:root {
    --primary: #003366;
    --secondary: #d4af37;
    --light: #f4f4f4;
    --dark: #333;
    --white: #fff;
    --gray: #666;
}

* { box-sizing: border-box; }
body { margin: 0; font-family: 'Segoe UI', sans-serif; line-height: 1.6; color: var(--dark); background-color: var(--light); }
img { max-width: 100%; height: auto; }
a { text-decoration: none; color: inherit; }
.container { width: 90%; max-width: 1200px; margin: 0 auto; padding: 0 15px; }

/* Accesibilidad: Skip Link */
.skip-link { position: absolute; top: -40px; left: 0; background: var(--secondary); color: var(--primary); padding: 8px; z-index: 2000; transition: top 0.3s; font-weight: bold; }
.skip-link:focus { top: 0; }

/* Accesibilidad: Foco Visible */
*:focus-visible { outline: 3px solid var(--secondary); outline-offset: 2px; }

/* Header */
.main-header { background: var(--white); box-shadow: 0 2px 10px rgba(0,0,0,0.1); position: sticky; top: 0; z-index: 1000; }
.header-content { display: flex; justify-content: space-between; align-items: center; padding: 10px 0; }
.logo img { max-height: 70px; }

.header-right { display: flex; align-items: center; gap: 15px; }
.search-box form { display: flex; border: 1px solid #ddd; border-radius: 20px; overflow: hidden; }
.search-box input { border: none; padding: 5px 10px; }
.search-box input:focus { outline: none; background: #f0f8ff; } /* Indicador visual alternativo */
.search-box button { background: var(--primary); color: var(--white); border: none; padding: 5px 10px; cursor: pointer; }
.search-box button:focus { outline: 2px solid var(--secondary); outline-offset: -2px; }
.menu-toggle { display: none; background: none; border: none; font-size: 1.5rem; cursor: pointer; color: var(--primary); }

/* Navigation */
.main-nav { background: var(--primary); color: var(--white); }
.main-nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; justify-content: center; }
.main-nav li a { display: block; padding: 15px 20px; color: var(--white); font-weight: 500; transition: background 0.3s; font-size: 0.9rem; }
.main-nav li a:hover, .main-nav li a:focus { background: var(--white); color: var(--primary); text-decoration: underline; } /* Alto contraste */

/* Slider */
.hero-slider { position: relative; overflow: hidden; max-height: 500px; }
.slide { display: none; position: relative; }
.slide.active { display: block; animation: fade 1s; }
.slide img { width: 100%; object-fit: cover; height: 500px; }
.slide-content { position: absolute; bottom: 20%; left: 10%; background: rgba(0, 51, 102, 0.8); color: white; padding: 20px; max-width: 500px; border-left: 5px solid var(--secondary); }
.slide-content h2 { margin: 0 0 10px; font-size: 2rem; }

/* Sections */
.section { padding: 60px 0; }
.section-title { text-align: center; margin-bottom: 40px; color: var(--primary); font-size: 2rem; position: relative; }
.section-title::after { content: ''; display: block; width: 60px; height: 3px; background: var(--secondary); margin: 10px auto 0; }

/* Responsable */
.responsable-grid { display: grid; grid-template-columns: 1fr 2fr; gap: 40px; align-items: center; background: var(--white); padding: 40px; border-radius: 8px; box-shadow: 0 4px 15px rgba(0,0,0,0.05); }
.resp-img img { border-radius: 8px; box-shadow: 0 4px 10px rgba(0,0,0,0.2); }
.btn { display: inline-block; background: var(--primary); color: var(--white); padding: 10px 20px; border-radius: 4px; margin-top: 15px; transition: background 0.3s; }
.btn:hover { background: #002244; }

/* Accesos Rápidos (Cards) */
.cards-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; }
.card-link { background: var(--white); padding: 30px; text-align: center; border-radius: 8px; transition: transform 0.3s, box-shadow 0.3s; border-bottom: 4px solid var(--secondary); display: block; }
.card-link:hover { transform: translateY(-5px); box-shadow: 0 10px 20px rgba(0,0,0,0.1); }
.card-link i { font-size: 3rem; color: var(--primary); margin-bottom: 15px; }
.card-link h3 { margin: 0; color: var(--dark); }

/* Footer */
.main-footer { background: var(--primary); color: var(--white); padding-top: 60px; position: relative; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 40px; padding-bottom: 40px; }
.footer-col h3 { color: var(--secondary); margin-bottom: 20px; border-bottom: 1px solid rgba(255,255,255,0.1); padding-bottom: 10px; }
.footer-col ul { list-style: none; padding: 0; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a:hover { color: var(--white); text-decoration: underline; padding-left: 5px; transition: 0.3s; } /* Corrección contraste */
.footer-bottom { background: #002244; padding: 20px 0; text-align: center; font-size: 0.9rem; }
#back-to-top { position: fixed; bottom: 20px; right: 20px; background: var(--secondary); color: var(--primary); border: none; width: 40px; height: 40px; border-radius: 50%; cursor: pointer; display: none; z-index: 999; }

/* Responsive */
@media (max-width: 768px) {
    .menu-toggle { display: block; }
    .main-nav { display: none; }
    .main-nav.active { display: block; }
    .main-nav ul { flex-direction: column; }
    .main-nav li a { border-bottom: 1px solid rgba(255,255,255,0.1); }
    .responsable-grid { grid-template-columns: 1fr; text-align: center; }
    .slide img { height: 300px; }
    .slide-content { left: 5%; right: 5%; bottom: 10%; }
}

@keyframes fade { from { opacity: .4 } to { opacity: 1 } }

/* Document Tree */
.doc-tree { list-style: none; padding-left: 0; }
.doc-tree li { margin-bottom: 15px; }
.cat-title { font-weight: bold; color: var(--primary); font-size: 1.1rem; margin-bottom: 5px; border-bottom: 1px solid #eee; padding-bottom: 5px; }
.doc-files { list-style: none; padding-left: 20px; }
.doc-files li { margin-bottom: 8px; }
.doc-files a { color: var(--dark); display: flex; align-items: center; gap: 8px; transition: color 0.2s; }
.doc-files a:hover { color: var(--primary); text-decoration: underline; } /* Corrección contraste */
.doc-files i { color: #dc3545; } /* Color rojo PDF */