/* Configuraciones Globales */
html { scroll-behavior: smooth; }
* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Helvetica', Arial, sans-serif; }

/* Navegación Principal */
.navbar-container {
    width: 100%; background: #fff; display: flex;
    justify-content: space-between; align-items: center;
    padding: 10px 5%; min-height: 120px; border-bottom: 1px solid #eee;
    position: relative;
}
.main-logo { width: 250px; height: auto; }
.nav-menu { display: flex; list-style: none; gap: 15px; }
.nav-menu li a { text-decoration: none; color: #333; font-weight: 700; font-size: 0.85rem; text-transform: uppercase; padding: 10px 15px; transition: 0.3s; }
.nav-menu li a:hover, .nav-menu li a.active { color: #0e3779; box-shadow: inset 0 -2px 0 #0e3779; }

/* --- CAMBIO DE COLOR: Aula Virtual (Antes verde, ahora azul) --- */
.aula-header, .aula-virtual-banner { 
    background-color: #0e3779 !important; 
    color: white;
    padding: 40px 20px;
    text-align: center;
}

/* Dropdowns */
.dropdown { position: relative; }
.dropdown-content { display: none; position: absolute; background: #fff; min-width: 160px; box-shadow: 0 8px 16px rgba(0,0,0,0.1); top: 100%; left: 0; z-index: 1000; }
.dropdown:hover .dropdown-content { display: block; }
.dropdown-content a { text-transform: none; font-weight: 400; display: block; width: 100%; padding: 10px 20px; }

/* Hero Principal */
.hero { 
    background: linear-gradient(rgba(14, 55, 121, 0.6), rgba(14, 55, 121, 0.6)), url('portada.jpg'); 
    background-size: cover; background-position: center; height: 75vh; 
    display: flex; align-items: center; justify-content: center; color: white; text-align: center; 
}
.hero h1 { font-size: 2.5rem; max-width: 800px; line-height: 1.2; }

/* Estilos del botón Hamburguesa (Invisible en PC) */
.menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
    z-index: 1100;
}
.bar {
    width: 25px; height: 3px;
    background-color: #0e3779;
    transition: 0.3s;
}

/* --- DISEÑO RESPONSIVO (Móviles) --- */
@media (max-width: 768px) {
    .menu-toggle { display: flex; } /* Aparece el botón */

    .nav-menu {
        display: flex !important;
        flex-direction: column;
        position: fixed;
        left: -100%; /* Escondido */
        top: 0;
        background-color: #ffffff;
        width: 80%;
        height: 100vh;
        padding-top: 100px;
        transition: 0.4s;
        box-shadow: 5px 0 15px rgba(0,0,0,0.2);
        z-index: 1000;
    }

    .nav-menu.active { left: 0; } /* Se muestra al hacer clic */

    .nav-menu li { width: 100%; text-align: center; margin: 15px 0; }
    
    .nav-menu li a {
        color: #0e3779 !important;
        font-size: 1.2rem;
    }

    /* Animación de la X */
    .menu-toggle.is-active .bar:nth-child(2) { opacity: 0; }
    .menu-toggle.is-active .bar:nth-child(1) { transform: translateY(8px) rotate(45deg); }
    .menu-toggle.is-active .bar:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

    .hero h1 { font-size: 1.6rem; padding: 0 10px; }
}

/* Footer */
footer { background: #111; color: #fff; padding: 25px; text-align: center; }