/* Betopia AI Cloud landing. Tokens mirror design/betopia-ai-cloud.pen.
   Square corners and 1px hairlines everywhere; the accent is a fill on light
   bands and may be text only on dark ones. */
:root{
  --ink:#05070a; --paper:#fff; --smoke:#15181c; --black:#000;
  --ac:#3df5a0; --ac-deep:#0d9b62; --flag:#f42a41;
  --on-dark:#f4f6f5; --on-dark-dim:#9aa3a0; --on-light-dim:#4a5250;
  --line-dark:#262b30; --line-light:#d9dedc;
  --display:'Host Grotesk','Anek Bangla',system-ui,sans-serif;
  --mono:'DM Mono','Hind Siliguri',ui-monospace,Menlo,monospace;
  --pixel:'Pixelify Sans','Host Grotesk',sans-serif;
  --bn-display:'Anek Bangla','Host Grotesk',sans-serif;
  --bn-body:'Hind Siliguri','DM Mono',sans-serif;
  --max:1376px; --gutter:clamp(16px,4.4vw,64px);
  --sec:clamp(72px,9vw,120px);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;scroll-padding-top:72px}
body{background:var(--ink);color:var(--on-dark);font-family:var(--display);font-size:17px;line-height:1.5;-webkit-font-smoothing:antialiased;overflow-x:clip}
img,video,canvas{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul{list-style:none}
:focus-visible{outline:2px solid var(--ac);outline-offset:3px}
.light :focus-visible,.cta :focus-visible{outline-color:var(--ink)}
.skip{position:absolute;left:-999px;top:8px;z-index:99;background:var(--ac);color:var(--ink);padding:8px 12px;font-family:var(--mono)}
.skip:focus{left:8px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.wrap{width:100%;max-width:var(--max);margin:0 auto;padding:0 var(--gutter)}
.wrap>*{min-width:0}

/* pixel glyph: a single letter set in the bitmap face (M3) */
.px{font-family:var(--pixel);font-style:normal;font-weight:400;letter-spacing:0}

/* type */
h1,h2,h3,h4{font-weight:400;letter-spacing:-.02em}
h2{font-size:clamp(34px,4.2vw,56px);line-height:1.08;text-wrap:balance}
h2 .dim{color:var(--on-dark-dim)}
.h3{font-size:clamp(30px,3.2vw,44px)}
.h4{font-size:clamp(30px,3vw,44px)}
.lede{font-family:var(--mono);font-size:15px;line-height:1.65;color:var(--on-dark-dim);max-width:44em;margin-top:18px}
.light .lede,.light .fine{color:var(--on-light-dim)}
.fine{font-family:var(--mono);font-size:12px;color:var(--on-dark-dim);margin-top:18px}
html[lang="bn"] body{font-family:var(--bn-display)}
html[lang="bn"] .lede,html[lang="bn"] .fine,html[lang="bn"] .ucols p,html[lang="bn"] .ucols li,html[lang="bn"] .wave-cols small,html[lang="bn"] .ans p,html[lang="bn"] .pcard .d{font-family:var(--bn-body)}
html[lang="bn"] h1,html[lang="bn"] h2{letter-spacing:0;line-height:1.25}

/* buttons: mono uppercase, square, trailing arrow */
.btn{display:inline-flex;align-items:center;gap:10px;font-family:var(--mono);font-size:14px;letter-spacing:.06em;text-transform:uppercase;padding:14px 22px;border:1px solid transparent;white-space:nowrap;transition:background .2s,color .2s,border-color .2s,transform .2s}
.btn em{font-style:normal;transition:transform .2s}
.btn:hover em{transform:translate(2px,-2px)}
.btn.sm{font-size:12px;padding:9px 16px}
.btn-ac{background:var(--ac);color:var(--ink)}
.btn-ac:hover{background:#7bffc4}
.btn-ink{background:var(--ink);color:var(--on-dark)}
.btn-ink:hover{background:#1b2026}
.btn-line{border-color:var(--on-dark-dim);color:var(--on-dark)}
.btn-line:hover{border-color:var(--on-dark)}
.btn-ghost{border-color:rgba(244,246,245,.35);color:var(--on-dark);background:rgba(5,7,10,.35);backdrop-filter:blur(6px)}
.btn-ghost:hover{border-color:var(--on-dark)}
.btn-line-ink{border-color:var(--ink);color:var(--ink)}
.btn-line-ink:hover{background:rgba(5,7,10,.08)}
html[lang="bn"] .btn{font-family:var(--bn-body);text-transform:none;letter-spacing:0;font-size:15px}

