@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Syne:wght@600;700;800&display=swap');
:root{--night:#111315;--coal:#1b1f22;--brick:#a64b37;--brick-dark:#733225;--sand:#e8dfd2;--cream:#f7f4ef;--steel:#829095;--lime:#b9d8cb;--white:#fff;--line:rgba(17,19,21,.12);--shadow:0 24px 70px rgba(17,19,21,.12)}
body.interior{font-family:'DM Sans',sans-serif;background:var(--cream);color:var(--night);min-height:100vh;background-image:linear-gradient(rgba(17,19,21,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(17,19,21,.025) 1px,transparent 1px);background-size:34px 34px}
body.interior h1,body.interior h2,body.interior h3,body.interior .nav-links a{font-family:'Syne',sans-serif}
body.interior header{background:rgba(17,19,21,.95);border-bottom:1px solid rgba(255,255,255,.08)}
body.interior .navbar{min-height:88px}.interior .logo img{width:150px}.interior .nav-links{padding-bottom:26px}.interior .nav-links a{font-size:.78rem;letter-spacing:.02em;text-transform:uppercase}
.interior-shell{max-width:1440px;margin:auto;padding:0 34px 110px}.interior-hero{min-height:370px;margin:28px auto 48px;border-radius:28px;overflow:hidden;position:relative;display:grid;grid-template-columns:1.15fr .85fr;background:var(--night);color:#fff;box-shadow:var(--shadow)}
.interior-hero__copy{padding:72px 64px;display:flex;flex-direction:column;justify-content:center;position:relative;z-index:2}.interior-hero__copy:before{content:'';position:absolute;width:180px;height:180px;border:36px solid rgba(185,216,203,.09);border-radius:50%;right:24px;top:22px}.interior-kicker{font-size:.74rem;font-weight:800;text-transform:uppercase;letter-spacing:.18em;color:var(--lime)}.interior-hero h1{font-size:clamp(3rem,6vw,6.5rem);line-height:.9;margin:14px 0 20px;letter-spacing:-.06em}.interior-hero p{font-size:1.04rem;line-height:1.8;color:#ccd3d2;max-width:680px}.interior-hero__visual{position:relative;background:linear-gradient(140deg,var(--brick),var(--brick-dark));isolation:isolate;overflow:hidden}.interior-hero__visual:before{content:'';position:absolute;inset:0;background:repeating-linear-gradient(0deg,transparent 0 42px,rgba(255,255,255,.09) 42px 46px),repeating-linear-gradient(90deg,transparent 0 90px,rgba(255,255,255,.07) 90px 94px);transform:skewY(-8deg) scale(1.15)}.interior-hero__visual:after{content:'BUILD / SELECT / DELIVER';position:absolute;right:-55px;bottom:58px;font:800 1.05rem 'Syne';letter-spacing:.22em;transform:rotate(-90deg);color:rgba(255,255,255,.45)}
.catalog-toolbar{display:flex;justify-content:space-between;align-items:center;gap:20px;margin:0 0 30px}.catalog-toolbar h2{font-size:clamp(2.2rem,4vw,4.4rem);margin:0}.filter-row{display:flex;gap:9px;flex-wrap:wrap}.filter-chip{background:#fff!important;color:var(--night)!important;border:1px solid var(--line)!important;border-radius:999px!important;min-height:44px!important;padding:10px 17px!important;box-shadow:none!important}.filter-chip.active,.filter-chip:hover{background:var(--night)!important;color:#fff!important;transform:none!important}
