* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    background-color: #f4f4f4;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    background: #fff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 400px;
    text-align: center;
}

h1 {
    margin-bottom: 20px;
}

.todo-form {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

input, select, textarea, button {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
}

button {
    background: #28a745;
    color: white;
    cursor: pointer;
    border: none;
}

button:hover {
    background: #218838;
}

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

.task-item {
    background: #fff;
    margin: 10px 0;
    padding: 10px;
    border-radius: 5px;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.1);
    position: relative;
}

.task-item.completed {
    text-decoration: line-through;
    background: #d4edda;
}

.task-actions {
    display: flex;
    justify-content: space-between;
    margin-top: 10px;
}

.task-actions button {
    padding: 5px;
    font-size: 14px;
    border-radius: 5px;
    cursor: pointer;
}

.edit-btn {
    background: #ffc107;
    color: white;
}

.delete-btn {
    background: #dc3545;
    color: white;
}

.complete-btn {
    background: #007bff;
    color: white;
}

@media (max-width: 500px) {
    .container {
        width: 90%;
    }
}