:root{ --blue:#0b44a6; --red:#d82929; --text:#111; --muted:#6b7280; --border:#e5e7eb; --bg:#fff; }
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:Tahoma,'Noto Sans Thai','Sarabun',system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,'Helvetica Neue',Arial,sans-serif;line-height:1.6}
.container{max-width:1120px;margin:0 auto;padding:16px}
/* Header */
.site-header{position:sticky;top:0;background:rgba(255,255,255,.95);box-shadow:0 2px 10px rgba(0,0,0,.08);z-index:10;backdrop-filter:blur(10px)}
.header-inner{display:flex;align-items:center;gap:16px;padding:12px 16px}
.brand{display:flex;align-items:center}
.logo{width:200px;height:auto;object-fit:contain;transition:transform .3s ease}
.logo:hover{transform:scale(1.02)}
.nav{margin-left:auto;display:flex;gap:8px;align-items:center}
.nav-link{color:var(--text);text-decoration:none;font-weight:600;padding:10px 18px;border-radius:8px;transition:all .3s ease;position:relative}
.nav-link:hover{background:var(--blue);color:#fff;transform:translateY(-2px)}
.lang-switcher{background:var(--blue);color:#fff;border:none;padding:8px 16px;border-radius:8px;font-weight:700;cursor:pointer;transition:all .3s ease;font-size:14px;margin-left:8px}
.lang-switcher:hover{background:#0d5bc6;transform:scale(1.05)}
.hamburger{display:none;margin-left:8px;background:none;border:none;font-size:24px;cursor:pointer;color:var(--blue);padding:8px;border-radius:6px;transition:background .3s ease}
.hamburger:hover{background:var(--border)}
@media(max-width:820px){ .nav{display:none} .hamburger{display:block} }
/* Hero Slider */
.hero.white{background:#fff}
.slider{position:relative;border-radius:14px;overflow:hidden;box-shadow:0 10px 30px rgba(0,0,0,.06)}
.slide{display:none}
.slide.active{display:block}
.slide img{width:100%;height:400px;object-fit:cover;background:#fff}
.slider .prev,.slider .next{position:absolute;top:50%;transform:translateY(-50%);border:none;background:rgba(0,0,0,.45);color:#fff;font-size:28px;width:40px;height:40px;border-radius:50%;cursor:pointer}
.slider .prev{left:10px}.slider .next{right:10px}
/* Page Banner */
.page-banner{width:100%;overflow:hidden;background:#f5f5f5}
.page-banner img{width:100%;height:auto;display:block}
/* Categories */
.section h2{color:var(--blue);margin:18px 0 10px}
.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
@media(max-width:1024px){.cat-grid{grid-template-columns:repeat(2,1fr)}}
.cat-card{border:1px solid var(--border);border-radius:14px;overflow:hidden;text-decoration:none;color:inherit;background:#fff;box-shadow:0 6px 18px rgba(0,0,0,.04)}
.cat-card .thumb{aspect-ratio:1/1;overflow:hidden;background:#fafafa}
.cat-card img{width:100%;height:100%;object-fit:cover;display:block}
.cat-card h3{margin:10px 12px;color:#111}
/* Products layout */
.products-layout{display:grid;grid-template-columns:260px 1fr;gap:24px;margin-top:8px}
@media(max-width:1000px){.products-layout{grid-template-columns:1fr}}
.sidebar{border:1px solid var(--border);border-radius:12px;padding:12px;height:max-content}
.side-list{list-style:none;padding:0;margin:6px 0}
.side-list li{margin:6px 0}
.side-list a{text-decoration:none;color:var(--blue);font-weight:700}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media(max-width:1000px){.grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.grid{grid-template-columns:1fr}}
.card{border:1px solid var(--border);border-radius:14px;overflow:hidden;background:#fff;box-shadow:0 6px 18px rgba(0,0,0,.04)}
.card .media{aspect-ratio:1/1;background:#fafafa;display:flex;align-items:center;justify-content:center;overflow:hidden}
.card img{width:100%;height:100%;object-fit:cover}
.card .body{padding:12px}
.card .title{margin:0 0 4px 0;font-weight:700}
.card .meta{font-size:14px;color:var(--muted)}
.btn{appearance:none;border:none;cursor:pointer;background:var(--blue);color:#fff;border-radius:10px;padding:10px 14px;font-weight:700}
.btn.outline{background:#fff;color:var(--blue);border:1px solid var(--blue)}
.btn.primary{background:var(--blue)}
/* Product detail */
.detail-header{display:grid;grid-template-columns:1fr 1fr;gap:24px}
@media(max-width:900px){.detail-header{grid-template-columns:1fr}}
.gallery{display:flex;flex-direction:column;gap:12px}
.gallery-main{width:100%;aspect-ratio:1/1;background:#fafafa;border-radius:12px;overflow:hidden;box-shadow:0 6px 18px rgba(0,0,0,.08)}
.gallery-main img{width:100%;height:100%;object-fit:cover;display:block}
.gallery-thumbs{display:flex;gap:10px;overflow-x:auto;padding:4px 0}
.gallery-thumbs::-webkit-scrollbar{height:6px}
.gallery-thumbs::-webkit-scrollbar-track{background:var(--border);border-radius:3px}
.gallery-thumbs::-webkit-scrollbar-thumb{background:var(--blue);border-radius:3px}
.gallery-thumbs .thumb{width:80px;height:80px;object-fit:cover;border-radius:8px;cursor:pointer;border:2px solid transparent;transition:all .3s ease;flex-shrink:0}
