@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+Bengali:wght@400;500;600;700;800&family=Manrope:wght@400;500;600;700;800&display=swap');
:root{--ink:#183b3a;--green:#164c43;--muted:#677c76;--paper:#f5f6f0;--line:#dfe5dc;--lime:#d5ec89}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px 'Noto Sans Bengali',sans-serif}a{color:inherit;text-decoration:none}button,input{font:inherit}button,a{ -webkit-tap-highlight-color:transparent}button{cursor:pointer}header{height:88px;display:flex;align-items:center;justify-content:space-between;max-width:1220px;margin:auto;padding:0 24px;border-bottom:1px solid var(--line)}.logo{display:flex;align-items:center;gap:12px}.mark{width:43px;height:43px;background:var(--green);color:var(--lime);border-radius:13px;display:grid;place-items:center;font-size:26px}.logo strong{font-size:24px}.logo small{display:block;font:10px Manrope,sans-serif;letter-spacing:3px;margin-top:2px}.nav{display:flex;gap:30px;font-size:14px}.nav a:hover{color:#6c8933}.pill{font-size:12px;background:#e6edde;padding:10px 16px;border-radius:24px}.wrap{max-width:1220px;margin:auto;padding:0 24px}.hero{display:grid;grid-template-columns:1.08fr .92fr;gap:56px;align-items:center;padding:66px 0 55px}.eyebrow{display:inline-flex;gap:8px;font-size:12px;font-weight:600;letter-spacing:1px;color:#50755b}.dot{color:#8fae44}h1{font-size:clamp(36px,4.2vw,57px);line-height:1.36;letter-spacing:-1.5px;font-weight:700;margin:19px 0}h1 .accent{color:#66813b}.lead{font-size:16px;line-height:1.9;color:var(--muted);max-width:540px}.actions{display:flex;gap:12px;flex-wrap:wrap;margin:26px 0}.btn{display:inline-flex;align-items:center;justify-content:center;gap:18px;padding:14px 22px;background:var(--green);border:1px solid var(--green);border-radius:10px;color:#fff;font-weight:600;font-size:14px}.btn.light{background:transparent;color:var(--ink);border-color:#cdd6c9}.tiny{font-size:12px;color:var(--muted)}.hero-art{position:relative;background:#dce4d0;border-radius:26px;padding:26px;min-height:366px;overflow:hidden}.hero-art:before{content:'';position:absolute;width:330px;height:330px;border:1px solid #bccaae;border-radius:50%;right:-70px;top:-90px}.paper{position:relative;background:#fffef9;transform:rotate(-3deg);border-radius:14px;box-shadow:0 16px 36px #36503d16;padding:29px;min-height:262px;max-width:348px;margin:12px auto}.paper .kicker{font:11px Manrope,sans-serif;letter-spacing:2px;color:#7c8a70}.paper h3{font-size:23px;margin:15px 0}.paper .line{height:6px;background:#e9ece2;border-radius:6px;margin:10px 0}.paper .line.short{width:64%}.math{font:28px Manrope,sans-serif;margin:22px 0;color:#396146}.answer-chip{font-size:12px;background:#edf3dd;border-radius:8px;padding:9px;display:inline-block}.floating{position:absolute;right:18px;bottom:18px;transform:rotate(3deg);background:var(--green);color:#fff;border-radius:13px;padding:16px 20px;box-shadow:0 10px 25px #254d3930}.floating small{color:#d7e6ba;font-size:11px}.floating b{display:block;font-size:17px;margin-top:6px}.strip{display:flex;justify-content:space-between;gap:18px;padding:22px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);font-size:13px;color:#66776a}.strip span:first-child{color:var(--ink);font-weight:600}.section{padding:44px 0}.section-title{display:flex;align-items:end;justify-content:space-between;margin-bottom:22px;gap:20px}.section-title h2{font-size:27px;margin:5px 0}.section-title p{font-size:14px;color:var(--muted);margin:0}.grid2{display:grid;grid-template-columns:1fr 1fr;gap:18px}.path{padding:26px;border:1px solid var(--line);border-radius:17px;background:#fffef9;display:flex;gap:22px;align-items:center;transition:.2s}.path:hover{transform:translateY(-3px);box-shadow:0 10px 22px #1c463512}.path .icon{font:30px Manrope,sans-serif;background:#edf1dc;color:#647d38;border-radius:15px;padding:16px}.path h3{font-size:23px;margin:3px 0 5px}.path p{font-size:13px;color:var(--muted);margin:0}.arrow{margin-left:auto;font-size:26px}.tag{font:10px Manrope,sans-serif;letter-spacing:1.5px;color:#7b8e6c}.