:root{--navy:#2b475e;--yellow:#FFD53B;--light:#EBEBEB;--blue:#0c65a9;--green:#6AC335;--ink:#183044;--muted:#667786;--white:#fff;--radius:16px;--shadow:0 18px 50px rgba(25,49,69,.12)}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:#fff}
a{color:inherit}
.site-head{height:78px;display:flex;align-items:center;justify-content:space-between;padding:0 max(24px,calc((100vw - 1240px)/2));border-bottom:1px solid #e6eaed;position:sticky;top:0;background:rgba(255,255,255,.96);backdrop-filter:blur(12px);z-index:40}
.logo{display:flex;align-items:center;gap:11px;text-decoration:none;font-weight:850;font-size:20px;color:var(--navy)}
.logo span,.brand-mark{width:42px;height:42px;display:grid;place-items:center;background:var(--yellow);color:var(--navy);border-radius:11px;font-weight:950;font-size:24px}
.site-head nav{display:flex;align-items:center;gap:25px}
.site-head nav>a{text-decoration:none;font-weight:650;font-size:14px}
.cart-button{border:0;background:var(--navy);color:#fff;padding:11px 15px;border-radius:10px;font-weight:750;cursor:pointer}
.cart-button b{display:inline-grid;place-items:center;background:var(--yellow);color:var(--navy);border-radius:999px;min-width:23px;height:23px;margin-left:8px}
.hero{max-width:1240px;margin:auto;padding:72px 24px 56px;display:grid;grid-template-columns:1.45fr .75fr;gap:70px;align-items:center}
.hero:before{content:"";position:absolute;left:0;right:0;top:78px;height:470px;background:linear-gradient(120deg,#f3f5f6 10%,#fff 75%);z-index:-1}
.hero h1{font-size:clamp(42px,5.5vw,72px);line-height:1.02;letter-spacing:-.045em;max-width:800px;margin:14px 0 24px;color:var(--navy)}
.hero-copy>p{font-size:20px;line-height:1.65;color:var(--muted);max-width:700px}
.eyebrow{font-size:12px;letter-spacing:.13em;text-transform:uppercase;font-weight:850;color:var(--blue)}
.btn{display:inline-flex;justify-content:center;align-items:center;border:0;border-radius:10px;padding:13px 18px;font:inherit;font-weight:800;text-decoration:none;cursor:pointer}
.btn.primary{background:var(--yellow);color:var(--navy);box-shadow:0 8px 20px rgba(255,213,59,.25)}
.hero .btn{margin-top:12px;padding:16px 24px}
.hero-card{background:var(--navy);color:#fff;border-radius:24px;padding:32px;box-shadow:var(--shadow)}
.hero-card>b{font-size:20px}
.hero-card ol{list-style:none;padding:10px 0;margin:12px 0}
.hero-card li{display:flex;align-items:center;gap:14px;border-bottom:1px solid rgba(255,255,255,.14);padding:14px 0;font-weight:700}
.hero-card li span{width:30px;height:30px;display:grid;place-items:center;background:var(--yellow);color:var(--navy);border-radius:50%}
.trust{color:#d9e5ee;font-size:13px;margin-top:18px}
.catalog-section{max-width:1288px;margin:auto;padding:70px 24px}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:24px}
.section-head h2,.how h2{font-size:40px;letter-spacing:-.03em;margin:7px 0}
.section-head p{color:var(--muted);margin:0}
.search{display:flex;border:1px solid #d6dde2;border-radius:11px;overflow:hidden;min-width:370px}
.search input{border:0;padding:13px 15px;flex:1;font:inherit;outline:none}
.search button{border:0;background:var(--navy);color:#fff;padding:0 18px;font-weight:700}
.chips{display:flex;gap:8px;overflow:auto;padding:28px 0 24px}
.chips a{white-space:nowrap;text-decoration:none;background:#f0f2f3;padding:9px 13px;border-radius:99px;font-size:13px;font-weight:700}
.chips a.on{background:var(--navy);color:white}
.chips small{opacity:.65;margin-left:4px}
.product-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.product-card{border:1px solid #e0e5e8;border-radius:15px;overflow:hidden;display:flex;flex-direction:column;background:#fff;transition:.2s}
.product-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:transparent}
.product-image{height:235px;display:grid;place-items:center;background:#f5f6f7;color:#8796a2;overflow:hidden}
.product-image img{width:100%;height:100%;object-fit:contain;mix-blend-mode:multiply}
.product-body{padding:18px;display:flex;flex-direction:column;flex:1}
.product-body>small{color:var(--blue);font-weight:750;text-transform:uppercase;font-size:11px;letter-spacing:.08em}
.product-body h3{font-size:16px;line-height:1.4;margin:8px 0}
.product-body h3 a{text-decoration:none}
.sku{font-size:12px;color:var(--muted)}
.price-row{display:flex;align-items:center;justify-content:space-between;margin:auto 0 14px;padding-top:15px}
