/* --- Global Styles --- */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

:root {
    --primary-color: #0a2540;
    --secondary-color: #c5a059;
    --accent-color: #635bff;
    --white: #ffffff;
    --bg-light: #f7f9fc;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    --transition: all 0.3s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Plus Jakarta Sans', sans-serif; }
body { background: var(--bg-light); color: var(--primary-color); line-height: 1.6; }

/* --- Header & Nav --- */
header {
    background: var(--white);
    height: 80px; /* ফিক্সড হাইট */
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 15px rgba(0,0,0,0.08);
}
.header-content {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo h1 { font-size: 1.5rem; font-weight: 800; color: var(--primary-color); }

#main-nav ul { display: flex; gap: 20px; list-style: none; }
#main-nav a { font-weight: 600; font-size: 0.95rem; color: var(--primary-color); transition: var(--transition); }
#main-nav a:hover { color: var(--secondary-color); }

.header-contact .btn {
    padding: 8px 20px; /* বাটন সাইজ ছোট করা হয়েছে */
    font-size: 0.9rem;
    border-radius: 50px;
}

/* --- Hero Section --- */
.hero {
    padding: 100px 0;
    background: linear-gradient(rgba(10, 37, 64, 0.85), rgba(10, 37, 64, 0.85)), url('https://images.unsplash.com/photo-1436491865332-7a61a1092e52?auto=format&fit=crop&w=1350&q=80');
    background-size: cover;
    background-position: center;
    color: var(--white);
    text-align: center;
}
.hero h2 { font-size: 3rem; font-weight: 800; margin-bottom: 15px; }
.hero p { font-size: 1.1rem; margin-bottom: 30px; opacity: 0.9; }

/* --- Service Cards --- */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    padding: 50px 0;
}
.service-card {
    background: var(--white);
    padding: 25px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}
.service-card:hover { transform: translateY(-8px); }
.service-card i { font-size: 2.5rem; color: var(--secondary-color); margin-bottom: 15px; }
.service-card h3 { font-size: 1.3rem; margin-bottom: 10px; }
.service-card p { font-size: 0.9rem; color: #666; margin-bottom: 20px; }

/* --- Buttons --- */
.btn { display: inline-block; padding: 12px 25px; font-weight: 700; cursor: pointer; border-radius: 8px; text-decoration: none; transition: var(--transition); border: none; }
.btn-primary { background: var(--primary-color); color: var(--white); }
.btn-gold { background: var(--secondary-color); color: var(--white); }
.btn-gold:hover { background: #b38f4d; }

/* --- Footer --- */
footer { background: var(--primary-color); color: var(--white); padding: 50px 0 20px; margin-top: 50px; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 30px; width: 90%; max-width: 1200px; margin: 0 auto; }
.copyright { text-align: center; padding-top: 30px; margin-top: 30px; border-top: 1px solid rgba(255,255,255,0.1); font-size: 0.85rem; }

/* Mobile Menu */
@media (max-width: 768px) {
    #main-nav { display: none; } /* আপাতত মোবাইল মেনু হাইড রাখা হয়েছে */
    .hero h2 { font-size: 2rem; }
}