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card{background:#fffef9;border:1px solid var(--line);padding:25px;border-radius:16px}.card h3{font-size:19px;margin:14px 0 8px}.card p{font-size:14px;line-height:1.8;color:var(--muted)}.card .symbol{background:#edf1e5;width:40px;height:40px;border-radius:11px;display:grid;place-items:center;font-size:20px}.card a{font-size:13px;font-weight:600;color:#456d45;display:inline-block;margin-top:10px}.banner{display:flex;align-items:center;justify-content:space-between;gap:28px;padding:32px;background:var(--green);color:white;border-radius:18px}.banner h2{font-size:25px;margin:0 0 8px}.banner p{font-size:14px;color:#cfdecf;margin:0;line-height:1.8}.banner .btn{background:var(--lime);color:var(--ink);white-space:nowrap}footer{border-top:1px solid var(--line);padding:32px 0;margin-top:42px;font-size:12px;color:var(--muted)}.foot{display:flex;justify-content:space-between;gap:24px}.foot p{line-height:1.9;max-width:530px}.breadcrumb{font-size:12px;color:var(--muted);padding-top:28px}.page-head{padding:30px 0}.page-head h1{font-size:38px}.notice{background:#ebefdf;border:1px solid #d9e2c6;padding:16px 20px;border-radius:12px;font-size:13px;line-height:1.9;margin:20px 0}.subjects{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.subject{background:#fffef9;border:1px solid var(--line);border-radius:13px;padding:21px}.subject h3{font-size:17px;margin:4px 0 10px}.status{font-size:11px;color:var(--muted)}.study{max-width:850px}.study h2{margin-top:30px}.study p,.study li{line-height:2}.formula{background:#edf2df;padding:20px;border-radius:12px;font-family:Manrope,sans-serif;font-size:20px}details{border:1px solid var(--line);padding:18px;border-radius:12px;margin:14px 0;background:#fffef9}summary{cursor:pointer;font-weight:600}.source{font:12px Manrope,sans-serif;text-decoration:underline;overflow-wrap:anywhere}.question{padding:24px;border:1px solid var(--line);border-radius:15px;margin:18px 0;background:#fffef9}.opts{display:grid;grid-template-columns:1fr 1fr;gap:10px}.opt{background:transparent;border:1px solid #dce2d5;padding:13px;border-radius:9px;text-align:left;color:var(--ink)}.opt.selected{background:#e1edbd;border-color:#739947}.result{padding:20px;background:#e5efd2;border-radius:13px;margin:16px 0}.search{width:100%;padding:14px;border:1px solid var(--line);border-radius:10px;background:#fffef9;margin-bottom:22px}.chips{display:flex;gap:10px;flex-wrap:wrap;margin:18px 0}.chips a{padding:9px 18px;background:#e9eddf;border-radius:22px;font-size:13px}.progress{display:flex;align-items:center;gap:15px;color:#597459;font-size:13px;margin-bottom:16px}a:focus-visible,button:focus-visible{outline:3px solid #b0cf58;outline-offset:4px}.empty{padding:24px;border:1px dashed #c4d0b4;border-radius:15px;line-height:1.9;color:var(--muted)}@media(max-width:800px){header{height:76px}.nav{gap:16px;font-size:12px}.pill{display:none}.hero{grid-template-columns:1fr;gap:25px;padding:38px 0}.hero-art{min-height:330px}.strip{flex-wrap:wrap;justify-content:flex-start;gap:12px 24px}.grid3{grid-template-columns:1fr}.subjects{grid-template-columns:repeat(2,1fr)}.section{padding:30px 0}.banner{align-items:start;flex-direction:column}.grid2{grid-template-columns:1fr}.section-title{align-items:start;flex-direction:column;gap:4px}.foot{flex-direction:column;gap:0}}@media(max-width:440px){.wrap,header{padding-left:18px;padding-right:18px}.logo strong{font-size:21px}.nav a:nth-child(2){display:none}.nav{gap:12px}.mark{width:36px;height:36px}.opts{grid-template-columns:1fr}.path{padding:21px;gap:15px}h1{font-size:38px}.lead{font-size:14px}.hero-art{padding:16px}.paper{padding:25px}.floating{right:12px}.subjects{gap:10px}.subject{padding:16px}.page-head h1{font-size:31px}}