body{
    margin:0;
    font-family:Arial,sans-serif;
    background:#f5fbff;
    color:#333;
}

.container{
    width:92%;
    max-width:1400px;
    margin:auto;
}

.topbar{
    background:white;
    box-shadow:0 2px 10px rgba(0,0,0,0.08);
    position:sticky;
    top:0;
    z-index:100;
}

.topbar .container{
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding:20px 0;
}

.logo{
    color:#2b7dbd;
    font-size:28px;
    font-weight:bold;
}

.menu{
    display:flex;
    gap:25px;
    flex-wrap:wrap;
}

.menu a{
    text-decoration:none;
    color:#2b7dbd;
    font-weight:bold;
}

.slider{
    position:relative;
    overflow:hidden;
    height:500px;
}

.slide{
    position:absolute;
    width:100%;
    height:100%;
    opacity:0;
    transition:opacity .8s;
}

.slide.active{
    opacity:1;
}

.slide img{
    width:100%;
    height:100%;
    object-fit:cover;
}

.brand-title{
    color:#2b7dbd;
    margin-top:50px;
}

.product{
    background:white;
    border-radius:18px;
    padding:30px;
    margin:30px 0;
    box-shadow:0 5px 25px rgba(0,0,0,0.08);
}

.product-header{
    margin-bottom:20px;
}

.product-content{
    display:flex;
    gap:40px;
}

.images{
    display:flex;
    gap:10px;
    flex-wrap:wrap;
    width:45%;
}

.thumb{
    width:calc(25% - 8px);
    border-radius:12px;
    cursor:pointer;
    transition:.2s;
}

.thumb:hover{
    transform:scale(1.03);
}

.details{
    flex:1;
}

.price{
    color:#2b7dbd;
    font-size:34px;
    font-weight:bold;
    margin-bottom:20px;
}

.details ul{
    list-style:none;
    padding:0;
    line-height:2;
}

.cart-btn{
    background:#4daff5;
    border:none;
    color:white;
    padding:16px 30px;
    border-radius:10px;
    font-size:18px;
    cursor:pointer;
}

.modal{
    display:none;
    position:fixed;
    z-index:999;
    padding-top:60px;
    left:0;
    top:0;
    width:100%;
    height:100%;
    background:rgba(0,0,0,0.9);
}

.modal-content{
    margin:auto;
    display:block;
    max-width:90%;
    max-height:85%;
}

.close{
    position:absolute;
    right:30px;
    top:20px;
    color:white;
    font-size:40px;
    cursor:pointer;
}

@media(max-width:900px){

    .product-content{
        flex-direction:column;
    }

    .images{
        width:100%;
    }

    .thumb{
        width:calc(50% - 5px);
    }

    .menu{
        gap:15px;
    }
}