/* =========================
   DDUTEC Unified Industrial Style
   Core: clean B2B layout + orange CTA + responsive product pages
========================= */

:root{
    --primary:#ff8800;
    --primary-dark:#ff6600;
    --dark:#0f172a;
    --text:#1e293b;
    --muted:#64748b;
    --line:#e5e7eb;
    --bg:#f4f5f7;
    --soft:#eef2ff;
    --white:#fff;
    --shadow:0 8px 24px rgba(15,23,42,0.08);
}

*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
    font-family:"Segoe UI",Arial,Helvetica,sans-serif;
    background:var(--bg);
    color:var(--text);
    line-height:1.8;
    font-size:16px;
}
img{max-width:100%;height:auto;display:block;}
a{text-decoration:none;color:inherit;}
ul{padding-left:20px;}
.container{width:100%;max-width:1200px;margin:auto;padding:0 20px;}
section{padding:80px 0;}
h1,h2,h3{color:var(--dark);font-weight:700;line-height:1.25;}
p{color:var(--muted);}

/* Header */
.header{
    position:sticky;
    top:0;
    z-index:999;
    background:rgba(255,255,255,0.96);
    border-bottom:2px solid var(--primary);
    box-shadow:0 2px 10px rgba(15,23,42,0.06);
    backdrop-filter:blur(8px);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:86px;padding:0 20px;}
.logo-block{display:flex;align-items:center;gap:12px;max-width:340px;flex-shrink:0;color:var(--text);}
.logo-block img{height:58px;width:auto;}
.company-name{font-size:15px;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.nav{display:flex;align-items:center;gap:24px;flex-wrap:wrap;justify-content:flex-end;}
.nav a{color:#334155;font-size:15px;font-weight:700;transition:0.25s;}
.nav a:hover,.nav a[aria-current="page"]{color:var(--primary);}
.quote-btn,.btn-primary,.product-btn,.inquiry-btn,.back-btn{
    background:var(--primary);
    color:#fff!important;
    border-radius:10px;
    font-weight:800;
    transition:0.25s;
    box-shadow:0 6px 16px rgba(255,136,0,0.22);
}
.quote-btn{padding:11px 24px;}
.quote-btn:hover,.btn-primary:hover,.product-btn:hover,.inquiry-btn:hover,.back-btn:hover{background:var(--primary-dark);transform:translateY(-2px);}

/* Hero */
.hero,.page-hero{
    position:relative;
    background:linear-gradient(135deg,#dff6ff 0%,#bfe8f8 48%,#eef2ff 100%);
    padding:130px 20px;
    overflow:hidden;
}
.hero:after,.page-hero:after{
    content:"";
    position:absolute;
    right:-120px;
    bottom:-120px;
    width:360px;
    height:360px;
    border-radius:50%;
    background:rgba(255,136,0,0.12);
}
.hero-content{position:relative;z-index:2;max-width:780px;margin:auto;text-align:center;}
.hero h1{font-size:52px;margin-bottom:24px;}
.hero p{font-size:20px;margin-bottom:34px;color:#334155;}
.hero-buttons{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;}
.btn-primary,.btn-secondary{display:inline-flex;align-items:center;justify-content:center;padding:14px 30px;border-radius:10px;font-weight:800;transition:0.25s;}
.btn-secondary{border:2px solid #fff;color:#fff;background:rgba(15,23,42,0.12);}
.btn-secondary:hover{background:#fff;color:var(--primary);transform:translateY(-2px);}
.dark-secondary{border-color:var(--dark);color:var(--dark);background:transparent;}
.dark-secondary:hover{background:var(--dark);color:#fff;}
.compact-hero{padding:70px 20px;text-align:center;}
.compact-hero h1{font-size:42px;margin-bottom:14px;}
.compact-hero p{max-width:760px;margin:auto;color:#334155;font-size:18px;}

/* Common blocks */
.section-title{text-align:center;margin-bottom:50px;}
.section-title h2{font-size:36px;margin-bottom:14px;}
.section-title p{max-width:760px;margin:auto;}
.about-box,.contact-card,.detail-section,.feature-box,.product-card{
    background:#fff;
    border-radius:16px;
    box-shadow:var(--shadow);
}
.about-box{padding:44px;}
.about-box p+p{margin-top:14px;}

/* Products */
.product-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:28px;}
.product-card{overflow:hidden;border:1px solid rgba(226,232,240,0.8);transition:0.25s;}
.product-card:hover{transform:translateY(-6px);box-shadow:0 14px 32px rgba(15,23,42,0.12);}
.product-card img{width:100%;height:220px;object-fit:cover;background:#f8fafc;}
.product-content{padding:24px;}
.product-content h3{margin-bottom:10px;font-size:21px;}
.product-content p{margin-bottom:18px;}
.product-btn{display:inline-block;padding:10px 22px;background:#1e293b;box-shadow:none;}

/* Features */
.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px;}
.feature-box{padding:32px;text-align:center;border:1px solid rgba(226,232,240,0.9);}
.feature-box h3{margin-bottom:10px;}

