/* Style for the rotating spinner */
.spinner {
    display: inline-block;
    margin-left: 10px;
    border: 4px solid rgba(0, 0, 0, 0.1);
    border-top: 4px solid #3498db;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Start Book Upload Form Table styling */
#book-upload-form .form-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

#book-upload-form .form-table th,
#book-upload-form .form-table td {
    padding: 12px;
    vertical-align: top;
    border-bottom: 1px solid #eee;
}

#book-upload-form .form-table th {
    width: 30%;
    text-align: left;
    font-weight: 500;
}

/* Category container */
#book-upload-form .category-scroll-container {
    max-height: 250px;
    overflow-y: auto;
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 10px;
    background: #f8f9fa;
}

#book-upload-form .category-checkbox-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 8px;
}

#book-upload-form .category-option {
    display: flex;
    align-items: center;
    position: relative;
    padding: 8px;
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
}

#book-upload-form .category-option:hover {
    background: #f1f3f5;
    border-color: #999;
}

#book-upload-form .category-option input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}

#book-upload-form .checkmark {
    position: relative;
    height: 18px;
    width: 18px;
    background-color: #fff;
    border: 2px solid #666;
    border-radius: 3px;
    margin-right: 10px;
}

#book-upload-form .category-option input:checked ~ .checkmark {
    background-color: #007bff;
    border-color: #007bff;
}

#book-upload-form .checkmark:after {
    content: "";
    position: absolute;
    display: none;
    left: 5px;
    top: 1px;
    width: 4px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

#book-upload-form .category-option input:checked ~ .checkmark:after {
    display: block;
}

#book-upload-form .category-hint {
    margin: 8px 0 0;
    color: #666;
    font-size: 0.9em;
}

/* Form elements */
#book-upload-form input[type="text"],
#book-upload-form textarea,
#book-upload-form select {
    width: 100%;
    max-width: 500px;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

#book-upload-form textarea {
    height: 100px;
}

#book-upload-form button {
    background: #007bff;
    color: white;
    padding: 12px 24px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    transition: background 0.3s;
}

#book-upload-form button:hover {
    background: #0056b3;
}

#book-upload-form button:disabled {
    background: #6c757d;
    cursor: not-allowed;
}

#book-upload-form input[type="url"] {
    width: 100%;
    max-width: 500px;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
}
#book-upload-form small {
    display: block;
    color: #666;
    font-size: 0.8em;
    margin-top: 4px;
}
/* End Book Upload Form Table styling */