:root{--navy:#0a1628;--navy-mid:#11213d;--navy-light:#1a2f52;--teal:#00c9a7;--teal-bright:#00e6be;--teal-dark:#00a88c;--cyan:#00b4d8;--slate:#8892a4;--offwhite:#f4f6f9;--white:#fff;--earth:#c9a96e;--warning-amber:#f0a500;--font-display:'Instrument Serif',Georgia,serif;--font-body:'DM Sans',sans-serif;--ease:cubic-bezier(.16,1,.3,1)}*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:var(--font-body);color:var(--navy);background:var(--white);overflow-x:hidden;-webkit-font-smoothing:antialiased}a{text-decoration:none;color:inherit}.container{max-width:1280px;margin:0 auto;padding:0 40px}
.section-label{font-size:11px;font-weight:600;letter-spacing:3px;text-transform:uppercase;color:var(--teal);margin-bottom:16px;display:flex;align-items:center;gap:12px}.section-label::before{content:'';display:inline-block;width:24px;height:2px;background:var(--teal)}
.nav{position:fixed;top:0;left:0;right:0;z-index:1000;padding:16px 0;background:rgba(10,22,40,.95);backdrop-filter:blur(20px);box-shadow:0 4px 30px rgba(0,0,0,.2)}.nav-inner{display:flex;align-items:center;justify-content:space-between}.nav-logo{display:flex;align-items:center;gap:10px}.nav-logo-icon{width:36px;height:36px;border-radius:8px;background:linear-gradient(135deg,var(--teal),var(--cyan));display:flex;align-items:center;justify-content:center}.nav-logo-icon svg{width:20px;height:20px}.nav-logo-text{font-family:var(--font-display);font-size:26px;color:var(--white)}.nav-links{display:flex;align-items:center;gap:32px;list-style:none}.nav-links a{font-size:14px;font-weight:500;color:rgba(255,255,255,.7)}.nav-links a:hover,.nav-links a.active{color:#fff}.nav-cta{padding:10px 24px;border-radius:6px;background:var(--teal);color:var(--navy)!important;font-weight:600!important}
.nav-hamburger{display:none;flex-direction:column;justify-content:center;gap:5px;width:32px;height:32px;cursor:pointer;background:none;border:none;z-index:1001}.nav-hamburger span{display:block;width:24px;height:2px;background:#fff;border-radius:2px;transition:all .3s}.nav-hamburger.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}.nav-hamburger.active span:nth-child(2){opacity:0}.nav-hamburger.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}.mobile-menu{display:none;position:fixed;inset:0;z-index:999;background:var(--navy);padding:100px 32px 40px;flex-direction:column;overflow-y:auto}.mobile-menu.open{display:flex}.mobile-menu a{display:block;padding:18px 0;font-size:18px;color:rgba(255,255,255,.8);border-bottom:1px solid rgba(255,255,255,.06)}.mobile-menu .mobile-cta{margin-top:24px;padding:16px 32px;background:var(--teal);color:var(--navy);font-weight:700;border-radius:8px;border-bottom:none;text-align:center}
.btn{display:inline-flex;align-items:center;gap:8px;padding:16px 32px;border-radius:8px;font-size:15px;font-weight:600;cursor:pointer;border:none;transition:all .3s var(--ease)}.btn-primary{background:var(--teal);color:var(--navy)}.btn-primary:hover{background:var(--teal-bright);transform:translateY(-2px)}.btn-sm{padding:10px 20px;font-size:13px}.btn svg{width:18px;height:18px;transition:transform .3s}.btn:hover svg{transform:translateX(3px)}

.page-hero{padding:140px 0 64px;background:var(--navy);position:relative;overflow:hidden}.page-hero::before{content:'';position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);background-size:60px 60px;mask-image:radial-gradient(ellipse 80% 70% at 50% 50%,black 30%,transparent 80%)}.page-hero-content{position:relative;max-width:720px}.breadcrumb{font-size:13px;color:var(--slate);margin-bottom:16px}.breadcrumb a{color:var(--teal)}.page-hero h1{font-family:var(--font-display);font-size:clamp(36px,4.5vw,56px);line-height:1.1;color:#fff;margin-bottom:20px}.page-hero h1 em{font-style:italic;color:var(--teal)}.page-hero p{font-size:18px;line-height:1.7;color:var(--slate);max-width:580px}

