:root{--bg:#f6f8fc;--card:#fff;--text:#0f172a;--muted:#64748b;--line:#e2e8f0;--blue:#2563eb}*{box-sizing:border-box}body{margin:0;background:var(--bg);font-family:Segoe UI,Noto Sans Bengali,Arial,sans-serif;color:var(--text)}a{text-decoration:none;color:inherit}.wrap{width:min(1160px,92%);margin:auto}header{position:sticky;top:0;z-index:5;background:#fff;border-bottom:1px solid var(--line)}.nav{height:76px;display:flex;justify-content:space-between;align-items:center}.brand{display:flex;gap:10px;align-items:center;font-size:24px;font-weight:900}.brand span{width:40px;height:40px;display:grid;place-items:center;border-radius:14px;color:white;background:linear-gradient(135deg,#2563eb,#06b6d4)}nav{display:flex;gap:24px;color:var(--muted);font-weight:800}.btn{display:inline-flex;border-radius:14px;padding:13px 18px;background:#e2e8f0;font-weight:900}.btn.primary{background:var(--blue);color:white}.hero{padding:84px 0;background:radial-gradient(circle at top left,#dbeafe,transparent 35%),radial-gradient(circle at top right,#cffafe,transparent 30%)}.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:44px;align-items:center}.tag{color:var(--blue);font-weight:900;text-transform:uppercase;letter-spacing:.08em;font-size:13px}h1{font-size:56px;line-height:1.05;margin:12px 0 20px}h2{font-size:38px;margin:8px 0 22px}p{color:var(--muted);line-height:1.75}.hero-card{background:#08111f;color:#dbeafe;border-radius:26px;padding:30px;box-shadow:0 20px 50px #0f172a22}.hero-card p{color:#bbf7d0;font-family:Consolas,monospace}.section{padding:78px 0}.alt{background:#fff}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.cards>div,.steps>div,.notice{background:#fff;border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:0 10px 30px #0f172a0d}.notice{background:#fff7ed;color:#9a3412}.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.steps b{display:grid;place-items:center;width:42px;height:42px;border-radius:14px;background:#eff6ff;color:#2563eb}footer{background:#0f172a;color:#94a3b8;padding:28px 0}@media(max-width:900px){.hero-grid,.cards,.steps{grid-template-columns:1fr}nav{display:none}h1{font-size:38px}}