*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,Segoe UI,Noto Sans Bengali,Noto Sans,Arial,sans-serif;color:#20252b;background:#fff;line-height:1.65}.container{width:min(1120px,92%);margin:auto}.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-bottom:1px solid #e7e9ec}.nav{height:74px;display:flex;align-items:center;gap:28px}.brand{display:flex;align-items:center;gap:10px;color:#1e242a;text-decoration:none;margin-right:auto}.brand-mark{width:42px;height:42px;display:grid;place-items:center;border-radius:11px;background:#18212a;color:#fff;font-size:23px;font-weight:800}.brand strong{display:block;font-size:18px;letter-spacing:.2px}.brand small{display:block;color:#77808a;font-size:11px;margin-top:-4px}.nav nav{display:flex;gap:22px}.nav nav a{color:#525a63;text-decoration:none;font-size:14px}.nav nav a:hover{color:#111}.nav-btn{background:#1e2933;color:#fff;padding:9px 17px;border-radius:7px;text-decoration:none;font-size:13px;font-weight:700}.hero{background:linear-gradient(135deg,#eef5ff 0%,#fff 58%,#f5f8fa 100%);padding:92px 0 84px;border-bottom:1px solid #e7ebef}.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:70px;align-items:center}.eyebrow,.section-kicker{font-size:11px;letter-spacing:2px;font-weight:800;color:#4d78a8}.hero h1{font-size:64px;line-height:1.06;margin:13px 0 20px;letter-spacing:-2px}.hero h1 span{color:#2b70b8}.lead{font-size:18px;color:#59636d;max-width:650px}.hero-actions{display:flex;gap:12px;margin:30px 0 12px;flex-wrap:wrap}.btn{display:inline-flex;padding:13px 19px;border-radius:8px;text-decoration:none;font-weight:750}.btn.primary{background:#1d6fb7;color:#fff;box-shadow:0 8px 22px rgba(29,111,183,.18)}.btn.secondary{background:#fff;color:#26313b;border:1px solid #d6dce2}.tiny{font-size:12px;color:#7c858e}.hero-card{background:#fff;border:1px solid #dce2e7;border-radius:14px;overflow:hidden;box-shadow:0 24px 55px rgba(30,50,70,.14);transform:rotate(1deg)}.window-bar{height:46px;background:#1e2933;color:#fff;display:flex;align-items:center;gap:7px;padding:0 15px;font-size:13px}.window-bar span{width:9px;height:9px;border-radius:50%;background:#8c969f}.window-bar b{margin-left:auto;margin-right:auto}.typing-demo{padding:34px 32px 30px}.demo-label{font-size:12px;color:#7c8791;margin-bottom:7px}.typed,.bangla{border:1px solid #e1e6ea;border-radius:8px;padding:14px 15px;font-size:18px;background:#fafbfc}.typed{font-family:Consolas,monospace;color:#4f5b65}.arrow{text-align:center;color:#4d78a8;font-size:23px;margin:7px}.bangla{font-size:25px;background:#f4f9ff;color:#1d5487}.status-row{margin-top:20px;display:flex;align-items:center;gap:8px;color:#66717b;font-size:12px}.status-dot{width:8px;height:8px;border-radius:50%;background:#42a66c}.status-row kbd{border:1px solid #d8dde2;border-bottom-width:2px;border-radius:5px;background:#fff;padding:2px 6px;margin-left:2px;font-family:inherit}.download-strip{background:#202a33;color:#fff;padding:40px 0}.download-inner{display:flex;align-items:center;justify-content:space-between;gap:30px}.download-strip .section-kicker{color:#91bde2}.download-strip h2{margin:3px 0 5px;font-size:30px}.download-strip p{margin:0;color:#b8c1c9;max-width:680px}.download-btn{display:flex;align-items:center;gap:12px;background:#e7b94f;color:#151a1f;padding:13px 18px;border-radius:8px;text-decoration:none;min-width:205px;justify-content:center}.download-btn span:first-child{font-size:22px}.download-btn strong{display:block;font-size:14px}.download-btn small{display:block;font-size:11px;opacity:.7}.section{padding:86px 0}.alt{background:#f5f7f9}.section-head{display:flex;justify-content:space-between;gap:40px;align-items:end;margin-bottom:34px}.section h2{font-size:38px;line-height:1.2;margin:5px 0 0;letter-spacing:-.7px}.section-head>p{max-width:490px;color:#68727c;margin:0}.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}.feature{border:1px solid #e0e5e9;border-radius:12px;padding:27px;background:#fff}.feature .icon{width:42px;height:42px;display:grid;place-items:center;background:#edf5fc;color:#246ba3;border-radius:10px;font-weight:800;font-size:18px}.feature h3{margin:16px 0 7px;font-size:18px}.feature p{color:#69737d;font-size:14px;margin:0 0 15px}.feature code{display:inline-block;background:#f4f6f8;padding:6px 9px;border-radius:6px;color:#58646f;font-size:12px}.guide-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:70px;align-items:start}.steps{margin-top:30px}.step{display:grid;grid-template-columns:52px 1fr;gap:15px;padding:18px 0;border-bottom:1px solid #dfe4e8}.step b{font-size:13px;color:#3778ae}.step h3{margin:0 0 4px}.step p{margin:0;color:#68727c;font-size:14px}.callout{background:#1e2933;color:#fff;border-radius:14px;padding:35px;box-shadow:0 20px 45px rgba(30,41,51,.14)}.callout-icon{width:50px;height:50px;display:grid;place-items:center;border-radius:12px;background:#fff;color:#1e2933;font-size:25px;font-weight:800}.callout h3{font-size:23px;margin:18px 0 8px}.callout p{color:#c3cbd1}.file-path{margin-top:22px;padding:11px 12px;border:1px solid #45515b;border-radius:7px;background:#172029;color:#a8cbe7;font-family:Consolas,monospace;font-size:11px;overflow:auto}.narrow{max-width:850px}.narrow>h2{margin-bottom:28px}details{border-top:1px solid #dfe4e8;padding:18px 0}details:last-child{border-bottom:1px solid #dfe4e8}summary{cursor:pointer;font-weight:750}details p{color:#66717b;margin:9px 0 0}footer{background:#151c22;color:#aeb7bf;padding:28px 0;font-size:12px}.footer-inner{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}.footer-inner strong{color:#fff}.footer-links{display:flex;gap:18px}.footer-links a{color:#aeb7bf;text-decoration:none}.footer-links a:hover{color:#fff}@media(max-width:850px){.nav nav{display:none}.hero-grid,.guide-grid{grid-template-columns:1fr;gap:40px}.hero{padding:65px 0}.hero h1{font-size:49px}.feature-grid{grid-template-columns:1fr 1fr}.section-head{display:block}.section-head>p{margin-top:15px}.download-inner{display:block}.download-btn{margin-top:22px;width:max-content}.hero-card{transform:none}}@media(max-width:560px){.nav{height:65px}.nav-btn{display:none}.brand-mark{width:36px;height:36px}.hero h1{font-size:42px}.lead{font-size:16px}.feature-grid{grid-template-columns:1fr}.section{padding:65px 0}.section h2{font-size:31px}.download-strip h2{font-size:25px}.footer-inner{display:block}.footer-inner div+div{margin-top:7px}.typing-demo{padding:25px 18px}.bangla{font-size:21px}}

