.thumbnails {
    display: flex;
    justify-content: center;
    gap: 1.25rem;
    margin-bottom: 1.25rem;
}

.thumbnail {
    display: flex;
    flex-direction: column;
    align-items: center;
    opacity: 0;
    transition: opacity 1s;
}

.thumbnail img {
    width: 9.375rem;
    height: 9.375rem;
    border-radius: var(--radius);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.isbn {
    margin-top: 0.625rem;
    font-size: 0.75rem;
    color: var(--muted);
}

.input-container {
    display: none;
    margin-top: 1.25rem;
}


@media (max-width: 1440px) {
    .thumbnails {
        gap: 1.125rem;
        margin-bottom: 1.125rem;
    }
    .thumbnail img {
        width: 8.75rem;
        height: 8.75rem;
    }
    .isbn {
        margin-top: 0.6rem;
        font-size: 0.725rem;
    }
    .input-container {
        margin-top: 1.125rem;
    }
}

@media (max-width: 1024px) {
    .thumbnails {
        gap: 1rem;
        margin-bottom: 1rem;
        flex-wrap: wrap;
    }
    .thumbnail img {
        width: 8rem;
        height: 8rem;
    }
    .isbn {
        margin-top: 0.575rem;
        font-size: 0.7rem;
    }
    .input-container {
        margin-top: 1rem;
    }
}

@media (max-width: 768px) {
    .thumbnails {
        gap: 0.875rem;
        margin-bottom: 0.875rem;
        flex-direction: column;
        align-items: center;
    }
    .thumbnail img {
        width: 7rem;
        height: 7rem;
    }
    .isbn {
        margin-top: 0.55rem;
        font-size: 0.675rem;
    }
    .input-container {
        margin-top: 0.875rem;
    }
}

@media (max-width: 480px) {
    .thumbnails {
        gap: 0.75rem;
        margin-bottom: 0.75rem;
    }
    .thumbnail img {
        width: 6rem;
        height: 6rem;
    }
    .isbn {
        margin-top: 0.525rem;
        font-size: 0.65rem;
    }
    .input-container {
        margin-top: 0.75rem;
    }
}

@media (max-width: 375px) {
    .thumbnails {
        gap: 0.625rem;
        margin-bottom: 0.625rem;
    }
    .thumbnail img {
        width: 5rem;
        height: 5rem;
    }
    .isbn {
        margin-top: 0.5rem;
        font-size: 0.625rem;
    }
    .input-container {
        margin-top: 0.625rem;
    }
}