:root{
  --navy:#061a2c;
  --navy-2:#092b45;
  --blue:#0b476b;
  --blue-light:#1d7199;
  --silver:#cfd5d9;
  --silver-2:#f4f5f5;
  --white:#fff;
  --ink:#12202a;
  --muted:#66747e;
  --line:rgba(6,26,44,.12);
  --accent:#b8c4ca;
  --max:1240px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Montserrat,Arial,sans-serif;color:var(--ink);background:#f7f8f8;line-height:1.6}
a{color:inherit;text-decoration:none}
.site-header{height:76px;padding:0 max(28px,calc((100vw - 1400px)/2));display:flex;align-items:center;justify-content:space-between;position:fixed;top:0;left:0;right:0;z-index:20;background:rgba(4,20,34,.88);backdrop-filter:blur(14px);border-bottom:1px solid rgba(255,255,255,.08)}
.brand-mini{display:flex;align-items:center;gap:12px;color:#fff}
.brand-mark{font-weight:800;font-size:25px;letter-spacing:-2px}
.brand-name{font-size:10px;letter-spacing:4px;color:#cdd5da}
.nav{display:flex;gap:30px;color:#dbe3e7;font-size:12px;font-weight:600;letter-spacing:.8px}
.nav a:hover{color:#fff}
.header-cta{border:1px solid rgba(255,255,255,.35);padding:10px 18px;border-radius:4px;color:#fff;font-size:11px;font-weight:700;letter-spacing:1px}
.header-cta span{margin-left:8px}
.hero{min-height:760px;position:relative;display:flex;align-items:center;overflow:hidden;background:var(--navy)}
.hero-bg{position:absolute;inset:0;background-image:url("assets/osp-brand.png");background-size:cover;background-position:center}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(90deg,rgba(3,19,31,.92) 0%,rgba(3,19,31,.62) 38%,rgba(3,19,31,.18) 75%),linear-gradient(0deg,rgba(3,19,31,.45),transparent 35%,rgba(3,19,31,.2))}
.hero-content{position:relative;z-index:2;width:min(var(--max),calc(100% - 56px));margin:90px auto 0;color:#fff}
.eyebrow,.section-kicker{font-size:10px;letter-spacing:3px;font-weight:700;color:#6e92a8;margin-bottom:18px}
.eyebrow{color:#cbd7dd}
.hero h1{font-family:"Playfair Display",serif;font-size:clamp(48px,6vw,88px);line-height:.98;margin:0 0 24px;font-weight:700;max-width:800px;letter-spacing:-2px}
.hero h1 em,.section h2 em{font-style:normal;color:#d6dee2}
.hero p{font-size:16px;max-width:620px;color:#d5dfe4;margin:0 0 32px}
.hero-actions{display:flex;gap:13px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:0 22px;border-radius:3px;font-size:11px;font-weight:800;letter-spacing:1px}
.btn-primary{background:#fff;color:var(--navy)}
.btn-primary span{margin-left:16px;font-size:17px}
.btn-outline{border:1px solid rgba(255,255,255,.5);color:#fff}
.btn:hover{transform:translateY(-2px);transition:.2s}
.hero-trust{display:flex;gap:16px;align-items:center;margin-top:58px;font-size:10px;letter-spacing:3px;color:#bac7ce}
.hero-trust i{width:3px;height:3px;background:#7e98a7;border-radius:50%}
.hero-scroll{position:absolute;right:32px;bottom:32px;color:#b6c4cb;font-size:9px;letter-spacing:2px;z-index:2;writing-mode:vertical-rl}
.hero-scroll span{font-size:17px;margin-top:8px}
.section{padding:110px max(28px,calc((100vw - var(--max))/2))}
.intro{background:#fff}
.intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:90px;align-items:start}
.section h2{font-family:"Playfair Display",serif;font-size:clamp(42px,5vw,68px);line-height:1.04;letter-spacing:-1.5px;margin:0 0 22px}
.section h2 span{color:#4b6d80}
.lead{font-size:20px;line-height:1.55;color:#263945}
.intro-grid p:not(.lead){color:var(--muted)}
.pillars{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:70px;border-top:1px solid var(--line)}
.pillars article{padding:28px 15px 0 0}
.pillars b,.project-grid span{font-size:11px;letter-spacing:2px;color:#7a8d98}
.pillars strong{display:block;margin:18px 0 7px;font-size:17px}
.pillars p{font-size:13px;color:var(--muted);margin:0}
.dark{background:var(--navy);color:#fff}
.section-kicker.light{color:#7898aa}
.section-head{display:flex;justify-content:space-between;gap:60px;align-items:end;margin-bottom:45px}
.section-head h2{max-width:680px}
.section-head p{max-width:410px;color:#aebfc8;margin:0 0 8px}
