body, html {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
}

header {
    background-color: #007BFF;
    color: white;
    padding: 10px 20px;
    text-align: center;
}

main {
    padding: 20px;
}

#todo-form {
    margin-bottom: 20px;
}

input[type="text"] {
    padding: 10px;
    width: 80%;
    margin-right: 10px;
}

button {
    padding: 10px;
    cursor: pointer;
}

#todo-list {
    margin-top: 20px;
}