body {
    font-family: Arial, sans-serif;
    background: #f4f6f9;
    display: flex;
    justify-content: center;
}

.container {
    width: 600px;
    background: white;
    padding: 20px;
    margin-top: 40px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

h1 {
    text-align: center;
}

.task-form input,
.task-form textarea,
.task-form button {
    width: 100%;
    margin: 8px 0;
    padding: 10px;
}

button {
    background: #4CAF50;
    color: white;
    border: none;
    cursor: pointer;
    border-radius: 5px;
}

button:hover {
    background: #45a049;
}

.task {
    border: 1px solid #ddd;
    padding: 10px;
    margin-top: 10px;
    border-radius: 5px;
}

.completed {
    text-decoration: line-through;
    background: #e0ffe0;
}

.filters {
    display: flex;
    justify-content: space-between;
    margin-top: 15px;
}