.catalog-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:22px}.catalog-card{grid-column:span 4;background:#fff;border:1px solid var(--line);border-radius:24px;overflow:hidden;box-shadow:0 12px 34px rgba(17,19,21,.07);transition:transform .45s cubic-bezier(.2,.8,.2,1),box-shadow .45s;position:relative}.catalog-card:nth-child(5n+1){grid-column:span 6}.catalog-card:nth-child(5n+2){grid-column:span 6}.catalog-card:hover{transform:translateY(-10px);box-shadow:0 28px 65px rgba(17,19,21,.15)}.catalog-media{height:280px;background:linear-gradient(145deg,#f2ede6,#ddd3c4);display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}.catalog-media:before{content:'';position:absolute;inset:18px;border:1px dashed rgba(17,19,21,.17);border-radius:16px}.catalog-media img{width:76%;height:76%;object-fit:contain;filter:drop-shadow(0 20px 20px rgba(17,19,21,.18));transition:transform .55s}.catalog-card:hover img{transform:scale(1.08) rotate(-2deg)}.catalog-code{position:absolute;top:18px;left:18px;background:var(--night);color:#fff;border-radius:999px;padding:8px 11px;font-size:.69rem;font-weight:800;letter-spacing:.1em}.catalog-body{padding:24px}.catalog-body h3{font-size:1.55rem;margin:0 0 8px}.catalog-body p{color:#667174;line-height:1.65;margin:0}.catalog-actions{display:grid;grid-template-columns:1fr auto;gap:10px;margin-top:20px}.catalog-actions input{width:72px;border:1px solid var(--line);border-radius:12px;padding:0 12px;background:#f8f6f2}.catalog-actions .button{grid-column:1/-1;background:var(--brick);border-radius:12px}.catalog-link{display:inline-flex;align-items:center;gap:8px;font-weight:800;text-decoration:none;margin-top:14px}.catalog-link:after{content:'↗';transition:.25s}.catalog-link:hover:after{transform:translate(3px,-3px)}
.content-panel{background:#fff;border:1px solid var(--line);border-radius:26px;padding:clamp(28px,5vw,64px);box-shadow:var(--shadow);margin-top:26px}.content-panel h2{font-size:clamp(2.2rem,4vw,4.6rem);margin-top:0}.content-panel p{font-size:1.02rem;line-height:1.9;color:#515b5e}.split-layout{display:grid;grid-template-columns:1fr 1fr;gap:24px}.dark-panel{background:var(--night);color:#fff}.dark-panel p{color:#c7cecd}.metric-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;list-style:none;padding:0}.metric-list li{background:#f1ede7;border-radius:14px;padding:16px;font-weight:700}.dark-panel .metric-list li{background:rgba(255,255,255,.08)}
body.interior form{display:grid;gap:12px}body.interior label{font-weight:800;font-size:.85rem}body.interior input,body.interior select,body.interior textarea{width:100%;border:1px solid rgba(17,19,21,.15);border-radius:14px;padding:15px 16px;background:#fff;font:inherit;outline:none;transition:border .2s,box-shadow .2s}body.interior input:focus,body.interior select:focus,body.interior textarea:focus{border-color:var(--brick);box-shadow:0 0 0 4px rgba(166,75,55,.1)}body.interior button,body.interior .button{background:var(--brick);border-radius:14px}body.interior button:hover,body.interior .button:hover{background:var(--brick-dark)}
.proposal-lab{display:grid;grid-template-columns:330px 1fr;gap:22px}.project-rail{background:var(--night);padding:14px;border-radius:24px;display:grid;gap:9px;align-content:start}.project-rail .project-btn{background:transparent;color:#fff;justify-content:flex-start;gap:12px;border:1px solid rgba(255,255,255,.1);min-height:60px}.project-rail .project-btn.active,.project-rail .project-btn:hover{background:var(--brick);transform:none;box-shadow:none}.project-rail .project-btn span:first-child{font-size:1.2rem}.proposal-stage{background:#fff;border:1px solid var(--line);border-radius:24px;padding:42px;min-height:420px}.proposal-stage .proposal-result{display:grid;grid-template-columns:1fr 1fr;gap:30px;padding:0;background:transparent;box-shadow:none}.recommendation-list a{display:flex;justify-content:space-between;padding:16px 0;border-bottom:1px solid var(--line);font-weight:800;text-decoration:none}.recommendation-list a:hover{color:var(--brick)}