/* S0 announcement */
.announce{background:var(--ac);color:var(--ink);font-family:var(--mono);font-size:12px;letter-spacing:.03em;display:flex;justify-content:center;gap:10px;padding:6px var(--gutter);text-align:center;flex-wrap:wrap}
.announce a{text-decoration:underline;text-underline-offset:3px;font-weight:500;text-transform:uppercase}
.announce .short{display:none}

/* nav */
.nav{position:sticky;top:0;z-index:50;background:var(--ink);border-bottom:1px solid var(--line-dark)}
.nav-in{max-width:var(--max);margin:0 auto;padding:0 var(--gutter);height:60px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:10px;font-size:19px}
.brand .wm{font-weight:600;letter-spacing:-.01em}
.brand .wm.px{color:var(--ac);font-weight:400;margin-left:-4px}
.mark{width:22px;height:22px;background:var(--ac);display:grid;place-items:center}
.mark i{width:9px;height:9px;border-radius:50%;background:var(--flag)}
.links{display:flex;gap:30px;font-size:14px}
.links a{opacity:.9;transition:opacity .2s,color .2s}
.links a:hover{color:var(--ac)}
.links em{font-style:normal;font-size:11px;opacity:.7}
.nav-act{display:flex;align-items:center;gap:12px}
.lang{font-family:var(--mono);font-size:12px;color:var(--on-dark-dim);padding:6px 4px}
.lang .on{color:var(--on-dark)}
.lang [lang="bn"]{font-family:var(--bn-body)}
.burger{display:none;width:40px;height:40px;position:relative}
.burger i{position:absolute;left:10px;right:10px;height:1.5px;background:var(--on-dark);transition:transform .25s}
.burger i:first-child{top:15px}.burger i:last-child{top:23px}
.burger[aria-expanded="true"] i:first-child{transform:translateY(4px) rotate(45deg)}
.burger[aria-expanded="true"] i:last-child{transform:translateY(-4px) rotate(-45deg)}
.sheet{border-top:1px solid var(--line-dark);padding:12px var(--gutter) 24px;display:grid;gap:4px}
.sheet[hidden]{display:none}
.sheet a{padding:12px 0;border-bottom:1px solid var(--line-dark);font-size:18px}
.sheet .btn{margin-top:14px;justify-content:center}

/* S1 hero */
.hero{position:relative;min-height:min(820px,calc(100svh - 90px));display:flex;align-items:center;overflow:hidden;isolation:isolate}
.hero-vid{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-2}
.hero-shade{position:absolute;inset:0;z-index:-1;background:linear-gradient(90deg,rgba(5,7,10,.94) 0%,rgba(5,7,10,.72) 48%,rgba(5,7,10,.25) 100%),linear-gradient(0deg,rgba(5,7,10,.7),rgba(5,7,10,0) 30%)}
.hero-in{padding-top:56px;padding-bottom:72px}
.badge{display:inline-flex;border:1px solid var(--on-dark);font-family:var(--mono);font-size:12px;letter-spacing:.04em}
.badge>span{padding:11px 14px;background:rgba(5,7,10,.7)}
.badge b{font-weight:500;display:flex;align-items:center;gap:8px;padding:11px 14px;background:var(--paper);color:var(--ink);text-transform:uppercase;font-size:11px}
.badge b i{width:8px;height:8px;background:var(--flag)}
html[lang="bn"] .badge{font-family:var(--bn-body)}
.hero h1{font-size:clamp(40px,6.1vw,88px);line-height:1.06;letter-spacing:-.025em;margin:28px 0 26px}
html[lang="bn"] .hero h1{font-weight:500}
.hero h1 .ac{color:var(--ac)}
.hero-lede{font-size:clamp(17px,1.4vw,19px);line-height:1.55;max-width:34em;color:#e4e9e6}
.ctas{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}

