#editor {
    padding: 10px;
    border: 1px solid #ccc;
    width: 100%;
    height: 300px;
    box-sizing: border-box;
}

#previewButton, #disappearButton {
    padding: 10px 20px;
    margin: 10px;
    border: none;
    background-color: #007BFF;
    color: white;
    cursor: pointer;
    border-radius: 5px;
}

#previewButton:hover, #disappearButton:hover {
    background-color: #0056b3;
}

#preview {
    padding: 10px;
    border: 1px solid #ccc;
    margin-top: 20px;
    min-height: 100px;
    box-sizing: border-box;
}

.disappear {
    transition: opacity 1s ease-out;
    opacity: 0;
}