.product-overview{padding:80px 0;background:var(--white)}.overview-grid{display:grid;grid-template-columns:2fr 1fr;gap:64px}.overview-content h2{font-family:var(--font-display);font-size:32px;color:var(--navy);margin-bottom:20px}.overview-content p{font-size:16px;line-height:1.8;color:#5a6476;margin-bottom:16px}
.overview-sidebar{display:flex;flex-direction:column;gap:16px}.sidebar-card{padding:28px;border-radius:12px;background:var(--offwhite);border:1px solid rgba(0,0,0,.04)}.sidebar-card h4{font-size:13px;font-weight:600;letter-spacing:1.5px;text-transform:uppercase;color:var(--teal-dark);margin-bottom:12px}.sidebar-card ul{list-style:none;display:flex;flex-direction:column;gap:8px}.sidebar-card ul li{font-size:14px;color:#5a6476;display:flex;align-items:center;gap:8px}.sidebar-card ul li::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--teal);flex-shrink:0}.sidebar-card p{font-size:14px;line-height:1.6;color:#5a6476;margin:0}

/* Single product specs — replaces the multi-variant grid */
.product-specs{padding:80px 0;background:var(--offwhite)}
.product-specs h2{font-family:var(--font-display);font-size:clamp(28px,3vw,40px);color:var(--navy);margin-bottom:12px}
.product-specs .sub{font-size:16px;line-height:1.8;color:#5a6476;max-width:680px;margin-bottom:48px}
.specs-panel{background:var(--white);border-radius:16px;padding:48px;border:1px solid rgba(0,0,0,.06)}
.specs-panel-header{display:flex;align-items:center;gap:20px;margin-bottom:32px;padding-bottom:24px;border-bottom:1px solid var(--offwhite)}
.specs-formula{font-family:var(--font-display);font-size:48px;color:var(--navy);line-height:1}
.specs-panel-header div h3{font-size:22px;font-weight:700;color:var(--navy);margin-bottom:4px}
.specs-panel-header div span{font-size:14px;color:var(--teal-dark);font-weight:600}
.specs-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:32px}
.spec-item{padding:20px;border-radius:12px;background:var(--offwhite)}
.spec-item-label{font-size:11px;font-weight:600;letter-spacing:1.5px;text-transform:uppercase;color:var(--slate);margin-bottom:6px}
.spec-item-value{font-size:17px;font-weight:700;color:var(--navy)}
.specs-description{font-size:15px;line-height:1.8;color:#5a6476;max-width:720px}

/* Chemistry explanation */
.chemistry{padding:80px 0;background:var(--white)}
.chemistry h2{font-family:var(--font-display);font-size:clamp(28px,3vw,40px);color:var(--navy);margin-bottom:12px}
.chemistry .sub{font-size:16px;line-height:1.8;color:#5a6476;max-width:680px;margin-bottom:40px}
.reaction-box{background:var(--navy);border-radius:16px;padding:48px;margin-bottom:40px;text-align:center}
.reaction-equation{font-family:var(--font-display);font-size:clamp(20px,2.5vw,32px);color:var(--teal);margin-bottom:12px;letter-spacing:1px}
.reaction-label{font-size:13px;color:var(--slate)}
.chemistry-points{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.chem-point{padding:28px;border-radius:12px;background:var(--offwhite);border:1px solid rgba(0,0,0,.04)}
.chem-point h4{font-size:15px;font-weight:700;color:var(--navy);margin-bottom:8px}
.chem-point p{font-size:13px;line-height:1.6;color:#6b7689}

/* Applications */
.applications{padding:80px 0;background:var(--offwhite)}
.applications h2{font-family:var(--font-display);font-size:clamp(28px,3vw,40px);color:var(--navy);margin-bottom:12px}
.applications .sub{font-size:16px;line-height:1.8;color:#5a6476;max-width:680px;margin-bottom:40px}
.app-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.app-card{background:var(--white);border-radius:12px;padding:32px;border:1px solid rgba(0,0,0,.04);transition:all .3s var(--ease)}
.app-card:hover{transform:translateY(-3px);box-shadow:0 12px 36px rgba(10,22,40,.06)}
.app-card h4{font-size:17px;font-weight:700;color:var(--navy);margin-bottom:8px}
.app-card p{font-size:14px;line-height:1.7;color:#6b7689}

