body{
    margin:0;
    font-family:Arial, Helvetica, sans-serif;
    background:#f4f6f9;
}


.product-header{
    background:#3f4e63;
    color:white;
    padding:25px 60px;
    font-size:22px;
    font-weight:600;
}


.product-container{
    display:flex;
    align-items:flex-start;
    justify-content:space-between;
    max-width:1200px;
    margin:60px auto;
    gap:50px;
    padding:0 20px;
}


.product-info{
    flex:1;
}

.product-info h3{
    margin-bottom:20px;
    color:#333;
}

.product-info ul{
    padding-left:20px;
}

.product-info li{
    margin-bottom:12px;
    color:#555;
}


.product-image{
    flex:1;
    position:sticky;
    top:120px;
    text-align:center;
}

.product-image img{
    width:100%;
    max-width:450px;
    height:auto;
}


@media(max-width:900px){

    .product-container{
        flex-direction:column-reverse; 
        gap:30px;
        margin:30px auto;
    }

    .product-image{
        position:relative;
        top:auto;
    }

    .product-header{
        padding:20px;
        font-size:20px;
        text-align:center;
    }
}