/* Contact */
.contact-layout{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(300px,0.85fr);gap:28px;align-items:start;}
.contact-card{padding:38px;border:1px solid rgba(226,232,240,0.9);}
.contact-card h2{font-size:28px;margin-bottom:14px;}
.contact-list{margin:24px 0;}
.contact-list p{margin-bottom:10px;color:var(--text);}
.contact-list a,.footer a:hover,.about-box a{color:var(--primary);}
.contact-actions{justify-content:flex-start;}
.muted-card{background:#f8fafc;}
.check-list{margin-top:16px;color:var(--text);}
.check-list li{margin-bottom:10px;}

/* Footer */
.footer{background:var(--dark);color:#cbd5e1;padding:52px 20px 30px;}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:36px;padding-bottom:28px;}
.footer h3{color:#fff;margin-bottom:14px;font-size:18px;}
.footer p{color:#cbd5e1;}
.footer a{display:block;color:#cbd5e1;margin-bottom:9px;transition:0.25s;}
.footer-bottom{text-align:center;color:#fff;margin-top:28px;font-size:14px;}
.whatsapp{position:fixed;right:20px;bottom:20px;background:#25D366;color:#fff;padding:14px 18px;border-radius:999px;font-weight:800;box-shadow:0 8px 22px rgba(0,0,0,0.22);z-index:999;}

/* Product detail page */
.detail-page{padding:60px 0;}
.detail-container{width:90%;max-width:1200px;margin:auto;}
.back-btn{display:inline-flex;align-items:center;gap:10px;padding:12px 26px;border:none;font-size:15px;cursor:pointer;margin-bottom:35px;}
.detail-top{display:flex;gap:50px;align-items:flex-start;flex-wrap:wrap;}
.detail-gallery,.detail-info{flex:1;min-width:320px;}
.detail-main-image{background:#fff;border-radius:16px;overflow:hidden;border:1px solid #eee;box-shadow:var(--shadow);}
.detail-main-image img{width:100%;cursor:pointer;transition:0.25s;}
.detail-main-image img:hover{transform:scale(1.02);}
.detail-thumbnails{display:flex;gap:14px;margin-top:18px;overflow-x:auto;padding-bottom:4px;}
.detail-thumbnails img{width:92px;height:92px;object-fit:cover;border-radius:10px;cursor:pointer;border:2px solid transparent;background:#fff;flex-shrink:0;transition:0.25s;}
.detail-thumbnails img:hover{border-color:var(--primary);transform:translateY(-3px);}
.detail-info h1{font-size:38px;margin-bottom:18px;}
.detail-info p{font-size:16px;line-height:1.9;}
.inquiry-btn{display:inline-block;margin-top:28px;padding:15px 36px;}
.detail-section{margin-top:58px;padding:42px;border:1px solid rgba(226,232,240,0.9);}
.detail-section h2{margin-bottom:26px;font-size:30px;}
.detail-features{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:20px;}
.detail-feature-item{background:#f8fafc;padding:24px;border-radius:12px;border:1px solid #eef2f7;transition:0.25s;}
.detail-feature-item:hover{transform:translateY(-5px);box-shadow:var(--shadow);}
.detail-spec-table{width:100%;border-collapse:collapse;}
.detail-spec-table tr:nth-child(even){background:#f8fafc;}
.detail-spec-table td{padding:15px 18px;border:1px solid var(--line);font-size:15px;}
.detail-spec-table td:first-child{width:320px;font-weight:800;background:#f1f5f9;color:var(--dark);}
.lightbox{position:fixed;inset:0;background:rgba(0,0,0,0.88);display:none;justify-content:center;align-items:center;z-index:9999;}
.lightbox img{max-width:90%;max-height:90%;border-radius:10px;}

@media(max-width:900px){
    .nav-wrap{flex-direction:column;align-items:center;padding:12px 16px;gap:10px;}
    .nav{justify-content:center;gap:14px;}
    .contact-layout{grid-template-columns:1fr;}
}

@media(max-width:768px){
    section{padding:56px 0;}
    .logo-block{justify-content:center;max-width:100%;gap:8px;}
    .logo-block img{height:48px;}
    .company-name{font-size:12px;max-width:180px;}
    .nav a{font-size:14px;}
    .quote-btn{padding:9px 16px;}
    .hero{padding:92px 20px;}
    .hero h1{font-size:34px;}
    .hero p{font-size:16px;}
    .hero-buttons{flex-direction:column;align-items:stretch;}
    .compact-hero h1{font-size:32px;}
    .section-title h2{font-size:30px;}
    .about-box,.contact-card,.detail-section{padding:24px;}
    .product-card img{height:200px;}
    .detail-info h1{font-size:28px;}
    .detail-spec-table{display:block;overflow-x:auto;white-space:nowrap;}
    .back-btn,.inquiry-btn{width:100%;justify-content:center;text-align:center;}
    .whatsapp{right:14px;bottom:14px;padding:12px 16px;font-size:14px;}
}