:root {
    --navy: #061d39;
    --navy-light: #0a315b;
    --blue: #0d5aa1;
    --sky: #eaf2f9;
    --line: #cbd5df;
    --text: #17263a;
    --muted: #697688;
    --white: #fff;
    --container: 1320px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--text); background: #fff; font-family: "Noto Sans KR", Arial, sans-serif; line-height: 1.55; word-break: keep-all; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
.container { width: min(calc(100% - 40px), var(--container)); margin: 0 auto; }
.skip-link { position: fixed; top: -70px; left: 20px; z-index: 3000; padding: 12px 18px; color: #fff; background: #000; }
.skip-link:focus { top: 12px; }

.catalog-header { position: sticky; top: 0; z-index: 1000; height: 76px; color: #fff; background: rgba(4, 25, 49, .98); border-bottom: 1px solid rgba(255,255,255,.13); }
.header-row { display: flex; align-items: center; width: min(calc(100% - 40px), 1420px); height: 100%; margin: 0 auto; gap: 34px; }
.wordmark { display: flex; flex-direction: column; min-width: 220px; line-height: 1; }
.wordmark strong { font-size: 26px; font-weight: 900; letter-spacing: -.8px; }
.wordmark small { margin-top: 5px; font-size: 8px; font-weight: 700; letter-spacing: .5px; }
.catalog-nav { display: flex; align-items: center; justify-content: center; flex: 1; height: 100%; gap: clamp(18px, 2vw, 34px); }
.catalog-nav a { position: relative; display: flex; align-items: center; height: 100%; font-size: 14px; font-weight: 700; white-space: nowrap; }
.catalog-nav a::after { position: absolute; right: 0; bottom: 10px; left: 0; height: 2px; content: ""; background: #fff; transform: scaleX(0); }
.catalog-nav a:hover::after, .catalog-nav a.is-active::after { transform: scaleX(1); }
.estimate-link { padding: 10px 17px; border: 1px solid rgba(255,255,255,.65); font-size: 13px; font-weight: 800; white-space: nowrap; }
.estimate-link:hover { color: var(--navy); background: #fff; }
.nav-toggle { display: none; width: 42px; height: 42px; margin-left: auto; padding: 9px; border: 0; background: transparent; }
.nav-toggle span { display: block; height: 2px; margin: 5px 0; background: #fff; }

.home-hero { position: relative; height: 500px; overflow: hidden; color: #fff; background: var(--navy); }
.home-hero > img, .page-hero > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.home-hero > img { object-position: center 42%; }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(2,14,29,.94), rgba(3,20,39,.7) 47%, rgba(3,20,39,.12) 82%); }
.hero-copy { position: relative; z-index: 1; display: flex; flex-direction: column; justify-content: center; height: 100%; }
.hero-copy .kicker { margin: 0 0 12px; color: #91bee8; font-size: 12px; font-weight: 900; letter-spacing: 2.8px; }
.hero-copy h1 { max-width: 760px; margin: 0; font-size: clamp(42px, 5vw, 64px); line-height: 1.22; letter-spacing: -3.5px; }
.hero-copy > p:not(.kicker) { margin: 20px 0 0; color: rgba(255,255,255,.83); font-size: 17px; line-height: 1.8; }
.hero-buttons { display: flex; gap: 10px; margin-top: 28px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 27px; border: 1px solid transparent; font-weight: 800; transition: .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-blue { color: #fff; background: var(--blue); }
.button-blue:hover { background: #1170c2; }
.button-outline { color: #fff; border-color: rgba(255,255,255,.8); background: rgba(255,255,255,.03); }
.button-outline:hover { color: var(--navy); background: #fff; }

.benefit-bar { color: #fff; background: var(--navy); }
.benefit-row { display: grid; grid-template-columns: repeat(4, 1fr); }
.benefit-row article { display: flex; align-items: center; min-height: 112px; padding: 20px 26px; border-right: 1px solid rgba(255,255,255,.15); gap: 15px; }
.benefit-row article:first-child { border-left: 1px solid rgba(255,255,255,.15); }
.benefit-icon { display: grid; width: 44px; height: 44px; place-items: center; flex: 0 0 auto; color: #9bc9f2; border: 1px solid rgba(155,201,242,.42); border-radius: 50%; font-size: 20px; }
.benefit-row h3 { margin: 0; font-size: 15px; }
.benefit-row p { margin: 3px 0 0; color: rgba(255,255,255,.62); font-size: 11px; }

.home-section { padding: 68px 0; }
.home-section.soft { background: #f5f7fa; }
.section-title { display: flex; align-items: end; justify-content: space-between; margin-bottom: 27px; gap: 30px; }
.section-title span { color: var(--blue); font-size: 11px; font-weight: 900; letter-spacing: 2.2px; }
.section-title h2 { margin: 5px 0 0; color: var(--navy); font-size: 32px; letter-spacing: -1.5px; }
.section-title > p { max-width: 500px; margin: 0; color: var(--muted); font-size: 13px; text-align: right; }

