:root {
    --blue: #004a99;
    --dark: #1a1a1a;
    --white: #ffffff;
}

body { margin: 0; font-family: 'Arial', sans-serif; line-height: 1.6; }

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--dark);
    color: white;
    padding: 1rem 5%;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-links { display: flex; list-style: none; }
.nav-links li { margin-left: 20px; }
.nav-links a { color: white; text-decoration: none; font-weight: bold; }

/* Hero Section */
.hero {
    height: 80vh;
    background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), url('avion_fondo.jpg');
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
}

.btn-main {
    background: var(--blue);
    color: white;
    padding: 12px 30px;
    text-decoration: none;
    border-radius: 5px;
    display: inline-block;
    margin-top: 20px;
}

/* Responsividad */
@media (max-width: 768px) {
    .navbar { flex-direction: column; }
    .nav-links { margin-top: 15px; padding: 0; flex-direction: column; text-align: center; }
    .nav-links li { margin: 10px 0; }
}