:root{
  --ink:#11110f;--ink2:#181815;--paper:#f3efe7;--warm:#e7e0d4;--white:#fff;
  --line:rgba(17,17,15,.16);--line-light:rgba(243,239,231,.2);
  --serif:"Iowan Old Style", "Baskerville", "Times New Roman", Georgia, serif;
  --sans:Inter, Helvetica, Arial, sans-serif;--max:1380px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);line-height:1.55}a{color:inherit;text-decoration:none}img{display:block;width:100%;height:auto}.skip-link{position:fixed;left:18px;top:-60px;z-index:999;padding:10px 14px;background:var(--ink);color:var(--paper)}.skip-link:focus{top:18px}
.container,.header-inner{width:min(calc(100% - 56px),var(--max));margin:0 auto}.site-header{position:sticky;top:0;z-index:50;background:rgba(243,239,231,.96);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}.header-inner{min-height:82px;display:flex;align-items:center;justify-content:space-between;gap:22px}.brand{display:inline-flex;align-items:baseline;gap:8px}.brand-mark,.brand-name{font-family:var(--serif);font-weight:400}.brand-mark{font-size:31px}.brand-name{font-size:30px}.primary-nav{display:flex;align-items:center;gap:25px;font-size:11px;letter-spacing:.16em;text-transform:uppercase}.primary-nav>a{padding:8px 0}.primary-nav>a:hover{opacity:.58}.nav-actions{display:flex;gap:10px;margin-left:6px}.menu-toggle{display:none;border:1px solid var(--line);background:none;width:46px;height:46px;padding:9px}.menu-toggle span{display:block;height:1px;background:var(--ink);margin:5px 0}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:0 23px;border:1px solid transparent;font-size:10px;letter-spacing:.16em;text-transform:uppercase;transition:.18s ease}.button-dark{background:var(--ink);color:var(--paper)}.button-dark:hover{background:#2a2a25}.button-light{background:var(--paper);color:var(--ink)}.button-outline{border-color:var(--ink)}.button-outline:hover{background:var(--ink);color:var(--paper)}.button-outline-light{border-color:rgba(243,239,231,.55);color:var(--paper)}.button-outline-light:hover{background:var(--paper);color:var(--ink)}.line-link{display:inline-block;margin-top:18px;padding-bottom:4px;border-bottom:1px solid currentColor;text-transform:uppercase;font-size:10px;letter-spacing:.16em}.line-link-light{color:var(--paper)}
.section{padding:140px 0}.section-light{background:var(--paper)}.section-mid{background:var(--warm)}.section-dark{background:var(--ink);color:var(--paper)}.eyebrow{margin:0 0 18px;font-size:10px;letter-spacing:.24em;text-transform:uppercase;opacity:.54}.section-head{max-width:900px}.section-head.narrow{max-width:740px}.section-head h2,.intro h2,.story-copy h2,.split-grid h2,.about h2,.collaborate h2{margin:0;font-family:var(--serif);font-weight:400;font-size:clamp(48px,6vw,92px);line-height:.96;letter-spacing:-.025em}.section-head>p:last-child{max-width:650px;font-size:18px;opacity:.68;margin-top:25px}.section-head-dark .eyebrow{opacity:.5}
.hero{position:relative;display:grid;grid-template-columns:1.08fr .92fr;min-height:calc(100vh - 82px);background:var(--ink);color:var(--paper);overflow:hidden}.hero-media{min-height:calc(100vh - 82px);overflow:hidden}.hero-media img{width:100%;height:100%;object-fit:cover;object-position:center}.hero-panel{display:flex;flex-direction:column;justify-content:center;padding:80px clamp(36px,6vw,104px);background:linear-gradient(135deg,#11110f,#1b1b18)}.hero-panel h1{margin:0;font-family:var(--serif);font-size:clamp(62px,7vw,118px);line-height:.87;letter-spacing:-.04em;font-weight:400}.hero-panel h1 em{font-style:italic}.hero-lead{max-width:590px;font-size:18px;line-height:1.7;color:rgba(243,239,231,.72);margin:34px 0 0}.hero-actions{display:flex;align-items:center;gap:25px;margin-top:38px}.hero-meta{display:flex;align-items:baseline;gap:20px;flex-wrap:nowrap;border-top:1px solid var(--line-light);margin-top:64px;padding-top:18px;font-size:9px;letter-spacing:.18em;color:rgba(243,239,231,.45)}
