:root{--bg:#FFF7ED;--ink:#2A1512;--muted:#7A5A50;--line:#EBD3C0;--panel:#FFEBD6;--hero:var(--brand,#E8531C);--accent:#B8760A;--on-hero:#fff;color-scheme:light;
  box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){color-scheme:dark;--bg:#14090A;--ink:#FFF7ED;--muted:#C9ADA0;--line:#3A2220;--panel:#201112;--accent:#FFD166;--on-hero:#14090A}}
:root[data-theme="dark"]{color-scheme:dark;--bg:#14090A;--ink:#FFF7ED;--muted:#C9ADA0;--line:#3A2220;--panel:#201112;--accent:#FFD166;--on-hero:#14090A}
*,*::before,*::after{box-sizing:inherit}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:400 17px/1.7 "Hind Siliguri",system-ui,sans-serif;overflow-x:hidden}
h1,h2,h3{font-family:"Anek Bangla","Hind Siliguri",sans-serif;line-height:1.25;margin:0}
a{color:inherit}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}
.btn{display:inline-block;background:var(--hero);color:var(--on-hero);font:700 18px/1 "Anek Bangla",sans-serif;padding:16px 26px;border-radius:999px;text-decoration:none;border:0;cursor:pointer;transition:transform .15s,box-shadow .2s}
.btn:hover{transform:translateY(-2px);box-shadow:0 10px 24px color-mix(in srgb,var(--hero) 40%,transparent)}
.btn.sm{padding:11px 18px;font-size:15px}
.btn.ghost{background:none;color:var(--ink);border:2px solid var(--line);box-shadow:none}
:is(.btn,summary,input,a,button):focus-visible{outline:3px solid var(--accent);outline-offset:3px}
.announce{background:var(--hero);color:var(--on-hero);text-align:center;padding:8px 16px;font-weight:600;font-size:15px}
header{display:flex;justify-content:space-between;align-items:center;padding:16px 0}
.logo img{height:42px;width:auto;display:block}
.ll{display:block}.ld{display:none}
:root[data-theme="dark"] .ll{display:none}:root[data-theme="dark"] .ld{display:block}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .ll{display:none}:root:not([data-theme="light"]) .ld{display:block}}
.hr{display:flex;gap:10px;align-items:center}
.icon{width:42px;height:42px;border-radius:50%;border:1px solid var(--line);background:none;color:var(--ink);font-size:19px;cursor:pointer}

.hero{position:relative;display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;padding:44px 0 72px}
.hero>*{position:relative;z-index:1}
.hero h1{font-size:clamp(34px,6vw,60px);font-weight:800;letter-spacing:-.5px}
.hero h1 span{display:block}
.hero .hl{color:var(--hero)}
.sub{font-size:19px;color:var(--muted);max-width:30em;margin:18px 0 28px}
.cta{display:flex;gap:12px;flex-wrap:wrap}
.tag{margin-top:22px;color:var(--accent);font:700 16px "Anek Bangla",sans-serif}
.speed{position:absolute;left:-60px;height:5px;border-radius:5px;background:var(--hero);opacity:0;z-index:0;animation:dash 5s ease-in-out infinite}
.s1{top:22%;width:160px}.s2{top:30%;width:100px;animation-delay:1.6s}.s3{top:76%;width:140px;animation-delay:3.1s}
@keyframes dash{0%{transform:translateX(0);opacity:0}15%{opacity:.35}60%{opacity:.2}100%{transform:translateX(110vw);opacity:0}}

.feed{background:var(--panel);border:1px solid var(--line);border-radius:22px;padding:22px 22px 70px;min-height:340px;position:relative;overflow:hidden}
.feed h3{font-size:15px;color:var(--muted);font-weight:500;margin-bottom:14px}
.order{display:flex;justify-content:space-between;align-items:center;gap:12px;background:var(--bg);border:1px solid var(--line);border-radius:14px;padding:12px 16px;margin-bottom:10px;animation:drop .6s cubic-bezier(.2,.8,.2,1) both}
.order small{display:block;color:var(--muted);font-size:13px;line-height:1.3}
.order strong{font-family:"Anek Bangla",sans-serif;font-size:17px}
.order .p{color:var(--hero);font:800 19px "Anek Bangla",sans-serif;white-space:nowrap}
@keyframes drop{from{opacity:0;transform:translateY(-22px) scale(.97)}to{opacity:1;transform:none}}
.total{position:absolute;left:22px;right:22px;bottom:18px;border-top:1px dashed var(--line);padding-top:12px;display:flex;justify-content:space-between;align-items:baseline}
.total b{font:800 30px "Anek Bangla",sans-serif;color:var(--accent)}
.note{font-size:13px;color:var(--muted)}

