:root {
  --navy: #08243e;
  --navy-2: #103b5d;
  --blue: #087da8;
  --blue-2: #0b9ac3;
  --aqua: #43bfd0;
  --mist: #eaf6f8;
  --ice: #f5fafb;
  --line: #cbdde3;
  --ink: #172a38;
  --muted: #58707e;
  --white: #fff;
  --amber: #e8a63a;
  --success: #16745b;
  --danger: #a33a3a;
  --shadow: 0 16px 45px rgba(8, 36, 62, .11);
  --radius: 10px;
  --container: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--white); font: 16px/1.62 Arial, Helvetica, sans-serif; }
img { max-width: 100%; height: auto; }
a { color: var(--blue); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--navy); }
button, input, textarea, select { font: inherit; }
button, .button { touch-action: manipulation; }
:focus-visible { outline: 3px solid #f4b94f; outline-offset: 3px; }
.skip-link { position: fixed; top: 8px; left: 8px; z-index: 1000; transform: translateY(-150%); padding: .7rem 1rem; background: var(--white); color: var(--navy); border: 2px solid var(--navy); }
.skip-link:focus { transform: translateY(0); }
.container { width: min(calc(100% - 40px), var(--container)); margin-inline: auto; }
.narrow { width: min(calc(100% - 40px), 820px); margin-inline: auto; }
.section { padding: 72px 0; }
.section.compact { padding: 48px 0; }
.section.tint { background: var(--ice); }
.section.navy { color: var(--white); background: var(--navy); }
.section.navy h2, .section.navy h3 { color: var(--white); }
.eyebrow { margin: 0 0 .65rem; color: var(--blue); font-size: .76rem; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
.navy .eyebrow, .hero .eyebrow { color: #79d3e0; }
h1, h2, h3 { margin: 0 0 .75rem; color: var(--navy); line-height: 1.17; letter-spacing: -.02em; }
h1 { font-size: clamp(2.25rem, 5vw, 4.5rem); }
h2 { font-size: clamp(1.75rem, 3.2vw, 2.75rem); }
h3 { font-size: 1.23rem; }
p { margin: 0 0 1rem; }
.lead { color: var(--muted); font-size: clamp(1.06rem, 1.7vw, 1.25rem); }
.navy .lead { color: #d4e5ec; }
.section-heading { display: grid; grid-template-columns: minmax(0, 1fr) minmax(250px, 480px); gap: 42px; align-items: end; margin-bottom: 34px; }
.section-heading p { margin: 0; color: var(--muted); }
.button-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: .72rem 1.05rem; border: 2px solid var(--blue); border-radius: 5px; background: var(--blue); color: var(--white); font-weight: 800; text-align: center; text-decoration: none; transition: transform .15s ease, background .15s ease; }
.button:hover { transform: translateY(-1px); color: var(--white); background: var(--navy-2); border-color: var(--navy-2); }
.button.secondary { background: transparent; color: var(--navy); border-color: var(--navy); }
.button.secondary:hover { color: var(--white); background: var(--navy); }
.navy .button.secondary, .hero .button.secondary { color: var(--white); border-color: #8bcbd7; }
.navy .button.secondary:hover, .hero .button.secondary:hover { background: var(--white); color: var(--navy); border-color: var(--white); }
.text-link { font-weight: 800; }

.utility-bar { color: #d7e7ed; background: #061a2d; font-size: .86rem; }
.utility-inner { display: flex; justify-content: flex-end; gap: 24px; padding: 6px 0; }
.utility-inner a { color: inherit; text-decoration: none; }
.site-header { position: sticky; top: 0; z-index: 50; border-bottom: 1px solid var(--line); background: rgba(255,255,255,.97); backdrop-filter: blur(8px); }
.header-inner { display: flex; align-items: center; min-height: 74px; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; color: var(--navy); font-weight: 900; letter-spacing: .02em; text-decoration: none; }
.brand-mark { display: grid; place-items: center; width: 39px; height: 39px; color: var(--white); background: linear-gradient(145deg, var(--navy), var(--blue)); border-radius: 5px; font-size: .83rem; letter-spacing: -.04em; }
.brand small { display: block; color: var(--muted); font-size: .66rem; font-weight: 700; letter-spacing: .07em; text-transform: uppercase; }
.nav-toggle { display: none; margin-left: auto; padding: .55rem .7rem; border: 1px solid var(--line); border-radius: 5px; background: var(--white); color: var(--navy); font-weight: 800; }
.main-nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.main-nav > a, .nav-group > button { display: inline-flex; align-items: center; min-height: 42px; padding: .45rem .62rem; border: 0; background: transparent; color: var(--navy); font-weight: 750; text-decoration: none; cursor: pointer; }
.nav-group { position: relative; }