.compare-wrap { display: grid; grid-template-columns: 1fr 54px 1.45fr; align-items: stretch; }
.compare-box { border: 1px solid var(--line); background: #fff; }
.compare-box > h3 { margin: 0; padding: 11px 18px; font-size: 15px; text-align: center; border-bottom: 1px solid var(--line); background: #f2f3f5; }
.compare-box ul { display: grid; grid-template-columns: 1fr 1fr; margin: 0; padding: 23px 25px; list-style: none; gap: 12px; }
.compare-box li { font-size: 13px; }
.compare-box li::before { margin-right: 7px; content: "×"; color: #af5964; font-weight: 900; }
.compare-arrow { display: grid; color: var(--blue); place-items: center; font-size: 38px; font-weight: 900; }
.compare-box.new { color: #fff; border-color: var(--navy); background: var(--navy); }
.compare-box.new > h3 { border-color: rgba(255,255,255,.16); background: #092a50; }
.supply-flow { display: grid; grid-template-columns: repeat(4, 1fr); padding: 20px; gap: 9px; }
.supply-flow div { min-height: 92px; padding: 13px; color: var(--navy); background: #fff; text-align: center; }
.supply-flow img { width: 100%; height: 52px; margin-bottom: 4px; object-fit: contain; }
.supply-flow b { font-size: 12px; }
.flow-note { margin: 0 20px 18px; color: rgba(255,255,255,.7); font-size: 11px; text-align: center; }

.category-cards { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.category-card { overflow: hidden; border: 1px solid var(--line); background: #fff; transition: .22s ease; }
.category-card:hover { transform: translateY(-5px); box-shadow: 0 14px 30px rgba(4,29,57,.12); }
.category-card img { width: 100%; height: 150px; object-fit: contain; padding: 12px; background: #fff; }
.category-card div { padding: 17px 18px; border-top: 1px solid #e5e9ed; }
.category-card h3 { margin: 0; color: var(--navy); font-size: 19px; }
.category-card p { min-height: 40px; margin: 6px 0 10px; color: var(--muted); font-size: 11px; }
.category-card b { color: var(--blue); font-size: 12px; }

.popular-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; }
.mini-product { overflow: hidden; border: 1px solid var(--line); background: #fff; }
.mini-product img { width: 100%; aspect-ratio: 1 / .82; object-fit: contain; padding: 10px; background: #fff; }
.mini-product div { padding: 13px 14px 15px; border-top: 1px solid #e5e9ed; }
.mini-product span { color: var(--blue); font-size: 9px; font-weight: 900; }
.mini-product h3 { margin: 3px 0 5px; color: var(--navy); font-size: 14px; }
.mini-product p { margin: 0; color: var(--muted); font-size: 10px; }

.page-hero { position: relative; height: 320px; overflow: hidden; color: #fff; background: var(--navy); }
.page-hero > img { filter: grayscale(.25) contrast(1.05); }
.page-hero .hero-overlay { background: linear-gradient(90deg, rgba(3,15,29,.94), rgba(3,22,42,.62) 55%, rgba(3,22,42,.17)); }
.page-hero .hero-copy h1 { font-size: 54px; }
.page-hero .hero-copy > p:not(.kicker) { margin-top: 13px; font-size: 15px; }

.catalog-main { padding: 45px 0 60px; background: #f7f8fa; }
.catalog-layout { display: grid; grid-template-columns: 230px minmax(0, 1fr); align-items: start; gap: 34px; }
.side-panel { position: sticky; top: 100px; border: 1px solid var(--line); background: #fff; }
.side-panel > h2 { margin: 0; padding: 17px 19px; color: #fff; background: var(--navy); font-size: 18px; }
.side-menu { margin: 0; padding: 0; list-style: none; }
.side-menu a { display: flex; align-items: center; justify-content: space-between; min-height: 51px; padding: 0 18px; border-bottom: 1px solid #e3e7eb; font-size: 13px; font-weight: 700; }
.side-menu a:hover, .side-menu a.is-active { color: #fff; background: var(--navy-light); }
.side-benefits { padding: 17px 18px; }
.side-benefits div { padding: 13px 0; border-bottom: 1px solid #e6eaee; }
.side-benefits div:last-child { border-bottom: 0; }
.side-benefits b { display: block; color: var(--navy); font-size: 12px; }
.side-benefits span { color: var(--muted); font-size: 10px; }
.catalog-content { min-width: 0; }
.content-head { display: flex; align-items: end; justify-content: space-between; margin-bottom: 18px; gap: 24px; }
.content-head, .subsection { scroll-margin-top: 96px; }
.content-head h2 { margin: 0; color: var(--navy); font-size: 28px; letter-spacing: -1.2px; }
.content-head p { margin: 0; color: var(--muted); font-size: 12px; }
.product-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 13px; }
.product-card { overflow: hidden; border: 1px solid var(--line); background: #fff; transition: .2s ease; }
.product-card:hover { transform: translateY(-4px); box-shadow: 0 12px 25px rgba(4,29,57,.1); }
.product-card img { width: 100%; aspect-ratio: 1 / .88; object-fit: contain; padding: 13px; background: #fff; }
.product-card div { min-height: 104px; padding: 13px 14px 15px; border-top: 1px solid #e4e8ec; }
.product-card span { color: var(--blue); font-size: 9px; font-weight: 900; }
.product-card h3 { margin: 3px 0 5px; color: var(--navy); font-size: 15px; line-height: 1.35; }
.product-card p { margin: 0; color: var(--muted); font-size: 10px; line-height: 1.55; }
.subsection { margin-top: 38px; }
.subsection-title { display: flex; align-items: center; justify-content: space-between; margin-bottom: 15px; padding-bottom: 11px; border-bottom: 2px solid var(--navy); }
.subsection-title h2 { margin: 0; color: var(--navy); font-size: 21px; }
.subsection-title a { color: var(--blue); font-size: 11px; font-weight: 800; }
.quote-panel { display: grid; grid-template-columns: 1fr auto; align-items: center; margin-top: 32px; padding: 24px 28px; color: #fff; background: var(--navy); gap: 30px; }
.quote-panel h2 { margin: 0; font-size: 21px; }
.quote-panel p { margin: 4px 0 0; color: rgba(255,255,255,.67); font-size: 11px; }

