/* ==========================================================================
   CSS DO CLUBE DO LIVRO - TEMA INVEST A.I.
   ========================================================================== */

/* --- VARIÁVEIS GLOBAIS DO SITE --- */
:root {
    --color-bg-primary: #1a1f36;
    --color-bg-footer: #1f273e;
    --color-accent: #00ffcc;
    --color-accent-dark: #00e6b8;
    --color-text-light: #ffffff;
    --color-text-medium: #d1d9e6;
    --color-text-dark: #a9b3c1;
    --color-card: #2a324d;
    --color-card-hover: #3a435a;
    --font-primary: 'Poppins', sans-serif;
    --font-headings: 'Montserrat', sans-serif;
    --border-radius: 12px;
}

/* --- ESTILOS GERAIS DA PÁGINA --- */
body {
    font-family: var(--font-primary);
    line-height: 1.7;
    color: var(--color-text-medium);
    background-color: var(--color-bg-primary);
    font-size: 16px;
    margin: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.highlight {
    color: var(--color-accent);
}

.text-center {
    text-align: center;
}

/* --- CABEÇALHO DA PÁGINA --- */
.page-header {
    padding: 4rem 0;
    background-color: var(--color-bg-footer);
    border-bottom: 1px solid var(--color-card);
}

.page-header h1 {
    font-family: var(--font-headings);
    font-size: 3rem;
    color: var(--color-text-light);
    margin-bottom: 1rem;
}

.section-description {
    max-width: 800px;
    margin: 0 auto;
    color: var(--color-text-dark);
    font-size: 1.1rem;
}

main {
    padding: 4rem 0;
}

/* --- GRADE DE LIVROS --- */
.book-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 2rem;
}

.book-card {
    background-color: var(--color-card);
    border-radius: var(--border-radius);
    cursor: pointer;
    overflow: hidden;
    border: 1px solid transparent;
    border-top: 4px solid var(--color-accent);
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    display: flex;
    flex-direction: column;
}

.book-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.25);
    border-color: rgba(0, 255, 204, 0.3);
}

.book-card img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    filter: saturate(0.9);
    transition: filter 0.3s ease, transform 0.3s ease;
}

.book-card:hover img {
    filter: saturate(1.1);
    transform: scale(1.03);
}

.book-card-title {
    font-family: var(--font-headings);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-text-light);
    padding: 1.25rem;
    margin: 0;
    text-align: center;
    flex-grow: 1;
    background-color: var(--color-card);
}

/* --- MODAL DE DETALHES --- */
#book-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(10, 15, 30, 0.85);
    backdrop-filter: blur(10px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 1;
    transition: opacity 0.3s ease;
}

#book-modal-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

#book-modal {
    background-color: var(--color-bg-footer);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-card);
    width: 90%;
    max-width: 900px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    transform: scale(0.95);
    transition: transform 0.3s ease;
}

#book-modal-overlay:not(.hidden) #book-modal {
    transform: scale(1);
}

.modal-content-wrapper {
    padding: 2.5rem;
}

.close-modal-btn {
    position: absolute;
    top: 15px;
    right: 20px;
    background: none;
    border: none;
    font-size: 2.5rem;
    font-weight: 300;
    color: var(--color-text-dark);
    cursor: pointer;
    transition: color 0.2s, transform 0.2s;
}

.close-modal-btn:hover {
    color: var(--color-accent);
    transform: rotate(90deg);
}

.modal-content {
    display: flex;
    gap: 2.5rem;
    margin-bottom: 2.5rem;
    padding-bottom: 2.5rem;
    border-bottom: 1px solid var(--color-card);
}

.modal-book-cover {
    width: 220px;
    height: auto;
    object-fit: contain;
    border-radius: 8px;
    flex-shrink: 0;
    box-shadow: 0 10px 25px rgba(0,0,0,0.3);
}

.modal-book-details h2 {
    font-family: var(--font-headings);
    margin-top: 0;
    font-size: 2rem;
    color: var(--color-accent);
}

.modal-book-details p {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-text-dark);
}

/* --- SEÇÃO DE COMENTÁRIOS --- */
.comments-section h3 {
    font-family: var(--font-headings);
    font-size: 1.5rem;
    color: var(--color-text-light);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

#comments-list .comment {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background-color: var(--color-card);
    border-radius: 8px;
    border-left: 3px solid var(--color-accent);
}

.comment .avatar {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background-color: var(--color-accent);
    color: var(--color-bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.comment-content .user-name {
    font-weight: 600;
    color: var(--color-text-light);
    margin-bottom: 0.25rem;
}

.comment-content p {
    margin: 0;
    color: var(--color-text-dark);
}

#comment-form {
    margin-top: 2rem;
    background-color: var(--color-card);
    padding: 1.5rem;
    border-radius: var(--border-radius);
}

#comment-form h4 {
    font-family: var(--font-headings);
    color: var(--color-text-light);
    margin-top: 0;
    margin-bottom: 1rem;
}

#comment-form textarea {
    width: 100%;
    min-height: 120px;
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid var(--color-card-hover);
    background-color: var(--color-bg-primary);
    color: var(--color-text-medium);
    font-family: var(--font-primary);
    font-size: 1rem;
    resize: vertical;
    margin-bottom: 1rem;
    transition: border-color 0.3s, box-shadow 0.3s;
}

#comment-form textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(0, 255, 204, 0.2);
}

.cta-button {
    display: inline-block;
    background-color: var(--color-accent);
    color: var(--color-bg-primary);
    padding: 0.8rem 1.5rem;
    border-radius: 30px;
    font-weight: 600;
    text-align: center;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.13s cubic-bezier(0.4,0,0.2,1);
}

.cta-button:hover {
    transform: translateY(-3px);
    background-color: var(--color-accent-dark);
    box-shadow: 0 8px 25px rgba(0, 255, 204, 0.3);
}

/* --- RESPONSIVIDADE --- */
@media (max-width: 768px) {
    .page-header h1 { font-size: 2.2rem; }
    main { padding: 2.5rem 0; }

    .modal-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .modal-book-cover {
        width: 180px;
    }
    
    .modal-content-wrapper {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .book-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 1.5rem;
    }

    .book-card img {
        height: 220px;
    }
}