/* ===== v20261017: accessibility, mobile menu, shared pages ===== */
section[id]{scroll-margin-top:84px}
.skip-link{position:absolute;left:12px;top:-64px;z-index:100;background:#18212a;color:#fff;padding:10px 16px;border-radius:8px;text-decoration:none;font-weight:700}
.skip-link:focus{top:10px}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #1d6fb7;outline-offset:3px;border-radius:6px}
.tiny,.demo-label{color:#626d77}
.brand small{color:#5f6a74}
.nav nav a[aria-current="page"]{color:#111;font-weight:700}
.nav nav a{white-space:nowrap}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid #d6dce2;border-radius:10px;background:#fff;cursor:pointer;padding:0;flex-direction:column;align-items:center;justify-content:center;gap:5px}
.nav-toggle span{display:block;width:20px;height:2px;background:#26313b;border-radius:2px;transition:transform .2s,opacity .2s}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.footer-links{flex-wrap:wrap}
.footer-links a{padding:2px 0}
.btn.primary:hover{background:#185f9d}
.btn.secondary:hover{border-color:#a9b4be}
.download-btn:hover{background:#efc666}
@media(max-width:850px){
  .nav{gap:12px}
  .nav-toggle{display:flex}
  .nav-btn{margin-left:auto}
  .brand{margin-right:0}
  .nav nav{display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;gap:0;background:#fff;border-bottom:1px solid #e7e9ec;box-shadow:0 18px 30px rgba(30,50,70,.10);padding:6px 4% 12px}
  .nav nav.open{display:flex}
  .nav nav a{padding:14px 4px;font-size:16px;border-bottom:1px solid #f0f2f4}
  .nav nav a:last-child{border-bottom:0}
}
@media(max-width:560px){
  .nav-btn{display:none}
  .brand{margin-right:auto}
}

