/* মোবাইল স্ক্রিন সাইজ ও জুম ফিক্স */
html {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: #0f172a; /* প্রিমিয়াম ডার্ক-ব্লু মডার্ন ব্যাকগ্রাউন্ড */
    color: #f8fafc;
    overflow-x: hidden;
}

/* গ্লাস ইফেক্ট হেডার */
header {
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 20px 50px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
}

header .logo {
    font-size: 26px;
    font-weight: 800;
    background: linear-gradient(135deg, #ff7e5f, #feb47b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 1px;
}

nav a {
    color: #cbd5e1;
    text-decoration: none;
    margin-left: 25px;
    font-size: 15px;
    font-weight: 500;
    transition: 0.3s;
}

nav a:hover {
    color: #ff7e5f;
}

.container {
    max-width: 1200px;
    margin: 40px auto;
    padding: 0 20px;
}

/* থ্রিডি হিরো সেকশন */
.hero-section {
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.9), rgba(15, 23, 42, 0.9)), url('https://images.unsplash.com/photo-1441986300917-64674bd600d8?w=1200') no-repeat center center/cover;
    color: #fff;
    padding: 120px 30px;
    text-align: center;
    border-radius: 20px;
    margin-bottom: 50px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transform: perspective(1000px);
    transition: transform 0.5s ease;
}

.hero-section:hover {
    transform: perspective(1000px) translateY(-5px);
}

.hero-section h1 {
    font-size: 48px;
    margin-bottom: 15px;
    font-weight: 800;
    text-shadow: 0 4px 10px rgba(0,0,0,0.3);
}

.hero-section p {
    font-size: 18px;
    margin-bottom: 30px;
    color: #94a3b8;
}

.hero-btn {
    background: linear-gradient(135deg, #ff7e5f, #feb47b);
    color: #fff;
    padding: 14px 35px;
    font-size: 16px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: bold;
    box-shadow: 0 10px 25px rgba(255, 126, 95, 0.4);
    transition: 0.3s ease;
    display: inline-block;
}

.hero-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(255, 126, 95, 0.6);
}

.section-title {
    text-align: center;
    font-size: 32px;
    margin-bottom: 40px;
    color: #f8fafc;
    font-weight: 700;
}

.section-title::after {
    content: '';
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, #ff7e5f, #feb47b);
    display: block;
    margin: 10px auto 0;
    border-radius: 2px;
}

/* ৩ডি কার্ড গ্রিড */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.product-card {
    background: rgba(30, 41, 59, 0.7);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 20px;
    border-radius: 16px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.3);
    text-align: center;
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    transform: translateY(0);
}

.product-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 25px 50px rgba(255, 126, 95, 0.15);
    border-color: rgba(255, 126, 95, 0.4);
}

.product-card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    border-radius: 12px;
    margin-bottom: 15px;
    transition: 0.3s;
}

.product-card:hover img {
    transform: scale(1.05);
}

.product-card h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: #f1f5f9;
}

.product-card p {
    color: #ff7e5f;
    font-weight: bold;
    font-size: 18px;
    margin-bottom: 20px;
}

.btn {
    background: linear-gradient(135deg, #ff7e5f, #feb47b);
    color: #fff;
    border: none;
    padding: 12px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 15px;
    text-decoration: none;
    display: inline-block;
    font-weight: 600;
    box-shadow: 0 5px 15px rgba(255, 126, 95, 0.3);
    transition: 0.3s;
    width: 100%;
}

.btn:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

.user-greeting {
    color: #feb47b;
    font-weight: bold;
    margin-left: 15px;
}

/* মোবাইল ডিভাইসের জন্য রেসপন্সিভ ফিক্স */
@media (max-width: 768px) {
    header {
        padding: 15px 20px;
        flex-direction: column;
        gap: 12px;
    }
    header nav {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 8px;
    }
    nav a {
        margin-left: 0;
        margin: 0 6px;
        font-size: 14px;
    }
    .hero-section {
        padding: 80px 20px;
    }
    .hero-section h1 {
        font-size: 32px;
    }
}