body {
    font-family: Arial, sans-serif;
    margin: 20px;
}
.container {
    max-width: 600px;
    margin: auto;
}
textarea {
    width: 100%;
    padding: 10px;
    margin-bottom: 20px;
    font-size: 1em;
}
button {
    padding: 10px 20px;
    font-size: 1em;
    cursor: pointer;
    margin-left: 10px;
}
ul {
    list-style-type: none;
    padding: 0;
}
li {
    background: #f4f4f4;
    margin: 5px 0;
    padding: 10px;
    border: 1px solid #ddd;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
li.selected {
    background: #d0f0d0;
}
.dragging {
    opacity: 0.5;
}