body {
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
}

.container {
    max-width: 400px;
    margin: 40px auto;
    padding: 20px;
    background-color: #fff;
    border: 1px solid #ddd;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

#task-input {
    width: 70%;
    padding: 10px;
    margin-right: 10px;
    border: 1px solid #ccc;
}

#add-task-btn {
    background-color: #4CAF50;
    color: #fff;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

#add-task-btn:hover {
    background-color: #3e8e41;
}

#task-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.task {
    background-color: #f7f7f7;
    padding: 10px;
    border-bottom: 1px solid #ccc;
}

.task:last-child {
    border-bottom: none;
}

.done {
    text-decoration: line-through;
}