body {
    font-family: Arial, sans-serif;
    background: #1e1e2f;
    color: white;
    display: flex;
    justify-content: center;
    margin-top: 50px;
}

.container {
    width: 350px;
    background: #2a2a40;
    padding: 20px;
    border-radius: 10px;
}

h1 {
    text-align: center;
}

.input-section {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

input, button {
    padding: 10px;
    border-radius: 5px;
    border: none;
}

button {
    background: #4caf50;
    color: white;
    cursor: pointer;
}

button:hover {
    background: #45a049;
}

ul {
    list-style: none;
    padding: 0;
    margin-top: 20px;
}

li {
    background: #3a3a55;
    padding: 10px;
    margin-bottom: 10px;
    border-radius: 5px;
}

.completed {
    text-decoration: line-through;
    opacity: 0.6;
}

.task-buttons button {
    margin-right: 5px;
    background: #2196f3;
}

.task-buttons .delete {
    background: #f44336;
}