/* আপনার লোগো কালার কোড ব্যবহার করা হয়েছে */
:root {
    --primary-color: #1F3C90;
    --dark-bg: #111827;
    --white: #ffffff;
    --light-gray: #f3f4f6;
    --orange: #ff9900;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Segoe UI', Arial, sans-serif; }
body { background: var(--light-gray); color: #333; line-height: 1.6; }
.container { max-width: 1200px; margin: auto; padding: 0 20px; }

/* Navigation */
header { background: var(--white); box-shadow: 0 2px 10px rgba(0,0,0,0.1); position: sticky; top: 0; z-index: 1000; padding: 15px 0; }
.nav-bar { display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 26px; font-weight: 800; color: var(--primary-color); letter-spacing: 1px; }
.logo span { color: #333; }
nav ul { display: flex; list-style: none; }
nav ul li { margin-left: 25px; }
nav ul li a { text-decoration: none; color: #444; font-weight: 600; transition: 0.3s; }
nav ul li a:hover { color: var(--primary-color); }

/* Hero Section */
.hero { 
    height: 450px; 
    background: linear-gradient(rgba(31, 60, 144, 0.8), rgba(0, 0, 0, 0.7)), url('https://images.unsplash.com/photo-1519389950473-47ba0277781c?auto=format&fit=crop&q=80&w=1500');
    background-size: cover; background-position: center;
    display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; color: var(--white); padding: 0 20px;
}
.hero h1 { font-size: 3rem; margin-bottom: 15px; }
.btn-main { background: var(--orange); color: white; padding: 12px 35px; text-decoration: none; font-weight: bold; border-radius: 5px; transition: 0.3s; }

/* Product Detail Design */
.main-product-box { display: flex; gap: 40px; padding: 50px 0; align-items: flex-start; }
.image-gallery { flex: 1.2; }
.main-img-container { 
    position: relative; overflow: hidden; border: 1px solid #ddd; 
    border-radius: 12px; height: 450px; background: #fff; 
    display: flex; align-items: center; justify-content: center;
}
.zoom-effect { width: 100%; height: 100%; object-fit: contain; transition: 0.5s ease; cursor: zoom-in; }
.main-img-container:hover .zoom-effect { transform: scale(1.4); }

.sample-images { display: flex; gap: 15px; margin-top: 20px; justify-content: center; }
.sample-images img { 
    width: 80px; height: 80px; border: 2px solid #eee; border-radius: 8px;
    cursor: pointer; object-fit: contain; padding: 5px; transition: 0.3s;
}
.sample-images img.active-sample { border-color: var(--primary-color); }

.product-details-text { flex: 1; }
.badge { background: #ff9900; color: #fff; padding: 4px 12px; border-radius: 20px; font-size: 0.8rem; font-weight: bold; }
.pricing { margin: 15px 0; }
.old-price { text-decoration: line-through; color: #999; margin-right: 10px; }
.new-price { color: #e63946; font-size: 2rem; font-weight: bold; }
.save-tag { background: #e6fffa; color: #38b2ac; padding: 2px 8px; border-radius: 5px; border: 1px dashed; }

.features-box { margin: 20px 0; }
.features-box ul { list-style: none; }
.features-box li { margin-bottom: 10px; }

.buy-btn { 
    width: 100%; background: #25D366; color: #fff; padding: 15px; border: none; 
    border-radius: 8px; font-size: 1.2rem; cursor: pointer; transition: 0.3s; 
}
.buy-btn:hover { background: #128C7E; }

/* Contact & Footer */
.contact-section { padding: 60px 0; text-align: center; }
.footer { background: #111827; color: white; padding: 40px 0; margin-top: 50px; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 30px; }
.footer-bottom { text-align: center; padding-top: 20px; border-top: 1px solid #333; margin-top: 20px; }

@media (max-width: 768px) {
    .main-product-box { flex-direction: column; }
    .main-img-container { height: 320px; }
}