.contact-bar { color: #fff; background: linear-gradient(90deg, #061d39, #0b3159); }
.contact-row { display: grid; grid-template-columns: 1.2fr .8fr .8fr 1.1fr; align-items: center; min-height: 122px; gap: 28px; }
.contact-row > div { padding-right: 26px; border-right: 1px solid rgba(255,255,255,.22); }
.contact-row > div:nth-child(3) { border-right: 0; }
.contact-row h2 { margin: 0; font-size: 18px; }
.contact-row p { margin: 3px 0 0; color: rgba(255,255,255,.65); font-size: 11px; }
.contact-row b { display: block; font-size: 14px; }
.contact-actions { display: flex; gap: 8px; }
.contact-actions .button { min-height: 44px; flex: 1; padding: 0 15px; font-size: 12px; }
.catalog-footer { padding: 34px 0; color: rgba(255,255,255,.65); background: #04152a; }
.footer-row { display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.footer-wordmark strong { display: block; color: #fff; font-size: 22px; }
.footer-wordmark small { font-size: 8px; }
.footer-row p { margin: 2px 0; font-size: 10px; }
.footer-row a { text-decoration: underline; }
.floating-phone { position: fixed; right: 20px; bottom: 20px; z-index: 900; display: flex; align-items: center; min-height: 48px; padding: 0 18px; color: #fff; border-radius: 26px; background: var(--blue); box-shadow: 0 8px 24px rgba(3,26,50,.28); gap: 8px; font-size: 12px; font-weight: 800; }

@media (max-width: 1100px) {
    .catalog-nav { gap: 15px; }
    .catalog-nav a { font-size: 12px; }
    .estimate-link { display: none; }
    .product-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .popular-grid { grid-template-columns: repeat(3, 1fr); }
    .category-cards { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 820px) {
    .catalog-header { height: 68px; }
    .header-row { width: min(calc(100% - 28px), 1420px); }
    .wordmark { min-width: 0; }
    .wordmark strong { font-size: 22px; }
    .nav-toggle { display: block; }
    .catalog-nav { position: absolute; top: 68px; right: 0; left: 0; display: none; flex-direction: column; align-items: stretch; height: auto; padding: 10px 22px 22px; background: var(--navy); gap: 0; }
    .catalog-nav.is-open { display: flex; }
    .catalog-nav a { height: auto; padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,.12); }
    .catalog-nav a::after { display: none; }
    .home-hero { height: 510px; }
    .hero-copy h1 { font-size: 44px; }
    .benefit-row { grid-template-columns: 1fr 1fr; }
    .benefit-row article:nth-child(odd) { border-left: 1px solid rgba(255,255,255,.15); }
    .compare-wrap { grid-template-columns: 1fr; }
    .compare-arrow { height: 54px; transform: rotate(90deg); }
    .catalog-layout { grid-template-columns: 1fr; }
    .side-panel { position: static; }
    .side-benefits { display: none; }
    .side-menu { display: grid; grid-template-columns: repeat(3, 1fr); }
    .side-menu a { border-right: 1px solid #e3e7eb; }
    .product-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .contact-row { grid-template-columns: 1fr 1fr; padding: 25px 0; }
    .contact-row > div { border-right: 0; }
    .contact-actions { grid-column: 1 / -1; }
}

@media (max-width: 560px) {
    body { overflow-x: hidden; }
    .container { width: min(calc(100% - 26px), var(--container)); }
    .home-hero { height: 520px; }
    .home-hero > img { object-position: 61% center; }
    .hero-copy { min-width: 0; }
    .hero-copy h1 { max-width: 100%; font-size: 32px; letter-spacing: -1.8px; word-break: normal; overflow-wrap: anywhere; }
    .hero-copy > p:not(.kicker) { font-size: 14px; }
    .hero-buttons { flex-direction: column; }
    .benefit-row { grid-template-columns: 1fr; }
    .benefit-row article { min-height: 92px; border-left: 1px solid rgba(255,255,255,.15); }
    .home-section { padding: 52px 0; }
    .section-title { align-items: flex-start; flex-direction: column; gap: 8px; }
    .section-title h2 { max-width: 100%; font-size: 25px; word-break: normal; overflow-wrap: anywhere; }
    .section-title > p { text-align: left; }
    .compare-box ul { grid-template-columns: 1fr; }
    .supply-flow { grid-template-columns: 1fr 1fr; }
    .category-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
    .category-card { min-width: 0; }
    .category-card img { height: 120px; }
    .category-card h3 { font-size: 15px; overflow-wrap: anywhere; }
    .category-card p { min-height: 54px; font-size: 10px; overflow-wrap: anywhere; }
    .popular-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px; }
    .mini-product { min-width: 0; }
    .page-hero { height: 280px; }
    .page-hero .hero-copy h1 { font-size: 40px; }
    .catalog-main { padding-top: 25px; }
    .catalog-layout { gap: 25px; }
    .side-menu { grid-template-columns: 1fr 1fr; }
    .content-head { align-items: flex-start; flex-direction: column; gap: 6px; }
    .product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px; }
    .product-card img { padding: 8px; }
    .product-card div { min-height: 105px; padding: 11px 10px; }
    .product-card h3 { font-size: 14px; overflow-wrap: anywhere; }
    .quote-panel { grid-template-columns: 1fr; }
    .contact-row { grid-template-columns: 1fr; gap: 18px; }
    .contact-actions { grid-column: auto; }
    .footer-row { align-items: flex-start; flex-direction: column; }
    .floating-phone { width: 48px; padding: 0; justify-content: center; }
    .floating-phone span:last-child { display: none; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { transition-duration: .01ms !important; }
}