.treated{padding:80px 0;background:var(--white)}.treated h2{font-family:var(--font-display);font-size:clamp(28px,3vw,40px);color:var(--navy);margin-bottom:12px}.treated .sub{font-size:16px;color:#5a6476;margin-bottom:40px;max-width:640px;line-height:1.7}.treated-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.treated-item{padding:20px 24px;border-radius:12px;background:var(--offwhite);border:1px solid rgba(0,0,0,.04);font-size:14px;font-weight:500;color:var(--navy);transition:all .3s}.treated-item:hover{background:var(--navy);color:#fff;transform:translateY(-2px)}

.cta-banner{padding:100px 0;background:var(--offwhite)}.cta-banner-box{background:linear-gradient(135deg,var(--navy),var(--navy-light));border-radius:24px;padding:64px;text-align:center;position:relative;overflow:hidden}.cta-banner-box::before{content:'';position:absolute;top:-100px;right:-100px;width:400px;height:400px;border-radius:50%;background:radial-gradient(circle,rgba(0,201,167,.12),transparent 70%)}.cta-banner-box h2{font-family:var(--font-display);font-size:clamp(28px,3vw,40px);color:#fff;margin-bottom:16px;position:relative}.cta-banner-box p{font-size:16px;color:var(--slate);margin-bottom:32px;max-width:560px;margin-left:auto;margin-right:auto;position:relative;line-height:1.7}.btn-row{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;position:relative}

.footer{background:var(--navy);padding:64px 0 32px;border-top:1px solid rgba(255,255,255,.06)}.footer-inner{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:48px;margin-bottom:48px}.footer-brand p{font-size:14px;line-height:1.7;color:var(--slate);margin-top:16px;max-width:280px}.footer-col h4{font-size:12px;font-weight:600;letter-spacing:2px;text-transform:uppercase;color:rgba(255,255,255,.4);margin-bottom:20px}.footer-col ul{list-style:none}.footer-col ul li{margin-bottom:12px}.footer-col ul li a{font-size:14px;color:var(--slate)}.footer-col ul li a:hover{color:var(--teal)}.footer-bottom{padding-top:32px;border-top:1px solid rgba(255,255,255,.06);display:flex;justify-content:space-between;align-items:center}.footer-bottom p{font-size:13px;color:rgba(255,255,255,.3)}

@media(max-width:768px){.container{padding:0 20px}.nav-links{display:none}.nav-hamburger{display:flex}.page-hero{padding:110px 0 48px}.page-hero h1{font-size:32px}.overview-grid{grid-template-columns:1fr;gap:40px}.specs-grid{grid-template-columns:1fr 1fr}.specs-panel{padding:32px 24px}.chemistry-points{grid-template-columns:1fr}.app-grid{grid-template-columns:1fr}.treated-grid{grid-template-columns:1fr 1fr}.product-overview,.product-specs,.chemistry,.applications,.treated{padding:60px 0}.cta-banner{padding:72px 0}.cta-banner-box{padding:40px 24px;border-radius:16px}.footer-inner{grid-template-columns:1fr;gap:36px}.footer-bottom{flex-direction:column;gap:16px;text-align:center}}

/* Featured visual blocks */
.featured-visual{margin:0 0 28px;border-radius:18px;overflow:hidden;border:1px solid rgba(0,0,0,.06);box-shadow:0 18px 44px rgba(10,22,40,.08);background:var(--white);position:relative}
.featured-visual::before{content:'';position:absolute;top:0;left:0;right:0;height:7px;background:linear-gradient(90deg,var(--teal),var(--cyan));z-index:2}
.featured-visual img{width:100%;height:320px;object-fit:cover;filter:grayscale(100%) brightness(1.04)}
.featured-visual-caption{padding:14px 18px;background:var(--offwhite);font-size:13px;line-height:1.6;color:#6b7689}
.featured-visual-caption strong{color:var(--navy)}
@media(max-width:768px){.featured-visual img{height:220px}}