:root {
    --primary-blue: #0f172a; 
    --accent-blue: #3b82f6; 
    --white: #ffffff;
    --bg-light: #f1f5f9;
}

* { 
    margin: 0; padding: 0; box-sizing: border-box; 
    font-family: 'Poppins', sans-serif; 
    scroll-behavior: smooth; 
}

/* --- NAVEGACIÓN --- */
nav { 
    background: var(--white); 
    padding: 0.1rem 3%; 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    position: fixed; 
    width: 100%; top: 0; z-index: 1000;
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
}

.brand img { 
    height: 85px; 
    width: auto;
}

nav ul { display: flex; list-style: none; }
nav ul li { margin-left: 25px; }
nav ul li a { text-decoration: none; color: var(--primary-blue); font-weight: 600; font-size: 15px; }

/* --- HERO --- */
.hero { 
    height: 85vh;
    margin-top: 100px;
    background: linear-gradient(rgba(15, 23, 42, 0.6), rgba(15, 23, 42, 0.6)), 
                url('https://images.unsplash.com/photo-1581092160562-40aa08e78837?q=80&w=1470');
    background-attachment: fixed;
    background-size: cover;
    background-position: center;
    display: flex; 
    flex-direction: column; 
    justify-content: center; 
    align-items: center; 
    color: white; 
    text-align: center; 
    padding: 0 10%;
}

.hero h1 { font-size: clamp(2rem, 5vw, 4rem); font-weight: 700; margin-bottom: 20px; }

.btn-main {
    background: var(--accent-blue);
    color: white;
    padding: 18px 45px;
    border-radius: 10px;
    text-decoration: none;
    font-weight: bold;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 10px 20px rgba(59, 130, 246, 0.3);
}

/* --- SECCIONES --- */
section { padding: 80px 10%; }
.bg-light { background: var(--bg-light); }
.text-center { text-align: center; }

.about-container {
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); 
    gap: 60px; 
    align-items: center;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.floating-img {
    width: 100%;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    animation: float 5s ease-in-out infinite;
}

/* SERVICIOS */
.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }
.service-card { 
    background: white; padding: 40px; border-radius: 20px; text-align: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05); transition: 0.4s;
}
.accent-card { border-top: 4px solid var(--accent-blue); }
.service-card:hover { transform: translateY(-10px); }
.service-card i { font-size: 50px; color: var(--accent-blue); margin-bottom: 20px; display: block; }

/* MARCAS */
.brand-track {
    display: flex; gap: 50px; align-items: center; justify-content: center; flex-wrap: wrap; padding: 60px 0;
}
.brand-track img { height: 35px; filter: grayscale(100%); opacity: 0.5; transition: 0.3s; }
.brand-track img:hover { filter: grayscale(0%); opacity: 1; }

/* SOCIAL */
.social-links { display: flex; justify-content: center; gap: 30px; margin-top: 40px; }
.social-links a { font-size: 35px; color: var(--primary-blue); transition: 0.3s; }
.social-links a:hover { color: var(--accent-blue); transform: translateY(-5px); }

footer { background: var(--primary-blue); color: white; padding: 40px; text-align: center; }