.nav-group > button::after { content: ''; width: 7px; height: 7px; margin-left: 7px; border-right: 2px solid; border-bottom: 2px solid; transform: rotate(45deg) translateY(-2px); }
.nav-menu { position: absolute; top: calc(100% + 5px); left: 0; display: none; min-width: 285px; padding: 10px; border: 1px solid var(--line); border-radius: 7px; background: var(--white); box-shadow: var(--shadow); }
.nav-group.open .nav-menu, .nav-group:focus-within .nav-menu { display: grid; }
.nav-menu a { padding: .58rem .65rem; color: var(--ink); font-size: .92rem; text-decoration: none; border-radius: 4px; }
.nav-menu a:hover { background: var(--mist); }
.header-cta { margin-left: 6px; white-space: nowrap; }

.hero { position: relative; overflow: hidden; color: var(--white); background: linear-gradient(115deg, #061d32 0%, #0a3555 64%, #075f79 100%); }
.hero::before, .hero::after { content: ''; position: absolute; border: 1px solid rgba(118,211,224,.22); border-radius: 50%; }
.hero::before { width: 530px; height: 530px; right: -180px; top: -250px; }
.hero::after { width: 360px; height: 360px; right: 80px; bottom: -280px; }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1.25fr .75fr; gap: 60px; align-items: center; min-height: 630px; padding: 72px 0; }
.hero h1 { color: var(--white); max-width: 860px; }
.hero .lead { max-width: 780px; color: #d8e8ee; }
.hero-kicker { margin-bottom: 16px; color: #9fe1e9; font-weight: 800; }
.tech-panel { position: relative; min-height: 430px; padding: 26px; border: 1px solid rgba(151,222,232,.35); background: rgba(5,26,45,.5); box-shadow: 0 28px 70px rgba(0,0,0,.25); }
.tech-panel::before { content: 'CONCEPTUAL PRODUCT VIEW'; display: block; margin-bottom: 26px; color: #8bd5df; font-size: .68rem; font-weight: 800; letter-spacing: .12em; }
.membrane-stack { display: flex; align-items: flex-end; justify-content: center; gap: 13px; min-height: 245px; padding-top: 30px; }
.membrane-sheet { width: 62px; height: 240px; border: 2px solid #bde4e8; border-radius: 5px 5px 12px 12px; background: linear-gradient(90deg, #d9ecee 0%, #fff 50%, #b8d5d9 100%); box-shadow: inset 0 0 0 7px rgba(8,36,62,.15), 0 14px 24px rgba(0,0,0,.2); }
.membrane-sheet:nth-child(2), .membrane-sheet:nth-child(4) { height: 270px; }
.tech-caption { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 26px; }
.tech-caption span { padding-top: 8px; border-top: 1px solid rgba(151,222,232,.35); color: #d8e8ee; font-size: .77rem; }
.breadcrumb { padding: 15px 0; border-bottom: 1px solid var(--line); background: var(--ice); font-size: .88rem; }
.breadcrumb ol { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 0; padding: 0; list-style: none; }
.breadcrumb li:not(:last-child)::after { content: '/'; margin-left: 8px; color: #8ba0aa; }
.breadcrumb a { color: var(--muted); text-decoration: none; }
.page-hero { padding: 62px 0; color: var(--white); background: linear-gradient(120deg, var(--navy), #105777); }
.page-hero h1 { max-width: 920px; color: var(--white); font-size: clamp(2.15rem, 4.4vw, 3.75rem); }
.page-hero .lead { max-width: 850px; color: #d6e9ef; }

.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card { position: relative; padding: 25px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); }
.card.featured { border-top: 5px solid var(--blue); box-shadow: var(--shadow); }
.card .tag { display: inline-block; margin-bottom: 13px; padding: 3px 8px; color: var(--navy); background: var(--mist); border-radius: 3px; font-size: .69rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.icon-number { display: grid; place-items: center; width: 38px; height: 38px; margin-bottom: 17px; border: 1px solid var(--blue); border-radius: 50%; color: var(--blue); font-weight: 900; }
.check-list, .plain-list { margin: 0; padding: 0; list-style: none; }
.check-list li, .plain-list li { position: relative; padding: .42rem 0 .42rem 1.45rem; border-bottom: 1px solid #e7eef1; }
.check-list li::before { content: '✓'; position: absolute; left: 0; color: var(--success); font-weight: 900; }
.plain-list li::before { content: '—'; position: absolute; left: 0; color: var(--blue); }
.stateless-callout { padding: 24px; border-left: 5px solid var(--amber); background: #fff8eb; }
.media-placeholder { display: grid; place-items: center; min-height: 330px; padding: 30px; border: 1px solid #9bbcc7; border-radius: var(--radius); color: #486b78; background: repeating-linear-gradient(135deg, #f2f8f9 0, #f2f8f9 18px, #e7f2f4 18px, #e7f2f4 36px); text-align: center; }
