:root{--mint:#F2FBF8;--logo:#3E9E8C;--teal:#1F8A78;--teal-d:#176c5e;--dew:#7EDCC8;--ink:#0B2B33;--orange:#C2570C;--soft:#E3F4EF;--line:#CFE8E1;--mute:#4C6B70;--card:#fff;--bad:#B3361E;--bad-s:#FBE9E4;--good-s:#DDF5EC;--r:14px;--ease:cubic-bezier(.2,.8,.2,1);font-family:Hind Siliguri,Noto Sans Bengali,system-ui,-apple-system,Segoe UI,sans-serif;color:var(--ink);line-height:1.6;-webkit-text-size-adjust:100%}*{box-sizing:border-box}html,body{margin:0;background:var(--mint)}body{min-height:100dvh;font-size:16px}h1,h2,h3{line-height:1.25;margin:0 0 .4em;font-weight:700;letter-spacing:-.01em}h1{font-size:clamp(1.7rem,5vw,2.3rem)}h2{font-size:1.3rem}h3{font-size:1.06rem}p{margin:0 0 .8em}a{color:var(--teal)}:focus-visible{outline:3px solid var(--orange);outline-offset:2px;border-radius:6px}button,input,select,textarea{font:inherit;color:inherit}.wrap{max-width:1040px;margin:0 auto;padding:20px 16px 72px}.narrow{max-width:640px}.page{animation:rise .45s var(--ease) both}@keyframes 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var(--ease)}.top nav a{padding:12px}.burger{display:block}.me{display:none}.top nav{margin:0}}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:9px 20px;border-radius:999px;border:1.5px solid transparent;font-weight:600;cursor:pointer;text-decoration:none;transition:transform .15s var(--ease),background .2s,box-shadow .2s,border-color .2s}.btn:active{transform:scale(.97)}.btn:disabled{opacity:.55;cursor:not-allowed}.btn-primary{background:var(--teal);color:#fff}.btn-primary:hover:not(:disabled){background:var(--teal-d);box-shadow:0 6px 18px #1f8a7847}.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line)}.btn-ghost:hover:not(:disabled){border-color:var(--teal)}.btn-quiet{background:none;color:var(--teal-d);padding:6px 10px;min-height:38px}.btn-quiet:hover:not(:disabled){background:var(--soft)}.btn-danger{background:#fff;color:var(--bad);border-color:#ebc4ba}.btn-sm{min-height:36px;padding:4px 14px;font-size:.92rem}.btn-wide{width:100%}.spin{width:16px;height:16px;border-radius:50%;border:2.5px solid currentColor;border-right-color:transparent;animation:sp .7s linear infinite}@keyframes sp{to{transform:rotate(360deg)}}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:16px}.grid{display:grid;gap:14px}.g2{grid-template-columns:repeat(auto-fit,minmax(min(280px,100%),1fr))}.g3{grid-template-columns:repeat(auto-fit,minmax(min(200px,100%),1fr))}.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.between{justify-content:space-between}.mute{color:var(--mute)}.small{font-size:.9rem}.mt{margin-top:16px}.mb{margin-bottom:16px}.tag{display:inline-block;padding:1px 10px;border-radius:999px;background:var(--soft);color:var(--teal-d);font-size:.82rem;font-weight:600}.tag.warn{background:#fcebdd;color:#8c3f08}.tag.bad{background:var(--bad-s);color:var(--bad)}.link-card{display:block;color:inherit;text-decoration:none;transition:transform .2s 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i{display:block;height:64px;border-radius:12px;margin-bottom:10px;background:linear-gradient(90deg,#e4f3ef 25%,#f4fbf9,#e4f3ef 75%);background-size:300% 100%;animation:shim 1.4s linear infinite}@keyframes shim{to{background-position:-300% 0}}.errbox{background:var(--bad-s);border:1px solid #EBC4BA;color:#7c2412;border-radius:12px;padding:14px}.note{background:#fff6ec;border:1px solid #F3DDC3;border-radius:12px;padding:10px 14px;font-size:.93rem}.toast{position:fixed;left:50%;bottom:20px;transform:translate(-50%);z-index:70;background:var(--ink);color:#fff;padding:10px 18px;border-radius:12px;max-width:min(92vw,480px);animation:toast .35s var(--ease);box-shadow:0 10px 30px #00000040}.toast.bad{background:#7c2412}@keyframes toast{0%{opacity:0;transform:translate(-50%,14px)}}.scrim{position:fixed;inset:0;z-index:60;background:#0b2b3373;display:flex;align-items:flex-end;justify-content:center;animation:fade .2s}@keyframes fade{0%{opacity:0}}.sheet{background:#fff;border-radius:18px 18px 0 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13px;margin-bottom:8px;font-weight:600;font-size:.94rem;transition:background .45s,border-color .45s,transform .45s var(--ease)}.qopt.lit{background:#d5f2ea;border-color:var(--teal);transform:scale(1.015)}.shimmer{height:8px;border-radius:9px;background:var(--soft);overflow:hidden;margin-top:12px}.shimmer