body {
    background-color: #f7f7f7;
    font-family: 'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
    color: #333;
    padding: 20px;
}

button, p {
    padding: 10px 20px; 
    border: none;
    background-color: #eeeeee; 
    border-radius: 10px; 
    cursor: pointer; 
    outline: none; 
    margin: 10px; 
}

button:hover, p:hover {
    background-color: #dddddd; 
}

input {
    padding: 10px;
    border-radius: 10px; 
    border: 1px solid #cccccc;
    margin: 10px; 
}

input:hover {
    background-color: #eeeeee;
}

div {
    min-height: 50px; 
    background-color: #ffffff; 
    border-radius: 10px; 
    padding: 20px; 
    border: 1px solid #dddddd; 
    margin-top: 20px; 
}

li {
    background-color: #f9f9f9;
    margin: 5px 0;
    padding: 10px;
    border-radius: 10px;
    cursor: pointer;
    border: 1px solid #eaeaea;
}

.completed {
    text-decoration: line-through;
    color: #888;
}