body {
    font-family: Arial, sans-serif;
    background: #f3f3f3;
    margin: 0;
    padding: 0;
}

.container {
    width: 90%;
    max-width: 500px;
    margin: 50px auto;
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0px 4px 10px rgba(0,0,0,0.1);
}

h1 {
    text-align: center;
    margin-bottom: 20px;
}

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

.input-section input, .input-section button {
    padding: 10px;
    font-size: 16px;
}

button {
    background: #007BFF;
    color: white;
    border: none;
    cursor: pointer;
    border-radius: 4px;
}

button:hover {
    background: #0056b3;
}

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

li {
    background: #f9f9f9;
    padding: 10px;
    margin-bottom: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-left: 5px solid #007BFF;
}

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

.task-buttons button {
    margin-left: 5px;
    background: #ccc;
    padding: 5px 8px;
    font-size: 14px;
}

.task-buttons button.edit { background: orange; color: white; }
.task-buttons button.delete { background: red; color: white; }
.task-buttons button.complete { background: green; color: white; }