:root {
    --primary: #0d9488;
    --primary-dark: #0f766e;
    --secondary: #0f172a;
    --text: #334155;
    --light: #f8fafc;
    --shadow: 0 10px 30px rgba(0,0,0,0.08);
    --radius: 16px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Montserrat',sans-serif;color:var(--text);line-height:1.7}
.container{width:min(1120px,calc(100% - 2rem));margin:auto}
.header{position:fixed;top:0;width:100%;background:rgba(255,255,255,.95);backdrop-filter:blur(10px);box-shadow:0 2px 20px rgba(0,0,0,.05);z-index:1000}
.nav-container{display:flex;justify-content:space-between;align-items:center;padding:1rem 0}
.logo{font-size:1.8rem;font-weight:800;color:var(--secondary)}
.logo span{color:var(--primary)}
.nav{display:flex;gap:2rem}
.nav a{text-decoration:none;color:var(--secondary);font-weight:600}
.btn{display:inline-block;padding:.9rem 1.6rem;border-radius:999px;text-decoration:none;font-weight:700;transition:.3s}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark)}
.btn-outline{border:2px solid #fff;color:#fff}
.hero{min-height:100vh;display:flex;align-items:center;background:linear-gradient(rgba(15,23,42,.7),rgba(15,23,42,.7)),url('https://images.unsplash.com/photo-1581578731548-c64695cc6952?auto=format&fit=crop&w=1600&q=80') center/cover;color:#fff;text-align:center}
.hero-content{max-width:800px}
.hero h1{font-size:clamp(2.5rem,5vw,4.5rem);line-height:1.1;margin-bottom:1.5rem}
.hero p{font-size:1.2rem;margin-bottom:2rem}
.hero-buttons{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}
.section{padding:6rem 0}
.bg-light{background:var(--light)}
.section-tag{display:inline-block;color:var(--primary);font-weight:700;margin-bottom:.5rem;text-transform:uppercase;font-size:.85rem;letter-spacing:1px}
.section-title,.section h2{font-size:2.5rem;margin-bottom:1.5rem;color:var(--secondary)}
.grid{display:grid;gap:2rem}
.cards-3{grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}
.cards-4{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.card,.about-card,.contact-form{background:#fff;padding:2rem;border-radius:var(--radius);box-shadow:var(--shadow)}
.card h3{margin-bottom:1rem;color:var(--secondary)}
.about-grid,.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:3rem;align-items:start}
.about-card ul{padding-left:1.2rem}
.contact-form{display:flex;flex-direction:column;gap:1rem}
.contact-form input,.contact-form textarea{width:100%;padding:1rem;border:1px solid #d1d5db;border-radius:12px;font-family:inherit}
.footer{background:var(--secondary);color:#fff;text-align:center;padding:2rem 0}
@media (max-width:768px){
    .nav,.header .btn{display:none}
    .section{padding:4rem 0}
    .hero h1{font-size:2.5rem}
}