/* Main page premium catalog renewal: the original layout remains in the document for traceability, while the renewed main experience is displayed. */
.premium-home ~ .home-hero,
.premium-home ~ .benefit-bar,
.premium-home ~ .home-section { display: none; }
.premium-home { color: #14243a; background: #fff; }
.premium-hero { position: relative; height: 610px; overflow: hidden; color: #fff; background: #071b32; }
.premium-hero > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center 47%; filter: saturate(.72) contrast(1.07); }
.premium-hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(2,15,30,.97) 0%, rgba(3,20,39,.9) 31%, rgba(4,24,45,.47) 62%, rgba(4,24,45,.12) 100%); }
.premium-hero::after { position: absolute; inset: auto 0 0; height: 1px; content: ""; background: rgba(255,255,255,.28); }
.premium-hero-inner { position: relative; z-index: 1; display: flex; flex-direction: column; justify-content: center; height: 100%; padding-top: 8px; }
.premium-eyebrow { margin: 0 0 18px; color: #7eb7e7; font-size: 12px; font-weight: 800; letter-spacing: 3.2px; }
.premium-hero h1 { max-width: 740px; margin: 0; font-size: clamp(48px, 5vw, 70px); font-weight: 500; line-height: 1.18; letter-spacing: -4.5px; }
.premium-hero h1 strong { font-weight: 900; }
.premium-hero-desc { margin: 23px 0 0; color: rgba(255,255,255,.77); font-size: 17px; line-height: 1.85; }
.premium-hero-actions { display: flex; margin-top: 31px; gap: 10px; }
.premium-primary, .premium-secondary { display: inline-flex; align-items: center; justify-content: space-between; min-width: 190px; height: 54px; padding: 0 22px; font-size: 14px; font-weight: 800; }
.premium-primary { color: #fff; background: #0e5da5; }
.premium-primary:hover { background: #1474c7; }
.premium-primary span { margin-left: 24px; font-size: 18px; }
.premium-secondary { justify-content: center; color: #fff; border: 1px solid rgba(255,255,255,.65); background: rgba(2,17,34,.15); }
.premium-secondary:hover { color: #071d39; background: #fff; }
.premium-hero-meta { position: absolute; bottom: 25px; left: 20px; display: flex; gap: 34px; }
.premium-hero-meta span { color: rgba(255,255,255,.64); font-size: 11px; font-weight: 600; }
.premium-hero-meta b { margin-right: 8px; color: #70b0e6; font-size: 10px; }
.premium-service-bar { color: #fff; background: #071f3d; }
.premium-service-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.premium-service-grid article { display: flex; align-items: center; min-height: 112px; padding: 20px 28px; border-right: 1px solid rgba(255,255,255,.13); gap: 17px; }
.premium-service-grid article:first-child { border-left: 1px solid rgba(255,255,255,.13); }
.service-number { color: #65a8df; font-size: 12px; font-weight: 800; letter-spacing: 1px; }
.premium-service-grid b { display: block; font-size: 15px; }
.premium-service-grid p { margin: 4px 0 0; color: rgba(255,255,255,.55); font-size: 11px; }
.premium-section { padding: 82px 0; }
.premium-products-section, .premium-assortment-section, .premium-supply-section { display: none; }
.premium-company-section { position: relative; overflow: hidden; color: #fff; background: #071d38; }
.premium-company-section::before { position: absolute; inset: 0; content: ""; background: linear-gradient(90deg, rgba(7,29,56,.96), rgba(7,29,56,.83) 53%, rgba(7,29,56,.98)), url("../assets/images/metal-framing.jpg") center / cover no-repeat; opacity: .95; }
.premium-company-section::after { position: absolute; right: -140px; bottom: -180px; width: 520px; height: 520px; content: ""; border-radius: 999px; background: radial-gradient(circle, rgba(63,143,211,.2), rgba(63,143,211,0) 68%); }
.premium-company-layout { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.15fr) 430px; align-items: center; gap: 70px; }
.premium-company-copy > span { color: #87c6f4; font-size: 11px; font-weight: 900; letter-spacing: 2.7px; }
.premium-company-copy h2 { margin: 12px 0 18px; color: #fff; font-size: 38px; line-height: 1.34; letter-spacing: -2.4px; }
.premium-company-copy p { max-width: 720px; margin: 0; color: rgba(255,255,255,.68); font-size: 15px; line-height: 1.9; }
.premium-company-actions { display: flex; align-items: center; margin-top: 30px; gap: 22px; }
.premium-company-actions .premium-text-link { color: #b6dcfb; border-color: rgba(182,220,251,.55); }
.premium-company-card { padding: 31px 32px; border: 1px solid rgba(255,255,255,.18); background: rgba(3,17,34,.58); box-shadow: 0 30px 70px rgba(0,0,0,.24); backdrop-filter: blur(12px); }
.premium-company-card strong { display: block; margin-bottom: 20px; color: #fff; font-size: 14px; font-weight: 900; letter-spacing: 1.4px; }
.premium-company-card ul { display: grid; margin: 0; padding: 0; list-style: none; gap: 16px; }
.premium-company-card li { display: grid; grid-template-columns: 82px minmax(0, 1fr); align-items: start; padding-top: 16px; border-top: 1px solid rgba(255,255,255,.14); gap: 16px; }
.premium-company-card li:first-child { padding-top: 0; border-top: 0; }
.premium-company-card b { color: #8bc8f6; font-size: 13px; }
.premium-company-card span { color: rgba(255,255,255,.64); font-size: 12px; line-height: 1.65; }
.premium-process-section { background: #fff; }
.premium-process-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid #d4dce5; border-left: 1px solid #d4dce5; }
.premium-process-grid article { min-height: 235px; padding: 28px 25px; border-right: 1px solid #d4dce5; border-bottom: 1px solid #d4dce5; background: linear-gradient(180deg, #fff, #f7fafc); }
.premium-process-grid article span { display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 28px; margin-bottom: 26px; color: #fff; background: #0d5ca6; font-size: 11px; font-weight: 900; }
.premium-process-grid h3 { margin: 0 0 10px; color: #071f3d; font-size: 21px; letter-spacing: -1px; }
.premium-process-grid p { margin: 0; color: #6e7e92; font-size: 13px; line-height: 1.72; }
.premium-category-section { position: relative; overflow: hidden; background: #eef3f8; }
.premium-category-section::before { position: absolute; inset: 0; content: ""; background: linear-gradient(90deg, rgba(238,243,248,.96), rgba(238,243,248,.76) 48%, rgba(238,243,248,.96)), url("../assets/images/hero-clean-ceiling.jpg") center 30% / cover no-repeat; opacity: .82; }
.premium-category-section::after { position: absolute; top: 0; right: 0; width: 44%; height: 100%; content: ""; background: linear-gradient(135deg, rgba(255,255,255,0), rgba(13,92,166,.08)); opacity: .72; }
.premium-category-section .container { position: relative; z-index: 1; }
.premium-heading { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 32px; gap: 30px; }
.premium-heading span, .premium-supply-intro > span, .premium-quote-inner > div > span { color: #0d5ca6; font-size: 11px; font-weight: 900; letter-spacing: 2.4px; }
.premium-heading h2, .premium-supply-intro h2 { margin: 7px 0 0; color: #071f3d; font-size: 35px; line-height: 1.28; letter-spacing: -2px; }
.premium-heading > p { margin: 0; color: #718095; font-size: 13px; line-height: 1.75; text-align: right; }
.premium-category-board { display: grid; grid-template-columns: 1.3fr repeat(4, 1fr); border-top: 1px solid rgba(7,31,61,.16); border-left: 1px solid rgba(7,31,61,.16); background: rgba(255,255,255,.48); box-shadow: 0 24px 70px rgba(4,24,45,.09); backdrop-filter: blur(10px); }
.premium-category-panel { position: relative; display: flex; min-width: 0; min-height: 360px; flex-direction: column; padding: 24px 22px 22px; overflow: hidden; border-right: 1px solid rgba(7,31,61,.16); border-bottom: 1px solid rgba(7,31,61,.16); background: linear-gradient(180deg, rgba(255,255,255,.96), rgba(247,250,252,.96)); transition: transform .22s ease, box-shadow .22s ease, background .22s ease; }
