:root{
  color-scheme:only light;
  --pista:#123A30; --pista-2:#1B4A3D; --pista-3:#2A5E4F;
  --gold:#E6B75A; --gold-soft:#F4DCA6;
  --glaze:#D23C55; --glaze-dk:#AE2840;
  --cocoa:#2B1A14; --cocoa-2:#6E534A;
  --icing:#FFF8F4; --blush:#F7E5DF; --line:#EBD5CC;
  --serif:"Noto Serif Bengali",serif; --sans:"Hind Siliguri",system-ui,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
html,body{overflow-x:clip}
body{font-family:var(--sans);font-size:17px;line-height:1.75;color:var(--cocoa);background:var(--icing);-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%;height:auto}
a{color:inherit}
button{font:inherit;cursor:pointer}
:focus-visible{outline:3px solid var(--gold);outline-offset:3px;border-radius:6px}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
h1,h2,h3{font-family:var(--serif);font-weight:700;line-height:1.3;letter-spacing:0}
h2{font-size:clamp(26px,4.2vw,38px)}
.lede{color:var(--cocoa-2);max-width:34em}

/* ---------- offer strip ---------- */
.strip{background:var(--glaze);color:#fff;font-size:15px;text-align:center;padding:8px 16px;line-height:1.5}
.strip b{font-weight:700}
.strip .clock{display:inline-flex;gap:4px;margin-left:6px;font-variant-numeric:tabular-nums}
.strip .clock span{background:rgba(0,0,0,.18);border-radius:4px;padding:0 6px;font-weight:600}

/* ---------- hero ---------- */
.hero{background:var(--pista);color:#F6EFE3;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:
  radial-gradient(600px 380px at 78% 40%,rgba(230,183,90,.16),transparent 70%);pointer-events:none}
.hero .wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center;padding-top:36px;padding-bottom:72px;position:relative}
.brand{display:flex;align-items:center;gap:10px;font-size:14px;color:#cfe0d8;margin-bottom:34px}
.brand img{width:34px;height:34px}
.hero h1{font-size:clamp(40px,6.4vw,70px);line-height:1.18;color:var(--gold);font-weight:800}
.hero h1 small{display:block;font-size:.5em;color:#F6EFE3;font-weight:600;margin-bottom:6px}
.hero p.lede{color:#cfe0d8;margin:20px 0 28px;font-size:18px}
.facts{display:flex;flex-wrap:wrap;gap:10px 26px;margin-top:26px;font-size:15px;color:#cfe0d8}
.facts div{display:flex;gap:8px;align-items:baseline}
.facts strong{font-family:var(--serif);font-size:22px;color:#fff}

.cta{display:inline-flex;align-items:center;gap:12px;background:var(--glaze);color:#fff;text-decoration:none;font-weight:700;font-size:19px;padding:15px 28px;border-radius:999px;border:0;box-shadow:0 6px 0 var(--glaze-dk);transition:transform .12s,box-shadow .12s}
.cta:hover{transform:translateY(2px);box-shadow:0 4px 0 var(--glaze-dk)}
.cta:active{transform:translateY(6px);box-shadow:0 0 0 var(--glaze-dk)}
.cta s{opacity:.7;font-weight:500;font-size:16px}
.hero .assure{font-size:14px;color:#9fbcb0;margin-top:16px}

/* the book */
.stage{position:relative;height:520px;perspective:1600px}
.book{position:absolute;left:50%;top:50%;width:300px;height:424px;
  transform:translate(-50%,-50%) perspective(1400px) rotateY(-16deg) rotateX(3deg);animation:arrive 1.1s cubic-bezier(.2,.8,.2,1) both}
.book .front{position:absolute;inset:0;border-radius:2px 6px 6px 2px;overflow:hidden;
  box-shadow:1px 1px 0 #f7f0e4,2px 2px 0 #ddd0bc,3px 3px 0 #f7f0e4,4px 4px 0 #ddd0bc,5px 5px 0 #f7f0e4,6px 6px 0 #ddd0bc,7px 7px 0 #f7f0e4,8px 8px 0 #c9b9a2,
    26px 34px 46px -8px rgba(0,0,0,.55)}
.book .front::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(0,0,0,.35) 0,rgba(255,255,255,.12) 2.2%,transparent 5%,transparent 70%,rgba(255,255,255,.07))}
.book .front img{width:100%;height:100%;object-fit:cover}
@keyframes arrive{from{opacity:0;transform:translate(-50%,-42%) perspective(1400px) rotateY(-40deg) rotateX(10deg)}}

