:root {
    --primary: #4361ee;
    --secondary: #3f37c9;
    --dark: #1f2937;
    --light: #f9fafb;
    --gray: #6b7280;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: var(--dark);
    background-color: var(--light);
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 0;
}

/* Header Styles */
.header {
    background-color: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary);
    text-decoration: none;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 20px;
}

.nav-links a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--primary);
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 60px 0;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: var(--primary);
}

.hero p {
    font-size: 1.2rem;
    color: var(--gray);
}

/* Products Grid */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
    margin: 40px 0;
}

.product-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

.product-image {
    height: 200px;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}

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

.product-details {
    padding: 20px;
}

.product-details h3 {
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.product-details p {
    color: var(--gray);
    margin-bottom: 15px;
    font-size: 0.9rem;
}

.product-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.price {
    font-weight: 600;
    color: var(--primary);
    font-size: 1.2rem;
}

.btn-buy {
    background: var(--primary);
    color: white;
    padding: 8px 15px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 500;
    transition: background 0.3s;
}

.btn-buy:hover {
    background: var(--secondary);
}

/* Checkout Page */
.checkout-page {
    padding: 40px 0;
}

.checkout-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-top: 30px;
}

@media (max-width: 768px) {
    .checkout-container {
        grid-template-columns: 1fr;
    }
}

.product-summary {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.product-summary h2 {
    margin-bottom: 10px;
    color: var(--primary);
}

.product-summary .price {
    font-size: 1.5rem;
    margin-bottom: 20px;
    display: block;
}

.checkout-form {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: inherit;
}

.payment-options {
    display: flex;
    gap: 15px;
    margin-top: 10px;
}

.payment-options label {
    cursor: pointer;
    border: 1px solid #ddd;
    padding: 10px;
    border-radius: 5px;
    transition: border-color 0.3s;
}

.payment-options label:hover {
    border-color: var(--primary);
}

.payment-options img {
    height: 30px;
    display: block;
}

.btn-pay {
    width: 100%;
    background: var(--primary);
    color: white;
    border: none;
    padding: 12px;
    border-radius: 5px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.3s;
    margin-top: 20px;
}

.btn-pay:hover {
    background: var(--secondary);
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin: 40px 0;
}

.pagination a {
    display: inline-block;
    padding: 8px 15px;
    background: white;
    color: var(--dark);
    text-decoration: none;
    border-radius: 5px;
    transition: all 0.3s;
}

.pagination a.active,
.pagination a:hover {
    background: var(--primary);
    color: white;
}

/* Footer */
.footer {
    background: var(--dark);
    color: white;
    text-align: center;
    padding: 20px 0;
    margin-top: 60px;
}