.premium-category-panel::before { position: absolute; inset: auto 0 0; height: 42%; content: ""; background: linear-gradient(0deg, rgba(7,31,61,.08), rgba(7,31,61,0)); pointer-events: none; }
.premium-category-panel:hover { z-index: 2; transform: translateY(-6px); background: #fff; box-shadow: 0 24px 42px rgba(4,24,45,.17); }
.premium-category-panel.category-steel { min-height: 360px; background: linear-gradient(135deg, rgba(255,255,255,.98) 0%, rgba(245,249,252,.93) 52%, rgba(218,229,239,.92) 100%); }
.panel-head { position: relative; z-index: 2; }
.panel-head span { display: inline-flex; align-items: center; justify-content: center; width: 32px; height: 22px; margin-bottom: 9px; color: #fff; background: #0d5ca6; font-size: 10px; font-weight: 900; }
.panel-head h3 { margin: 0; color: #071f3d; font-size: 25px; line-height: 1.18; letter-spacing: -1.2px; }
.category-steel .panel-head h3 { font-size: 34px; }
.panel-head p { margin: 7px 0 0; color: #6c7b8d; font-size: 11px; }
.panel-image { position: relative; z-index: 1; display: grid; grid-template-columns: 1fr 1fr; align-items: center; min-height: 126px; margin: 16px -4px 15px; gap: 4px; }
.panel-image img { width: 100%; height: 116px; object-fit: contain; filter: drop-shadow(0 14px 16px rgba(4,24,45,.13)); mix-blend-mode: multiply; }
.panel-image-wide { min-height: 150px; margin-top: 22px; }
.panel-image-wide img { height: 150px; }
.premium-category-panel ul { position: relative; z-index: 2; display: grid; grid-template-columns: 1fr; margin: auto 0 16px; padding: 14px 0 0; border-top: 1px solid rgba(7,31,61,.14); list-style: none; gap: 7px; }
.premium-category-panel li { display: flex; align-items: center; color: #263c55; font-size: 12px; font-weight: 700; }
.premium-category-panel li::before { width: 5px; height: 5px; margin-right: 8px; content: ""; background: #0d5ca6; }
.premium-category-panel b { position: relative; z-index: 2; color: #0b5a9c; font-size: 12px; }
.premium-text-link { color: #0d5ca6; border-bottom: 1px solid #8eb5d7; font-size: 12px; font-weight: 800; }
.premium-product-grid { display: grid; gap: 13px; }
.premium-product-grid-eight { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.premium-product-card { min-width: 0; padding: 0 0 19px; border: 1px solid #d3dbe4; background: #fff; transition: transform .2s ease, box-shadow .2s ease; }
.premium-product-card:hover { transform: translateY(-4px); box-shadow: 0 14px 28px rgba(5,30,56,.1); }
.premium-product-card .product-image { display: flex; align-items: center; justify-content: center; height: 205px; margin-bottom: 15px; border-bottom: 1px solid #e2e7ec; background: linear-gradient(145deg, #fff, #f7f9fb); }
.premium-product-card img { width: 86%; height: 86%; object-fit: contain; mix-blend-mode: multiply; }
.premium-product-card > span, .premium-product-card > h3, .premium-product-card > p { display: block; margin-right: 18px; margin-left: 18px; }
.premium-product-card > span { color: #0d5ca6; font-size: 9px; font-weight: 900; }
.premium-product-card h3 { margin-top: 3px; margin-bottom: 4px; color: #0a2440; font-size: 16px; }
.premium-product-card p { margin-top: 0; margin-bottom: 0; color: #758296; font-size: 10px; }
.premium-assortment-section { position: relative; overflow: hidden; background: #fff; }
.premium-assortment-section::before { position: absolute; top: -120px; right: -150px; width: 480px; height: 480px; content: ""; border-radius: 999px; background: radial-gradient(circle, rgba(13,92,166,.12), rgba(13,92,166,0) 68%); pointer-events: none; }
.premium-assortment-section .container { position: relative; z-index: 1; }
.premium-assortment-grid { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); border-top: 1px solid #d4dce5; border-left: 1px solid #d4dce5; background: #fff; box-shadow: 0 24px 70px rgba(4,24,45,.07); }
.premium-assortment-grid a { display: flex; min-width: 0; min-height: 210px; flex-direction: column; padding: 14px; border-right: 1px solid #d4dce5; border-bottom: 1px solid #d4dce5; background: linear-gradient(180deg, #fff 0%, #f8fafc 100%); transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.premium-assortment-grid a:hover { z-index: 2; transform: translateY(-4px); background: #fff; box-shadow: 0 18px 32px rgba(4,24,45,.12); }
.premium-assortment-grid img { width: 100%; height: 118px; margin-bottom: 11px; padding: 6px; object-fit: contain; background: #fff; mix-blend-mode: multiply; }
.premium-assortment-grid span { color: #0d5ca6; font-size: 9px; font-weight: 900; letter-spacing: .2px; }
.premium-assortment-grid b { margin-top: 3px; color: #071f3d; font-size: 14px; line-height: 1.25; letter-spacing: -.4px; }
.premium-assortment-grid small { margin-top: 4px; color: #728196; font-size: 10px; line-height: 1.4; }
.premium-supply-section { position: relative; overflow: hidden; color: #fff; background: #071d38; }
.premium-supply-section::before { position: absolute; inset: 0; content: ""; background: linear-gradient(90deg, rgba(7,29,56,.98), rgba(7,29,56,.9) 42%, rgba(7,29,56,.96)), url("../assets/images/metal-framing.jpg") center / cover no-repeat; opacity: .72; }
.premium-supply-section .container { position: relative; z-index: 1; }
.premium-supply-layout { display: grid; grid-template-columns: 330px minmax(0, 1fr); align-items: start; gap: 58px; }
.premium-supply-intro { position: sticky; top: 112px; padding-top: 5px; }
.premium-supply-intro > span { color: #76b5e9; }
.premium-supply-intro h2 { color: #fff; font-size: 34px; }
.premium-supply-intro p { margin: 18px 0 28px; color: rgba(255,255,255,.6); font-size: 13px; line-height: 1.8; }
.premium-supply-intro .premium-primary { width: 200px; }
.premium-supply-products { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid rgba(255,255,255,.16); border-left: 1px solid rgba(255,255,255,.16); }
.premium-supply-products a { display: grid; min-width: 0; min-height: 230px; padding: 18px; border-right: 1px solid rgba(255,255,255,.16); border-bottom: 1px solid rgba(255,255,255,.16); background: rgba(255,255,255,.025); }
.premium-supply-products a:hover { background: rgba(255,255,255,.08); }
.premium-supply-products img { width: 100%; height: 125px; padding: 8px; object-fit: contain; background: #fff; }
.premium-supply-products div { align-self: end; }
.premium-supply-products span { display: block; color: #6eafe4; font-size: 9px; font-weight: 900; }
.premium-supply-products b { display: block; margin: 2px 0; font-size: 14px; }
.premium-supply-products small { color: rgba(255,255,255,.47); font-size: 9px; }
.premium-quote-section { padding: 50px 0; color: #fff; background: #0c355f; }
.premium-quote-inner { display: grid; grid-template-columns: minmax(0, 1.5fr) .65fr auto; align-items: center; gap: 45px; }
.premium-quote-inner > div > span { color: #8cc4ef; }
.premium-quote-inner h2 { margin: 6px 0 5px; font-size: 28px; letter-spacing: -1.4px; }
.premium-quote-inner > div > p { margin: 0; color: rgba(255,255,255,.6); font-size: 12px; }
.premium-quote-contact { padding-left: 30px; border-left: 1px solid rgba(255,255,255,.22); }
.premium-quote-contact small { display: block; color: rgba(255,255,255,.54); font-size: 10px; }
.premium-quote-contact a { display: block; margin: 2px 0; font-size: 21px; font-weight: 800; }
.premium-quote-contact p { margin: 0; color: rgba(255,255,255,.54); font-size: 10px; }
.premium-quote-button { display: flex; align-items: center; justify-content: space-between; width: 195px; height: 58px; padding: 0 20px; border: 1px solid rgba(255,255,255,.7); font-size: 13px; font-weight: 800; }
.premium-quote-button:hover { color: #0c355f; background: #fff; }

