body {

    font-family: Arial, sans-serif;

    margin: 20px;

}



h1 {

    text-align: center;

    color: #333;

}



.book-title, .popup-book-title, .custom-button {

    border: 2px solid #007BFF;

    border-radius: 5px;

    padding: 10px;

    display: flex;

    align-items: center;

}



.book-title {

    flex-wrap: wrap;

    margin-bottom: 20px;

    cursor: pointer;

}



.popup-book-title {

    justify-content: center;

    flex-wrap: wrap;

    max-width: 90vw;

    width: auto;

    margin-bottom: 20px;

    white-space: normal;

    text-align: center;

    display: block;

    cursor: default;

}



.book-title:hover {

    background-color: #f0f8ff;

    cursor: pointer;

}



.custom-button:hover {

    background-color: #f0f8ff;

}



.word-container, .popup-book-title .word {

    display: flex;

    flex-direction: column;

    align-items: center;

    margin-right: 10px;

    max-width: 20vw;

}



.word-container img, .popup-book-title .word img {

    width: min(20vw, 100px);

    height: auto;

    border-radius: 5px;

    margin-bottom: 5px;

}



.word-container span, .popup-book-title .word span {

    font-size: min(4vw, 18px);

}



.popup {

    display: none;

    position: fixed;

    top: 50%;

    left: 50%;

    transform: translate(-50%, -50%);

    background-color: white;

    padding: 20px;

    border: 1px solid #ccc;

    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);

    z-index: 1000;

    max-width: 90vw;

    width: auto;

    text-align: center;

}



.popup h2 {

    margin-top: 0;

    text-align: center;

}



.popup .custom-button {

    cursor: grab;

}



.overlay, #overlay {

    display: none;

    position: fixed;

    top: 0;

    left: 0;

    width: 100%;

    height: 100%;

    background: rgba(0, 0, 0, 0.5);

    z-index: 999;

}



#indietro {

    position: fixed;

    right: 20px;

    bottom: 20px;

    padding: 10px 20px;

    background-color: white;

    color: black;

    font-size: 18px;

    font-weight: bold;

    border-radius: 10px;

    border: 5px solid olivedrab;

    cursor: grab;

    box-shadow: 2px 2px 10px rgba(0, 0, 0, 0.3);

}



#indietro:hover {

    background-color: rgba(106, 142, 35, 0.315);

}



.button-container {

    display: grid;

    grid-template-columns: repeat(2, 1fr);

    gap: 10px;

    justify-content: center;

    max-width: 400px;

    margin: 20px auto;

}



.custom-button {

    background-color: #ffffff;

    flex-direction: column;

    justify-content: center;

    cursor: pointer;

}



.custom-button img {

    display: block;

    width: 100px;

    height: 100px;

    object-fit: cover;

    border-radius: 5px;

}



.custom-button span {

    display: block;

    margin-top: 5px;

    font-size: 14px;

}