:root{
  --navy:#0b2545;
  --navy-2:#13315c;
  --gold:#f4b400;
  --gold-dark:#d99e00;
  --ink:#0f172a;
  --muted:#5b6b83;
  --bg:#f7f9fc;
}

body{
  font-family: system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans Bengali",sans-serif;
  color: var(--ink);
  background: #fff;
}

/* ---------- Navbar ---------- */
.site-navbar{
  background: var(--navy);
  padding: .75rem 0;
  box-shadow: 0 2px 12px rgba(11,37,69,.15);
}
.site-navbar .nav-link{ color:#cbd5e1; font-weight:500; }
.site-navbar .nav-link:hover{ color:#fff; }
.brand-badge{
  display:inline-flex; align-items:center; justify-content:center;
  width:34px; height:34px; border-radius:9px;
  background: var(--gold); color: var(--navy);
  font-weight:800; font-size:12px; letter-spacing:.5px;
}
.btn-gold{
  background: var(--gold); color: var(--navy);
  border: none; font-weight:600;
}
.btn-gold:hover{ background: var(--gold-dark); color: var(--navy); }

/* ---------- Hero ---------- */
.hero{
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-2) 100%);
  color:#fff;
  padding: 90px 0 100px;
  position: relative;
  overflow: hidden;
}
.hero::after{
  content:""; position:absolute; right:-120px; top:-120px;
  width:420px; height:420px; border-radius:50%;
  background: radial-gradient(circle, rgba(244,180,0,.18), transparent 70%);
}
.hero-eyebrow{
  display:inline-block; padding:6px 14px; border-radius:20px;
  background: rgba(244,180,0,.15); color: var(--gold);
  font-size:13px; font-weight:600; letter-spacing:.3px;
  margin-bottom:20px;
}
.hero-title{
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800; line-height:1.15; margin-bottom:18px;
}
.text-gold{ color: var(--gold); }
.hero-sub{
  color:#cbd5e1; font-size:1.05rem; line-height:1.65; max-width:560px;
}
.hero-card{
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.12);
  border-radius:18px;
  padding: 28px;
  backdrop-filter: blur(6px);
}
.hero-card-title{
  font-weight:700; color:#fff; margin-bottom:16px; font-size:1.05rem;
}
.hero-list{ list-style:none; padding:0; margin:0; }
.hero-list li{
  padding:10px 0 10px 30px;
  position:relative;
  color:#e2e8f0; font-size:.95rem;
  border-bottom:1px solid rgba(255,255,255,.07);
}
.hero-list li:last-child{ border-bottom:none; }
.hero-list li::before{
  content:"✓"; position:absolute; left:0; top:10px;
  color: var(--gold); font-weight:700;
}

/* ---------- Sections ---------- */
.section{ padding: 80px 0; }
.section-alt{ background: var(--bg); }
.section-title{
  font-weight: 800; font-size: clamp(1.6rem, 3vw, 2.2rem);
  color: var(--navy);
}
.section-sub{ color: var(--muted); max-width: 560px; margin: 10px auto 0; }

/* ---------- Course cards ---------- */
.course-card{
  background:#fff;
  border: 1px solid #e7ecf3;
  border-radius: 16px;
  padding: 26px;
  height: 100%;
  transition: transform .2s ease, box-shadow .2s ease;
}
.course-card:hover{
  transform: translateY(-4px);
  box-shadow: 0 18px 40px rgba(11,37,69,.08);
}
.course-badge{
  display:inline-block; font-size:11px; font-weight:700;
  background: rgba(11,37,69,.08); color: var(--navy);
  padding: 5px 10px; border-radius: 6px; margin-bottom:14px;
  letter-spacing:.3px;
}
.course-name{
  font-size:1.4rem; font-weight:800; color: var(--navy); margin-bottom: 8px;
}
.course-desc{ color: var(--muted); font-size:.95rem; margin-bottom: 14px; }
.ask-about{ color: var(--navy-2); font-weight: 600; text-decoration: none; }
.ask-about:hover{ color: var(--gold-dark); }

/* ---------- Feature cards ---------- */
.feature-card{
  background:#fff; border-radius: 14px; padding: 24px;
  border: 1px solid #e7ecf3; height:100%;
}
.feature-title{
  font-size: 1.05rem; font-weight: 700; color: var(--navy); margin-bottom: 8px;
}
.feature-desc{ color: var(--muted); font-size: .92rem; margin:0; }

/* ---------- Contact card ---------- */
.contact-card{
  background:#fff; border-radius: 16px; padding: 30px;
  border: 1px solid #e7ecf3;
  box-shadow: 0 10px 30px rgba(11,37,69,.06);
}
.contact-row{
  display:flex; gap:12px; align-items:flex-start;
  padding: 10px 0; color: var(--muted); font-size:.95rem;
  border-bottom: 1px solid #f1f5f9;
}
.contact-row:last-child{ border-bottom:none; }

/* ---------- CTA ---------- */
.cta-section{
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-2) 100%);
  color:#fff; padding: 80px 0;
}
.cta-title{ font-weight: 800; font-size: clamp(1.6rem, 3vw, 2.2rem); margin-bottom: 12px; }
.cta-sub{ color:#cbd5e1; margin-bottom: 28px; max-width: 560px; margin-left:auto; margin-right:auto; }

/* ---------- Footer ---------- */
.site-footer{
  background: #071a33; color:#cbd5e1; padding: 60px 0 24px;
}
.footer-list{ list-style:none; padding:0; margin:0; }
.footer-list li{ padding:5px 0; font-size:.9rem; color:#94a3b8; }
.footer-list a{ color:#94a3b8; text-decoration:none; }
.footer-list a:hover{ color: var(--gold); }
.footer-hr{ border-color: rgba(255,255,255,.08); margin: 40px 0 20px; }

/* ---------- Responsive ---------- */
@media (max-width: 768px){
  .hero{ padding: 60px 0 70px; }
  .section{ padding: 60px 0; }
  .hero-card{ padding: 22px; }
}