@media (max-width: 1100px) {
    .premium-category-grid { grid-template-columns: repeat(2, 1fr); grid-template-rows: 300px repeat(2, 230px); }
    .premium-category-main { grid-column: span 2; grid-row: auto; }
    .premium-category-main img { width: 55%; height: 230px; }
    .premium-category-board { grid-template-columns: repeat(2, 1fr); }
    .premium-category-panel.category-steel { grid-column: 1 / -1; }
    .premium-product-grid-eight { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .premium-assortment-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .premium-company-layout { grid-template-columns: 1fr; gap: 34px; }
    .premium-process-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .premium-supply-layout { grid-template-columns: 260px minmax(0, 1fr); gap: 35px; }
    .premium-quote-inner { grid-template-columns: 1fr auto; }
    .premium-quote-contact { display: none; }
}

@media (max-width: 820px) {
    .premium-hero { height: 570px; }
    .premium-hero h1 { font-size: 48px; }
    .premium-service-grid { grid-template-columns: 1fr 1fr; }
    .premium-service-grid article:nth-child(odd) { border-left: 1px solid rgba(255,255,255,.13); }
    .premium-product-grid-eight { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .premium-assortment-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .premium-company-copy h2 { font-size: 32px; }
    .premium-process-grid { grid-template-columns: 1fr; }
    .premium-supply-layout { grid-template-columns: 1fr; }
    .premium-supply-intro { position: static; }
}