/* Breadcrumb */
.breadcrumb{display:flex;align-items:center;gap:8px;padding:22px 0 0;font-size:13px;color:#5f6a74;flex-wrap:wrap}
.breadcrumb a{color:#1d6fb7;text-decoration:none}
.breadcrumb a:hover{text-decoration:underline}

/* Developer page */
.dev-hero{padding:34px 0 64px;background:linear-gradient(135deg,#eef5ff 0%,#fff 60%,#f5f8fa 100%);border-bottom:1px solid #e7ebef}
.dev-hero-grid{display:grid;grid-template-columns:minmax(240px,350px) 1fr;gap:56px;align-items:center}
.dev-photo{margin:0;border-radius:18px;overflow:hidden;background:#dfe6ec;box-shadow:0 24px 55px rgba(30,50,70,.16);aspect-ratio:4/5}
.dev-photo img{display:block;width:100%;height:100%;object-fit:cover;object-position:center 24%}
.dev-role{margin:0 0 6px;color:#2b70b8;font-weight:700;font-size:15px}
.dev-intro h1{font-size:clamp(36px,5.2vw,58px);line-height:1.12;margin:0 0 18px;letter-spacing:-1px}
.dev-lead{font-size:18px;color:#4f5a64;max-width:62ch;margin:0 0 22px}
.profile-tags{display:flex;flex-wrap:wrap;gap:9px;list-style:none;margin:0 0 28px;padding:0}
.profile-tags li{border:1px solid #d6dce2;background:#fff;border-radius:999px;padding:6px 14px;font-size:14px;color:#33404b}
.dev-actions{display:flex;flex-wrap:wrap;gap:12px}
.dev-body{padding:70px 0 90px}
.dev-grid{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(260px,.8fr);gap:56px;align-items:start}
.profile-block{padding:0 0 34px;margin:0 0 34px;border-bottom:1px solid #e3e7eb}
.profile-block:last-child{border-bottom:0;margin-bottom:0;padding-bottom:0}
.profile-block h2{font-size:28px;line-height:1.25;margin:0 0 14px;letter-spacing:-.4px}
.profile-block p{color:#46515b;font-size:16.5px;line-height:1.9;margin:0 0 12px;max-width:68ch}
.profile-block a,.legal a{color:#1d6fb7}
.dev-facts{background:#f5f7f9;border:1px solid #e0e5e9;border-radius:14px;padding:26px;position:sticky;top:96px}
.dev-facts h2{font-size:20px;margin:0 0 14px}
.dev-facts h3{font-size:16px;margin:24px 0 10px}
.dev-facts dl{margin:0}
.dev-facts dl>div{padding:11px 0;border-bottom:1px solid #e1e6ea}
.dev-facts dl>div:last-child{border-bottom:0}
.dev-facts dt{font-size:12.5px;color:#5f6a74;margin-bottom:2px}
.dev-facts dd{margin:0;font-weight:650;font-size:15px;color:#20252b}
.contact-links{display:flex;flex-direction:column;gap:9px}
.contact-links a{display:block;padding:10px 14px;border:1px solid #d6dce2;border-radius:9px;background:#fff;color:#1d5f9c;text-decoration:none;font-size:14px;overflow-wrap:anywhere}
.contact-links a:hover{border-color:#1d6fb7}
@media(max-width:850px){
  .dev-hero-grid{grid-template-columns:1fr;gap:30px}
  .dev-photo{max-width:330px}
  .dev-grid{grid-template-columns:1fr;gap:36px}
  .dev-facts{position:static}
}