.intro-grid,.story-grid,.split-grid,.about-grid,.collaborate-grid,.sustainability-grid{display:grid;grid-template-columns:1fr 1fr;gap:90px;align-items:end}.intro h2{font-size:clamp(48px,5.2vw,80px)}.intro-grid{align-items:stretch;min-height:360px}.intro-copy{align-self:center;display:flex;flex-direction:column;justify-content:center;max-width:620px;font-size:19px;color:rgba(17,17,15,.7)}.intro-copy p{margin:0 0 25px}
.material-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:76px}.material-card{display:grid;grid-template-rows:auto 1fr;min-height:620px}.material-image{height:390px;overflow:hidden}.material-image img{width:100%;height:100%;object-fit:cover}.material-card-dark{background:var(--ink);color:var(--paper)}.material-card-light{background:#ddd5c8}.material-copy{display:flex;flex-direction:column;justify-content:flex-end;padding:38px}.material-copy .index{font-size:10px;letter-spacing:.16em;opacity:.5;margin:auto 0 18px}.material-copy h3{font-family:var(--serif);font-size:clamp(42px,4.4vw,68px);font-weight:400;line-height:.98;margin:0}.material-copy>p:not(.index){max-width:580px;font-size:17px;opacity:.7;margin:20px 0 0}
.story-grid{align-items:stretch}.story-image{min-height:720px}.story-image img{height:100%;object-fit:cover}.story-copy{display:flex;flex-direction:column;justify-content:center;max-width:680px}.story-copy h2{font-size:clamp(48px,5.4vw,86px)}.story-copy>p:not(.eyebrow){font-size:18px;color:rgba(243,239,231,.7);max-width:600px}.story-copy .button{align-self:flex-start;margin-top:28px}
.application-grid{margin-top:70px;border-top:1px solid var(--line);display:grid;grid-template-columns:1fr 1fr}.application-grid a{min-height:94px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:24px;padding:0 6px;font-family:var(--serif);font-size:clamp(24px,2.2vw,34px);transition:.18s ease}.application-grid a:hover{padding-left:20px}.application-grid span{font-family:var(--sans);font-size:10px;letter-spacing:.15em;opacity:.42}
.process-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:25px;margin-top:80px}.process-grid>div{border-top:1px solid var(--line-light);padding-top:18px}.process-grid span{font-size:10px;letter-spacing:.16em;opacity:.45}.process-grid h3{font-family:var(--serif);font-size:36px;font-weight:400;margin:55px 0 12px}.process-grid p{margin:0;color:rgba(243,239,231,.62)}
.project-feature{display:grid;grid-template-columns:1.25fr .75fr;background:#dfd7cb;margin-top:68px}.project-image{min-height:570px}.project-image img{height:100%;object-fit:cover}.project-copy{display:flex;flex-direction:column;justify-content:center;padding:55px}.project-copy h3{font-family:var(--serif);font-size:clamp(40px,4vw,62px);font-weight:400;line-height:1;margin:0}.project-copy p:not(.eyebrow){font-size:18px;color:rgba(17,17,15,.68)}
.specification-preview .split-grid,.specifier .split-grid{align-items:center}.split-grid>div:last-child{max-width:650px;font-size:18px;color:rgba(17,17,15,.68)}.split-grid .button{margin-top:25px}
.sustainability-grid{align-items:center}.sustainability-grid>div:first-child{max-width:720px}.metrics{display:grid;gap:24px}.metrics>div{border-top:1px solid var(--line-light);padding-top:18px}.metrics strong{display:block;font-size:29px;letter-spacing:.02em;font-weight:400}.metrics span{display:block;margin-top:7px;color:rgba(243,239,231,.6);font-size:14px}
