:root{--ink:#10213b;--muted:#63738c;--line:#e5ebf2;--soft:#f6f9fc;--blue:#0867d8;--blue2:#0d8cf2;--cyan:#09b9c5;--orange:#ff940d;--violet:#7157e8;--green:#18ad78;--shadow:0 24px 70px rgba(23,58,105,.12);--radius:22px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);font-family:Inter,"Noto Sans Bengali",sans-serif;background:#fff;line-height:1.65;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}img{display:block;max-width:100%}.container{width:min(1180px,calc(100% - 40px));margin:auto}.narrow{max-width:840px;text-align:center}.site-header{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.92);backdrop-filter:blur(18px);border-bottom:1px solid rgba(220,229,239,.85)}.nav-wrap{height:82px;display:flex;align-items:center;gap:34px}.brand img{width:144px;height:54px;object-fit:contain;object-position:left center}.main-nav{margin-left:auto;display:flex;align-items:center;gap:30px}.main-nav 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