:root{--ink:#071a2b;--navy:#0b3b64;--teal:#087e8b;--mint:#41d3bd;--gold:#ffd166;--paper:#f7fafc;--muted:#5c7380;--line:#d9e4ea;--white:#fff}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:system-ui,-apple-system,"Noto Sans Bengali","Noto Sans","Segoe UI",sans-serif;line-height:1.65}
a{color:inherit}.wrap{width:min(1120px,calc(100% - 36px));margin:auto}.topbar{position:sticky;top:0;z-index:50;background:rgba(247,250,252,.94);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav{height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:11px;text-decoration:none;font-weight:900}.brand img{width:42px;height:42px}.navlinks{display:flex;gap:22px;align-items:center;font-weight:800;font-size:14px}.navlinks a{text-decoration:none;color:#294352}.navlinks a:hover{color:var(--teal)}
.hero{background:radial-gradient(circle at 85% 15%,rgba(65,211,189,.18),transparent 30%),linear-gradient(135deg,#061522,#0b3b64 62%,#087e8b);color:white;padding:92px 0 86px}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:60px;align-items:center}.eyebrow{font-size:12px;letter-spacing:.12em;text-transform:uppercase;font-weight:900;color:#9bf6ed}
h1{font-size:clamp(44px,6vw,72px);line-height:1.04;letter-spacing:-.045em;margin:16px 0 22px}.hero p{font-size:19px;color:#d5e9ee;max-width:760px}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}.btn{display:inline-flex;align-items:center;justify-content:center;padding:13px 18px;border-radius:12px;text-decoration:none;font-weight:900;border:1px solid transparent}.btn-primary{background:var(--gold);color:var(--ink)}.btn-ghost{border-color:rgba(255,255,255,.28);background:rgba(255,255,255,.07);color:white}
.hero-art{display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:end}.mini-book{background:white;border-radius:10px;padding:12px;box-shadow:0 24px 70px rgba(0,0,0,.28);transform:rotate(2deg)}.mini-book img{width:100%;display:block;border-radius:5px}.coming{border:1px dashed rgba(255,255,255,.35);border-radius:16px;padding:24px;color:#d8eef2;min-height:230px;display:flex;flex-direction:column;justify-content:center;background:rgba(255,255,255,.05)}
section{padding:78px 0}.section-head{max-width:760px;margin-bottom:34px}.kicker{font-size:12px;letter-spacing:.12em;text-transform:uppercase;font-weight:900;color:var(--teal)}h2{font-size:clamp(30px,4vw,48px);line-height:1.12;letter-spacing:-.035em;margin:10px 0 14px}.lead{font-size:18px;color:var(--muted)}
.catalog{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.book-card{background:white;border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:0 12px 42px rgba(8,42,64,.06);display:flex;flex-direction:column}.cover-area{background:linear-gradient(145deg,#e9f4f7,#f9fbfc);padding:28px;display:grid;place-items:center;min-height:390px}.cover-area img{width:min(210px,80%);border-radius:4px;box-shadow:0 18px 40px rgba(6,29,44,.22)}.book-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1}.tag{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--teal);font-weight:900}.book-body h3{font-size:22px;line-height:1.25;margin:0}.book-body p{color:var(--muted);margin:0}.meta{display:flex;gap:8px;flex-wrap:wrap;margin-top:4px}.chip{background:#eef5f7;border-radius:999px;padding:6px 9px;font-size:12px;font-weight:800;color:#38515e}.card-actions{margin-top:auto;padding-top:10px}.card-actions a{display:inline-block;background:var(--ink);color:white;text-decoration:none;font-weight:900;padding:11px 14px;border-radius:10px}
.placeholder{border:2px dashed #c8d9df;background:transparent;box-shadow:none}.placeholder .cover-area{background:transparent;color:#77909b;text-align:center}.placeholder .plus{font-size:60px;line-height:1;color:#9bb0b9}.placeholder .book-body{justify-content:center}
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.feature{background:white;border:1px solid var(--line);border-radius:16px;padding:24px}.feature h3{margin:0 0 8px}.feature p{margin:0;color:var(--muted)}
.about{background:#071a2b;color:white}.about .lead{color:#c2d7df}.newsletter{background:linear-gradient(135deg,#eef8f8,#fff9e9)}.notice{background:white;border-left:4px solid var(--gold);border-radius:0 12px 12px 0;padding:16px 18px;color:#45606d}
