:root{--green:#006a4e;--green-dark:#004d38;--red:#f42a41;--ink:#0f172a;--muted:#64748b;--bg:#f6f8fb;--card:#fff;--radius:16px;--shadow:0 10px 30px rgba(15,23,42,.08)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:"Noto Sans Bengali","Hind Siliguri",system-ui,Arial,sans-serif;background:var(--bg);color:var(--ink)}
a{color:inherit}.container{max-width:1180px;margin:auto;padding:0 20px}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.85);backdrop-filter:blur(14px);border-bottom:1px solid #e5eaf1}
.nav-wrap{max-width:1180px;margin:auto;padding:14px 20px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{font-weight:800;font-size:22px;text-decoration:none;color:var(--green);display:flex;align-items:center;gap:10px}
.logo{background:linear-gradient(135deg,var(--green),#0ea5e9);color:#fff;border-radius:10px;padding:6px 10px;font-size:15px}
.main-nav{display:flex;gap:8px}.main-nav a{text-decoration:none;padding:9px 15px;border-radius:999px;font-weight:600;color:#334155}
.main-nav a:hover{background:#eef6f3;color:var(--green)}
.main-nav a.active{background:var(--green);color:#fff}
.menu-btn{display:none;background:none;border:0;font-size:26px;color:var(--green)}
.hero{background:radial-gradient(1000px 500px at 80% -10%,rgba(14,165,233,.18),transparent),linear-gradient(135deg,#00382a,#006a4e 55%,#0b7285);color:#fff;padding:90px 0 100px;text-align:center}
.hero h1{font-size:clamp(34px,6vw,62px);line-height:1.1;margin:0 0 18px}
.hero p{max-width:720px;margin:0 auto 30px;color:#d9f2ea;font-size:18px}
.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 26px;border-radius:999px;font-weight:700;text-decoration:none;border:0;cursor:pointer}
.btn-primary{background:var(--red);color:#fff;box-shadow:0 10px 24px rgba(244,42,65,.28)}
.btn-light{background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.35)}
.btn-primary:hover{transform:translateY(-2px)}
.section{padding:70px 0}.section-title{text-align:center;font-size:clamp(26px,4vw,38px);margin:0 0 10px}
.section-sub{text-align:center;color:var(--muted);margin:0 auto 40px;max-width:680px}
.subject-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px}
.subject-card{background:var(--card);border-radius:var(--radius);padding:26px;text-decoration:none;box-shadow:var(--shadow);border:1px solid #edf1f6;transition:.2s}
.subject-card:hover{transform:translateY(-5px);border-color:#bfe3d7}
.subject-card h3{margin:0 0 8px;color:var(--green)}
.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}
.feature{background:var(--card);padding:26px;border-radius:var(--radius);box-shadow:var(--shadow)}
.feature h3{margin:0 0 8px}.feature p{color:var(--muted);margin:0}
.question-card,.form-card,.result-summary{background:var(--card);padding:22px;border-radius:var(--radius);margin-bottom:18px;box-shadow:var(--shadow)}
.qmeta{display:flex;justify-content:space-between;font-size:13px;color:var(--muted);margin-bottom:10px}
.qmeta span{background:#eef6f3;color:var(--green);padding:4px 10px;border-radius:999px;font-weight:700}
.qtext{font-size:17px}.stem{background:#f8fafc;border-left:4px solid var(--green);padding:12px;border-radius:8px;margin:10px 0}
.option{display:flex;gap:10px;align-items:flex-start;padding:10px;border:1px solid #e5eaf1;border-radius:10px;margin:8px 0}
.option:hover{border-color:var(--green)}
.form-card label{display:block;margin-bottom:14px;font-weight:600}
input,select,textarea{width:100%;padding:12px;margin-top:6px;border:1px solid #cbd5e1;border-radius:10px;font-size:15px;font-family:inherit}
.filter-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:14px}
.btn-primary{display:inline-block;background:var(--green);color:#fff;border:none;padding:13px 24px;border-radius:999px;font-size:16px;font-weight:700;cursor:pointer;text-decoration:none}
.btn-primary:hover{background:var(--green-dark)}
.success{color:#166534}.error{color:#b91c1c}.badge{background:#e0f2fe;color:#075985;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:700}
table{width:100%;border-collapse:collapse;background:var(--card);border-radius:12px;overflow:hidden;box-shadow:var(--shadow)}
th,td{padding:14px;border-bottom:1px solid #edf1f6;text-align:left}
th{background:#f1f5f9}.danger{color:#dc2626}
#timer{font-size:28px;font-weight:800;color:var(--red)}
.site-footer{margin-top:70px;background:#0b1220;color:#cbd5e1;padding:60px 0 0}
.footer-grid{max-width:1180px;margin:auto;padding:0 20px;display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:34px}
.site-footer h3,.site-footer h4{color:#fff;margin:0 0 12px}
.site-footer a{color:#93c5fd;text-decoration:none}
.footer-bottom{border-top:1px solid #1e293b;margin-top:40px;padding:18px;text-align:center;color:#94a3b8}
.paper{position:relative;background:#fff}.watermark{position:fixed;top:40%;left:20%;font-size:70px;color:rgba(0,0,0,.07);transform:rotate(-25deg);z-index:-1}
.paper-header,.paper-footer{text-align:center;margin:10px 0}
@media(max-width:820px){.main-nav{position:absolute;top:70px;right:16px;left:16px;background:#fff;flex-direction:column;padding:12px;border-radius:14px;box-shadow:var(--shadow);display:none}.main-nav.open{display:flex}.menu-btn{display:block}.hero{padding:70px 0}}
@media print{.site-header,.site-footer,.no-print,#timer{display:none}body{background:#fff}}