html, body {
    font-family: 'Urbanist', sans-serif;
    background-color: #f4f4f4;
    color: #333;
    height: 100%;
    margin: 0; 
    display: flex;
    flex-direction: column; 
    justify-content: space-between; 
    align-items: center;
}

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

.search-container,
.bookshelf-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 80%;
    flex-grow: 1;
}

.results-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin: 20px 0;
}

.book-tile {
    border: 2px solid #0e0f0f; 
    border-radius: 5px;
    padding: 10px;
    margin: 10px;
    width: calc(25% - 20px); 
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.book-tile img {
    max-width: 100%;
    height: auto;
}

.navigation {
    display: flex;
    justify-content: center;
    margin: 20px 0;
}

.back-button {
    display: block;
    margin: 10px auto;
    padding: 10px 20px;
    font-size: 18px;
    cursor: pointer;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 5px;
}

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

footer {
    text-align: center;
    margin-top: auto;
    width: 100%;
    padding: 20px 0;
}