/* CSS Crítico para evitar FOUC */
        :root {
            --primary-color: #2c5aa0;
            --primary-dark: #1e3d6f;
            --secondary-color: #34495e;
            --accent-color: #3498db;
            --success-color: #27ae60;
            --warning-color: #f39c12;
            --danger-color: #e74c3c;
            --light-bg: #f8f9fa;
            --dark-bg: #2c3e50;
            --text-color: #2c3e50;
            --text-muted: #6c757d;
            --border-color: #dee2e6;
            --shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.15);
            --transition: all 0.3s ease;
            --border-radius: 8px;
            --text-dark:#2c3e50;
            --text-light:#6c757d;
            --border-radius-lg:16px;
        }
        
        * {
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Titillium Web', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: #ffffff;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        
        /* Loading spinner */
        .page-loader {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            display: flex;
            justify-content: center;
            align-items: center;
            z-index: 9999;
            transition: opacity 0.5s ease-out, visibility 0.5s ease-out;
        }
        body.home .main-content{
    min-height: calc(100vh - 250px);   /* menos alto ⇒ menos hueco */
}
        .page-loader.hidden {
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
        }
        
        .spinner {
            width: 60px;
            height: 60px;
            border: 4px solid rgba(255, 255, 255, 0.3);
            border-top: 4px solid #ffffff;
            border-radius: 50%;
            animation: spin 1s linear infinite;
            box-shadow: 0 0 20px rgba(255, 255, 255, 0.2);
        }
        
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        
        /* Skip to main content para accesibilidad */
        .skip-link {
            position: absolute;
            top: -40px;
            left: 6px;
            background: var(--primary-color);
            color: white;
            padding: 8px 16px;
            text-decoration: none;
            border-radius: 0 0 var(--border-radius) var(--border-radius);
            z-index: 10000;
            transform: translateY(-100%);
            transition: transform 0.3s ease;
            font-weight: 500;
        }
        
        .skip-link:focus {
            transform: translateY(0%);
            color: white;
        }
        
        /* Navbar mejorado */
        .navbar {
            backdrop-filter: blur(20px);
            background-color: rgba(248, 249, 250, 0.95) !important;
            box-shadow: var(--shadow);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
            padding: 0.75rem 0;
        }
        
        .navbar.scrolled {
            background-color: rgba(255, 255, 255, 0.98) !important;
            box-shadow: var(--shadow-lg);
        }
        
        .navbar-brand {
            font-weight: 700;
            color: var(--primary-color) !important;
            font-size: 1.5rem;
            text-decoration: none;
            transition: var(--transition);
            letter-spacing: -0.5px;
        }
        
        .navbar-brand:hover {
            color: var(--primary-dark) !important;
            transform: translateY(-1px);
        }
        
        .nav-link {
            font-weight: 500;
            color: var(--text-color) !important;
            padding: 0.5rem 1rem !important;
            margin: 0 0.25rem;
            border-radius: var(--border-radius);
            transition: var(--transition);
            position: relative;
        }
        
        .nav-link:hover,
        .nav-link.active {
            color: var(--primary-color) !important;
            background-color: rgba(44, 90, 160, 0.1);
            transform: translateY(-1px);
        }
        
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            width: 0;
            height: 2px;
            background: var(--primary-color);
            transition: var(--transition);
            transform: translateX(-50%);
        }
        
        .nav-link:hover::after,
        .nav-link.active::after {
            width: 80%;
        }
        
        
        
        /* Logo container mejorado */
        .header-icon-one {
            text-align: center;
            padding: 2rem 0;
            animation: fadeInUp 1s ease-out;
        }
        
        .header-icon-one img {
            max-width: 100%;
            height: auto;
            filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.1));
            transition: var(--transition);
        }
        
        .header-icon-one img:hover {
            transform: scale(1.02);
            filter: drop-shadow(0 15px 30px rgba(0, 0, 0, 0.15));
        }
        
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        /* Footer mejorado */
        .footer {
            background: linear-gradient(135deg, var(--dark-bg) 0%, #34495e 100%);
            color: #ffffff;
            padding: 3rem 0 1rem;
            margin-top: auto;
            position: relative;
            overflow: hidden;
        }
        
        .footer::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
        }
        
        .footer h5 {
            color: #ffffff;
            font-weight: 600;
            margin-bottom: 1.5rem;
            position: relative;
        }
        
        .footer h5::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 2px;
            background: var(--accent-color);
            border-radius: 2px;
        }
        
        /* Social icons mejorados */
        .social-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 50px;
            height: 50px;
            font-size: 1.25rem;
            margin: 0 0.75rem;
            color: #ffffff;
            background: rgba(255, 255, 255, 0.1);
            border: 2px solid rgba(255, 255, 255, 0.2);
            border-radius: 50%;
            text-decoration: none;
            transition: var(--transition);
            backdrop-filter: blur(10px);
            position: relative;
            overflow: hidden;
        }
        
        .social-icon::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            transition: left 0.5s ease;
        }
        
        .social-icon:hover {
            color: #ffffff;
            background: var(--accent-color);
            border-color: var(--accent-color);
            transform: translateY(-3px) scale(1.1);
            box-shadow: 0 10px 20px rgba(52, 152, 219, 0.3);
        }
        
        .social-icon:hover::before {
            left: 100%;
        }
        
        .social-icon:focus {
            outline: 2px solid var(--accent-color);
            outline-offset: 2px;
        }
        
        /* Copyright styling */
        .text-muted {
            color: rgba(255, 255, 255, 0.7) !important;
            font-size: 0.9rem;
        }
        
        /* Back to top button */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--primary-color);
            color: white;
            border: none;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            cursor: pointer;
            transition: var(--transition);
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            box-shadow: var(--shadow-lg);
        }
        
        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        
        .back-to-top:hover {
            background: var(--primary-dark);
            transform: translateY(-3px);
            box-shadow: 0 15px 35px rgba(44, 90, 160, 0.4);
        }
        
        /* Responsive improvements */
        @media (max-width: 991.98px) {
            .navbar-nav {
                background: rgba(255, 255, 255, 0.95);
                backdrop-filter: blur(20px);
                border-radius: var(--border-radius);
                padding: 1rem;
                margin-top: 1rem;
                box-shadow: var(--shadow);
            }
            
            .nav-link {
                margin: 0.25rem 0;
            }
            
            .main-content {
                padding-top: 70px;
            }
        }
        
        @media (max-width: 576px) {
            .social-icon {
                width: 45px;
                height: 45px;
                margin: 0 0.5rem;
                font-size: 1.1rem;
            }
            
            .back-to-top {
                bottom: 20px;
                right: 20px;
                width: 45px;
                height: 45px;
            }
        }
        
        /* Accessibility improvements */
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
        }
        
        /* Focus styles for keyboard navigation */
        .nav-link:focus,
        .navbar-brand:focus {
            outline: 2px solid var(--primary-color);
            outline-offset: 2px;
        }