.seal{position:absolute;right:4%;top:6%;width:148px;height:148px;display:grid;place-items:center;text-align:center;color:var(--cocoa);
  animation:stamp .5s .85s cubic-bezier(.3,1.6,.5,1) both;z-index:3}
.seal svg{position:absolute;inset:0;width:100%;height:100%}
.seal div{position:relative;line-height:1.1;font-family:var(--serif)}
.seal s{font-size:18px;color:var(--glaze-dk);font-weight:600}
.seal b{display:block;font-size:44px;font-weight:800}
.seal i{font-style:normal;font-family:var(--sans);font-size:13px;font-weight:600}
@keyframes stamp{from{opacity:0;transform:scale(1.7) rotate(-30deg)}to{opacity:1;transform:scale(1) rotate(-10deg)}}
.seal{transform:rotate(-10deg)}

/* ---------- page fan ---------- */
.fan{padding:84px 0 40px}
.fan header{display:flex;justify-content:space-between;align-items:end;gap:20px;flex-wrap:wrap}
.fan header p{color:var(--cocoa-2);font-size:15px}
.deck{display:flex;gap:0;overflow-x:auto;scroll-snap-type:x mandatory;padding:34px 20px 46px;margin-top:6px;scrollbar-width:none}
.deck::-webkit-scrollbar{display:none}
.deck button{flex:0 0 auto;width:min(56vw,290px);margin-right:-34px;border:0;background:none;padding:0;scroll-snap-align:center;
  transform:rotate(var(--r));transition:transform .25s,margin .25s;position:relative}
.deck button img{border-radius:4px;box-shadow:0 1px 0 var(--line),0 18px 30px -14px rgba(43,26,20,.45);background:#fff}
.deck button:hover,.deck button:focus-visible{transform:rotate(0) translateY(-14px);z-index:5;margin-right:6px}
.deck button span{position:absolute;left:0;right:0;bottom:-30px;font-size:14px;color:var(--cocoa-2);text-align:center}
.deck-pad{flex:0 0 40px}

/* ---------- anatomy ---------- */
.anatomy{background:var(--blush);padding:84px 0}
.anatomy .wrap{display:grid;grid-template-columns:minmax(0,520px) 1fr;gap:56px;align-items:center}
.page{position:relative;background:#fff;border-radius:4px;box-shadow:0 24px 40px -22px rgba(43,26,20,.5)}
.pin{position:absolute;width:30px;height:30px;border-radius:50%;background:var(--glaze);color:#fff;font-weight:700;font-size:15px;
  display:grid;place-items:center;box-shadow:0 0 0 5px rgba(210,60,85,.22);border:0}
.pin.on{background:var(--pista);box-shadow:0 0 0 6px rgba(18,58,48,.25)}
.legend{list-style:none;margin-top:26px;display:grid;gap:4px}
.legend li{display:grid;grid-template-columns:30px 1fr;gap:14px;padding:12px 14px;border-radius:12px;cursor:default;transition:background .2s}
.legend li.on{background:#fff}
.legend li>b{width:30px;height:30px;border-radius:50%;background:var(--glaze);color:#fff;display:grid;place-items:center;font-size:15px}
.legend h3{font-size:19px;margin-bottom:2px}
.legend p{color:var(--cocoa-2);font-size:16px;line-height:1.6}

/* ---------- 100 wall ---------- */
.wall{padding:88px 0 70px}
.wall .count{font-family:var(--serif);font-weight:800;font-size:clamp(90px,16vw,170px);line-height:.9;color:var(--pista)}
.wall-head{display:grid;grid-template-columns:auto 1fr;gap:28px;align-items:end;margin-bottom:34px}
.filters{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:26px}
.filters button{border:1.5px solid var(--line);background:#fff;border-radius:999px;padding:5px 14px;font-size:15px;color:var(--cocoa)}
.filters button[aria-pressed=true]{background:var(--pista);border-color:var(--pista);color:#fff}
.names{font-family:var(--serif);font-size:clamp(18px,2.3vw,23px);line-height:2;font-weight:600;color:var(--cocoa)}
.names span{white-space:nowrap;transition:opacity .2s,color .2s}
.names span sup{font-family:var(--sans);font-size:12px;color:var(--cocoa-2);font-weight:500;margin-right:3px;vertical-align:4px}
.names span::after{content:"";display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--dot);margin:0 14px 3px 12px}
.names span.dim{opacity:.18}
.names.clip{max-height:15em;overflow:hidden;-webkit-mask-image:linear-gradient(#000 65%,transparent)}
.more{margin-top:14px;background:none;border:0;color:var(--glaze-dk);font-weight:700;text-decoration:underline;text-underline-offset:4px}

