/* Reset y estilos base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    color: white;
    padding: 2rem 0;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
    font-weight: 300;
}

/* Main content */
.main {
    padding: 3rem 0;
    flex: 1;
}

.intro {
    text-align: center;
    margin-bottom: 3rem;
}

.intro p {
    font-size: 1.1rem;
    color: #555;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

/* Modules grid */
.modules-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.module-card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
    border: 2px solid transparent;
}

.module-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    border-color: #10b981;
}

.module-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.module-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: #1e3a8a;
    margin-bottom: 0.5rem;
}

.module-description {
    color: #666;
    margin-bottom: 1.5rem;
    line-height: 1.5;
}

.module-btn {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.module-btn:hover {
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
    transform: scale(1.05);
}

/* Footer */
.footer {
    background: #1e3a8a;
    color: white;
    text-align: center;
    padding: 1.5rem 0;
    margin-top: auto;
}

.footer p {
    opacity: 0.9;
}

/* Responsive design */
@media (max-width: 768px) {
    .title {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .modules-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .module-card {
        padding: 1.5rem;
    }
    
    .main {
        padding: 2rem 0;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .title {
        font-size: 1.8rem;
    }
    
    .module-icon {
        font-size: 2.5rem;
    }
    
    .module-title {
        font-size: 1.2rem;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.module-card {
    animation: fadeIn 0.6s ease-out;
}

.module-card:nth-child(1) { animation-delay: 0.1s; }
.module-card:nth-child(2) { animation-delay: 0.2s; }
.module-card:nth-child(3) { animation-delay: 0.3s; }
.module-card:nth-child(4) { animation-delay: 0.4s; }
.module-card:nth-child(5) { animation-delay: 0.5s; }
.module-card:nth-child(6) { animation-delay: 0.6s; }
.module-card:nth-child(7) { animation-delay: 0.7s; }
.module-card:nth-child(8) { animation-delay: 0.8s; }
.module-card:nth-child(9) { animation-delay: 0.9s; }
.module-card:nth-child(10) { animation-delay: 1.0s; }