.product-detail{display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:start}.product-detail .product-image,.product-detail>img,.product-detail img{background:#ece5da;border-radius:26px;padding:30px;width:100%;max-height:560px;object-fit:contain}.product-detail h2{font-size:clamp(2.5rem,5vw,5rem);margin:0 0 18px}.product-detail table{width:100%;border-collapse:collapse}.product-detail td,.product-detail th{padding:14px;border-bottom:1px solid var(--line);text-align:left}
body.interior footer{background:var(--night);color:#fff;margin-top:0}body.interior .footer-content{max-width:1440px;margin:auto;padding:48px 34px}body.interior .footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 34px;text-align:center;color:#98a2a4}
.auth-card{max-width:560px;margin:60px auto;background:#fff;border-radius:26px;padding:42px;box-shadow:var(--shadow);border:1px solid var(--line)}.auth-card h2{font-size:2.5rem;margin-top:0}
@media(max-width:1050px){.catalog-card,.catalog-card:nth-child(n){grid-column:span 6}.interior-hero{grid-template-columns:1fr}.interior-hero__visual{min-height:180px}.proposal-lab,.product-detail,.split-layout{grid-template-columns:1fr}.project-rail{grid-template-columns:repeat(2,1fr)}.proposal-stage .proposal-result{grid-template-columns:1fr}}
@media(max-width:700px){.interior-shell{padding:0 16px 70px}.interior-hero{margin-top:16px;border-radius:18px}.interior-hero__copy{padding:48px 24px}.catalog-toolbar{align-items:flex-start;flex-direction:column}.catalog-card,.catalog-card:nth-child(n){grid-column:1/-1}.catalog-media{height:230px}.content-panel{border-radius:18px}.project-rail{grid-template-columns:1fr}.proposal-stage{padding:24px}.metric-list{grid-template-columns:1fr}}
.calculation-result{margin-top:22px;padding:24px;border-radius:20px;background:#eaf5f2;border:1px solid rgba(49,67,71,.12)}
.calculation-result h3{font-size:clamp(2rem,4vw,3.4rem);margin:8px 0 10px}.calculation-result .button{margin-top:8px}

/* ===== V6 unified product system ===== */
.product-page-v6{padding:38px 0 90px}
.product-breadcrumbs{display:flex;gap:9px;align-items:center;color:#6a7375;font-size:.88rem;margin:8px 0 22px}.product-breadcrumbs a{text-decoration:none;font-weight:800}.product-breadcrumbs span{opacity:.55}
.product-showcase{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(380px,.92fr);gap:28px;align-items:stretch}
.product-gallery-v6{position:relative;min-height:580px;border-radius:30px;overflow:hidden;background:linear-gradient(145deg,#ece5dc,#d7cec1);border:1px solid rgba(17,19,21,.1);display:grid;place-items:center;padding:55px;isolation:isolate}
.product-gallery-v6:before{content:'';position:absolute;inset:22px;border:1px dashed rgba(17,19,21,.2);border-radius:20px;z-index:-1}.product-gallery-v6:after{content:'';position:absolute;width:360px;height:360px;border:65px solid rgba(166,75,55,.09);border-radius:50%;right:-150px;bottom:-170px;z-index:-1}
.product-gallery-v6 img{width:88%;height:88%;object-fit:contain;filter:drop-shadow(0 28px 25px rgba(17,19,21,.2));transition:transform .6s cubic-bezier(.2,.8,.2,1)}.product-gallery-v6:hover img{transform:scale(1.045) rotate(-1.5deg)}
.product-code-v6{position:absolute;left:26px;top:26px;background:var(--night);color:#fff;padding:9px 13px;border-radius:999px;font-size:.7rem;font-weight:900;letter-spacing:.12em}
.product-info-v6{background:#fff;border:1px solid var(--line);border-radius:30px;padding:clamp(30px,4vw,54px);box-shadow:var(--shadow);display:flex;flex-direction:column}