/* ---------- for whom ---------- */
.who{background:var(--pista);color:#F6EFE3;padding:84px 0}
.who h2{color:var(--gold)}
.who-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin-top:40px;border-top:1px solid var(--pista-3)}
.who-grid div{padding:28px 28px 8px 0}
.who-grid div+div{padding-left:28px;border-left:1px solid var(--pista-3)}
.who-grid h3{font-size:21px;color:#fff;margin-bottom:8px}
.who-grid p{color:#b8cfc5;font-size:16px}

/* ---------- price math ---------- */
.math{padding:84px 0 20px}
.math .wrap{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center}
.eq{font-family:var(--serif);font-weight:700;font-size:clamp(24px,3.2vw,38px);display:flex;align-items:center;gap:.45em;line-height:1.2}
.eq .over{text-align:center;white-space:nowrap}
.eq .over b{display:block;padding:0 .3em .25em;border-bottom:3px solid var(--cocoa)}
.eq .over i{display:block;font-style:normal;padding-top:.25em}
.eq .res{white-space:nowrap}
.eq em{display:block;font-style:normal;color:var(--glaze);font-size:1.25em}

/* ---------- order slip ---------- */
.order{padding:70px 0 100px}
.order .wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;align-items:start}
.steps{list-style:none;counter-reset:s;margin-top:26px;display:grid;gap:22px}
.steps li{counter-increment:s;display:grid;grid-template-columns:44px 1fr;gap:14px}
.steps li::before{content:counter(s,bengali);width:44px;height:44px;border-radius:50%;border:2px solid var(--pista);color:var(--pista);
  font-family:var(--serif);font-weight:700;font-size:20px;display:grid;place-items:center;line-height:1}
.steps h3{font-size:19px}
.steps p{color:var(--cocoa-2);font-size:16px}
.payto{margin-top:30px;background:var(--pista);color:#fff;border-radius:16px;padding:20px 22px}
.payto small{color:#b8cfc5;font-size:14px}
.payto .num{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:4px 0 8px}
.payto .num b{font-size:28px;letter-spacing:.04em;font-variant-numeric:tabular-nums}
.copy{background:var(--gold);color:var(--cocoa);border:0;border-radius:999px;padding:6px 16px;font-weight:700;font-size:15px}
.payto p{font-size:15px;color:#d9e6e0}

.slip{background:#fff;position:relative;padding:34px 30px 30px;border-radius:4px;box-shadow:0 26px 50px -30px rgba(43,26,20,.55)}
.slip::before,.slip::after{content:"";position:absolute;left:0;right:0;height:14px;
  background:radial-gradient(circle at 7px 0,var(--icing) 6px,transparent 6.5px) 0 0/14px 14px repeat-x}
.slip::before{top:0}
.slip::after{bottom:0;transform:scaleY(-1)}
.slip-head{display:flex;justify-content:space-between;align-items:start;border-bottom:2px dashed var(--line);padding-bottom:16px;margin-bottom:20px}
.slip-head h3{font-size:22px}
.slip-head p{font-size:14px;color:var(--cocoa-2)}
.slip-head .amt{text-align:right;font-family:var(--serif);line-height:1.2}
.slip-head .amt s{color:var(--cocoa-2);font-size:16px}
.slip-head .amt b{display:block;font-size:34px;color:var(--glaze)}
.field{margin-bottom:16px}
.field label{display:block;font-weight:600;font-size:15px;margin-bottom:5px}
.field label span{font-weight:400;color:var(--cocoa-2)}
.field input{width:100%;font:inherit;font-size:17px;border:1.5px solid var(--line);border-radius:10px;padding:11px 14px;background:var(--icing);color:var(--cocoa)}
.field input:focus{outline:none;border-color:var(--pista);background:#fff;box-shadow:0 0 0 3px rgba(18,58,48,.15)}
.two{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.methods{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.methods label{margin:0}
.methods input{position:absolute;opacity:0}
.methods span{display:block;text-align:center;border:1.5px solid var(--line);border-radius:10px;padding:10px 6px;font-weight:700;font-size:16px;background:var(--icing)}
.methods input:checked+span{border-color:var(--m);background:var(--m);color:#fff}
.methods input:focus-visible+span{outline:3px solid var(--gold);outline-offset:2px}
.coupon{font-size:15px;margin:-4px 0 16px}
.coupon summary{cursor:pointer;color:var(--glaze-dk);font-weight:600}
.coupon div{display:flex;gap:8px;margin-top:8px}
.coupon input{flex:1;font:inherit;border:1.5px solid var(--line);border-radius:10px;padding:8px 12px}
.coupon button{border:0;background:var(--cocoa);color:#fff;border-radius:10px;padding:0 16px;font-weight:600}
.slip .cta{width:100%;justify-content:center;margin-top:6px}
.fine{font-size:14px;color:var(--cocoa-2);text-align:center;margin-top:14px;line-height:1.6}

