body {
    font-family: Arial, sans-serif;
    background-color: #f2f2f2;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 400px;
    margin: 0 auto;
    padding: 20px;
    background-color: #fff;
    border-radius: 5px;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.2);
}

h1 {
    text-align: center;
}

input[type="text"] {
    width: 100%;
    padding: 10px;
    margin-bottom: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
}

button {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 10px 20px;
    cursor: pointer;
}

button:hover {
    background-color: #45a049;
}

ul {
    list-style-type: none;
    padding: 0;
}

li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 1px solid #ccc;
    border-radius: 5px;
    padding: 10px;
    margin-bottom: 5px;
    background-color: #fff;
}

.completed {
    text-decoration: line-through;
    color: #777;
}

.delete-button {
    background-color: #f44336;
    color: white;
    border: none;
    padding: 5px 10px;
    margin-left: 5px;
    cursor: pointer;
}

.delete-button:hover {
    background-color: #d32f2f;
}