/* typewriter (M2): each line stacks a hidden ghost (reserves width) and the
   live typed text in one grid cell, so typing never reflows the page */
.tw-line{display:grid}
.tw-line>span{grid-area:1/1}
.tw-ghost{visibility:hidden}
.tw-cursor{display:inline-block;width:.06em;min-width:3px;height:.86em;background:var(--ac);margin-left:.06em;vertical-align:-.06em;animation:blink 1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}

/* S2 marquee (M4) */
.marquee{border-bottom:1px solid var(--line-dark);overflow:hidden;height:80px;display:flex;align-items:center;-webkit-mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent)}
.mq-track{display:flex;width:max-content;gap:64px;padding-left:64px;animation:mq 100s linear infinite}
.marquee:hover .mq-track{animation-play-state:paused}
.mq-track span{font-family:var(--mono);font-size:20px;color:var(--on-dark-dim);white-space:nowrap;transition:color .2s}
.mq-track span:hover{color:var(--on-dark)}
@keyframes mq{to{transform:translateX(calc(-50% - 32px))}}

/* sections */
.sec{padding:var(--sec) 0;position:relative}
.sec.tight-top{padding-top:24px}
.dark{background:var(--ink);color:var(--on-dark)}
.light{background:var(--paper);color:var(--ink)}
.sec-head{display:flex;justify-content:space-between;align-items:flex-end;gap:32px;margin-bottom:56px}
.sec-head.sub{margin:96px 0 40px}

/* halftone dots (M9): a dot grid shown only through soft blobs */
.dots::before{content:"";position:absolute;inset:0;pointer-events:none;background-image:radial-gradient(circle,rgba(5,7,10,.2) 1.1px,transparent 1.5px);background-size:9px 9px;-webkit-mask-image:radial-gradient(38% 30% at 96% 8%,#000 0%,transparent 100%),radial-gradient(28% 24% at 3% 62%,#000 0%,transparent 100%),radial-gradient(26% 18% at 70% 100%,#000 0%,transparent 100%);mask-image:radial-gradient(38% 30% at 96% 8%,#000 0%,transparent 100%),radial-gradient(28% 24% at 3% 62%,#000 0%,transparent 100%),radial-gradient(26% 18% at 70% 100%,#000 0%,transparent 100%)}
.dots>.wrap{position:relative}

/* S3 feature box (M5) */
.feat-box{display:grid;grid-template-columns:minmax(300px,430px) 1fr;border:1px solid var(--line-dark);min-height:540px}
.feat-rows{display:grid;grid-template-rows:repeat(4,1fr);border-right:1px solid var(--line-dark)}
.feat-rows li+li{border-top:1px solid var(--line-dark)}
.feat-rows button{width:100%;height:100%;display:flex;align-items:center;gap:18px;padding:22px 28px;text-align:left;font-size:17px;line-height:1.35;transition:background .25s,color .25s}
.feat-rows svg,.wave-cols svg,.ucols svg{width:22px;height:22px;flex:none;fill:none;stroke:var(--ac);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;transition:stroke .25s}
.feat-rows button[aria-selected="true"]{background:var(--ac);color:var(--ink)}
.feat-rows button[aria-selected="true"] svg{stroke:var(--ink)}
.feat-rows button:not([aria-selected="true"]):hover{background:#0b1410}
.feat-art{position:relative;background:var(--black);min-height:360px}
.feat-art canvas{position:absolute;inset:0;width:100%;height:100%}

