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

body {
    background-color: #f4f4f4;
    display: grid;
    justify-content: center;
    padding: 50px;
}

header {
    display: flex;
    flex-direction: column;
    text-align: center;
    margin-bottom: 40px;
    color:brown;
}

div {
    display: flex;
    gap: 10px;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    width: 400px;

}
input[type="text"] {
    padding: 10px;
    width: 300px;
    border: 1px solid #ccc;
    border-radius: 5px;
}

input[type="date"] {
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
}
button {
    padding: 5px;
    background-color: brown;
    color: white;
    border: none;
    width: 50px;
    height: 30px;
    border-radius: 5px;
    cursor: pointer;
}
button:hover {
    background-color: darkred;
}
ul {
    list-style-type: none;
    width: 100%;
}

li {
    margin-bottom: 10px;
    padding: 20px;
    border-radius: 5px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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