.gallery-thumbs .thumb:hover{border-color:var(--blue);transform:scale(1.05)}
.gallery-thumbs .thumb.active{border-color:var(--blue);box-shadow:0 0 0 2px rgba(11,68,166,.2)}
/* Contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
@media(max-width:900px){.contact-grid{grid-template-columns:1fr}}
.contact-form label{display:block;margin-bottom:10px;font-weight:700}
.contact-form input,.contact-form textarea{width:100%;padding:10px;border:1px solid var(--border);border-radius:8px;margin-top:6px}
.map-wrap iframe{width:100%;height:320px;border:0;border-radius:12px}
/* Footer 3 columns */
.site-footer{border-top:1px solid var(--border);margin-top:40px;background:#fafafa}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:24px;padding:16px 0}
@media(max-width:900px){.footer-grid{grid-template-columns:1fr}}
.footer-logo{width:200px;height:auto;margin-bottom:8px}
.footer-list{list-style:none;padding:0;margin:0}
.footer-list li{margin:6px 0}
.footer-list a{text-decoration:none;color:var(--blue)}
.highlight img{width:100%;max-height:200px;object-fit:cover;border-radius:12px;box-shadow:0 6px 18px rgba(0,0,0,.06)}
.copyright{border-top:1px solid var(--border);padding:10px 0;color:var(--muted);text-align:center}
/* Modal Popup */
.modal{display:none;position:fixed;z-index:999;left:0;top:0;width:100%;height:100%;background:rgba(0,0,0,.5);backdrop-filter:blur(5px);animation:fadeIn .3s ease}
.modal.active{display:flex;align-items:center;justify-content:center}
.modal-content{background:#fff;border-radius:16px;max-width:500px;width:90%;max-height:90vh;overflow-y:auto;box-shadow:0 20px 60px rgba(0,0,0,.3);animation:slideUp .3s ease;position:relative;padding:32px 24px}
.modal-close{position:absolute;right:20px;top:20px;font-size:32px;font-weight:700;color:var(--muted);cursor:pointer;transition:all .3s ease;line-height:1;width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:50%}
.modal-close:hover{color:var(--red);background:var(--border);transform:rotate(90deg)}
.modal h2{margin:0 0 20px 0;color:var(--blue);font-size:24px}
.modal-body{display:grid;gap:16px;margin:20px 0}
.contact-card{display:flex;gap:16px;padding:16px;background:var(--bg);border:1px solid var(--border);border-radius:12px;transition:all .3s ease}
.contact-card:hover{box-shadow:0 6px 18px rgba(0,0,0,.08);transform:translateY(-2px);border-color:var(--blue)}
.contact-card.full{grid-column:1/-1}
.contact-card .icon{font-size:32px;width:50px;height:50px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--blue),#0d5bc6);border-radius:12px;flex-shrink:0}
.contact-card .info h4{margin:0 0 6px 0;color:var(--blue);font-size:16px}
.contact-card .info p{margin:0;color:var(--text);font-size:14px;line-height:1.5}
.contact-card .info a{color:var(--blue);text-decoration:none;font-weight:600;transition:color .3s ease}
.contact-card .info a:hover{color:#0d5bc6;text-decoration:underline}
.modal-footer{margin-top:24px;text-align:center;padding-top:20px;border-top:1px solid var(--border)}
.modal-footer .btn{width:100%;padding:14px}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes slideUp{from{transform:translateY(30px);opacity:0}to{transform:translateY(0);opacity:1}}
/* About Page */
.about-section h1{color:var(--blue);margin-bottom:24px}
.about-content{background:#fff;padding:28px;border-radius:12px;box-shadow:0 4px 12px rgba(0,0,0,.06);margin-bottom:24px}
.about-content h2{color:var(--blue);margin:0 0 12px 0;font-size:22px}
.about-content h3{color:var(--blue);margin:0 0 16px 0;font-size:20px}
.about-content .company-name{color:var(--text);font-weight:600;margin:0 0 8px 0;font-size:16px}
.about-content .location{color:var(--muted);margin:0 0 20px 0}
.about-content p{line-height:1.8;margin:16px 0;color:var(--text)}
.about-content .highlight{font-size:18px;color:var(--blue);margin:20px 0}
.about-content .tagline{color:var(--blue);font-size:18px;margin:24px 0 0 0;padding:20px;background:linear-gradient(135deg,rgba(11,68,166,.05),rgba(11,68,166,.1));border-left:4px solid var(--blue);border-radius:8px}
.divider{border:none;border-top:2px solid var(--border);margin:32px 0}
.about-english{background:linear-gradient(135deg,#f8f9fa,#fff)}
/* Product Table */
.product-table{width:100%;border-collapse:collapse;margin:20px 0;background:#fff;border-radius:8px;overflow:hidden;box-shadow:0 2px 8px rgba(0,0,0,.06)}
.product-table thead{background:var(--blue);color:#fff}
.product-table th{padding:12px 16px;text-align:left;font-weight:600}
.product-table td{padding:10px 16px;border-bottom:1px solid var(--border)}
.product-table tbody tr:last-child td{border-bottom:none}
.product-table tbody tr:hover{background:#f8f9fa}
.specs{margin:24px 0;padding:20px;background:#f8f9fa;border-radius:8px;border-left:4px solid var(--blue)}
.specs h4{color:var(--blue);margin:0 0 12px 0}
.specs p{margin:8px 0;line-height:1.6}