:root{--blue: #0c5aaf;--blue-dark: #084985;--blue-soft: #eaf3fc;--ink: #172126;--muted: #5f696b;--line: #e2e9ef;--soft: #f6f9fb;--white: #fff;--shadow: 0 10px 30px rgba(23, 33, 38, .08);--max: 1200px;font-family:Open Sans,Arial,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--muted);background:var(--white);line-height:1.62;font-size:15px}a{color:var(--blue);text-decoration:none}a:hover{color:var(--blue-dark)}img{max-width:100%;display:block}h1,h2,h3{color:var(--ink);line-height:1.2;margin:0 0 14px}h1{font-size:clamp(30px,3.4vw,50px)}h2{font-size:clamp(24px,2.2vw,34px)}h3{font-size:20px}p{margin:0 0 16px}.container{max-width:var(--max);margin:0 auto;padding:0 20px}.narrow{max-width:850px}.section{padding:62px 0}.section-soft{background:var(--soft)}.eyebrow{color:var(--blue);text-transform:uppercase;letter-spacing:.08em;font-size:12px;font-weight:700;margin-bottom:8px}.lead{font-size:18px;color:var(--ink);max-width:760px}.section-intro{max-width:860px;color:var(--ink);margin-bottom:24px}.tldr-section{padding-top:34px;padding-bottom:34px}.tldr-box{border:1px solid var(--line);background:var(--blue-soft);border-radius:6px;padding:24px}.tldr-list{margin:0;padding-left:20px;color:var(--ink)}.tldr-list li{margin-bottom:8px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:10px 22px;border-radius:3px;background:var(--blue);color:#fff;font-size:14px;font-weight:700;border:1px solid var(--blue);transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease}.btn:hover{background:var(--blue-dark);border-color:var(--blue-dark);color:#fff;transform:translateY(-1px)}.btn.secondary{background:#fff;color:var(--blue)}.text-link{font-weight:700}.actions,.card-actions{display:flex;gap:12px;flex-wrap:wrap;align-items:center}.mini-list{margin:0 0 14px;padding-left:18px;color:var(--ink);font-size:14px}.mini-list li{margin-bottom:4px}.site-header{position:sticky;top:0;z-index:20;background:#fffffffa;border-bottom:1px solid var(--line);box-shadow:0 2px 12px #1721260a;backdrop-filter:blur(10px)}.header-inner{max-width:var(--max);margin:0 auto;padding:13px 20px;display:flex;align-items:center;gap:24px}.brand img{height:48px;width:auto}.desktop-nav{display:flex;gap:20px;align-items:center;margin-left:auto}.desktop-nav a{color:var(--ink);font-size:14px;font-weight:700}.desktop-nav a.active,.desktop-nav a:hover{color:var(--blue)}.cart-link{border:1px solid var(--blue);padding:8px 13px;border-radius:3px;color:var(--blue);font-weight:700;font-size:13px}.cart-link:hover{background:var(--blue);color:#fff}.mobile-toggle{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:3px;background:#fff;margin-left:auto;padding:10px;cursor:pointer}.mobile-toggle span{display:block;height:2px;background:var(--ink);margin:5px 0;transition:transform .18s ease,opacity .18s ease}.mobile-nav{display:none;border-top:1px solid var(--line);background:#fff;padding:8px 20px 18px}.mobile-nav a{display:block;color:var(--ink);padding:11px 0;border-bottom:1px solid var(--line);font-weight:700}.mobile-nav a.active{color:var(--blue)}.mobile-nav .mobile-cta{margin-top:12px;padding:11px 14px;border:1px solid var(--blue);border-radius:5px;background:var(--blue);color:#fff;text-align:center}.site-header.menu-open .mobile-nav{display:block}.site-header.menu-open .mobile-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}.site-header.menu-open .mobile-toggle span:nth-child(2){opacity:0}.site-header.menu-open .mobile-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}.hero{padding:48px 0 58px}.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:46px;align-items:center}.hero-copy h1{color:var(--blue)}.hero-copy .actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.hero-media img{width:100%;aspect-ratio:4 / 3;object-fit:contain;border-radius:4px;box-shadow:var(--shadow)}.page-hero{padding:48px 0;background:var(--soft);border-bottom:1px solid var(--line)}.page-hero h1{color:var(--blue);max-width:940px}.breadcrumbs{font-size:13px;display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}.filter-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}.feature,.info-card{border:1px solid var(--line);background:#fff;border-radius:4px;padding:24px}.info-card{color:var(--muted)}.science-list,.cta-panel,.form-panel,.topic-panel{border:1px solid var(--line);background:#fff;border-radius:4px;padding:26px}.trust-badges{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0}.trust-badges span{border:1px solid var(--line);background:var(--blue-soft);color:var(--ink);border-radius:999px;padding:7px 12px;font-size:14px;font-weight:700}.science-list div{display:grid;gap:4px;padding:14px 0;border-bottom:1px solid var(--line)}.science-list div:last-child{border-bottom:0}.science-list strong{color:var(--ink)}.steps{margin:18px 0;padding-left:22px;color:var(--ink)}.steps li{margin-bottom:10px}.hub-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.hub-card{min-height:220px;border:1px solid var(--line);background:#fff;border-radius:4px;padding:24px;color:var(--muted);transition:border-color .18s ease,box-shadow .18s ease,transform .18s ease}.hub-card:hover{border-color:#0c5aaf59;box-shadow:var(--shadow);transform:translateY(-2px)}.hub-card