.brand-cards{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.brand-card{min-height:430px;padding:42px;display:flex;flex-direction:column;justify-content:flex-end;position:relative;overflow:hidden;border:1px solid rgba(255,255,255,.1)}
.fv-card{background:radial-gradient(circle at 80% 15%,#175b82 0,#0b324e 34%,#071b2b 75%)}
.ferrum-card{background:radial-gradient(circle at 20% 20%,#bfc8cc 0,#687983 30%,#263b47 67%,#101e27 100%)}
.brand-card:before{content:"";position:absolute;width:250px;height:250px;border:1px solid rgba(255,255,255,.16);border-radius:50%;right:-90px;top:-80px}
.brand-card-top{position:absolute;top:36px;left:42px;right:42px;display:flex;justify-content:space-between;align-items:center}
.brand-badge{font-size:45px;font-weight:800;letter-spacing:-5px}
.ferrum-badge{border:2px solid #fff;border-radius:50%;width:48px;height:48px;display:grid;place-items:center;font-size:25px;letter-spacing:-2px}
.category{font-size:9px;letter-spacing:3px;color:#c1d0d7}
.brand-card h3{font-family:"Playfair Display",serif;font-size:54px;margin:0}
.brand-card p{max-width:500px;color:#d2dde2;font-size:14px;margin:6px 0 24px}
.brand-card a{font-size:11px;font-weight:800;letter-spacing:1px}
.brand-card a span{margin-left:15px}
.product-section{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center;background:#fff}
.product-section:nth-of-type(even){background:#f1f4f5}
.product-visual{min-height:610px;position:relative;overflow:hidden;display:flex;align-items:flex-end;padding:45px;color:#fff}
.fv-visual{background:linear-gradient(145deg,#0b4a6d,#051b2c);box-shadow:inset 0 0 100px rgba(0,0,0,.3)}
.fv-visual:before,.fv-visual:after{content:"";position:absolute;border:1px solid rgba(255,255,255,.14);border-radius:50%}
.fv-visual:before{width:520px;height:520px;left:-210px;top:-180px}
.fv-visual:after{width:380px;height:380px;right:-170px;bottom:-130px}
.ferrum-visual{background:linear-gradient(145deg,#d8dee1,#5e7079);color:#10232f}
.ferrum-visual:before{content:"";position:absolute;width:330px;height:520px;border-radius:170px 170px 30px 30px;background:linear-gradient(145deg,rgba(255,255,255,.8),rgba(255,255,255,.08));right:12%;top:9%;transform:rotate(7deg);box-shadow:-25px 35px 55px rgba(0,0,0,.18)}
.visual-label{position:absolute;top:40px;left:45px;font-size:70px;font-weight:800;letter-spacing:-6px;z-index:2}
.visual-copy{position:relative;z-index:3;font-size:11px;letter-spacing:4px;font-weight:700}
.visual-copy span{opacity:.65}
.product-copy h2{font-size:80px;margin-bottom:0}
.product-copy h3{font-size:20px;margin:0 0 12px;color:#37586b}
.product-copy>p:not(.lead){color:var(--muted);max-width:580px}
.feature-grid{display:grid;grid-template-columns:1fr 1fr;gap:0;border-top:1px solid var(--line);margin-top:35px}
.feature-grid div{padding:20px 18px 20px 0;border-bottom:1px solid var(--line)}
.feature-grid span{display:block;font-size:9px;letter-spacing:2px;color:#78909d;margin-bottom:7px}
.feature-grid b{display:block;font-size:13px}
.feature-grid small{display:block;color:#7b8991;margin-top:3px;font-size:10px}
.text-link{display:inline-block;margin-top:30px;font-size:11px;font-weight:800;letter-spacing:1px;border-bottom:1px solid #8ba0ab;padding-bottom:6px}
.text-link span{margin-left:16px}
.specs{background:#e9eef0}
.specs-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:100px}
.specs-grid>div>p{color:var(--muted);max-width:470px}
.spec-list{border-top:1px solid rgba(6,26,44,.18)}
.spec-list div{display:grid;grid-template-columns:150px 1fr;gap:20px;padding:19px 0;border-bottom:1px solid rgba(6,26,44,.14)}
.spec-list span{font-size:9px;letter-spacing:2px;color:#718793;font-weight:700}
.spec-list b{font-size:12px}
.note{font-size:10px;color:#77868e;margin-top:20px}
.ferrum-section{background:#f5f6f6}
.material{background:#fff;padding-top:40px}
.material-card{background:linear-gradient(130deg,#071d2e,#0b4566);color:#fff;padding:75px;position:relative;overflow:hidden}
