body{
    font-family: Arial, sans-serif;
    margin: 20px;
    background-color: #f5f5f5;
}

header{
    text-align: center;
    background: lightgray;
    padding: 20px;
    border-radius: 10px;
}

h1{
    color: darkblue;
}

h2{
    color: blue;
}

p{
    font-size: 16px;
}

ul{
    list-style-type: square;
}