.media-placeholder strong { display: block; color: var(--navy); }
.product-media, .hero-product-media { position: relative; margin: 0; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); box-shadow: var(--shadow); }
.product-media img, .hero-product-media img { display: block; width: 100%; height: 100%; object-fit: cover; }
.product-media figcaption, .hero-product-media figcaption { padding: 11px 14px; color: var(--muted); background: var(--white); font-size: .82rem; line-height: 1.45; }
.product-media.portrait { height: min(610px, 66vw); }
.product-media.portrait img { object-position: center 46%; }
.product-media.wide { grid-column: span 2; }
.product-media.wide img { aspect-ratio: 16 / 9; }
.product-media.installation { max-height: 650px; }
.product-media.installation img { max-height: 590px; object-position: center; }
.product-gallery { display: grid; grid-template-columns: 1.25fr .75fr .75fr; gap: 22px; align-items: stretch; }
.product-gallery .portrait { height: 520px; }
.hero-product-media { align-self: center; border-color: rgba(151,222,232,.38); background: #fff; }
.hero-product-media img { aspect-ratio: 1 / 1; object-fit: contain; }
.hero-product-media figcaption { color: #d8e8ee; background: rgba(5,26,45,.96); }
.media-label { position: absolute; top: 14px; left: 14px; z-index: 2; padding: 6px 9px; border-radius: 3px; color: var(--white); background: rgba(8,36,62,.88); font-size: .68rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 54px; align-items: center; }
.split.wide-left { grid-template-columns: 1.2fr .8fr; }
.process { display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; counter-reset: process; }
.process .step { position: relative; min-height: 170px; padding: 20px 15px; border-top: 4px solid var(--blue); background: var(--white); box-shadow: 0 8px 22px rgba(8,36,62,.08); }
.process .step::before { counter-increment: process; content: '0' counter(process); display: block; margin-bottom: 18px; color: var(--blue); font-size: .75rem; font-weight: 900; letter-spacing: .1em; }
.flow { display: flex; flex-wrap: wrap; align-items: stretch; justify-content: center; gap: 12px; padding: 26px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--ice); }
.flow .flow-item { display: grid; place-items: center; min-width: 150px; min-height: 86px; padding: 14px; border: 1px solid #90b5c2; background: var(--white); color: var(--navy); font-weight: 900; text-align: center; }
.flow .arrow { display: grid; place-items: center; color: var(--blue); font-size: 1.4rem; font-weight: 900; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); }
table { width: 100%; min-width: 680px; border-collapse: collapse; background: var(--white); }
th, td { padding: 13px 15px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { color: var(--white); background: var(--navy-2); font-size: .86rem; letter-spacing: .02em; }
tr:last-child td { border-bottom: 0; }
tbody tr:nth-child(even) { background: var(--ice); }
.required { color: var(--danger); font-weight: 800; }
.faq { border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { padding: 18px 44px 18px 0; color: var(--navy); font-weight: 850; cursor: pointer; }
.faq details p { max-width: 900px; padding: 0 0 18px; color: var(--muted); }
.cta-band { display: grid; grid-template-columns: 1fr auto; gap: 35px; align-items: center; padding: 36px; border-radius: var(--radius); color: var(--white); background: linear-gradient(120deg, var(--navy), #075f79); }
.cta-band h2 { color: var(--white); }
.cta-band p { margin: 0; color: #d8e8ee; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { display: grid; gap: 7px; }
.field.full { grid-column: 1 / -1; }
label { color: var(--navy); font-size: .9rem; font-weight: 800; }
input, textarea, select { width: 100%; padding: .78rem .82rem; border: 1px solid #8faab5; border-radius: 4px; background: var(--white); color: var(--ink); }
textarea { min-height: 150px; resize: vertical; }
.form-note { padding: 12px 14px; border: 1px solid #e6cd94; background: #fff8e9; color: #684c14; font-size: .9rem; }
.form-status { display: none; padding: 12px 14px; border-left: 4px solid var(--amber); background: #fff8e9; }
.form-status.visible { display: block; }
.contact-cards a { overflow-wrap: anywhere; }
