* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        :root {
            --primary-color: #8e0404;
            --secondary-color: #54bb7b;
            --accent-color: #e74c3c;
            --light-color: #ecf0f1;
            --dark-color: #1a252f;
            --gray-color: #7f8c8d;
        }

        body {
            background-color: #f5f7fa;
            color: #333;
            line-height: 1.6;
        }

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

        /* Header */
        header {
            background: var(--primary-color);
            color: white;
            padding: 20px 0;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }

        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .logo i {
            font-size: 2rem;
            color: var(--secondary-color);
        }

        .logo h1 {
            font-size: 1.8rem;
            font-weight: 700;
        }

        .search-bar {
            display: flex;
            width: 300px;
        }

        .search-bar input {
            flex: 1;
            padding: 12px 15px;
            border: none;
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
        }

        .search-bar button {
            background-color: white;
            color: black;
            border: none;
            padding: 0 20px;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            transition: background-color 0.3s;
        }

        .search-bar button:hover {
            background-color: var(--secondary-color);
        }

        /* Main Content */
        main {
            padding: 30px 0;
            min-height: calc(100vh - 180px);
        }

        /* Filtros */
        .filters {
            background-color: white;
            padding: 20px;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            margin-bottom: 30px;
        }

        .filter-section {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            align-items: center;
        }

        .filter-group {
            display: flex;
            flex-direction: column;
            min-width: 180px;
        }

        .filter-group label {
            font-weight: 600;
            margin-bottom: 5px;
            color: var(--primary-color);
            font-size: 0.9rem;
        }

        .filter-group select {
            padding: 10px;
            border: 1px solid #ddd;
            border-radius: 4px;
            background-color: white;
        }


        /* Grid de Livros */
        .books-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
        }

        .books-header h2 {
            color: var(--primary-color);
        }

        .books-count {
            color: var(--gray-color);
            font-size: 0.95rem;
        }

        .books-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
            gap: 25px;
        }

        .book-card {
            background-color: white;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            transition: transform 0.3s, box-shadow 0.3s;
            cursor: pointer;
        }

        .book-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 16px rgba(0, 0, 0, 0.12);
        }

        .book-cover {
            height: 280px;
            background-color: #eee;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            position: relative;
        }

        .book-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .book-placeholder {
            color: var(--gray-color);
            text-align: center;
            padding: 20px;
        }

        .book-placeholder i {
            font-size: 3rem;
            margin-bottom: 10px;
            opacity: 0.5;
        }

        .book-info {
            padding: 20px;
        }

        .book-title {
            font-weight: 700;
            font-size: 1.1rem;
            margin-bottom: 5px;
            color: var(--primary-color);
            height: 50px;
            overflow: hidden;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }

        .book-author {
            color: var(--gray-color);
            font-size: 0.9rem;
            margin-bottom: 10px;
        }

        .book-meta {
            display: flex;
            justify-content: space-between;
            font-size: 0.85rem;
            color: var(--gray-color);
        }

        .book-year {
            font-weight: 600;
        }

        .book-genre {
            background-color: #e8f4fc;
            color: var(--secondary-color);
            padding: 3px 8px;
            border-radius: 12px;
            font-size: 0.75rem;
            font-weight: 600;
        }

        /* Modal de Detalhes */
        .modal-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.7);
            display: flex;
            justify-content: center;
            align-items: center;
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.3s, visibility 0.3s;
        }

        .modal-overlay.active {
            opacity: 1;
            visibility: visible;
        }

        .modal {
            background-color: white;
            border-radius: 10px;
            width: 90%;
            max-width: 800px;
            max-height: 90vh;
            overflow-y: auto;
            position: relative;
        }

        .modal-close {
            position: absolute;
            top: 15px;
            right: 15px;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--gray-color);
            cursor: pointer;
            z-index: 10;
        }

        .modal-content {
            display: flex;
            flex-direction: column;
            padding: 30px;
        }

        .modal-book-cover {
            width: 100%;
            max-width: 250px;
            margin: 0 auto 25px;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
        }

        .modal-book-cover img {
            width: 100%;
            height: auto;
            display: block;
        }

        .modal-book-details {
            flex: 1;
        }

        .modal-book-title {
            font-size: 1.8rem;
            color: var(--primary-color);
            margin-bottom: 10px;
        }

        .modal-book-author {
            font-size: 1.2rem;
            color: var(--secondary-color);
            margin-bottom: 20px;
        }

        .modal-book-description {
            margin-bottom: 25px;
            line-height: 1.7;
        }

        .modal-book-meta {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 15px;
            margin-bottom: 25px;
        }

        .meta-item {
            display: flex;
            flex-direction: column;
        }

        .meta-label {
            font-size: 0.85rem;
            color: var(--gray-color);
            margin-bottom: 5px;
        }

        .meta-value {
            font-weight: 600;
            color: var(--primary-color);
        }

        .modal-actions {
            display: flex;
            gap: 10px;
            margin-top: 20px;
        }

        .modal-btn {
            padding: 10px 20px;
            border-radius: 4px;
            border: none;
            cursor: pointer;
            font-weight: 600;
            transition: background-color 0.3s;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .btn-edit {
            background-color: var(--secondary-color);
            color: white;
        }

        .btn-delete {
            background-color: #ffebee;
            color: var(--accent-color);
        }

        footer {
            background-color: #8e0404;
            color: white;
            padding: 40px 0 10px;
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-column h3 {
            font-size: 1.3rem;
            margin-bottom: 20px;
            color: white;
        }

        .footer-column p, .footer-column a {
            color: white;
            margin-bottom: 10px;
            display: block;
            text-decoration: none;
            transition: color 0.3s;
        }

        .footer-column a:hover {
            color: white;
        }

        .social-links {
            display: flex;
            gap: 15px;
            margin-top: 20px;
        }

        .social-links a {
            background-color: rgba(255, 255, 255, 0.1);
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            transition: all 0.3s;
        }

        .social-links a:hover {
            background-color: var(--secondary-color);
            transform: translateY(-5px);
        }

        /* Responsividade */
        @media (max-width: 992px) {
            .books-grid {
                grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
                gap: 20px;
            }
        }

        @media (max-width: 768px) {
            .header-content {
                flex-direction: column;
                gap: 20px;
            }
            
            .search-bar {
                width: 100%;
                max-width: 500px;
            }
            
            .filter-section {
                flex-direction: column;
                align-items: stretch;
            }
            
            .add-book-btn {
                margin-left: 0;
                justify-content: center;
            }
            
            .modal-content {
                padding: 20px;
            }
            
            .modal-book-title {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 576px) {
            .books-grid {
                grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
                gap: 15px;
            }
            
            .book-cover {
                height: 220px;
            }
            
            .modal-book-meta {
                grid-template-columns: 1fr;
            }
            
            .modal-actions {
                flex-direction: column;
            }
        }