3){border-left:0}
  .strip div:nth-child(n+3){border-top:1px solid var(--line)}
  .cards{grid-template-columns:1fr}
  .feel-list li{grid-template-columns:1fr;gap:4px}
  .install ol{grid-template-columns:1fr}
  .final-cta{flex-direction:column;text-align:center}
  footer{flex-direction:column;text-align:center}
}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}.js .reveal{opacity:1;transform:none}}