/* Estilos específicos para a página de e-books */

.ebooks-section {
    padding: 8rem 0 4rem;
    min-height: 100vh;
    background: var(--bg-secondary);
}

.ebooks-section h1 {
    text-align: center;
    color: var(--primary-color);
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.ebooks-section .subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.2rem;
    margin-bottom: 3rem;
}

/* Filtros e Busca */
.ebooks-filter {
    margin-bottom: 3rem;
}

.search-box {
    position: relative;
    max-width: 600px;
    margin: 0 auto 2rem;
}

.search-box input {
    width: 100%;
    padding: 1rem 3rem 1rem 1.5rem;
    border: 2px solid var(--border-color);
    border-radius: 50px;
    font-size: 1.1rem;
    transition: all 0.3s ease;
}

.search-box input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(46, 125, 50, 0.1);
    outline: none;
}

.search-box i {
    position: absolute;
    right: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
    font-size: 1.2rem;
}

.filter-buttons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.filter-btn {
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--border-color);
    border-radius: 25px;
    background: var(--white);
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.filter-btn.active {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

/* Grid de E-books */
.ebooks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.ebook-card {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.ebook-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.15);
}

.ebook-image {
    position: relative;
    padding-top: 140%;
    overflow: hidden;
}

.ebook-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.ebook-content {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.ebook-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.ebook-category {
    color: var(--primary-color);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.ebook-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.ebook-price {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.ebook-actions {
    display: flex;
    gap: 1rem;
}

.ebook-actions .btn {
    flex: 1;
    padding: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

/* Botão Carregar Mais */
.load-more {
    text-align: center;
    margin-top: 3rem;
}

.load-more .btn {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
}

/* Responsividade */
@media (max-width: 768px) {
    .ebooks-section {
        padding: 6rem 0 3rem;
    }

    .ebooks-section h1 {
        font-size: 2rem;
    }

    .search-box {
        margin-bottom: 1.5rem;
    }

    .filter-buttons {
        gap: 0.75rem;
    }

    .filter-btn {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }

    .ebooks-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 1.5rem;
    }
}

@media (max-width: 480px) {
    .ebooks-section h1 {
        font-size: 1.8rem;
    }

    .ebooks-section .subtitle {
        font-size: 1rem;
    }

    .filter-buttons {
        flex-wrap: nowrap;
        overflow-x: auto;
        padding-bottom: 1rem;
        -webkit-overflow-scrolling: touch;
    }

    .filter-btn {
        white-space: nowrap;
    }

    .ebooks-grid {
        grid-template-columns: 1fr;
    }
}

/* Estados de Loading e Erro */
.loading-state,
.error-state {
    text-align: center;
    padding: 3rem;
    grid-column: 1 / -1;
}

.loading-state i,
.error-state i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.error-state {
    color: var(--error-color);
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.ebook-card {
    animation: fadeIn 0.5s ease-out;
}

/* Mensagens de estado */
.loading-message,
.empty-message,
.error-message {
    grid-column: 1 / -1;
    text-align: center;
    padding: 40px;
    border-radius: 8px;
    font-size: 1.1rem;
    margin: 20px 0;
}

.loading-message {
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    color: #495057;
    border: 2px dashed #dee2e6;
}

.empty-message {
    background: linear-gradient(135deg, #fff3cd, #ffeaa7);
    color: #856404;
    border: 2px dashed #ffc107;
}

.error-message {
    background: linear-gradient(135deg, #f8d7da, #f5c6cb);
    color: #721c24;
    border: 2px dashed #dc3545;
}