/* Legal pages */
.legal{padding:70px 0 90px}
.legal .container{max-width:820px}
.legal h1{font-size:36px;margin:0 0 6px}
.legal .updated{color:#5f6a74;font-size:13px;margin-bottom:34px}
.legal h2{font-size:21px;margin:34px 0 10px}
.legal p,.legal li{color:#454e57;font-size:15px;line-height:1.75}
.legal ul{padding-right:0;padding-left:20px}

/* 404 */
.error-page{min-height:70vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:60px 20px}
.error-page .code{font-size:96px;font-weight:800;color:#dce2e7;line-height:1}
.error-page h1{font-size:28px;margin:10px 0 12px}
.error-page p{color:#59636d;max-width:420px;margin:0 auto 26px}

@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{transition:none!important}
}

.profile-block h3{font-size:19px;line-height:1.35;margin:24px 0 10px}
.profile-block ul{margin:0 0 12px;padding-left:22px;max-width:68ch}
.profile-block li{color:#46515b;font-size:16.5px;line-height:1.85;margin-bottom:8px}

/* ===== v20261018b: redesign (typography, hero, download, layouts) ===== */
body{font-family:"Hind Siliguri","Noto Sans Bengali","Segoe UI",Inter,Arial,sans-serif;font-size:17px;line-height:1.75}
h1,h2{font-family:"Noto Serif Bengali","Hind Siliguri","Noto Sans Bengali",serif;font-weight:700}
.section h2,.final-cta h2,.download-strip h2{letter-spacing:0;line-height:1.35}
.nav-btn{background:#e7b94f;color:#151a1f}
.nav-btn:hover{background:#efc666}

/* Hero */
.hero{background:radial-gradient(900px 420px at 85% 10%,rgba(43,112,184,.35),transparent 60%),#0f1b26;color:#fff;padding:96px 0 90px;border-bottom:0}
.hero h1{font-size:clamp(40px,6vw,66px);line-height:1.2;letter-spacing:0;margin:0 0 22px;color:#fff}
.hero h1 .h1-sub{display:block;font-family:"Hind Siliguri","Noto Sans Bengali",sans-serif;font-size:clamp(20px,2.6vw,28px);font-weight:500;line-height:1.5;color:#e7b94f;margin-top:12px}
.hero .lead{color:#c5d0da;font-size:18px;max-width:34em}
.hero-actions{margin:32px 0 14px}
.btn.gold{background:#e7b94f;color:#151a1f;box-shadow:0 10px 26px rgba(231,185,79,.22)}
.btn.gold:hover{background:#efc666}
.btn.ghost{color:#fff;border:1px solid rgba(255,255,255,.28)}
.btn.ghost:hover{border-color:rgba(255,255,255,.6)}
.btn{font-size:16px;padding:14px 22px}
.hero-meta{margin:0;font-size:14px;color:#9fb0bf}
.hero-meta a{color:#cfe3f5}
.hero-card{transform:none;border:1px solid rgba(255,255,255,.12);box-shadow:0 30px 70px rgba(0,0,0,.45)}
.typed{min-height:56px;display:flex;align-items:center}
.caret{display:inline-block;width:2px;height:1.1em;background:#2b70b8;margin-left:2px;animation:blink 1s steps(1) infinite}
.bangla{min-height:64px;display:flex;align-items:center;transition:opacity .25s}
.bangla.dim{opacity:.25}
@keyframes blink{50%{opacity:0}}

