/* Estilos para el listado alfabético */
.navegacion-alfabeto {
    background: #f8f9fa;
    padding: 25px;
    margin-bottom: 30px;
    border-radius: 10px;
    text-align: center;
    border: 1px solid #e9ecef;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.navegacion-alfabeto h3 {
    margin-bottom: 20px;
    color: #2c3e50;
    font-size: 1.4em;
    font-weight: 600;
}

.letras-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    max-width: 800px;
    margin: 0 auto;
}

.letra {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 16px;
    text-decoration: none;
    font-weight: bold;
    border-radius: 6px;
    transition: all 0.3s ease;
    min-width: 45px;
    text-align: center;
    font-size: 1.1em;
    border: 2px solid transparent;
}

.letra-activa {
    background: #3498db;
    color: white;
    border-color: #2980b9;
}

.letra-activa:hover {
    background: #2980b9;
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.letra-inactiva {
    background: #ecf0f1;
    color: #95a5a6;
    cursor: not-allowed;
    border-color: #bdc3c7;
}

.letra.activa {
    background: #e74c3c;
    border-color: #c0392b;
}

.listado-completo {
    margin-top: 20px;
}

.grupo-letra {
    margin-bottom: 40px;
    padding: 25px;
    border-left: 5px solid #3498db;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.grupo-letra:hover {
    transform: translateX(5px);
}

.letra-titulo {
    font-size: 2.2em;
    color: #2c3e50;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 3px solid #3498db;
    font-weight: 700;
}

.lista-posts {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 12px;
}

.lista-posts li {
    padding: 12px 15px;
    border-bottom: 1px solid #ecf0f1;
    transition: background-color 0.3s ease;
    border-radius: 4px;
}

.lista-posts li:hover {
    background-color: #f8f9fa;
}

.lista-posts li:last-child {
    border-bottom: none;
}

.lista-posts a {
    text-decoration: none;
    color: #34495e;
    font-size: 1.1em;
    transition: all 0.3s ease;
    display: block;
    font-weight: 500;
}

.lista-posts a:hover {
    color: #3498db;
    transform: translateX(5px);
}

/* Efecto de scroll suave */
html {
    scroll-behavior: smooth;
}

/* Responsive */
@media (max-width: 768px) {
    .navegacion-alfabeto {
        padding: 15px;
    }
    
    .letras-container {
        gap: 5px;
    }
    
    .letra {
        padding: 10px 12px;
        min-width: 40px;
        font-size: 1em;
    }
    
    .lista-posts {
        grid-template-columns: 1fr;
    }
    
    .grupo-letra {
        padding: 20px;
        margin-bottom: 30px;
    }
    
    .letra-titulo {
        font-size: 1.8em;
    }
}

@media (max-width: 480px) {
    .letra {
        padding: 8px 10px;
        min-width: 35px;
        font-size: 0.9em;
    }
    
    .navegacion-alfabeto h3 {
        font-size: 1.2em;
    }
    
    .grupo-letra {
        padding: 15px;
    }
}

/* Animación de carga */
.grupo-letra {
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Indicador de letra activa en scroll */
.letra-activa.activa {
    position: relative;
}

.letra-activa.activa::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 8px;
    height: 8px;
    background: #e74c3c;
    border-radius: 50%;
}