i{display:block;height:100%;width:65%;border-radius:9px;background:linear-gradient(90deg,var(--dew),var(--teal),var(--dew));background-size:200% 100%;animation:shim2 2.4s linear infinite}@keyframes shim2{to{background-position:-200% 0}}.drop{position:absolute;display:block;width:var(--s,26px);height:var(--s,26px);border-radius:50% 50% 50% 8%;background:linear-gradient(145deg,#a9e8da,#3e9e8c);transform:rotate(-45deg);animation:drift var(--d,7s) ease-in-out infinite;animation-delay:var(--dl,0s);opacity:.92}.drop-still{position:static;display:inline-block;animation:none;margin-bottom:8px}@keyframes drift{50%{translate:0 -16px}}@keyframes floaty{50%{transform:translateY(-10px)}}.jarbadge{position:absolute;right:0;bottom:12px;z-index:3;background:var(--ink);color:#fff;border-radius:999px;padding:6px 15px;font-size:.87rem;font-weight:600;display:flex;gap:8px;align-items:center}.jarbadge i{width:9px;height:9px;border-radius:50%;background:var(--dew);animation:pulse 1.8s infinite}@keyframes pulse{0%{box-shadow:0 0 #7edcc8b3}70%{box-shadow:0 0 0 9px #7edcc800}to{box-shadow:0 0 #7edcc800}}@media(max-width:760px){.hero{grid-template-columns:1fr;padding-top:24px}.hero-art{min-height:300px}}.band{background:#fff;border-block:1px solid var(--line)}.band .wrap{padding-block:38px}.ways{display:grid;gap:22px;grid-template-columns:repeat(auto-fit,minmax(min(240px,100%),1fr))}.ways h3{margin-bottom:3px}.foot{padding:24px 16px;text-align:center;color:var(--mute);font-size:.9rem}.price{font-size:1.9rem;font-weight:700}.tbl{width:100%;border-collapse:collapse;font-size:.94rem}.tbl th{text-align:left;font-weight:600;color:var(--mute);font-size:.87rem}.tbl td,.tbl th{padding:8px;border-bottom:1px solid var(--line);vertical-align:top}.scrollx{overflow-x:auto}.jar{width:84px;height:105px;flex:none}.jar-water{transition:transform 1.4s var(--ease)}.jar-wave{animation:wave 3.2s linear infinite}@keyframes wave{to{transform:translate(80px)}}.days{display:flex;gap:6px;margin-top:6px}.days i{width:15px;height:15px;border-radius:50% 50% 50% 12%;transform:rotate(-45deg);background:var(--soft);border:1px solid var(--line)}.days i.on{background:var(--logo);border-color:var(--logo);animation:pop .5s var(--ease) both}@keyframes pop{0%{scale:.2}60%{scale:1.2}}.stat b{display:block;font-size:1.65rem;line-height:1.2}.stat{font-size:.9rem;color:var(--mute)}.stat b{color:var(--ink)}.tree details{border-bottom:1px solid var(--line)}.tree summary{cursor:pointer;padding:10px 4px;font-weight:600;min-height:44px}.tree .topic{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:8px 4px 8px 16px;border-top:1px dashed var(--line)}.exam{min-height:100dvh;display:flex;flex-direction:column;background:var(--mint)}.ex-top{position:sticky;top:0;z-index:10;background:#fff;border-bottom:1px solid var(--line);padding:8px 14px;display:flex;align-items:center;gap:10px;justify-content:space-between}.timer{font-weight:700;font-variant-numeric:tabular-nums;font-size:1.2rem;padding:1px 12px;border-radius:9px;background:var(--soft)}.timer.low{background:var(--bad-s);color:var(--bad);animation:beat 1s infinite}@keyframes beat{50%{transform:scale(1.05)}}.saved{font-size:.8rem;color:var(--mute);display:flex;gap:5px;align-items:center}.saved i{width:7px;height:7px;border-radius:50%;background:var(--logo)}.saved.off i{background:var(--orange)}.progress{height:4px;background:var(--soft)}.progress i{display:block;height:100%;background:var(--teal);transition:width .4s var(--ease)}.ex-body{flex:1;width:100%;max-width:720px;margin:0 auto;padding:18px 14px 110px}.q-anim{animation:slideq .3s var(--ease)}.q-anim.back{animation-name:slideb}@keyframes slideq{0%{opacity:0;transform:translate(26px)}}@keyframes slideb{0%{opacity:0;transform:translate(-26px)}}.q-text{font-size:1.16rem;font-weight:600;line-height:1.7;margin-bottom:14px}.q-sec{color:var(--mute);font-size:1rem;font-weight:500;display:block;margin-top:3px}.opt{position:relative;display:flex;gap:12px;align-items:center;width:100%;text-align:left;min-height:56px;margin-bottom:10px;padding:10px 14px;border:1.5px solid var(--line);border-radius:13px;background:#fff;cursor:pointer;transition:border-color .2s,background .25s,transform .12s;overflow:hidden}.opt:active{transform:scale(.985)}.opt:hover{border-color:var(--logo)}.opt.sel{border-color:var(--teal);background:#e2f6f0}.opt .mark{flex:none;width:28px;height:28px;border-radius:50%;border:2px solid 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