span{display:block;color:var(--blue);font-weight:800;margin-bottom:18px}.hub-card h3{font-size:19px}.product-card,.article-card{background:#fff;border:1px solid var(--line);border-radius:4px;overflow:hidden;display:flex;flex-direction:column;transition:border-color .18s ease,box-shadow .18s ease,transform .18s ease}.product-card:hover,.article-card:hover{border-color:#0c5aaf40;box-shadow:var(--shadow);transform:translateY(-2px)}.product-image{aspect-ratio:1;display:flex;align-items:center;justify-content:center;padding:18px;background:#fbfdff;border-bottom:1px solid var(--line)}.product-image img{max-height:300px;object-fit:contain;transition:transform .2s ease}.product-card:hover .product-image img{transform:scale(1.03)}.product-card-body,.article-body{padding:22px;display:flex;flex-direction:column;flex:1}.product-card h2,.article-card h2{font-size:20px}.product-card-body>p:not(.eyebrow){font-size:14px}.product-card .card-actions{margin-top:auto}.product-card .btn{width:100%}.price{color:var(--blue);font-size:21px;margin:6px 0 16px}.article-image{aspect-ratio:16 / 10;overflow:hidden}.article-image img{width:100%;height:100%;object-fit:cover}.category-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}.category-row span{background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 12px;color:var(--ink);font-size:14px}.topic-row{margin-top:10px}.featured-article{display:grid;grid-template-columns:.95fr 1.05fr;gap:34px;align-items:center;border:1px solid var(--line);background:#fff;border-radius:6px;padding:22px}.featured-image{aspect-ratio:16 / 10;overflow:hidden;border-radius:5px;background:var(--soft)}.featured-image img{width:100%;height:100%;object-fit:cover}.filter-card{background:#fff;border:1px solid var(--line);border-radius:6px;padding:24px}.filter-card h2{color:var(--blue);font-size:22px}.filter-card dl{margin:16px 0 0}.filter-card dt{color:var(--ink);font-weight:700;margin-top:12px}.filter-card dd{margin:4px 0 0}.form-panel form{display:grid;gap:14px}.form-panel label{display:grid;gap:6px;color:var(--ink);font-weight:700}.form-panel input,.form-panel select,.form-panel textarea{width:100%;border:1px solid var(--line);border-radius:5px;padding:11px 12px;font:inherit;color:var(--ink)}.form-panel .check{display:flex;align-items:center;gap:8px;font-weight:400}.form-panel .check input{width:auto}.form-note{font-size:13px;color:var(--muted)}.product-detail{display:grid;grid-template-columns:minmax(0,.96fr) minmax(0,1.04fr);gap:48px;align-items:start}.product-detail .main-image{border:1px solid var(--line);border-radius:6px;padding:34px;background:#fff}.product-detail .main-image img{width:100%;aspect-ratio:1;object-fit:contain}.spec-table{width:100%;border-collapse:collapse;margin-top:24px}.spec-table th,.spec-table td{border-bottom:1px solid var(--line);padding:11px 0;text-align:left;vertical-align:top}.spec-table th{color:var(--ink);width:38%}.table-wrap{width:100%;overflow-x:auto;border:1px solid var(--line);border-radius:6px;background:#fff}.compare-table{width:100%;min-width:860px;border-collapse:collapse}.compare-table th,.compare-table td{border-bottom:1px solid var(--line);padding:13px 14px;text-align:left;vertical-align:top}.compare-table thead th{color:var(--blue);background:var(--blue-soft);font-size:14px}.compare-table tbody th{color:var(--ink)}.compare-table tr:last-child th,.compare-table tr:last-child td{border-bottom:0}.article-content{font-size:17px}.article-content img{border-radius:6px;margin:28px 0}.article-content h2{margin-top:34px;color:var(--blue)}.article-tldr,.context-links,.related-products{border:1px solid var(--line);border-radius:6px;background:var(--soft);padding:20px;margin:24px 0}.article-tldr h2,.context-links h2,.related-products h2{font-size:24px}.related-product-list{display:flex;flex-wrap:wrap;gap:10px}.related-product-list a{border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 12px;font-weight:700}.faq-item{border:1px solid var(--line);border-radius:6px;padding:16px 18px;margin-bottom:10px;background:#fff}.faq-item summary{color:var(--ink);font-weight:700;cursor:pointer}.site-footer{background:#f7f9fb;color:var(--muted);padding:50px 0 22px;border-top:1px solid #e6eef5}.footer-grid{display:grid;grid-template-columns:1.35fr .9fr 1fr 1.05fr;gap:38px}.footer-logo{height:46px;width:auto;margin-bottom:16px}.footer-kicker{color:var(--blue);font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase}.site-footer h2{color:var(--blue);font-size:14px;text-transform:uppercase;letter-spacing:.04em}.site-footer a{display:block;color:#4f5858;margin-bottom:8px}.site-footer a:hover{color:var(--blue)}.social-links{display:flex;gap:12px;flex-wrap:wrap;margin-top:12px}.social-links a{font-weight:700}.footer-bottom{display:flex;justify-content:space-between;gap:18px;border-top:1px solid #dfe8ef;margin-top:34px;padding-top:18px;font-size:13px}@media (max-width: 900px){.desktop-nav,.cart-link{display:none}.mobile-toggle{display:block}.header-inner{padding:12px 20px;gap:16px}.brand img{height:42px}.hero-grid,.product-detail,.grid-2,.grid-3,.hub-grid,.filter-grid,.footer-grid,.featured-article{grid-template-columns:1fr}.section{padding:48px 0}.hero{padding:36px 0 46px}.hub-card{min-height:auto}}