/* Download */
.download-strip{background:#17232f;padding:56px 0}
.download-inner{align-items:flex-start;gap:48px}
.dl-text{flex:1 1 52%}
.download-strip h2{font-size:clamp(26px,3.4vw,34px);margin:0 0 10px}
.download-strip p{color:#b8c6d2}
.file-facts{display:grid;grid-template-columns:repeat(4,auto);gap:10px 28px;margin:24px 0 0;justify-content:start}
.file-facts dt{font-size:13px;color:#8ea0b0}
.file-facts dd{margin:0;font-weight:600;color:#fff;font-size:15px}
.dl-action{flex:1 1 40%;max-width:440px}
.download-btn{width:100%;padding:16px 20px;font-size:16px}
.download-btn small{font-size:12px;opacity:.75}
.dl-note{font-size:13.5px;margin-top:12px!important;color:#9fb0bf!important}
.checksum{margin-top:14px;border:1px solid #2c3b49;border-radius:10px;padding:12px 14px;background:#111c26}
.checksum:last-child{border-bottom:1px solid #2c3b49}
.checksum summary{font-size:14px;font-weight:600;color:#cfe3f5}
.checksum code{display:block;margin-top:10px;font-family:Consolas,monospace;font-size:12px;color:#a8cbe7;word-break:break-all;line-height:1.6}

/* Features, layouts */
.section{padding:90px 0}
.section-head{margin-bottom:40px}
.section-head>p{font-size:17px;max-width:30em}
.feature{padding:28px;border-radius:14px}
.feature h3{font-size:19px;line-height:1.4}
.feature p{font-size:15.5px;line-height:1.7}
.feature code{font-family:"Hind Siliguri",Consolas,monospace;font-size:13px}
.layout-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.layout-card{background:#fff;border:1px solid #e0e5e9;border-radius:14px;padding:30px}
.layout-card h3{font-size:22px;margin:0 0 10px}
.layout-card p{color:#59636d;margin:0 0 20px}
.layout-card .example{display:flex;flex-direction:column;gap:6px;background:#f4f9ff;border:1px solid #dbe8f5;border-radius:10px;padding:14px 16px}
.layout-card .example span{font-family:Consolas,"Hind Siliguri",monospace;font-size:14px;color:#4f5b65}
.layout-card .example b{font-size:21px;color:#1d5487;font-weight:600}

/* Steps, FAQ, final CTA */
.steps{list-style:none;margin:28px 0 0;padding:0}
.step{grid-template-columns:48px 1fr}
.step>b{width:36px;height:36px;display:grid;place-items:center;border-radius:50%;background:#1d6fb7;color:#fff;font-size:16px}
.step h3{font-size:19px}
.step p{font-size:16px}
.narrow>h2{margin-bottom:26px}
summary{font-size:18px;line-height:1.5}
details p{font-size:16.5px;line-height:1.8;max-width:62ch}
.final-cta{background:#0f1b26;color:#fff;text-align:center;padding:84px 0}
.final-cta h2{font-size:clamp(28px,4vw,40px);margin:0 0 10px}
.final-cta p{color:#c5d0da;margin:0 0 26px}
.final-cta .hero-meta{margin-top:20px}

@media(max-width:850px){
  .hero{padding:64px 0}
  .download-inner{display:flex;flex-direction:column;gap:30px}
  .dl-action{max-width:none;width:100%}
  .file-facts{grid-template-columns:repeat(2,auto)}
  .layout-grid{grid-template-columns:1fr}
}
@media(max-width:560px){
  body{font-size:16.5px}
  .section{padding:64px 0}
  .btn{width:100%;justify-content:center}
  .hero-actions{flex-direction:column}
}
@media(prefers-reduced-motion:reduce){.caret{animation:none}}