/* Estilos para la página de selección de métodos */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
    line-height: 1.6;
}

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

.header {
    text-align: center;
    margin-bottom: 50px;
    color: white;
}

.academic-info {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 15px;
    padding: 20px;
    margin-top: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.academic-info h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: #fff;
    font-weight: 600;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
}

.academic-info .author {
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: #f0f0f0;
    font-weight: 500;
}

.academic-info .course {
    font-size: 1rem;
    color: #e0e0e0;
    font-weight: 400;
    margin-bottom: 0;
}

.header h1 {
    font-size: 3rem;
    margin-bottom: 15px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    background: linear-gradient(45deg, #fff, #f0f0f0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header p {
    font-size: 1.3rem;
    opacity: 0.95;
    font-weight: 300;
}

.selection-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.method-card {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    cursor: pointer;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.method-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.method-card:hover::before {
    transform: scaleX(1);
}

.method-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
}

.card-icon {
    font-size: 4rem;
    margin-bottom: 20px;
    display: block;
}

.method-card h2 {
    color: #667eea;
    margin-bottom: 15px;
    font-size: 1.8rem;
    font-weight: 600;
}

.method-card p {
    color: #666;
    margin-bottom: 25px;
    line-height: 1.6;
    font-size: 1.1rem;
}

.card-features {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 30px;
}

.feature {
    background: #f8f9fa;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    color: #555;
    border: 1px solid #e1e5e9;
    transition: all 0.3s ease;
}

.method-card:hover .feature {
    background: #667eea;
    color: white;
    border-color: #667eea;
    transform: translateX(5px);
}

.btn-select {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 25px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
    max-width: 200px;
}

.btn-select:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.info-section {
    background: white;
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.info-section h3 {
    color: #667eea;
    margin-bottom: 15px;
    font-size: 1.5rem;
}

.info-section p {
    color: #666;
    line-height: 1.6;
    font-size: 1.1rem;
}

/* Efectos de animación adicionales */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.method-card {
    animation: fadeInUp 0.6s ease forwards;
}

.method-card:nth-child(2) {
    animation-delay: 0.2s;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .header h1 {
        font-size: 2.5rem;
    }
    
    .header p {
        font-size: 1.1rem;
    }
    
    .selection-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .method-card {
        padding: 30px 20px;
    }
    
    .card-icon {
        font-size: 3rem;
    }
    
    .method-card h2 {
        font-size: 1.6rem;
    }
    
    .info-section {
        padding: 25px 20px;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 2rem;
    }
    
    .header p {
        font-size: 1rem;
    }
    
    .method-card {
        padding: 25px 15px;
    }
    
    .card-icon {
        font-size: 2.5rem;
    }
    
    .method-card h2 {
        font-size: 1.4rem;
    }
    
    .method-card p {
        font-size: 1rem;
    }
    
    .btn-select {
        padding: 12px 25px;
        font-size: 1rem;
    }
}