footer{background:#061522;color:#aec7d1;padding:44px 0}.foot{display:flex;justify-content:space-between;gap:30px;align-items:flex-start}.foot strong{color:white}.foot a{color:#dff7f4;text-decoration:none}.small{font-size:13px;max-width:700px}
.product-hero{padding:72px 0;background:linear-gradient(135deg,#061522,#0b3b64);color:white}.product-grid{display:grid;grid-template-columns:.7fr 1.3fr;gap:50px;align-items:center}.product-cover{width:min(320px,80vw);margin:auto;display:block;border-radius:6px;box-shadow:0 30px 80px rgba(0,0,0,.38)}.product-grid p{color:#d6e8ed;font-size:17px}.facts{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin:22px 0}.fact{border:1px solid rgba(255,255,255,.15);background:rgba(255,255,255,.06);border-radius:12px;padding:13px}.fact b{display:block;color:#9bf6ed;font-size:11px;letter-spacing:.08em;text-transform:uppercase}.content-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.content-item{background:white;border:1px solid var(--line);border-radius:14px;padding:17px}
@media(max-width:850px){.navlinks{display:none}.hero-grid,.product-grid{grid-template-columns:1fr}.hero-art{max-width:520px}.catalog,.features{grid-template-columns:1fr}.content-grid{grid-template-columns:1fr}.foot{flex-direction:column}}
@media(max-width:520px){.wrap{width:min(100% - 24px,1120px)}.hero{padding:62px 0}h1{font-size:42px}.hero-art{grid-template-columns:1fr 1fr}.coming{min-height:160px;padding:16px}.facts{grid-template-columns:1fr}}

/* Order-enabled launch additions */
.price-line{display:flex;align-items:baseline;justify-content:space-between;gap:16px;border-top:1px solid var(--line);padding-top:14px;margin-top:4px}.price-line span{font-size:13px;font-weight:800;color:var(--muted)}.price-line strong{font-size:28px;line-height:1;color:var(--ink)}
.card-actions{display:flex;gap:9px;flex-wrap:wrap}.card-actions .order-link{background:var(--gold);color:var(--ink)}
.order-section{background:linear-gradient(135deg,#eef8f8,#fff9e9)}.order-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.order-step{background:white;border:1px solid var(--line);border-radius:16px;padding:22px}.order-step>b{display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--ink);color:white;margin-bottom:15px}.order-step h3{margin:0 0 7px}.order-step p{margin:0;color:var(--muted)}
.order-callout{margin-top:22px;background:var(--ink);color:white;border-radius:18px;padding:22px 24px;display:flex;align-items:center;justify-content:space-between;gap:24px}.order-callout h3{margin:4px 0}.order-callout p{margin:0;color:#c9dce4}.order-callout .tag{color:#8ff8ef}
.product-price{display:inline-flex;flex-direction:column;gap:2px;margin-top:2px;padding:14px 18px;border-radius:14px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.15)}.product-price>span{font-size:12px;font-weight:900;text-transform:uppercase;letter-spacing:.08em;color:#9bf6ed}.product-price strong{font-size:38px;line-height:1.05;color:var(--gold)}.product-price small{color:#d6e8ed}
.order-panel{display:grid;grid-template-columns:1.4fr .6fr;gap:22px;align-items:stretch}.order-panel>div{background:white;border:1px solid var(--line);border-radius:16px;padding:24px}.order-panel h3{margin-top:0}.order-panel ol{padding-left:20px;color:#38515e}.order-panel li{margin:8px 0}.security-note{background:#f5fafb;border-radius:10px;padding:12px 14px;color:#38515e}.order-box{display:flex;flex-direction:column;justify-content:center;gap:10px;text-align:center}.order-box .big-price{font-size:50px;line-height:1;color:var(--ink)}.order-box small{color:var(--muted)}
.legal-copy{max-width:850px}.legal-title{font-size:48px}.legal-copy h2{font-size:28px;margin-top:34px}.legal-copy p{color:#38515e}
@media(max-width:850px){.order-steps{grid-template-columns:repeat(2,1fr)}.order-panel{grid-template-columns:1fr}.order-callout{align-items:flex-start;flex-direction:column}}
@media(max-width:520px){.order-steps{grid-template-columns:1fr}.order-callout .btn{width:100%}.legal-title{font-size:40px}}