:root{--bg:#ffffff;--fg:#202622;--muted:#6b746d;--green:#0a5c33;--green-soft:#eef5f0;--gold:#b58a1c;--gold-soft:#fbf4e4;--line:#e7eae7;--card:#ffffff;--scale:15px;--maxw:720px;--font-bn:"Hind Siliguri","Noto Sans Bengali",system-ui,sans-serif;--font-en:"Inter",system-ui,sans-serif;color-scheme:light}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#0e1411;--fg:#e8ece9;--muted:#9aa49d;--green:#43b277;--green-soft:#15231b;--gold:#d9b24a;--gold-soft:#241f12;--line:#26302a;--card:#121a16;color-scheme:dark}}:root[data-theme=dark]{--bg:#0e1411;--fg:#e8ece9;--muted:#9aa49d;--green:#43b277;--green-soft:#15231b;--gold:#d9b24a;--gold-soft:#241f12;--line:#26302a;--card:#121a16;color-scheme:dark}*{box-sizing:border-box}body,html{margin:0;padding:0}img{max-width:100%}[hidden]{display:none!important}body{background:var(--bg);color:var(--fg);font-family:var(--font-bn);font-size:var(--scale);line-height:1.6;text-align:center;font-feature-settings:"tnum";-webkit-font-smoothing:antialiased}.wrap{width:100%;max-width:var(--maxw);margin-left:auto;margin-right:auto;padding-left:max(18px,env(safe-area-inset-left,0px));padding-right:max(18px,env(safe-area-inset-right,0px))}section{border-top:1px solid var(--line);padding-block:38px}section.first{border-top:0}h1,h2,h3{font-weight:700;line-height:1.3;text-wrap:balance;margin:0 auto}h1{font-size:1.72rem;max-width:16ch}h2{font-size:1.28rem;max-width:22ch}h3{font-size:1.02rem}p{margin:0 auto}.en,.num{font-family:var(--font-en)}.num{font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.muted{color:var(--muted)}.small{font-size:.86rem}.lead{max-width:40ch;margin:12px auto 0;color:var(--muted)}a{color:var(--green)}header{position:-webkit-sticky;position:sticky;top:0;z-index:10;background:var(--bg);border-bottom:1px solid var(--line)}.brand{display:block;padding-block:12px;font-family:var(--font-en);font-weight:700;font-size:1.18rem;letter-spacing:.2px;text-decoration:none}.brand b{color:var(--fg)}.brand span{color:var(--green)}.brand .bar{display:block;width:44px;height:3px;background:var(--green);border-radius:2px;margin:3px auto 0}.hero{padding-block:34px 30px}.tag{display:inline-block;font-size:.76rem;letter-spacing:.6px;text-transform:uppercase;color:var(--green);background:var(--green-soft);padding:5px 12px;border-radius:999px;margin-bottom:14px}.tool{border:1px solid var(--line);border-radius:14px;background:var(--card);padding:20px 16px;margin:0 auto;max-width:560px}.field{margin:0 auto 16px;max-width:360px}.label{display:block;font-size:.84rem;color:var(--muted);margin-bottom:7px}.amount{position:relative;max-width:260px;margin:0 auto}.amount .sign{position:absolute;left:16px;top:50%;transform:translateY(-50%);color:var(--muted);font-family:var(--font-en)}input[type=email],input[type=number]{width:100%;text-align:center;font-family:var(--font-en);font-size:1.3rem;font-weight:600;padding:13px 14px 13px 30px;border:1px solid var(--line);border-radius:10px;background:var(--bg);color:var(--fg)}input[type=email]{font-size:1rem;font-weight:500;padding:12px 14px}button:focus-visible,input:focus-visible,summary:focus-visible{outline:2px 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.pname{font-family:var(--font-en);font-weight:600;font-size:1.02rem;display:flex;align-items:center;gap:8px;justify-content:center;flex-wrap:wrap}.badge{font-family:var(--font-bn);font-size:.72rem;color:#fff;background:var(--gold);padding:2px 9px;border-radius:999px}.row .big{font-family:var(--font-en);font-feature-settings:"tnum";font-variant-numeric:tabular-nums;font-size:1.72rem;font-weight:700;color:var(--green);line-height:1.1}.row.best .big{font-size:2rem}.row .meta{font-size:.84rem;color:var(--muted)}.row .meta b{color:var(--fg);font-weight:600}.diff{font-size:.8rem;color:var(--muted)}.go{display:inline-block;margin-top:9px;font-family:var(--font-bn);font-size:.9rem;font-weight:600;color:#fff;background:var(--green);border:0;border-radius:9px;padding:9px 20px;cursor:pointer;text-decoration:none}.row.best .go{background:var(--gold)}.snapshot{margin:18px auto 0;max-width:460px;font-size:.82rem;color:var(--muted)}.steps{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:18px;gap:18px;max-width:620px;margin:22px auto 0}.step .n{font-family:var(--font-en);font-weight:700;color:var(--green);font-size:1.3rem}.step h3{margin-top:4px}.step p{font-size:.88rem;color:var(--muted);max-width:26ch}.alertbox{border:1px solid var(--line);border-radius:14px;background:var(--card);padding:22px 16px;max-width:460px;margin:20px auto 0}.alertbox input[type=email]{max-width:320px;margin:14px auto 10px}.msg{margin-top:12px;font-size:.9rem;color:var(--green);min-height:1.2em}.faq{max-width:620px;margin:16px auto 0;text-align:left}details{border-top:1px solid var(--line);padding:4px 0}summary{cursor:pointer;list-style:none;padding:12px 2px;font-weight:600;font-size:.98rem;display:flex;justify-content:space-between;gap:12px;align-items:center;text-align:left}summary::-webkit-details-marker{display:none}summary:after{content:"+";font-family:var(--font-en);color:var(--green);font-weight:700}details[open] summary:after{content:"\2013"}details p{margin:0 0 14px;font-size:.92rem;line-height:1.7;max-width:62ch}details p,footer{color:var(--muted)}footer{border-top:1px solid var(--line);padding-block:30px;font-size:.82rem}.legal{max-width:60ch;margin:10px auto 0;line-height:1.7}.nav{display:flex;flex-wrap:wrap;justify-content:center;gap:8px 18px;margin-bottom:10px}.nav a{color:var(--muted);text-decoration:none}@media (max-width:540px){.steps{grid-template-columns:1fr;gap:22px}h1{font-size:1.5rem}}