.about-grid{align-items:center}.about-grid>div:last-child{max-width:580px;justify-self:end}.about-grid img{max-height:620px;object-fit:cover}
.cta-panel{max-width:600px}.cta-panel p{font-size:19px;color:rgba(243,239,231,.68)}.cta-actions{display:flex;gap:12px;margin-top:26px;flex-wrap:wrap}
.site-footer{background:#090908;color:var(--paper)}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr .8fr;gap:60px;padding:80px 0}.brand-footer{color:var(--paper)}.footer-grid>div>p:not(.footer-label){color:rgba(243,239,231,.58)}.footer-grid a{display:block;color:rgba(243,239,231,.68);margin:0 0 10px}.footer-grid a:hover{color:var(--paper)}.footer-label{font-size:9px;letter-spacing:.18em;text-transform:uppercase;opacity:.42}.footer-bottom{border-top:1px solid rgba(243,239,231,.11)}.footer-bottom .container{min-height:64px;display:flex;justify-content:space-between;align-items:center;gap:25px;font-size:9px;letter-spacing:.1em;text-transform:uppercase;color:rgba(243,239,231,.32)}
@media(max-width:1080px){.primary-nav{gap:15px}.nav-actions{display:none}.hero{grid-template-columns:1fr 1fr}.hero-panel{padding:65px 44px}.process-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1.3fr 1fr}.container,.header-inner{width:min(calc(100% - 38px),var(--max))}}
@media(max-width:820px){.intro-grid{min-height:0}.intro-copy{align-self:auto;display:flex}.container,.header-inner{width:calc(100% - 32px)}.menu-toggle{display:block}.primary-nav{position:absolute;top:82px;left:0;right:0;display:none;background:var(--paper);border-bottom:1px solid var(--line);padding:16px}.primary-nav.is-open{display:flex}.primary-nav>a{padding:16px 0;border-bottom:1px solid var(--line)}.hero{grid-template-columns:1fr}.hero-media{height:54vh;min-height:0}.hero-panel{padding:72px 24px 78px}.hero-meta{margin-top:48px}.intro-grid,.story-grid,.split-grid,.about-grid,.collaborate-grid,.sustainability-grid{grid-template-columns:1fr;gap:42px}.material-grid{grid-template-columns:1fr}.application-grid{grid-template-columns:1fr}.project-feature{grid-template-columns:1fr}.project-image{min-height:440px}.section{padding:96px 0}.story-image{min-height:480px}.about-grid>div:last-child{justify-self:start;max-width:100%}.footer-grid{grid-template-columns:1fr;gap:38px}.footer-bottom .container{padding:18px 0;align-items:flex-start;flex-direction:column}}
@media(max-width:540px){.hero-meta{flex-wrap:wrap;gap:12px}.hero-panel h1{font-size:clamp(50px,15vw,74px)}.section-head h2,.intro h2,.story-copy h2,.split-grid h2,.about h2,.collaborate h2{font-size:clamp(43px,13vw,66px)}.hero-actions,.cta-actions{align-items:flex-start;flex-direction:column}.material-image{height:300px}.material-copy{padding:30px}.process-grid{grid-template-columns:1fr}.process-grid h3{margin-top:30px}.footer-grid{padding:60px 0}}

/* Surfaces dropdown navigation */
.surfaces-dropdown{position:relative;display:flex;align-items:center}
.surfaces-toggle{appearance:none;border:0;background:transparent;color:inherit;font:inherit;text-transform:uppercase;letter-spacing:.16em;font-size:11px;padding:8px 0;cursor:pointer;display:inline-flex;align-items:center;gap:7px}
.surfaces-toggle span{font-size:14px;line-height:1;opacity:.55;transition:transform .18s ease}
.surfaces-dropdown.is-open .surfaces-toggle span{transform:rotate(45deg)}
.surfaces-toggle:hover{opacity:.58}