section{padding:64px 0;border-top:1px solid var(--line)}
h2{font-size:clamp(26px,4vw,38px);font-weight:800;margin-bottom:10px}
.lead{color:var(--muted);max-width:36em;margin:0 0 34px}
.facts{padding:34px 0}
.facts ul{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.facts li{display:flex;gap:12px;align-items:flex-start}
.facts svg{flex:none;width:34px;height:34px;fill:none;stroke:var(--hero);stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.facts svg circle{stroke-dasharray:63;stroke-dashoffset:63}.facts svg path{stroke-dasharray:20;stroke-dashoffset:20}
.facts li.in svg circle{animation:draw .8s ease forwards calc(var(--i)*.12s)}.facts li.in svg path{animation:draw .5s ease forwards calc(.5s + var(--i)*.12s)}
@keyframes draw{to{stroke-dashoffset:0}}
.facts strong{display:block;font:700 18px "Anek Bangla",sans-serif;line-height:1.3}
.facts span{color:var(--muted);font-size:15px;line-height:1.5;display:block;margin-top:3px}

.stepline{height:4px;background:var(--line);border-radius:4px;margin-bottom:26px;overflow:hidden}
.stepline i{display:block;height:100%;width:100%;background:var(--hero);transform-origin:left;transform:scaleX(var(--p,0))}
.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);counter-reset:s}
.steps li{counter-increment:s;padding-right:20px}
.steps li::before{content:counter(s,bengali);display:flex;width:44px;height:44px;border-radius:50%;background:var(--hero);color:var(--on-hero);font:800 20px "Anek Bangla",sans-serif;align-items:center;justify-content:center;margin-bottom:14px}
.steps h3{font-size:19px;margin-bottom:4px}.steps p{margin:0;color:var(--muted);font-size:15.5px;line-height:1.6}

.feat{display:grid;grid-template-columns:1fr 1fr;gap:0 48px;margin:0}
.feat div{padding:18px 0;border-bottom:1px solid var(--line)}
.feat dt{font:700 19px "Anek Bangla",sans-serif;margin-bottom:2px}.feat dd{margin:0;color:var(--muted);font-size:16px}

.calc{display:grid;grid-template-columns:1fr 1fr;gap:32px;background:var(--panel);border:1px solid var(--line);border-radius:22px;padding:30px}
.calc label{display:block;font-weight:600;margin-bottom:16px}
.calc input{width:100%;font:600 18px "Hind Siliguri",sans-serif;padding:11px 14px;border:1px solid var(--line);border-radius:10px;background:var(--bg);color:var(--ink);margin-top:5px}
.res{display:flex;flex-direction:column;justify-content:center}
.big{font:800 clamp(38px,7vw,58px)/1.1 "Anek Bangla",sans-serif;color:var(--hero)}

details{border-bottom:1px solid var(--line);padding:16px 0}
summary{cursor:pointer;font:700 19px "Anek Bangla",sans-serif;list-style:none;display:flex;justify-content:space-between;gap:16px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";color:var(--hero);font-size:26px;line-height:1;transition:transform .2s}
details[open] summary::after{transform:rotate(45deg)}
details p{margin:10px 0 0;color:var(--muted)}
.final{text-align:center;padding:80px 0}
.final h2{font-size:clamp(28px,5vw,46px);margin-bottom:12px}
.final p{color:var(--muted);margin:0 auto 28px;max-width:30em}
footer{border-top:1px solid var(--line);padding:26px 0 96px;color:var(--muted);font-size:14px;text-align:center}

.fab{position:fixed;right:18px;bottom:calc(18px + env(safe-area-inset-bottom,0px));z-index:6;display:flex;align-items:center;gap:8px;background:#0084FF;color:#fff;text-decoration:none;font:700 15px "Anek Bangla",sans-serif;padding:12px 16px;border-radius:999px;box-shadow:0 8px 22px rgba(0,0,0,.3);animation:ring 2.4s ease-out 1.5s 3}
.fab svg{width:26px;height:26px}
@keyframes ring{0%{box-shadow:0 0 0 0 rgba(0,132,255,.55),0 8px 22px rgba(0,0,0,.3)}100%{box-shadow:0 0 0 22px rgba(0,132,255,0),0 8px 22px rgba(0,0,0,.3)}}
.sticky{display:none}

.js .rv{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease;transition-delay:calc(var(--i,0)*90ms)}
.js .rv.in{opacity:1;transform:none}

@media (max-width:820px){
  .hero{grid-template-columns:1fr;padding-top:20px}
  .facts ul{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr 1fr;gap:30px 0}.stepline{display:none}
  .feat,.calc{grid-template-columns:1fr}.calc{padding:22px}
  .sticky{display:block;position:fixed;left:14px;right:84px;bottom:calc(18px + env(safe-area-inset-bottom,0px));z-index:5;text-align:center;box-shadow:0 8px 24px rgba(0,0,0,.28)}
  .fab span{display:none}.fab{padding:12px}
  header .btn{display:none}
}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}html{scroll-behavior:auto}.js .rv{opacity:1;transform:none}.facts svg circle,.facts svg path{stroke-dashoffset:0}}