.floating-whatsapp { position: fixed; right: 18px; bottom: 18px; z-index: 40; display: inline-flex; align-items: center; gap: 9px; padding: .75rem .95rem; border-radius: 999px; color: var(--white); background: #16775a; box-shadow: 0 10px 28px rgba(0,0,0,.2); font-size: .88rem; font-weight: 850; text-decoration: none; }
.floating-whatsapp:hover { color: var(--white); background: #105b45; }
.site-footer { padding: 58px 0 18px; color: #cddce3; background: #061a2d; }
.footer-grid { display: grid; grid-template-columns: 1.35fr .8fr .8fr 1.05fr; gap: 42px; }
.site-footer h2, .site-footer h3 { color: var(--white); }
.site-footer h3 { font-size: .9rem; letter-spacing: .06em; text-transform: uppercase; }
.site-footer a { color: #d8e8ee; text-decoration: none; }
.site-footer ul { margin: 0; padding: 0; list-style: none; }
.site-footer li { margin: .4rem 0; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 42px; padding-top: 18px; border-top: 1px solid #284154; color: #91a7b4; font-size: .82rem; }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 290px; gap: 50px; }
.article-body h2 { margin-top: 2rem; }
.article-body h3 { margin-top: 1.5rem; }
.article-body p, .article-body li { max-width: 780px; }
.article-body li { margin-bottom: .45rem; }
.sidebar { align-self: start; position: sticky; top: 108px; }
.sidebar .card + .card { margin-top: 18px; }
.notice { padding: 18px; border: 1px solid #d8c28b; background: #fff9ea; }
.kicker-strip { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.kicker-strip span { padding: 5px 9px; border: 1px solid rgba(139,203,215,.45); border-radius: 3px; color: #d8edf1; font-size: .8rem; }

@media (max-width: 1050px) {
  .header-inner { gap: 12px; }
  .main-nav > a, .nav-group > button { padding-inline: .42rem; font-size: .9rem; }
  .header-cta { display: none; }
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .process { grid-template-columns: repeat(3, 1fr); }
  .hero-grid { grid-template-columns: 1fr .7fr; gap: 35px; }
  .footer-grid { grid-template-columns: 1.2fr 1fr 1fr; }
  .footer-grid > :last-child { grid-column: 1 / -1; }
}

@media (max-width: 820px) {
  .utility-bar { display: none; }
  .site-header { position: relative; }
  .header-inner { min-height: 67px; }
  .nav-toggle { display: inline-flex; }
  .main-nav { position: absolute; top: 100%; left: 0; right: 0; display: none; align-items: stretch; padding: 14px 20px 22px; border-bottom: 1px solid var(--line); background: var(--white); box-shadow: var(--shadow); }
  .main-nav.open { display: grid; }
  .main-nav > a, .nav-group > button { width: 100%; justify-content: space-between; padding: .72rem .5rem; }
  .nav-menu { position: static; min-width: 0; margin: 0 0 8px 10px; border: 0; border-left: 2px solid var(--line); border-radius: 0; box-shadow: none; }
  .nav-group:focus-within .nav-menu { display: none; }
  .nav-group.open .nav-menu { display: grid; }
  .hero-grid { grid-template-columns: 1fr; min-height: auto; }
  .tech-panel { min-height: 350px; }
  .membrane-stack { min-height: 190px; }
  .membrane-sheet { height: 175px; }
  .membrane-sheet:nth-child(2), .membrane-sheet:nth-child(4) { height: 205px; }
  .section-heading, .split, .split.wide-left, .article-layout { grid-template-columns: 1fr; }
  .product-gallery { grid-template-columns: 1fr 1fr; }
  .product-media.wide { grid-column: 1 / -1; }
  .section-heading { gap: 10px; }
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sidebar { position: static; }
  .cta-band { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid > :last-child { grid-column: auto; }
}

@media (max-width: 560px) {
  .container, .narrow { width: min(calc(100% - 28px), var(--container)); }
  .section { padding: 54px 0; }
  .hero-grid { padding: 54px 0; }
  h1 { font-size: 2.35rem; }
  .grid-2, .grid-3, .grid-4, .footer-grid, .form-grid { grid-template-columns: 1fr; }
  .product-gallery { grid-template-columns: 1fr; }
  .product-media.wide { grid-column: auto; }
  .product-gallery .portrait, .product-media.portrait { height: 480px; }
  .process { grid-template-columns: 1fr; }
  .process .step { min-height: auto; }
  .field.full { grid-column: auto; }
  .tech-panel { min-height: 310px; padding: 18px; }
  .membrane-sheet { width: 44px; }
  .tech-caption { grid-template-columns: 1fr; }
  .floating-whatsapp span { display: none; }
  .floating-whatsapp { width: 48px; height: 48px; justify-content: center; padding: 0; font-size: 1rem; }
  .footer-bottom { display: grid; }
  .cta-band { padding: 26px 22px; }
  .button-row .button { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}