.surfaces-menu{position:absolute;top:calc(100% + 10px);left:-18px;min-width:255px;padding:10px;background:rgba(243,239,231,.98);border:1px solid var(--line);box-shadow:0 18px 45px rgba(0,0,0,.11);display:none;z-index:80}
.surfaces-dropdown:hover .surfaces-menu,.surfaces-dropdown:focus-within .surfaces-menu,.surfaces-dropdown.is-open .surfaces-menu{display:block}
.surfaces-menu a{display:block!important;padding:13px 14px!important;border-bottom:1px solid var(--line);font-size:10px;letter-spacing:.12em;text-transform:uppercase}
.surfaces-menu a:last-child{border-bottom:0}
.surfaces-menu a:hover{background:var(--warm);opacity:1!important}
@media(max-width:820px){
  .primary-nav .surfaces-dropdown{display:block;width:100%}
  .primary-nav .surfaces-toggle{width:100%;justify-content:space-between;padding:16px 0;border-bottom:1px solid var(--line)}
  .primary-nav .surfaces-menu{position:static;min-width:0;padding:0;border:0;box-shadow:none;background:transparent}
  .primary-nav .surfaces-dropdown:not(.is-open) .surfaces-menu{display:none}
  .primary-nav .surfaces-menu a{padding:14px 12px!important;font-size:9px}
}


/* Applications dropdown navigation */
.applications-dropdown{position:relative;display:flex;align-items:center}
.applications-toggle{appearance:none;border:0;background:transparent;color:inherit;font:inherit;text-transform:uppercase;letter-spacing:.16em;font-size:11px;padding:8px 0;cursor:pointer;display:inline-flex;align-items:center;gap:7px}
.applications-toggle span{font-size:14px;line-height:1;opacity:.55;transition:transform .18s ease}
.applications-dropdown.is-open .applications-toggle span{transform:rotate(45deg)}
.applications-toggle:hover{opacity:.58}
.applications-menu{position:absolute;top:calc(100% + 10px);left:-18px;min-width:310px;max-height:70vh;overflow:auto;padding:10px;background:rgba(243,239,231,.98);border:1px solid var(--line);box-shadow:0 18px 45px rgba(0,0,0,.11);display:none;z-index:80}
.applications-dropdown:hover .applications-menu,.applications-dropdown:focus-within .applications-menu,.applications-dropdown.is-open .applications-menu{display:block}
.applications-menu a{display:block!important;padding:12px 14px!important;border-bottom:1px solid var(--line);font-size:10px;letter-spacing:.10em;text-transform:uppercase}
.applications-menu a:last-child{border-bottom:0}
.applications-menu a:hover{background:var(--warm);opacity:1!important}
@media(max-width:820px){
  .primary-nav .applications-dropdown{display:block}
  .primary-nav .applications-toggle{width:100%;justify-content:space-between;padding:16px 0;border-bottom:1px solid var(--line)}
  .primary-nav .applications-menu{position:static;min-width:0;max-height:none;padding:0;border:0;box-shadow:none;background:transparent}
  .primary-nav .applications-dropdown:not(.is-open) .applications-menu{display:none}
  .primary-nav .applications-menu a{padding:14px 12px!important;font-size:9px}
}

/* Official S3 Surfaces logo asset */
.brand-logo{display:block;width:148px;height:auto;max-height:42px;object-fit:contain;object-position:left center}.brand:has(.brand-logo){display:flex;align-items:center;line-height:0}.brand-footer .brand-logo{width:168px}@media(max-width:800px){.brand-logo{width:132px}.brand-footer .brand-logo{width:150px}}

.sustainability-home-cta{display:flex;align-items:center;justify-content:space-between;gap:28px;margin-top:34px;padding-top:26px;border-top:1px solid rgba(255,255,255,.22)}.sustainability-home-cta p{margin:0;color:#c9c7c0;max-width:620px;line-height:1.55}.sustainability-home-cta .button{white-space:nowrap}@media(max-width:700px){.sustainability-home-cta{align-items:flex-start;flex-direction:column}}