.price-row strong{font-size:19px;color:var(--navy)}
.price-row span{font-size:11px;color:#3d7b20}
.cart-add{width:100%;background:var(--navy);color:white;font-size:13px}
.pagination{display:flex;gap:7px;justify-content:center;margin-top:34px}
.pagination a{padding:8px 12px;border-radius:8px;background:#eee;text-decoration:none}
.pagination a.on{background:var(--navy);color:#fff}
.how{background:var(--light);padding:75px max(24px,calc((100vw - 1240px)/2))}
.how>div{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:30px}
.how article{background:#fff;border-radius:16px;padding:28px}
.how article>b{font-size:32px;color:var(--yellow);-webkit-text-stroke:1px var(--navy)}
.how h3{font-size:20px}
.how p{color:var(--muted);line-height:1.6}
.site-footer{background:var(--navy);color:white;padding:50px max(24px,calc((100vw - 1240px)/2));display:flex;justify-content:space-between}
.logo.light{color:#fff}
.site-footer>div{display:flex;flex-direction:column;gap:10px}
.site-footer a{text-decoration:none}
.site-footer p{color:#c8d3dc}
.drawer-backdrop{position:fixed;inset:0;background:rgba(12,27,39,.55);z-index:80;opacity:0;pointer-events:none;transition:.25s}
.cart-drawer{position:fixed;right:0;top:0;bottom:0;width:min(470px,100%);background:#fff;z-index:90;transform:translateX(101%);transition:.28s;display:flex;flex-direction:column;box-shadow:-20px 0 60px rgba(0,0,0,.2)}
.cart-is-open .drawer-backdrop{opacity:1;pointer-events:auto}
.cart-is-open .cart-drawer{transform:none}
.cart-drawer>header{padding:25px;border-bottom:1px solid #e5e8ea;display:flex;justify-content:space-between}
.cart-drawer h2{margin:5px 0 0}
.icon-btn,.dialog-close{border:0;background:#edf0f2;width:39px;height:39px;border-radius:50%;font-size:24px;cursor:pointer}
.cart-items{padding:15px 25px;overflow:auto;flex:1}
.cart-items article{display:grid;grid-template-columns:72px 1fr 30px;gap:13px;padding:14px 0;border-bottom:1px solid #e8ebed}
.cart-thumb{height:72px;background:#f2f3f4;display:grid;place-items:center;border-radius:9px;overflow:hidden}
.cart-thumb img{width:100%;height:100%;object-fit:contain}
.cart-items b{display:block;font-size:14px}
.cart-items small{display:block;color:var(--muted);margin:4px 0}
.cart-items label{font-size:12px}
.cart-items input{width:65px;margin-left:6px;padding:5px}
.cart-items article>button{border:0;background:none;font-size:22px;cursor:pointer}
.cart-empty{text-align:center;margin:auto;padding:30px}
.cart-empty>div{font-size:44px}
.cart-drawer>footer{padding:22px 25px;border-top:1px solid #e5e8ea}
.full{width:100%}
.cart-drawer footer small{display:block;text-align:center;margin-top:10px;color:var(--muted)}
.inquiry-modal{border:0;border-radius:20px;padding:34px;width:min(650px,calc(100% - 30px));box-shadow:0 30px 90px rgba(0,0,0,.28);color:var(--ink)}
.inquiry-modal::backdrop{background:rgba(18,35,48,.7)}
.dialog-close{float:right}
.inquiry-modal h2{font-size:31px;margin:8px 0}
.inquiry-modal>p{color:var(--muted);line-height:1.5}
.stack,.inquiry-modal form{display:grid;gap:15px}
.two{display:grid;grid-template-columns:1fr 1fr;gap:13px}
label{font-size:13px;font-weight:700;display:grid;gap:6px}
input,textarea,select{border:1px solid #ccd5db;border-radius:8px;padding:11px 12px;font:inherit;color:var(--ink)}
.consent{grid-template-columns:auto 1fr;align-items:start;font-weight:400;line-height:1.45}
.consent input{margin-top:3px}
.form-ok,.form-error{padding:10px;margin-top:8px;border-radius:8px}
.form-ok{background:#edf8e9;color:#326d19}
.form-error,.alert.error{background:#fff0ee;color:#a52d21}
.breadcrumbs{max-width:1240px;margin:25px auto;padding:0 24px;display:flex;gap:9px;color:var(--muted);font-size:13px}
.product-detail{max-width:1240px;margin:0 auto;padding:25px 24px 70px;display:grid;grid-template-columns:1fr 1fr;gap:70px}
.detail-image{min-height:520px;background:#f4f5f6;border-radius:20px;display:grid;place-items:center;overflow:hidden}
.detail-image img{width:100%;height:100%;max-height:600px;object-fit:contain;mix-blend-mode:multiply}
.detail-copy h1{font-size:44px;line-height:1.08;letter-spacing:-.03em;color:var(--navy)}
.facts{display:flex;flex-wrap:wrap;gap:14px;font-size:13px;color:var(--muted)}
.stock{color:#3d7b20}
.detail-price{margin:32px 0}
.detail-price strong{display:block;font-size:34px;color:var(--navy)}
.detail-price small{color:var(--muted)}