/* S4 cards (M6) and prices */
.cards3{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--ink);background:rgba(255,255,255,.9)}
.cards3>*+*{border-left:1px solid var(--ink)}
.icard{padding:28px;display:flex;flex-direction:column;gap:20px;min-height:380px;cursor:default}
.icard p{font-size:17px;line-height:1.4;max-width:24em}
.icard canvas{flex:1;width:100%;min-height:240px}
.pcard{padding:28px;display:flex;flex-direction:column;gap:16px}
.pcard h3{font-size:28px}
.pcard .amt{font-family:var(--mono);font-size:22px;font-weight:500}
.pcard .amt small{font-size:11px;color:var(--on-light-dim);font-weight:400;letter-spacing:.04em}
.pcard .d{font-family:var(--mono);font-size:13px;line-height:1.6;color:var(--on-light-dim);flex:1}
.pcard .st{display:flex;align-items:center;gap:8px;font-family:var(--mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;padding-top:16px;border-top:1px solid var(--ink)}
.pcard .st i{width:7px;height:7px;background:var(--on-light-dim)}
.pcard .st i.ok{background:#12b76a;animation:pulse 2s ease-in-out infinite}
@keyframes pulse{50%{box-shadow:0 0 0 4px rgba(18,183,106,.2)}}

/* S5 split */
.split{display:grid;grid-template-columns:1fr minmax(300px,440px);gap:64px;align-items:start}
.flow{width:100%;height:400px;margin-top:24px}
.stats>div{padding:22px 0;border-bottom:1px solid var(--line-dark)}
.stats>div:first-child{padding-top:0}
.stats dt{font-size:clamp(36px,3.4vw,46px);letter-spacing:-.02em;line-height:1.1}
.stats dt .lt{color:var(--ac)}
.stats dd{color:var(--on-dark-dim);font-size:15px;margin-top:6px}

/* S6 wave (M8) */
.wave-box{border:1px solid var(--line-dark);margin-top:32px}
.wave-cols{display:grid;grid-template-columns:repeat(3,1fr);border-bottom:1px solid var(--line-dark)}
.wave-cols>div{display:flex;gap:16px;align-items:flex-start;padding:28px}
.wave-cols>div+div{border-left:1px solid var(--line-dark)}
.wave-cols b{display:block;font-weight:400;font-size:19px}
.wave-cols small{display:block;font-family:var(--mono);font-size:13px;line-height:1.6;color:var(--on-dark-dim);margin-top:8px}
.wave{width:100%;height:360px;background:var(--black)}

/* S7 models */
.mgrid{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--ink);border-left:1px solid var(--ink)}
.mcard{border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);background:rgba(255,255,255,.92);padding:22px;min-height:190px;display:flex;flex-direction:column;gap:14px;transition:background .2s}
.mcard:hover{background:#f1fdf7}
.mtop{display:flex;justify-content:space-between;align-items:flex-start}
.glyph{width:40px;height:40px;background:var(--ink);color:var(--ac);display:grid;place-items:center;font-family:var(--pixel);font-size:16px}
.glyph[lang="bn"]{font-family:var(--bn-display);font-size:13px;width:auto;padding:0 8px}
.flag{background:var(--ink);color:var(--ac);font-family:var(--mono);font-size:10px;letter-spacing:.06em;text-transform:uppercase;padding:5px 8px}
.mcard h3{font-size:20px;flex:1}
.mbot{display:flex;justify-content:flex-end}
.tag{font-family:var(--mono);font-size:10px;text-transform:uppercase;letter-spacing:.06em;border:1px solid var(--line-light);padding:4px 8px;white-space:nowrap}
.tag::before{content:"· "}