/* ---------- faq ---------- */
.faq{background:var(--blush);padding:80px 0}
.faq .wrap{max-width:780px}
.faq details{border-bottom:1px solid var(--line);padding:18px 0}
.faq summary{font-weight:700;font-size:18px;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:26px;line-height:1;color:var(--glaze);transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{color:var(--cocoa-2);margin-top:8px}

footer{background:var(--cocoa);color:#d9c9c2;font-size:15px;padding:44px 0 110px}
footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:20px}
footer a{color:#fff}
footer .credit{flex-basis:100%;font-size:13px;color:#a8928a;border-top:1px solid #45302a;padding-top:18px}

/* sticky bar */
.bar{position:fixed;left:0;right:0;bottom:0;z-index:20;background:#fff;border-top:1px solid var(--line);display:none;align-items:center;justify-content:space-between;gap:12px;padding:10px 16px calc(10px + env(safe-area-inset-bottom))}
.bar .p{font-family:var(--serif);line-height:1.15}
.bar .p s{font-size:14px;color:var(--cocoa-2)}
.bar .p b{display:block;font-size:24px;color:var(--glaze)}
.bar .cta{font-size:17px;padding:12px 22px}

/* lightbox */
dialog{border:0;padding:0;background:transparent;max-width:min(94vw,760px);margin:auto}
dialog::backdrop{background:rgba(20,12,9,.82)}
dialog img{max-height:88vh;width:auto;border-radius:4px}
dialog button{position:absolute;top:-14px;right:-14px;width:40px;height:40px;border-radius:50%;border:0;background:#fff;font-size:22px}

@media (max-width:880px){
  body{font-size:16px}
  .hero .wrap{grid-template-columns:1fr;padding-top:22px;padding-bottom:54px;gap:4px}
  .brand{margin-bottom:22px}
  .hero-text{display:contents}
  .brand{order:1}.hero h1{order:2}.stage{order:3}.hero p.lede{order:4}.hero .cta{order:5;justify-self:start}.hero .assure{order:6}.facts{order:7}
  .stage{height:300px;margin:4px 0 0}
  .hero p.lede{margin:8px 0 22px}
  .book{width:180px;height:255px}
    .seal{width:108px;height:108px;right:4%;top:2%}
  .seal b{font-size:30px}.seal s{font-size:14px}.seal i{font-size:12px}
  .hero h1 small{font-size:.48em}
  .anatomy .wrap,.math .wrap,.order .wrap{grid-template-columns:1fr;gap:34px}
  .who-grid{grid-template-columns:1fr}
  .who-grid div,.who-grid div+div{padding:22px 0 0;border-left:0;border-top:1px solid var(--pista-3)}
  .who-grid div:first-child{border-top:0}
  .wall-head{grid-template-columns:1fr;gap:6px}
  .bar{display:flex}
  .slip{padding:30px 18px 26px}
  .order{padding-bottom:70px}
}
@media (max-width:420px){ .two{grid-template-columns:1fr;gap:0} }
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

/* ---------- live-site additions ---------- */
.field.err input{border-color:var(--glaze);background:#fff5f6}
.field .msg{display:none;color:var(--glaze-dk);font-size:14px;margin-top:4px;line-height:1.5}
.field.err .msg{display:block}
.form-error{display:none;background:#fde8eb;color:var(--glaze-dk);border-radius:10px;padding:10px 14px;font-size:15px;margin-bottom:14px;line-height:1.55}
.form-error.on{display:block}
.slip .cta[disabled]{opacity:.7;cursor:progress;transform:none;box-shadow:0 6px 0 var(--glaze-dk)}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.coupon .ok{color:var(--pista);font-weight:600;margin-top:6px}
.coupon .bad{color:var(--glaze-dk);margin-top:6px}
.slip-head .amt .disc{display:block;font-family:var(--sans);font-size:13px;color:var(--pista);font-weight:600}
.payto .num b.unset{font-size:18px;letter-spacing:0;color:var(--gold-soft)}
.paylist{display:grid;gap:4px}
.closed{background:#fff;border-radius:16px;padding:28px;text-align:center;box-shadow:0 26px 50px -30px rgba(43,26,20,.55)}
.closed h3{font-size:22px;margin-bottom:6px}
.strip[hidden]{display:none}

@media (max-width:880px){.pin{width:26px;height:26px;font-size:13px;margin:2px}}