.material-card:after{content:"";position:absolute;width:500px;height:500px;border:1px solid rgba(255,255,255,.08);border-radius:50%;right:-170px;top:-160px}
.material-number{position:absolute;right:50px;bottom:25px;font-size:130px;font-weight:800;color:rgba(255,255,255,.035)}
.material-card h2{max-width:800px}
.material-card p{max-width:690px;color:#bdcdd5}
.material-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:25px;margin-top:50px;border-top:1px solid rgba(255,255,255,.16);padding-top:25px}
.material-stats b{display:block;font-size:21px}
.material-stats span{display:block;color:#a8bbc5;font-size:10px;line-height:1.5;margin-top:5px;max-width:190px}
.projects{background:#fff}
.project-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line)}
.project-grid article{padding:32px 22px 10px 0;border-right:1px solid var(--line);margin-right:22px}
.project-grid article:last-child{border-right:0}
.project-grid h3{font-size:17px;margin:24px 0 8px}
.project-grid p{font-size:12px;color:var(--muted);margin:0}
.cta-section{background:var(--navy);color:#fff;padding:105px 28px}
.cta-inner{width:min(900px,100%);margin:auto;text-align:center}
.cta-inner h2{font-family:"Playfair Display",serif;font-size:clamp(45px,6vw,72px);line-height:1.05;margin:0 0 20px;letter-spacing:-1px}
.cta-inner p{color:#b7c7cf;max-width:620px;margin:0 auto 38px}
.whatsapp-buttons{display:grid;grid-template-columns:1fr 1fr;gap:14px;max-width:760px;margin:auto}
.wa-btn{display:grid;grid-template-columns:auto 1fr auto;align-items:center;text-align:left;gap:14px;background:#fff;color:var(--navy);padding:16px 18px;border-radius:4px;transition:.2s}
.wa-btn:hover{transform:translateY(-3px);box-shadow:0 12px 30px rgba(0,0,0,.22)}
.wa-icon{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:#dce8ed;color:#0a536f;font-size:9px;font-weight:800}
.wa-btn small{display:block;font-size:8px;letter-spacing:2px;color:#72848e;font-weight:700}
.wa-btn b{display:block;font-size:13px;margin-top:2px}
.wa-btn strong{font-size:20px;color:#628193}
footer{background:#04111d;color:#aebcc3;padding:30px max(28px,calc((100vw - var(--max))/2));display:flex;align-items:center;justify-content:space-between;gap:25px;font-size:10px}
.footer-brand{display:flex;align-items:center;gap:13px;color:#fff}
.footer-brand strong{display:block;font-size:11px;letter-spacing:2px}
.footer-brand span{display:block;font-size:8px;letter-spacing:2px;color:#82939d}
footer p{margin:0}
@media(max-width:900px){
  .nav{display:none}
  .hero{min-height:700px}
  .hero-bg{background-position:65% center}
  .intro-grid,.product-section,.specs-grid{grid-template-columns:1fr;gap:40px}
  .pillars,.brand-cards{grid-template-columns:1fr}
  .product-visual{min-height:430px}
  .section-head{display:block}
  .section-head p{margin-top:20px}
  .project-grid{grid-template-columns:1fr 1fr}
  .project-grid article:nth-child(2){border-right:0}
  .material-card{padding:50px 35px}
}
@media(max-width:600px){
  .site-header{height:66px;padding:0 18px}
  .brand-name{font-size:8px;letter-spacing:2px}
  .header-cta{padding:8px 11px}
  .hero{min-height:680px}
  .hero-content{width:calc(100% - 38px);margin-top:70px}
  .hero-bg{background-position:62% center}
  .hero h1{font-size:48px}
  .hero p{font-size:14px}
  .hero-trust{gap:8px;font-size:8px;letter-spacing:1.5px}
  .hero-scroll{display:none}
  .section{padding:75px 20px}
  .section h2{font-size:44px}
  .brand-card{min-height:390px;padding:30px}
  .brand-card-top{left:30px;right:30px}
  .product-copy h2{font-size:62px}
  .product-visual{min-height:360px;padding:30px}
  .visual-label{top:25px;left:30px;font-size:55px}
  .feature-grid{grid-template-columns:1fr}
  .spec-list div{grid-template-columns:1fr;gap:5px}
  .material-stats{grid-template-columns:1fr}
  .project-grid{grid-template-columns:1fr}
  .project-grid article{border-right:0;margin-right:0}
  .whatsapp-buttons{grid-template-columns:1fr}
  footer{flex-direction:column;align-items:flex-start}
}