/* ==========================================================================
   Variables de Identidad Institucional y Reset
   ========================================================================== */
:root {
    --color-primary: #0d5c3a;     /* Verde Oficial UT */
    --color-secondary: #d4af37;   /* Oro Oficial UT */
    --color-dark: #1a202c;        /* Texto principal */
    --color-light: #f7fafc;       /* Fondos claros */
    --color-white: #ffffff;
    --color-muted: #718096;
    --font-sans: 'Helvetica Neue', Arial, sans-serif;
    --header-height: 70px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-dark);
    background-color: var(--color-white);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ==========================================================================
   Header y Navegación
   ========================================================================== */
.site-header {
    background-color: var(--color-primary);
    border-bottom: 4px solid var(--color-secondary);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.header-container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    height: var(--header-height);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-area a {
    text-decoration: none;
    color: var(--color-white);
    display: flex;
    flex-direction: column;
}

.logo-txt {
    font-size: 1.4rem;
    letter-spacing: 1px;
}

.logo-txt strong {
    color: var(--color-secondary);
}

.logo-sub {
    font-size: 0.75rem;
    opacity: 0.8;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-white);
    font-size: 1.5rem;
    cursor: pointer;
}

.main-navigation ul {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 20px;
}

.main-navigation a {
    color: var(--color-white);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.3s ease;
}

.main-navigation a:hover {
    color: var(--color-secondary);
}

.btn-portal {
    background-color: var(--color-secondary);
    color: var(--color-dark) !important;
    padding: 6px 14px;
    border-radius: 4px;
    font-weight: bold !important;
}

.btn-portal:hover {
    background-color: var(--color-white);
    color: var(--color-primary) !important;
}

/* ==========================================================================
   Contenido Principal
   ========================================================================== */
.main-content {
    flex: 1;
    padding: 40px 0;
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
    background-color: #1a202c;
    color: var(--color-white);
    margin-top: auto;
}

.footer-top {
    padding: 40px 0;
    border-bottom: 1px solid #2d3748;
}

.footer-container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.footer-info h3, .footer-links h4, .footer-contact h4 {
    color: var(--color-secondary);
    margin-bottom: 15px;
}

.footer-links ul {
    list-style: none;
}

.footer-links a, .footer-contact a {
    color: #cbd5e0;
    text-decoration: none;
    transition: color 0.2s;
}

.footer-links a:hover, .footer-contact a:hover {
    color: var(--color-secondary);
}

.footer-bottom {
    padding: 20px 0;
    font-size: 0.85rem;
    color: var(--color-muted);
}

.text-center {
    text-align: center;
}

.legal-text {
    margin-top: 5px;
    font-size: 0.75rem;
}

/* ==========================================================================
   Media Queries (Responsivo)
   ========================================================================== */
@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    .main-navigation {
        display: none;
        position: absolute;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background-color: var(--color-primary);
        border-bottom: 4px solid var(--color-secondary);
    }

    .main-navigation.active {
        display: block;
    }

    .main-navigation ul {
        flex-direction: column;
        padding: 20px;
        gap: 15px;
        align-items: flex-start;
    }
    
    .btn-portal {
        width: 100%;
        text-align: center;
    }
}

/* Asegurar comportamiento responsivo del logo */
.nav-logo-link img {
    transition: transform 0.2s ease;
}

.nav-logo-link img:hover {
    transform: scale(1.02); /* Un sutil efecto visual al pasar el cursor */
}

/* En pantallas muy pequeñas, si el texto de al lado estorba, puedes ocultarlo o reducirlo */
@media (max-width: 480px) {
    .nav-logo-link div {
        display: none; /* Deja solo el logo SVG para optimizar espacio */
    }
    .nav-logo-link img {
        height: 38px; /* Un tamaño un poco más compacto en celulares */
    }
}