:root{
    --primary:#165DBA;
    --primary-dark:#0F4790;
    --dark:#0F243D;
    --text:#222831;
    --text-light:#555;
    --light-bg:#f7f9fc;
    --white:#ffffff;
    --border:#dee2e6;
}

/* Product Hero Banner */
.product-hero{
    position:relative;
    min-height:220px;
    display:flex;
    align-items:center;
    color:#ffffff;
}
.product-hero-bg{
    position:absolute;
    inset:0;
    background:url("../images/banner.jpg") center/cover no-repeat;
    z-index:-1;
}
.product-hero-bg::after{
    content:"";
    position:absolute;
    inset:0;
    background-color:rgba(0,0,0,0.58);
}
.product-hero-inner{
    padding:30px 20px;
}
.bread-crumb{
    font-size:13px;
    opacity:0.85;
}
.bread-crumb a{
    color:#fff;
}

/* Main product top row image + info */
.product-main{
    padding:50px 0;
    background:#fff;
}
.product-top-row{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:40px;
    margin-bottom:45px;
}

/* Product Image Block */
.product-image-block{
    display:flex;
    flex-direction:column;
    gap:16px;
}
.main-img-wrap{
    position:relative;
    border:1px solid var(--border);
    border-radius:4px;
    overflow:hidden;
}
.main-product-img{
    width:100%;
    height:auto;
    display:block;
}
.zoom-icon{
    position:absolute;
    top:12px;
    right:12px;
    width:32px;
    height:32px;
    background:rgba(255,255,255,0.85);
    border-radius:50%;
    display:flex;
    align-items:center;
    justify-content:center;
    color:var(--primary);
}
.thumb-slider{
    display:flex;
    align-items:center;
    gap:8px;
}
.thumb-nav{
    width:30px;
    height:30px;
    border:1px solid var(--border);
    background:#fff;
    border-radius:3px;
    cursor:pointer;
}
.thumb-list{
    display:flex;
    gap:10px;
    overflow-x:auto;
}
.thumb-item{
    width:110px;
    height:85px;
    border:2px solid transparent;
    cursor:pointer;
}
.thumb-item.active{
    border-color:var(--primary);
}
.thumb-item img{
    width:100%;
    height:100%;
    object-fit:cover;
}

/* Product Info Block */
.product-info-block h1{
    font-size:26px;
    margin-bottom:10px;
}
.review-row{
    display:flex;
    align-items:center;
    gap:10px;
    margin-bottom:16px;
}
.star-rating{
    color:#f5b800;
}
.review-count{
    font-size:13px;
    color:var(--text-light);
}
.product-desc-short{
    font-size:14px;
    line-height:1.6;
    color:var(--text-light);
    margin-bottom:20px;
}
.feature-check-list{
    display:flex;
    flex-direction:column;
    gap:12px;
    margin-bottom:28px;
}
.feature-check-list li{
    display:flex;
    gap:10px;
}
.feature-check-list li i{
    color:var(--primary);
    margin-top:2px;
}
.feature-check-list strong{
    min-width:110px;
}
.feature-check-list span{
    font-size:13px;
    color:var(--text-light);
}
.action-buttons{
    display:flex;
    gap:14px;
    flex-wrap:wrap;
}
.btn-outline-blue{
    border:1px solid var(--primary);
    color:var(--primary);
    background:#fff;
    padding:10px 22px;
}

/* Product Tabs */
.product-tabs-wrap{
    border:1px solid var(--border);
    border-radius:4px;
    margin-bottom:50px;
}
.tab-nav{
    display:flex;
    border-bottom:1px solid var(--border);
}
.tab-btn{
    padding:14px 20px;
    background:transparent;
    border:none;
    font-size:14px;
    font-weight:600;
    color:var(--text-light);
    cursor:pointer;
    border-bottom:2px solid transparent;
}
.tab-btn.active{
    color:var(--primary);
    border-bottom-color:var(--primary);
}
.tab-content-wrap{
    padding:24px;
}
.tab-panel{
    display:none;
}
.tab-panel.active{
    display:block;
}
.two-col-tab{
    display:grid;
    grid-template-columns:1fr;
    gap:30px;
}
.tab-text-col p{
    font-size:14px;
    line-height:1.6;
    margin-bottom:14px;
}
.spec-check-list{
    display:flex;
    flex-direction:column;
    gap:8px;
}
.spec-check-list li{
    font-size:13px;
    display:flex;
    gap:8px;
}
.spec-check-list li i{
    color:var(--primary);
}
.tab-spec-col h4{
    font-size:16px;
    margin-bottom:14px;
}
.spec-table{
    width:100%;
    border-collapse:collapse;
}
.spec-table tr td{
    border-bottom:1px solid var(--border);
    padding:9px 6px;
    font-size:13px;
}
.spec-table tr td:first-child{
    font-weight:600;
    width:42%;
}

/* Related Products */
.related-title{
    text-align:center;
    font-size:18px;
    margin-bottom:30px;
}
.related-card-grid{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:20px;
}
.product-card{
    border:1px solid var(--border);
    border-radius:4px;
    overflow:hidden;
    padding-bottom:18px;
}
.product-img img{
    width:100%;
    height:170px;
    object-fit:cover;
}
.product-card h4{
    padding:12px 14px 6px;
    font-size:14px;
}
.product-card p{
    padding:0 14px 10px;
    font-size:13px;
    color:var(--text-light);
    line-height:1.4;
}
.link-btn{
    font-size:13px;
    color:var(--primary);
    font-weight:600;
    display:inline-flex;
    gap:6px;
    padding:0 14px;
}

/* Bottom CTA */
.product-bottom-cta{
    position:relative;
    padding:48px 0;
    color:#fff;
}
.bottom-cta-bg{
    position:absolute;
    inset:0;
    background-color:#0F243D;
    z-index:-1;
}
.bottom-cta-inner{
    display:flex;
    justify-content:space-between;
    align-items:center;
    gap:24px;
    flex-wrap:wrap;
}
.bottom-cta-inner h2{
    font-size:22px;
    margin-bottom:6px;
}
.bottom-cta-inner p{
    opacity:0.86;
}
.btn-white-outline{
    border:1px solid #fff;
    color:#fff;
    background:transparent;
    padding:10px 22px;
}

/* Responsive */
@media(max-width:1024px){
    .product-top-row{grid-template-columns:1fr;}
    .two-col-tab{grid-template-columns:1fr;}
    .related-card-grid{grid-template-columns:repeat(2,1fr);}
}
@media(max-width:768px){
    .product-info-block h1{font-size:22px;}
    .tab-nav{flex-wrap:wrap;}
    .related-card-grid{grid-template-columns:1fr;}
    .bottom-cta-inner{flex-direction:column;text-align:center;}
    .action-buttons{flex-direction:column;}
}