:root {
            --primary-color: #f8f9fa;
            --accent-color: #0d6efd;
            --success-color: #198754;
            --error-color: #dc3545;
        }
        
        body {
            font-family: 'Montserrat', sans-serif;
            background-color: #000;
            color: var(--primary-color);
            position: relative;
            min-height: 100vh;
        }
        
        .navbar {
            background-color: rgba(0, 0, 0, 0.9);
            backdrop-filter: blur(10px);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
        }
        
        .hero-section {
            background-image: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), 
                              url('https://cdn.pixabay.com/photo/2016/11/18/18/29/crowd-1836342_1280.jpg');
            background-size: cover;
            background-position: center;
            height: 100vh;
            display: flex;
            align-items: center;
            text-align: center;
        }
        
        .hero-content h1 {
            font-size: 4rem;
            font-weight: 700;
            margin-bottom: 1rem;
            text-shadow: 0 2px 5px rgba(0, 0, 0, 0.5);
        }
        
        .hero-content p {
            font-size: 1.5rem;
            margin-bottom: 2rem;
            text-shadow: 0 2px 5px rgba(0, 0, 0, 0.5);
        }
        
        .section-title {
            position: relative;
            margin-bottom: 3rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 2px;
        }
        
        .section-title::after {
            content: '';
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            bottom: -15px;
            width: 50px;
            height: 3px;
            background-color: var(--accent-color);
        }
        
        .propuesta-card {
            background-color: rgba(30, 30, 30, 0.7);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 10px;
            padding: 2rem;
            transition: transform 0.3s, box-shadow 0.3s;
            height: 100%;
        }
        
        .propuesta-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
        }
        
        .propuesta-icon {
            font-size: 3rem;
            margin-bottom: 1.5rem;
            color: var(--accent-color);
        }
        
        .social-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background-color: rgba(30, 30, 30, 0.7);
            color: var(--primary-color);
            font-size: 1.5rem;
            margin: 0 10px;
            transition: all 0.3s;
        }
        
        .social-icon:hover {
            background-color: var(--accent-color);
            transform: translateY(-5px);
        }
        
        .form-control, .btn {
            border-radius: 0;
            padding: 12px 20px;
        }
        
        .form-control {
            background-color: rgba(30, 30, 30, 0.7);
            border: 1px solid rgba(255, 255, 255, 0.1);
            color: var(--primary-color);
        }
        
        .form-control:focus {
            background-color: rgba(50, 50, 50, 0.7);
            color: var(--primary-color);
            border-color: var(--accent-color);
            box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
        }
        
        .btn-primary {
            background-color: var(--accent-color);
            border: none;
            text-transform: uppercase;
            font-weight: 600;
            letter-spacing: 1px;
            transition: all 0.3s;
        }
        
        .btn-primary:hover {
            background-color: #0b5ed7;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(13, 110, 253, 0.3);
        }
        
        .footer {
            background-color: rgba(10, 10, 10, 0.9);
            padding: 2rem 0;
            margin-top: 5rem;
        }
        
        .alert-custom {
            position: fixed;
            top: 20px;
            right: 20px;
            z-index: 1050;
            min-width: 300px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
        }
        
        @media (max-width: 768px) {
            .hero-content h1 {
                font-size: 2.5rem;
            }
            
            .hero-content p {
                font-size: 1.2rem;
            }
            
            .social-icon {
                width: 50px;
                height: 50px;
                font-size: 1.3rem;
                margin: 0 5px;
            }
        }