* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background-color: #121212;
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

header {
    position: absolute;
    top: 0;
    left: 0;
    padding: 20px;
}

main {
    width: 300px;
}

.todo-container {
    background-color: #1f1f1f;
    padding: 20px;
    border-radius: 10px;
}

.todo-header {
    margin-bottom: 20px;
}

.todo-header h2 {
    margin-bottom: 5px;
}

#todoList {
    list-style: none;
    padding: 0;
    margin-bottom: 20px;
}

#todoList li {
    background-color: #2c2c2c;
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
}

.todo-input {
    display: flex;
    justify-content: space-between;
}

input {
    flex-grow: 1;
    padding: 10px;
    border-radius: 5px;
    border: none;
    margin-right: 10px;
}

button {
    padding: 10px 20px;
    background-color: #4caf50;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

button:hover {
    background-color: #45a049;
}