/* S8 use cases */
.ucols{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--line-dark);margin-top:44px}
.ucols article{padding:28px;display:flex;flex-direction:column;gap:20px}
.ucols article+article{border-left:1px solid var(--line-dark)}
.ucols h3{display:flex;gap:10px;align-items:center;font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase}
html[lang="bn"] .ucols h3{font-family:var(--bn-display);font-size:16px;letter-spacing:0;text-transform:none}
.ucols p{font-family:var(--mono);font-size:13px;line-height:1.65;color:var(--on-dark-dim)}
.ucols ul{display:grid;gap:10px}
.ucols li{font-family:var(--mono);font-size:12.5px;display:flex;gap:10px;align-items:baseline}
.ucols li::before{content:"";width:6px;height:6px;background:var(--ac);flex:none;transform:translateY(-1px)}

/* S9 credits */
.credits{padding:24px 0 var(--sec)}
.credits-in{display:grid;grid-template-columns:minmax(260px,360px) 1fr;gap:64px;align-items:center}
.credits p{font-family:var(--mono);font-size:13px;line-height:1.6;color:var(--on-dark-dim);margin-top:12px}
.cells{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--line-dark)}
.cells a{padding:26px 24px;display:flex;flex-direction:column;gap:6px;transition:background .2s}
.cells a+a{border-left:1px solid var(--line-dark)}
.cells a:hover{background:#0b1410}
.cells b{font-weight:400;font-size:17px}
.cells small{font-family:var(--mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--ac)}

/* S10 FAQ (M11) */
.faq{background:var(--smoke)}
.faq-in{display:grid;grid-template-columns:minmax(240px,360px) 1fr;gap:64px}
.faq-in>div:first-child p{font-family:var(--mono);font-size:13px;line-height:1.6;color:var(--on-dark-dim);margin-top:14px}
.qa{border-bottom:1px solid #2c3136}
.qa button{width:100%;display:flex;justify-content:space-between;align-items:center;gap:24px;padding:22px 0;text-align:left;font-size:19px}
.qa button i{width:10px;height:10px;border-right:1.5px solid var(--on-dark-dim);border-bottom:1.5px solid var(--on-dark-dim);transform:rotate(45deg) translateY(-3px);transition:transform .3s;flex:none}
.qa.open button i{transform:rotate(-135deg) translateY(-3px)}
.ans{display:grid;grid-template-rows:0fr;transition:grid-template-rows .35s ease}
.qa.open .ans{grid-template-rows:1fr}
.ans>div{overflow:hidden}
.ans p{font-family:var(--mono);font-size:13.5px;line-height:1.7;color:var(--on-dark-dim);max-width:52em;padding-bottom:22px}

/* S11 CTA (M12) */
.cta{position:relative;background:var(--ac);color:var(--ink);min-height:640px;display:flex;align-items:center;overflow:hidden;isolation:isolate}
.hills{position:absolute;left:0;right:0;bottom:0;width:100%;height:58%;z-index:-1}
.cta-in{text-align:center;padding-bottom:200px}
.cta .btn-line-ink{background:var(--ac)}
.cta h2{font-size:clamp(34px,3.8vw,52px)}
.cta .ctas{justify-content:center}