.product-info-v6 .interior-kicker{color:var(--brick)}.product-info-v6 h1{font-size:clamp(3rem,5vw,5.8rem);line-height:.9;margin:14px 0 20px}.product-lead-v6{font-size:1.04rem;line-height:1.8;color:#5c6668;margin:0 0 28px}
.product-specs-v6{display:grid;gap:0;margin:4px 0 30px;border-top:1px solid var(--line)}.product-spec-v6{display:grid;grid-template-columns:1fr auto;gap:20px;padding:16px 0;border-bottom:1px solid var(--line)}.product-spec-v6 span{color:#70797b}.product-spec-v6 strong{text-align:right}
.product-order-v6{margin-top:auto;padding:20px;border-radius:20px;background:#f3eee7;border:1px solid rgba(17,19,21,.08)}.product-order-v6 label{display:block;margin-bottom:9px}.product-order-row-v6{display:grid;grid-template-columns:105px 1fr;gap:10px}.product-order-row-v6 input{min-height:54px;text-align:center;font-weight:900}.product-order-row-v6 button{min-height:54px}.product-order-note-v6{display:flex;gap:10px;align-items:flex-start;color:#667174;font-size:.86rem;line-height:1.55;margin:14px 0 0}.product-order-note-v6:before{content:'i';display:grid;place-items:center;flex:0 0 22px;height:22px;border-radius:50%;background:var(--night);color:#fff;font-weight:900}
.product-benefits-v6{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:28px}.product-benefit-v6{background:var(--night);color:#fff;border-radius:20px;padding:25px;min-height:160px}.product-benefit-v6 span{font-size:1.5rem}.product-benefit-v6 h3{margin:24px 0 8px;font-size:1.05rem}.product-benefit-v6 p{margin:0;color:#aeb8b7;font-size:.88rem;line-height:1.55}
.catalog-actions-v6{display:grid;grid-template-columns:92px 1fr;gap:10px;margin-top:20px}.catalog-actions-v6 input{width:100%;text-align:center;font-weight:800}.catalog-actions-v6 .button{min-height:50px}.catalog-card .cart-added-hint{height:18px;color:var(--brick);font-size:.78rem;font-weight:800;margin-top:8px}
@media(max-width:1000px){.product-showcase{grid-template-columns:1fr}.product-gallery-v6{min-height:460px}.product-benefits-v6{grid-template-columns:1fr 1fr}}
@media(max-width:650px){.product-page-v6{padding-top:18px}.product-gallery-v6{min-height:340px;padding:34px;border-radius:20px}.product-info-v6{border-radius:20px}.product-order-row-v6{grid-template-columns:1fr}.product-benefits-v6{grid-template-columns:1fr}}

.product-detail-v7{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(360px,.95fr);gap:48px;align-items:center;background:#fff;border-radius:30px;padding:48px;box-shadow:0 24px 80px rgba(15,25,27,.12)}.product-detail-media{min-height:520px;display:grid;place-items:center;position:relative;background:linear-gradient(145deg,#f3f1ec,#e5ebe8);border-radius:24px;overflow:hidden}.product-detail-media img{width:80%;height:420px;object-fit:contain;filter:drop-shadow(0 24px 24px rgba(0,0,0,.16))}.product-detail-media .catalog-code{position:absolute;top:20px;left:20px}.product-detail-copy h1{font-size:clamp(3rem,6vw,6rem);line-height:.9;margin:12px 0 22px}.product-detail-copy p{font-size:1.05rem;line-height:1.8;color:#5d6967}.spec-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:26px 0}.spec-grid div{padding:18px;border:1px solid #d9e1de;border-radius:16px;display:grid;gap:6px}.spec-grid small{color:#6b7775}.spec-grid strong{font-size:1.05rem}@media(max-width:900px){.product-detail-v7{grid-template-columns:1fr;padding:24px}.product-detail-media{min-height:360px}.product-detail-media img{height:300px}.spec-grid{grid-template-columns:1fr}}