@media (max-width: 560px) {
    .premium-hero { height: 620px; }
    .premium-hero > img { object-position: 54% center; }
    .premium-hero h1 { font-size: 38px; letter-spacing: -2.5px; }
    .premium-hero-desc br { display: block; }
    .premium-hero-actions { flex-direction: column; }
    .premium-primary, .premium-secondary { width: 100%; }
    .premium-hero-meta { right: 13px; bottom: 19px; left: 13px; justify-content: space-between; gap: 7px; }
    .premium-hero-meta span { font-size: 9px; }
    .premium-hero-meta b { display: none; }
    .premium-service-grid { grid-template-columns: 1fr; }
    .premium-service-grid article { min-height: 86px; border-left: 1px solid rgba(255,255,255,.13); }
    .premium-section { padding: 58px 0; }
    .premium-heading { align-items: flex-start; flex-direction: column; gap: 8px; }
    .premium-heading h2 { font-size: 29px; }
    .premium-heading > p { text-align: left; }
    .premium-company-copy h2 { font-size: 28px; letter-spacing: -1.5px; }
    .premium-company-copy p { font-size: 13px; }
    .premium-company-actions { align-items: stretch; flex-direction: column; gap: 14px; }
    .premium-company-card { padding: 24px 21px; }
    .premium-company-card li { grid-template-columns: 1fr; gap: 5px; }
    .premium-process-grid article { min-height: 180px; padding: 22px 20px; }
    .premium-category-grid { grid-template-columns: 1fr; grid-template-rows: 300px repeat(4, 210px); }
    .premium-category-main { grid-column: auto; }
    .premium-category-main .category-copy { top: 28px; left: 25px; }
    .premium-category-main img { width: 70%; height: 190px; }
    .premium-category-card b { top: 128px; }
    .premium-category-main b { top: 105px; }
    .premium-category-board { grid-template-columns: 1fr; }
    .premium-category-panel { min-height: 315px; padding: 22px 20px; }
    .premium-category-panel.category-steel { grid-column: auto; min-height: 340px; }
    .category-steel .panel-head h3 { font-size: 30px; }
    .panel-image-wide img { height: 130px; }
    .premium-product-card .product-image { height: 155px; }
    .premium-assortment-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .premium-assortment-grid a { min-height: 178px; padding: 12px; }
    .premium-assortment-grid img { height: 92px; }
    .premium-supply-products { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .premium-supply-products a { min-height: 205px; padding: 12px; }
    .premium-supply-products img { height: 112px; }
    .premium-quote-inner { grid-template-columns: 1fr; gap: 25px; }
    .premium-quote-inner h2 { font-size: 24px; }
    .premium-quote-button { width: 100%; }
}