/* S12 footer */
.foot{background:var(--ink);padding-top:80px;overflow:hidden}
.foot-top{display:grid;grid-template-columns:repeat(4,minmax(120px,1fr)) minmax(280px,1.6fr);gap:40px}
.foot h4{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--on-dark-dim);font-weight:400;margin-bottom:16px}
.foot nav a{display:block;font-size:14px;padding:5px 0;opacity:.9}
.foot nav a:hover{color:var(--ac)}
.news .news-h{font-family:var(--display);font-size:28px;color:var(--on-dark);text-transform:none;letter-spacing:-.01em;margin-bottom:16px}
.news .row{display:flex;gap:8px;margin-bottom:8px}
.news label{flex:1;display:block}
.news input{width:100%;background:transparent;border:1px solid var(--line-dark);color:var(--on-dark);font:12px var(--mono);padding:12px 14px;border-radius:0}
.news input:focus{border-color:var(--ac);outline:none}
.news .ok-msg{font-family:var(--mono);font-size:12px;color:var(--ac);margin-top:6px}
.addr{font-family:var(--mono);font-size:11px;color:var(--on-dark-dim);margin-top:10px}
.foot-bot{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-top:72px}
.legal{font-family:var(--mono);font-size:11px;color:var(--on-dark-dim);display:grid;gap:8px;padding-bottom:40px}
.legal a{text-decoration:underline;text-underline-offset:3px}
.giant{font-weight:600;font-size:clamp(90px,14vw,200px);line-height:.78;letter-spacing:-.04em;margin-bottom:-.05em;user-select:none}

/* reveal on scroll */
.rv{opacity:0;transform:translateY(16px);transition:opacity .7s ease,transform .7s ease}
.rv.in{opacity:1;transform:none}

/* responsive */
@media (max-width:1100px){
  .links{display:none}
  .burger{display:block}
  .split{grid-template-columns:1fr;gap:40px}
  .foot-top{grid-template-columns:repeat(2,1fr)}
  .news{grid-column:1/-1}
  .mgrid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:860px){
  .sec-head{flex-direction:column;align-items:flex-start;margin-bottom:36px}
  /* the canvas sits above the rows that drive it, so a tap shows its effect */
  .feat-box{grid-template-columns:1fr}
  .feat-art{order:-1;min-height:300px;border-bottom:1px solid var(--line-dark)}
  .feat-rows{border-right:0}
  .feat-rows button{padding:18px 20px;font-size:16px}
  .cards3,.ucols,.cells,.wave-cols{grid-template-columns:1fr}
  .cards3>*+*,.ucols article+article,.cells a+a,.wave-cols>div+div{border-left:0;border-top:1px solid var(--line-dark)}
  .cards3>*+*{border-top-color:var(--ink)}
  .icard{min-height:0;gap:12px}
  .icard canvas{flex:none;height:200px;min-height:0}
  .credits-in,.faq-in{grid-template-columns:1fr;gap:28px}
  .flow{height:300px}
  .wave{height:260px}
  .cta{min-height:560px}
  .foot-bot{flex-direction:column;align-items:stretch;gap:28px}
  .legal{padding-bottom:0}
}
@media (max-width:560px){
  .hide-s{display:none}
  .announce{font-size:11px;padding:6px 16px}
  .announce .long{display:none}
  .announce .short{display:inline}
  .hero-in{padding-top:36px;padding-bottom:48px}
  .hero h1{margin:22px 0 18px}
  html[lang="bn"] .hero h1{font-size:33px}
  .badge{flex-wrap:wrap;font-size:11px}
  .badge>span,.badge b{padding:9px 10px}
  .ctas .btn{flex:1 1 100%;justify-content:center}
  .sec-head{margin-bottom:28px}
  .sec-head.sub{margin:64px 0 28px}
  .feat-art{min-height:260px}
  .wave-cols>div{padding:18px 20px}
  .icard,.pcard{padding:22px}
  .mgrid{grid-template-columns:1fr 1fr}
  .mcard{min-height:150px;padding:16px 14px;gap:10px}
  .mcard h3{font-size:16px;line-height:1.25}
  .glyph{width:34px;height:34px;font-size:14px}
  .flag{font-size:9px;padding:4px 6px}
  .cta{min-height:520px}
  .cta h2{font-size:30px}
  .cta-in{padding-bottom:180px}
  .foot{padding-top:56px}
  .foot-top{grid-template-columns:1fr 1fr;gap:28px}
  .news .row{flex-direction:column}
  .news .btn{justify-content:center}
  .nav-act .btn-ac{display:none}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
  .mq-track{animation:none}
  .rv{opacity:1;transform:none}
}