body {
    font-family: Arial, sans-serif;
    /* background-color: #f4f7f6; */
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    padding-top: 50px;
}


nav {
    display: flex;
    position: fixed;
    top: 0;
    width: 100%;
    /* background-color: #031926; */
    /* color: black; */
    overflow: auto;
    height: auto;
}

.left-links {
    flex: 1 1 200px;
}

.links {
    font-family: Verdana, sans-serif;
    display: inline-block;
    text-align: center;
    padding: 14px;
    color: black;
    text-decoration: none;
    font-size: 15px;
}

.links:hover {
    background-color: #007bff;
    color: #fff;
}


.container {
    width: 100%;
    max-width: 1000px;
    padding: 20px;
    border-radius: 8px;
}

/* h1 {
    text-align: center;
    color: #333;
    margin-bottom: 20px;
} */

.search-box {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

#searchInput {
    flex-grow: 1;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

#searchBtn {
    padding: 10px 20px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
}

#searchBtn:hover {
    background-color: #0056b3;
}

/* Danh sách các kiểu Media ở trang chủ */
.tabs {
    border: 1px solid black;
    padding: 10px;
    border-radius: 5px;
    text-align: center;
}

.tab-link {
    text-decoration: none;
    margin: 0 15px;
    color: black;
    font-size: 16px;
    text-transform: uppercase;
}

.tab-link:hover {
    color: #007bff;
}

/* Trang kết quả */

#results {
    border-top: 1px solid #eee;
    padding-top: 20px;
}

.word-entry {
    background-color: #f9f9f9;
    border: 1px solid #e1e1e1;
    padding: 15px;
    border-radius: 6px;
    margin-bottom: 15px;
}

.word-title {
    font-size: 24px;
    font-weight: bold;
    color: #007bff;
    margin-bottom: 10px;
}

.definition-list {
    list-style-type: none;
    padding-left: 0;
    margin-top: 10px;
}

.definition-item {
    background-color: #fff;
    border-left: 3px solid #007bff;
    padding: 10px 15px;
    margin-bottom: 8px;
    border-radius: 4px;
}

.dict-name {
    font-style: italic;
    color: #666;
    font-size: 14px;
    margin-bottom: 5px;
}

/* --- Bố cục lưới cho các tác phẩm --- */
.book-grid {
    display: grid;
    max-width: 1200px;
    margin: 20px auto;
    padding: 0 20px;
    gap: 25px;
    /* Khoảng cách giữa các thẻ */

    /* Mặc định cho màn hình lớn: 4 cột */
    grid-template-columns: repeat(4, 1fr);
}

/* --- Kiểu cho mỗi thẻ tác phẩm --- */
.book-card {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}


.book-card .book-cover {
    width: 100%;
    height: 300px;
    /* Chiều cao cố định cho ảnh bìa */
    object-fit: cover;
    /* Đảm bảo ảnh luôn vừa vặn */
    background-color: #eee;
}

.book-card .book-info {
    padding: 15px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.book-info .title {
    font-size: 1.1em;
    font-weight: bold;
    margin: 0;
}

.book-info .author {
    font-size: 0.9em;
    color: #666;
    margin: 5px 0 15px 0;
}

/* --- Kiểu nút "Xem thêm" --- */
.view-more-button {
    background-color: #007bff;
    /* Màu xanh dương (thay vì xanh lá để hiện đại hơn) */
    color: white;
    border: none;
    padding: 12px 15px;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    margin-top: auto;
    /* Đẩy nút xuống dưới cùng của thẻ */
}

.view-more-button:hover {
    background-color: #0056b3;
    /* Màu xanh đậm hơn khi di chuột */
}

/* Book details for details.html */
.details-container {
    max-width: 1000px;
    margin: 20px auto;
    padding: 20px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

/* Vocabulary section */
#vocabulary-section {
    max-width: 1000px;
    margin: 20px auto;
    padding: 20px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

