body {
    font-family: Arial, sans-serif;
    margin: 20px;
}
ul {
    list-style-type: none;
    padding: 0;
}
li {
    margin: 10px 0;
    padding: 10px;
    border: 1px solid #ddd;
    display: flex;
    align-items: center;
}
li.folder {
    background: #f0f0f0;
}
img.preview {
    max-width: 100px;
    max-height: 100px;
    margin-left: 10px;
}
button {
    margin-left: 10px;
}