/* রিসেট ও বেসিক */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, sans-serif;
}

body {
    background: #f4f7fc;
    color: #1e2a3a;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: auto;
}

/* হেডার */
header {
    background: #0b1a2e;
    color: white;
    padding: 18px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

header h1 {
    font-size: 1.8rem;
}

header h1 i {
    color: #00d4ff;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 25px;
    align-items: center;
}

nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: 0.3s;
}

nav a:hover {
    color: #00d4ff;
}

#cart-icon {
    background: #1e3a5f;
    padding: 8px 16px;
    border-radius: 30px;
}

#cart-count {
    background: #ff5e7c;
    padding: 2px 8px;
    border-radius: 50%;
    margin-left: 5px;
}

/* হিরো */
.hero {
    background: linear-gradient(135deg, #0b1a2e, #1a3b5c);
    color: white;
    padding: 80px 0;
    text-align: center;
}

.hero h2 {
    font-size: 2.8rem;
    margin-bottom: 15px;
}

.btn-primary {
    display: inline-block;
    background: #00d4ff;
    color: #0b1a2e;
    padding: 14px 35px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: bold;
    margin-top: 20px;
    transition: 0.3s;
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    background: #00b8e0;
    transform: scale(1.05);
}

/* প্রোডাক্ট গ্রিড */
.products {
    padding: 60px 0;
}

.products h2 {
    text-align: center;
    margin-bottom: 40px;
    font-size: 2.2rem;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.product-card {
    background: white;
    border-radius: 20px;
    padding: 25px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.06);
    text-align: center;
    transition: 0.3s;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.1);
}

.product-card i {
    font-size: 3rem;
    color: #0b1a2e;
    margin-bottom: 15px;
}

.product-card h3 {
    font-size: 1.4rem;
    margin-bottom: 10px;
}

.product-card p {
    color: #4a5a6e;
    margin-bottom: 15px;
}

.product-card .price {
    font-size: 1.5rem;
    font-weight: bold;
    color: #0b1a2e;
}

.product-card .btn-buy {
    background: #0b1a2e;
    color: white;
    border: none;
    padding: 10px 25px;
    border-radius: 30px;
    cursor: pointer;
    margin-top: 10px;
    transition: 0.3s;
}

.product-card .btn-buy:hover {
    background: #1e3a5f;
}

/* সম্পর্কে */
.about {
    background: #e6eef9;
    padding: 60px 0;
    text-align: center;
}

.about h2 {
    font-size: 2.2rem;
    margin-bottom: 15px;
}

/* যোগাযোগ */
.contact {
    padding: 60px 0;
    text-align: center;
}

.contact form {
    max-width: 500px;
    margin: 20px auto;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.contact input, .contact textarea {
    padding: 15px;
    border: 1px solid #ccd9e6;
    border-radius: 30px;
    font-size: 1rem;
}

.contact textarea {
    border-radius: 20px;
    height: 120px;
}

/* ফুটার */
footer {
    background: #0b1a2e;
    color: white;
    text-align: center;
    padding: 25px 0;
}

/* রেস্পন্সিভ */
@media (max-width: 700px) {
    header .container {
        flex-direction: column;
        gap: 10px;
    }
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
}