#vocabulary-section h3 {
    margin-top: 0;
    font-size: 1.5rem;
    color: #333;
}

.vocabulary-grid {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.vocab-box {
    display: flex;
    justify-content: space-between;
    padding: 10px;
    background-color: #f9f9f9;
    border-radius: 5px;
    border: 1px solid #ddd;
}

.vocab-term {
    flex: 1;
    font-weight: bold;
    color: #333;
}

.vocab-definition {
    flex: 2;
    color: #666;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
}

.pagination button {
    background-color: #007bff;
    color: white;
    border: none;
    padding: 8px 12px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.9rem;
}

.pagination button:hover {
    background-color: #0056b3;
}

.pagination button:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}

.pagination button.active {
    background-color: #0056b3;
    font-weight: bold;
}

.page-input-container {
    display: flex;
    align-items: center;
    gap: 5px;
}

.page-input {
    width: 60px;
    padding: 6px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 0.9rem;
    text-align: center;
}

.go-button {
    background-color: #28a745;
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.9rem;
}

.go-button:hover {
    background-color: #218838;
}

/* --- CSS đáp ứng cho các kích cỡ màn hình khác nhau --- */

/* Tablet (iPad): 2 cột */
@media (max-width: 992px) {
    .book-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .book-info .title {
        font-size: 1.1rem;
    }

    .book-info .author {
        font-size: 0.85rem;
    }

    .view-more-button {
        padding: 6px 12px;
        font-size: 0.85rem;
        margin-bottom: 10px;
    }

    /* Book details for details.html */
    .details-container {
        flex-direction: column;
        align-items: center;
        padding: 15px;
    }

    /* Vocabulary section */
    #vocabulary-section {
        padding: 15px;
    }

    #vocabulary-section h3 {
        font-size: 1.3rem;
    }

    .vocab-box {
        flex-direction: column;
        gap: 5px;
        padding: 8px;
    }

    .vocab-term, .vocab-definition {
        flex: none;
        font-size: 0.9rem;
    }

    .vocab-term {
        font-weight: bold;
    }

    .vocab-definition {
        font-style: italic;
    }

    /* Pagination */
    .pagination {
        gap: 5px;
        flex-wrap: wrap;
    }

    .pagination button {
        padding: 6px 10px;
        font-size: 0.85rem;
    }

    .pagination span {
        padding: 6px 10px;
        font-size: 0.85rem;
    }

    .page-input {
        width: 50px;
        padding: 5px;
        font-size: 0.85rem;
    }

    .go-button {
        padding: 5px 10px;
        font-size: 0.85rem;
    }
}

/* Điện thoại: 1 cột */
@media (max-width: 576px) {
    .book-grid {
        grid-template-columns: 1fr;
    }

    .book-card .book-cover {
        height: 200px;
        /* Tăng chiều cao ảnh trên điện thoại */
    }

    .book-info .title {
        font-size: 1rem;
    }

    .book-info .author {
        font-size: 0.8rem;
    }

    .view-more-button {
        padding: 5px 10px;
        font-size: 0.8rem;
    }

    /* Book details for details.html */
    .details-container {
        margin: 10px;
        padding: 10px;
    }

    /* Vocabulary section */
    #vocabulary-section {
        margin: 10px;
        padding: 10px;
    }

    #vocabulary-section h3 {
        font-size: 1.1rem;
    }

    .vocab-box {
        padding: 6px;
    }

    .vocab-term,
    .vocab-definition {
        font-size: 0.8rem;
    }

    /* Pagination */
    .pagination {
        gap: 3px;
    }

    .pagination button {
        padding: 5px 8px;
        font-size: 0.8rem;
    }

    .pagination span {
        padding: 5px 8px;
        font-size: 0.8rem;
    }

    .page-input {
        width: 45px;
        padding: 4px;
        font-size: 0.8rem;
    }

    .go-button {
        padding: 4px 8px;
        font-size: 0.8rem;
    }
}