.add-box{display:flex;gap:12px;background:#f0f2f3;padding:16px;border-radius:13px}
.add-box input{width:90px}
.add-box .btn{flex:1}
.no-buy{font-size:13px;color:var(--muted)}
.pdf-link{display:inline-block;margin-top:15px;color:var(--blue);font-weight:700}
.description{max-width:900px;margin:0 auto 80px;padding:0 24px;line-height:1.75}
.install-body{min-height:100vh;background:linear-gradient(135deg,var(--navy),#152a3b);display:grid;place-items:center;padding:25px}
.install-card{width:min(540px,100%);background:#fff;border-radius:22px;padding:36px;box-shadow:var(--shadow)}
.install-card h1{font-size:30px;margin:9px 0}
.steps{display:flex;gap:8px;margin:20px 0}
.steps i{height:5px;flex:1;background:#e5e8ea;border-radius:5px}
.steps i.on{background:var(--yellow)}
.muted{color:var(--muted);font-size:12px}
.alert{padding:12px;border-radius:8px;margin:12px 0}
.empty-state{text-align:center;padding:60px;background:#f4f5f6;border-radius:15px}
@media(max-width:900px){.site-head nav>a{display:none}
.hero,.product-detail{grid-template-columns:1fr;gap:30px}
.product-grid{grid-template-columns:repeat(2,1fr)}
.how>div{grid-template-columns:1fr}
.section-head{align-items:stretch;flex-direction:column}
.search{min-width:0}
.detail-image{min-height:330px}
.detail-copy h1{font-size:34px}
}
@media(max-width:540px){.site-head{padding:0 14px}
.logo{font-size:0}
.cart-button span{display:none}
.hero{padding-top:45px}
.hero h1{font-size:42px}
.product-grid{grid-template-columns:1fr}
.two{grid-template-columns:1fr}
.site-footer{flex-direction:column;gap:28px}
.add-box{flex-direction:column}
.product-image{height:280px}
}

/* Mobile-first responsive layer */
html{min-width:320px}body{overflow-x:hidden}.site-head{height:68px;padding:0 12px}.logo{font-size:0}.logo span,.brand-mark{width:40px;height:40px}.site-head nav{gap:8px}.site-head nav>a{display:none}.cart-button{min-height:44px;padding:10px 12px}.cart-button span{display:none}.hero{padding:42px 16px;grid-template-columns:1fr;gap:28px}.hero:before{top:68px;height:430px}.hero h1{font-size:clamp(34px,11vw,46px)}.hero-copy>p{font-size:17px}.hero-card{padding:24px;border-radius:18px}.catalog-section{padding:48px 16px}.section-head{align-items:stretch;flex-direction:column}.section-head h2,.how h2{font-size:32px}.search{width:100%;min-width:0}.search input{min-width:0}.search button,.btn,.icon-btn,.dialog-close{min-height:44px}.chips{padding:20px 0}.product-grid{grid-template-columns:1fr;gap:16px}.product-image{height:260px}.how{padding:52px 16px}.how>div{grid-template-columns:1fr}.site-footer{padding:42px 16px;flex-direction:column;gap:28px}.cart-items{padding:12px 16px}.cart-drawer>header,.cart-drawer>footer{padding:18px 16px}.inquiry-modal{max-height:calc(100dvh - 20px);overflow:auto;padding:22px 18px;border-radius:16px}.inquiry-modal h2{font-size:27px}.two{grid-template-columns:1fr}.breadcrumbs{padding:0 16px}.product-detail{padding:15px 16px 50px;grid-template-columns:1fr;gap:28px}.detail-image{min-height:280px}.detail-copy h1{font-size:34px}.add-box{flex-direction:column}.description{padding:0 16px}.install-card{padding:26px 20px}.empty-state{padding:38px 16px}input,textarea,select{max-width:100%;font-size:16px}
@media(min-width:600px){.site-head{padding:0 24px}.logo{font-size:20px}.cart-button span{display:inline}.hero,.catalog-section,.product-detail{padding-left:24px;padding-right:24px}.product-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.two{grid-template-columns:1fr 1fr}.add-box{flex-direction:row}.site-footer{padding-left:24px;padding-right:24px}.inquiry-modal{padding:34px}}
@media(min-width:900px){.site-head{height:78px;padding:0 max(24px,calc((100vw - 1240px)/2))}.site-head nav{gap:25px}.site-head nav>a{display:block}.hero{padding-top:72px;padding-bottom:56px;grid-template-columns:1.45fr .75fr;gap:70px}.hero:before{top:78px;height:470px}.hero h1{font-size:clamp(42px,5.5vw,72px)}.hero-copy>p{font-size:20px}.hero-card{padding:32px;border-radius:24px}.section-head{align-items:end;flex-direction:row}.section-head h2,.how h2{font-size:40px}.search{width:auto;min-width:370px}.how>div{grid-template-columns:repeat(3,1fr)}.site-footer{flex-direction:row}.product-detail{grid-template-columns:1fr 1fr;gap:70px}.detail-image{min-height:520px}.detail-copy h1{font-size:44px}}
@media(min-width:1180px){.product-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important}}