#history-list {
    list-style-type: none;
    padding: 0;
}
#history-list li {
    background-color: white;
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 5px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
#history-list li:hover {
    background-color: #f0f0f0;
}
.history-text {
    flex-grow: 1;
}
.undo-btn {
    background-color: #ffc107;
    color: black;
    border: none;
    padding: 5px 10px;
    border-radius: 5px;
    cursor: pointer;
    margin-left: 10px;
    flex-shrink: 0;
}
.undo-btn:disabled {
    background-color: #e0e0e0;
    cursor: not-allowed;
}