header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    transition: 0.3s ease;
}

header.scrolled {
    background: rgba(46, 74, 43, 0.95); /* Verde Olivo Transparente */
    backdrop-filter: blur(5px);
    padding: 10px 0;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    color: var(--blanco);
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 2px;
}

.nav-links { display: flex; list-style: none; }

.nav-links li a {
    color: var(--blanco);
    text-decoration: none;
    margin-left: 30px;
    font-size: 0.9rem;
    font-weight: 500;
    text-transform: uppercase;
    transition: color 0.3s;
}

.nav-links li a:hover { color: var(--amarillo-vivo); }

.menu-toggle { display: none; color: white; font-size: 1.5rem; cursor: pointer; }

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--verde-olivo);
        flex-direction: column;
        text-align: center;
        padding: 20px 0;
    }
    .nav-links.active { display: flex; }
    .nav-links li { margin: 15px 0; }
    .menu-toggle { display: block; }
}