/* biblioteca.css – versão completa com estilos para cards, modal, botões, loading e responsividade */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #0D1117;
    --bg-secondary: #161B22;
    --bg-tertiary: #1F2933;
    --bg-sidebar: #111827;
    --text-primary: #E6EDF3;
    --text-secondary: #9CA3AF;
    --accent-blue: #2563EB;
    --accent-blue-hover: #1D4ED8;
    --accent-green: #22C55E;
    --accent-green-hover: #16A34A;
    --border: #2D3748;
    --success: #22C55E;
    --card-radius: 1rem;
    --transition: all 0.2s ease;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    font-size: 18px;
}

/* Esconde o conteúdo principal enquanto as traduções não carregam */
body.i18n-loading .container,
body.i18n-loading .library-header,
body.i18n-loading .search-bar,
body.i18n-loading .filter-bar,
body.i18n-loading .book-grid {
    visibility: hidden;
}
body.i18n-loading::before {
    content: "⏳ Carregando...";
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    font-size: 1.5rem;
    color: var(--text-secondary);
}

.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    padding: 1.2rem 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 2rem;
}

.logo {
    display: flex;
    flex-direction: column;
}

.logo-universidade {
    height: 100px;
    width: auto;
    max-width: 100%;
    display: block;
    object-fit: contain;
    margin-bottom: 0.5rem;
}

.logo p {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.stats {
    display: flex;
    gap: 1.2rem;
    background: var(--bg-secondary);
    padding: 0.5rem 1.2rem;
    border-radius: 2rem;
    align-items: center;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
}

.stat-item i {
    color: var(--accent-blue);
}

.btn-biblioteca {
    background: #2ea043;
    color: white;
    padding: 8px 16px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    display: inline-block;
    transition: 0.2s;
    font-size: 0.85rem;
}

.btn-biblioteca:hover {
    background: #238636;
    transform: scale(1.05);
}

.library-header {
    margin-bottom: 1rem;
}

.back-to-course {
    display: inline-block;
    margin-bottom: 0.5rem;
    color: var(--accent-blue);
    text-decoration: none;
    font-size: 0.9rem;
}

.back-to-course i {
    margin-right: 0.5rem;
}

.back-to-course:hover {
    text-decoration: underline;
}

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

.search-bar input {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 2rem;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.search-bar input:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.2);
}

.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    align-items: center;
}

.book-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
}

/* Cards da biblioteca */
.book-mini-card {
    background: var(--bg-tertiary);
    border-radius: 16px;
    overflow: hidden;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    cursor: pointer;
    text-align: center;
    padding: 1rem;
    border: 1px solid var(--border);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.book-mini-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.3);
    border-color: var(--accent-blue);
}

.mini-cover {
    width: 100%;
    aspect-ratio: 3 / 4;
    object-fit: cover;
    border-radius: 12px;
    margin-bottom: 0.75rem;
    background: var(--bg-primary);
}

.mini-title {
    font-size: 1rem;
    font-weight: 600;
    margin: 0.5rem 0 0.25rem;
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.mini-author,
.mini-year {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin: 0.2rem 0;
}

.mini-publisher {
    font-size: 0.7rem;
    color: var(--accent-green);
    margin: 0.2rem 0;
}

.mini-type-tag {
    font-size: 0.7rem;
    background: var(--bg-secondary);
    display: inline-block;
    padding: 0.2rem 0.5rem;
    border-radius: 20px;
    margin-top: 0.3rem;
    color: var(--accent-blue);
}

/* Botões de ação (modal) */
.modal-actions {
    display: flex;
    gap: 0.8rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.action-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    background: var(--accent-blue);
    color: white;
    padding: 0.4rem 0.8rem;
    border-radius: 2rem;
    font-size: 0.8rem;
    text-decoration: none;
    transition: all 0.2s ease;
    border: none;
    cursor: pointer;
}

.action-btn.download-btn {
    background: #2ea043;
}

.action-btn.repo-btn {
    background: #24292e;
}

.action-btn:hover {
    opacity: 0.85;
    transform: translateY(-1px);
}

.disabled-btn {
    opacity: 0.5;
    cursor: not-allowed;
    background: #6c757d;
}

/* Modal de detalhes */
.book-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
}

.modal-content {
    background: var(--bg-secondary);
    border-radius: 20px;
    max-width: 800px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    padding: 1.5rem;
}

.close-modal {
    position: absolute;
    top: 0.8rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 1.8rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: color 0.2s;
}

.close-modal:hover {
    color: var(--text-primary);
}

.modal-cover {
    width: 140px;
    height: 200px;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.4);
}

.modal-details {
    flex: 1;
    min-width: 200px;
}

.modal-details h2 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.modal-details p {
    font-size: 0.9rem;
    margin: 0.3rem 0;
    color: var(--text-secondary);
}

.modal-description {
    margin: 0.8rem 0;
    line-height: 1.5;
    color: var(--text-primary);
}

/* Loading skeleton */
.loading-skeleton {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
}

.spinner {
    width: 40px;
    height: 40px;
    margin: 0 auto 1rem;
    border: 3px solid var(--border);
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-text {
    font-size: 1rem;
    color: var(--text-secondary);
}

.empty-state, .error-state {
    text-align: center;
    padding: 3rem;
    font-size: 1.1rem;
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    border-radius: 16px;
}

.error-state {
    color: #f87171;
}

/* Responsividade */
@media (max-width: 768px) {
    .book-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 1rem;
    }
    .modal-content {
        padding: 1rem;
    }
    .modal-cover {
        width: 110px;
        height: 160px;
    }
    .modal-details h2 {
        font-size: 1.2rem;
    }
    .filter-bar {
        gap: 0.5rem;
    }
    .logo-universidade {
        height: 32px;
    }
    .stats {
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.8rem;
    }
}

@media (max-width: 600px) {
    .book-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 0.8rem;
    }
    .book-mini-card {
        padding: 0.5rem;
    }
    .mini-title {
        font-size: 0.8rem;
    }
    .mini-author, .mini-year {
        font-size: 0.7rem;
    }
    .mini-type-tag {
        font-size: 0.65rem;
    }
    .modal-content > div {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    .empty-state, .error-state {
        padding: 2rem;
        font-size: 1rem;
    }
}