/* Compact web-catalog density: reduce presentation-like whitespace and show more products within each viewport. */
@media (min-width: 821px) {
    .catalog-header { height: 68px; }
    .wordmark strong { font-size: 24px; }
    .premium-hero { height: 455px; }
    .premium-hero-inner { padding-top: 0; }
    .premium-eyebrow { margin-bottom: 11px; font-size: 10px; }
    .premium-hero h1 { max-width: 650px; font-size: 54px; line-height: 1.13; letter-spacing: -3.4px; }
    .premium-hero-desc { margin-top: 14px; font-size: 14px; line-height: 1.7; }
    .premium-hero-actions { margin-top: 20px; }
    .premium-primary, .premium-secondary { min-width: 166px; height: 46px; padding: 0 18px; font-size: 12px; }
    .premium-hero-meta { bottom: 16px; }
    .premium-service-grid article { min-height: 82px; padding: 14px 24px; }
    .premium-service-grid b { font-size: 13px; }
    .premium-section { padding: 48px 0; }
    .premium-company-section { padding: 56px 0; }
    .premium-company-copy h2 { font-size: 30px; }
    .premium-company-copy p { font-size: 13px; }
    .premium-company-card { padding: 25px 26px; }
    .premium-process-grid article { min-height: 180px; padding: 22px; }
    .premium-process-grid article span { margin-bottom: 16px; }
    .premium-process-grid h3 { font-size: 18px; }
    .premium-process-grid p { font-size: 11px; }
    .premium-heading { margin-bottom: 20px; }
    .premium-heading h2, .premium-supply-intro h2 { margin-top: 3px; font-size: 28px; letter-spacing: -1.5px; }
    .premium-heading > p { font-size: 11px; line-height: 1.6; }
    .premium-category-grid { grid-template-rows: repeat(2, 190px); gap: 10px; }
    .premium-category-card .category-copy { top: 18px; right: 19px; left: 19px; }
    .premium-category-card h3 { margin: 2px 0; font-size: 20px; }
    .premium-category-card p { font-size: 10px; }
    .premium-category-card b { top: 112px; font-size: 10px; }
    .premium-category-card img { right: 7px; bottom: 5px; height: 103px; }
    .premium-category-main .category-copy { top: 27px; left: 28px; }
    .premium-category-main h3 { margin-top: 4px; font-size: 29px; }
    .premium-category-main p { font-size: 11px; }
    .premium-category-main b { top: 91px; }
    .premium-category-main img { right: 11px; bottom: 10px; width: 73%; height: 245px; }
    .premium-category-board { grid-template-columns: 1.35fr repeat(4, 1fr); }
    .premium-category-panel { min-height: 315px; padding: 20px 18px 18px; }
    .premium-category-panel.category-steel { min-height: 315px; }
    .panel-head h3 { font-size: 22px; }
    .category-steel .panel-head h3 { font-size: 30px; }
    .panel-image { min-height: 104px; margin: 13px -4px 12px; }
    .panel-image img { height: 98px; }
    .panel-image-wide { min-height: 125px; margin-top: 16px; }
    .panel-image-wide img { height: 122px; }
    .premium-category-panel ul { margin-bottom: 12px; padding-top: 12px; gap: 5px; }
    .premium-category-panel li { font-size: 10px; }
    .premium-category-panel b { font-size: 10px; }
    .premium-product-grid-eight { grid-template-columns: repeat(8, minmax(0, 1fr)); gap: 8px; }
    .premium-product-card { padding-bottom: 13px; }
    .premium-product-card .product-image { height: 132px; margin-bottom: 10px; }
    .premium-product-card > span, .premium-product-card > h3, .premium-product-card > p { margin-right: 11px; margin-left: 11px; }
    .premium-product-card h3 { font-size: 13px; }
    .premium-product-card p { font-size: 9px; }
    .premium-assortment-grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
    .premium-assortment-grid a { min-height: 178px; padding: 11px; }
    .premium-assortment-grid img { height: 95px; margin-bottom: 8px; }
    .premium-assortment-grid b { font-size: 12px; }
    .premium-assortment-grid small { font-size: 9px; }
    .premium-supply-section { padding: 45px 0 50px; }
    .premium-supply-layout { display: block; }
    .premium-supply-intro { position: static; display: flex; align-items: center; justify-content: space-between; min-height: 74px; padding: 0 0 18px; gap: 35px; }
    .premium-supply-intro > span { display: none; }
    .premium-supply-intro h2 { flex: 1 1 auto; margin: 0; }
    .premium-supply-intro h2 br { display: none; }
    .premium-supply-intro p { max-width: 455px; margin: 0; font-size: 11px; line-height: 1.7; }
    .premium-supply-intro .premium-primary { width: 174px; }
    .premium-supply-products { grid-template-columns: repeat(5, minmax(0, 1fr)); }
    .premium-supply-products a { min-height: 175px; padding: 10px; }
    .premium-supply-products img { height: 99px; padding: 5px; }
    .premium-quote-section { display: none; }
}

@media (min-width: 821px) and (max-width: 1100px) {
    .premium-product-grid-eight { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .premium-product-card .product-image { height: 150px; }
    .premium-assortment-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .premium-supply-products { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}