body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: #f8f9fa;
}

header {
    background: #343a40;
    color: white;
    padding: 20px;
    text-align: center;
}

nav ul {
    list-style: none;
    padding: 0;
    display: flex;
    justify-content: center;
    gap: 20px;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-size: 18px;
}

.container {
    width: 80%;
    max-width: 1200px;
    margin: auto;
    padding: 20px;
}

.product-list {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
}

.product {
    background: white;
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    width: 280px;
    text-align: center;
    transition: transform 0.3s ease;
}

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

.product img {
    width: 100%;
    border-radius: 8px;
}

.price {
    font-size: 18px;
    font-weight: bold;
    color: red;
}

button {
    background: #ff7e5f;
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s ease;
}

button:hover {
    background: #e76b50;
}

.cart {
    width: 300px;
    background: white;
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    text-align: center;
    margin: 30px auto;
}

.cart ul {
    list-style: none;
    padding: 0;
}

.popup-payment-box {
    background: white;
    width: 400px;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    text-align: center;
    margin: auto;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    opacity: 0;
    animation: fadeIn 0.3s forwards;
    z-index: 1000;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translate(-50%, -55%); }
    to { opacity: 1; transform: translate(-50%, -50%); }
}

.popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 999;
}

.payment-details {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 15px;
}

.payment-info {
    text-align: left;
}

.qr-code {
    width: 120px;
    height: auto;
}

footer {
    background: #343a40;
    color: white;
    text-align: center;
    padding: 10px 0;
    margin-top: 20px;
}
<style>
    .price {
        font-size: 18px;
        font-weight: bold;
        color: red;
        text-shadow: 2px 2px 5px rgba(255, 0, 0, 0.3);
        transition: transform 0.3s ease, color 0.3s ease;
    }

    .price:hover {
        transform: scale(1.1);
        color: darkred;
    }
</style>